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 rip rsp rbp rbx r12 r13 r14 r15 from 'env' 41 * and doing a return. 42 * 43 * entry reg offset 44 * env[0] = %rbx 0 register variables 45 * env[1] = %r12 8 46 * env[2] = %r13 16 47 * env[3] = %r14 24 48 * env[4] = %r15 32 49 * env[5] = %rbp 40 stack frame 50 * env[6] = %rsp 48 51 * env[7] = %rip 56 52 */ 53 54#if defined(__lint) 55/*ARGSUSED*/ 56int 57setjmp(jmp_buf env) 58{ 59 return (0); 60} 61 62/*ARGSUSED*/ 63int 64sigsetjmp(sigjmp_buf env, int savemask) 65{ 66 return (0); 67} 68#else /* __lint */ 69 70 ENTRY(setjmp) 71 ALTENTRY(sigsetjmp) 72 movq %rbx, 0(%rdi) 73 movq %r12, 8(%rdi) 74 movq %r13, 16(%rdi) 75 movq %r14, 24(%rdi) 76 movq %r15, 32(%rdi) 77 movq %rbp, 40(%rdi) 78 popq %rdx /* return address */ 79 movq %rsp, 48(%rdi) 80 movq %rdx, 56(%rdi) 81 xorl %eax, %eax /* return 0 */ 82 jmp *%rdx 83 SET_SIZE(sigsetjmp) 84 SET_SIZE(setjmp) 85 86#endif /* __lint */ 87 88#if defined(__lint) 89/*ARGSUSED*/ 90void 91longjmp(jmp_buf env, int val) 92{ 93} 94 95/*ARGSUSED*/ 96void 97siglongjmp(sigjmp_buf env, int val) 98{ 99} 100#else /* __lint */ 101 102 ENTRY(longjmp) 103 ALTENTRY(siglongjmp) 104 movq 0(%rdi), %rbx 105 movq 8(%rdi), %r12 106 movq 16(%rdi), %r13 107 movq 24(%rdi), %r14 108 movq 32(%rdi), %r15 109 movq 40(%rdi), %rbp 110 movq 48(%rdi), %rsp 111 movl %esi, %eax 112 test %eax, %eax /* if val != 0 */ 113 jnz 1f /* return val */ 114 incl %eax /* else return 1 */ 1151: 116 movq 56(%rdi), %rdx /* return to caller of setjmp */ 117 jmp *%rdx 118 SET_SIZE(siglongjmp) 119 SET_SIZE(longjmp) 120 121#endif /* __lint */ 122