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/* 23 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26#define ENTRY(x) \ 27 .text; \ 28 .align 8; \ 29 .globl x; \ 30 .type x, @function; \ 31x: 32 33#define SET_SIZE(x) \ 34 .size x, [.-x] 35 36/* 37 * Setjmp and longjmp implement non-local gotos using state vectors 38 * type label_t. 39 */ 40#ifdef __i386__ 41 42 ENTRY(setjmp) /* save area is passed in eax */ 43 movl %ebp, 0(%eax) /* save ebp */ 44 movl %ebx, 4(%eax) /* save ebx */ 45 movl %esi, 8(%eax) /* save esi */ 46 movl %edi, 12(%eax) /* save edi */ 47 movl %esp, 16(%eax) /* save esp */ 48 movl (%esp), %ecx /* %eip (return address) */ 49 movl %ecx, 20(%eax) /* save eip */ 50 subl %eax, %eax /* return 0 */ 51 ret 52 SET_SIZE(setjmp) 53 54 ENTRY(longjmp) /* save area is passed in eax */ 55 movl 0(%eax), %ebp /* restore ebp */ 56 movl 4(%eax), %ebx /* restore ebx */ 57 movl 8(%eax), %esi /* restore esi */ 58 movl 12(%eax), %edi /* restore edi */ 59 movl 16(%eax), %esp /* restore esp */ 60 movl 20(%eax), %ecx /* %eip (return address) */ 61 addl $4, %esp /* pop ret adr */ 62 jmp *%ecx /* indirect jump */ 63 SET_SIZE(longjmp) 64 65#ifdef __ELF__ 66.section .note.GNU-stack,"",%progbits 67#endif 68 69#endif /* __i386__ */ 70