x86-64: make compat_start_thread() match start_thread()

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For no real good reason, compat_start_thread() was embedded inline in
<asm/elf.h> whereas the native start_thread() lives in process_*.c.
Move compat_start_thread() to process_64.c, remove gratuitious
differences, and fix a few items which mostly look like bit rot.

In particular, compat_start_thread() didn't do free_thread_xstate(),
which means it was hanging on to the xstate store area even when it
was not needed.  It was also not setting old_rsp, but it looks like
that generally shouldn't matter for a 32-bit process.

Note: compat_start_thread *has* to be a macro, since it is tested with
start_thread_ia32() as the out of line function name.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>

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This commit is contained in:

H. Peter Anvin 2009-10-08 18:02:54 -07:00

parent 36a07902c2

commit a6f05a6a0a

2 changed files with 24 additions and 19 deletions

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20

arch/x86/include/asm/elf.h

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23

arch/x86/kernel/process_64.c

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