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glibc  2.9
machine-sp.h
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00001 /* Machine-specific function to return the stack pointer.  PowerPC version.
00002    Copyright (C) 2001, 2007 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public License as
00007    published by the Free Software Foundation; either version 2.1 of the
00008    License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; see the file COPYING.LIB.  If not,
00017    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00018    Boston, MA 02111-1307, USA.  */
00019 
00020 #ifndef _MACHINE_SP_H
00021 #define _MACHINE_SP_H
00022 
00023 /* Return the current stack pointer.  */
00024 
00025 #ifndef _EXTERN_INLINE
00026 /* Make sure this function is included in hurd/threadvar-inlines.c.  */
00027 # ifdef _HURD_THREADVAR_H_EXTERN_INLINE
00028 #  define _EXTERN_INLINE _HURD_THREADVAR_H_EXTERN_INLINE
00029 # else
00030 #  define _EXTERN_INLINE __extern_inline
00031 # endif
00032 #endif
00033 
00034 _EXTERN_INLINE void *
00035 __thread_stack_pointer (void)
00036 {
00037   register void *__sp__;
00038   __asm__ ("mr %0, 1" : "=r" (__sp__));
00039   return __sp__;
00040 }
00041 
00042 #endif /* machine-sp.h */