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