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#pragma ident "%Z%%M% %I% %E% SMI" 28 29#if defined(__lint) 30#include <setjmp.h> 31#endif 32 33#include <sys/asm_linkage.h> 34 35/* 36 * longjmp(env, val) 37 * will generate a "return(val)" from 38 * the last call to 39 * setjmp(env) 40 * by restoring registers ip, sp, bp, bx, si, and di from 'env' 41 * and doing a return. 42 * 43 * entry reg offset from (%si) 44 * env[0] = %ebx 0 / register variables 45 * env[1] = %esi 4 46 * env[2] = %edi 8 47 * env[3] = %ebp 12 / stack frame 48 * env[4] = %esp 16 49 * env[5] = %eip 20 50 */ 51 52#if defined(__lint) 53/* ARGSUSED */ 54int 55setjmp(jmp_buf env) 56{ 57 return (0); 58} 59 60/* ARGSUSED */ 61int 62sigsetjmp(sigjmp_buf env, int savemask) 63{ 64 return (0); 65} 66#else /* __lint */ 67 68 ENTRY(setjmp) 69 ALTENTRY(sigsetjmp) 70 movl 4(%esp),%eax / jmpbuf address 71 movl %ebx,0(%eax) / save ebx 72 movl %esi,4(%eax) / save esi 73 movl %edi,8(%eax) / save edi 74 movl %ebp,12(%eax) / save caller's ebp 75 popl %edx / return address 76 movl %esp,16(%eax) / save caller's esp 77 movl %edx,20(%eax) 78 subl %eax,%eax / return 0 79 jmp *%edx 80 SET_SIZE(sigsetjmp) 81 SET_SIZE(setjmp) 82 83#endif /* __lint */ 84 85#if defined(__lint) 86/* ARGSUSED */ 87void 88longjmp(jmp_buf env, int val) 89{ 90} 91 92/* ARGSUSED */ 93void 94siglongjmp(sigjmp_buf env, int val) 95{ 96} 97#else /* __lint */ 98 99 ENTRY(longjmp) 100 ALTENTRY(siglongjmp) 101 movl 4(%esp),%edx / first parameter after return addr 102 movl 8(%esp),%eax / second parameter 103 movl 0(%edx),%ebx / restore ebx 104 movl 4(%edx),%esi / restore esi 105 movl 8(%edx),%edi / restore edi 106 movl 12(%edx),%ebp / restore caller's ebp 107 movl 16(%edx),%esp / restore caller's esp 108 test %eax,%eax / if val != 0 109 jnz .ret / return val 110 incl %eax / else return 1 111.ret: 112 jmp *20(%edx) / return to caller 113 SET_SIZE(siglongjmp) 114 SET_SIZE(longjmp) 115 116#endif /* __lint */ 117