_setjmp.S revision 1.6
1 1.6 agc /* $NetBSD: _setjmp.S,v 1.6 2003/08/07 16:42:06 agc Exp $ */ 2 1.5 christos 3 1.1 cgd /*- 4 1.1 cgd * Copyright (c) 1990 The Regents of the University of California. 5 1.1 cgd * All rights reserved. 6 1.1 cgd * 7 1.1 cgd * This code is derived from software contributed to Berkeley by 8 1.1 cgd * William Jolitz. 9 1.1 cgd * 10 1.1 cgd * Redistribution and use in source and binary forms, with or without 11 1.1 cgd * modification, are permitted provided that the following conditions 12 1.1 cgd * are met: 13 1.1 cgd * 1. Redistributions of source code must retain the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer. 15 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 cgd * notice, this list of conditions and the following disclaimer in the 17 1.1 cgd * documentation and/or other materials provided with the distribution. 18 1.6 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 cgd * may be used to endorse or promote products derived from this software 20 1.1 cgd * without specific prior written permission. 21 1.1 cgd * 22 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 cgd * SUCH DAMAGE. 33 1.3 jtc * 34 1.3 jtc * from: @(#)_setjmp.s 5.1 (Berkeley) 4/23/90 35 1.1 cgd */ 36 1.1 cgd 37 1.4 jtc #include <machine/asm.h> 38 1.3 jtc #if defined(LIBC_SCCS) 39 1.6 agc RCSID("$NetBSD: _setjmp.S,v 1.6 2003/08/07 16:42:06 agc Exp $") 40 1.3 jtc #endif 41 1.1 cgd 42 1.1 cgd /* 43 1.1 cgd * C library -- _setjmp, _longjmp 44 1.1 cgd * 45 1.1 cgd * _longjmp(a,v) 46 1.1 cgd * will generate a "return(v)" from the last call to 47 1.1 cgd * _setjmp(a) 48 1.1 cgd * by restoring registers from the stack. 49 1.1 cgd * The previous signal state is NOT restored. 50 1.1 cgd */ 51 1.1 cgd 52 1.1 cgd ENTRY(_setjmp) 53 1.1 cgd movl 4(%esp),%eax 54 1.1 cgd movl 0(%esp),%edx 55 1.1 cgd movl %edx, 0(%eax) /* rta */ 56 1.1 cgd movl %ebx, 4(%eax) 57 1.1 cgd movl %esp, 8(%eax) 58 1.1 cgd movl %ebp,12(%eax) 59 1.1 cgd movl %esi,16(%eax) 60 1.1 cgd movl %edi,20(%eax) 61 1.2 jtc xorl %eax,%eax 62 1.1 cgd ret 63 1.1 cgd 64 1.1 cgd ENTRY(_longjmp) 65 1.1 cgd movl 4(%esp),%edx 66 1.1 cgd movl 8(%esp),%eax 67 1.1 cgd movl 0(%edx),%ecx 68 1.1 cgd movl 4(%edx),%ebx 69 1.1 cgd movl 8(%edx),%esp 70 1.1 cgd movl 12(%edx),%ebp 71 1.1 cgd movl 16(%edx),%esi 72 1.1 cgd movl 20(%edx),%edi 73 1.2 jtc testl %eax,%eax 74 1.2 jtc jnz 1f 75 1.2 jtc incl %eax 76 1.1 cgd 1: movl %ecx,0(%esp) 77 1.1 cgd ret 78
Indexes created Sun Sep 28 16:09:52 GMT 2025