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authorStefani Seibold <stefani@seibold.net>2009-11-03 10:22:40 +0100
committerIngo Molnar <mingo@elte.hu>2009-11-04 13:25:03 +0100
commit89240ba059ca468ae7a8346edf7f95082458c2fc (patch)
treea16b4ce794572d256f568e41fe9ccfc10c35ff39 /fs
parent1d87cff407ceddf0bc4e825949a4b1bf645418bd (diff)
x86, fs: Fix x86 procfs stack information for threads on 64-bit
This patch fixes two issues in the procfs stack information on x86-64 linux. The 32 bit loader compat_do_execve did not store stack start. (this was figured out by Alexey Dobriyan). The stack information on a x64_64 kernel always shows 0 kbyte stack usage, because of a missing implementation of the KSTK_ESP macro which always returned -1. The new implementation now returns the right value. Signed-off-by: Stefani Seibold <stefani@seibold.net> Cc: Americo Wang <xiyou.wangcong@gmail.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1257240160.4889.24.camel@wall-e> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs')
-rw-r--r--fs/compat.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/compat.c b/fs/compat.c
index d576b552e8e..6c19040ffee 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1532,6 +1532,8 @@ int compat_do_execve(char * filename,
if (retval < 0)
goto out;
+ current->stack_start = current->mm->start_stack;
+
/* execve succeeded */
current->fs->in_exec = 0;
current->in_execve = 0;