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kgdb: x86: Return all segment registers also in 64-bit mode 

Even if the content is always 0, gdb expects us to return also ds,
es, fs, and gs while in x86-64 mode. Do this to avoid ugly errors on
"info registers".

[jason.wessel@windriver.com: adjust NUMREGBYTES for two new regs]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jan Kiszka 2012-03-19 15:16:48 -05:00 committed by Jason Wessel
parent c16fa4f2ad
commit 639077fb69
2 changed files with 11 additions and 5 deletions
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10
arch/x86/include/asm/kgdb.h
View File

@ -64,11 +64,15 @@ enum regnames {
GDB_PS, /* 17 */
GDB_CS, /* 18 */
GDB_SS, /* 19 */
GDB_DS, /* 20 */
GDB_ES, /* 21 */
GDB_FS, /* 22 */
GDB_GS, /* 23 */
};
#define GDB_ORIG_AX 57
#define DBG_MAX_REG_NUM 20
/* 17 64 bit regs and 3 32 bit regs */
#define NUMREGBYTES ((17 * 8) + (3 * 4))
#define DBG_MAX_REG_NUM 24
/* 17 64 bit regs and 5 32 bit regs */
#define NUMREGBYTES ((17 * 8) + (5 * 4))
#endif /* ! CONFIG_X86_32 */
static inline void arch_kgdb_breakpoint(void)

6
arch/x86/kernel/kgdb.c
View File

@ -67,8 +67,6 @@ struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
{ "ss", 4, offsetof(struct pt_regs, ss) },
{ "ds", 4, offsetof(struct pt_regs, ds) },
{ "es", 4, offsetof(struct pt_regs, es) },
{ "fs", 4, -1 },
{ "gs", 4, -1 },
#else
{ "ax", 8, offsetof(struct pt_regs, ax) },
{ "bx", 8, offsetof(struct pt_regs, bx) },
@ -90,7 +88,11 @@ struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
{ "flags", 4, offsetof(struct pt_regs, flags) },
{ "cs", 4, offsetof(struct pt_regs, cs) },
{ "ss", 4, offsetof(struct pt_regs, ss) },
{ "ds", 4, -1 },
{ "es", 4, -1 },
#endif
{ "fs", 4, -1 },
{ "gs", 4, -1 },
};
int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)