diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2009-01-29 15:36:26 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-01-29 15:36:26 +0000 |
| commit | 647925b260ed00034b0ca8c7598c92f6d28a3e99 (patch) | |
| tree | ceb837592a955c2f101fa56bcf9fbf417ab969f5 /sysdeps | |
| parent | fd537e535fe9f4d2b0286cf7a7242ef1e6775e67 (diff) | |
* sysdeps/i386/stackinfo.h (stackinfo_get_sp): Define.
(stackinfo_sub_sp): Define.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/i386/stackinfo.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sysdeps/i386/stackinfo.h b/sysdeps/i386/stackinfo.h index a9a6745aaf..2530ea7234 100644 --- a/sysdeps/i386/stackinfo.h +++ b/sysdeps/i386/stackinfo.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -25,4 +25,14 @@ /* On x86 the stack grows down. */ #define _STACK_GROWS_DOWN 1 +/* Access to the stack pointer. The macros are used in alloca_account + for which they need to act as barriers as well, hence the additional + (unnecessary) parameters. */ +#define stackinfo_get_sp() \ + ({ void *p__; asm volatile ("mov %%esp, %0" : "=r" (p__)); p__; }) +#define stackinfo_sub_sp(ptr) \ + ({ ptrdiff_t d__; \ + asm volatile ("sub %%esp, %0" : "=r" (d__) : "0" (ptr)); \ + d__; }) + #endif /* stackinfo.h */ |