_setjmp.S revision 56345
191094Sdes/*- 292289Sdes * Copyright (c) 1990 The Regents of the University of California. 391094Sdes * All rights reserved. 491094Sdes * 591094Sdes * This code is derived from software contributed to Berkeley by 691094Sdes * William Jolitz. 791094Sdes * 891094Sdes * Redistribution and use in source and binary forms, with or without 991094Sdes * modification, are permitted provided that the following conditions 1091094Sdes * are met: 1191094Sdes * 1. Redistributions of source code must retain the above copyright 1291094Sdes * notice, this list of conditions and the following disclaimer. 1391094Sdes * 2. Redistributions in binary form must reproduce the above copyright 1491094Sdes * notice, this list of conditions and the following disclaimer in the 1591094Sdes * documentation and/or other materials provided with the distribution. 1691094Sdes * 3. All advertising materials mentioning features or use of this software 1791094Sdes * must display the following acknowledgement: 1891094Sdes * This product includes software developed by the University of 1991094Sdes * California, Berkeley and its contributors. 2091094Sdes * 4. Neither the name of the University nor the names of its contributors 2191094Sdes * may be used to endorse or promote products derived from this software 2291094Sdes * without specific prior written permission. 2391094Sdes * 2491094Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2591094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2691094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2791094Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2891094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2991094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3091094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3191094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3291094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3391094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3492289Sdes * SUCH DAMAGE. 3591094Sdes * 3691094Sdes * $FreeBSD: head/lib/libc/i386/gen/_setjmp.S 56345 2000-01-20 21:58:27Z jasone $ 3791097Sdes */ 3891094Sdes 3991094Sdes#if defined(LIBC_RCS) && !defined(lint) 4091094Sdes .text 4191796Sdes .asciz "$FreeBSD: head/lib/libc/i386/gen/_setjmp.S 56345 2000-01-20 21:58:27Z jasone $" 4291094Sdes#endif /* LIBC_RCS and not lint */ 4391094Sdes 4491094Sdes/* 4591094Sdes * C library -- _setjmp, _longjmp 4691094Sdes * 4791094Sdes * _longjmp(a,v) 4891094Sdes * will generate a "return(v)" from the last call to 4991094Sdes * _setjmp(a) 5091094Sdes * by restoring registers from the environment 'a'. 5191100Sdes * The previous signal state is NOT restored. 5291100Sdes */ 5391094Sdes 5491094Sdes#include "DEFS.h" 5591094Sdes 5691094SdesENTRY(_setjmp) 5791094Sdes movl 4(%esp),%eax 5891094Sdes movl 0(%esp),%edx 5991094Sdes movl %edx, 0(%eax) /* rta */ 6091094Sdes movl %ebx, 4(%eax) 6191097Sdes movl %esp, 8(%eax) 6291094Sdes movl %ebp,12(%eax) 6391094Sdes movl %esi,16(%eax) 6491094Sdes movl %edi,20(%eax) 6592289Sdes fnstcw 24(%eax) 6692289Sdes xorl %eax,%eax 6792289Sdes ret 6891094Sdes 6991094Sdes#ifdef _THREAD_SAFE 7091094SdesENTRY(___longjmp) 7191094Sdes#else 7291094SdesALTENTRY(___longjmp) 7391094SdesENTRY(_longjmp) 7491094Sdes#endif 7591094Sdes movl 4(%esp),%edx 7691094Sdes movl 8(%esp),%eax 7791094Sdes movl 0(%edx),%ecx 7891094Sdes movl 4(%edx),%ebx 7991094Sdes movl 8(%edx),%esp 8091094Sdes movl 12(%edx),%ebp 8191097Sdes movl 16(%edx),%esi 8291097Sdes movl 20(%edx),%edi 8391097Sdes fninit 8491097Sdes fldcw 24(%edx) 8591094Sdes testl %eax,%eax 8691097Sdes jnz 1f 8791097Sdes incl %eax 8891097Sdes1: movl %ecx,0(%esp) 8991094Sdes ret 9091094Sdes