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glibc  2.9
setjmp.c
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00001 /* Copyright (C) 1991, 1992, 1994, 1997 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  
00018 
00019    Derived from @(#)_setjmp.s      5.7 (Berkeley) 6/27/88,
00020    Copyright (C) 1980 Regents of the University of California.
00021    All rights reserved.
00022 
00023    Redistribution and use in source and binary forms, with or without
00024    modification, are permitted provided that the following conditions
00025    are met:
00026 
00027    1. Redistributions of source code must retain the above copyright
00028       notice, this list of conditions and the following disclaimer.
00029    2. Redistributions in binary form must reproduce the above copyright
00030       notice, this list of conditions and the following disclaimer in the
00031       documentation and/or other materials provided with the distribution.
00032    4. Neither the name of the University nor the names of its contributors
00033       may be used to endorse or promote products derived from this software
00034       without specific prior written permission.
00035    
00036    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
00037    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00038    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00039    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
00040    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00041    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00042    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00043    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00044    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00045    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00046    SUCH DAMAGE.
00047 */
00048 
00049 #include <setjmp.h>
00050 
00051 
00052 /* Save the current program position in ENV and return 0.  */
00053 int
00054 __sigsetjmp (jmp_buf env, int savemask)
00055 {
00056   /* Save our caller's FP and PC.  */
00057   asm ("movl 12(fp), %0" : "=g" (env[0].__jmpbuf[0].__fp));
00058   asm ("movl 16(fp), %0" : "=g" (env[0].__jmpbuf[0].__pc));
00059 
00060   /* Save the signal mask if requested.  */
00061   return __sigjmp_save (env, savemask);
00062 }