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#if defined(__lint) 28#include <setjmp.h> 29#endif 30 31#include <sys/asm_linkage.h> 32 33/* 34 * longjmp(env, val) 35 * will generate a "return(val)" from 36 * the last call to 37 * setjmp(env) 38 * by restoring registers rip rsp rbp rbx r12 r13 r14 r15 from 'env' 39 * and doing a return. 40 * 41 * entry reg offset 42 * env[0] = %rbx 0 register variables 43 * env[1] = %r12 8 44 * env[2] = %r13 16 45 * env[3] = %r14 24 46 * env[4] = %r15 32 47 * env[5] = %rbp 40 stack frame 48 * env[6] = %rsp 48 49 * env[7] = %rip 56 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 movq %rbx, 0(%rdi) 71 movq %r12, 8(%rdi) 72 movq %r13, 16(%rdi) 73 movq %r14, 24(%rdi) 74 movq %r15, 32(%rdi) 75 movq %rbp, 40(%rdi) 76 popq %rdx /* return address */ 77 movq %rsp, 48(%rdi) 78 movq %rdx, 56(%rdi) 79 xorl %eax, %eax /* return 0 */ 80 jmp *%rdx 81 SET_SIZE(sigsetjmp) 82 SET_SIZE(setjmp) 83 84#endif /* __lint */ 85 86#if defined(__lint) 87/*ARGSUSED*/ 88void 89longjmp(jmp_buf env, int val) 90{ 91} 92 93/*ARGSUSED*/ 94void 95siglongjmp(sigjmp_buf env, int val) 96{ 97} 98#else /* __lint */ 99 100 ENTRY(longjmp) 101 ALTENTRY(siglongjmp) 102 movq 0(%rdi), %rbx 103 movq 8(%rdi), %r12 104 movq 16(%rdi), %r13 105 movq 24(%rdi), %r14 106 movq 32(%rdi), %r15 107 movq 40(%rdi), %rbp 108 movq 48(%rdi), %rsp 109 movl %esi, %eax 110 test %eax, %eax /* if val != 0 */ 111 jnz 1f /* return val */ 112 incl %eax /* else return 1 */ 1131: 114 movq 56(%rdi), %rdx /* return to caller of setjmp */ 115 jmp *%rdx 116 SET_SIZE(siglongjmp) 117 SET_SIZE(longjmp) 118 119#endif /* __lint */ 120