1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31/ longjmp(env, val) 32/ will generate a "return(val)" from 33/ the last call to 34/ setjmp(env) 35/ by restoring registers ip, sp, bp, bx, si, and di from 'env' 36/ and doing a return. 37 38/ entry reg offset from (%si) 39/ env[0] = %ebx 0 / register variables 40/ env[1] = %esi 4 41/ env[2] = %edi 8 42/ env[3] = %ebp 12 / stack frame 43/ env[4] = %esp 16 44/ env[5] = %eip 20 45 46#include <sys/asm_linkage.h> 47 48 ANSI_PRAGMA_WEAK(setjmp,function) 49 ANSI_PRAGMA_WEAK(longjmp,function) 50 51#include "SYS.h" 52 53 ENTRY(setjmp) 54 movl 4(%esp),%eax / jmpbuf address 55 movl %ebx,0(%eax) / save ebx 56 movl %esi,4(%eax) / save esi 57 movl %edi,8(%eax) / save edi 58 movl %ebp,12(%eax) / save caller's ebp 59 popl %edx / return address 60 movl %esp,16(%eax) / save caller's esp 61 movl %edx,20(%eax) 62 subl %eax,%eax / return 0 63 pushl %edx 64 ret 65 SET_SIZE(setjmp) 66 67 ENTRY(longjmp) 68 movl 4(%esp),%edx / first parameter after return addr 69 movl 8(%esp),%eax / second parameter 70 movl 0(%edx),%ebx / restore ebx 71 movl 4(%edx),%esi / restore esi 72 movl 8(%edx),%edi / restore edi 73 movl 12(%edx),%ebp / restore caller's ebp 74 movl 16(%edx),%esp / restore caller's esp 75 test %eax,%eax / if val != 0 76 jnz .ret / return val 77 incl %eax / else return 1 78.ret: 79 jmp *20(%edx) / return to caller 80 SET_SIZE(longjmp) 81