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x86, fs: Fix x86 procfs stack information for threads on 64-bit

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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 <[email protected]>
Cc: Americo Wang <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Andrew Morton <[email protected]>
LKML-Reference: <1257240160.4889.24.camel@wall-e>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Stefani Seibold 2009-11-03 10:22:40 +01:00 • committed by Ingo Molnar
commit 89240ba059
3 changed files with 8 additions and 1 deletions
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2
fs/compat.c
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@ -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;