1// SPDX-License-Identifier: CDDL-1.0 2/* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 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/* 24 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. 25 */ 26 27#define ENTRY(x) \ 28 .text; \ 29 .balign 8; \ 30 .globl x; \ 31 .type x, @function; \ 32x: 33 34#define SET_SIZE(x) \ 35 .size x, [.-x] 36 37/* 38 * Setjmp and longjmp implement non-local gotos using state vectors 39 * type label_t. 40 */ 41#ifdef __i386__ 42 43 ENTRY(setjmp) /* save area is passed in eax */ 44 movl %ebp, 0(%eax) /* save ebp */ 45 movl %ebx, 4(%eax) /* save ebx */ 46 movl %esi, 8(%eax) /* save esi */ 47 movl %edi, 12(%eax) /* save edi */ 48 movl %esp, 16(%eax) /* save esp */ 49 movl (%esp), %ecx /* %eip (return address) */ 50 movl %ecx, 20(%eax) /* save eip */ 51 subl %eax, %eax /* return 0 */ 52 ret 53 SET_SIZE(setjmp) 54 55 ENTRY(longjmp) /* save area is passed in eax */ 56 movl 0(%eax), %ebp /* restore ebp */ 57 movl 4(%eax), %ebx /* restore ebx */ 58 movl 8(%eax), %esi /* restore esi */ 59 movl 12(%eax), %edi /* restore edi */ 60 movl 16(%eax), %esp /* restore esp */ 61 movl 20(%eax), %ecx /* %eip (return address) */ 62 addl $4, %esp /* pop ret adr */ 63 jmp *%ecx /* indirect jump */ 64 SET_SIZE(longjmp) 65 66#ifdef __ELF__ 67.section .note.GNU-stack,"",%progbits 68#endif 69 70#endif /* __i386__ */ 71