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restorer: introduced the macro SIGFRAME_OFFSET

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The macro is designated to tune the beginning of a sigframe on different architectures.

Signed-off-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Alexander Kartashov 2013-01-14 11:25:49 +04:00 • committed by Pavel Emelyanov
parent 446f89ddc5
commit fa1590bb17
2 changed files with 4 additions and 2 deletions
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2
arch/x86/include/asm/restorer.h
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@ -131,6 +131,8 @@ struct rt_sigframe {
#define RT_SIGFRAME_UC(rt_sigframe) rt_sigframe->uc
#define SIGFRAME_OFFSET 8
int restore_gpregs(struct rt_sigframe *f, UserX86RegsEntry *r);

4
pie/restorer.c
View file

@ -210,7 +210,7 @@ long __export_restore_thread(struct thread_restore_args *args)
futex_dec_and_wake(&thread_inprogress);
new_sp = (long)rt_sigframe + 8;
new_sp = (long)rt_sigframe + SIGFRAME_OFFSET;
ARCH_RT_SIGRETURN(new_sp);
core_restore_end:
@ -715,7 +715,7 @@ long __export_restore_task(struct task_restore_core_args *args)
/*
* Sigframe stack.
*/
new_sp = (long)rt_sigframe + 8;
new_sp = (long)rt_sigframe + SIGFRAME_OFFSET;
/*
* Prepare the stack and call for sigreturn,