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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 12:22:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 12:22:13 -0800
commit9977d9b379cb77e0f67bd6f4563618106e58e11d (patch)
tree0191accfddf578edb52c69c933d64521e3dce297 /arch
parentcf4af01221579a4e895f43dbfc47598fbfc5a731 (diff)
parent541880d9a2c7871f6370071d55aa6662d329c51e (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull big execve/kernel_thread/fork unification series from Al Viro: "All architectures are converted to new model. Quite a bit of that stuff is actually shared with architecture trees; in such cases it's literally shared branch pulled by both, not a cherry-pick. A lot of ugliness and black magic is gone (-3KLoC total in this one): - kernel_thread()/kernel_execve()/sys_execve() redesign. We don't do syscalls from kernel anymore for either kernel_thread() or kernel_execve(): kernel_thread() is essentially clone(2) with callback run before we return to userland, the callbacks either never return or do successful do_execve() before returning. kernel_execve() is a wrapper for do_execve() - it doesn't need to do transition to user mode anymore. As a result kernel_thread() and kernel_execve() are arch-independent now - they live in kernel/fork.c and fs/exec.c resp. sys_execve() is also in fs/exec.c and it's completely architecture-independent. - daemonize() is gone, along with its parts in fs/*.c - struct pt_regs * is no longer passed to do_fork/copy_process/ copy_thread/do_execve/search_binary_handler/->load_binary/do_coredump. - sys_fork()/sys_vfork()/sys_clone() unified; some architectures still need wrappers (ones with callee-saved registers not saved in pt_regs on syscall entry), but the main part of those suckers is in kernel/fork.c now." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (113 commits) do_coredump(): get rid of pt_regs argument print_fatal_signal(): get rid of pt_regs argument ptrace_signal(): get rid of unused arguments get rid of ptrace_signal_deliver() arguments new helper: signal_pt_regs() unify default ptrace_signal_deliver flagday: kill pt_regs argument of do_fork() death to idle_regs() don't pass regs to copy_process() flagday: don't pass regs to copy_thread() bfin: switch to generic vfork, get rid of pointless wrappers xtensa: switch to generic clone() openrisc: switch to use of generic fork and clone unicore32: switch to generic clone(2) score: switch to generic fork/vfork/clone c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone() take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h mn10300: switch to generic fork/vfork/clone h8300: switch to generic fork/vfork/clone tile: switch to generic clone() ... Conflicts: arch/microblaze/include/asm/Kbuild
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig14
-rw-r--r--arch/alpha/include/asm/ptrace.h1
-rw-r--r--arch/alpha/include/asm/signal.h3
-rw-r--r--arch/alpha/include/asm/unistd.h3
-rw-r--r--arch/alpha/kernel/binfmt_loader.c4
-rw-r--r--arch/alpha/kernel/entry.S51
-rw-r--r--arch/alpha/kernel/process.c62
-rw-r--r--arch/alpha/kernel/signal.c16
-rw-r--r--arch/alpha/kernel/systbls.S6
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/include/asm/signal.h1
-rw-r--r--arch/arm/include/asm/unistd.h3
-rw-r--r--arch/arm/kernel/calls.S6
-rw-r--r--arch/arm/kernel/entry-common.S16
-rw-r--r--arch/arm/kernel/process.c11
-rw-r--r--arch/arm/kernel/sys_arm.c31
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/include/asm/syscalls.h6
-rw-r--r--arch/arm64/include/asm/unistd.h3
-rw-r--r--arch/arm64/include/asm/unistd32.h4
-rw-r--r--arch/arm64/kernel/process.c9
-rw-r--r--arch/arm64/kernel/sys.c11
-rw-r--r--arch/arm64/kernel/sys_compat.c11
-rw-r--r--arch/avr32/Kconfig2
-rw-r--r--arch/avr32/include/asm/processor.h3
-rw-r--r--arch/avr32/include/asm/signal.h2
-rw-r--r--arch/avr32/include/asm/unistd.h4
-rw-r--r--arch/avr32/kernel/Makefile2
-rw-r--r--arch/avr32/kernel/entry-avr32b.S14
-rw-r--r--arch/avr32/kernel/process.c115
-rw-r--r--arch/avr32/kernel/sys_avr32.c24
-rw-r--r--arch/avr32/kernel/syscall-stubs.S24
-rw-r--r--arch/avr32/kernel/syscall_table.S8
-rw-r--r--arch/blackfin/Kconfig2
-rw-r--r--arch/blackfin/include/asm/processor.h2
-rw-r--r--arch/blackfin/include/asm/unistd.h2
-rw-r--r--arch/blackfin/kernel/entry.S55
-rw-r--r--arch/blackfin/kernel/process.c98
-rw-r--r--arch/blackfin/kernel/signal.c4
-rw-r--r--arch/blackfin/mach-common/entry.S57
-rw-r--r--arch/c6x/Kconfig1
-rw-r--r--arch/c6x/include/asm/syscalls.h4
-rw-r--r--arch/c6x/include/uapi/asm/unistd.h2
-rw-r--r--arch/c6x/kernel/entry.S24
-rw-r--r--arch/c6x/kernel/process.c25
-rw-r--r--arch/cris/Kconfig3
-rw-r--r--arch/cris/arch-v10/kernel/entry.S17
-rw-r--r--arch/cris/arch-v10/kernel/process.c121
-rw-r--r--arch/cris/arch-v32/kernel/entry.S22
-rw-r--r--arch/cris/arch-v32/kernel/process.c118
-rw-r--r--arch/cris/include/asm/processor.h2
-rw-r--r--arch/cris/include/asm/signal.h6
-rw-r--r--arch/cris/include/asm/unistd.h4
-rw-r--r--arch/cris/kernel/crisksyms.c1
-rw-r--r--arch/frv/include/asm/unistd.h3
-rw-r--r--arch/frv/kernel/process.c45
-rw-r--r--arch/h8300/Kconfig2
-rw-r--r--arch/h8300/include/asm/processor.h2
-rw-r--r--arch/h8300/include/asm/ptrace.h3
-rw-r--r--arch/h8300/include/asm/signal.h2
-rw-r--r--arch/h8300/include/asm/unistd.h4
-rw-r--r--arch/h8300/kernel/entry.S9
-rw-r--r--arch/h8300/kernel/h8300_ksyms.c1
-rw-r--r--arch/h8300/kernel/process.c100
-rw-r--r--arch/h8300/kernel/sys_h8300.c26
-rw-r--r--arch/h8300/kernel/syscalls.S9
-rw-r--r--arch/hexagon/Kconfig2
-rw-r--r--arch/hexagon/include/asm/processor.h1
-rw-r--r--arch/hexagon/include/asm/syscall.h8
-rw-r--r--arch/hexagon/include/uapi/asm/ptrace.h4
-rw-r--r--arch/hexagon/include/uapi/asm/unistd.h2
-rw-r--r--arch/hexagon/kernel/Makefile3
-rw-r--r--arch/hexagon/kernel/process.c100
-rw-r--r--arch/hexagon/kernel/signal.c4
-rw-r--r--arch/hexagon/kernel/syscall.c89
-rw-r--r--arch/hexagon/kernel/vm_entry.S4
-rw-r--r--arch/ia64/Kconfig2
-rw-r--r--arch/ia64/include/asm/processor.h16
-rw-r--r--arch/ia64/include/asm/signal.h2
-rw-r--r--arch/ia64/include/asm/unistd.h1
-rw-r--r--arch/ia64/kernel/entry.S53
-rw-r--r--arch/ia64/kernel/head.S13
-rw-r--r--arch/ia64/kernel/process.c161
-rw-r--r--arch/ia64/kernel/smpboot.c5
-rw-r--r--arch/m32r/Kconfig2
-rw-r--r--arch/m32r/include/asm/processor.h5
-rw-r--r--arch/m32r/include/asm/ptrace.h2
-rw-r--r--arch/m32r/include/asm/signal.h4
-rw-r--r--arch/m32r/include/asm/unistd.h4
-rw-r--r--arch/m32r/kernel/entry.S9
-rw-r--r--arch/m32r/kernel/m32r_ksyms.c1
-rw-r--r--arch/m32r/kernel/process.c126
-rw-r--r--arch/m32r/kernel/sys_m32r.c21
-rw-r--r--arch/m68k/Kconfig1
-rw-r--r--arch/m68k/include/asm/signal.h8
-rw-r--r--arch/m68k/include/asm/unistd.h3
-rw-r--r--arch/m68k/kernel/entry.S30
-rw-r--r--arch/m68k/kernel/process.c87
-rw-r--r--arch/m68k/kernel/signal.c3
-rw-r--r--arch/m68k/kernel/syscalltable.S6
-rw-r--r--arch/microblaze/Kconfig3
-rw-r--r--arch/microblaze/include/asm/Kbuild1
-rw-r--r--arch/microblaze/include/asm/processor.h8
-rw-r--r--arch/microblaze/include/asm/syscalls.h16
-rw-r--r--arch/microblaze/include/asm/unistd.h6
-rw-r--r--arch/microblaze/kernel/entry-nommu.S20
-rw-r--r--arch/microblaze/kernel/entry.S57
-rw-r--r--arch/microblaze/kernel/process.c75
-rw-r--r--arch/microblaze/kernel/sys_microblaze.c53
-rw-r--r--arch/microblaze/kernel/syscall_table.S6
-rw-r--r--arch/mips/Kconfig2
-rw-r--r--arch/mips/include/asm/processor.h2
-rw-r--r--arch/mips/include/asm/ptrace.h6
-rw-r--r--arch/mips/include/asm/signal.h2
-rw-r--r--arch/mips/include/asm/unistd.h1
-rw-r--r--arch/mips/kernel/entry.S6
-rw-r--r--arch/mips/kernel/linux32.c23
-rw-r--r--arch/mips/kernel/mips_ksyms.c2
-rw-r--r--arch/mips/kernel/process.c64
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
-rw-r--r--arch/mips/kernel/syscall.c57
-rw-r--r--arch/mn10300/Kconfig1
-rw-r--r--arch/mn10300/include/asm/signal.h4
-rw-r--r--arch/mn10300/include/asm/unistd.h4
-rw-r--r--arch/mn10300/kernel/entry.S7
-rw-r--r--arch/mn10300/kernel/process.c33
-rw-r--r--arch/openrisc/Kconfig2
-rw-r--r--arch/openrisc/include/asm/processor.h2
-rw-r--r--arch/openrisc/include/asm/syscalls.h7
-rw-r--r--arch/openrisc/include/uapi/asm/unistd.h4
-rw-r--r--arch/openrisc/kernel/Makefile2
-rw-r--r--arch/openrisc/kernel/entry.S55
-rw-r--r--arch/openrisc/kernel/process.c164
-rw-r--r--arch/openrisc/kernel/sys_or32.c57
-rw-r--r--arch/parisc/Kconfig3
-rw-r--r--arch/parisc/include/asm/processor.h1
-rw-r--r--arch/parisc/include/asm/signal.h2
-rw-r--r--arch/parisc/include/asm/unistd.h4
-rw-r--r--arch/parisc/kernel/entry.S241
-rw-r--r--arch/parisc/kernel/process.c142
-rw-r--r--arch/parisc/kernel/sys_parisc32.c22
-rw-r--r--arch/parisc/kernel/syscall_table.S2
-rw-r--r--arch/powerpc/Kconfig2
-rw-r--r--arch/powerpc/include/asm/signal.h2
-rw-r--r--arch/powerpc/include/asm/syscalls.h9
-rw-r--r--arch/powerpc/include/asm/unistd.h4
-rw-r--r--arch/powerpc/kernel/entry_32.S5
-rw-r--r--arch/powerpc/kernel/entry_64.S8
-rw-r--r--arch/powerpc/kernel/process.c64
-rw-r--r--arch/s390/Kconfig2
-rw-r--r--arch/s390/include/asm/signal.h2
-rw-r--r--arch/s390/include/asm/unistd.h4
-rw-r--r--arch/s390/kernel/entry.S32
-rw-r--r--arch/s390/kernel/entry.h4
-rw-r--r--arch/s390/kernel/entry64.S26
-rw-r--r--arch/s390/kernel/process.c53
-rw-r--r--arch/score/Kconfig3
-rw-r--r--arch/score/include/asm/processor.h1
-rw-r--r--arch/score/include/asm/syscalls.h2
-rw-r--r--arch/score/include/asm/unistd.h4
-rw-r--r--arch/score/kernel/entry.S30
-rw-r--r--arch/score/kernel/process.c57
-rw-r--r--arch/score/kernel/sys_score.c89
-rw-r--r--arch/sh/Kconfig2
-rw-r--r--arch/sh/include/asm/processor_32.h5
-rw-r--r--arch/sh/include/asm/processor_64.h5
-rw-r--r--arch/sh/include/asm/syscalls_32.h14
-rw-r--r--arch/sh/include/asm/syscalls_64.h17
-rw-r--r--arch/sh/include/asm/unistd.h4
-rw-r--r--arch/sh/kernel/Makefile3
-rw-r--r--arch/sh/kernel/cpu/sh5/entry.S19
-rw-r--r--arch/sh/kernel/entry-common.S13
-rw-r--r--arch/sh/kernel/process_32.c134
-rw-r--r--arch/sh/kernel/process_64.c127
-rw-r--r--arch/sh/kernel/sys_sh32.c24
-rw-r--r--arch/sh/kernel/sys_sh64.c50
-rw-r--r--arch/sparc/Kconfig2
-rw-r--r--arch/sparc/include/asm/processor_32.h1
-rw-r--r--arch/sparc/include/asm/processor_64.h11
-rw-r--r--arch/sparc/include/asm/ptrace.h10
-rw-r--r--arch/sparc/include/asm/signal.h2
-rw-r--r--arch/sparc/include/asm/switch_to_64.h2
-rw-r--r--arch/sparc/include/asm/syscalls.h2
-rw-r--r--arch/sparc/include/asm/thread_info_64.h25
-rw-r--r--arch/sparc/include/asm/uaccess_64.h4
-rw-r--r--arch/sparc/include/asm/unistd.h1
-rw-r--r--arch/sparc/kernel/entry.S51
-rw-r--r--arch/sparc/kernel/etrap_64.S8
-rw-r--r--arch/sparc/kernel/process_32.c158
-rw-r--r--arch/sparc/kernel/process_64.c148
-rw-r--r--arch/sparc/kernel/sys_sparc32.c36
-rw-r--r--arch/sparc/kernel/sys_sparc_32.c24
-rw-r--r--arch/sparc/kernel/sys_sparc_64.c22
-rw-r--r--arch/sparc/kernel/syscalls.S30
-rw-r--r--arch/sparc/kernel/systbls_64.S2
-rw-r--r--arch/sparc/kernel/traps_64.c4
-rw-r--r--arch/sparc/mm/init_64.c2
-rw-r--r--arch/tile/Kconfig2
-rw-r--r--arch/tile/include/asm/compat.h15
-rw-r--r--arch/tile/include/asm/elf.h1
-rw-r--r--arch/tile/include/asm/processor.h6
-rw-r--r--arch/tile/include/asm/switch_to.h5
-rw-r--r--arch/tile/include/asm/syscalls.h13
-rw-r--r--arch/tile/include/asm/unistd.h2
-rw-r--r--arch/tile/kernel/compat.c4
-rw-r--r--arch/tile/kernel/compat_signal.c10
-rw-r--r--arch/tile/kernel/entry.S11
-rw-r--r--arch/tile/kernel/intvec_32.S29
-rw-r--r--arch/tile/kernel/intvec_64.S30
-rw-r--r--arch/tile/kernel/process.c171
-rw-r--r--arch/tile/kernel/signal.c9
-rw-r--r--arch/tile/kernel/sys.c8
-rw-r--r--arch/tile/mm/fault.c5
-rw-r--r--arch/um/kernel/process.c5
-rw-r--r--arch/um/kernel/syscall.c23
-rw-r--r--arch/unicore32/include/uapi/asm/unistd.h1
-rw-r--r--arch/unicore32/kernel/entry.S6
-rw-r--r--arch/unicore32/kernel/process.c11
-rw-r--r--arch/unicore32/kernel/sys.c14
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/ia32/ia32_aout.c5
-rw-r--r--arch/x86/ia32/ia32entry.S7
-rw-r--r--arch/x86/ia32/sys_ia32.c11
-rw-r--r--arch/x86/include/asm/processor.h2
-rw-r--r--arch/x86/include/asm/signal.h2
-rw-r--r--arch/x86/include/asm/sys_ia32.h2
-rw-r--r--arch/x86/include/asm/syscalls.h9
-rw-r--r--arch/x86/include/asm/unistd.h3
-rw-r--r--arch/x86/kernel/cpu/common.c9
-rw-r--r--arch/x86/kernel/entry_32.S18
-rw-r--r--arch/x86/kernel/entry_64.S22
-rw-r--r--arch/x86/kernel/process.c30
-rw-r--r--arch/x86/kernel/process_32.c12
-rw-r--r--arch/x86/kernel/process_64.c10
-rw-r--r--arch/x86/syscalls/syscall_32.tbl6
-rw-r--r--arch/x86/um/Kconfig1
-rw-r--r--arch/x86/um/shared/sysdep/syscalls.h2
-rw-r--r--arch/x86/um/sys_call_table_32.c3
-rw-r--r--arch/x86/um/syscalls_32.c15
-rw-r--r--arch/xtensa/Kconfig1
-rw-r--r--arch/xtensa/include/asm/signal.h1
-rw-r--r--arch/xtensa/include/asm/syscall.h2
-rw-r--r--arch/xtensa/include/asm/unistd.h1
-rw-r--r--arch/xtensa/include/uapi/asm/unistd.h2
-rw-r--r--arch/xtensa/kernel/process.c12
246 files changed, 1226 insertions, 3912 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index cc74aaea116..34884faf98c 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -342,4 +342,18 @@ config MODULES_USE_ELF_REL
Modules only use ELF REL relocations. Modules with ELF RELA
relocations will give an error.
+#
+# ABI hall of shame
+#
+config CLONE_BACKWARDS
+ bool
+ help
+ Architecture has tls passed as the 4th argument of clone(2),
+ not the 5th one.
+
+config CLONE_BACKWARDS2
+ bool
+ help
+ Architecture has the first two arguments of clone(2) swapped.
+
source "kernel/gcov/Kconfig"
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index b87755a1955..b4c5b2fbb64 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -78,6 +78,7 @@ struct switch_stack {
#define current_pt_regs() \
((struct pt_regs *) ((char *)current_thread_info() + 2*PAGE_SIZE) - 1)
+#define signal_pt_regs current_pt_regs
#define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
diff --git a/arch/alpha/include/asm/signal.h b/arch/alpha/include/asm/signal.h
index a9388300abb..45552862cc1 100644
--- a/arch/alpha/include/asm/signal.h
+++ b/arch/alpha/include/asm/signal.h
@@ -164,9 +164,6 @@ struct sigstack {
#ifdef __KERNEL__
#include <asm/sigcontext.h>
-
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif
#endif
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 7826e227e4d..eb3a4664ced 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -482,6 +482,9 @@
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/* "Conditional" syscalls. What we want is
diff --git a/arch/alpha/kernel/binfmt_loader.c b/arch/alpha/kernel/binfmt_loader.c
index d1f474d1d44..9525660c93c 100644
--- a/arch/alpha/kernel/binfmt_loader.c
+++ b/arch/alpha/kernel/binfmt_loader.c
@@ -5,7 +5,7 @@
#include <linux/binfmts.h>
#include <linux/a.out.h>
-static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_binary(struct linux_binprm *bprm)
{
struct exec *eh = (struct exec *)bprm->buf;
unsigned long loader;
@@ -37,7 +37,7 @@ static int load_binary(struct linux_binprm *bprm, struct pt_regs *regs)
retval = prepare_binprm(bprm);
if (retval < 0)
return retval;
- return search_binary_handler(bprm,regs);
+ return search_binary_handler(bprm);
}
static struct linux_binfmt loader_format = {
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index a7607832dd4..f62a994ef12 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -612,47 +612,24 @@ ret_from_kernel_thread:
* Special system calls. Most of these are special in that they either
* have to play switch_stack games or in some way use the pt_regs struct.
*/
- .align 4
- .globl sys_fork
- .ent sys_fork
-sys_fork:
- .prologue 0
- mov $sp, $21
- bsr $1, do_switch_stack
- bis $31, SIGCHLD, $16
- mov $31, $17
- mov $31, $18
- mov $31, $19
- mov $31, $20
- jsr $26, alpha_clone
- bsr $1, undo_switch_stack
- ret
-.end sys_fork
+.macro fork_like name
.align 4
- .globl sys_clone
- .ent sys_clone
-sys_clone:
+ .globl alpha_\name
+ .ent alpha_\name
+alpha_\name:
.prologue 0
- mov $sp, $21
bsr $1, do_switch_stack
- /* $16, $17, $18, $19, $20 come from the user. */
- jsr $26, alpha_clone
- bsr $1, undo_switch_stack
+ jsr $26, sys_\name
+ ldq $26, 56($sp)
+ lda $sp, SWITCH_STACK_SIZE($sp)
ret
-.end sys_clone
+.end alpha_\name
+.endm
- .align 4
- .globl sys_vfork
- .ent sys_vfork
-sys_vfork:
- .prologue 0
- mov $sp, $16
- bsr $1, do_switch_stack
- jsr $26, alpha_vfork
- bsr $1, undo_switch_stack
- ret
-.end sys_vfork
+fork_like fork
+fork_like vfork
+fork_like clone
.align 4
.globl sys_sigreturn
@@ -661,8 +638,6 @@ sys_sigreturn:
.prologue 0
lda $9, ret_from_straced
cmpult $26, $9, $9
- mov $sp, $17
- lda $18, -SWITCH_STACK_SIZE($sp)
lda $sp, -SWITCH_STACK_SIZE($sp)
jsr $26, do_sigreturn
bne $9, 1f
@@ -678,8 +653,6 @@ sys_rt_sigreturn:
.prologue 0
lda $9, ret_from_straced
cmpult $26, $9, $9
- mov $sp, $17
- lda $18, -SWITCH_STACK_SIZE($sp)
lda $sp, -SWITCH_STACK_SIZE($sp)
jsr $26, do_rt_sigreturn
bne $9, 1f
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 51987dcf79b..b5d0d092369 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -235,51 +235,28 @@ release_thread(struct task_struct *dead_task)
}
/*
- * "alpha_clone()".. By the time we get here, the
- * non-volatile registers have also been saved on the
- * stack. We do some ugly pointer stuff here.. (see
- * also copy_thread)
- *
- * Notice that "fork()" is implemented in terms of clone,
- * with parameters (SIGCHLD, 0).
- */
-int
-alpha_clone(unsigned long clone_flags, unsigned long usp,
- int __user *parent_tid, int __user *child_tid,
- unsigned long tls_value, struct pt_regs *regs)
-{
- if (!usp)
- usp = rdusp();
-
- return do_fork(clone_flags, usp, regs, 0, parent_tid, child_tid);
-}
-
-int
-alpha_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(),
- regs, 0, NULL, NULL);
-}
-
-/*
* Copy an alpha thread..
*/
int
copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long arg,
- struct task_struct * p, struct pt_regs * regs)
+ struct task_struct *p)
{
extern void ret_from_fork(void);
extern void ret_from_kernel_thread(void);
struct thread_info *childti = task_thread_info(p);
struct pt_regs *childregs = task_pt_regs(p);
+ struct pt_regs *regs = current_pt_regs();
struct switch_stack *childstack, *stack;
unsigned long settls;
childstack = ((struct switch_stack *) childregs) - 1;
- if (unlikely(!regs)) {
+ childti->pcb.ksp = (unsigned long) childstack;
+ childti->pcb.flags = 1; /* set FEN, clear everything else */
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
memset(childstack, 0,
sizeof(struct switch_stack) + sizeof(struct pt_regs));
@@ -288,12 +265,17 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
childstack->r10 = arg;
childregs->hae = alpha_mv.hae_cache,
childti->pcb.usp = 0;
- childti->pcb.ksp = (unsigned long) childstack;
- childti->pcb.flags = 1; /* set FEN, clear everything else */
return 0;
}
+ /* Note: if CLONE_SETTLS is not set, then we must inherit the
+ value from the parent, which will have been set by the block
+ copy in dup_task_struct. This is non-intuitive, but is
+ required for proper operation in the case of a threaded
+ application calling fork. */
+ if (clone_flags & CLONE_SETTLS)
+ childti->pcb.unique = regs->r20;
+ childti->pcb.usp = usp ?: rdusp();
*childregs = *regs;
- settls = regs->r20;
childregs->r0 = 0;
childregs->r19 = 0;
childregs->r20 = 1; /* OSF/1 has some strange fork() semantics. */
@@ -301,22 +283,6 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
stack = ((struct switch_stack *) regs) - 1;
*childstack = *stack;
childstack->r26 = (unsigned long) ret_from_fork;
- childti->pcb.usp = usp;
- childti->pcb.ksp = (unsigned long) childstack;
- childti->pcb.flags = 1; /* set FEN, clear everything else */
-
- /* Set a new TLS for the child thread? Peek back into the
- syscall arguments that we saved on syscall entry. Oops,
- except we'd have clobbered it with the parent/child set
- of r20. Read the saved copy. */
- /* Note: if CLONE_SETTLS is not set, then we must inherit the
- value from the parent, which will have been set by the block
- copy in dup_task_struct. This is non-intuitive, but is
- required for proper operation in the case of a threaded
- application calling fork. */
- if (clone_flags & CLONE_SETTLS)
- childti->pcb.unique = settls;
-
return 0;
}
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 32575f85507..336393c9c11 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -160,10 +160,10 @@ extern char compile_time_assert
#define INSN_CALLSYS 0x00000083
static long
-restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
- struct switch_stack *sw)
+restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
{
unsigned long usp;
+ struct switch_stack *sw = (struct switch_stack *)regs - 1;
long i, err = __get_user(regs->pc, &sc->sc_pc);
current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -215,9 +215,9 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
registers and transfer control from userland. */
asmlinkage void
-do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
- struct switch_stack *sw)
+do_sigreturn(struct sigcontext __user *sc)
{
+ struct pt_regs *regs = current_pt_regs();
sigset_t set;
/* Verify that it's a good sigcontext before using it */
@@ -228,7 +228,7 @@ do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
set_current_blocked(&set);
- if (restore_sigcontext(sc, regs, sw))
+ if (restore_sigcontext(sc, regs))
goto give_sigsegv;
/* Send SIGTRAP if we're single-stepping: */
@@ -249,9 +249,9 @@ give_sigsegv:
}
asmlinkage void
-do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
- struct switch_stack *sw)
+do_rt_sigreturn(struct rt_sigframe __user *frame)
{
+ struct pt_regs *regs = current_pt_regs();
sigset_t set;
/* Verify that it's a good ucontext_t before using it */
@@ -262,7 +262,7 @@ do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
set_current_blocked(&set);
- if (restore_sigcontext(&frame->uc.uc_mcontext, regs, sw))
+ if (restore_sigcontext(&frame->uc.uc_mcontext, regs))
goto give_sigsegv;
/* Send SIGTRAP if we're single-stepping: */
diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S
index 2ac6b45c3e0..4284ec798ec 100644
--- a/arch/alpha/kernel/systbls.S
+++ b/arch/alpha/kernel/systbls.S
@@ -12,7 +12,7 @@
sys_call_table:
.quad alpha_ni_syscall /* 0 */
.quad sys_exit
- .quad sys_fork
+ .quad alpha_fork
.quad sys_read
.quad sys_write
.quad alpha_ni_syscall /* 5 */
@@ -76,7 +76,7 @@ sys_call_table:
.quad sys_getpgrp
.quad sys_getpagesize
.quad alpha_ni_syscall /* 65 */
- .quad sys_vfork
+ .quad alpha_vfork
.quad sys_newstat
.quad sys_newlstat
.quad alpha_ni_syscall
@@ -330,7 +330,7 @@ sys_call_table:
.quad sys_ni_syscall /* 309: old get_kernel_syms */
.quad sys_syslog /* 310 */
.quad sys_reboot
- .quad sys_clone
+ .quad alpha_clone
.quad sys_uselib
.quad sys_mlock
.quad sys_munlock /* 315 */
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index d7d7c2fc538..08330d9e6a9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -57,6 +57,7 @@ config ARM
select SYS_SUPPORTS_APM_EMULATION
select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
select MODULES_USE_ELF_REL
+ select CLONE_BACKWARDS
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
diff --git a/arch/arm/include/asm/signal.h b/arch/arm/include/asm/signal.h
index 5a7963dbd3f..9a0ea6ab988 100644
--- a/arch/arm/include/asm/signal.h
+++ b/arch/arm/include/asm/signal.h
@@ -35,5 +35,4 @@ struct k_sigaction {
};
#include <asm/sigcontext.h>
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
#endif
diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index 8f60b6e6bd4..7cd13cc6262 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -42,6 +42,9 @@
#define __ARCH_WANT_SYS_SOCKETCALL
#endif
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 831cd38c8d9..5935b6a02e6 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -11,7 +11,7 @@
*/
/* 0 */ CALL(sys_restart_syscall)
CALL(sys_exit)
- CALL(sys_fork_wrapper)
+ CALL(sys_fork)
CALL(sys_read)
CALL(sys_write)
/* 5 */ CALL(sys_open)
@@ -129,7 +129,7 @@
CALL(OBSOLETE(ABI(sys_ipc, sys_oabi_ipc)))
CALL(sys_fsync)
CALL(sys_sigreturn_wrapper)
-/* 120 */ CALL(sys_clone_wrapper)
+/* 120 */ CALL(sys_clone)
CALL(sys_setdomainname)
CALL(sys_newuname)
CALL(sys_ni_syscall) /* modify_ldt */
@@ -199,7 +199,7 @@
CALL(sys_sendfile)
CALL(sys_ni_syscall) /* getpmsg */
CALL(sys_ni_syscall) /* putpmsg */
-/* 190 */ CALL(sys_vfork_wrapper)
+/* 190 */ CALL(sys_vfork)
CALL(sys_getrlimit)
CALL(sys_mmap2)
CALL(ABI(sys_truncate64, sys_oabi_truncate64))
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 804153c0a9c..a6c301e90a3 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -502,22 +502,6 @@ sys_syscall:
b sys_ni_syscall
ENDPROC(sys_syscall)
-sys_fork_wrapper:
- add r0, sp, #S_OFF
- b sys_fork
-ENDPROC(sys_fork_wrapper)
-
-sys_vfork_wrapper:
- add r0, sp, #S_OFF
- b sys_vfork
-ENDPROC(sys_vfork_wrapper)
-
-sys_clone_wrapper:
- add ip, sp, #S_OFF
- str ip, [sp, #4]
- b sys_clone
-ENDPROC(sys_clone_wrapper)
-
sys_sigreturn_wrapper:
add r0, sp, #S_OFF
mov why, #0 @ prevent syscall restart handling
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 44bc0b327e2..c6dec5fc20a 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -376,17 +376,18 @@ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
int
copy_thread(unsigned long clone_flags, unsigned long stack_start,
- unsigned long stk_sz, struct task_struct *p, struct pt_regs *regs)
+ unsigned long stk_sz, struct task_struct *p)
{
struct thread_info *thread = task_thread_info(p);
struct pt_regs *childregs = task_pt_regs(p);
memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
- if (likely(regs)) {
- *childregs = *regs;
+ if (likely(!(p->flags & PF_KTHREAD))) {
+ *childregs = *current_pt_regs();
childregs->ARM_r0 = 0;
- childregs->ARM_sp = stack_start;
+ if (stack_start)
+ childregs->ARM_sp = stack_start;
} else {
memset(childregs, 0, sizeof(struct pt_regs));
thread->cpu_context.r4 = stk_sz;
@@ -399,7 +400,7 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start,
clear_ptrace_hw_breakpoint(p);
if (clone_flags & CLONE_SETTLS)
- thread->tp_value = regs->ARM_r3;
+ thread->tp_value = childregs->ARM_r3;
thread_notify(THREAD_NOTIFY_COPY, thread);
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index c2a898aa57a..3151f5623d0 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -28,37 +28,6 @@
#include <linux/uaccess.h>
#include <linux/slab.h>
-/* Fork a new task - this creates a new program thread.
- * This is called indirectly via a small wrapper
- */
-asmlinkage int sys_fork(struct pt_regs *regs)
-{
-#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
-#else
- /* can not support in nommu mode */
- return(-EINVAL);
-#endif
-}
-
-/* Clone a task - this clones the calling program thread.
- * This is called indirectly via a small wrapper
- */
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tidptr, int tls_val,
- int __user *child_tidptr, struct pt_regs *regs)
-{
- if (!newsp)
- newsp = regs->ARM_sp;
-
- return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
-}
-
-asmlinkage int sys_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL);
-}
-
/*
* Since loff_t is a 64 bit type we avoid a lot of ABI hassle
* with a different argument ordering.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 2adf340b858..f9ccff91591 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -33,6 +33,7 @@ config ARM64
select RTC_LIB
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
+ select CLONE_BACKWARDS
help
ARM 64-bit (AArch64) Linux support.
diff --git a/arch/arm64/include/asm/syscalls.h b/arch/arm64/include/asm/syscalls.h
index a1b00cd6f78..20d63b29066 100644
--- a/arch/arm64/include/asm/syscalls.h
+++ b/arch/arm64/include/asm/syscalls.h
@@ -27,12 +27,6 @@ asmlinkage long sys_rt_sigreturn_wrapper(void);
asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss,
stack_t __user *uoss);
-/*
- * AArch64 sys_clone implementation has a different prototype than the generic
- * one (additional TLS value argument).
- */
-#define sys_clone sys_clone
-
#include <asm-generic/syscalls.h>
#endif /* __ASM_SYSCALLS_H */
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 43064a8bd99..d69aeea6da1 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -24,6 +24,9 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
#endif
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
#include <uapi/asm/unistd.h>
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 50104e8ce55..58432625fdb 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -23,7 +23,7 @@
__SYSCALL(0, sys_restart_syscall)
__SYSCALL(1, sys_exit)
-__SYSCALL(2, compat_sys_fork)
+__SYSCALL(2, sys_fork)
__SYSCALL(3, sys_read)
__SYSCALL(4, sys_write)
__SYSCALL(5, compat_sys_open)
@@ -211,7 +211,7 @@ __SYSCALL(186, compat_sys_sigaltstack_wrapper)
__SYSCALL(187, compat_sys_sendfile)
__SYSCALL(188, sys_ni_syscall) /* 188 reserved */
__SYSCALL(189, sys_ni_syscall) /* 189 reserved */
-__SYSCALL(190, compat_sys_vfork)
+__SYSCALL(190, sys_vfork)
__SYSCALL(191, compat_sys_getrlimit) /* SuS compliant getrlimit */
__SYSCALL(192, sys_mmap_pgoff)
__SYSCALL(193, compat_sys_truncate64_wrapper)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 8a5f3341861..cb0956bc96e 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -234,16 +234,15 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
asmlinkage void ret_from_fork(void) asm("ret_from_fork");
int copy_thread(unsigned long clone_flags, unsigned long stack_start,
- unsigned long stk_sz, struct task_struct *p,
- struct pt_regs *regs)
+ unsigned long stk_sz, struct task_struct *p)
{
struct pt_regs *childregs = task_pt_regs(p);
unsigned long tls = p->thread.tp_value;
memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
- if (likely(regs)) {
- *childregs = *regs;
+ if (likely(!(p->flags & PF_KTHREAD))) {
+ *childregs = *current_pt_regs();
childregs->regs[0] = 0;
if (is_compat_thread(task_thread_info(p))) {
if (stack_start)
@@ -266,7 +265,7 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start,
* for the new thread.
*/
if (clone_flags & CLONE_SETTLS)
- tls = regs->regs[3];
+ tls = childregs->regs[3];
} else {
memset(childregs, 0, sizeof(struct pt_regs));
childregs->pstate = PSR_MODE_EL1h;
diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c
index 4364df85050..8292a9b090f 100644
--- a/arch/arm64/kernel/sys.c
+++ b/arch/arm64/kernel/sys.c
@@ -26,17 +26,6 @@
#include <linux/slab.h>
#include <linux/syscalls.h>
-/*
- * Clone a task - this clones the calling program thread.
- */
-asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tidptr, unsigned long tls_val,
- int __user *child_tidptr)
-{
- return do_fork(clone_flags, newsp, current_pt_regs(), 0,
- parent_tidptr, child_tidptr);
-}
-
asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, off_t off)
diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c
index 6fabc1912da..f7b05edf8ce 100644
--- a/arch/arm64/kernel/sys_compat.c
+++ b/arch/arm64/kernel/sys_compat.c
@@ -28,17 +28,6 @@
#include <asm/cacheflush.h>
#include <asm/unistd32.h>
-asmlinkage int compat_sys_fork(void)
-{
- return do_fork(SIGCHLD, 0, current_pt_regs(), 0, NULL, NULL);
-}
-
-asmlinkage int compat_sys_vfork(void)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0,
- current_pt_regs(), 0, NULL, NULL);
-}
-
asmlinkage int compat_sys_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec __user *interval)
{
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index c2bbc9a7222..202d71a15be 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -17,6 +17,8 @@ config AVR32
select GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h
index 87d8baccc60..48d71c5c898 100644
--- a/arch/avr32/include/asm/processor.h
+++ b/arch/avr32/include/asm/processor.h
@@ -142,9 +142,6 @@ struct task_struct;
/* Free all resources held by a thread */
extern void release_thread(struct task_struct *);
-/* Create a kernel thread without removing it from tasklists */
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
/* Return saved PC of a blocked thread */
#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
diff --git a/arch/avr32/include/asm/signal.h b/arch/avr32/include/asm/signal.h
index 4d502fd6bad..9326d182e9e 100644
--- a/arch/avr32/include/asm/signal.h
+++ b/arch/avr32/include/asm/signal.h
@@ -37,6 +37,4 @@ struct k_sigaction {
#include <asm/sigcontext.h>
#undef __HAVE_ARCH_SIG_BITOPS
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif
diff --git a/arch/avr32/include/asm/unistd.h b/arch/avr32/include/asm/unistd.h
index 157b4bd3d5e..f05a9804e8e 100644
--- a/arch/avr32/include/asm/unistd.h
+++ b/arch/avr32/include/asm/unistd.h
@@ -39,6 +39,10 @@
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/avr32/kernel/Makefile b/arch/avr32/kernel/Makefile
index 9e2c465ef3a..119a2e41def 100644
--- a/arch/avr32/kernel/Makefile
+++ b/arch/avr32/kernel/Makefile
@@ -7,7 +7,7 @@ extra-y := head.o vmlinux.lds
obj-$(CONFIG_SUBARCH_AVR32B) += entry-avr32b.o
obj-y += syscall_table.o syscall-stubs.o irq.o
obj-y += setup.o traps.o ocd.o ptrace.o
-obj-y += signal.o sys_avr32.o process.o time.o
+obj-y += signal.o process.o time.o
obj-y += switch_to.o cpu.o
obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o
obj-$(CONFIG_KPROBES) += kprobes.o
diff --git a/arch/avr32/kernel/entry-avr32b.S b/arch/avr32/kernel/entry-avr32b.S
index df288418131..9899d3cc6f0 100644
--- a/arch/avr32/kernel/entry-avr32b.S
+++ b/arch/avr32/kernel/entry-avr32b.S
@@ -251,13 +251,15 @@ syscall_badsys:
.global ret_from_fork
ret_from_fork:
call schedule_tail
+ mov r12, 0
+ rjmp syscall_return
- /* check for syscall tracing */
- get_thread_info r0
- ld.w r1, r0[TI_flags]
- andl r1, _TIF_ALLWORK_MASK, COH
- brne syscall_exit_work
- rjmp syscall_exit_cont
+ .global ret_from_kernel_thread
+ret_from_kernel_thread:
+ call schedule_tail
+ mov r12, r0
+ mov lr, r2 /* syscall_return */
+ mov pc, r1
syscall_trace_enter:
pushm r8-r12
diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index 1bb0a8abd79..fd78f58ea79 100644
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c
@@ -69,44 +69,6 @@ void machine_restart(char *cmd)
}
/*
- * PC is actually discarded when returning from a system call -- the
- * return address must be stored in LR. This function will make sure
- * LR points to do_exit before starting the thread.
- *
- * Also, when returning from fork(), r12 is 0, so we must copy the
- * argument as well.
- *
- * r0 : The argument to the main thread function
- * r1 : The address of do_exit
- * r2 : The address of the main thread function
- */
-asmlinkage extern void kernel_thread_helper(void);
-__asm__(" .type kernel_thread_helper, @function\n"
- "kernel_thread_helper:\n"
- " mov r12, r0\n"
- " mov lr, r2\n"
- " mov pc, r1\n"
- " .size kernel_thread_helper, . - kernel_thread_helper");
-
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.r0 = (unsigned long)arg;
- regs.r1 = (unsigned long)fn;
- regs.r2 = (unsigned long)do_exit;
- regs.lr = (unsigned long)kernel_thread_helper;
- regs.pc = (unsigned long)kernel_thread_helper;
- regs.sr = MODE_SUPERVISOR;
-
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED,
- 0, &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
* Free current thread data structures etc
*/
void exit_thread(void)
@@ -332,26 +294,32 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
}
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
+asmlinkage void syscall_return(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg,
+ struct task_struct *p)
{
- struct pt_regs *childregs;
-
- childregs = ((struct pt_regs *)(THREAD_SIZE + (unsigned long)task_stack_page(p))) - 1;
- *childregs = *regs;
-
- if (user_mode(regs))
- childregs->sp = usp;
- else
- childregs->sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
-
- childregs->r12 = 0; /* Set return value for child */
+ struct pt_regs *childregs = task_pt_regs(p);
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ p->thread.cpu_context.r0 = arg;
+ p->thread.cpu_context.r1 = usp; /* fn */
+ p->thread.cpu_context.r2 = syscall_return;
+ p->thread.cpu_context.pc = (unsigned long)ret_from_kernel_thread;
+ childregs->sr = MODE_SUPERVISOR;
+ } else {
+ *childregs = *current_pt_regs();
+ if (usp)
+ childregs->sp = usp;
+ childregs->r12 = 0; /* Set return value for child */
+ p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
+ }
p->thread.cpu_context.sr = MODE_SUPERVISOR | SR_GM;
p->thread.cpu_context.ksp = (unsigned long)childregs;
- p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
clear_tsk_thread_flag(p, TIF_DEBUG);
if ((clone_flags & CLONE_PTRACE) && test_thread_flag(TIF_DEBUG))
@@ -360,49 +328,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
-/* r12-r8 are dummy parameters to force the compiler to use the stack */
-asmlinkage int sys_fork(struct pt_regs *regs)
-{
- return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tidptr, void __user *child_tidptr,
- struct pt_regs *regs)
-{
- if (!newsp)
- newsp = regs->sp;
- return do_fork(clone_flags, newsp, regs, 0, parent_tidptr,
- child_tidptr);
-}
-
-asmlinkage int sys_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs,
- 0, NULL, NULL);
-}
-
-asmlinkage int sys_execve(const char __user *ufilename,
- const char __user *const __user *uargv,
- const char __user *const __user *uenvp,
- struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(ufilename);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name, uargv, uenvp, regs);
- putname(filename);
-
-out:
- return error;
-}
-
-
/*
* This function is supposed to answer the question "who called
* schedule()?"
diff --git a/arch/avr32/kernel/sys_avr32.c b/arch/avr32/kernel/sys_avr32.c
deleted file mode 100644
index 62635a09ae3..00000000000
--- a/arch/avr32/kernel/sys_avr32.c
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/unistd.h>
-
-int kernel_execve(const char *file,
- const char *const *argv,
- const char *const *envp)
-{
- register long scno asm("r8") = __NR_execve;
- register long sc1 asm("r12") = (long)file;
- register long sc2 asm("r11") = (long)argv;
- register long sc3 asm("r10") = (long)envp;
-
- asm volatile("scall"
- : "=r"(sc1)
- : "r"(scno), "0"(sc1), "r"(sc2), "r"(sc3)
- : "cc", "memory");
- return sc1;
-}
diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
index 0447a3e2ba6..275aab9731f 100644
--- a/arch/avr32/kernel/syscall-stubs.S
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -32,30 +32,6 @@ __sys_rt_sigreturn:
mov r12, sp
rjmp sys_rt_sigreturn
- .global __sys_fork
- .type __sys_fork,@function
-__sys_fork:
- mov r12, sp
- rjmp sys_fork
-
- .global __sys_clone
- .type __sys_clone,@function
-__sys_clone:
- mov r8, sp
- rjmp sys_clone
-
- .global __sys_vfork
- .type __sys_vfork,@function
-__sys_vfork:
- mov r12, sp
- rjmp sys_vfork
-
- .global __sys_execve
- .type __sys_execve,@function
-__sys_execve:
- mov r9, sp
- rjmp sys_execve
-
.global __sys_mmap2
.type __sys_mmap2,@function
__sys_mmap2:
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
index 6eba53530d1..f27bb878da6 100644
--- a/arch/avr32/kernel/syscall_table.S
+++ b/arch/avr32/kernel/syscall_table.S
@@ -15,7 +15,7 @@
sys_call_table:
.long sys_restart_syscall
.long sys_exit
- .long __sys_fork
+ .long sys_fork
.long sys_read
.long sys_write
.long sys_open /* 5 */
@@ -24,7 +24,7 @@ sys_call_table:
.long sys_creat
.long sys_link
.long sys_unlink /* 10 */
- .long __sys_execve
+ .long sys_execve
.long sys_chdir
.long sys_time
.long sys_mknod
@@ -57,7 +57,7 @@ sys_call_table:
.long sys_dup
.long sys_pipe
.long sys_times
- .long __sys_clone
+ .long sys_clone
.long sys_brk /* 45 */
.long sys_setgid
.long sys_getgid
@@ -127,7 +127,7 @@ sys_call_table:
.long sys_newuname
.long sys_adjtimex
.long sys_mprotect
- .long __sys_vfork
+ .long sys_vfork
.long sys_init_module /* 115 */
.long sys_delete_module
.long sys_quotactl
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index b6f3ad5441c..ab9ff4075f4 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -45,6 +45,8 @@ config BLACKFIN
select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config GENERIC_CSUM
def_bool y
diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h
index 4ef7cfe43ce..d0e72e9475a 100644
--- a/arch/blackfin/include/asm/processor.h
+++ b/arch/blackfin/include/asm/processor.h
@@ -75,8 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
-
/*
* Free current thread data structures etc..
*/
diff --git a/arch/blackfin/include/asm/unistd.h b/arch/blackfin/include/asm/unistd.h
index 5b2a0748d7d..460514a1a4e 100644
--- a/arch/blackfin/include/asm/unistd.h
+++ b/arch/blackfin/include/asm/unistd.h
@@ -446,6 +446,8 @@
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_VFORK
/*
* "Conditional" syscalls
diff --git a/arch/blackfin/kernel/entry.S b/arch/blackfin/kernel/entry.S
index f33792cc1a0..4071265fc4f 100644
--- a/arch/blackfin/kernel/entry.S
+++ b/arch/blackfin/kernel/entry.S
@@ -46,53 +46,14 @@ ENTRY(_ret_from_fork)
SP += -12;
pseudo_long_call _schedule_tail, p5;
SP += 12;
- r0 = [sp + PT_IPEND];
- cc = bittst(r0,1);
- if cc jump .Lin_kernel;
+ p1 = [sp++];
+ r0 = [sp++];
+ cc = p1 == 0;
+ if cc jump .Lfork;
+ sp += -12;
+ call (p1);
+ sp += 12;
+.Lfork:
RESTORE_CONTEXT
rti;
-.Lin_kernel:
- bitclr(r0,1);
- [sp + PT_IPEND] = r0;
- /* do a 'fake' RTI by jumping to [RETI]
- * to avoid clearing supervisor mode in child
- */
- r0 = [sp + PT_PC];
- [sp + PT_P0] = r0;
-
- RESTORE_ALL_SYS
- jump (p0);
ENDPROC(_ret_from_fork)
-
-ENTRY(_sys_vfork)
- r0 = sp;
- r0 += 24;
- [--sp] = rets;
- SP += -12;
- pseudo_long_call _bfin_vfork, p2;
- SP += 12;
- rets = [sp++];
- rts;
-ENDPROC(_sys_vfork)
-
-ENTRY(_sys_clone)
- r0 = sp;
- r0 += 24;
- [--sp] = rets;
- SP += -12;
- pseudo_long_call _bfin_clone, p2;
- SP += 12;
- rets = [sp++];
- rts;
-ENDPROC(_sys_clone)
-
-ENTRY(_sys_rt_sigreturn)
- r0 = sp;
- r0 += 24;
- [--sp] = rets;
- SP += -12;
- pseudo_long_call _do_rt_sigreturn, p2;
- SP += 12;
- rets = [sp++];
- rts;
-ENDPROC(_sys_rt_sigreturn)
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index bb1cc721fcf..3e16ad9b0a9 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -102,40 +102,6 @@ void cpu_idle(void)
}
/*
- * This gets run with P1 containing the
- * function to call, and R1 containing
- * the "args". Note P0 is clobbered on the way here.
- */
-void kernel_thread_helper(void);
-__asm__(".section .text\n"
- ".align 4\n"
- "_kernel_thread_helper:\n\t"
- "\tsp += -12;\n\t"
- "\tr0 = r1;\n\t" "\tcall (p1);\n\t" "\tcall _do_exit;\n" ".previous");
-
-/*
- * Create a kernel thread.
- */
-pid_t kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.r1 = (unsigned long)arg;
- regs.p1 = (unsigned long)fn;
- regs.pc = (unsigned long)kernel_thread_helper;
- regs.orig_p0 = -1;
- /* Set bit 2 to tell ret_from_fork we should be returning to kernel
- mode. */
- regs.ipend = 0x8002;
- __asm__ __volatile__("%0 = syscfg;":"=da"(regs.syscfg):);
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
- NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
* Do necessary setup to start up a newly executed thread.
*
* pass the data segment into user programs if it exists,
@@ -161,70 +127,48 @@ void flush_thread(void)
{
}
-asmlinkage int bfin_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL,
- NULL);
-}
-
-asmlinkage int bfin_clone(struct pt_regs *regs)
+asmlinkage int bfin_clone(unsigned long clone_flags, unsigned long newsp)
{
- unsigned long clone_flags;
- unsigned long newsp;
-
#ifdef __ARCH_SYNC_CORE_DCACHE
if (current->nr_cpus_allowed == num_possible_cpus())
set_cpus_allowed_ptr(current, cpumask_of(smp_processor_id()));
#endif
-
- /* syscall2 puts clone_flags in r0 and usp in r1 */
- clone_flags = regs->r0;
- newsp = regs->r1;
- if (!newsp)
- newsp = rdusp();
- else
+ if (newsp)
newsp -= 12;
- return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
+ return do_fork(clone_flags, newsp, 0, NULL, NULL);
}
int
copy_thread(unsigned long clone_flags,
unsigned long usp, unsigned long topstk,
- struct task_struct *p, struct pt_regs *regs)
+ struct task_struct *p)
{
struct pt_regs *childregs;
+ unsigned long *v;
childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
- *childregs = *regs;
- childregs->r0 = 0;
+ v = ((unsigned long *)childregs) - 2;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ v[0] = usp;
+ v[1] = topstk;
+ childregs->orig_p0 = -1;
+ childregs->ipend = 0x8000;
+ __asm__ __volatile__("%0 = syscfg;":"=da"(childregs->syscfg):);
+ p->thread.usp = 0;
+ } else {
+ *childregs = *current_pt_regs();
+ childregs->r0 = 0;
+ p->thread.usp = usp ? : rdusp();
+ v[0] = v[1] = 0;
+ }
- p->thread.usp = usp;
- p->thread.ksp = (unsigned long)childregs;
+ p->thread.ksp = (unsigned long)v;
p->thread.pc = (unsigned long)ret_from_fork;
return 0;
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char __user *name,
- const char __user *const __user *argv,
- const char __user *const __user *envp)
-{
- int error;
- struct filename *filename;
- struct pt_regs *regs = (struct pt_regs *)((&name) + 6);
-
- filename = getname(name);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- return error;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, pc;
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index 6ed20a1a4af..84b4be05840 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -82,9 +82,9 @@ rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *p
return err;
}
-asmlinkage int do_rt_sigreturn(unsigned long __unused)
+asmlinkage int sys_rt_sigreturn(void)
{
- struct pt_regs *regs = (struct pt_regs *)__unused;
+ struct pt_regs *regs = current_pt_regs();
unsigned long usp = rdusp();
struct rt_sigframe *frame = (struct rt_sigframe *)(usp);
sigset_t set;
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index 1c3d2c5bb0b..86b5a095c5a 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -530,61 +530,6 @@ ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
jump .Lsyscall_really_exit;
ENDPROC(_trap)
-ENTRY(_kernel_execve)
- link SIZEOF_PTREGS;
- p0 = sp;
- r3 = SIZEOF_PTREGS / 4;
- r4 = 0(x);
-.Lclear_regs:
- [p0++] = r4;
- r3 += -1;
- cc = r3 == 0;
- if !cc jump .Lclear_regs (bp);
-
- p0 = sp;
- sp += -16;
- [sp + 12] = p0;
- pseudo_long_call _do_execve, p5;
- SP += 16;
- cc = r0 == 0;
- if ! cc jump .Lexecve_failed;
- /* Success. Copy our temporary pt_regs to the top of the kernel
- * stack and do a normal exception return.
- */
- r1 = sp;
- r0 = (-KERNEL_STACK_SIZE) (x);
- r1 = r1 & r0;
- p2 = r1;
- p3 = [p2];
- r0 = KERNEL_STACK_SIZE - 4 (z);
- p1 = r0;
- p1 = p1 + p2;
-
- p0 = fp;
- r4 = [p0--];
- r3 = SIZEOF_PTREGS / 4;
-.Lcopy_regs:
- r4 = [p0--];
- [p1--] = r4;
- r3 += -1;
- cc = r3 == 0;
- if ! cc jump .Lcopy_regs (bp);
-
- r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z);
- p1 = r0;
- p1 = p1 + p2;
- sp = p1;
- r0 = syscfg;
- [SP + PT_SYSCFG] = r0;
- [p3 + (TASK_THREAD + THREAD_KSP)] = sp;
-
- RESTORE_CONTEXT;
- rti;
-.Lexecve_failed:
- unlink;
- rts;
-ENDPROC(_kernel_execve)
-
ENTRY(_system_call)
/* Store IPEND */
p2.l = lo(IPEND);
@@ -1486,7 +1431,7 @@ ENTRY(_sys_call_table)
.long _sys_ni_syscall /* old sys_ipc */
.long _sys_fsync
.long _sys_ni_syscall /* old sys_sigreturn */
- .long _sys_clone /* 120 */
+ .long _bfin_clone /* 120 */
.long _sys_setdomainname
.long _sys_newuname
.long _sys_ni_syscall /* old sys_modify_ldt */
diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index aee1b569ee6..66eab3703c7 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -18,6 +18,7 @@ config C6X
select OF_EARLY_FLATTREE
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
select MODULES_USE_ELF_RELA
config MMU
diff --git a/arch/c6x/include/asm/syscalls.h b/arch/c6x/include/asm/syscalls.h
index e7b8991dc07..df3d05feb15 100644
--- a/arch/c6x/include/asm/syscalls.h
+++ b/arch/c6x/include/asm/syscalls.h
@@ -41,10 +41,6 @@ extern long sys_fallocate_c6x(int fd, int mode,
u32 len_lo, u32 len_hi);
extern int sys_cache_sync(unsigned long s, unsigned long e);
-struct pt_regs;
-
-extern asmlinkage long sys_c6x_clone(struct pt_regs *regs);
-
#include <asm-generic/syscalls.h>
#endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/arch/c6x/include/uapi/asm/unistd.h b/arch/c6x/include/uapi/asm/unistd.h
index 4ff747d12da..f3987a8703d 100644
--- a/arch/c6x/include/uapi/asm/unistd.h
+++ b/arch/c6x/include/uapi/asm/unistd.h
@@ -14,8 +14,8 @@
* more details.
*/
-#define __ARCH_WANT_KERNEL_EXECVE
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
/* Use the standard ABI for syscalls. */
#include <asm-generic/unistd.h>
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
index 0ed6157dd25..5239057de4c 100644
--- a/arch/c6x/kernel/entry.S
+++ b/arch/c6x/kernel/entry.S
@@ -415,19 +415,9 @@ ENTRY(ret_from_kernel_thread)
0:
B .S2 B10 /* call fn */
LDW .D2T1 *+SP(REGS_A1+8),A4 /* get arg */
- MVKL .S2 sys_exit,B11
- MVKH .S2 sys_exit,B11
- ADDKPC .S2 0f,B3,1
-0:
- BNOP .S2 B11,5 /* jump to sys_exit */
+ ADDKPC .S2 ret_from_fork_2,B3,3
ENDPROC(ret_from_kernel_thread)
-ENTRY(ret_from_kernel_execve)
- GET_THREAD_INFO A12
- BNOP .S2 syscall_exit,4
- ADD .D2X A4,-8,SP
-ENDPROC(ret_from_kernel_execve)
-
;;
;; These are the interrupt handlers, responsible for calling c6x_do_IRQ()
;;
@@ -624,18 +614,6 @@ ENDPROC(sys_sigaltstack)
;; Special system calls
;; return address is in B3
;;
-ENTRY(sys_clone)
- ADD .D1X SP,8,A4
-#ifdef CONFIG_C6X_BIG_KERNEL
- || MVKL .S1 sys_c6x_clone,A0
- MVKH .S1 sys_c6x_clone,A0
- BNOP .S2X A0,5
-#else
- || B .S2 sys_c6x_clone
- NOP 5
-#endif
-ENDPROC(sys_clone)
-
ENTRY(sys_rt_sigreturn)
ADD .D1X SP,8,A4
#ifdef CONFIG_C6X_BIG_KERNEL
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
index 2770d9a9a84..6434df476f7 100644
--- a/arch/c6x/kernel/process.c
+++ b/arch/c6x/kernel/process.c
@@ -112,22 +112,6 @@ void exit_thread(void)
{
}
-SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
-
- /* syscall puts clone_flags in A4 and usp in B4 */
- clone_flags = regs->orig_a4;
- if (regs->b4)
- newsp = regs->b4;
- else
- newsp = regs->sp;
-
- return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6,
- (int __user *)regs->b6);
-}
-
/*
* Do necessary setup to start up a newly executed thread.
*/
@@ -155,13 +139,13 @@ void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp)
*/
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long ustk_size,
- struct task_struct *p, struct pt_regs *regs)
+ struct task_struct *p)
{
struct pt_regs *childregs;
childregs = task_pt_regs(p);
- if (!regs) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* case of __kernel_thread: we return to supervisor space */
memset(childregs, 0, sizeof(struct pt_regs));
childregs->sp = (unsigned long)(childregs + 1);
@@ -170,8 +154,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs->a1 = ustk_size; /* argument */
} else {
/* Otherwise use the given stack */
- *childregs = *regs;
- childregs->sp = usp;
+ *childregs = *current_pt_regs();
+ if (usp)
+ childregs->sp = usp;
p->thread.pc = (unsigned long) ret_from_fork;
}
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index a67244473a3..0cac6a49f23 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -49,6 +49,9 @@ config CRIS
select GENERIC_SMP_IDLE_THREAD if ETRAX_ARCH_V32
select GENERIC_CMOS_UPDATE
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
+ select CLONE_BACKWARDS2
config HZ
int
diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S
index 592fbe9dfb6..897bba67bf7 100644
--- a/arch/cris/arch-v10/kernel/entry.S
+++ b/arch/cris/arch-v10/kernel/entry.S
@@ -35,6 +35,7 @@
.globl system_call
.globl ret_from_intr
.globl ret_from_fork
+ .globl ret_from_kernel_thread
.globl resume
.globl multiple_interrupt
.globl hwbreakpoint
@@ -81,7 +82,14 @@ ret_from_fork:
jsr schedule_tail
ba ret_from_sys_call
nop
-
+
+ret_from_kernel_thread:
+ jsr schedule_tail
+ move.d $r2, $r10 ; argument is here
+ jsr $r1 ; call the payload
+ moveq 0, $r9 ; no syscall restarts, TYVM...
+ ba ret_from_sys_call
+
ret_from_intr:
;; check for resched if preemptive kernel or if we're going back to user-mode
;; this test matches the user_regs(regs) macro
@@ -586,13 +594,6 @@ _ugdb_handle_breakpoint:
ba do_sigtrap ; SIGTRAP the offending process.
pop $dccr ; Restore dccr in delay slot.
- .global kernel_execve
-kernel_execve:
- move.d __NR_execve, $r9
- break 13
- ret
- nop
-
.data
hw_bp_trigs:
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index 15ac7150371..b1018750cff 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c
@@ -17,6 +17,7 @@
#include <arch/svinto.h>
#include <linux/init.h>
#include <arch/system.h>
+#include <linux/ptrace.h>
#ifdef CONFIG_ETRAX_GPIO
void etrax_gpio_wake_up_check(void); /* drivers/gpio.c */
@@ -81,31 +82,6 @@ unsigned long thread_saved_pc(struct task_struct *t)
return task_pt_regs(t)->irp;
}
-static void kernel_thread_helper(void* dummy, int (*fn)(void *), void * arg)
-{
- fn(arg);
- do_exit(-1); /* Should never be called, return bad exit value */
-}
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- /* Don't use r10 since that is set to 0 in copy_thread */
- regs.r11 = (unsigned long)fn;
- regs.r12 = (unsigned long)arg;
- regs.irp = (unsigned long)kernel_thread_helper;
- regs.dccr = 1 << I_DCCR_BITNR;
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-
/* setup the child's kernel stack with a pt_regs and switch_stack on it.
* it will be un-nested during _resume and _ret_from_sys_call when the
* new thread is scheduled.
@@ -115,29 +91,34 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
*
*/
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs * childregs;
- struct switch_stack *swstack;
+ struct pt_regs *childregs = task_pt_regs(p);
+ struct switch_stack *swstack = ((struct switch_stack *)childregs) - 1;
/* put the pt_regs structure at the end of the new kernel stack page and fix it up
* remember that the task_struct doubles as the kernel stack for the task
*/
- childregs = task_pt_regs(p);
-
- *childregs = *regs; /* struct copy of pt_regs */
-
- p->set_child_tid = p->clear_child_tid = NULL;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(swstack, 0,
+ sizeof(struct switch_stack) + sizeof(struct pt_regs));
+ swstack->r1 = usp;
+ swstack->r2 = arg;
+ childregs->dccr = 1 << I_DCCR_BITNR;
+ swstack->return_ip = (unsigned long) ret_from_kernel_thread;
+ p->thread.ksp = (unsigned long) swstack;
+ p->thread.usp = 0;
+ return 0;
+ }
+ *childregs = *current_pt_regs(); /* struct copy of pt_regs */
childregs->r10 = 0; /* child returns 0 after a fork/clone */
-
- /* put the switch stack right below the pt_regs */
- swstack = ((struct switch_stack *)childregs) - 1;
+ /* put the switch stack right below the pt_regs */
swstack->r9 = 0; /* parameter to ret_from_sys_call, 0 == dont restart the syscall */
@@ -147,7 +128,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
/* fix the user-mode stackpointer */
- p->thread.usp = usp;
+ p->thread.usp = usp ?: rdusp();
/* and the kernel-mode one */
@@ -161,70 +142,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
-/*
- * Be aware of the "magic" 7th argument in the four system-calls below.
- * They need the latest stackframe, which is put as the 7th argument by
- * entry.S. The previous arguments are dummies or actually used, but need
- * to be defined to reach the 7th argument.
- *
- * N.B.: Another method to get the stackframe is to use current_regs(). But
- * it returns the latest stack-frame stacked when going from _user mode_ and
- * some of these (at least sys_clone) are called from kernel-mode sometimes
- * (for example during kernel_thread, above) and thus cannot use it. Thus,
- * to be sure not to get any surprises, we use the method for the other calls
- * as well.
- */
-
-asmlinkage int sys_fork(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-/* if newusp is 0, we just grab the old usp */
-/* FIXME: Is parent_tid/child_tid really third/fourth argument? Update lib? */
-asmlinkage int sys_clone(unsigned long newusp, unsigned long flags,
- int* parent_tid, int* child_tid, long mof, long srp,
- struct pt_regs *regs)
-{
- if (!newusp)
- newusp = rdusp();
- return do_fork(flags, newusp, regs, 0, parent_tid, child_tid);
-}
-
-/* vfork is a system call in i386 because of register-pressure - maybe
- * we can remove it and handle it in libc but we put it here until then.
- */
-
-asmlinkage int sys_vfork(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char *fname,
- const char *const *argv,
- const char *const *envp,
- long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(fname);
- error = PTR_ERR(filename);
-
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
- out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
#if 0
diff --git a/arch/cris/arch-v32/kernel/entry.S b/arch/cris/arch-v32/kernel/entry.S
index c3ea4694fba..faa644111fe 100644
--- a/arch/cris/arch-v32/kernel/entry.S
+++ b/arch/cris/arch-v32/kernel/entry.S
@@ -31,6 +31,7 @@
.globl system_call
.globl ret_from_intr
.globl ret_from_fork
+ .globl ret_from_kernel_thread
.globl resume
.globl multiple_interrupt
.globl nmi_interrupt
@@ -84,6 +85,18 @@ ret_from_fork:
nop
.size ret_from_fork, . - ret_from_fork
+ .type ret_from_kernel_thread,@function
+ret_from_kernel_thread:
+ jsr schedule_tail
+ nop
+ move.d $r2, $r10
+ jsr $r1
+ nop
+ moveq 0, $r9 ; no syscall restarts, TYVM...
+ ba ret_from_sys_call
+ nop
+ .size ret_from_kernel_thread, . - ret_from_kernel_thread
+
.type ret_from_intr,@function
ret_from_intr:
;; Check for resched if preemptive kernel, or if we're going back to
@@ -531,15 +544,6 @@ _ugdb_handle_exception:
ba do_sigtrap ; SIGTRAP the offending process.
move.d [$sp+], $r0 ; Restore R0 in delay slot.
- .global kernel_execve
- .type kernel_execve,@function
-kernel_execve:
- move.d __NR_execve, $r9
- break 13
- ret
- nop
- .size kernel_execve, . - kernel_execve
-
.data
.section .rodata,"a"
diff --git a/arch/cris/arch-v32/kernel/process.c b/arch/cris/arch-v32/kernel/process.c
index 4e999224635..2b23ef0e445 100644
--- a/arch/cris/arch-v32/kernel/process.c
+++ b/arch/cris/arch-v32/kernel/process.c
@@ -16,6 +16,7 @@
#include <hwregs/reg_map.h>
#include <hwregs/timer_defs.h>
#include <hwregs/intr_vect_defs.h>
+#include <linux/ptrace.h>
extern void stop_watchdog(void);
@@ -94,31 +95,6 @@ unsigned long thread_saved_pc(struct task_struct *t)
return task_pt_regs(t)->erp;
}
-static void
-kernel_thread_helper(void* dummy, int (*fn)(void *), void * arg)
-{
- fn(arg);
- do_exit(-1); /* Should never be called, return bad exit value. */
-}
-
-/* Create a kernel thread. */
-int
-kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- /* Don't use r10 since that is set to 0 in copy_thread. */
- regs.r11 = (unsigned long) fn;
- regs.r12 = (unsigned long) arg;
- regs.erp = (unsigned long) kernel_thread_helper;
- regs.ccs = 1 << (I_CCS_BITNR + CCS_SHIFT);
-
- /* Create the new process. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-
/*
* Setup the child's kernel stack with a pt_regs and call switch_stack() on it.
* It will be unnested during _resume and _ret_from_sys_call when the new thread
@@ -129,34 +105,42 @@ kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
*/
extern asmlinkage void ret_from_fork(void);
+extern asmlinkage void ret_from_kernel_thread(void);
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs *childregs;
- struct switch_stack *swstack;
+ struct pt_regs *childregs = task_pt_regs(p);
+ struct switch_stack *swstack = ((struct switch_stack *) childregs) - 1;
/*
* Put the pt_regs structure at the end of the new kernel stack page and
* fix it up. Note: the task_struct doubles as the kernel stack for the
* task.
*/
- childregs = task_pt_regs(p);
- *childregs = *regs; /* Struct copy of pt_regs. */
- p->set_child_tid = p->clear_child_tid = NULL;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(swstack, 0,
+ sizeof(struct switch_stack) + sizeof(struct pt_regs));
+ swstack->r1 = usp;
+ swstack->r2 = arg;
+ childregs->ccs = 1 << (I_CCS_BITNR + CCS_SHIFT);
+ swstack->return_ip = (unsigned long) ret_from_kernel_thread;
+ p->thread.ksp = (unsigned long) swstack;
+ p->thread.usp = 0;
+ return 0;
+ }
+ *childregs = *current_pt_regs(); /* Struct copy of pt_regs. */
childregs->r10 = 0; /* Child returns 0 after a fork/clone. */
/* Set a new TLS ?
* The TLS is in $mof because it is the 5th argument to sys_clone.
*/
if (p->mm && (clone_flags & CLONE_SETTLS)) {
- task_thread_info(p)->tls = regs->mof;
+ task_thread_info(p)->tls = childregs->mof;
}
/* Put the switch stack right below the pt_regs. */
- swstack = ((struct switch_stack *) childregs) - 1;
/* Parameter to ret_from_sys_call. 0 is don't restart the syscall. */
swstack->r9 = 0;
@@ -168,76 +152,12 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
swstack->return_ip = (unsigned long) ret_from_fork;
/* Fix the user-mode and kernel-mode stackpointer. */
- p->thread.usp = usp;
+ p->thread.usp = usp ?: rdusp();
p->thread.ksp = (unsigned long) swstack;
return 0;
}
-/*
- * Be aware of the "magic" 7th argument in the four system-calls below.
- * They need the latest stackframe, which is put as the 7th argument by
- * entry.S. The previous arguments are dummies or actually used, but need
- * to be defined to reach the 7th argument.
- *
- * N.B.: Another method to get the stackframe is to use current_regs(). But
- * it returns the latest stack-frame stacked when going from _user mode_ and
- * some of these (at least sys_clone) are called from kernel-mode sometimes
- * (for example during kernel_thread, above) and thus cannot use it. Thus,
- * to be sure not to get any surprises, we use the method for the other calls
- * as well.
- */
-asmlinkage int
-sys_fork(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-/* FIXME: Is parent_tid/child_tid really third/fourth argument? Update lib? */
-asmlinkage int
-sys_clone(unsigned long newusp, unsigned long flags, int *parent_tid, int *child_tid,
- unsigned long tls, long srp, struct pt_regs *regs)
-{
- if (!newusp)
- newusp = rdusp();
-
- return do_fork(flags, newusp, regs, 0, parent_tid, child_tid);
-}
-
-/*
- * vfork is a system call in i386 because of register-pressure - maybe
- * we can remove it and handle it in libc but we put it here until then.
- */
-asmlinkage int
-sys_vfork(long r10, long r11, long r12, long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-/* sys_execve() executes a new program. */
-asmlinkage int
-sys_execve(const char *fname,
- const char *const *argv,
- const char *const *envp, long r13, long mof, long srp,
- struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(fname);
- error = PTR_ERR(filename);
-
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
- out:
- return error;
-}
-
unsigned long
get_wchan(struct task_struct *p)
{
diff --git a/arch/cris/include/asm/processor.h b/arch/cris/include/asm/processor.h
index ef4e1bc3efc..675823f70c0 100644
--- a/arch/cris/include/asm/processor.h
+++ b/arch/cris/include/asm/processor.h
@@ -49,8 +49,6 @@ struct task_struct;
#define task_pt_regs(task) user_regs(task_thread_info(task))
#define current_regs() task_pt_regs(current)
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
diff --git a/arch/cris/include/asm/signal.h b/arch/cris/include/asm/signal.h
index ea6af9aad76..72dbbf59dfa 100644
--- a/arch/cris/include/asm/signal.h
+++ b/arch/cris/include/asm/signal.h
@@ -152,12 +152,6 @@ typedef struct sigaltstack {
#ifdef __KERNEL__
#include <asm/sigcontext.h>
-
-/* here we could define asm-optimized sigaddset, sigdelset etc. operations.
- * if we don't, generic ones are used from linux/signal.h
- */
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* __KERNEL__ */
#endif
diff --git a/arch/cris/include/asm/unistd.h b/arch/cris/include/asm/unistd.h
index 51873a446f8..f27b542e0eb 100644
--- a/arch/cris/include/asm/unistd.h
+++ b/arch/cris/include/asm/unistd.h
@@ -371,6 +371,10 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/cris/kernel/crisksyms.c b/arch/cris/kernel/crisksyms.c
index 7ac000f6a88..5868cee20eb 100644
--- a/arch/cris/kernel/crisksyms.c
+++ b/arch/cris/kernel/crisksyms.c
@@ -30,7 +30,6 @@ extern void __negdi2(void);
extern void iounmap(volatile void * __iomem);
/* Platform dependent support */
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(get_cmos_time);
EXPORT_SYMBOL(loops_per_usec);
diff --git a/arch/frv/include/asm/unistd.h b/arch/frv/include/asm/unistd.h
index 2358634cacc..1807d8ea8cb 100644
--- a/arch/frv/include/asm/unistd.h
+++ b/arch/frv/include/asm/unistd.h
@@ -30,6 +30,9 @@
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 7e33215f1d8..23916b2a12a 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -139,42 +139,12 @@ inline unsigned long user_stack(const struct pt_regs *regs)
return user_mode(regs) ? regs->sp : 0;
}
-asmlinkage int sys_fork(void)
-{
-#ifndef CONFIG_MMU
- /* fork almost works, enough to trick you into looking elsewhere:-( */
- return -EINVAL;
-#else
- return do_fork(SIGCHLD, user_stack(__frame), __frame, 0, NULL, NULL);
-#endif
-}
-
-asmlinkage int sys_vfork(void)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, user_stack(__frame), __frame, 0,
- NULL, NULL);
-}
-
-/*****************************************************************************/
-/*
- * clone a process
- * - tlsptr is retrieved by copy_thread()
- */
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tidptr, int __user *child_tidptr,
- int __user *tlsptr)
-{
- if (!newsp)
- newsp = user_stack(__frame);
- return do_fork(clone_flags, newsp, __frame, 0, parent_tidptr, child_tidptr);
-} /* end sys_clone() */
-
/*
* set up the kernel stack and exception frames for a new process
*/
int copy_thread(unsigned long clone_flags,
unsigned long usp, unsigned long arg,
- struct task_struct *p, struct pt_regs *regs)
+ struct task_struct *p)
{
struct pt_regs *childregs;
@@ -182,9 +152,7 @@ int copy_thread(unsigned long clone_flags,
(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
/* set up the userspace frame (the only place that the USP is stored) */
- *childregs = *__kernel_frame0_ptr;
-
- p->set_child_tid = p->clear_child_tid = NULL;
+ *childregs = *current_pt_regs();
p->thread.frame = childregs;
p->thread.curr = p;
@@ -193,18 +161,15 @@ int copy_thread(unsigned long clone_flags,
p->thread.lr = 0;
p->thread.frame0 = childregs;
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
childregs->gr9 = usp; /* function */
childregs->gr8 = arg;
p->thread.pc = (unsigned long) ret_from_kernel_thread;
save_user_regs(p->thread.user);
return 0;
}
-
- /* set up the userspace frame (the only place that the USP is stored) */
- *childregs = *regs;
-
- childregs->sp = usp;
+ if (usp)
+ childregs->sp = usp;
childregs->next_frame = NULL;
p->thread.pc = (unsigned long) ret_from_fork;
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 98fabd10e95..04bef4d25b4 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -8,6 +8,8 @@ config H8300
select GENERIC_IRQ_SHOW
select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config SYMBOL_PREFIX
string
diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h
index 4c9f6f87b61..4b0ca49bb46 100644
--- a/arch/h8300/include/asm/processor.h
+++ b/arch/h8300/include/asm/processor.h
@@ -107,8 +107,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
/*
* Free current thread data structures etc..
*/
diff --git a/arch/h8300/include/asm/ptrace.h b/arch/h8300/include/asm/ptrace.h
index d09c440bdba..7468589a128 100644
--- a/arch/h8300/include/asm/ptrace.h
+++ b/arch/h8300/include/asm/ptrace.h
@@ -60,6 +60,9 @@ struct pt_regs {
#define user_mode(regs) (!((regs)->ccr & PS_S))
#define instruction_pointer(regs) ((regs)->pc)
#define profile_pc(regs) instruction_pointer(regs)
+#define current_pt_regs() ((struct pt_regs *) \
+ (THREAD_SIZE + (unsigned long)current_thread_info()) - 1)
+#define signal_pt_regs() ((struct pt_regs *)current->thread.esp0)
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
#endif /* _H8300_PTRACE_H */
diff --git a/arch/h8300/include/asm/signal.h b/arch/h8300/include/asm/signal.h
index fd8b66e40dc..c43c0a7d2c2 100644
--- a/arch/h8300/include/asm/signal.h
+++ b/arch/h8300/include/asm/signal.h
@@ -154,8 +154,6 @@ typedef struct sigaltstack {
#include <asm/sigcontext.h>
#undef __HAVE_ARCH_SIG_BITOPS
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* __KERNEL__ */
#endif /* _H8300_SIGNAL_H */
diff --git a/arch/h8300/include/asm/unistd.h b/arch/h8300/include/asm/unistd.h
index 5cd882801d7..c2c2f5c7d6b 100644
--- a/arch/h8300/include/asm/unistd.h
+++ b/arch/h8300/include/asm/unistd.h
@@ -356,6 +356,10 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S
index ca743169030..617a6878787 100644
--- a/arch/h8300/kernel/entry.S
+++ b/arch/h8300/kernel/entry.S
@@ -158,6 +158,7 @@ INTERRUPTS = 128
.globl SYMBOL_NAME(system_call)
.globl SYMBOL_NAME(ret_from_exception)
.globl SYMBOL_NAME(ret_from_fork)
+.globl SYMBOL_NAME(ret_from_kernel_thread)
.globl SYMBOL_NAME(ret_from_interrupt)
.globl SYMBOL_NAME(interrupt_redirect_table)
.globl SYMBOL_NAME(sw_ksp),SYMBOL_NAME(sw_usp)
@@ -330,6 +331,14 @@ SYMBOL_NAME_LABEL(ret_from_fork)
jsr @SYMBOL_NAME(schedule_tail)
jmp @SYMBOL_NAME(ret_from_exception)
+SYMBOL_NAME_LABEL(ret_from_kernel_thread)
+ mov.l er2,er0
+ jsr @SYMBOL_NAME(schedule_tail)
+ mov.l @(LER4:16,sp),er0
+ mov.l @(LER5:16,sp),er1
+ jsr @er1
+ jmp @SYMBOL_NAME(ret_from_exception)
+
SYMBOL_NAME_LABEL(resume)
/*
* Beware - when entering resume, offset of tss is in d1,
diff --git a/arch/h8300/kernel/h8300_ksyms.c b/arch/h8300/kernel/h8300_ksyms.c
index 6866bd9c7fb..53d7c0e4bd8 100644
--- a/arch/h8300/kernel/h8300_ksyms.c
+++ b/arch/h8300/kernel/h8300_ksyms.c
@@ -33,7 +33,6 @@ EXPORT_SYMBOL(strncmp);
EXPORT_SYMBOL(ip_fast_csum);
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(enable_irq);
EXPORT_SYMBOL(disable_irq);
diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index e8dc1393a13..b609f63f159 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -47,6 +47,7 @@ void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
/*
* The idle loop on an H8/300..
@@ -122,113 +123,34 @@ void show_regs(struct pt_regs * regs)
printk("\n");
}
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
- long clone_arg;
- mm_segment_t fs;
-
- fs = get_fs();
- set_fs (KERNEL_DS);
- clone_arg = flags | CLONE_VM;
- __asm__("mov.l sp,er3\n\t"
- "sub.l er2,er2\n\t"
- "mov.l %2,er1\n\t"
- "mov.l %1,er0\n\t"
- "trapa #0\n\t"
- "cmp.l sp,er3\n\t"
- "beq 1f\n\t"
- "mov.l %4,er0\n\t"
- "mov.l %3,er1\n\t"
- "jsr @er1\n\t"
- "mov.l %5,er0\n\t"
- "trapa #0\n"
- "1:\n\t"
- "mov.l er0,%0"
- :"=r"(retval)
- :"i"(__NR_clone),"g"(clone_arg),"g"(fn),"g"(arg),"i"(__NR_exit)
- :"er0","er1","er2","er3");
- set_fs (fs);
- return retval;
-}
-
void flush_thread(void)
{
}
-/*
- * "h8300_fork()".. By the time we get here, the
- * non-volatile registers have also been saved on the
- * stack. We do some ugly pointer stuff here.. (see
- * also copy_thread)
- */
-
-asmlinkage int h8300_fork(struct pt_regs *regs)
-{
- return -EINVAL;
-}
-
-asmlinkage int h8300_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-}
-
-asmlinkage int h8300_clone(struct pt_regs *regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
-
- /* syscall2 puts clone_flags in er1 and usp in er2 */
- clone_flags = regs->er1;
- newsp = regs->er2;
- if (!newsp)
- newsp = rdusp();
- return do_fork(clone_flags, newsp, regs, 0, NULL, NULL);
-
-}
-
int copy_thread(unsigned long clone_flags,
unsigned long usp, unsigned long topstk,
- struct task_struct * p, struct pt_regs * regs)
+ struct task_struct * p)
{
struct pt_regs * childregs;
childregs = (struct pt_regs *) (THREAD_SIZE + task_stack_page(p)) - 1;
- *childregs = *regs;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ childregs->retpc = (unsigned long) ret_from_kernel_thread;
+ childregs->er4 = topstk; /* arg */
+ childregs->er5 = usp; /* fn */
+ p->thread.ksp = (unsigned long)childregs;
+ }
+ *childregs = *current_pt_regs();
childregs->retpc = (unsigned long) ret_from_fork;
childregs->er0 = 0;
-
- p->thread.usp = usp;
+ p->thread.usp = usp ?: rdusp();
p->thread.ksp = (unsigned long)childregs;
return 0;
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char *name,
- const char *const *argv,
- const char *const *envp,
- int dummy, ...)
-{
- int error;
- struct filename *filename;
- struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
-
- filename = getname(name);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- return error;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
- return error;
-}
-
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return ((struct pt_regs *)tsk->thread.esp0)->pc;
diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c
index 4bdc7311784..bf350cb7f59 100644
--- a/arch/h8300/kernel/sys_h8300.c
+++ b/arch/h8300/kernel/sys_h8300.c
@@ -46,29 +46,3 @@ asmlinkage void syscall_print(void *dummy,...)
((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
}
#endif
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-asmlinkage
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register long res __asm__("er0");
- register const char *const *_c __asm__("er3") = envp;
- register const char *const *_b __asm__("er2") = argv;
- register const char * _a __asm__("er1") = filename;
- __asm__ __volatile__ ("mov.l %1,er0\n\t"
- "trapa #0\n\t"
- : "=r" (res)
- : "g" (__NR_execve),
- "g" (_a),
- "g" (_b),
- "g" (_c)
- : "cc", "memory");
- return res;
-}
-
-
diff --git a/arch/h8300/kernel/syscalls.S b/arch/h8300/kernel/syscalls.S
index 9d77e715a2e..b74dd0ade58 100644
--- a/arch/h8300/kernel/syscalls.S
+++ b/arch/h8300/kernel/syscalls.S
@@ -340,21 +340,12 @@ SYMBOL_NAME_LABEL(sys_call_table)
bra SYMBOL_NAME(syscall_trampoline):8
.endm
-SYMBOL_NAME_LABEL(sys_clone)
- call_sp h8300_clone
-
SYMBOL_NAME_LABEL(sys_sigreturn)
call_sp do_sigreturn
SYMBOL_NAME_LABEL(sys_rt_sigreturn)
call_sp do_rt_sigreturn
-SYMBOL_NAME_LABEL(sys_fork)
- call_sp h8300_fork
-
-SYMBOL_NAME_LABEL(sys_vfork)
- call_sp h8300_vfork
-
SYMBOL_NAME_LABEL(syscall_trampoline)
mov.l sp,er0
jmp @er6
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 0744f7d7b1f..e418803b6c8 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -31,6 +31,8 @@ config HEXAGON
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
---help---
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.
diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h
index a03323ab9d4..6dd5d370686 100644
--- a/arch/hexagon/include/asm/processor.h
+++ b/arch/hexagon/include/asm/processor.h
@@ -34,7 +34,6 @@
struct task_struct;
/* this is defined in arch/process.c */
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern unsigned long thread_saved_pc(struct task_struct *tsk);
extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
diff --git a/arch/hexagon/include/asm/syscall.h b/arch/hexagon/include/asm/syscall.h
index fb0e9d48faa..4af9c7b6f13 100644
--- a/arch/hexagon/include/asm/syscall.h
+++ b/arch/hexagon/include/asm/syscall.h
@@ -25,14 +25,6 @@ typedef long (*syscall_fn)(unsigned long, unsigned long,
unsigned long, unsigned long,
unsigned long, unsigned long);
-asmlinkage int sys_execve(char __user *ufilename, char __user * __user *argv,
- char __user * __user *envp);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidp, unsigned long child_tidp);
-
-#define sys_execve sys_execve
-#define sys_clone sys_clone
-
#include <asm-generic/syscalls.h>
extern void *sys_call_table[];
diff --git a/arch/hexagon/include/uapi/asm/ptrace.h b/arch/hexagon/include/uapi/asm/ptrace.h
index 8ef784047a7..1ffce0c6ee0 100644
--- a/arch/hexagon/include/uapi/asm/ptrace.h
+++ b/arch/hexagon/include/uapi/asm/ptrace.h
@@ -32,4 +32,8 @@
extern int regs_query_register_offset(const char *name);
extern const char *regs_query_register_name(unsigned int offset);
+#define current_pt_regs() \
+ ((struct pt_regs *) \
+ ((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
#endif
diff --git a/arch/hexagon/include/uapi/asm/unistd.h b/arch/hexagon/include/uapi/asm/unistd.h
index 81312d6a52e..2af81533bd0 100644
--- a/arch/hexagon/include/uapi/asm/unistd.h
+++ b/arch/hexagon/include/uapi/asm/unistd.h
@@ -27,5 +27,7 @@
*/
#define sys_mmap2 sys_mmap_pgoff
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
#include <asm-generic/unistd.h>
diff --git a/arch/hexagon/kernel/Makefile b/arch/hexagon/kernel/Makefile
index 536aec093e6..6c19501b487 100644
--- a/arch/hexagon/kernel/Makefile
+++ b/arch/hexagon/kernel/Makefile
@@ -3,8 +3,7 @@ extra-y := head.o vmlinux.lds
obj-$(CONFIG_SMP) += smp.o topology.o
obj-y += setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o
-obj-y += process.o syscall.o trampoline.o reset.o ptrace.o
-obj-y += vdso.o
+obj-y += process.o trampoline.o reset.o ptrace.o vdso.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_MODULES) += module.o hexagon_ksyms.o
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index 9f6d7411b57..06ae9ffcabd 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -26,33 +26,6 @@
#include <linux/slab.h>
/*
- * Kernel thread creation. The desired kernel function is "wrapped"
- * in the kernel_thread_helper function, which does cleanup
- * afterwards.
- */
-static void __noreturn kernel_thread_helper(void *arg, int (*fn)(void *))
-{
- do_exit(fn(arg));
-}
-
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
- /*
- * Yes, we're exploting illicit knowledge of the ABI here.
- */
- regs.r00 = (unsigned long) arg;
- regs.r01 = (unsigned long) fn;
- pt_set_elr(&regs, (unsigned long)kernel_thread_helper);
- pt_set_kmode(&regs);
-
- return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
* Program thread launch. Often defined as a macro in processor.h,
* but we're shooting for a small footprint and it's not an inner-loop
* performance-critical operation.
@@ -114,8 +87,7 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
* Copy architecture-specific thread state
*/
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p,
- struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
struct hexagon_switch_stack *ss;
@@ -125,61 +97,51 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs = (struct pt_regs *) (((unsigned long) ti + THREAD_SIZE) -
sizeof(*childregs));
- memcpy(childregs, regs, sizeof(*childregs));
ti->regs = childregs;
/*
* Establish kernel stack pointer and initial PC for new thread
+ * Note that unlike the usual situation, we do not copy the
+ * parent's callee-saved here; those are in pt_regs and whatever
+ * we leave here will be overridden on return to userland.
*/
ss = (struct hexagon_switch_stack *) ((unsigned long) childregs -
sizeof(*ss));
ss->lr = (unsigned long)ret_from_fork;
p->thread.switch_sp = ss;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ /* r24 <- fn, r25 <- arg */
+ ss->r2524 = usp | ((u64)arg << 32);
+ pt_set_kmode(childregs);
+ return 0;
+ }
+ memcpy(childregs, current_pt_regs(), sizeof(*childregs));
+ ss->r2524 = 0;
- /* If User mode thread, set pt_reg stack pointer as per parameter */
- if (user_mode(childregs)) {
+ if (usp)
pt_set_rte_sp(childregs, usp);
- /* Child sees zero return value */
- childregs->r00 = 0;
-
- /*
- * The clone syscall has the C signature:
- * int [r0] clone(int flags [r0],
- * void *child_frame [r1],
- * void *parent_tid [r2],
- * void *child_tid [r3],
- * void *thread_control_block [r4]);
- * ugp is used to provide TLS support.
- */
- if (clone_flags & CLONE_SETTLS)
- childregs->ugp = childregs->r04;
-
- /*
- * Parent sees new pid -- not necessary, not even possible at
- * this point in the fork process
- * Might also want to set things like ti->addr_limit
- */
- } else {
- /*
- * If kernel thread, resume stack is kernel stack base.
- * Note that this is pointer arithmetic on pt_regs *
- */
- pt_set_rte_sp(childregs, (unsigned long)(childregs + 1));
- /*
- * We need the current thread_info fast path pointer
- * set up in pt_regs. The register to be used is
- * parametric for assembler code, but the mechanism
- * doesn't drop neatly into C. Needs to be fixed.
- */
- childregs->THREADINFO_REG = (unsigned long) ti;
- }
+ /* Child sees zero return value */
+ childregs->r00 = 0;
+
+ /*
+ * The clone syscall has the C signature:
+ * int [r0] clone(int flags [r0],
+ * void *child_frame [r1],
+ * void *parent_tid [r2],
+ * void *child_tid [r3],
+ * void *thread_control_block [r4]);
+ * ugp is used to provide TLS support.
+ */
+ if (clone_flags & CLONE_SETTLS)
+ childregs->ugp = childregs->r04;
/*
- * thread_info pointer is pulled out of task_struct "stack"
- * field on switch_to.
+ * Parent sees new pid -- not necessary, not even possible at
+ * this point in the fork process
+ * Might also want to set things like ti->addr_limit
*/
- p->stack = (void *)ti;
return 0;
}
diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index 5047b8b879c..fe0d1373165 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -249,14 +249,14 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
*/
asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
- struct pt_regs *regs = current_thread_info()->regs;
+ struct pt_regs *regs = current_pt_regs();
return do_sigaltstack(uss, uoss, regs->r29);
}
asmlinkage int sys_rt_sigreturn(void)
{
- struct pt_regs *regs = current_thread_info()->regs;
+ struct pt_regs *regs = current_pt_regs();
struct rt_sigframe __user *frame;
sigset_t blocked;
diff --git a/arch/hexagon/kernel/syscall.c b/arch/hexagon/kernel/syscall.c
deleted file mode 100644
index 319fa6494f5..00000000000
--- a/arch/hexagon/kernel/syscall.c
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Hexagon system calls
- *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/linkage.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/syscalls.h>
-#include <linux/unistd.h>
-#include <asm/mman.h>
-#include <asm/registers.h>
-
-/*
- * System calls with architecture-specific wrappers.
- * See signal.c for signal-related system call wrappers.
- */
-
-asmlinkage int sys_execve(char __user *ufilename,
- const char __user *const __user *argv,
- const char __user *const __user *envp)
-{
- struct pt_regs *pregs = current_thread_info()->regs;
- struct filename *filename;
- int retval;
-
- filename = getname(ufilename);
- retval = PTR_ERR(filename);
- if (IS_ERR(filename))
- return retval;
-
- retval = do_execve(filename->name, argv, envp, pregs);
- putname(filename);
-
- return retval;
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidp, unsigned long child_tidp)
-{
- struct pt_regs *pregs = current_thread_info()->regs;
-
- if (!newsp)
- newsp = pregs->SP;
- return do_fork(clone_flags, newsp, pregs, 0, (int __user *)parent_tidp,
- (int __user *)child_tidp);
-}
-
-/*
- * Do a system call from the kernel, so as to have a proper pt_regs
- * and recycle the sys_execvpe infrustructure.
- */
-int kernel_execve(const char *filename,
- const char *const argv[], const char *const envp[])
-{
- register unsigned long __a0 asm("r0") = (unsigned long) filename;
- register unsigned long __a1 asm("r1") = (unsigned long) argv;
- register unsigned long __a2 asm("r2") = (unsigned long) envp;
- int retval;
-
- __asm__ volatile(
- " R6 = #%4;\n"
- " trap0(#1);\n"
- " %0 = R0;\n"
- : "=r" (retval)
- : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
- );
-
- return retval;
-}
diff --git a/arch/hexagon/kernel/vm_entry.S b/arch/hexagon/kernel/vm_entry.S
index cd71673ac25..425e50c694f 100644
--- a/arch/hexagon/kernel/vm_entry.S
+++ b/arch/hexagon/kernel/vm_entry.S
@@ -266,4 +266,8 @@ _K_enter_machcheck:
.globl ret_from_fork
ret_from_fork:
call schedule_tail
+ P0 = cmp.eq(R24, #0);
+ if P0 jump return_from_syscall
+ R0 = R25;
+ callr R24
jump return_from_syscall
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 3279646120e..67060046812 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -42,6 +42,8 @@ config IA64
select GENERIC_TIME_VSYSCALL_OLD
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
default y
help
The Itanium Processor Family is Intel's 64-bit successor to
diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h
index 944152a5091..e0a899a1a8a 100644
--- a/arch/ia64/include/asm/processor.h
+++ b/arch/ia64/include/asm/processor.h
@@ -340,22 +340,6 @@ struct task_struct;
*/
#define release_thread(dead_task)
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE 1: Only a kernel-only process (ie the swapper or direct
- * descendants who haven't done an "execve()") should use this: it
- * will work within a system call from a "real" process, but the
- * process memory space will not be free'd until both the parent and
- * the child have exited.
- *
- * NOTE 2: This MUST NOT be an inlined function. Otherwise, we get
- * into trouble in init/main.c when the child thread returns to
- * do_basic_setup() and the timing is such that free_initmem() has
- * been called already.
- */
-extern pid_t kernel_thread (int (*fn)(void *), void *arg, unsigned long flags);
-
/* Get wait channel for task P. */
extern unsigned long get_wchan (struct task_struct *p);
diff --git a/arch/ia64/include/asm/signal.h b/arch/ia64/include/asm/signal.h
index aecda5b9eb4..3a1b20e74c5 100644
--- a/arch/ia64/include/asm/signal.h
+++ b/arch/ia64/include/asm/signal.h
@@ -38,7 +38,5 @@ struct k_sigaction {
# include <asm/sigcontext.h>
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
# endif /* !__ASSEMBLY__ */
#endif /* _ASM_IA64_SIGNAL_H */
diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h
index 8b3ff2f5b86..1574bca8613 100644
--- a/arch/ia64/include/asm/unistd.h
+++ b/arch/ia64/include/asm/unistd.h
@@ -29,6 +29,7 @@
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
#if !defined(__ASSEMBLY__) && !defined(ASSEMBLER)
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 1ccbe12a4d8..e25b784a2b7 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -61,14 +61,13 @@ ENTRY(ia64_execve)
* Allocate 8 input registers since ptrace() may clobber them
*/
.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
- alloc loc1=ar.pfs,8,2,4,0
+ alloc loc1=ar.pfs,8,2,3,0
mov loc0=rp
.body
mov out0=in0 // filename
;; // stop bit between alloc and call
mov out1=in1 // argv
mov out2=in2 // envp
- add out3=16,sp // regs
br.call.sptk.many rp=sys_execve
.ret0:
cmp4.ge p6,p7=r8,r0
@@ -76,7 +75,6 @@ ENTRY(ia64_execve)
sxt4 r8=r8 // return 64-bit result
;;
stf.spill [sp]=f0
-(p6) cmp.ne pKStk,pUStk=r0,r0 // a successful execve() lands us in user-mode...
mov rp=loc0
(p6) mov ar.pfs=r0 // clear ar.pfs on success
(p7) br.ret.sptk.many rp
@@ -118,13 +116,12 @@ GLOBAL_ENTRY(sys_clone2)
mov loc1=r16 // save ar.pfs across do_fork
.body
mov out1=in1
- mov out3=in2
+ mov out2=in2
tbit.nz p6,p0=in0,CLONE_SETTLS_BIT
- mov out4=in3 // parent_tidptr: valid only w/CLONE_PARENT_SETTID
+ mov out3=in3 // parent_tidptr: valid only w/CLONE_PARENT_SETTID
;;
(p6) st8 [r2]=in5 // store TLS in r16 for copy_thread()
- mov out5=in4 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID
- adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = &regs
+ mov out4=in4 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID
mov out0=in0 // out0 = clone_flags
br.call.sptk.many rp=do_fork
.ret1: .restore sp
@@ -150,13 +147,12 @@ GLOBAL_ENTRY(sys_clone)
mov loc1=r16 // save ar.pfs across do_fork
.body
mov out1=in1
- mov out3=16 // stacksize (compensates for 16-byte scratch area)
+ mov out2=16 // stacksize (compensates for 16-byte scratch area)
tbit.nz p6,p0=in0,CLONE_SETTLS_BIT
- mov out4=in2 // parent_tidptr: valid only w/CLONE_PARENT_SETTID
+ mov out3=in2 // parent_tidptr: valid only w/CLONE_PARENT_SETTID
;;
(p6) st8 [r2]=in4 // store TLS in r13 (tp)
- mov out5=in3 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID
- adds out2=IA64_SWITCH_STACK_SIZE+16,sp // out2 = &regs
+ mov out4=in3 // child_tidptr: valid only w/CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID
mov out0=in0 // out0 = clone_flags
br.call.sptk.many rp=do_fork
.ret2: .restore sp
@@ -484,19 +480,6 @@ GLOBAL_ENTRY(prefetch_stack)
br.ret.sptk.many rp
END(prefetch_stack)
-GLOBAL_ENTRY(kernel_execve)
- rum psr.ac
- mov r15=__NR_execve // put syscall number in place
- break __BREAK_SYSCALL
- br.ret.sptk.many rp
-END(kernel_execve)
-
-GLOBAL_ENTRY(clone)
- mov r15=__NR_clone // put syscall number in place
- break __BREAK_SYSCALL
- br.ret.sptk.many rp
-END(clone)
-
/*
* Invoke a system call, but do some tracing before and after the call.
* We MUST preserve the current register frame throughout this routine
@@ -600,6 +583,27 @@ GLOBAL_ENTRY(ia64_strace_leave_kernel)
.ret4: br.cond.sptk ia64_leave_kernel
END(ia64_strace_leave_kernel)
+ENTRY(call_payload)
+ .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(0)
+ /* call the kernel_thread payload; fn is in r4, arg - in r5 */
+ alloc loc1=ar.pfs,0,3,1,0
+ mov loc0=rp
+ mov loc2=gp
+ mov out0=r5 // arg
+ ld8 r14 = [r4], 8 // fn.address
+ ;;
+ mov b6 = r14
+ ld8 gp = [r4] // fn.gp
+ ;;
+ br.call.sptk.many rp=b6 // fn(arg)
+.ret12: mov gp=loc2
+ mov rp=loc0
+ mov ar.pfs=loc1
+ /* ... and if it has returned, we are going to userland */
+ cmp.ne pKStk,pUStk=r0,r0
+ br.ret.sptk.many rp
+END(call_payload)
+
GLOBAL_ENTRY(ia64_ret_from_clone)
PT_REGS_UNWIND_INFO(0)
{ /*
@@ -616,6 +620,7 @@ GLOBAL_ENTRY(ia64_ret_from_clone)
br.call.sptk.many rp=ia64_invoke_schedule_tail
}
.ret8:
+(pKStk) br.call.sptk.many rp=call_payload
adds r2=TI_FLAGS+IA64_TASK_SIZE,r13
;;
ld4 r2=[r2]
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index 629a250f7c1..4738ff7bd66 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -1093,19 +1093,6 @@ GLOBAL_ENTRY(cycle_to_cputime)
END(cycle_to_cputime)
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
-GLOBAL_ENTRY(start_kernel_thread)
- .prologue
- .save rp, r0 // this is the end of the call-chain
- .body
- alloc r2 = ar.pfs, 0, 0, 2, 0
- mov out0 = r9
- mov out1 = r11;;
- br.call.sptk.many rp = kernel_thread_helper;;
- mov out0 = r8
- br.call.sptk.many rp = sys_exit;;
-1: br.sptk.few 1b // not reached
-END(start_kernel_thread)
-
#ifdef CONFIG_IA64_BRL_EMU
/*
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 35e106f2ed1..31360cbbd5f 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -393,72 +393,24 @@ ia64_load_extra (struct task_struct *task)
int
copy_thread(unsigned long clone_flags,
unsigned long user_stack_base, unsigned long user_stack_size,
- struct task_struct *p, struct pt_regs *regs)
+ struct task_struct *p)
{
extern char ia64_ret_from_clone;
struct switch_stack *child_stack, *stack;
unsigned long rbs, child_rbs, rbs_size;
struct pt_regs *child_ptregs;
+ struct pt_regs *regs = current_pt_regs();
int retval = 0;
-#ifdef CONFIG_SMP
- /*
- * For SMP idle threads, fork_by_hand() calls do_fork with
- * NULL regs.
- */
- if (!regs)
- return 0;
-#endif
-
- stack = ((struct switch_stack *) regs) - 1;
-
child_ptregs = (struct pt_regs *) ((unsigned long) p + IA64_STK_OFFSET) - 1;
child_stack = (struct switch_stack *) child_ptregs - 1;
- /* copy parent's switch_stack & pt_regs to child: */
- memcpy(child_stack, stack, sizeof(*child_ptregs) + sizeof(*child_stack));
-
rbs = (unsigned long) current + IA64_RBS_OFFSET;
child_rbs = (unsigned long) p + IA64_RBS_OFFSET;
- rbs_size = stack->ar_bspstore - rbs;
-
- /* copy the parent's register backing store to the child: */
- memcpy((void *) child_rbs, (void *) rbs, rbs_size);
-
- if (likely(user_mode(child_ptregs))) {
- if (clone_flags & CLONE_SETTLS)
- child_ptregs->r13 = regs->r16; /* see sys_clone2() in entry.S */
- if (user_stack_base) {
- child_ptregs->r12 = user_stack_base + user_stack_size - 16;
- child_ptregs->ar_bspstore = user_stack_base;
- child_ptregs->ar_rnat = 0;
- child_ptregs->loadrs = 0;
- }
- } else {
- /*
- * Note: we simply preserve the relative position of
- * the stack pointer here. There is no need to
- * allocate a scratch area here, since that will have
- * been taken care of by the caller of sys_clone()
- * already.
- */
- child_ptregs->r12 = (unsigned long) child_ptregs - 16; /* kernel sp */
- child_ptregs->r13 = (unsigned long) p; /* set `current' pointer */
- }
- child_stack->ar_bspstore = child_rbs + rbs_size;
- child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
/* copy parts of thread_struct: */
p->thread.ksp = (unsigned long) child_stack - 16;
- /* stop some PSR bits from being inherited.
- * the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
- * therefore we must specify them explicitly here and not include them in
- * IA64_PSR_BITS_TO_CLEAR.
- */
- child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
- & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
-
/*
* NOTE: The calling convention considers all floating point
* registers in the high partition (fph) to be scratch. Since
@@ -480,8 +432,66 @@ copy_thread(unsigned long clone_flags,
# define THREAD_FLAGS_TO_SET 0
p->thread.flags = ((current->thread.flags & ~THREAD_FLAGS_TO_CLEAR)
| THREAD_FLAGS_TO_SET);
+
ia64_drop_fpu(p); /* don't pick up stale state from a CPU's fph */
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ if (unlikely(!user_stack_base)) {
+ /* fork_idle() called us */
+ return 0;
+ }
+ memset(child_stack, 0, sizeof(*child_ptregs) + sizeof(*child_stack));
+ child_stack->r4 = user_stack_base; /* payload */
+ child_stack->r5 = user_stack_size; /* argument */
+ /*
+ * Preserve PSR bits, except for bits 32-34 and 37-45,
+ * which we can't read.
+ */
+ child_ptregs->cr_ipsr = ia64_getreg(_IA64_REG_PSR) | IA64_PSR_BN;
+ /* mark as valid, empty frame */
+ child_ptregs->cr_ifs = 1UL << 63;
+ child_stack->ar_fpsr = child_ptregs->ar_fpsr
+ = ia64_getreg(_IA64_REG_AR_FPSR);
+ child_stack->pr = (1 << PRED_KERNEL_STACK);
+ child_stack->ar_bspstore = child_rbs;
+ child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
+
+ /* stop some PSR bits from being inherited.
+ * the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
+ * therefore we must specify them explicitly here and not include them in
+ * IA64_PSR_BITS_TO_CLEAR.
+ */
+ child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
+ & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
+
+ return 0;
+ }
+ stack = ((struct switch_stack *) regs) - 1;
+ /* copy parent's switch_stack & pt_regs to child: */
+ memcpy(child_stack, stack, sizeof(*child_ptregs) + sizeof(*child_stack));
+
+ /* copy the parent's register backing store to the child: */
+ rbs_size = stack->ar_bspstore - rbs;
+ memcpy((void *) child_rbs, (void *) rbs, rbs_size);
+ if (clone_flags & CLONE_SETTLS)
+ child_ptregs->r13 = regs->r16; /* see sys_clone2() in entry.S */
+ if (user_stack_base) {
+ child_ptregs->r12 = user_stack_base + user_stack_size - 16;
+ child_ptregs->ar_bspstore = user_stack_base;
+ child_ptregs->ar_rnat = 0;
+ child_ptregs->loadrs = 0;
+ }
+ child_stack->ar_bspstore = child_rbs + rbs_size;
+ child_stack->b0 = (unsigned long) &ia64_ret_from_clone;
+
+ /* stop some PSR bits from being inherited.
+ * the psr.up/psr.pp bits must be cleared on fork but inherited on execve()
+ * therefore we must specify them explicitly here and not include them in
+ * IA64_PSR_BITS_TO_CLEAR.
+ */
+ child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
+ & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
+
#ifdef CONFIG_PERFMON
if (current->thread.pfm_context)
pfm_inherit(p, child_ptregs);
@@ -608,57 +618,6 @@ dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
return 1; /* f0-f31 are always valid so we always return 1 */
}
-long
-sys_execve (const char __user *filename,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- struct pt_regs *regs)
-{
- struct filename *fname;
- int error;
-
- fname = getname(filename);
- error = PTR_ERR(fname);
- if (IS_ERR(fname))
- goto out;
- error = do_execve(fname->name, argv, envp, regs);
- putname(fname);
-out:
- return error;
-}
-
-pid_t
-kernel_thread (int (*fn)(void *), void *arg, unsigned long flags)
-{
- extern void start_kernel_thread (void);
- unsigned long *helper_fptr = (unsigned long *) &start_kernel_thread;
- struct {
- struct switch_stack sw;
- struct pt_regs pt;
- } regs;
-
- memset(&regs, 0, sizeof(regs));
- regs.pt.cr_iip = helper_fptr[0]; /* set entry point (IP) */
- regs.pt.r1 = helper_fptr[1]; /* set GP */
- regs.pt.r9 = (unsigned long) fn; /* 1st argument */
- regs.pt.r11 = (unsigned long) arg; /* 2nd argument */
- /* Preserve PSR bits, except for bits 32-34 and 37-45, which we can't read. */
- regs.pt.cr_ipsr = ia64_getreg(_IA64_REG_PSR) | IA64_PSR_BN;
- regs.pt.cr_ifs = 1UL << 63; /* mark as valid, empty frame */
- regs.sw.ar_fpsr = regs.pt.ar_fpsr = ia64_getreg(_IA64_REG_AR_FPSR);
- regs.sw.ar_bspstore = (unsigned long) current + IA64_RBS_OFFSET;
- regs.sw.pr = (1 << PRED_KERNEL_STACK);
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs.pt, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/* This gets called from kernel_thread() via ia64_invoke_thread_helper(). */
-int
-kernel_thread_helper (int (*fn)(void *), void *arg)
-{
- return (*fn)(arg);
-}
-
/*
* Flush thread state. This is called when a thread does an execve().
*/
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 963d2db53bf..6a368cb2043 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -460,11 +460,6 @@ start_secondary (void *unused)
return 0;
}
-struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
-{
- return NULL;
-}
-
static int __cpuinit
do_boot_cpu (int sapicid, int cpu, struct task_struct *idle)
{
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index f807721e19a..5183f43a2cf 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -15,6 +15,8 @@ config M32R
select GENERIC_ATOMIC64
select ARCH_USES_GETTIMEOFFSET
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config SBUS
bool
diff --git a/arch/m32r/include/asm/processor.h b/arch/m32r/include/asm/processor.h
index da17253b573..5767367550c 100644
--- a/arch/m32r/include/asm/processor.h
+++ b/arch/m32r/include/asm/processor.h
@@ -118,11 +118,6 @@ struct mm_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
-/*
- * create a kernel thread without removing it from tasklists
- */
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
/* Copy and release all segment info associated with a VM */
extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
extern void release_segments(struct mm_struct * mm);
diff --git a/arch/m32r/include/asm/ptrace.h b/arch/m32r/include/asm/ptrace.h
index 4313aa62b51..c4432f1fb2c 100644
--- a/arch/m32r/include/asm/ptrace.h
+++ b/arch/m32r/include/asm/ptrace.h
@@ -139,6 +139,8 @@ extern void withdraw_debug_trap(struct pt_regs *regs);
#define task_pt_regs(task) \
((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE) - 1)
+#define current_pt_regs() ((struct pt_regs *) \
+ ((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
#endif /* __KERNEL */
diff --git a/arch/m32r/include/asm/signal.h b/arch/m32r/include/asm/signal.h
index ea5f95e4079..e4d2e2ad5f1 100644
--- a/arch/m32r/include/asm/signal.h
+++ b/arch/m32r/include/asm/signal.h
@@ -149,10 +149,6 @@ typedef struct sigaltstack {
#undef __HAVE_ARCH_SIG_BITOPS
-struct pt_regs;
-
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* __KERNEL__ */
#endif /* _ASM_M32R_SIGNAL_H */
diff --git a/arch/m32r/include/asm/unistd.h b/arch/m32r/include/asm/unistd.h
index d5e66a48078..d9e7351af2a 100644
--- a/arch/m32r/include/asm/unistd.h
+++ b/arch/m32r/include/asm/unistd.h
@@ -352,6 +352,10 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
#define __IGNORE_lchown
#define __IGNORE_setuid
diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S
index 225412bc227..0c01543f10c 100644
--- a/arch/m32r/kernel/entry.S
+++ b/arch/m32r/kernel/entry.S
@@ -125,6 +125,15 @@
and \reg, sp
.endm
+ENTRY(ret_from_kernel_thread)
+ pop r0
+ bl schedule_tail
+ GET_THREAD_INFO(r8)
+ ld r0, R0(r8)
+ ld r1, R1(r8)
+ jl r1
+ bra syscall_exit
+
ENTRY(ret_from_fork)
pop r0
bl schedule_tail
diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c
index 700570747a9..b727e693c80 100644
--- a/arch/m32r/kernel/m32r_ksyms.c
+++ b/arch/m32r/kernel/m32r_ksyms.c
@@ -21,7 +21,6 @@ EXPORT_SYMBOL(boot_cpu_data);
EXPORT_SYMBOL(dump_fpu);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(strncpy_from_user);
EXPORT_SYMBOL(__strncpy_from_user);
diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index e7366276ef3..765d0f57c78 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -165,41 +165,6 @@ void show_regs(struct pt_regs * regs)
}
/*
- * Create a kernel thread
- */
-
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be free'd until both the parent and the child have exited.
- */
-static void kernel_thread_helper(void *nouse, int (*fn)(void *), void *arg)
-{
- fn(arg);
- do_exit(-1);
-}
-
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof (regs));
- regs.r1 = (unsigned long)fn;
- regs.r2 = (unsigned long)arg;
-
- regs.bpc = (unsigned long)kernel_thread_helper;
-
- regs.psw = M32R_PSW_BIE;
-
- /* Ok, create the new process. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL,
- NULL);
-}
-
-/*
* Free current thread data structures etc..
*/
void exit_thread(void)
@@ -227,88 +192,31 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
}
int copy_thread(unsigned long clone_flags, unsigned long spu,
- unsigned long unused, struct task_struct *tsk, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *tsk)
{
struct pt_regs *childregs = task_pt_regs(tsk);
extern void ret_from_fork(void);
-
- /* Copy registers */
- *childregs = *regs;
-
- childregs->spu = spu;
- childregs->r0 = 0; /* Child gets zero as return value */
- regs->r0 = tsk->pid;
+ extern void ret_from_kernel_thread(void);
+
+ if (unlikely(tsk->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ childregs->psw = M32R_PSW_BIE;
+ childregs->r1 = spu; /* fn */
+ childregs->r0 = arg;
+ tsk->thread.lr = (unsigned long)ret_from_kernel_thread;
+ } else {
+ /* Copy registers */
+ *childregs = *current_pt_regs();
+ if (spu)
+ childregs->spu = spu;
+ childregs->r0 = 0; /* Child gets zero as return value */
+ tsk->thread.lr = (unsigned long)ret_from_fork;
+ }
tsk->thread.sp = (unsigned long)childregs;
- tsk->thread.lr = (unsigned long)ret_from_fork;
return 0;
}
-asmlinkage int sys_fork(unsigned long r0, unsigned long r1, unsigned long r2,
- unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6,
- struct pt_regs regs)
-{
-#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, regs.spu, &regs, 0, NULL, NULL);
-#else
- return -EINVAL;
-#endif /* CONFIG_MMU */
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidptr,
- unsigned long child_tidptr,
- unsigned long r4, unsigned long r5, unsigned long r6,
- struct pt_regs regs)
-{
- if (!newsp)
- newsp = regs.spu;
-
- return do_fork(clone_flags, newsp, &regs, 0,
- (int __user *)parent_tidptr, (int __user *)child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(unsigned long r0, unsigned long r1, unsigned long r2,
- unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6,
- struct pt_regs regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.spu, &regs, 0,
- NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char __user *ufilename,
- const char __user *const __user *uargv,
- const char __user *const __user *uenvp,
- unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, struct pt_regs regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(ufilename);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name, uargv, uenvp, &regs);
- putname(filename);
-out:
- return error;
-}
-
/*
* These bracket the sleeping functions..
*/
diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
index d841fb6cc70..c3fdd632fba 100644
--- a/arch/m32r/kernel/sys_m32r.c
+++ b/arch/m32r/kernel/sys_m32r.c
@@ -88,24 +88,3 @@ asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
/* Not implemented yet. */
return -ENOSYS;
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register long __scno __asm__ ("r7") = __NR_execve;
- register long __arg3 __asm__ ("r2") = (long)(envp);
- register long __arg2 __asm__ ("r1") = (long)(argv);
- register long __res __asm__ ("r0") = (long)(filename);
- __asm__ __volatile__ (
- "trap #" SYSCALL_VECTOR "|| nop"
- : "=r" (__res)
- : "r" (__scno), "0" (__res), "r" (__arg2),
- "r" (__arg3)
- : "memory");
- return __res;
-}
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index e7c161433ea..953a7ba5d05 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -16,6 +16,7 @@ config M68K
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_USES_GETTIMEOFFSET if MMU && !COLDFIRE
select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select MODULES_USE_ELF_RELA
diff --git a/arch/m68k/include/asm/signal.h b/arch/m68k/include/asm/signal.h
index 2df26b57c26..9c8c46b06b0 100644
--- a/arch/m68k/include/asm/signal.h
+++ b/arch/m68k/include/asm/signal.h
@@ -86,11 +86,9 @@ static inline int sigfindinword(unsigned long word)
#endif /* !CONFIG_CPU_HAS_NO_BITFIELDS */
-#ifdef __uClinux__
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-#else
-struct pt_regs;
-extern void ptrace_signal_deliver(struct pt_regs *regs, void *cookie);
+#ifndef __uClinux__
+extern void ptrace_signal_deliver(void);
+#define ptrace_signal_deliver ptrace_signal_deliver
#endif /* __uClinux__ */
#endif /* _M68K_SIGNAL_H */
diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
index 5fc7f7bec1c..a021d67cdd7 100644
--- a/arch/m68k/include/asm/unistd.h
+++ b/arch/m68k/include/asm/unistd.h
@@ -32,7 +32,8 @@
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
-#define __ARCH_WANT_KERNEL_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
/*
* "Conditional" syscalls
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index 946cb018775..a78f5649e8d 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -44,34 +44,29 @@
.globl system_call, buserr, trap, resume
.globl sys_call_table
-.globl sys_fork, sys_clone, sys_vfork
+.globl __sys_fork, __sys_clone, __sys_vfork
.globl ret_from_interrupt, bad_interrupt
.globl auto_irqhandler_fixup
.globl user_irqvec_fixup
.text
-ENTRY(sys_fork)
+ENTRY(__sys_fork)
SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_fork
- addql #4,%sp
- RESTORE_SWITCH_STACK
+ jbsr sys_fork
+ lea %sp@(24),%sp
rts
-ENTRY(sys_clone)
+ENTRY(__sys_clone)
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
jbsr m68k_clone
- addql #4,%sp
- RESTORE_SWITCH_STACK
+ lea %sp@(28),%sp
rts
-ENTRY(sys_vfork)
+ENTRY(__sys_vfork)
SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_vfork
- addql #4,%sp
- RESTORE_SWITCH_STACK
+ jbsr sys_vfork
+ lea %sp@(24),%sp
rts
ENTRY(sys_sigreturn)
@@ -115,16 +110,9 @@ ENTRY(ret_from_kernel_thread)
| a3 contains the kernel thread payload, d7 - its argument
movel %d1,%sp@-
jsr schedule_tail
- GET_CURRENT(%d0)
movel %d7,(%sp)
jsr %a3@
addql #4,%sp
- movel %d0,(%sp)
- jra sys_exit
-
-ENTRY(ret_from_kernel_execve)
- movel 4(%sp), %sp
- GET_CURRENT(%d0)
jra ret_from_exception
#if defined(CONFIG_COLDFIRE) || !defined(CONFIG_MMU)
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index c51bb172e14..d538694ad20 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -136,57 +136,35 @@ void flush_thread(void)
}
/*
- * "m68k_fork()".. By the time we get here, the
- * non-volatile registers have also been saved on the
- * stack. We do some ugly pointer stuff here.. (see
- * also copy_thread)
+ * Why not generic sys_clone, you ask? m68k passes all arguments on stack.
+ * And we need all registers saved, which means a bunch of stuff pushed
+ * on top of pt_regs, which means that sys_clone() arguments would be
+ * buried. We could, of course, copy them, but it's too costly for no
+ * good reason - generic clone() would have to copy them *again* for
+ * do_fork() anyway. So in this case it's actually better to pass pt_regs *
+ * and extract arguments for do_fork() from there. Eventually we might
+ * go for calling do_fork() directly from the wrapper, but only after we
+ * are finished with do_fork() prototype conversion.
*/
-
-asmlinkage int m68k_fork(struct pt_regs *regs)
-{
-#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, rdusp(), regs, 0, NULL, NULL);
-#else
- return -EINVAL;
-#endif
-}
-
-asmlinkage int m68k_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0,
- NULL, NULL);
-}
-
asmlinkage int m68k_clone(struct pt_regs *regs)
{
- unsigned long clone_flags;
- unsigned long newsp;
- int __user *parent_tidptr, *child_tidptr;
-
- /* syscall2 puts clone_flags in d1 and usp in d2 */
- clone_flags = regs->d1;
- newsp = regs->d2;
- parent_tidptr = (int __user *)regs->d3;
- child_tidptr = (int __user *)regs->d4;
- if (!newsp)
- newsp = rdusp();
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tidptr, child_tidptr);
+ /* regs will be equal to current_pt_regs() */
+ return do_fork(regs->d1, regs->d2, 0,
+ (int __user *)regs->d3, (int __user *)regs->d4);
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long arg,
- struct task_struct * p, struct pt_regs * regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs * childregs;
- struct switch_stack *childstack;
+ struct fork_frame {
+ struct switch_stack sw;
+ struct pt_regs regs;
+ } *frame;
- childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
- childstack = ((struct switch_stack *) childregs) - 1;
+ frame = (struct fork_frame *) (task_stack_page(p) + THREAD_SIZE) - 1;
- p->thread.usp = usp;
- p->thread.ksp = (unsigned long)childstack;
- p->thread.esp0 = (unsigned long)childregs;
+ p->thread.ksp = (unsigned long)frame;
+ p->thread.esp0 = (unsigned long)&frame->regs;
/*
* Must save the current SFC/DFC value, NOT the value when
@@ -194,25 +172,24 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
*/
p->thread.fs = get_fs().seg;
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
- memset(childstack, 0,
- sizeof(struct switch_stack) + sizeof(struct pt_regs));
- childregs->sr = PS_S;
- childstack->a3 = usp; /* function */
- childstack->d7 = arg;
- childstack->retpc = (unsigned long)ret_from_kernel_thread;
+ memset(frame, 0, sizeof(struct fork_frame));
+ frame->regs.sr = PS_S;
+ frame->sw.a3 = usp; /* function */
+ frame->sw.d7 = arg;
+ frame->sw.retpc = (unsigned long)ret_from_kernel_thread;
p->thread.usp = 0;
return 0;
}
- *childregs = *regs;
- childregs->d0 = 0;
-
- *childstack = ((struct switch_stack *) regs)[-1];
- childstack->retpc = (unsigned long)ret_from_fork;
+ memcpy(frame, container_of(current_pt_regs(), struct fork_frame, regs),
+ sizeof(struct fork_frame));
+ frame->regs.d0 = 0;
+ frame->sw.retpc = (unsigned long)ret_from_fork;
+ p->thread.usp = usp ?: rdusp();
if (clone_flags & CLONE_SETTLS)
- task_thread_info(p)->tp_value = regs->d5;
+ task_thread_info(p)->tp_value = frame->regs.d5;
#ifdef CONFIG_FPU
if (!FPU_IS_EMU) {
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index 710a528b928..9a396cda314 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -108,8 +108,9 @@ int handle_kernel_fault(struct pt_regs *regs)
return 1;
}
-void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
+void ptrace_signal_deliver(void)
{
+ struct pt_regs *regs = signal_pt_regs();
if (regs->orig_d0 < 0)
return;
switch (regs->d0) {
diff --git a/arch/m68k/kernel/syscalltable.S b/arch/m68k/kernel/syscalltable.S
index 4fc2e29b771..c30da5b3f2d 100644
--- a/arch/m68k/kernel/syscalltable.S
+++ b/arch/m68k/kernel/syscalltable.S
@@ -22,7 +22,7 @@ ALIGN
ENTRY(sys_call_table)
.long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
.long sys_exit
- .long sys_fork
+ .long __sys_fork
.long sys_read
.long sys_write
.long sys_open /* 5 */
@@ -140,7 +140,7 @@ ENTRY(sys_call_table)
.long sys_ipc
.long sys_fsync
.long sys_sigreturn
- .long sys_clone /* 120 */
+ .long __sys_clone /* 120 */
.long sys_setdomainname
.long sys_newuname
.long sys_cacheflush /* modify_ldt for i386 */
@@ -210,7 +210,7 @@ ENTRY(sys_call_table)
.long sys_sendfile
.long sys_ni_syscall /* streams1 */
.long sys_ni_syscall /* streams2 */
- .long sys_vfork /* 190 */
+ .long __sys_vfork /* 190 */
.long sys_getrlimit
.long sys_mmap2
.long sys_truncate64
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 4cba7439f9d..4bcf89148f3 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -26,6 +26,9 @@ config MICROBLAZE
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
+ select CLONE_BACKWARDS
config SWAP
def_bool n
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 2957fcc7176..eb3a46c096f 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -4,3 +4,4 @@ header-y += elf.h
generic-y += clkdev.h
generic-y += exec.h
generic-y += trace_clock.h
+generic-y += syscalls.h
diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
index af2bb965239..0759153e811 100644
--- a/arch/microblaze/include/asm/processor.h
+++ b/arch/microblaze/include/asm/processor.h
@@ -31,6 +31,7 @@ extern const struct seq_operations cpuinfo_op;
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
# endif /* __ASSEMBLY__ */
@@ -78,11 +79,6 @@ extern unsigned long thread_saved_pc(struct task_struct *t);
extern unsigned long get_wchan(struct task_struct *p);
-/*
- * create a kernel thread without removing it from tasklists
- */
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
# define KSTK_EIP(tsk) (0)
# define KSTK_ESP(tsk) (0)
@@ -131,8 +127,6 @@ extern inline void release_thread(struct task_struct *dead_task)
{
}
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
/* Free current thread data structures etc. */
static inline void exit_thread(void)
{
diff --git a/arch/microblaze/include/asm/syscalls.h b/arch/microblaze/include/asm/syscalls.h
deleted file mode 100644
index 27f2f4c0f39..00000000000
--- a/arch/microblaze/include/asm/syscalls.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef __ASM_MICROBLAZE_SYSCALLS_H
-
-asmlinkage long microblaze_vfork(struct pt_regs *regs);
-asmlinkage long microblaze_clone(int flags, unsigned long stack,
- struct pt_regs *regs);
-asmlinkage long microblaze_execve(const char __user *filenamei,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- struct pt_regs *regs);
-
-asmlinkage long sys_clone(int flags, unsigned long stack, struct pt_regs *regs);
-#define sys_clone sys_clone
-
-#include <asm-generic/syscalls.h>
-
-#endif /* __ASM_MICROBLAZE_SYSCALLS_H */
diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h
index 6985e6e9d82..94d978986b7 100644
--- a/arch/microblaze/include/asm/unistd.h
+++ b/arch/microblaze/include/asm/unistd.h
@@ -422,6 +422,12 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_VFORK
+#ifdef CONFIG_MMU
+#define __ARCH_WANT_SYS_FORK
+#endif
/*
* "Conditional" syscalls
diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index 75c3ea1f48a..cb0327f204a 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -474,6 +474,14 @@ ENTRY(ret_from_fork)
brid ret_to_user
nop
+ENTRY(ret_from_kernel_thread)
+ brlid r15, schedule_tail
+ addk r5, r0, r3
+ brald r15, r20
+ addk r5, r0, r19
+ brid ret_to_user
+ addk r3, r0, r0
+
work_pending:
enable_irq
@@ -551,18 +559,6 @@ no_work_pending:
rtid r14, 0
nop
-sys_vfork:
- brid microblaze_vfork
- addk r5, r1, r0
-
-sys_clone:
- brid microblaze_clone
- addk r7, r1, r0
-
-sys_execve:
- brid microblaze_execve
- addk r8, r1, r0
-
sys_rt_sigreturn_wrapper:
brid sys_rt_sigreturn
addk r5, r1, r0
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 03f7b8ce6b6..c217367dfc7 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -293,24 +293,6 @@ C_ENTRY(_user_exception):
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
addi r14, r14, 4 /* return address is 4 byte after call */
- mfs r1, rmsr
- nop
- andi r1, r1, MSR_UMS
- bnei r1, 1f
-
-/* Kernel-mode state save - kernel execve */
- lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
- tophys(r1,r1);
-
- addik r1, r1, -PT_SIZE; /* Make room on the stack. */
- SAVE_REGS
-
- swi r1, r1, PT_MODE; /* pt_regs -> kernel mode */
- brid 2f;
- nop; /* Fill delay slot */
-
-/* User-mode state save. */
-1:
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */
tophys(r1,r1);
lwi r1, r1, TS_THREAD_INFO; /* get stack from task_struct */
@@ -460,18 +442,6 @@ TRAP_return: /* Make global symbol for debugging */
nop;
-/* These syscalls need access to the struct pt_regs on the stack, so we
- implement them in assembly (they're basically all wrappers anyway). */
-
-C_ENTRY(sys_fork_wrapper):
- addi r5, r0, SIGCHLD /* Arg 0: flags */
- lwi r6, r1, PT_R1 /* Arg 1: child SP (use parent's) */
- addik r7, r1, 0 /* Arg 2: parent context */
- add r8, r0, r0 /* Arg 3: (unused) */
- add r9, r0, r0; /* Arg 4: (unused) */
- brid do_fork /* Do real work (tail-call) */
- add r10, r0, r0; /* Arg 5: (unused) */
-
/* This the initial entry point for a new child thread, with an appropriate
stack in place that makes it look the the child is in the middle of an
syscall. This function is actually `returned to' from switch_thread
@@ -479,28 +449,19 @@ C_ENTRY(sys_fork_wrapper):
saved context). */
C_ENTRY(ret_from_fork):
bralid r15, schedule_tail; /* ...which is schedule_tail's arg */
- add r3, r5, r0; /* switch_thread returns the prev task */
+ add r5, r3, r0; /* switch_thread returns the prev task */
/* ( in the delay slot ) */
brid ret_from_trap; /* Do normal trap return */
add r3, r0, r0; /* Child's fork call should return 0. */
-C_ENTRY(sys_vfork):
- brid microblaze_vfork /* Do real work (tail-call) */
- addik r5, r1, 0
-
-C_ENTRY(sys_clone):
- bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */
- lwi r6, r1, PT_R1; /* If so, use paret's stack ptr */
-1: addik r7, r1, 0; /* Arg 2: parent context */
- lwi r9, r1, PT_R8; /* parent tid. */
- lwi r10, r1, PT_R9; /* child tid. */
- /* do_fork will pick up TLS from regs->r10. */
- brid do_fork /* Do real work (tail-call) */
- add r8, r0, r0; /* Arg 3: (unused) */
-
-C_ENTRY(sys_execve):
- brid microblaze_execve; /* Do real work (tail-call).*/
- addik r8, r1, 0; /* add user context as 4th arg */
+C_ENTRY(ret_from_kernel_thread):
+ bralid r15, schedule_tail; /* ...which is schedule_tail's arg */
+ add r5, r3, r0; /* switch_thread returns the prev task */
+ /* ( in the delay slot ) */
+ brald r15, r20 /* fn was left in r20 */
+ addk r5, r0, r19 /* ... and argument - in r19 */
+ brid ret_from_trap
+ add r3, r0, r0
C_ENTRY(sys_rt_sigreturn_wrapper):
brid sys_rt_sigreturn /* Do real work */
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 1944e00f07e..40823fd1db0 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -13,6 +13,7 @@
#include <linux/pm.h>
#include <linux/tick.h>
#include <linux/bitops.h>
+#include <linux/ptrace.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h> /* for USER_DS macros */
#include <asm/cacheflush.h>
@@ -119,46 +120,38 @@ void flush_thread(void)
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct pt_regs *childregs = task_pt_regs(p);
struct thread_info *ti = task_thread_info(p);
- *childregs = *regs;
- if (user_mode(regs))
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ /* if we're creating a new kernel thread then just zeroing all
+ * the registers. That's OK for a brand new thread.*/
+ memset(childregs, 0, sizeof(struct pt_regs));
+ memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
+ ti->cpu_context.r1 = (unsigned long)childregs;
+ ti->cpu_context.r20 = (unsigned long)usp; /* fn */
+ ti->cpu_context.r19 = (unsigned long)arg;
+ childregs->pt_mode = 1;
+ local_save_flags(childregs->msr);
+#ifdef CONFIG_MMU
+ ti->cpu_context.msr = childregs->msr & ~MSR_IE;
+#endif
+ ti->cpu_context.r15 = (unsigned long)ret_from_kernel_thread - 8;
+ return 0;
+ }
+ *childregs = *current_pt_regs();
+ if (usp)
childregs->r1 = usp;
- else
- childregs->r1 = ((unsigned long) ti) + THREAD_SIZE;
-#ifndef CONFIG_MMU
memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
ti->cpu_context.r1 = (unsigned long)childregs;
+#ifndef CONFIG_MMU
ti->cpu_context.msr = (unsigned long)childregs->msr;
#else
+ childregs->msr |= MSR_UMS;
- /* if creating a kernel thread then update the current reg (we don't
- * want to use the parent's value when restoring by POP_STATE) */
- if (kernel_mode(regs))
- /* save new current on stack to use POP_STATE */
- childregs->CURRENT_TASK = (unsigned long)p;
- /* if returning to user then use the parent's value of this register */
-
- /* if we're creating a new kernel thread then just zeroing all
- * the registers. That's OK for a brand new thread.*/
- /* Pls. note that some of them will be restored in POP_STATE */
- if (kernel_mode(regs))
- memset(&ti->cpu_context, 0, sizeof(struct cpu_context));
- /* if this thread is created for fork/vfork/clone, then we want to
- * restore all the parent's context */
- /* in addition to the registers which will be restored by POP_STATE */
- else {
- ti->cpu_context = *(struct cpu_context *)regs;
- childregs->msr |= MSR_UMS;
- }
-
- /* FIXME STATE_SAVE_PT_OFFSET; */
- ti->cpu_context.r1 = (unsigned long)childregs;
/* we should consider the fact that childregs is a copy of the parent
* regs which were saved immediately after entering the kernel state
* before enabling VM. This MSR will be restored in switch_to and
@@ -209,29 +202,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
}
#endif
-static void kernel_thread_helper(int (*fn)(void *), void *arg)
-{
- fn(arg);
- do_exit(-1);
-}
-
-int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
- /* store them in non-volatile registers */
- regs.r5 = (unsigned long)fn;
- regs.r6 = (unsigned long)arg;
- local_save_flags(regs.msr);
- regs.pc = (unsigned long)kernel_thread_helper;
- regs.pt_mode = 1;
-
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
- &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL_GPL(kernel_thread);
-
unsigned long get_wchan(struct task_struct *p)
{
/* TBD (used by procfs) */
@@ -246,6 +216,7 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp)
regs->pt_mode = 0;
#ifdef CONFIG_MMU
regs->msr |= MSR_UMS;
+ regs->msr &= ~MSR_VM;
#endif
}
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
index 404c0f24bd4..63647c586b4 100644
--- a/arch/microblaze/kernel/sys_microblaze.c
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -34,38 +34,6 @@
#include <asm/syscalls.h>
-asmlinkage long microblaze_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
- regs, 0, NULL, NULL);
-}
-
-asmlinkage long microblaze_clone(int flags, unsigned long stack,
- struct pt_regs *regs)
-{
- if (!stack)
- stack = regs->r1;
- return do_fork(flags, stack, regs, 0, NULL, NULL);
-}
-
-asmlinkage long microblaze_execve(const char __user *filenamei,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(filenamei);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
-out:
- return error;
-}
-
asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, off_t pgoff)
@@ -75,24 +43,3 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register const char *__a __asm__("r5") = filename;
- register const void *__b __asm__("r6") = argv;
- register const void *__c __asm__("r7") = envp;
- register unsigned long __syscall __asm__("r12") = __NR_execve;
- register unsigned long __ret __asm__("r3");
- __asm__ __volatile__ ("brki r14, 0x8"
- : "=r" (__ret), "=r" (__syscall)
- : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
- : "r4", "r8", "r9",
- "r10", "r11", "r14", "cc", "memory");
- return __ret;
-}
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 6a2b294ef6d..ff6431e5468 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -2,11 +2,7 @@ ENTRY(sys_call_table)
.long sys_restart_syscall /* 0 - old "setup()" system call,
* used for restarting */
.long sys_exit
-#ifdef CONFIG_MMU
- .long sys_fork_wrapper
-#else
- .long sys_ni_syscall
-#endif
+ .long sys_fork
.long sys_read
.long sys_write
.long sys_open /* 5 */
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index dba9390d37c..4183e62f178 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -40,6 +40,8 @@ config MIPS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select MODULES_USE_ELF_RELA if 64BIT
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
menu "Machine selection"
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 5e33fabe354..d28c41e0887 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -310,8 +310,6 @@ struct task_struct;
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
-extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
extern unsigned long thread_saved_pc(struct task_struct *tsk);
/*
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index 4f5da948a77..cec5e125f7e 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -61,4 +61,10 @@ static inline void die_if_kernel(const char *str, struct pt_regs *regs)
die(str, regs);
}
+#define current_pt_regs() \
+({ \
+ unsigned long sp = (unsigned long)__builtin_frame_address(0); \
+ (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
+})
+
#endif /* _ASM_PTRACE_H */
diff --git a/arch/mips/include/asm/signal.h b/arch/mips/include/asm/signal.h
index 880240dff8b..cf4a08062d1 100644
--- a/arch/mips/include/asm/signal.h
+++ b/arch/mips/include/asm/signal.h
@@ -21,6 +21,4 @@
#include <asm/sigcontext.h>
#include <asm/siginfo.h>
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* _ASM_SIGNAL_H */
diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
index 9e47cc11aa2..b306e2081ca 100644
--- a/arch/mips/include/asm/unistd.h
+++ b/arch/mips/include/asm/unistd.h
@@ -20,6 +20,7 @@
#define __ARCH_OMIT_COMPAT_SYS_GETDENTS64
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_SYS_ALARM
+#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_GETHOSTNAME
#define __ARCH_WANT_SYS_IPC
#define __ARCH_WANT_SYS_PAUSE
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 9b00362f32f..e5786858cdb 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -70,6 +70,12 @@ need_resched:
b need_resched
#endif
+FEXPORT(ret_from_kernel_thread)
+ jal schedule_tail # a0 = struct task_struct *prev
+ move a0, s1
+ jal s0
+ j syscall_exit
+
FEXPORT(ret_from_fork)
jal schedule_tail # a0 = struct task_struct *prev
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 3a21acedf88..7adab86c632 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -3,7 +3,6 @@
*
* Copyright (C) 2000 Silicon Graphics, Inc.
* Written by Ulf Carlsson (ulfc@engr.sgi.com)
- * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
*/
#include <linux/compiler.h>
#include <linux/mm.h>
@@ -77,26 +76,6 @@ out:
return error;
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(compat_ptr(regs.regs[4]));
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = compat_do_execve(filename->name, compat_ptr(regs.regs[5]),
- compat_ptr(regs.regs[6]), &regs);
- putname(filename);
-
-out:
- return error;
-}
-
#define RLIM_INFINITY32 0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
@@ -333,7 +312,7 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs)
/* Use __dummy4 instead of getting it off the stack, so that
syscall() works. */
child_tidptr = (int __user *) __dummy4;
- return do_fork(clone_flags, newsp, &regs, 0,
+ return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c
index 3fc1691110d..2d9304c2b54 100644
--- a/arch/mips/kernel/mips_ksyms.c
+++ b/arch/mips/kernel/mips_ksyms.c
@@ -32,8 +32,6 @@ EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
-EXPORT_SYMBOL(kernel_thread);
-
/*
* Functions that operate on entire pages. Mostly used by memory management.
*/
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index e9a5fd7277f..38097652d62 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -84,6 +84,7 @@ void __noreturn cpu_idle(void)
}
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
{
@@ -113,10 +114,10 @@ void flush_thread(void)
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
- struct pt_regs *childregs;
+ struct pt_regs *childregs, *regs = current_pt_regs();
unsigned long childksp;
p->set_child_tid = p->clear_child_tid = NULL;
@@ -136,19 +137,30 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs = (struct pt_regs *) childksp - 1;
/* Put the stack after the struct pt_regs. */
childksp = (unsigned long) childregs;
+ p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ unsigned long status = p->thread.cp0_status;
+ memset(childregs, 0, sizeof(struct pt_regs));
+ ti->addr_limit = KERNEL_DS;
+ p->thread.reg16 = usp; /* fn */
+ p->thread.reg17 = arg;
+ p->thread.reg29 = childksp;
+ p->thread.reg31 = (unsigned long) ret_from_kernel_thread;
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
+ status = (status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
+ ((status & (ST0_KUC | ST0_IEC)) << 2);
+#else
+ status |= ST0_EXL;
+#endif
+ childregs->cp0_status = status;
+ return 0;
+ }
*childregs = *regs;
childregs->regs[7] = 0; /* Clear error flag */
-
childregs->regs[2] = 0; /* Child gets zero as return value */
+ childregs->regs[29] = usp;
+ ti->addr_limit = USER_DS;
- if (childregs->cp0_status & ST0_CU0) {
- childregs->regs[28] = (unsigned long) ti;
- childregs->regs[29] = childksp;
- ti->addr_limit = KERNEL_DS;
- } else {
- childregs->regs[29] = usp;
- ti->addr_limit = USER_DS;
- }
p->thread.reg29 = (unsigned long) childregs;
p->thread.reg31 = (unsigned long) ret_from_fork;
@@ -156,7 +168,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* New tasks lose permission to use the fpu. This accelerates context
* switching for most programs since they don't use the fpu.
*/
- p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
#ifdef CONFIG_MIPS_MT_SMTC
@@ -222,35 +233,6 @@ int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpr)
}
/*
- * Create a kernel thread
- */
-static void __noreturn kernel_thread_helper(void *arg, int (*fn)(void *))
-{
- do_exit(fn(arg));
-}
-
-long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.regs[4] = (unsigned long) arg;
- regs.regs[5] = (unsigned long) fn;
- regs.cp0_epc = (unsigned long) kernel_thread_helper;
- regs.cp0_status = read_c0_status();
-#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
- regs.cp0_status = (regs.cp0_status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
- ((regs.cp0_status & (ST0_KUC | ST0_IEC)) << 2);
-#else
- regs.cp0_status |= ST0_EXL;
-#endif
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-
-/*
*
*/
struct mips_frame_info {
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 86ec03f0e00..62971914376 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -167,7 +167,7 @@ EXPORT(sysn32_call_table)
PTR sys_getsockopt
PTR sys_clone /* 6055 */
PTR sys_fork
- PTR sys32_execve
+ PTR compat_sys_execve
PTR sys_exit
PTR compat_sys_wait4
PTR sys_kill /* 6060 */
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 53c2d724576..9601be6afa3 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -203,7 +203,7 @@ sys_call_table:
PTR sys_creat
PTR sys_link
PTR sys_unlink /* 4010 */
- PTR sys32_execve
+ PTR compat_sys_execve
PTR sys_chdir
PTR compat_sys_time
PTR sys_mknod
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 2bd561bc05a..201cb76b4df 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -92,7 +92,7 @@ save_static_function(sys_fork);
static int __used noinline
_sys_fork(nabi_no_regargs struct pt_regs regs)
{
- return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
+ return do_fork(SIGCHLD, regs.regs[29], 0, NULL, NULL);
}
save_static_function(sys_clone);
@@ -123,32 +123,10 @@ _sys_clone(nabi_no_regargs struct pt_regs regs)
#else
child_tidptr = (int __user *) regs.regs[8];
#endif
- return do_fork(clone_flags, newsp, &regs, 0,
+ return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname((const char __user *) (long)regs.regs[4]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *) (long)regs.regs[5],
- (const char __user *const __user *) (long)regs.regs[6],
- &regs);
- putname(filename);
-
-out:
- return error;
-}
-
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
struct thread_info *ti = task_thread_info(current);
@@ -313,34 +291,3 @@ asmlinkage void bad_stack(void)
{
do_exit(SIGSEGV);
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register unsigned long __a0 asm("$4") = (unsigned long) filename;
- register unsigned long __a1 asm("$5") = (unsigned long) argv;
- register unsigned long __a2 asm("$6") = (unsigned long) envp;
- register unsigned long __a3 asm("$7");
- unsigned long __v0;
-
- __asm__ volatile (" \n"
- " .set noreorder \n"
- " li $2, %5 # __NR_execve \n"
- " syscall \n"
- " move %0, $2 \n"
- " .set reorder \n"
- : "=&r" (__v0), "=r" (__a3)
- : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
- : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
- "memory");
-
- if (__a3 == 0)
- return __v0;
-
- return -__v0;
-}
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 04669fac117..72471744a91 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -9,6 +9,7 @@ config MN10300
select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
select MODULES_USE_ELF_RELA
config AM33_2
diff --git a/arch/mn10300/include/asm/signal.h b/arch/mn10300/include/asm/signal.h
index f9668ec3040..d280e978079 100644
--- a/arch/mn10300/include/asm/signal.h
+++ b/arch/mn10300/include/asm/signal.h
@@ -45,8 +45,4 @@ struct k_sigaction {
};
#include <asm/sigcontext.h>
-
-struct pt_regs;
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* _ASM_SIGNAL_H */
diff --git a/arch/mn10300/include/asm/unistd.h b/arch/mn10300/include/asm/unistd.h
index 55bbec1887e..cabf8ba73b2 100644
--- a/arch/mn10300/include/asm/unistd.h
+++ b/arch/mn10300/include/asm/unistd.h
@@ -44,7 +44,9 @@
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
-#define __ARCH_WANT_KERNEL_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/mn10300/kernel/entry.S b/arch/mn10300/kernel/entry.S
index 0c631d34c8d..68fcab8f8f6 100644
--- a/arch/mn10300/kernel/entry.S
+++ b/arch/mn10300/kernel/entry.S
@@ -60,13 +60,8 @@ ENTRY(ret_from_kernel_thread)
mov (REG_D0,fp),d0
mov (REG_A0,fp),a0
calls (a0)
- jmp sys_exit
-
-ENTRY(ret_from_kernel_execve)
- add -12,d0 /* pt_regs -> frame */
- mov d0,sp
- GET_THREAD_INFO a2
clr d0
+ mov d0,(REG_D0,fp)
jmp syscall_exit
###############################################################################
diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c
index d0c671b6d9f..eb09f5a552f 100644
--- a/arch/mn10300/kernel/process.c
+++ b/arch/mn10300/kernel/process.c
@@ -206,7 +206,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
*/
int copy_thread(unsigned long clone_flags,
unsigned long c_usp, unsigned long ustk_size,
- struct task_struct *p, struct pt_regs *kregs)
+ struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *c_regs;
@@ -227,7 +227,7 @@ int copy_thread(unsigned long clone_flags,
p->thread.wchan = p->thread.pc;
p->thread.usp = c_usp;
- if (unlikely(!kregs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
memset(c_regs, 0, sizeof(struct pt_regs));
c_regs->a0 = c_usp; /* function */
c_regs->d0 = ustk_size; /* argument */
@@ -236,8 +236,9 @@ int copy_thread(unsigned long clone_flags,
p->thread.pc = (unsigned long) ret_from_kernel_thread;
return 0;
}
- *c_regs = *kregs;
- c_regs->sp = c_usp;
+ *c_regs = *current_pt_regs();
+ if (c_usp)
+ c_regs->sp = c_usp;
c_regs->epsw &= ~EPSW_FE; /* my FPU */
/* the new TLS pointer is passed in as arg #5 to sys_clone() */
@@ -249,30 +250,6 @@ int copy_thread(unsigned long clone_flags,
return 0;
}
-/*
- * clone a process
- * - tlsptr is retrieved by copy_thread() from current_frame()->d3
- */
-asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tidptr, int __user *child_tidptr,
- int __user *tlsptr)
-{
- return do_fork(clone_flags, newsp ?: current_frame()->sp,
- current_frame(), 0, parent_tidptr, child_tidptr);
-}
-
-asmlinkage long sys_fork(void)
-{
- return do_fork(SIGCHLD, current_frame()->sp,
- current_frame(), 0, NULL, NULL);
-}
-
-asmlinkage long sys_vfork(void)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, current_frame()->sp,
- current_frame(), 0, NULL, NULL);
-}
-
unsigned long get_wchan(struct task_struct *p)
{
return p->thread.wchan;
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 05f2ba41ff1..e7f1a2993f7 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -22,6 +22,8 @@ config OPENRISC
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config MMU
def_bool y
diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h
index 43decdbdb2e..33691380608 100644
--- a/arch/openrisc/include/asm/processor.h
+++ b/arch/openrisc/include/asm/processor.h
@@ -81,8 +81,6 @@ struct thread_struct {
#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp)
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
diff --git a/arch/openrisc/include/asm/syscalls.h b/arch/openrisc/include/asm/syscalls.h
index 84a978af44d..8ee816812a9 100644
--- a/arch/openrisc/include/asm/syscalls.h
+++ b/arch/openrisc/include/asm/syscalls.h
@@ -24,4 +24,11 @@ asmlinkage long sys_or1k_atomic(unsigned long type, unsigned long *v1,
#include <asm-generic/syscalls.h>
+asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp,
+ void __user *parent_tid, void __user *child_tid, int tls);
+asmlinkage long __sys_fork(void);
+
+#define sys_clone __sys_clone
+#define sys_fork __sys_fork
+
#endif /* __ASM_OPENRISC_SYSCALLS_H */
diff --git a/arch/openrisc/include/uapi/asm/unistd.h b/arch/openrisc/include/uapi/asm/unistd.h
index 437bdbb61b1..5082b806632 100644
--- a/arch/openrisc/include/uapi/asm/unistd.h
+++ b/arch/openrisc/include/uapi/asm/unistd.h
@@ -20,6 +20,10 @@
#define sys_mmap2 sys_mmap_pgoff
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_CLONE
+
#include <asm-generic/unistd.h>
#define __NR_or1k_atomic __NR_arch_specific_syscall
diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile
index e1ee0fa2bbd..35f92ce51c2 100644
--- a/arch/openrisc/kernel/Makefile
+++ b/arch/openrisc/kernel/Makefile
@@ -5,7 +5,7 @@
extra-y := head.o vmlinux.lds
obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \
- traps.o time.o irq.o entry.o ptrace.o signal.o sys_or32.o \
+ traps.o time.o irq.o entry.o ptrace.o signal.o \
sys_call_table.o
obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S
index ddfcaa828b0..5e5b30601bb 100644
--- a/arch/openrisc/kernel/entry.S
+++ b/arch/openrisc/kernel/entry.S
@@ -894,6 +894,16 @@ ENTRY(ret_from_fork)
l.jal schedule_tail
l.nop
+ /* Check if we are a kernel thread */
+ l.sfeqi r20,0
+ l.bf 1f
+ l.nop
+
+ /* ...we are a kernel thread so invoke the requested callback */
+ l.jalr r20
+ l.or r3,r22,r0
+
+1:
/* _syscall_returns expect r11 to contain return value */
l.lwz r11,PT_GPR11(r1)
@@ -915,26 +925,6 @@ ENTRY(ret_from_fork)
l.j _syscall_return
l.nop
-/* Since syscalls don't save call-clobbered registers, the args to
- * kernel_thread_helper will need to be passed through callee-saved
- * registers and copied to the parameter registers when the thread
- * begins running.
- *
- * See arch/openrisc/kernel/process.c:
- * The args are passed as follows:
- * arg1 (r3) : passed in r20
- * arg2 (r4) : passed in r22
- */
-
-ENTRY(_kernel_thread_helper)
- l.or r3,r20,r0
- l.or r4,r22,r0
- l.movhi r31,hi(kernel_thread_helper)
- l.ori r31,r31,lo(kernel_thread_helper)
- l.jr r31
- l.nop
-
-
/* ========================================================[ switch ] === */
/*
@@ -1044,8 +1034,13 @@ ENTRY(_switch)
/* Unwind stack to pre-switch state */
l.addi r1,r1,(INT_FRAME_SIZE)
- /* Return via the link-register back to where we 'came from', where that can be
- * either schedule() or return_from_fork()... */
+ /* Return via the link-register back to where we 'came from', where
+ * that may be either schedule(), ret_from_fork(), or
+ * ret_from_kernel_thread(). If we are returning to a new thread,
+ * we are expected to have set up the arg to schedule_tail already,
+ * hence we do so here unconditionally:
+ */
+ l.lwz r3,TI_STACK(r3) /* Load 'prev' as schedule_tail arg */
l.jr r9
l.nop
@@ -1076,22 +1071,18 @@ _fork_save_extra_regs_and_call:
l.jr r29
l.sw PT_GPR28(r1),r28
-ENTRY(sys_clone)
- l.movhi r29,hi(_sys_clone)
- l.ori r29,r29,lo(_sys_clone)
+ENTRY(__sys_clone)
+ l.movhi r29,hi(sys_clone)
+ l.ori r29,r29,lo(sys_clone)
l.j _fork_save_extra_regs_and_call
l.addi r7,r1,0
-ENTRY(sys_fork)
- l.movhi r29,hi(_sys_fork)
- l.ori r29,r29,lo(_sys_fork)
+ENTRY(__sys_fork)
+ l.movhi r29,hi(sys_fork)
+ l.ori r29,r29,lo(sys_fork)
l.j _fork_save_extra_regs_and_call
l.addi r3,r1,0
-ENTRY(sys_execve)
- l.j _sys_execve
- l.addi r6,r1,0
-
ENTRY(sys_sigaltstack)
l.j _sys_sigaltstack
l.addi r5,r1,0
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index c35f3ab1a8d..00c233bf0d0 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -109,66 +109,83 @@ void release_thread(struct task_struct *dead_task)
*/
extern asmlinkage void ret_from_fork(void);
+/*
+ * copy_thread
+ * @clone_flags: flags
+ * @usp: user stack pointer or fn for kernel thread
+ * @arg: arg to fn for kernel thread; always NULL for userspace thread
+ * @p: the newly created task
+ * @regs: CPU context to copy for userspace thread; always NULL for kthread
+ *
+ * At the top of a newly initialized kernel stack are two stacked pt_reg
+ * structures. The first (topmost) is the userspace context of the thread.
+ * The second is the kernelspace context of the thread.
+ *
+ * A kernel thread will not be returning to userspace, so the topmost pt_regs
+ * struct can be uninitialized; it _does_ need to exist, though, because
+ * a kernel thread can become a userspace thread by doing a kernel_execve, in
+ * which case the topmost context will be initialized and used for 'returning'
+ * to userspace.
+ *
+ * The second pt_reg struct needs to be initialized to 'return' to
+ * ret_from_fork. A kernel thread will need to set r20 to the address of
+ * a function to call into (with arg in r22); userspace threads need to set
+ * r20 to NULL in which case ret_from_fork will just continue a return to
+ * userspace.
+ *
+ * A kernel thread 'fn' may return; this is effectively what happens when
+ * kernel_execve is called. In that case, the userspace pt_regs must have
+ * been initialized (which kernel_execve takes care of, see start_thread
+ * below); ret_from_fork will then continue its execution causing the
+ * 'kernel thread' to return to userspace as a userspace thread.
+ */
+
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs *childregs;
+ struct pt_regs *userregs;
struct pt_regs *kregs;
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- struct thread_info *ti;
unsigned long top_of_kernel_stack;
top_of_kernel_stack = sp;
p->set_child_tid = p->clear_child_tid = NULL;
- /* Copy registers */
- /* redzone */
- sp -= STACK_FRAME_OVERHEAD;
+ /* Locate userspace context on stack... */
+ sp -= STACK_FRAME_OVERHEAD; /* redzone */
sp -= sizeof(struct pt_regs);
- childregs = (struct pt_regs *)sp;
+ userregs = (struct pt_regs *) sp;
- /* Copy parent registers */
- *childregs = *regs;
+ /* ...and kernel context */
+ sp -= STACK_FRAME_OVERHEAD; /* redzone */
+ sp -= sizeof(struct pt_regs);
+ kregs = (struct pt_regs *)sp;
- if ((childregs->sr & SPR_SR_SM) == 1) {
- /* for kernel thread, set `current_thread_info'
- * and stackptr in new task
- */
- childregs->sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- childregs->gpr[10] = (unsigned long)task_thread_info(p);
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(kregs, 0, sizeof(struct pt_regs));
+ kregs->gpr[20] = usp; /* fn, kernel thread */
+ kregs->gpr[22] = arg;
} else {
- childregs->sp = usp;
- }
-
- childregs->gpr[11] = 0; /* Result from fork() */
+ *userregs = *current_pt_regs();
- /*
- * The way this works is that at some point in the future
- * some task will call _switch to switch to the new task.
- * That will pop off the stack frame created below and start
- * the new task running at ret_from_fork. The new task will
- * do some house keeping and then return from the fork or clone
- * system call, using the stack frame created above.
- */
- /* redzone */
- sp -= STACK_FRAME_OVERHEAD;
- sp -= sizeof(struct pt_regs);
- kregs = (struct pt_regs *)sp;
+ if (usp)
+ userregs->sp = usp;
+ userregs->gpr[11] = 0; /* Result from fork() */
- ti = task_thread_info(p);
- ti->ksp = sp;
+ kregs->gpr[20] = 0; /* Userspace thread */
+ }
- /* kregs->sp must store the location of the 'pre-switch' kernel stack
- * pointer... for a newly forked process, this is simply the top of
- * the kernel stack.
+ /*
+ * _switch wants the kernel stack page in pt_regs->sp so that it
+ * can restore it to thread_info->ksp... see _switch for details.
*/
kregs->sp = top_of_kernel_stack;
- kregs->gpr[3] = (unsigned long)current; /* arg to schedule_tail */
- kregs->gpr[10] = (unsigned long)task_thread_info(p);
kregs->gpr[9] = (unsigned long)ret_from_fork;
+ task_thread_info(p)->ksp = (unsigned long)kregs;
+
return 0;
}
@@ -177,16 +194,14 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
*/
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
{
- unsigned long sr = regs->sr & ~SPR_SR_SM;
+ unsigned long sr = mfspr(SPR_SR) & ~SPR_SR_SM;
set_fs(USER_DS);
- memset(regs->gpr, 0, sizeof(regs->gpr));
+ memset(regs, 0, sizeof(struct pt_regs));
regs->pc = pc;
regs->sr = sr;
regs->sp = sp;
-
-/* printk("start thread, ksp = %lx\n", current_thread_info()->ksp);*/
}
/* Fill in the fpu structure for a core dump. */
@@ -237,74 +252,9 @@ void dump_elf_thread(elf_greg_t *dest, struct pt_regs* regs)
dest[35] = 0;
}
-extern void _kernel_thread_helper(void);
-
-void __noreturn kernel_thread_helper(int (*fn) (void *), void *arg)
-{
- do_exit(fn(arg));
-}
-
-/*
- * Create a kernel thread.
- */
-int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.gpr[20] = (unsigned long)fn;
- regs.gpr[22] = (unsigned long)arg;
- regs.sr = mfspr(SPR_SR);
- regs.pc = (unsigned long)_kernel_thread_helper;
-
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED,
- 0, &regs, 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage long _sys_execve(const char __user *name,
- const char __user * const __user *argv,
- const char __user * const __user *envp,
- struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(name);
- error = PTR_ERR(filename);
-
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
-
-out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
/* TODO */
return 0;
}
-
-int kernel_execve(const char *filename, char *const argv[], char *const envp[])
-{
- register long __res asm("r11") = __NR_execve;
- register long __a asm("r3") = (long)(filename);
- register long __b asm("r4") = (long)(argv);
- register long __c asm("r5") = (long)(envp);
- __asm__ volatile ("l.sys 1"
- : "=r" (__res), "=r"(__a), "=r"(__b), "=r"(__c)
- : "0"(__res), "1"(__a), "2"(__b), "3"(__c)
- : "r6", "r7", "r8", "r12", "r13", "r15",
- "r17", "r19", "r21", "r23", "r25", "r27",
- "r29", "r31");
- __asm__ volatile ("l.nop");
- return __res;
-}
diff --git a/arch/openrisc/kernel/sys_or32.c b/arch/openrisc/kernel/sys_or32.c
deleted file mode 100644
index 57060084c0c..00000000000
--- a/arch/openrisc/kernel/sys_or32.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * OpenRISC sys_or32.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * This file contains various random system calls that
- * have a non-standard calling sequence on some platforms.
- * Since we don't have to do any backwards compatibility, our
- * versions are done in the most "normal" way possible.
- */
-
-#include <linux/errno.h>
-#include <linux/syscalls.h>
-#include <linux/mm.h>
-
-#include <asm/syscalls.h>
-
-/* These are secondary entry points as the primary entry points are defined in
- * entry.S where we add the 'regs' parameter value
- */
-
-asmlinkage long _sys_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tid, int __user *child_tid,
- struct pt_regs *regs)
-{
- long ret;
-
- /* FIXME: Is alignment necessary? */
- /* newsp = ALIGN(newsp, 4); */
-
- if (!newsp)
- newsp = regs->sp;
-
- ret = do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-
- return ret;
-}
-
-asmlinkage int _sys_fork(struct pt_regs *regs)
-{
-#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-#else
- return -EINVAL;
-#endif
-}
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 11def45b98c..e688a2be30f 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -22,6 +22,9 @@ config PARISC
select GENERIC_STRNCPY_FROM_USER
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
+ select CLONE_BACKWARDS
help
The PA-RISC microprocessor is designed by Hewlett-Packard and used
diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index 0e8b7b8ce8a..09b54a57a48 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -326,7 +326,6 @@ struct mm_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern void map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm);
diff --git a/arch/parisc/include/asm/signal.h b/arch/parisc/include/asm/signal.h
index 21abf4fc169..0fdb3c83595 100644
--- a/arch/parisc/include/asm/signal.h
+++ b/arch/parisc/include/asm/signal.h
@@ -34,8 +34,6 @@ struct k_sigaction {
struct sigaction sa;
};
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#include <asm/sigcontext.h>
#endif /* !__ASSEMBLY */
diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index 541639c3f60..1efef41659c 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -163,6 +163,10 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
#endif /* __ASSEMBLY__ */
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 18670a07884..bfb44247d7a 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -708,59 +708,9 @@ ENTRY(end_fault_vector)
.import do_cpu_irq_mask,code
/*
- * r26 = function to be called
- * r25 = argument to pass in
- * r24 = flags for do_fork()
- *
- * Kernel threads don't ever return, so they don't need
- * a true register context. We just save away the arguments
- * for copy_thread/ret_ to properly set up the child.
- */
-
-#define CLONE_VM 0x100 /* Must agree with <linux/sched.h> */
-#define CLONE_UNTRACED 0x00800000
-
- .import do_fork
-ENTRY(__kernel_thread)
- STREG %r2, -RP_OFFSET(%r30)
-
- copy %r30, %r1
- ldo PT_SZ_ALGN(%r30),%r30
-#ifdef CONFIG_64BIT
- /* Yo, function pointers in wide mode are little structs... -PB */
- ldd 24(%r26), %r2
- STREG %r2, PT_GR27(%r1) /* Store childs %dp */
- ldd 16(%r26), %r26
-
- STREG %r22, PT_GR22(%r1) /* save r22 (arg5) */
- copy %r0, %r22 /* user_tid */
-#endif
- STREG %r26, PT_GR26(%r1) /* Store function & argument for child */
- STREG %r25, PT_GR25(%r1)
- ldil L%CLONE_UNTRACED, %r26
- ldo CLONE_VM(%r26), %r26 /* Force CLONE_VM since only init_mm */
- or %r26, %r24, %r26 /* will have kernel mappings. */
- ldi 1, %r25 /* stack_start, signals kernel thread */
- stw %r0, -52(%r30) /* user_tid */
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
- BL do_fork, %r2
- copy %r1, %r24 /* pt_regs */
-
- /* Parent Returns here */
-
- LDREG -PT_SZ_ALGN-RP_OFFSET(%r30), %r2
- ldo -PT_SZ_ALGN(%r30), %r30
- bv %r0(%r2)
- nop
-ENDPROC(__kernel_thread)
-
- /*
* Child Returns here
*
- * copy_thread moved args from temp save area set up above
- * into task save area.
+ * copy_thread moved args into task save area.
*/
ENTRY(ret_from_kernel_thread)
@@ -769,51 +719,17 @@ ENTRY(ret_from_kernel_thread)
BL schedule_tail, %r2
nop
- LDREG TI_TASK-THREAD_SZ_ALGN(%r30), %r1
+ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
LDREG TASK_PT_GR25(%r1), %r26
#ifdef CONFIG_64BIT
LDREG TASK_PT_GR27(%r1), %r27
- LDREG TASK_PT_GR22(%r1), %r22
#endif
LDREG TASK_PT_GR26(%r1), %r1
ble 0(%sr7, %r1)
copy %r31, %r2
-
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
- loadgp /* Thread could have been in a module */
-#endif
-#ifndef CONFIG_64BIT
- b sys_exit
-#else
- load32 sys_exit, %r1
- bv %r0(%r1)
-#endif
- ldi 0, %r26
-ENDPROC(ret_from_kernel_thread)
-
- .import sys_execve, code
-ENTRY(__execve)
- copy %r2, %r15
- copy %r30, %r16
- ldo PT_SZ_ALGN(%r30), %r30
- STREG %r26, PT_GR26(%r16)
- STREG %r25, PT_GR25(%r16)
- STREG %r24, PT_GR24(%r16)
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
- BL sys_execve, %r2
- copy %r16, %r26
-
- cmpib,=,n 0,%r28,intr_return /* forward */
-
- /* yes, this will trap and die. */
- copy %r15, %r2
- copy %r16, %r30
- bv %r0(%r2)
+ b finish_child_return
nop
-ENDPROC(__execve)
+ENDPROC(ret_from_kernel_thread)
/*
@@ -1772,151 +1688,36 @@ dtlb_fault:
LDREG PT_GR18(\regs),%r18
.endm
-ENTRY(sys_fork_wrapper)
+ .macro fork_like name
+ENTRY(sys_\name\()_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
ldo TASK_REGS(%r1),%r1
reg_save %r1
- mfctl %cr27, %r3
- STREG %r3, PT_CR27(%r1)
-
- STREG %r2,-RP_OFFSET(%r30)
- ldo FRAME_SIZE(%r30),%r30
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
-
- /* These are call-clobbered registers and therefore
- also syscall-clobbered (we hope). */
- STREG %r2,PT_GR19(%r1) /* save for child */
- STREG %r30,PT_GR21(%r1)
-
- LDREG PT_GR30(%r1),%r25
- copy %r1,%r24
- BL sys_clone,%r2
- ldi SIGCHLD,%r26
-
- LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
-wrapper_exit:
- ldo -FRAME_SIZE(%r30),%r30 /* get the stackframe */
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1),%r1 /* get pt regs */
-
- LDREG PT_CR27(%r1), %r3
- mtctl %r3, %cr27
- reg_restore %r1
+ mfctl %cr27, %r28
+ b sys_\name
+ STREG %r28, PT_CR27(%r1)
+ENDPROC(sys_\name\()_wrapper)
+ .endm
- /* strace expects syscall # to be preserved in r20 */
- ldi __NR_fork,%r20
- bv %r0(%r2)
- STREG %r20,PT_GR20(%r1)
-ENDPROC(sys_fork_wrapper)
+fork_like clone
+fork_like fork
+fork_like vfork
/* Set the return value for the child */
ENTRY(child_return)
BL schedule_tail, %r2
nop
+finish_child_return:
+ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1
+ ldo TASK_REGS(%r1),%r1 /* get pt regs */
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE-FRAME_SIZE(%r30), %r1
- LDREG TASK_PT_GR19(%r1),%r2
- b wrapper_exit
+ LDREG PT_CR27(%r1), %r3
+ mtctl %r3, %cr27
+ reg_restore %r1
+ b syscall_exit
copy %r0,%r28
ENDPROC(child_return)
-
-ENTRY(sys_clone_wrapper)
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1),%r1 /* get pt regs */
- reg_save %r1
- mfctl %cr27, %r3
- STREG %r3, PT_CR27(%r1)
-
- STREG %r2,-RP_OFFSET(%r30)
- ldo FRAME_SIZE(%r30),%r30
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
-
- /* WARNING - Clobbers r19 and r21, userspace must save these! */
- STREG %r2,PT_GR19(%r1) /* save for child */
- STREG %r30,PT_GR21(%r1)
- BL sys_clone,%r2
- copy %r1,%r24
-
- b wrapper_exit
- LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
-ENDPROC(sys_clone_wrapper)
-
-
-ENTRY(sys_vfork_wrapper)
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1),%r1 /* get pt regs */
- reg_save %r1
- mfctl %cr27, %r3
- STREG %r3, PT_CR27(%r1)
-
- STREG %r2,-RP_OFFSET(%r30)
- ldo FRAME_SIZE(%r30),%r30
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
-
- STREG %r2,PT_GR19(%r1) /* save for child */
- STREG %r30,PT_GR21(%r1)
-
- BL sys_vfork,%r2
- copy %r1,%r26
-
- b wrapper_exit
- LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2
-ENDPROC(sys_vfork_wrapper)
-
-
- .macro execve_wrapper execve
- LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
- ldo TASK_REGS(%r1),%r1 /* get pt regs */
-
- /*
- * Do we need to save/restore r3-r18 here?
- * I don't think so. why would new thread need old
- * threads registers?
- */
-
- /* %arg0 - %arg3 are already saved for us. */
-
- STREG %r2,-RP_OFFSET(%r30)
- ldo FRAME_SIZE(%r30),%r30
-#ifdef CONFIG_64BIT
- ldo -16(%r30),%r29 /* Reference param save area */
-#endif
- BL \execve,%r2
- copy %r1,%arg0
-
- ldo -FRAME_SIZE(%r30),%r30
- LDREG -RP_OFFSET(%r30),%r2
-
- /* If exec succeeded we need to load the args */
-
- ldo -1024(%r0),%r1
- cmpb,>>= %r28,%r1,error_\execve
- copy %r2,%r19
-
-error_\execve:
- bv %r0(%r19)
- nop
- .endm
-
- .import sys_execve
-ENTRY(sys_execve_wrapper)
- execve_wrapper sys_execve
-ENDPROC(sys_execve_wrapper)
-
-#ifdef CONFIG_64BIT
- .import sys32_execve
-ENTRY(sys32_execve_wrapper)
- execve_wrapper sys32_execve
-ENDPROC(sys32_execve_wrapper)
-#endif
-
ENTRY(sys_rt_sigreturn_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
ldo TASK_REGS(%r26),%r26 /* get pt regs */
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index cbc37216bf9..d13507246c5 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -52,6 +52,7 @@
#include <asm/io.h>
#include <asm/asm-offsets.h>
+#include <asm/assembly.h>
#include <asm/pdc.h>
#include <asm/pdc_chassis.h>
#include <asm/pgalloc.h>
@@ -165,23 +166,6 @@ void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
/*
- * Create a kernel thread
- */
-
-extern pid_t __kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
-
- /*
- * FIXME: Once we are sure we don't need any debug here,
- * kernel_thread can become a #define.
- */
-
- return __kernel_thread(fn, arg, flags);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
* Free current thread data structures etc..
*/
void exit_thread(void)
@@ -218,48 +202,11 @@ int dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *r)
return 1;
}
-/* Note that "fork()" is implemented in terms of clone, with
- parameters (SIGCHLD, regs->gr[30], regs). */
-int
-sys_clone(unsigned long clone_flags, unsigned long usp,
- struct pt_regs *regs)
-{
- /* Arugments from userspace are:
- r26 = Clone flags.
- r25 = Child stack.
- r24 = parent_tidptr.
- r23 = Is the TLS storage descriptor
- r22 = child_tidptr
-
- However, these last 3 args are only examined
- if the proper flags are set. */
- int __user *parent_tidptr = (int __user *)regs->gr[24];
- int __user *child_tidptr = (int __user *)regs->gr[22];
-
- /* usp must be word aligned. This also prevents users from
- * passing in the value 1 (which is the signal for a special
- * return for a kernel thread) */
- usp = ALIGN(usp, 4);
-
- /* A zero value for usp means use the current stack */
- if (usp == 0)
- usp = regs->gr[30];
-
- return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);
-}
-
-int
-sys_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->gr[30], regs, 0, NULL, NULL);
-}
-
int
copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, /* in ia64 this is "user_stack_size" */
- struct task_struct * p, struct pt_regs * pregs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs * cregs = &(p->thread.regs);
+ struct pt_regs *cregs = &(p->thread.regs);
void *stack = task_stack_page(p);
/* We have to use void * instead of a function pointer, because
@@ -270,48 +217,39 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
#ifdef CONFIG_HPUX
extern void * const hpux_child_return;
#endif
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(cregs, 0, sizeof(struct pt_regs));
+ if (!usp) /* idle thread */
+ return 0;
- *cregs = *pregs;
-
- /* Set the return value for the child. Note that this is not
- actually restored by the syscall exit path, but we put it
- here for consistency in case of signals. */
- cregs->gr[28] = 0; /* child */
-
- /*
- * We need to differentiate between a user fork and a
- * kernel fork. We can't use user_mode, because the
- * the syscall path doesn't save iaoq. Right now
- * We rely on the fact that kernel_thread passes
- * in zero for usp.
- */
- if (usp == 1) {
/* kernel thread */
- cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN;
/* Must exit via ret_from_kernel_thread in order
* to call schedule_tail()
*/
+ cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
cregs->kpc = (unsigned long) &ret_from_kernel_thread;
/*
* Copy function and argument to be called from
* ret_from_kernel_thread.
*/
#ifdef CONFIG_64BIT
- cregs->gr[27] = pregs->gr[27];
+ cregs->gr[27] = ((unsigned long *)usp)[3];
+ cregs->gr[26] = ((unsigned long *)usp)[2];
+#else
+ cregs->gr[26] = usp;
#endif
- cregs->gr[26] = pregs->gr[26];
- cregs->gr[25] = pregs->gr[25];
+ cregs->gr[25] = arg;
} else {
/* user thread */
- /*
- * Note that the fork wrappers are responsible
- * for setting gr[21].
- */
-
- /* Use same stack depth as parent */
- cregs->ksp = (unsigned long)stack
- + (pregs->gr[21] & (THREAD_SIZE - 1));
- cregs->gr[30] = usp;
+ /* usp must be word aligned. This also prevents users from
+ * passing in the value 1 (which is the signal for a special
+ * return for a kernel thread) */
+ if (usp) {
+ usp = ALIGN(usp, 4);
+ if (likely(usp))
+ cregs->gr[30] = usp;
+ }
+ cregs->ksp = (unsigned long)stack + THREAD_SZ_ALGN + FRAME_SIZE;
if (personality(p->personality) == PER_HPUX) {
#ifdef CONFIG_HPUX
cregs->kpc = (unsigned long) &hpux_child_return;
@@ -323,8 +261,7 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
}
/* Setup thread TLS area from the 4th parameter in clone */
if (clone_flags & CLONE_SETTLS)
- cregs->cr27 = pregs->gr[23];
-
+ cregs->cr27 = cregs->gr[23];
}
return 0;
@@ -335,39 +272,6 @@ unsigned long thread_saved_pc(struct task_struct *t)
return t->thread.regs.kpc;
}
-/*
- * sys_execve() executes a new program.
- */
-
-asmlinkage int sys_execve(struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname((const char __user *) regs->gr[26]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *) regs->gr[25],
- (const char __user *const __user *) regs->gr[24],
- regs);
- putname(filename);
-out:
-
- return error;
-}
-
-extern int __execve(const char *filename,
- const char *const argv[],
- const char *const envp[], struct task_struct *task);
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- return __execve(filename, argv, envp, current);
-}
-
unsigned long
get_wchan(struct task_struct *p)
{
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index bf5b93a885d..9cfdaa19ab6 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -53,28 +53,6 @@
#define DBG(x)
#endif
-/*
- * sys32_execve() executes a new program.
- */
-
-asmlinkage int sys32_execve(struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
- filename = getname((const char __user *) regs->gr[26]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = compat_do_execve(filename->name, compat_ptr(regs->gr[25]),
- compat_ptr(regs->gr[24]), regs);
- putname(filename);
-out:
-
- return error;
-}
-
asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
int r22, int r21, int r20)
{
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index cbf5d59d5d6..54d950b067b 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -66,7 +66,7 @@
ENTRY_SAME(creat)
ENTRY_SAME(link)
ENTRY_SAME(unlink) /* 10 */
- ENTRY_DIFF(execve_wrapper)
+ ENTRY_COMP(execve)
ENTRY_SAME(chdir)
/* See comments in kernel/time.c!!! Maybe we don't need this? */
ENTRY_COMP(time)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a902a5c1c76..951a517a1a0 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -144,6 +144,8 @@ config PPC
select GENERIC_KERNEL_THREAD
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_EXECVE
+ select CLONE_BACKWARDS
config EARLY_PRINTK
bool
diff --git a/arch/powerpc/include/asm/signal.h b/arch/powerpc/include/asm/signal.h
index 189998bb61c..a101637725a 100644
--- a/arch/powerpc/include/asm/signal.h
+++ b/arch/powerpc/include/asm/signal.h
@@ -3,6 +3,4 @@
#include <uapi/asm/signal.h>
-struct pt_regs;
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
#endif /* _ASM_POWERPC_SIGNAL_H */
diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h
index 329db4ec12c..b5308d3e6d3 100644
--- a/arch/powerpc/include/asm/syscalls.h
+++ b/arch/powerpc/include/asm/syscalls.h
@@ -17,15 +17,6 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
asmlinkage unsigned long sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long usp,
- int __user *parent_tidp, void __user *child_threadptr,
- int __user *child_tidp, int p6, struct pt_regs *regs);
-asmlinkage int sys_fork(unsigned long p1, unsigned long p2,
- unsigned long p3, unsigned long p4, unsigned long p5,
- unsigned long p6, struct pt_regs *regs);
-asmlinkage int sys_vfork(unsigned long p1, unsigned long p2,
- unsigned long p3, unsigned long p4, unsigned long p5,
- unsigned long p6, struct pt_regs *regs);
asmlinkage long sys_pipe(int __user *fildes);
asmlinkage long sys_pipe2(int __user *fildes, int flags);
asmlinkage long sys_rt_sigaction(int sig,
diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index 921dce6d844..76fe846ec40 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -56,7 +56,9 @@
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#endif
#define __ARCH_WANT_SYS_EXECVE
-#define __ARCH_WANT_KERNEL_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 9499385676e..d22e73e4618 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -444,11 +444,6 @@ ret_from_kernel_thread:
PPC440EP_ERR42
blrl
li r3,0
- b do_exit # no return
-
- .globl __ret_from_kernel_execve
-__ret_from_kernel_execve:
- addi r1,r3,-STACK_FRAME_OVERHEAD
b ret_from_syscall
/* Traced system call support */
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 56e0ff0878b..e9a906c2723 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -373,17 +373,11 @@ _GLOBAL(ret_from_fork)
_GLOBAL(ret_from_kernel_thread)
bl .schedule_tail
REST_NVGPRS(r1)
- REST_GPR(2,r1)
+ ld r14, 0(r14)
mtlr r14
mr r3,r15
blrl
li r3,0
- b .do_exit # no return
-
-_GLOBAL(__ret_from_kernel_execve)
- addi r1,r3,-STACK_FRAME_OVERHEAD
- li r10,1
- std r10,SOFTE(r1)
b syscall_exit
.section ".toc","aw"
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ba48233500f..81430674e71 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -733,8 +733,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
extern unsigned long dscr_default; /* defined in arch/powerpc/kernel/sysfs.c */
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long arg, struct task_struct *p,
- struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct pt_regs *childregs, *kregs;
extern void ret_from_fork(void);
@@ -745,25 +744,25 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
/* Copy registers */
sp -= sizeof(struct pt_regs);
childregs = (struct pt_regs *) sp;
- if (!regs) {
- /* for kernel thread, set `current' and stackptr in new task */
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ struct thread_info *ti = (void *)task_stack_page(p);
memset(childregs, 0, sizeof(struct pt_regs));
childregs->gpr[1] = sp + sizeof(struct pt_regs);
+ childregs->gpr[14] = usp; /* function */
#ifdef CONFIG_PPC64
- childregs->gpr[14] = *(unsigned long *)usp;
- childregs->gpr[2] = ((unsigned long *)usp)[1],
clear_tsk_thread_flag(p, TIF_32BIT);
-#else
- childregs->gpr[14] = usp; /* function */
- childregs->gpr[2] = (unsigned long) p;
+ childregs->softe = 1;
#endif
childregs->gpr[15] = arg;
p->thread.regs = NULL; /* no user register state */
+ ti->flags |= _TIF_RESTOREALL;
f = ret_from_kernel_thread;
} else {
+ struct pt_regs *regs = current_pt_regs();
CHECK_FULL_REGS(regs);
*childregs = *regs;
- childregs->gpr[1] = usp;
+ if (usp)
+ childregs->gpr[1] = usp;
p->thread.regs = childregs;
childregs->gpr[3] = 0; /* Result from fork() */
if (clone_flags & CLONE_SETTLS) {
@@ -1027,51 +1026,6 @@ int get_unalign_ctl(struct task_struct *tsk, unsigned long adr)
return put_user(tsk->thread.align_ctl, (unsigned int __user *)adr);
}
-#define TRUNC_PTR(x) ((typeof(x))(((unsigned long)(x)) & 0xffffffff))
-
-int sys_clone(unsigned long clone_flags, unsigned long usp,
- int __user *parent_tidp, void __user *child_threadptr,
- int __user *child_tidp, int p6,
- struct pt_regs *regs)
-{
- CHECK_FULL_REGS(regs);
- if (usp == 0)
- usp = regs->gpr[1]; /* stack pointer for child */
-#ifdef CONFIG_PPC64
- if (is_32bit_task()) {
- parent_tidp = TRUNC_PTR(parent_tidp);
- child_tidp = TRUNC_PTR(child_tidp);
- }
-#endif
- return do_fork(clone_flags, usp, regs, 0, parent_tidp, child_tidp);
-}
-
-int sys_fork(unsigned long p1, unsigned long p2, unsigned long p3,
- unsigned long p4, unsigned long p5, unsigned long p6,
- struct pt_regs *regs)
-{
- CHECK_FULL_REGS(regs);
- return do_fork(SIGCHLD, regs->gpr[1], regs, 0, NULL, NULL);
-}
-
-int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3,
- unsigned long p4, unsigned long p5, unsigned long p6,
- struct pt_regs *regs)
-{
- CHECK_FULL_REGS(regs);
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->gpr[1],
- regs, 0, NULL, NULL);
-}
-
-void __ret_from_kernel_execve(struct pt_regs *normal)
-__noreturn;
-
-void ret_from_kernel_execve(struct pt_regs *normal)
-{
- set_thread_flag(TIF_RESTOREALL);
- __ret_from_kernel_execve(normal);
-}
-
static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,
unsigned long nbytes)
{
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d385f396dfe..3cbb8757704 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -138,8 +138,10 @@ config S390
select KTIME_SCALAR if 32BIT
select HAVE_ARCH_SECCOMP_FILTER
select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
+ select CLONE_BACKWARDS2
config SCHED_OMIT_FRAME_POINTER
def_bool y
diff --git a/arch/s390/include/asm/signal.h b/arch/s390/include/asm/signal.h
index bffdbdd5b3d..db7ddfaf5b7 100644
--- a/arch/s390/include/asm/signal.h
+++ b/arch/s390/include/asm/signal.h
@@ -39,6 +39,4 @@ struct k_sigaction {
struct sigaction sa;
};
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index bbbae41fa9a..086bb8eaf6a 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -54,7 +54,9 @@
# define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
# endif
#define __ARCH_WANT_SYS_EXECVE
-#define __ARCH_WANT_KERNEL_EXECVE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index ef46f66bc0d..aa8f2ba6289 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -330,40 +330,18 @@ ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15)
l %r12,__LC_THREAD_INFO
l %r13,__LC_SVC_NEW_PSW+4
- tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
- je 1f
l %r1,BASED(.Lschedule_tail)
basr %r14,%r1 # call schedule_tail
TRACE_IRQS_ON
ssm __LC_SVC_NEW_PSW # reenable interrupts
- j sysc_tracenogo
-
-1: # it's a kernel thread
- st %r15,__PT_R15(%r11) # store stack pointer for new kthread
- l %r1,BASED(.Lschedule_tail)
- basr %r14,%r1 # call schedule_tail
- TRACE_IRQS_ON
- ssm __LC_SVC_NEW_PSW # reenable interrupts
- lm %r9,%r11,__PT_R9(%r11) # load gprs
+ tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
+ jne sysc_tracenogo
+ # it's a kernel thread
+ lm %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter)
la %r2,0(%r10)
basr %r14,%r9
- la %r2,0
- br %r11 # do_exit
-
-#
-# kernel_execve function needs to deal with pt_regs that is not
-# at the usual place
-#
-ENTRY(ret_from_kernel_execve)
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- lr %r15,%r2
- lr %r11,%r2
- ahi %r15,-STACK_FRAME_OVERHEAD
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- l %r12,__LC_THREAD_INFO
- ssm __LC_SVC_NEW_PSW # reenable interrupts
- j sysc_return
+ j sysc_tracenogo
/*
* Program check handler routine
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index d0d3f69a734..d8251b98f17 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -54,10 +54,6 @@ long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
u32 len_low);
-long sys_fork(void);
-long sys_clone(unsigned long newsp, unsigned long clone_flags,
- int __user *parent_tidptr, int __user *child_tidptr);
-long sys_vfork(void);
long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
long sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 07d8de35398..499e95e90f3 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -352,33 +352,17 @@ sysc_tracenogo:
ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15)
lg %r12,__LC_THREAD_INFO
- tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
- je 1f
brasl %r14,schedule_tail
TRACE_IRQS_ON
ssm __LC_SVC_NEW_PSW # reenable interrupts
- j sysc_tracenogo
-1: # it's a kernel thread
- stg %r15,__PT_R15(%r11) # store stack pointer for new kthread
- brasl %r14,schedule_tail
- TRACE_IRQS_ON
- ssm __LC_SVC_NEW_PSW # reenable interrupts
- lmg %r9,%r11,__PT_R9(%r11) # load gprs
+ tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
+ jne sysc_tracenogo
+ # it's a kernel thread
+ lmg %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter)
la %r2,0(%r10)
basr %r14,%r9
- la %r2,0
- br %r11 # do_exit
-
-ENTRY(ret_from_kernel_execve)
- ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
- lgr %r15,%r2
- lgr %r11,%r2
- aghi %r15,-STACK_FRAME_OVERHEAD
- xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
- lg %r12,__LC_THREAD_INFO
- ssm __LC_SVC_NEW_PSW # reenable interrupts
- j sysc_return
+ j sysc_tracenogo
/*
* Program check handler routine
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index cd31ad457a9..536d64579d9 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -117,8 +117,7 @@ void release_thread(struct task_struct *dead_task)
}
int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
- unsigned long arg,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti;
struct fake_frame
@@ -150,7 +149,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
frame->sf.gprs[9] = (unsigned long) frame;
/* Store access registers to kernel stack of new process. */
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
memset(&frame->childregs, 0, sizeof(struct pt_regs));
frame->childregs.psw.mask = psw_kernel_bits | PSW_MASK_DAT |
@@ -164,9 +163,10 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
return 0;
}
- frame->childregs = *regs;
+ frame->childregs = *current_pt_regs();
frame->childregs.gprs[2] = 0; /* child returns 0 on fork. */
- frame->childregs.gprs[15] = new_stackp;
+ if (new_stackp)
+ frame->childregs.gprs[15] = new_stackp;
/* Don't copy runtime instrumentation info */
p->thread.ri_cb = NULL;
@@ -183,57 +183,24 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
sizeof(s390_fp_regs));
/* Set a new TLS ? */
if (clone_flags & CLONE_SETTLS)
- p->thread.acrs[0] = regs->gprs[6];
+ p->thread.acrs[0] = frame->childregs.gprs[6];
#else /* CONFIG_64BIT */
/* Save the fpu registers to new thread structure. */
save_fp_regs(&p->thread.fp_regs);
/* Set a new TLS ? */
if (clone_flags & CLONE_SETTLS) {
+ unsigned long tls = frame->childregs.gprs[6];
if (is_compat_task()) {
- p->thread.acrs[0] = (unsigned int) regs->gprs[6];
+ p->thread.acrs[0] = (unsigned int)tls;
} else {
- p->thread.acrs[0] = (unsigned int)(regs->gprs[6] >> 32);
- p->thread.acrs[1] = (unsigned int) regs->gprs[6];
+ p->thread.acrs[0] = (unsigned int)(tls >> 32);
+ p->thread.acrs[1] = (unsigned int)tls;
}
}
#endif /* CONFIG_64BIT */
return 0;
}
-SYSCALL_DEFINE0(fork)
-{
- struct pt_regs *regs = task_pt_regs(current);
- return do_fork(SIGCHLD, regs->gprs[15], regs, 0, NULL, NULL);
-}
-
-SYSCALL_DEFINE4(clone, unsigned long, newsp, unsigned long, clone_flags,
- int __user *, parent_tidptr, int __user *, child_tidptr)
-{
- struct pt_regs *regs = task_pt_regs(current);
-
- if (!newsp)
- newsp = regs->gprs[15];
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tidptr, child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-SYSCALL_DEFINE0(vfork)
-{
- struct pt_regs *regs = task_pt_regs(current);
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
- regs->gprs[15], regs, 0, NULL, NULL);
-}
-
asmlinkage void execve_tail(void)
{
current->thread.fp_regs.fpc = 0;
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 4f93a431a45..45893390c7d 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -13,6 +13,9 @@ config SCORE
select GENERIC_CLOCKEVENTS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
+ select CLONE_BACKWARDS
choice
prompt "System type"
diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h
index ab3aceb5420..d9a922d8711 100644
--- a/arch/score/include/asm/processor.h
+++ b/arch/score/include/asm/processor.h
@@ -13,7 +13,6 @@ struct task_struct;
*/
extern void (*cpu_wait)(void);
-extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
extern unsigned long thread_saved_pc(struct task_struct *tsk);
extern void start_thread(struct pt_regs *regs,
unsigned long pc, unsigned long sp);
diff --git a/arch/score/include/asm/syscalls.h b/arch/score/include/asm/syscalls.h
index 1dd5e0d6b0c..acaeed68095 100644
--- a/arch/score/include/asm/syscalls.h
+++ b/arch/score/include/asm/syscalls.h
@@ -1,8 +1,6 @@
#ifndef _ASM_SCORE_SYSCALLS_H
#define _ASM_SCORE_SYSCALLS_H
-asmlinkage long score_clone(struct pt_regs *regs);
-asmlinkage long score_execve(struct pt_regs *regs);
asmlinkage long score_sigaltstack(struct pt_regs *regs);
asmlinkage long score_rt_sigreturn(struct pt_regs *regs);
diff --git a/arch/score/include/asm/unistd.h b/arch/score/include/asm/unistd.h
index a862384e9c1..56001c93095 100644
--- a/arch/score/include/asm/unistd.h
+++ b/arch/score/include/asm/unistd.h
@@ -4,5 +4,9 @@
#define __ARCH_WANT_SYSCALL_NO_FLAGS
#define __ARCH_WANT_SYSCALL_OFF_T
#define __ARCH_WANT_SYSCALL_DEPRECATED
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_VFORK
#include <asm-generic/unistd.h>
diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
index 83bb96079c4..1557ca1a295 100644
--- a/arch/score/kernel/entry.S
+++ b/arch/score/kernel/entry.S
@@ -278,6 +278,13 @@ need_resched:
nop
#endif
+ENTRY(ret_from_kernel_thread)
+ bl schedule_tail # r4=struct task_struct *prev
+ nop
+ mv r4, r13
+ brl r12
+ j syscall_exit
+
ENTRY(ret_from_fork)
bl schedule_tail # r4=struct task_struct *prev
@@ -480,16 +487,6 @@ illegal_syscall:
sw r9, [r0, PT_R7]
j syscall_return
-ENTRY(sys_execve)
- mv r4, r0
- la r8, score_execve
- br r8
-
-ENTRY(sys_clone)
- mv r4, r0
- la r8, score_clone
- br r8
-
ENTRY(sys_rt_sigreturn)
mv r4, r0
la r8, score_rt_sigreturn
@@ -499,16 +496,3 @@ ENTRY(sys_sigaltstack)
mv r4, r0
la r8, score_sigaltstack
br r8
-
-#ifdef __ARCH_WANT_SYSCALL_DEPRECATED
-ENTRY(sys_fork)
- mv r4, r0
- la r8, score_fork
- br r8
-
-ENTRY(sys_vfork)
- mv r4, r0
- la r8, score_vfork
- br r8
-#endif /* __ARCH_WANT_SYSCALL_DEPRECATED */
-
diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
index 637970cfd3f..79568466b57 100644
--- a/arch/score/kernel/process.c
+++ b/arch/score/kernel/process.c
@@ -60,6 +60,7 @@ void __noreturn cpu_idle(void)
}
void ret_from_fork(void);
+void ret_from_kernel_thread(void);
void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
{
@@ -86,29 +87,27 @@ void flush_thread(void) {}
* set up the kernel stack and exception frames for a new process
*/
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs = task_pt_regs(p);
+ struct pt_regs *regs = current_pt_regs();
- p->set_child_tid = NULL;
- p->clear_child_tid = NULL;
-
- *childregs = *regs;
- childregs->regs[7] = 0; /* Clear error flag */
- childregs->regs[4] = 0; /* Child gets zero as return value */
- regs->regs[4] = p->pid;
-
- if (childregs->cp0_psr & 0x8) { /* test kernel fork or user fork */
- childregs->regs[0] = usp; /* user fork */
+ p->thread.reg0 = (unsigned long) childregs;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ p->thread->reg12 = usp;
+ p->thread->reg13 = arg;
+ p->thread.reg3 = (unsigned long) ret_from_kernel_thread;
} else {
- childregs->regs[28] = (unsigned long) ti; /* kernel fork */
- childregs->regs[0] = (unsigned long) childregs;
+ *childregs = *current_pt_regs();
+ childregs->regs[7] = 0; /* Clear error flag */
+ childregs->regs[4] = 0; /* Child gets zero as return value */
+ if (usp)
+ childregs->regs[0] = usp; /* user fork */
+ p->thread.reg3 = (unsigned long) ret_from_fork;
}
- p->thread.reg0 = (unsigned long) childregs;
- p->thread.reg3 = (unsigned long) ret_from_fork;
p->thread.cp0_psr = 0;
return 0;
@@ -120,32 +119,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
return 1;
}
-static void __noreturn
-kernel_thread_helper(void *unused0, int (*fn)(void *),
- void *arg, void *unused1)
-{
- do_exit(fn(arg));
-}
-
-/*
- * Create a kernel thread.
- */
-long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.regs[6] = (unsigned long) arg;
- regs.regs[5] = (unsigned long) fn;
- regs.cp0_epc = (unsigned long) kernel_thread_helper;
- regs.cp0_psr = (regs.cp0_psr & ~(0x1|0x4|0x8)) | \
- ((regs.cp0_psr & 0x3) << 2);
-
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, \
- 0, &regs, 0, NULL, NULL);
-}
-
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return task_pt_regs(tsk)->cp0_epc;
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
index d45cf00a335..47c20ba4616 100644
--- a/arch/score/kernel/sys_score.c
+++ b/arch/score/kernel/sys_score.c
@@ -48,92 +48,3 @@ sys_mmap(unsigned long addr, unsigned long len, unsigned long prot,
return -EINVAL;
return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
}
-
-asmlinkage long
-score_fork(struct pt_regs *regs)
-{
- return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL);
-}
-
-/*
- * Clone a task - this clones the calling program thread.
- * This is called indirectly via a small wrapper
- */
-asmlinkage long
-score_clone(struct pt_regs *regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
- int __user *parent_tidptr, *child_tidptr;
-
- clone_flags = regs->regs[4];
- newsp = regs->regs[5];
- if (!newsp)
- newsp = regs->regs[0];
- parent_tidptr = (int __user *)regs->regs[6];
- child_tidptr = (int __user *)regs->regs[8];
-
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tidptr, child_tidptr);
-}
-
-asmlinkage long
-score_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
- regs->regs[0], regs, 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- * This is called indirectly via a small wrapper
- */
-asmlinkage long
-score_execve(struct pt_regs *regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname((char __user*)regs->regs[4]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- return error;
-
- error = do_execve(filename->name,
- (const char __user *const __user *)regs->regs[5],
- (const char __user *const __user *)regs->regs[6],
- regs);
-
- putname(filename);
- return error;
-}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-asmlinkage
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register unsigned long __r4 asm("r4") = (unsigned long) filename;
- register unsigned long __r5 asm("r5") = (unsigned long) argv;
- register unsigned long __r6 asm("r6") = (unsigned long) envp;
- register unsigned long __r7 asm("r7");
-
- __asm__ __volatile__ (" \n"
- "ldi r27, %5 \n"
- "syscall \n"
- "mv %0, r4 \n"
- "mv %1, r7 \n"
- : "=&r" (__r4), "=r" (__r7)
- : "r" (__r4), "r" (__r5), "r" (__r6), "i" (__NR_execve)
- : "r8", "r9", "r10", "r11", "r22", "r23", "r24", "r25",
- "r26", "r27", "memory");
-
- if (__r7 == 0)
- return __r4;
-
- return -__r4;
-}
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index babc2b826c5..8451317eed5 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -40,6 +40,8 @@ config SUPERH
select GENERIC_STRNLEN_USER
select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
help
The SuperH is a RISC processor targeted for use in embedded systems
and consumer electronics; it was also used in the Sega Dreamcast
diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h
index b6311fd2d06..b1320d55ca3 100644
--- a/arch/sh/include/asm/processor_32.h
+++ b/arch/sh/include/asm/processor_32.h
@@ -126,11 +126,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned lo
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
-/*
- * create a kernel thread without removing it from tasklists
- */
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm) do { } while(0)
#define release_segments(mm) do { } while(0)
diff --git a/arch/sh/include/asm/processor_64.h b/arch/sh/include/asm/processor_64.h
index cd6029fb2c0..1ee8946f095 100644
--- a/arch/sh/include/asm/processor_64.h
+++ b/arch/sh/include/asm/processor_64.h
@@ -159,11 +159,6 @@ struct mm_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
-/*
- * create a kernel thread without removing it from tasklists
- */
-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm) do { } while (0)
diff --git a/arch/sh/include/asm/syscalls_32.h b/arch/sh/include/asm/syscalls_32.h
index 6c1fa559753..cc25485996b 100644
--- a/arch/sh/include/asm/syscalls_32.h
+++ b/arch/sh/include/asm/syscalls_32.h
@@ -9,20 +9,6 @@
struct pt_regs;
-asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidptr,
- unsigned long child_tidptr,
- struct pt_regs __regs);
-asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
-asmlinkage int sys_execve(const char __user *ufilename,
- const char __user *const __user *uargv,
- const char __user *const __user *uenvp,
- unsigned long r7, struct pt_regs __regs);
asmlinkage int sys_sigsuspend(old_sigset_t mask);
asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
diff --git a/arch/sh/include/asm/syscalls_64.h b/arch/sh/include/asm/syscalls_64.h
index ee519f41d95..d62e8eb22f7 100644
--- a/arch/sh/include/asm/syscalls_64.h
+++ b/arch/sh/include/asm/syscalls_64.h
@@ -9,23 +9,6 @@
struct pt_regs;
-asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-asmlinkage int sys_execve(const char *ufilename, char **uargv,
- char **uenvp, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs);
-
/* Misc syscall related bits */
asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs);
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h
index 38956dfa76f..43d3f26b2ea 100644
--- a/arch/sh/include/asm/unistd.h
+++ b/arch/sh/include/asm/unistd.h
@@ -28,6 +28,10 @@
# define __ARCH_WANT_SYS_SIGPENDING
# define __ARCH_WANT_SYS_SIGPROCMASK
# define __ARCH_WANT_SYS_RT_SIGACTION
+# define __ARCH_WANT_SYS_EXECVE
+# define __ARCH_WANT_SYS_FORK
+# define __ARCH_WANT_SYS_VFORK
+# define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 88571ff8eee..f259b37874e 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -16,7 +16,7 @@ obj-y := debugtraps.o dma-nommu.o dumpstack.o \
machvec.o nmi_debug.o process.o \
process_$(BITS).o ptrace.o ptrace_$(BITS).o \
reboot.o return_address.o \
- setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
+ setup.o signal_$(BITS).o sys_sh.o \
syscalls_$(BITS).o time.o topology.o traps.o \
traps_$(BITS).o unwinder.o
@@ -25,6 +25,7 @@ obj-y += iomap.o
obj-$(CONFIG_HAS_IOPORT) += ioport.o
endif
+obj-$(CONFIG_SUPERH32) += sys_sh32.o
obj-y += cpu/
obj-$(CONFIG_VSYSCALL) += vsyscall/
obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/sh/kernel/cpu/sh5/entry.S b/arch/sh/kernel/cpu/sh5/entry.S
index 7e605b95592..0c8d0377d40 100644
--- a/arch/sh/kernel/cpu/sh5/entry.S
+++ b/arch/sh/kernel/cpu/sh5/entry.S
@@ -1228,6 +1228,25 @@ ret_from_fork:
pta ret_from_syscall, tr0
blink tr0, ZERO
+.global ret_from_kernel_thread
+ret_from_kernel_thread:
+
+ movi schedule_tail,r5
+ ori r5, 1, r5
+ ptabs r5, tr0
+ blink tr0, LINK
+
+ ld.q SP, FRAME_R(2), r2
+ ld.q SP, FRAME_R(3), r3
+ ptabs r3, tr0
+ blink tr0, LINK
+
+ ld.q SP, FRAME_S(FSPC), r2
+ addi r2, 4, r2 /* Move PC, being pre-execution event */
+ st.q SP, FRAME_S(FSPC), r2
+ pta ret_from_syscall, tr0
+ blink tr0, ZERO
+
syscall_allowed:
/* Use LINK to deflect the exit point, default is syscall_ret */
pta syscall_ret, tr0
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index b96489d8b27..9b6e4beeb29 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -297,6 +297,19 @@ ret_from_fork:
mov r0, r4
bra syscall_exit
nop
+
+ .align 2
+ .globl ret_from_kernel_thread
+ret_from_kernel_thread:
+ mov.l 1f, r8
+ jsr @r8
+ mov r0, r4
+ mov.l @(OFF_R5,r15), r5 ! fn
+ jsr @r5
+ mov.l @(OFF_R4,r15), r4 ! arg
+ bra syscall_exit
+ nop
+
.align 2
1: .long schedule_tail
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index ba7345f37bc..73eb66fc625 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -68,38 +68,6 @@ void show_regs(struct pt_regs * regs)
show_code(regs);
}
-/*
- * Create a kernel thread
- */
-__noreturn void kernel_thread_helper(void *arg, int (*fn)(void *))
-{
- do_exit(fn(arg));
-}
-
-/* Don't use this in BL=1(cli). Or else, CPU resets! */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
- int pid;
-
- memset(&regs, 0, sizeof(regs));
- regs.regs[4] = (unsigned long)arg;
- regs.regs[5] = (unsigned long)fn;
-
- regs.pc = (unsigned long)kernel_thread_helper;
- regs.sr = SR_MD;
-#if defined(CONFIG_SH_FPU)
- regs.sr |= SR_FD;
-#endif
-
- /* Ok, create the new process.. */
- pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
- &regs, 0, NULL, NULL);
-
- return pid;
-}
-EXPORT_SYMBOL(kernel_thread);
-
void start_thread(struct pt_regs *regs, unsigned long new_pc,
unsigned long new_sp)
{
@@ -157,10 +125,10 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
EXPORT_SYMBOL(dump_fpu);
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs;
@@ -177,29 +145,35 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
}
#endif
- childregs = task_pt_regs(p);
- *childregs = *regs;
+ memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
- if (user_mode(regs)) {
- childregs->regs[15] = usp;
- ti->addr_limit = USER_DS;
- } else {
- childregs->regs[15] = (unsigned long)childregs;
+ childregs = task_pt_regs(p);
+ p->thread.sp = (unsigned long) childregs;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ p->thread.pc = (unsigned long) ret_from_kernel_thread;
+ childregs->regs[4] = arg;
+ childregs->regs[5] = usp;
+ childregs->sr = SR_MD;
+#if defined(CONFIG_SH_FPU)
+ childregs->sr |= SR_FD;
+#endif
ti->addr_limit = KERNEL_DS;
ti->status &= ~TS_USEDFPU;
p->fpu_counter = 0;
+ return 0;
}
+ *childregs = *current_pt_regs();
+
+ if (usp)
+ childregs->regs[15] = usp;
+ ti->addr_limit = USER_DS;
if (clone_flags & CLONE_SETTLS)
childregs->gbr = childregs->regs[0];
childregs->regs[0] = 0; /* Set return value for child */
-
- p->thread.sp = (unsigned long) childregs;
p->thread.pc = (unsigned long) ret_from_fork;
-
- memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
-
return 0;
}
@@ -243,74 +217,6 @@ __switch_to(struct task_struct *prev, struct task_struct *next)
return prev;
}
-asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
-{
-#ifdef CONFIG_MMU
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
-#else
- /* fork almost works, enough to trick you into looking elsewhere :-( */
- return -EINVAL;
-#endif
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long parent_tidptr,
- unsigned long child_tidptr,
- struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- if (!newsp)
- newsp = regs->regs[15];
- return do_fork(clone_flags, newsp, regs, 0,
- (int __user *)parent_tidptr,
- (int __user *)child_tidptr);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[15], regs,
- 0, NULL, NULL);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char __user *ufilename,
- const char __user *const __user *uargv,
- const char __user *const __user *uenvp,
- unsigned long r7, struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
- int error;
- struct filename *filename;
-
- filename = getname(ufilename);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name, uargv, uenvp, regs);
- putname(filename);
-out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *p)
{
unsigned long pc;
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index 98a709f0c3c..e611c85144b 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -285,39 +285,6 @@ void show_regs(struct pt_regs *regs)
}
/*
- * Create a kernel thread
- */
-__noreturn void kernel_thread_helper(void *arg, int (*fn)(void *))
-{
- do_exit(fn(arg));
-}
-
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
- regs.regs[2] = (unsigned long)arg;
- regs.regs[3] = (unsigned long)fn;
-
- regs.pc = (unsigned long)kernel_thread_helper;
- regs.sr = (1 << 30);
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
- &regs, 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
-/*
* Free current thread data structures etc..
*/
void exit_thread(void)
@@ -401,26 +368,37 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
EXPORT_SYMBOL(dump_fpu);
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs *childregs;
+ struct pt_regs *childregs, *regs = current_pt_regs();
#ifdef CONFIG_SH_FPU
- if(last_task_used_math == current) {
+ /* can't happen for a kernel thread */
+ if (last_task_used_math == current) {
enable_fpu();
save_fpu(current);
disable_fpu();
last_task_used_math = NULL;
- regs->sr |= SR_FD;
+ current_pt_regs()->sr |= SR_FD;
}
#endif
/* Copy from sh version */
childregs = (struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1;
+ p->thread.sp = (unsigned long) childregs;
- *childregs = *regs;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ childregs->regs[2] = (unsigned long)arg;
+ childregs->regs[3] = (unsigned long)fn;
+ childregs->sr = (1 << 30); /* not user_mode */
+ childregs->sr |= SR_FD; /* Invalidate FPU flag */
+ p->thread.pc = (unsigned long) ret_from_kernel_thread;
+ return 0;
+ }
+ *childregs = *current_pt_regs();
/*
* Sign extend the edited stack.
@@ -428,85 +406,18 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* 32-bit wide and context switch must take care
* of NEFF sign extension.
*/
- if (user_mode(regs)) {
+ if (usp)
childregs->regs[15] = neff_sign_extend(usp);
- p->thread.uregs = childregs;
- } else {
- childregs->regs[15] =
- neff_sign_extend((unsigned long)task_stack_page(p) +
- THREAD_SIZE);
- }
+ p->thread.uregs = childregs;
childregs->regs[9] = 0; /* Set return value for child */
childregs->sr |= SR_FD; /* Invalidate FPU flag */
- p->thread.sp = (unsigned long) childregs;
p->thread.pc = (unsigned long) ret_from_fork;
return 0;
}
-asmlinkage int sys_fork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- return do_fork(SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
-}
-
-asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- if (!newsp)
- newsp = pregs->regs[15];
- return do_fork(clone_flags, newsp, pregs, 0, 0, 0);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-asmlinkage int sys_vfork(unsigned long r2, unsigned long r3,
- unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, pregs->regs[15], pregs, 0, 0, 0);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char *ufilename, char **uargv,
- char **uenvp, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs *pregs)
-{
- int error;
- struct filename *filename;
-
- filename = getname((char __user *)ufilename);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = do_execve(filename->name,
- (const char __user *const __user *)uargv,
- (const char __user *const __user *)uenvp,
- pregs);
- putname(filename);
-out:
- return error;
-}
-
#ifdef CONFIG_FRAME_POINTER
static int in_sh64_switch_to(unsigned long pc)
{
diff --git a/arch/sh/kernel/sys_sh32.c b/arch/sh/kernel/sys_sh32.c
index f56b6fe5c5d..497bab3a040 100644
--- a/arch/sh/kernel/sys_sh32.c
+++ b/arch/sh/kernel/sys_sh32.c
@@ -60,27 +60,3 @@ asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
(u64)len0 << 32 | len1, advice);
#endif
}
-
-#if defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH2A)
-#define SYSCALL_ARG3 "trapa #0x23"
-#else
-#define SYSCALL_ARG3 "trapa #0x13"
-#endif
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register long __sc0 __asm__ ("r3") = __NR_execve;
- register long __sc4 __asm__ ("r4") = (long) filename;
- register long __sc5 __asm__ ("r5") = (long) argv;
- register long __sc6 __asm__ ("r6") = (long) envp;
- __asm__ __volatile__ (SYSCALL_ARG3 : "=z" (__sc0)
- : "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
- : "memory");
- return __sc0;
-}
diff --git a/arch/sh/kernel/sys_sh64.c b/arch/sh/kernel/sys_sh64.c
deleted file mode 100644
index c5a38c4bf41..00000000000
--- a/arch/sh/kernel/sys_sh64.c
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * arch/sh/kernel/sys_sh64.c
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- *
- * This file contains various random system calls that
- * have a non-standard calling sequence on the Linux/SH5
- * platform.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/errno.h>
-#include <linux/rwsem.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/fs.h>
-#include <linux/smp.h>
-#include <linux/sem.h>
-#include <linux/msg.h>
-#include <linux/shm.h>
-#include <linux/stat.h>
-#include <linux/mman.h>
-#include <linux/file.h>
-#include <linux/syscalls.h>
-#include <linux/ipc.h>
-#include <asm/uaccess.h>
-#include <asm/ptrace.h>
-#include <asm/unistd.h>
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- register unsigned long __sc0 __asm__ ("r9") = ((0x13 << 16) | __NR_execve);
- register unsigned long __sc2 __asm__ ("r2") = (unsigned long) filename;
- register unsigned long __sc3 __asm__ ("r3") = (unsigned long) argv;
- register unsigned long __sc4 __asm__ ("r4") = (unsigned long) envp;
- __asm__ __volatile__ ("trapa %1 !\t\t\t execve(%2,%3,%4)"
- : "=r" (__sc0)
- : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) );
- __asm__ __volatile__ ("!dummy %0 %1 %2 %3"
- : : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) : "memory");
- return __sc0;
-}
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 9f2edb5c555..0c7d365fa40 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -41,6 +41,8 @@ config SPARC
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config SPARC32
def_bool !64BIT
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index f74ac9ee33a..c1e01914fd9 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -106,7 +106,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc,
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while(0)
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern unsigned long get_wchan(struct task_struct *);
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index 721e25f0e2e..cce72ce4c33 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -94,6 +94,7 @@ struct thread_struct {
#ifndef __ASSEMBLY__
#include <linux/types.h>
+#include <asm/fpumacro.h>
/* Return saved PC of a blocked thread. */
struct task_struct;
@@ -143,6 +144,10 @@ do { \
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
+ fprs_write(0); \
+ current_thread_info()->xfsr[0] = 0; \
+ current_thread_info()->fpsaved[0] = 0; \
+ regs->tstate &= ~TSTATE_PEF; \
} while (0)
#define start_thread32(regs, pc, sp) \
@@ -183,13 +188,15 @@ do { \
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
+ fprs_write(0); \
+ current_thread_info()->xfsr[0] = 0; \
+ current_thread_info()->fpsaved[0] = 0; \
+ regs->tstate &= ~TSTATE_PEF; \
} while (0)
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while (0)
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
extern unsigned long get_wchan(struct task_struct *task);
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index da43bdc6229..bdfafd7af46 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -32,6 +32,9 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
+#define current_pt_regs() \
+ ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
struct global_reg_snapshot {
unsigned long tstate;
unsigned long tpc;
@@ -55,9 +58,7 @@ union global_cpu_snapshot {
extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
-#define force_successful_syscall_return() \
-do { current_thread_info()->syscall_noerror = 1; \
-} while (0)
+#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) ((regs)->tpc = (val))
@@ -100,6 +101,9 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
+#define current_pt_regs() \
+ ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
diff --git a/arch/sparc/include/asm/signal.h b/arch/sparc/include/asm/signal.h
index d243c2ae02d..77b85850d54 100644
--- a/arch/sparc/include/asm/signal.h
+++ b/arch/sparc/include/asm/signal.h
@@ -26,7 +26,5 @@ struct k_sigaction {
void __user *ka_restorer;
};
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* !(__ASSEMBLY__) */
#endif /* !(__SPARC_SIGNAL_H) */
diff --git a/arch/sparc/include/asm/switch_to_64.h b/arch/sparc/include/asm/switch_to_64.h
index 7923c4a2be3..cad36f56fa0 100644
--- a/arch/sparc/include/asm/switch_to_64.h
+++ b/arch/sparc/include/asm/switch_to_64.h
@@ -23,7 +23,7 @@ do { flush_tlb_pending(); \
/* If you are tempted to conditionalize the following */ \
/* so that ASI is only written if it changes, think again. */ \
__asm__ __volatile__("wr %%g0, %0, %%asi" \
- : : "r" (__thread_flag_byte_ptr(task_thread_info(next))[TI_FLAG_BYTE_CURRENT_DS]));\
+ : : "r" (task_thread_info(next)->current_ds));\
trap_block[current_thread_info()->cpu].thread = \
task_thread_info(next); \
__asm__ __volatile__( \
diff --git a/arch/sparc/include/asm/syscalls.h b/arch/sparc/include/asm/syscalls.h
index 45a43f637a1..bf8972adea1 100644
--- a/arch/sparc/include/asm/syscalls.h
+++ b/arch/sparc/include/asm/syscalls.h
@@ -8,6 +8,4 @@ extern asmlinkage long sparc_do_fork(unsigned long clone_flags,
struct pt_regs *regs,
unsigned long stack_size);
-extern asmlinkage int sparc_execve(struct pt_regs *regs);
-
#endif /* _SPARC64_SYSCALLS_H */
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index a3fe4dcc0aa..269bd92313d 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -14,12 +14,12 @@
#define TI_FLAG_FAULT_CODE_SHIFT 56
#define TI_FLAG_BYTE_WSTATE 1
#define TI_FLAG_WSTATE_SHIFT 48
-#define TI_FLAG_BYTE_CWP 2
-#define TI_FLAG_CWP_SHIFT 40
-#define TI_FLAG_BYTE_CURRENT_DS 3
-#define TI_FLAG_CURRENT_DS_SHIFT 32
-#define TI_FLAG_BYTE_FPDEPTH 4
-#define TI_FLAG_FPDEPTH_SHIFT 24
+#define TI_FLAG_BYTE_NOERROR 2
+#define TI_FLAG_BYTE_NOERROR_SHIFT 40
+#define TI_FLAG_BYTE_FPDEPTH 3
+#define TI_FLAG_FPDEPTH_SHIFT 32
+#define TI_FLAG_BYTE_CWP 4
+#define TI_FLAG_CWP_SHIFT 24
#define TI_FLAG_BYTE_WSAVED 5
#define TI_FLAG_WSAVED_SHIFT 16
@@ -47,7 +47,7 @@ struct thread_info {
struct exec_domain *exec_domain;
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u8 new_child;
- __u8 syscall_noerror;
+ __u8 current_ds;
__u16 cpu;
unsigned long *utraps;
@@ -74,9 +74,9 @@ struct thread_info {
#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
-#define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
+#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
#define TI_FPSAVED 0x00000010
#define TI_KSP 0x00000018
#define TI_FAULT_ADDR 0x00000020
@@ -84,7 +84,7 @@ struct thread_info {
#define TI_EXEC_DOMAIN 0x00000030
#define TI_PRE_COUNT 0x00000038
#define TI_NEW_CHILD 0x0000003c
-#define TI_SYS_NOERROR 0x0000003d
+#define TI_CURRENT_DS 0x0000003d
#define TI_CPU 0x0000003e
#define TI_UTRAPS 0x00000040
#define TI_REG_WINDOW 0x00000048
@@ -121,7 +121,7 @@ struct thread_info {
#define INIT_THREAD_INFO(tsk) \
{ \
.task = &tsk, \
- .flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \
+ .current_ds = ASI_P, \
.exec_domain = &default_exec_domain, \
.preempt_count = INIT_PREEMPT_COUNT, \
.restart_block = { \
@@ -153,13 +153,12 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
-#define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
-#define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
+#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
+#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
-
#endif /* !(__ASSEMBLY__) */
/*
diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h
index 73083e1d38d..e562d3caee5 100644
--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -38,14 +38,14 @@
#define VERIFY_READ 0
#define VERIFY_WRITE 1
-#define get_fs() ((mm_segment_t) { get_thread_current_ds() })
+#define get_fs() ((mm_segment_t){(current_thread_info()->current_ds)})
#define get_ds() (KERNEL_DS)
#define segment_eq(a,b) ((a).seg == (b).seg)
#define set_fs(val) \
do { \
- set_thread_current_ds((val).seg); \
+ current_thread_info()->current_ds =(val).seg; \
__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \
} while(0)
diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h
index 0ecea6ed943..c3e5d8b6417 100644
--- a/arch/sparc/include/asm/unistd.h
+++ b/arch/sparc/include/asm/unistd.h
@@ -46,6 +46,7 @@
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#endif
+#define __ARCH_WANT_SYS_EXECVE
/*
* "Conditional" syscalls
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index dcaa1cf0de4..21fd1a8f47d 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -806,23 +806,10 @@ sys_nis_syscall:
call c_sys_nis_syscall
mov %l5, %o7
- .align 4
- .globl sys_execve
-sys_execve:
- mov %o7, %l5
- add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
- call sparc_execve
- mov %l5, %o7
-
- .globl sunos_execv
sunos_execv:
- st %g0, [%sp + STACKFRAME_SZ + PT_I2]
-
- call sparc_execve
- add %sp, STACKFRAME_SZ, %o0
-
- b ret_sys_call
- ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl sunos_execv
+ b sys_execve
+ clr %i2
.align 4
.globl sys_sparc_pipe
@@ -959,17 +946,9 @@ flush_patch_four:
.align 4
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
- b syscall_is_too_hard
+ b do_syscall
or %l7, %lo(sys_ni_syscall), %l7
-linux_fast_syscall:
- andn %l7, 3, %l7
- mov %i0, %o0
- mov %i1, %o1
- mov %i2, %o2
- jmpl %l7 + %g0, %g0
- mov %i3, %o3
-
linux_syscall_trace:
add %sp, STACKFRAME_SZ, %o0
call syscall_trace
@@ -991,6 +970,23 @@ ret_from_fork:
b ret_sys_call
ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl ret_from_kernel_thread
+ret_from_kernel_thread:
+ call schedule_tail
+ ld [%g3 + TI_TASK], %o0
+ ld [%sp + STACKFRAME_SZ + PT_G1], %l0
+ call %l0
+ ld [%sp + STACKFRAME_SZ + PT_G2], %o0
+ rd %psr, %l1
+ ld [%sp + STACKFRAME_SZ + PT_PSR], %l0
+ andn %l0, PSR_CWP, %l0
+ nop
+ and %l1, PSR_CWP, %l1
+ or %l0, %l1, %l0
+ st %l0, [%sp + STACKFRAME_SZ + PT_PSR]
+ b ret_sys_call
+ mov 0, %o0
+
/* Linux native system calls enter here... */
.align 4
.globl linux_sparc_syscall
@@ -1002,11 +998,8 @@ linux_sparc_syscall:
bgeu linux_sparc_ni_syscall
sll %g1, 2, %l4
ld [%l7 + %l4], %l7
- andcc %l7, 1, %g0
- bne linux_fast_syscall
- /* Just do first insn from SAVE_ALL in the delay slot */
-syscall_is_too_hard:
+do_syscall:
SAVE_ALL_HEAD
rd %wim, %l3
diff --git a/arch/sparc/kernel/etrap_64.S b/arch/sparc/kernel/etrap_64.S
index 786b185e6e3..1276ca2567b 100644
--- a/arch/sparc/kernel/etrap_64.S
+++ b/arch/sparc/kernel/etrap_64.S
@@ -92,8 +92,10 @@ etrap_save: save %g2, -STACK_BIAS, %sp
rdpr %wstate, %g2
wrpr %g0, 0, %canrestore
sll %g2, 3, %g2
+
+ /* Set TI_SYS_FPDEPTH to 1 and clear TI_SYS_NOERROR. */
mov 1, %l5
- stb %l5, [%l6 + TI_FPDEPTH]
+ sth %l5, [%l6 + TI_SYS_NOERROR]
wrpr %g3, 0, %otherwin
wrpr %g2, 0, %wstate
@@ -152,7 +154,9 @@ etrap_save: save %g2, -STACK_BIAS, %sp
add %l6, TI_FPSAVED + 1, %l4
srl %l5, 1, %l3
add %l5, 2, %l5
- stb %l5, [%l6 + TI_FPDEPTH]
+
+ /* Set TI_SYS_FPDEPTH to %l5 and clear TI_SYS_NOERROR. */
+ sth %l5, [%l6 + TI_SYS_NOERROR]
ba,pt %xcc, 2b
stb %g0, [%l4 + %l3]
nop
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 487bffb36f5..be8e862bada 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -286,8 +286,7 @@ asmlinkage int sparc_do_fork(unsigned long clone_flags,
parent_tid_ptr = regs->u_regs[UREG_I2];
child_tid_ptr = regs->u_regs[UREG_I4];
- ret = do_fork(clone_flags, stack_start,
- regs, stack_size,
+ ret = do_fork(clone_flags, stack_start, stack_size,
(int __user *) parent_tid_ptr,
(int __user *) child_tid_ptr);
@@ -316,13 +315,13 @@ asmlinkage int sparc_do_fork(unsigned long clone_flags,
* XXX See comment above sys_vfork in sparc64. todo.
*/
extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *ti = task_thread_info(p);
- struct pt_regs *childregs;
+ struct pt_regs *childregs, *regs = current_pt_regs();
char *new_stack;
#ifndef CONFIG_SMP
@@ -336,16 +335,13 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
}
/*
- * p->thread_info new_stack childregs
- * ! ! ! {if(PSR_PS) }
- * V V (stk.fr.) V (pt_regs) { (stk.fr.) }
- * +----- - - - - - ------+===========+============={+==========}+
+ * p->thread_info new_stack childregs stack bottom
+ * ! ! ! !
+ * V V (stk.fr.) V (pt_regs) V
+ * +----- - - - - - ------+===========+=============+
*/
new_stack = task_stack_page(p) + THREAD_SIZE;
- if (regs->psr & PSR_PS)
- new_stack -= STACKFRAME_SZ;
new_stack -= STACKFRAME_SZ + TRACEREG_SZ;
- memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ);
childregs = (struct pt_regs *) (new_stack + STACKFRAME_SZ);
/*
@@ -356,55 +352,58 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
* Thus, kpsr|=PSR_PIL.
*/
ti->ksp = (unsigned long) new_stack;
+ p->thread.kregs = childregs;
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ extern int nwindows;
+ unsigned long psr;
+ memset(new_stack, 0, STACKFRAME_SZ + TRACEREG_SZ);
+ p->thread.flags |= SPARC_FLAG_KTHREAD;
+ p->thread.current_ds = KERNEL_DS;
+ ti->kpc = (((unsigned long) ret_from_kernel_thread) - 0x8);
+ childregs->u_regs[UREG_G1] = sp; /* function */
+ childregs->u_regs[UREG_G2] = arg;
+ psr = childregs->psr = get_psr();
+ ti->kpsr = psr | PSR_PIL;
+ ti->kwim = 1 << (((psr & PSR_CWP) + 1) % nwindows);
+ return 0;
+ }
+ memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ);
+ childregs->u_regs[UREG_FP] = sp;
+ p->thread.flags &= ~SPARC_FLAG_KTHREAD;
+ p->thread.current_ds = USER_DS;
ti->kpc = (((unsigned long) ret_from_fork) - 0x8);
ti->kpsr = current->thread.fork_kpsr | PSR_PIL;
ti->kwim = current->thread.fork_kwim;
- if(regs->psr & PSR_PS) {
- extern struct pt_regs fake_swapper_regs;
+ if (sp != regs->u_regs[UREG_FP]) {
+ struct sparc_stackf __user *childstack;
+ struct sparc_stackf __user *parentstack;
- p->thread.kregs = &fake_swapper_regs;
- new_stack += STACKFRAME_SZ + TRACEREG_SZ;
- childregs->u_regs[UREG_FP] = (unsigned long) new_stack;
- p->thread.flags |= SPARC_FLAG_KTHREAD;
- p->thread.current_ds = KERNEL_DS;
- memcpy(new_stack, (void *)regs->u_regs[UREG_FP], STACKFRAME_SZ);
- childregs->u_regs[UREG_G6] = (unsigned long) ti;
- } else {
- p->thread.kregs = childregs;
- childregs->u_regs[UREG_FP] = sp;
- p->thread.flags &= ~SPARC_FLAG_KTHREAD;
- p->thread.current_ds = USER_DS;
-
- if (sp != regs->u_regs[UREG_FP]) {
- struct sparc_stackf __user *childstack;
- struct sparc_stackf __user *parentstack;
-
- /*
- * This is a clone() call with supplied user stack.
- * Set some valid stack frames to give to the child.
- */
- childstack = (struct sparc_stackf __user *)
- (sp & ~0xfUL);
- parentstack = (struct sparc_stackf __user *)
- regs->u_regs[UREG_FP];
+ /*
+ * This is a clone() call with supplied user stack.
+ * Set some valid stack frames to give to the child.
+ */
+ childstack = (struct sparc_stackf __user *)
+ (sp & ~0xfUL);
+ parentstack = (struct sparc_stackf __user *)
+ regs->u_regs[UREG_FP];
#if 0
- printk("clone: parent stack:\n");
- show_stackframe(parentstack);
+ printk("clone: parent stack:\n");
+ show_stackframe(parentstack);
#endif
- childstack = clone_stackframe(childstack, parentstack);
- if (!childstack)
- return -EFAULT;
+ childstack = clone_stackframe(childstack, parentstack);
+ if (!childstack)
+ return -EFAULT;
#if 0
- printk("clone: child stack:\n");
- show_stackframe(childstack);
+ printk("clone: child stack:\n");
+ show_stackframe(childstack);
#endif
- childregs->u_regs[UREG_FP] = (unsigned long)childstack;
- }
+ childregs->u_regs[UREG_FP] = (unsigned long)childstack;
}
#ifdef CONFIG_SMP
@@ -475,69 +474,6 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
return 1;
}
-/*
- * sparc_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage int sparc_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* Check for indirect call. */
- if(regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname((char __user *)regs->u_regs[base + UREG_I0]);
- error = PTR_ERR(filename);
- if(IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I1],
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I2],
- regs);
- putname(filename);
-out:
- return error;
-}
-
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
-
- __asm__ __volatile__("mov %4, %%g2\n\t" /* Set aside fn ptr... */
- "mov %5, %%g3\n\t" /* and arg. */
- "mov %1, %%g1\n\t"
- "mov %2, %%o0\n\t" /* Clone flags. */
- "mov 0, %%o1\n\t" /* usp arg == 0 */
- "t 0x10\n\t" /* Linux/Sparc clone(). */
- "cmp %%o1, 0\n\t"
- "be 1f\n\t" /* The parent, just return. */
- " nop\n\t" /* Delay slot. */
- "jmpl %%g2, %%o7\n\t" /* Call the function. */
- " mov %%g3, %%o0\n\t" /* Get back the arg in delay. */
- "mov %3, %%g1\n\t"
- "t 0x10\n\t" /* Linux/Sparc exit(). */
- /* Notreached by child. */
- "1: mov %%o0, %0\n\t" :
- "=r" (retval) :
- "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
- "i" (__NR_exit), "r" (fn), "r" (arg) :
- "g1", "g2", "g3", "o0", "o1", "memory", "cc");
- return retval;
-}
-EXPORT_SYMBOL(kernel_thread);
-
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index c6e0c291004..cdb80b2adbe 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -601,8 +601,7 @@ asmlinkage long sparc_do_fork(unsigned long clone_flags,
child_tid_ptr = (int __user *) regs->u_regs[UREG_I4];
}
- ret = do_fork(clone_flags, stack_start,
- regs, stack_size,
+ ret = do_fork(clone_flags, stack_start, stack_size,
parent_tid_ptr, child_tid_ptr);
/* If we get an error and potentially restart the system
@@ -622,64 +621,55 @@ asmlinkage long sparc_do_fork(unsigned long clone_flags,
* Child --> %o0 == parents pid, %o1 == 1
*/
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long unused,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct thread_info *t = task_thread_info(p);
+ struct pt_regs *regs = current_pt_regs();
struct sparc_stackf *parent_sf;
unsigned long child_stack_sz;
char *child_trap_frame;
- int kernel_thread;
-
- kernel_thread = (regs->tstate & TSTATE_PRIV) ? 1 : 0;
- parent_sf = ((struct sparc_stackf *) regs) - 1;
/* Calculate offset to stack_frame & pt_regs */
- child_stack_sz = ((STACKFRAME_SZ + TRACEREG_SZ) +
- (kernel_thread ? STACKFRAME_SZ : 0));
+ child_stack_sz = (STACKFRAME_SZ + TRACEREG_SZ);
child_trap_frame = (task_stack_page(p) +
(THREAD_SIZE - child_stack_sz));
- memcpy(child_trap_frame, parent_sf, child_stack_sz);
- t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) |
- (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
- (((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
t->new_child = 1;
t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
t->kregs = (struct pt_regs *) (child_trap_frame +
sizeof(struct sparc_stackf));
t->fpsaved[0] = 0;
- if (kernel_thread) {
- struct sparc_stackf *child_sf = (struct sparc_stackf *)
- (child_trap_frame + (STACKFRAME_SZ + TRACEREG_SZ));
-
- /* Zero terminate the stack backtrace. */
- child_sf->fp = NULL;
- t->kregs->u_regs[UREG_FP] =
- ((unsigned long) child_sf) - STACK_BIAS;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(child_trap_frame, 0, child_stack_sz);
+ __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP] =
+ (current_pt_regs()->tstate + 1) & TSTATE_CWP;
+ t->current_ds = ASI_P;
+ t->kregs->u_regs[UREG_G1] = sp; /* function */
+ t->kregs->u_regs[UREG_G2] = arg;
+ return 0;
+ }
- t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
- t->kregs->u_regs[UREG_G6] = (unsigned long) t;
- t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;
- } else {
- if (t->flags & _TIF_32BIT) {
- sp &= 0x00000000ffffffffUL;
- regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
- }
- t->kregs->u_regs[UREG_FP] = sp;
- t->flags |= ((long)ASI_AIUS << TI_FLAG_CURRENT_DS_SHIFT);
- if (sp != regs->u_regs[UREG_FP]) {
- unsigned long csp;
-
- csp = clone_stackframe(sp, regs->u_regs[UREG_FP]);
- if (!csp)
- return -EFAULT;
- t->kregs->u_regs[UREG_FP] = csp;
- }
- if (t->utraps)
- t->utraps[0]++;
+ parent_sf = ((struct sparc_stackf *) regs) - 1;
+ memcpy(child_trap_frame, parent_sf, child_stack_sz);
+ if (t->flags & _TIF_32BIT) {
+ sp &= 0x00000000ffffffffUL;
+ regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
}
+ t->kregs->u_regs[UREG_FP] = sp;
+ __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP] =
+ (regs->tstate + 1) & TSTATE_CWP;
+ t->current_ds = ASI_AIUS;
+ if (sp != regs->u_regs[UREG_FP]) {
+ unsigned long csp;
+
+ csp = clone_stackframe(sp, regs->u_regs[UREG_FP]);
+ if (!csp)
+ return -EFAULT;
+ t->kregs->u_regs[UREG_FP] = csp;
+ }
+ if (t->utraps)
+ t->utraps[0]++;
/* Set the return value for the child. */
t->kregs->u_regs[UREG_I0] = current->pid;
@@ -694,45 +684,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
return 0;
}
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
-
- /* If the parent runs before fn(arg) is called by the child,
- * the input registers of this function can be clobbered.
- * So we stash 'fn' and 'arg' into global registers which
- * will not be modified by the parent.
- */
- __asm__ __volatile__("mov %4, %%g2\n\t" /* Save FN into global */
- "mov %5, %%g3\n\t" /* Save ARG into global */
- "mov %1, %%g1\n\t" /* Clone syscall nr. */
- "mov %2, %%o0\n\t" /* Clone flags. */
- "mov 0, %%o1\n\t" /* usp arg == 0 */
- "t 0x6d\n\t" /* Linux/Sparc clone(). */
- "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
- " mov %%o0, %0\n\t"
- "jmpl %%g2, %%o7\n\t" /* Call the function. */
- " mov %%g3, %%o0\n\t" /* Set arg in delay. */
- "mov %3, %%g1\n\t"
- "t 0x6d\n\t" /* Linux/Sparc exit(). */
- /* Notreached by child. */
- "1:" :
- "=r" (retval) :
- "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
- "i" (__NR_exit), "r" (fn), "r" (arg) :
- "g1", "g2", "g3", "o0", "o1", "memory", "cc");
- return retval;
-}
-EXPORT_SYMBOL(kernel_thread);
-
typedef struct {
union {
unsigned int pr_regs[32];
@@ -799,41 +750,6 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
}
EXPORT_SYMBOL(dump_fpu);
-/*
- * sparc_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage int sparc_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* User register window flush is done by entry.S */
-
- /* Check for indirect call. */
- if (regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname((char __user *)regs->u_regs[base + UREG_I0]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I1],
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I2], regs);
- putname(filename);
- if (!error) {
- fprs_write(0);
- current_thread_info()->xfsr[0] = 0;
- current_thread_info()->fpsaved[0] = 0;
- regs->tstate &= ~TSTATE_PEF;
- }
-out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
index c3239811a1b..03c7e929ec3 100644
--- a/arch/sparc/kernel/sys_sparc32.c
+++ b/arch/sparc/kernel/sys_sparc32.c
@@ -396,42 +396,6 @@ asmlinkage long compat_sys_rt_sigaction(int sig,
return ret;
}
-/*
- * sparc32_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage long sparc32_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* User register window flush is done by entry.S */
-
- /* Check for indirect call. */
- if ((u32)regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = compat_do_execve(filename->name,
- compat_ptr(regs->u_regs[base + UREG_I1]),
- compat_ptr(regs->u_regs[base + UREG_I2]), regs);
-
- putname(filename);
-
- if (!error) {
- fprs_write(0);
- current_thread_info()->xfsr[0] = 0;
- current_thread_info()->fpsaved[0] = 0;
- regs->tstate &= ~TSTATE_PEF;
- }
-out:
- return error;
-}
-
#ifdef CONFIG_MODULES
asmlinkage long sys32_init_module(void __user *umod, u32 len,
diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
index 57277c83015..2da0bdcae52 100644
--- a/arch/sparc/kernel/sys_sparc_32.c
+++ b/arch/sparc/kernel/sys_sparc_32.c
@@ -249,27 +249,3 @@ out:
up_read(&uts_sem);
return err;
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- long __res;
- register long __g1 __asm__ ("g1") = __NR_execve;
- register long __o0 __asm__ ("o0") = (long)(filename);
- register long __o1 __asm__ ("o1") = (long)(argv);
- register long __o2 __asm__ ("o2") = (long)(envp);
- asm volatile ("t 0x10\n\t"
- "bcc 1f\n\t"
- "mov %%o0, %0\n\t"
- "sub %%g0, %%o0, %0\n\t"
- "1:\n\t"
- : "=r" (__res), "=&r" (__o0)
- : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
- : "cc");
- return __res;
-}
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 97309c0ec53..708bc29d36a 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -646,28 +646,6 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
return ret;
}
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- long __res;
- register long __g1 __asm__ ("g1") = __NR_execve;
- register long __o0 __asm__ ("o0") = (long)(filename);
- register long __o1 __asm__ ("o1") = (long)(argv);
- register long __o2 __asm__ ("o2") = (long)(envp);
- asm volatile ("t 0x6d\n\t"
- "sub %%g0, %%o0, %0\n\t"
- "movcc %%xcc, %%o0, %0\n\t"
- : "=r" (__res), "=&r" (__o0)
- : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
- : "cc");
- return __res;
-}
-
asmlinkage long sys_kern_features(void)
{
return KERN_FEATURE_MIXED_MODE_STACK;
diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index bf2347794e3..e0fed7711a9 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -1,23 +1,19 @@
/* SunOS's execv() call only specifies the argv argument, the
* environment settings are the same as the calling processes.
*/
-sys_execve:
- sethi %hi(sparc_execve), %g1
- ba,pt %xcc, execve_merge
- or %g1, %lo(sparc_execve), %g1
+sys64_execve:
+ set sys_execve, %g1
+ jmpl %g1, %g0
+ flushw
#ifdef CONFIG_COMPAT
sunos_execv:
- stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
+ mov %g0, %o2
sys32_execve:
- sethi %hi(sparc32_execve), %g1
- or %g1, %lo(sparc32_execve), %g1
-#endif
-
-execve_merge:
- flushw
+ set compat_sys_execve, %g1
jmpl %g1, %g0
- add %sp, PTREGS_OFF, %o0
+ flushw
+#endif
.align 32
sys_sparc_pipe:
@@ -112,11 +108,16 @@ sys_clone:
ret_from_syscall:
/* Clear current_thread_info()->new_child. */
stb %g0, [%g6 + TI_NEW_CHILD]
- ldx [%g6 + TI_FLAGS], %l0
call schedule_tail
mov %g7, %o0
+ ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
+ brnz,pt %o0, ret_sys_call
+ ldx [%g6 + TI_FLAGS], %l0
+ ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
+ call %l1
+ ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
ba,pt %xcc, ret_sys_call
- ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
+ mov 0, %o0
.globl sparc_exit_group
.type sparc_exit_group,#function
@@ -232,7 +233,6 @@ ret_sys_call:
ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
2:
- stb %g0, [%g6 + TI_SYS_NOERROR]
/* System call success, clear Carry condition code. */
andn %g3, %g2, %g3
3:
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 017b74a63dc..cdbd9b81775 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -107,7 +107,7 @@ sys_call_table:
/*40*/ .word sys_newlstat, sys_dup, sys_sparc_pipe, sys_times, sys_nis_syscall
.word sys_umount, sys_setgid, sys_getgid, sys_signal, sys_geteuid
/*50*/ .word sys_getegid, sys_acct, sys_memory_ordering, sys_nis_syscall, sys_ioctl
- .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys_execve
+ .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys64_execve
/*60*/ .word sys_umask, sys_chroot, sys_newfstat, sys_fstat64, sys_getpagesize
.word sys_msync, sys_vfork, sys_pread64, sys_pwrite64, sys_nis_syscall
/*70*/ .word sys_nis_syscall, sys_mmap, sys_nis_syscall, sys_64_munmap, sys_mprotect
diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index b66a77968f3..e7ecf1507d9 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -2688,8 +2688,8 @@ void __init trap_init(void)
TI_PRE_COUNT != offsetof(struct thread_info,
preempt_count) ||
TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
- TI_SYS_NOERROR != offsetof(struct thread_info,
- syscall_noerror) ||
+ TI_CURRENT_DS != offsetof(struct thread_info,
+ current_ds) ||
TI_RESTART_BLOCK != offsetof(struct thread_info,
restart_block) ||
TI_KUNA_REGS != offsetof(struct thread_info,
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 9e28a118e6a..85be1ca539b 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -624,7 +624,7 @@ static void __init inherit_prom_mappings(void)
void prom_world(int enter)
{
if (!enter)
- set_fs((mm_segment_t) { get_thread_current_ds() });
+ set_fs(get_fs());
__asm__ __volatile__("flushw");
}
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 875d008828b..ea7f61e8bc9 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -21,6 +21,8 @@ config TILE
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CLOCKEVENTS
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h
index 3063e6fc8da..ca61fb4296b 100644
--- a/arch/tile/include/asm/compat.h
+++ b/arch/tile/include/asm/compat.h
@@ -275,18 +275,14 @@ extern int compat_setup_rt_frame(int sig, struct k_sigaction *ka,
struct compat_sigaction;
struct compat_siginfo;
struct compat_sigaltstack;
-long compat_sys_execve(const char __user *path,
- compat_uptr_t __user *argv,
- compat_uptr_t __user *envp, struct pt_regs *);
long compat_sys_rt_sigaction(int sig, struct compat_sigaction __user *act,
struct compat_sigaction __user *oact,
size_t sigsetsize);
long compat_sys_rt_sigqueueinfo(int pid, int sig,
struct compat_siginfo __user *uinfo);
-long compat_sys_rt_sigreturn(struct pt_regs *);
+long compat_sys_rt_sigreturn(void);
long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
- struct compat_sigaltstack __user *uoss_ptr,
- struct pt_regs *);
+ struct compat_sigaltstack __user *uoss_ptr);
long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
@@ -303,12 +299,7 @@ long compat_sys_fallocate(int fd, int mode,
long compat_sys_sched_rr_get_interval(compat_pid_t pid,
struct compat_timespec __user *interval);
-/* These are the intvec_64.S trampolines. */
-long _compat_sys_execve(const char __user *path,
- const compat_uptr_t __user *argv,
- const compat_uptr_t __user *envp);
-long _compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
- struct compat_sigaltstack __user *uoss_ptr);
+/* Assembly trampoline to avoid clobbering r0. */
long _compat_sys_rt_sigreturn(void);
#endif /* _ASM_TILE_COMPAT_H */
diff --git a/arch/tile/include/asm/elf.h b/arch/tile/include/asm/elf.h
index f8ccf08f693..b73e1039c91 100644
--- a/arch/tile/include/asm/elf.h
+++ b/arch/tile/include/asm/elf.h
@@ -148,6 +148,7 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
#define compat_start_thread(regs, ip, usp) do { \
regs->pc = ptr_to_compat_reg((void *)(ip)); \
regs->sp = ptr_to_compat_reg((void *)(usp)); \
+ single_step_execve(); \
} while (0)
/*
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index 8c4dd9ff91e..2b70dfb1442 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -211,6 +211,7 @@ static inline void start_thread(struct pt_regs *regs,
{
regs->pc = pc;
regs->sp = usp;
+ single_step_execve();
}
/* Free all resources held by a thread. */
@@ -219,8 +220,6 @@ static inline void release_thread(struct task_struct *dead_task)
/* Nothing for now */
}
-extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
-
extern int do_work_pending(struct pt_regs *regs, u32 flags);
@@ -239,6 +238,9 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_TOP(task) (task_ksp0(task) - STACK_TOP_DELTA)
#define task_pt_regs(task) \
((struct pt_regs *)(task_ksp0(task) - KSTK_PTREGS_GAP) - 1)
+#define current_pt_regs() \
+ ((struct pt_regs *)((stack_pointer | (THREAD_SIZE - 1)) - \
+ (KSTK_PTREGS_GAP - 1)) - 1)
#define task_sp(task) (task_pt_regs(task)->sp)
#define task_pc(task) (task_pt_regs(task)->pc)
/* Aliases for pc and sp (used in fs/proc/array.c) */
diff --git a/arch/tile/include/asm/switch_to.h b/arch/tile/include/asm/switch_to.h
index 1d48c5fee8b..b8f888cbe6b 100644
--- a/arch/tile/include/asm/switch_to.h
+++ b/arch/tile/include/asm/switch_to.h
@@ -68,7 +68,10 @@ extern unsigned long get_switch_to_pc(void);
/* Support function for forking a new task. */
void ret_from_fork(void);
-/* Called from ret_from_fork() when a new process starts up. */
+/* Support function for forking a new kernel thread. */
+void ret_from_kernel_thread(void *fn, void *arg);
+
+/* Called from ret_from_xxx() when a new process starts up. */
struct task_struct *sim_notify_fork(struct task_struct *prev);
#endif /* !__ASSEMBLY__ */
diff --git a/arch/tile/include/asm/syscalls.h b/arch/tile/include/asm/syscalls.h
index 06f0464cfed..4c8462a62cb 100644
--- a/arch/tile/include/asm/syscalls.h
+++ b/arch/tile/include/asm/syscalls.h
@@ -51,8 +51,7 @@ long sys_cacheflush(unsigned long addr, unsigned long len,
#ifndef __tilegx__
/* mm/fault.c */
-long sys_cmpxchg_badaddr(unsigned long address, struct pt_regs *);
-long _sys_cmpxchg_badaddr(unsigned long address);
+long sys_cmpxchg_badaddr(unsigned long address);
#endif
#ifdef CONFIG_COMPAT
@@ -63,14 +62,16 @@ long sys_truncate64(const char __user *path, loff_t length);
long sys_ftruncate64(unsigned int fd, loff_t length);
#endif
+/* Provide versions of standard syscalls that use current_pt_regs(). */
+long sys_rt_sigreturn(void);
+long sys_sigaltstack(const stack_t __user *, stack_t __user *);
+#define sys_rt_sigreturn sys_rt_sigreturn
+#define sys_sigaltstack sys_sigaltstack
+
/* These are the intvec*.S trampolines. */
-long _sys_sigaltstack(const stack_t __user *, stack_t __user *);
long _sys_rt_sigreturn(void);
long _sys_clone(unsigned long clone_flags, unsigned long newsp,
void __user *parent_tid, void __user *child_tid);
-long _sys_execve(const char __user *filename,
- const char __user *const __user *argv,
- const char __user *const __user *envp);
#include <asm-generic/syscalls.h>
diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h
index 6e032a0a268..b51c6ee3cd6 100644
--- a/arch/tile/include/asm/unistd.h
+++ b/arch/tile/include/asm/unistd.h
@@ -16,4 +16,6 @@
#define __ARCH_WANT_SYS_LLSEEK
#endif
#define __ARCH_WANT_SYS_NEWFSTATAT
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
#include <uapi/asm/unistd.h>
diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
index d67459b9ac2..9cd7cb6041c 100644
--- a/arch/tile/kernel/compat.c
+++ b/arch/tile/kernel/compat.c
@@ -102,9 +102,7 @@ long compat_sys_sched_rr_get_interval(compat_pid_t pid,
#define compat_sys_fadvise64_64 sys32_fadvise64_64
#define compat_sys_readahead sys32_readahead
-/* Call the trampolines to manage pt_regs where necessary. */
-#define compat_sys_execve _compat_sys_execve
-#define compat_sys_sigaltstack _compat_sys_sigaltstack
+/* Call the assembly trampolines where necessary. */
#define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
#define sys_clone _sys_clone
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index 08b4fe1717b..2e4cc69224a 100644
--- a/arch/tile/kernel/compat_signal.c
+++ b/arch/tile/kernel/compat_signal.c
@@ -197,8 +197,7 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
}
long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
- struct compat_sigaltstack __user *uoss_ptr,
- struct pt_regs *regs)
+ struct compat_sigaltstack __user *uoss_ptr)
{
stack_t uss, uoss;
int ret;
@@ -219,7 +218,7 @@ long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
set_fs(KERNEL_DS);
ret = do_sigaltstack(uss_ptr ? (stack_t __user __force *)&uss : NULL,
(stack_t __user __force *)&uoss,
- (unsigned long)compat_ptr(regs->sp));
+ (unsigned long)compat_ptr(current_pt_regs()->sp));
set_fs(seg);
if (ret >= 0 && uoss_ptr) {
if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(*uoss_ptr)) ||
@@ -232,8 +231,9 @@ long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr,
}
/* The assembly shim for this function arranges to ignore the return value. */
-long compat_sys_rt_sigreturn(struct pt_regs *regs)
+long compat_sys_rt_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct compat_rt_sigframe __user *frame =
(struct compat_rt_sigframe __user *) compat_ptr(regs->sp);
sigset_t set;
@@ -248,7 +248,7 @@ long compat_sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
- if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0)
+ if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL) == -EFAULT)
goto badframe;
return 0;
diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S
index c31637baff2..f116cb0bce2 100644
--- a/arch/tile/kernel/entry.S
+++ b/arch/tile/kernel/entry.S
@@ -28,17 +28,6 @@ STD_ENTRY(current_text_addr)
STD_ENDPROC(current_text_addr)
/*
- * Implement execve(). The i386 code has a note that forking from kernel
- * space results in no copy on write until the execve, so we should be
- * careful not to write to the stack here.
- */
-STD_ENTRY(kernel_execve)
- moveli TREG_SYSCALL_NR_NAME, __NR_execve
- swint1
- jrp lr
- STD_ENDPROC(kernel_execve)
-
-/*
* We don't run this function directly, but instead copy it to a page
* we map into every user process. See vdso_setup().
*
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
index 6943515100f..f212bf7cea8 100644
--- a/arch/tile/kernel/intvec_32.S
+++ b/arch/tile/kernel/intvec_32.S
@@ -1291,6 +1291,21 @@ STD_ENTRY(ret_from_fork)
}
STD_ENDPROC(ret_from_fork)
+STD_ENTRY(ret_from_kernel_thread)
+ jal sim_notify_fork
+ jal schedule_tail
+ FEEDBACK_REENTER(ret_from_fork)
+ {
+ move r0, r31
+ jalr r30
+ }
+ FEEDBACK_REENTER(ret_from_kernel_thread)
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
+ STD_ENDPROC(ret_from_kernel_thread)
+
/*
* Code for ill interrupt.
*/
@@ -1437,15 +1452,6 @@ STD_ENTRY_LOCAL(bad_intr)
panic "Unhandled interrupt %#x: PC %#lx"
STD_ENDPROC(bad_intr)
-/* Put address of pt_regs in reg and jump. */
-#define PTREGS_SYSCALL(x, reg) \
- STD_ENTRY(_##x); \
- { \
- PTREGS_PTR(reg, PTREGS_OFFSET_BASE); \
- j x \
- }; \
- STD_ENDPROC(_##x)
-
/*
* Special-case sigreturn to not write r0 to the stack on return.
* This is technically more efficient, but it also avoids difficulties
@@ -1461,12 +1467,9 @@ STD_ENTRY_LOCAL(bad_intr)
}; \
STD_ENDPROC(_##x)
-PTREGS_SYSCALL(sys_execve, r3)
-PTREGS_SYSCALL(sys_sigaltstack, r2)
PTREGS_SYSCALL_SIGRETURN(sys_rt_sigreturn, r0)
-PTREGS_SYSCALL(sys_cmpxchg_badaddr, r1)
-/* Save additional callee-saves to pt_regs, put address in r4 and jump. */
+/* Save additional callee-saves to pt_regs and jump to standard function. */
STD_ENTRY(_sys_clone)
push_extra_callee_saves r4
j sys_clone
diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S
index 7c06d597ffd..54bc9a6678e 100644
--- a/arch/tile/kernel/intvec_64.S
+++ b/arch/tile/kernel/intvec_64.S
@@ -1150,6 +1150,21 @@ STD_ENTRY(ret_from_fork)
}
STD_ENDPROC(ret_from_fork)
+STD_ENTRY(ret_from_kernel_thread)
+ jal sim_notify_fork
+ jal schedule_tail
+ FEEDBACK_REENTER(ret_from_fork)
+ {
+ move r0, r31
+ jalr r30
+ }
+ FEEDBACK_REENTER(ret_from_kernel_thread)
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
+ STD_ENDPROC(ret_from_kernel_thread)
+
/* Various stub interrupt handlers and syscall handlers */
STD_ENTRY_LOCAL(_kernel_double_fault)
@@ -1166,15 +1181,6 @@ STD_ENTRY_LOCAL(bad_intr)
panic "Unhandled interrupt %#x: PC %#lx"
STD_ENDPROC(bad_intr)
-/* Put address of pt_regs in reg and jump. */
-#define PTREGS_SYSCALL(x, reg) \
- STD_ENTRY(_##x); \
- { \
- PTREGS_PTR(reg, PTREGS_OFFSET_BASE); \
- j x \
- }; \
- STD_ENDPROC(_##x)
-
/*
* Special-case sigreturn to not write r0 to the stack on return.
* This is technically more efficient, but it also avoids difficulties
@@ -1190,16 +1196,12 @@ STD_ENTRY_LOCAL(bad_intr)
}; \
STD_ENDPROC(_##x)
-PTREGS_SYSCALL(sys_execve, r3)
-PTREGS_SYSCALL(sys_sigaltstack, r2)
PTREGS_SYSCALL_SIGRETURN(sys_rt_sigreturn, r0)
#ifdef CONFIG_COMPAT
-PTREGS_SYSCALL(compat_sys_execve, r3)
-PTREGS_SYSCALL(compat_sys_sigaltstack, r2)
PTREGS_SYSCALL_SIGRETURN(compat_sys_rt_sigreturn, r0)
#endif
-/* Save additional callee-saves to pt_regs, put address in r4 and jump. */
+/* Save additional callee-saves to pt_regs and jump to standard function. */
STD_ENTRY(_sys_clone)
push_extra_callee_saves r4
j sys_clone
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 307d010696c..0e5661e7d00 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -157,24 +157,43 @@ void arch_release_thread_info(struct thread_info *info)
static void save_arch_state(struct thread_struct *t);
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long stack_size,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
- struct pt_regs *childregs;
+ struct pt_regs *childregs = task_pt_regs(p), *regs = current_pt_regs();
unsigned long ksp;
+ unsigned long *callee_regs;
/*
- * When creating a new kernel thread we pass sp as zero.
- * Assign it to a reasonable value now that we have the stack.
+ * Set up the stack and stack pointer appropriately for the
+ * new child to find itself woken up in __switch_to().
+ * The callee-saved registers must be on the stack to be read;
+ * the new task will then jump to assembly support to handle
+ * calling schedule_tail(), etc., and (for userspace tasks)
+ * returning to the context set up in the pt_regs.
*/
- if (sp == 0 && regs->ex1 == PL_ICS_EX1(KERNEL_PL, 0))
- sp = KSTK_TOP(p);
+ ksp = (unsigned long) childregs;
+ ksp -= C_ABI_SAVE_AREA_SIZE; /* interrupt-entry save area */
+ ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
+ ksp -= CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long);
+ callee_regs = (unsigned long *)ksp;
+ ksp -= C_ABI_SAVE_AREA_SIZE; /* __switch_to() save area */
+ ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
+ p->thread.ksp = ksp;
- /*
- * Do not clone step state from the parent; each thread
- * must make its own lazily.
- */
- task_thread_info(p)->step_state = NULL;
+ /* Record the pid of the task that created this one. */
+ p->thread.creator_pid = current->pid;
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ /* kernel thread */
+ memset(childregs, 0, sizeof(struct pt_regs));
+ memset(&callee_regs[2], 0,
+ (CALLEE_SAVED_REGS_COUNT - 2) * sizeof(unsigned long));
+ callee_regs[0] = sp; /* r30 = function */
+ callee_regs[1] = arg; /* r31 = arg */
+ childregs->ex1 = PL_ICS_EX1(KERNEL_PL, 0);
+ p->thread.pc = (unsigned long) ret_from_kernel_thread;
+ return 0;
+ }
/*
* Start new thread in ret_from_fork so it schedules properly
@@ -182,46 +201,33 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
*/
p->thread.pc = (unsigned long) ret_from_fork;
- /* Save user stack top pointer so we can ID the stack vm area later. */
- p->thread.usp0 = sp;
-
- /* Record the pid of the process that created this one. */
- p->thread.creator_pid = current->pid;
+ /*
+ * Do not clone step state from the parent; each thread
+ * must make its own lazily.
+ */
+ task_thread_info(p)->step_state = NULL;
/*
* Copy the registers onto the kernel stack so the
* return-from-interrupt code will reload it into registers.
*/
- childregs = task_pt_regs(p);
- *childregs = *regs;
+ *childregs = *current_pt_regs();
childregs->regs[0] = 0; /* return value is zero */
- childregs->sp = sp; /* override with new user stack pointer */
+ if (sp)
+ childregs->sp = sp; /* override with new user stack pointer */
+ memcpy(callee_regs, &childregs->regs[CALLEE_SAVED_FIRST_REG],
+ CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long));
+
+ /* Save user stack top pointer so we can ID the stack vm area later. */
+ p->thread.usp0 = childregs->sp;
/*
* If CLONE_SETTLS is set, set "tp" in the new task to "r4",
* which is passed in as arg #5 to sys_clone().
*/
if (clone_flags & CLONE_SETTLS)
- childregs->tp = regs->regs[4];
+ childregs->tp = childregs->regs[4];
- /*
- * Copy the callee-saved registers from the passed pt_regs struct
- * into the context-switch callee-saved registers area.
- * This way when we start the interrupt-return sequence, the
- * callee-save registers will be correctly in registers, which
- * is how we assume the compiler leaves them as we start doing
- * the normal return-from-interrupt path after calling C code.
- * Zero out the C ABI save area to mark the top of the stack.
- */
- ksp = (unsigned long) childregs;
- ksp -= C_ABI_SAVE_AREA_SIZE; /* interrupt-entry save area */
- ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
- ksp -= CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long);
- memcpy((void *)ksp, &regs->regs[CALLEE_SAVED_FIRST_REG],
- CALLEE_SAVED_REGS_COUNT * sizeof(unsigned long));
- ksp -= C_ABI_SAVE_AREA_SIZE; /* __switch_to() save area */
- ((long *)ksp)[0] = ((long *)ksp)[1] = 0;
- p->thread.ksp = ksp;
#if CHIP_HAS_TILE_DMA()
/*
@@ -577,62 +583,6 @@ int do_work_pending(struct pt_regs *regs, u32 thread_info_flags)
panic("work_pending: bad flags %#x\n", thread_info_flags);
}
-/* Note there is an implicit fifth argument if (clone_flags & CLONE_SETTLS). */
-SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp,
- void __user *, parent_tidptr, void __user *, child_tidptr,
- struct pt_regs *, regs)
-{
- if (!newsp)
- newsp = regs->sp;
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tidptr, child_tidptr);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-SYSCALL_DEFINE4(execve, const char __user *, path,
- const char __user *const __user *, argv,
- const char __user *const __user *, envp,
- struct pt_regs *, regs)
-{
- long error;
- struct filename *filename;
-
- filename = getname(path);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
- if (error == 0)
- single_step_execve();
-out:
- return error;
-}
-
-#ifdef CONFIG_COMPAT
-long compat_sys_execve(const char __user *path,
- compat_uptr_t __user *argv,
- compat_uptr_t __user *envp,
- struct pt_regs *regs)
-{
- long error;
- struct filename *filename;
-
- filename = getname(path);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = compat_do_execve(filename->name, argv, envp, regs);
- putname(filename);
- if (error == 0)
- single_step_execve();
-out:
- return error;
-}
-#endif
-
unsigned long get_wchan(struct task_struct *p)
{
struct KBacktraceIterator kbt;
@@ -650,37 +600,6 @@ unsigned long get_wchan(struct task_struct *p)
return 0;
}
-/*
- * We pass in lr as zero (cleared in kernel_thread) and the caller
- * part of the backtrace ABI on the stack also zeroed (in copy_thread)
- * so that backtraces will stop with this function.
- * Note that we don't use r0, since copy_thread() clears it.
- */
-static void start_kernel_thread(int dummy, int (*fn)(int), int arg)
-{
- do_exit(fn(arg));
-}
-
-/*
- * Create a kernel thread
- */
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
- regs.ex1 = PL_ICS_EX1(KERNEL_PL, 0); /* run at kernel PL, no ICS */
- regs.pc = (long) start_kernel_thread;
- regs.flags = PT_FLAGS_CALLER_SAVES; /* need to restore r1 and r2 */
- regs.regs[1] = (long) fn; /* function pointer */
- regs.regs[2] = (long) arg; /* parameter register */
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs,
- 0, NULL, NULL);
-}
-EXPORT_SYMBOL(kernel_thread);
-
/* Flush thread state. */
void flush_thread(void)
{
diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
index 67efb656d10..657a7ace4ab 100644
--- a/arch/tile/kernel/signal.c
+++ b/arch/tile/kernel/signal.c
@@ -37,10 +37,10 @@
#define DEBUG_SIG 0
-SYSCALL_DEFINE3(sigaltstack, const stack_t __user *, uss,
- stack_t __user *, uoss, struct pt_regs *, regs)
+SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss,
+ stack_t __user *, uoss)
{
- return do_sigaltstack(uss, uoss, regs->sp);
+ return do_sigaltstack(uss, uoss, current_pt_regs()->sp);
}
@@ -83,8 +83,9 @@ void signal_fault(const char *type, struct pt_regs *regs,
}
/* The assembly shim for this function arranges to ignore the return value. */
-SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs)
+SYSCALL_DEFINE0(rt_sigreturn)
{
+ struct pt_regs *regs = current_pt_regs();
struct rt_sigframe __user *frame =
(struct rt_sigframe __user *)(regs->sp);
sigset_t set;
diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c
index b08095b402d..b881a7be24b 100644
--- a/arch/tile/kernel/sys.c
+++ b/arch/tile/kernel/sys.c
@@ -106,14 +106,10 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
#define sys_readahead sys32_readahead
#endif
-/* Call the trampolines to manage pt_regs where necessary. */
-#define sys_execve _sys_execve
-#define sys_sigaltstack _sys_sigaltstack
+/* Call the assembly trampolines where necessary. */
+#undef sys_rt_sigreturn
#define sys_rt_sigreturn _sys_rt_sigreturn
#define sys_clone _sys_clone
-#ifndef __tilegx__
-#define sys_cmpxchg_badaddr _sys_cmpxchg_badaddr
-#endif
/*
* Note that we can't include <linux/unistd.h> here since the header
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index fe811fa5f1b..3d2b81c163a 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -70,9 +70,10 @@ static noinline void force_sig_info_fault(const char *type, int si_signo,
* Synthesize the fault a PL0 process would get by doing a word-load of
* an unaligned address or a high kernel address.
*/
-SYSCALL_DEFINE2(cmpxchg_badaddr, unsigned long, address,
- struct pt_regs *, regs)
+SYSCALL_DEFINE1(cmpxchg_badaddr, unsigned long, address)
{
+ struct pt_regs *regs = current_pt_regs();
+
if (address >= PAGE_OFFSET)
force_sig_info_fault("atomic segfault", SIGSEGV, SEGV_MAPERR,
address, INT_DTLB_MISS, current, regs);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index b6d699cdd55..b462b13c5ba 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -161,8 +161,7 @@ void fork_handler(void)
}
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long arg, struct task_struct * p,
- struct pt_regs *regs)
+ unsigned long arg, struct task_struct * p)
{
void (*handler)(void);
int kthread = current->flags & PF_KTHREAD;
@@ -171,7 +170,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
p->thread = (struct thread_struct) INIT_THREAD;
if (!kthread) {
- memcpy(&p->thread.regs.regs, &regs->regs,
+ memcpy(&p->thread.regs.regs, current_pt_regs(),
sizeof(p->thread.regs.regs));
PT_REGS_SET_SYSCALL_RETURN(&p->thread.regs, 0);
if (sp != 0)
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index a81f3705e90..c1d0ae069b5 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -14,29 +14,6 @@
#include <asm/uaccess.h>
#include <asm/unistd.h>
-long sys_fork(void)
-{
- return do_fork(SIGCHLD, UPT_SP(&current->thread.regs.regs),
- &current->thread.regs, 0, NULL, NULL);
-}
-
-long sys_vfork(void)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
- UPT_SP(&current->thread.regs.regs),
- &current->thread.regs, 0, NULL, NULL);
-}
-
-long sys_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void __user *child_tid)
-{
- if (!newsp)
- newsp = UPT_SP(&current->thread.regs.regs);
-
- return do_fork(clone_flags, newsp, &current->thread.regs, 0, parent_tid,
- child_tid);
-}
-
long old_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long offset)
diff --git a/arch/unicore32/include/uapi/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h
index d18a3be89b3..00cf5e286fc 100644
--- a/arch/unicore32/include/uapi/asm/unistd.h
+++ b/arch/unicore32/include/uapi/asm/unistd.h
@@ -13,3 +13,4 @@
/* Use the standard ABI for syscalls. */
#include <asm-generic/unistd.h>
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/unicore32/kernel/entry.S b/arch/unicore32/kernel/entry.S
index 7049350c790..581630d9144 100644
--- a/arch/unicore32/kernel/entry.S
+++ b/arch/unicore32/kernel/entry.S
@@ -668,12 +668,6 @@ __cr_alignment:
#endif
.ltorg
-ENTRY(sys_clone)
- add ip, sp, #S_OFF
- stw ip, [sp+], #4
- b __sys_clone
-ENDPROC(sys_clone)
-
ENTRY(sys_rt_sigreturn)
add r0, sp, #S_OFF
mov why, #0 @ prevent syscall restart handling
diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c
index a8fe265ce2c..62bad9fed03 100644
--- a/arch/unicore32/kernel/process.c
+++ b/arch/unicore32/kernel/process.c
@@ -262,26 +262,27 @@ asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
int
copy_thread(unsigned long clone_flags, unsigned long stack_start,
- unsigned long stk_sz, struct task_struct *p, struct pt_regs *regs)
+ unsigned long stk_sz, struct task_struct *p)
{
struct thread_info *thread = task_thread_info(p);
struct pt_regs *childregs = task_pt_regs(p);
memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
thread->cpu_context.sp = (unsigned long)childregs;
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread;
thread->cpu_context.r4 = stack_start;
thread->cpu_context.r5 = stk_sz;
memset(childregs, 0, sizeof(struct pt_regs));
} else {
thread->cpu_context.pc = (unsigned long)ret_from_fork;
- *childregs = *regs;
+ *childregs = *current_pt_regs();
childregs->UCreg_00 = 0;
- childregs->UCreg_sp = stack_start;
+ if (stack_start)
+ childregs->UCreg_sp = stack_start;
if (clone_flags & CLONE_SETTLS)
- childregs->UCreg_16 = regs->UCreg_03;
+ childregs->UCreg_16 = childregs->UCreg_03;
}
return 0;
}
diff --git a/arch/unicore32/kernel/sys.c b/arch/unicore32/kernel/sys.c
index 9680134b31f..cfe79c9529b 100644
--- a/arch/unicore32/kernel/sys.c
+++ b/arch/unicore32/kernel/sys.c
@@ -28,20 +28,6 @@
#include <asm/syscalls.h>
#include <asm/cacheflush.h>
-/* Clone a task - this clones the calling program thread.
- * This is called indirectly via a small wrapper
- */
-asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void __user *child_tid,
- struct pt_regs *regs)
-{
- if (!newsp)
- newsp = regs->UCreg_sp;
-
- return do_fork(clone_flags, newsp, regs, 0,
- parent_tid, child_tid);
-}
-
/* Note: used by the compat code even in 64-bit Linux. */
SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 037c4e30c27..9195fd80e11 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -112,6 +112,7 @@ config X86
select GENERIC_KERNEL_EXECVE
select MODULES_USE_ELF_REL if X86_32
select MODULES_USE_ELF_RELA if X86_64
+ select CLONE_BACKWARDS if X86_32
config INSTRUCTION_DECODER
def_bool y
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index 07b3a68d2d2..a703af19c28 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -35,7 +35,7 @@
#undef WARN_OLD
#undef CORE_DUMP /* definitely broken */
-static int load_aout_binary(struct linux_binprm *, struct pt_regs *regs);
+static int load_aout_binary(struct linux_binprm *);
static int load_aout_library(struct file *);
#ifdef CORE_DUMP
@@ -260,9 +260,10 @@ static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm)
* These are the functions used to load a.out style executables and shared
* libraries. There is no binary dependent code anywhere else.
*/
-static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
+static int load_aout_binary(struct linux_binprm *bprm)
{
unsigned long error, fd_offset, rlim;
+ struct pt_regs *regs = current_pt_regs();
struct exec ex;
int retval;
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 076745fc804..32e6f05ddaa 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -467,11 +467,16 @@ GLOBAL(\label)
PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
PTREGSCALL stub32_execve, compat_sys_execve, %rcx
PTREGSCALL stub32_fork, sys_fork, %rdi
- PTREGSCALL stub32_clone, sys32_clone, %rdx
PTREGSCALL stub32_vfork, sys_vfork, %rdi
PTREGSCALL stub32_iopl, sys_iopl, %rsi
ALIGN
+GLOBAL(stub32_clone)
+ leaq sys_clone(%rip),%rax
+ mov %r8, %rcx
+ jmp ia32_ptregs_common
+
+ ALIGN
ia32_ptregs_common:
popq %r11
CFI_ENDPROC
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index 86d68d1c880..d0b689ba7be 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -385,17 +385,6 @@ asmlinkage long sys32_sendfile(int out_fd, int in_fd,
return ret;
}
-asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
- struct pt_regs *regs)
-{
- void __user *parent_tid = (void __user *)regs->dx;
- void __user *child_tid = (void __user *)regs->di;
-
- if (!newsp)
- newsp = regs->sp;
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-}
-
/*
* Some system calls that need sign extended arguments. This could be
* done by a generic wrapper.
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index e101b38912d..888184b2fc8 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -178,8 +178,6 @@ static inline int hlt_works(int cpu)
extern void cpu_detect(struct cpuinfo_x86 *c);
-extern struct pt_regs *idle_regs(struct pt_regs *);
-
extern void early_cpu_init(void);
extern void identify_boot_cpu(void);
extern void identify_secondary_cpu(struct cpuinfo_x86 *);
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index 323973f4abf..0dba8b7a6ac 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -260,8 +260,6 @@ struct pt_regs;
#endif /* !__i386__ */
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
-
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index a9a8cf3da49..c76fae4d90b 100644
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -54,8 +54,6 @@ asmlinkage long sys32_pwrite(unsigned int, const char __user *, u32, u32, u32);
asmlinkage long sys32_personality(unsigned long);
asmlinkage long sys32_sendfile(int, int, compat_off_t __user *, s32);
-asmlinkage long sys32_clone(unsigned int, unsigned int, struct pt_regs *);
-
long sys32_lseek(unsigned int, int, unsigned int);
long sys32_kill(int, int);
long sys32_fadvise64_64(int, __u32, __u32, __u32, __u32, int);
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 2be0b880417..2f8374718aa 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -20,15 +20,6 @@
asmlinkage long sys_ioperm(unsigned long, unsigned long, int);
long sys_iopl(unsigned int, struct pt_regs *);
-/* kernel/process.c */
-int sys_fork(struct pt_regs *);
-int sys_vfork(struct pt_regs *);
-long sys_execve(const char __user *,
- const char __user *const __user *,
- const char __user *const __user *);
-long sys_clone(unsigned long, unsigned long, void __user *,
- void __user *, struct pt_regs *);
-
/* kernel/ldt.c */
asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h
index 16f3fc6ebf2..0e7dea7d366 100644
--- a/arch/x86/include/asm/unistd.h
+++ b/arch/x86/include/asm/unistd.h
@@ -51,6 +51,9 @@
# define __ARCH_WANT_SYS_UTIME
# define __ARCH_WANT_SYS_WAITPID
# define __ARCH_WANT_SYS_EXECVE
+# define __ARCH_WANT_SYS_FORK
+# define __ARCH_WANT_SYS_VFORK
+# define __ARCH_WANT_SYS_CLONE
/*
* "Conditional" syscalls
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index ca165ac6793..9c3ab43a695 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1173,15 +1173,6 @@ DEFINE_PER_CPU(struct task_struct *, fpu_owner_task);
DEFINE_PER_CPU_ALIGNED(struct stack_canary, stack_canary);
#endif
-/* Make sure %fs and %gs are initialized properly in idle threads */
-struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
-{
- memset(regs, 0, sizeof(struct pt_regs));
- regs->fs = __KERNEL_PERCPU;
- regs->gs = __KERNEL_STACK_CANARY;
-
- return regs;
-}
#endif /* CONFIG_X86_64 */
/*
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 88b725aa1d5..c763116c535 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -739,30 +739,12 @@ ENTRY(ptregs_##name) ; \
ENDPROC(ptregs_##name)
PTREGSCALL1(iopl)
-PTREGSCALL0(fork)
-PTREGSCALL0(vfork)
PTREGSCALL2(sigaltstack)
PTREGSCALL0(sigreturn)
PTREGSCALL0(rt_sigreturn)
PTREGSCALL2(vm86)
PTREGSCALL1(vm86old)
-/* Clone is an oddball. The 4th arg is in %edi */
-ENTRY(ptregs_clone)
- CFI_STARTPROC
- leal 4(%esp),%eax
- pushl_cfi %eax
- pushl_cfi PT_EDI(%eax)
- movl PT_EDX(%eax),%ecx
- movl PT_ECX(%eax),%edx
- movl PT_EBX(%eax),%eax
- call sys_clone
- addl $8,%esp
- CFI_ADJUST_CFA_OFFSET -8
- ret
- CFI_ENDPROC
-ENDPROC(ptregs_clone)
-
.macro FIXUP_ESPFIX_STACK
/*
* Switch back for ESPFIX stack to the normal zerobased stack
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 31b46128a63..70641aff0c2 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -845,9 +845,25 @@ ENTRY(\label)
END(\label)
.endm
- PTREGSCALL stub_clone, sys_clone, %r8
- PTREGSCALL stub_fork, sys_fork, %rdi
- PTREGSCALL stub_vfork, sys_vfork, %rdi
+ .macro FORK_LIKE func
+ENTRY(stub_\func)
+ CFI_STARTPROC
+ popq %r11 /* save return address */
+ PARTIAL_FRAME 0
+ SAVE_REST
+ pushq %r11 /* put it back on stack */
+ FIXUP_TOP_OF_STACK %r11, 8
+ DEFAULT_FRAME 0 8 /* offset 8: return address */
+ call sys_\func
+ RESTORE_TOP_OF_STACK %r11, 8
+ ret $REST_SKIP /* pop extended registers */
+ CFI_ENDPROC
+END(stub_\func)
+ .endm
+
+ FORK_LIKE clone
+ FORK_LIKE fork
+ FORK_LIKE vfork
PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
PTREGSCALL stub_iopl, sys_iopl, %rsi
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 2f99e312187..2ed787f15bf 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -262,36 +262,6 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
propagate_user_return_notify(prev_p, next_p);
}
-int sys_fork(struct pt_regs *regs)
-{
- return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
-}
-
-/*
- * This is trivial, and on the face of it looks like it
- * could equally well be done in user mode.
- *
- * Not so, for quite unobvious reasons - register pressure.
- * In user mode vfork() cannot have a stack frame, and if
- * done by calling the "clone()" system call directly, you
- * do not have enough call-clobbered registers to hold all
- * the information you need.
- */
-int sys_vfork(struct pt_regs *regs)
-{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0,
- NULL, NULL);
-}
-
-long
-sys_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
-{
- if (!newsp)
- newsp = regs->sp;
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-}
-
/*
* Idle related variables and functions
*/
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 44e0bff38e7..b5a8905785e 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -128,8 +128,7 @@ void release_thread(struct task_struct *dead_task)
}
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long arg,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
struct pt_regs *childregs = task_pt_regs(p);
struct task_struct *tsk;
@@ -138,7 +137,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
p->thread.sp = (unsigned long) childregs;
p->thread.sp0 = (unsigned long) (childregs+1);
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
memset(childregs, 0, sizeof(struct pt_regs));
p->thread.ip = (unsigned long) ret_from_kernel_thread;
@@ -156,12 +155,13 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
return 0;
}
- *childregs = *regs;
+ *childregs = *current_pt_regs();
childregs->ax = 0;
- childregs->sp = sp;
+ if (sp)
+ childregs->sp = sp;
p->thread.ip = (unsigned long) ret_from_fork;
- task_user_gs(p) = get_user_gs(regs);
+ task_user_gs(p) = get_user_gs(current_pt_regs());
p->fpu_counter = 0;
p->thread.io_bitmap_ptr = NULL;
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 16c6365e2b8..6e68a619496 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -146,8 +146,7 @@ static inline u32 read_32bit_tls(struct task_struct *t, int tls)
}
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long arg,
- struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p)
{
int err;
struct pt_regs *childregs;
@@ -169,7 +168,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
savesegment(ds, p->thread.ds);
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
- if (unlikely(!regs)) {
+ if (unlikely(p->flags & PF_KTHREAD)) {
/* kernel thread */
memset(childregs, 0, sizeof(struct pt_regs));
childregs->sp = (unsigned long)childregs;
@@ -181,10 +180,11 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
return 0;
}
- *childregs = *regs;
+ *childregs = *current_pt_regs();
childregs->ax = 0;
- childregs->sp = sp;
+ if (sp)
+ childregs->sp = sp;
err = -ENOMEM;
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index a47103fbc69..ee3c220ee50 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -8,7 +8,7 @@
#
0 i386 restart_syscall sys_restart_syscall
1 i386 exit sys_exit
-2 i386 fork ptregs_fork stub32_fork
+2 i386 fork sys_fork stub32_fork
3 i386 read sys_read
4 i386 write sys_write
5 i386 open sys_open compat_sys_open
@@ -126,7 +126,7 @@
117 i386 ipc sys_ipc sys32_ipc
118 i386 fsync sys_fsync
119 i386 sigreturn ptregs_sigreturn stub32_sigreturn
-120 i386 clone ptregs_clone stub32_clone
+120 i386 clone sys_clone stub32_clone
121 i386 setdomainname sys_setdomainname
122 i386 uname sys_newuname
123 i386 modify_ldt sys_modify_ldt
@@ -196,7 +196,7 @@
187 i386 sendfile sys_sendfile sys32_sendfile
188 i386 getpmsg
189 i386 putpmsg
-190 i386 vfork ptregs_vfork stub32_vfork
+190 i386 vfork sys_vfork stub32_vfork
191 i386 ugetrlimit sys_getrlimit compat_sys_getrlimit
192 i386 mmap2 sys_mmap_pgoff
193 i386 truncate64 sys_truncate64 sys32_truncate64
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index b0c30dae9f5..98399704196 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -25,6 +25,7 @@ config X86_32
select HAVE_AOUT
select ARCH_WANT_IPC_PARSE_VERSION
select MODULES_USE_ELF_REL
+ select CLONE_BACKWARDS
config X86_64
def_bool 64BIT
diff --git a/arch/x86/um/shared/sysdep/syscalls.h b/arch/x86/um/shared/sysdep/syscalls.h
index ca255a805ed..bd9a89b67e4 100644
--- a/arch/x86/um/shared/sysdep/syscalls.h
+++ b/arch/x86/um/shared/sysdep/syscalls.h
@@ -1,5 +1,3 @@
-extern long sys_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void __user *child_tid);
#ifdef __i386__
#include "syscalls_32.h"
#else
diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c
index 232e60504b3..812e98c098e 100644
--- a/arch/x86/um/sys_call_table_32.c
+++ b/arch/x86/um/sys_call_table_32.c
@@ -24,13 +24,10 @@
#define old_mmap sys_old_mmap
-#define ptregs_fork sys_fork
#define ptregs_iopl sys_iopl
#define ptregs_vm86old sys_vm86old
-#define ptregs_clone i386_clone
#define ptregs_vm86 sys_vm86
#define ptregs_sigaltstack sys_sigaltstack
-#define ptregs_vfork sys_vfork
#define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ;
#include <asm/syscalls_32.h>
diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c
index db444c7218f..e8bcea99acd 100644
--- a/arch/x86/um/syscalls_32.c
+++ b/arch/x86/um/syscalls_32.c
@@ -6,21 +6,6 @@
#include <linux/syscalls.h>
#include <sysdep/syscalls.h>
-/*
- * The prototype on i386 is:
- *
- * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls
- *
- * and the "newtls" arg. on i386 is read by copy_thread directly from the
- * register saved on the stack.
- */
-long i386_clone(unsigned long clone_flags, unsigned long newsp,
- int __user *parent_tid, void *newtls, int __user *child_tid)
-{
- return sys_clone(clone_flags, newsp, parent_tid, child_tid);
-}
-
-
long sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 0d1f36a22c9..2481f267be2 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -16,6 +16,7 @@ config XTENSA
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
select ARCH_WANT_OPTIONAL_GPIOLIB
+ select CLONE_BACKWARDS
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
primarily for embedded systems. These processors are both
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
index 72fd44c85b7..6f586bd90e1 100644
--- a/arch/xtensa/include/asm/signal.h
+++ b/arch/xtensa/include/asm/signal.h
@@ -27,7 +27,6 @@ struct k_sigaction {
};
#include <asm/sigcontext.h>
-#define ptrace_signal_deliver(regs, cookie) do { } while (0)
#endif /* __ASSEMBLY__ */
#endif /* _XTENSA_SIGNAL_H */
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index 124aeee0d38..b00c928d4cc 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -10,8 +10,6 @@
struct pt_regs;
struct sigaction;
-asmlinkage long sys_execve(char*, char**, char**, struct pt_regs*);
-asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
asmlinkage long xtensa_ptrace(long, long, long, long);
asmlinkage long xtensa_sigreturn(struct pt_regs*);
asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index f4e6eaa40d1..e002dbcc88b 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -2,6 +2,7 @@
#define _XTENSA_UNISTD_H
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
#include <uapi/asm/unistd.h>
/*
diff --git a/arch/xtensa/include/uapi/asm/unistd.h b/arch/xtensa/include/uapi/asm/unistd.h
index 9f36d0e3e0a..5162418c5d9 100644
--- a/arch/xtensa/include/uapi/asm/unistd.h
+++ b/arch/xtensa/include/uapi/asm/unistd.h
@@ -260,7 +260,7 @@ __SYSCALL(115, sys_sendmmsg, 4)
/* Process Operations */
#define __NR_clone 116
-__SYSCALL(116, xtensa_clone, 5)
+__SYSCALL(116, sys_clone, 5)
#define __NR_execve 117
__SYSCALL(117, sys_execve, 3)
#define __NR_exit 118
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 09ae7bfab9a..1accf28da5f 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -199,8 +199,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
*/
int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
- unsigned long thread_fn_arg,
- struct task_struct *p, struct pt_regs *unused)
+ unsigned long thread_fn_arg, struct task_struct *p)
{
struct pt_regs *childregs = task_pt_regs(p);
@@ -364,12 +363,3 @@ int dump_fpu(void)
{
return 0;
}
-
-asmlinkage
-long xtensa_clone(unsigned long clone_flags, unsigned long newsp,
- void __user *parent_tid, void *child_tls,
- void __user *child_tid, long a5,
- struct pt_regs *regs)
-{
- return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
-}