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glibc  2.9
jmpbuf-unwind.h
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00001 /* Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the 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; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <setjmp.h>
00021 #include <jmpbuf-offsets.h>
00022 #include <stdint.h>
00023 #include <unwind.h>
00024 #include <sysdep.h>
00025 
00026 /* Test if longjmp to JMPBUF would unwind the frame containing a local
00027    variable at ADDRESS.  */
00028 #define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
00029   ((void *)(_address) < (void *) _demangle ((_jmpbuf)[JB_SP]))
00030 
00031 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
00032   _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
00033 
00034 static inline uintptr_t __attribute__ ((unused))
00035 _jmpbuf_sp (__jmp_buf regs)
00036 {
00037   uintptr_t sp = regs[JB_SP];
00038 #ifdef PTR_DEMANGLE
00039   PTR_DEMANGLE (sp);
00040 #endif
00041   return sp;
00042 }
00043 
00044 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
00045   ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
00046 
00047 /* We use the normal longjmp for unwinding.  */
00048 #define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)