17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 59a70fc3bSMark J. Nelson * Common Development and Distribution License (the "License"). 69a70fc3bSMark J. Nelson * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 213de0cfbbSRoger A. Faulkner 227c478bd9Sstevel@tonic-gate/* 233de0cfbbSRoger A. Faulkner * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 279a70fc3bSMark J. Nelson .file "setjmp.s" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate/ longjmp(env, val) 307c478bd9Sstevel@tonic-gate/ will generate a "return(val)" from 317c478bd9Sstevel@tonic-gate/ the last call to 327c478bd9Sstevel@tonic-gate/ setjmp(env) 337c478bd9Sstevel@tonic-gate/ by restoring registers ip, sp, bp, bx, si, and di from 'env' 347c478bd9Sstevel@tonic-gate/ and doing a return. 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate/ entry reg offset from (%si) 377c478bd9Sstevel@tonic-gate/ env[0] = %ebx 0 / register variables 387c478bd9Sstevel@tonic-gate/ env[1] = %esi 4 397c478bd9Sstevel@tonic-gate/ env[2] = %edi 8 407c478bd9Sstevel@tonic-gate/ env[3] = %ebp 12 / stack frame 417c478bd9Sstevel@tonic-gate/ env[4] = %esp 16 427c478bd9Sstevel@tonic-gate/ env[5] = %eip 20 433de0cfbbSRoger A. Faulkner/ env[6] = jmp flags 24 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate#include <sys/asm_linkage.h> 463de0cfbbSRoger A. Faulkner#include <../assym.h> 477c478bd9Sstevel@tonic-gate 487c478bd9Sstevel@tonic-gate ANSI_PRAGMA_WEAK(setjmp,function) 497c478bd9Sstevel@tonic-gate ANSI_PRAGMA_WEAK(longjmp,function) 507c478bd9Sstevel@tonic-gate 517c478bd9Sstevel@tonic-gate ENTRY(setjmp) 527c478bd9Sstevel@tonic-gate movl 4(%esp),%eax / jmpbuf address 537c478bd9Sstevel@tonic-gate movl %ebx,0(%eax) / save ebx 547c478bd9Sstevel@tonic-gate movl %esi,4(%eax) / save esi 557c478bd9Sstevel@tonic-gate movl %edi,8(%eax) / save edi 567c478bd9Sstevel@tonic-gate movl %ebp,12(%eax) / save caller's ebp 573de0cfbbSRoger A. Faulkner 583de0cfbbSRoger A. Faulkner movl %gs:UL_SIGLINK, %ecx 593de0cfbbSRoger A. Faulkner xorl %edx, %edx 603de0cfbbSRoger A. Faulkner test %ecx, %ecx / are we in a signal handler? 613de0cfbbSRoger A. Faulkner jnz 1f 623de0cfbbSRoger A. Faulkner inc %edx / no, tell longjmp to clear ul_siglink 633de0cfbbSRoger A. Faulkner1: movl %edx, 24(%eax) / set flag word 643de0cfbbSRoger A. Faulkner 657c478bd9Sstevel@tonic-gate popl %edx / return address 667c478bd9Sstevel@tonic-gate movl %esp,16(%eax) / save caller's esp 673de0cfbbSRoger A. Faulkner movl %edx,20(%eax) / save caller's return address 683de0cfbbSRoger A. Faulkner xorl %eax, %eax / return 0 697c478bd9Sstevel@tonic-gate pushl %edx 707c478bd9Sstevel@tonic-gate ret 717c478bd9Sstevel@tonic-gate SET_SIZE(setjmp) 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate ENTRY(longjmp) 747c478bd9Sstevel@tonic-gate movl 4(%esp),%edx / first parameter after return addr 757c478bd9Sstevel@tonic-gate movl 8(%esp),%eax / second parameter 767c478bd9Sstevel@tonic-gate movl 0(%edx),%ebx / restore ebx 777c478bd9Sstevel@tonic-gate movl 4(%edx),%esi / restore esi 787c478bd9Sstevel@tonic-gate movl 8(%edx),%edi / restore edi 797c478bd9Sstevel@tonic-gate movl 12(%edx),%ebp / restore caller's ebp 807c478bd9Sstevel@tonic-gate movl 16(%edx),%esp / restore caller's esp 813de0cfbbSRoger A. Faulkner 823de0cfbbSRoger A. Faulkner movl 24(%edx), %ecx 833de0cfbbSRoger A. Faulkner test %ecx, %ecx / test flag word 843de0cfbbSRoger A. Faulkner jz 1f 853de0cfbbSRoger A. Faulkner xorl %ecx, %ecx / if set, clear ul_siglink 863de0cfbbSRoger A. Faulkner movl %ecx, %gs:UL_SIGLINK 873de0cfbbSRoger A. Faulkner1: 887c478bd9Sstevel@tonic-gate test %eax,%eax / if val != 0 893de0cfbbSRoger A. Faulkner jnz 1f / return val 907c478bd9Sstevel@tonic-gate incl %eax / else return 1 913de0cfbbSRoger A. Faulkner1: 927c478bd9Sstevel@tonic-gate jmp *20(%edx) / return to caller 937c478bd9Sstevel@tonic-gate SET_SIZE(longjmp) 94