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