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/* 32 * longjmp(env, val) 33 * will generate a "return(val)" from 34 * the last call to 35 * setjmp(env) 36 * by restoring registers rip rsp rbp rbx r12 r13 r14 r15 from 'env' 37 * and doing a return. 38 */ 39 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#include <sys/asm_linkage.h> 53 54 ANSI_PRAGMA_WEAK(setjmp,function) 55 ANSI_PRAGMA_WEAK(longjmp,function) 56 57#include "SYS.h" 58 59 ENTRY(setjmp) 60 movq %rbx, 0(%rdi) 61 movq %r12, 8(%rdi) 62 movq %r13, 16(%rdi) 63 movq %r14, 24(%rdi) 64 movq %r15, 32(%rdi) 65 movq %rbp, 40(%rdi) 66 popq %rdx /* return address */ 67 movq %rsp, 48(%rdi) 68 movq %rdx, 56(%rdi) 69 xorl %eax, %eax /* return 0 */ 70 jmp *%rdx 71 SET_SIZE(setjmp) 72 73 ENTRY(longjmp) 74 movq 0(%rdi), %rbx 75 movq 8(%rdi), %r12 76 movq 16(%rdi), %r13 77 movq 24(%rdi), %r14 78 movq 32(%rdi), %r15 79 movq 40(%rdi), %rbp 80 movq 48(%rdi), %rsp 81 movl %esi, %eax 82 test %eax, %eax /* if val != 0 */ 83 jnz 1f /* return val */ 84 incl %eax /* else return 1 */ 851: 86 movq 56(%rdi), %rdx /* return to caller of setjmp */ 87 jmp *%rdx 88 SET_SIZE(longjmp) 89