root / prex-0.9.0 / usr / arch / x86 / setjmp.S @ 03e9c04a
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/*- |
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* Copyright (c) 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* William Jolitz. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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/* |
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* C library -- _setjmp, _longjmp |
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* |
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* longjmp(a,v) |
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* will generate a "return(v)" from the last call to |
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* setjmp(a) |
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* by restoring registers from the stack. |
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* The previous signal state is restored. |
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*/ |
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|
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/* #include "DEFS.h" */ |
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#include <machine/asm.h> |
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|
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ENTRY(setjmp) |
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pushl $0 |
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call sigblock |
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popl %edx |
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movl 4(%esp),%ecx |
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movl 0(%esp),%edx |
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movl %edx, 0(%ecx) |
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movl %ebx, 4(%ecx) |
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movl %esp, 8(%ecx) |
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movl %ebp,12(%ecx) |
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movl %esi,16(%ecx) |
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movl %edi,20(%ecx) |
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movl %eax,24(%ecx) |
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movl $0,%eax |
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ret |
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|
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ENTRY(longjmp) |
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movl 4(%esp),%edx |
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pushl 24(%edx) |
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call sigsetmask |
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popl %eax |
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movl 4(%esp),%edx |
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movl 8(%esp),%eax |
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movl 0(%edx),%ecx |
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movl 4(%edx),%ebx |
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movl 8(%edx),%esp |
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movl 12(%edx),%ebp |
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movl 16(%edx),%esi |
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movl 20(%edx),%edi |
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cmpl $0,%eax |
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jne 1f |
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movl $1,%eax |
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1: movl %ecx,0(%esp) |
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ret |