1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_RCS) && !defined(lint) 34 .text 35 .asciz "$FreeBSD$" 36#endif /* LIBC_RCS and not lint */ 37 38/* 39 * C library -- _setjmp, _longjmp 40 * 41 * _longjmp(a,v) 42 * will generate a "return(v)" from the last call to 43 * _setjmp(a) 44 * by restoring registers from the environment 'a'. 45 * The previous signal state is NOT restored. 46 */ 47 48#include <machine/asm.h> 49 50ENTRY(_setjmp) 51 movl 4(%esp),%eax 52 movl 0(%esp),%edx 53 movl %edx, 0(%eax) /* rta */ 54 movl %ebx, 4(%eax) 55 movl %esp, 8(%eax) 56 movl %ebp,12(%eax) 57 movl %esi,16(%eax) 58 movl %edi,20(%eax) 59 xorl %eax,%eax 60 ret 61END(_setjmp) 62 63ENTRY(_longjmp) 64 movl 4(%esp),%edx 65 movl 8(%esp),%eax 66 movl 0(%edx),%ecx 67 movl 4(%edx),%ebx 68 movl 8(%edx),%esp 69 movl 12(%edx),%ebp 70 movl 16(%edx),%esi 71 movl 20(%edx),%edi 72 testl %eax,%eax 73 jnz 1f 74 incl %eax 751: movl %ecx,0(%esp) 76 ret 77END(_longjmp) 78