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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#if defined(LIBC_RCS) && !defined(lint) 38 .text 39 .asciz "$FreeBSD$" 40#endif /* LIBC_RCS and not lint */ 41 42/* 43 * C library -- _setjmp, _longjmp 44 * 45 * _longjmp(a,v) 46 * will generate a "return(v)" from the last call to 47 * _setjmp(a) 48 * by restoring registers from the environment 'a'. 49 * The previous signal state is NOT restored. 50 */ 51 52#include <machine/asm.h> 53 54ENTRY(_setjmp) 55 movl 4(%esp),%eax 56 movl 0(%esp),%edx 57 movl %edx, 0(%eax) /* rta */ 58 movl %ebx, 4(%eax) 59 movl %esp, 8(%eax) 60 movl %ebp,12(%eax) 61 movl %esi,16(%eax) 62 movl %edi,20(%eax) 63 fnstcw 24(%eax) 64 xorl %eax,%eax 65 ret 66 67 .weak CNAME(_longjmp) 68 .set CNAME(_longjmp),CNAME(___longjmp) 69ENTRY(___longjmp) 70 movl 4(%esp),%edx 71 movl 8(%esp),%eax 72 movl 0(%edx),%ecx 73 movl 4(%edx),%ebx 74 movl 8(%edx),%esp 75 movl 12(%edx),%ebp 76 movl 16(%edx),%esi 77 movl 20(%edx),%edi 78 fninit 79 fldcw 24(%edx) 80 testl %eax,%eax 81 jnz 1f 82 incl %eax 831: movl %ecx,0(%esp) 84 ret 85