setjmp.S revision 165903
1164426Ssam/*- 2164426Ssam * Copyright (c) 1990 The Regents of the University of California. 3164426Ssam * All rights reserved. 4164426Ssam * 5164426Ssam * This code is derived from software contributed to Berkeley by 6164426Ssam * William Jolitz. 7164426Ssam * 8164426Ssam * Redistribution and use in source and binary forms, with or without 9164426Ssam * modification, are permitted provided that the following conditions 10164426Ssam * are met: 11164426Ssam * 1. Redistributions of source code must retain the above copyright 12164426Ssam * notice, this list of conditions and the following disclaimer. 13164426Ssam * 2. Redistributions in binary form must reproduce the above copyright 14164426Ssam * notice, this list of conditions and the following disclaimer in the 15164426Ssam * documentation and/or other materials provided with the distribution. 16164426Ssam * 4. Neither the name of the University nor the names of its contributors 17164426Ssam * may be used to endorse or promote products derived from this software 18164426Ssam * without specific prior written permission. 19164426Ssam * 20164426Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21164426Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22164426Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23164426Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24164426Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25164426Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26164426Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27164426Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28164426Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29164426Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30164426Ssam * SUCH DAMAGE. 31164426Ssam */ 32164426Ssam 33164426Ssam#if defined(LIBC_SCCS) && !defined(lint) 34164426Ssam .asciz "@(#)setjmp.s 5.1 (Berkeley) 4/23/90" 35164426Ssam#endif /* LIBC_SCCS and not lint */ 36164426Ssam#include <machine/asm.h> 37164426Ssam__FBSDID("$FreeBSD: head/lib/libc/i386/gen/setjmp.S 165903 2007-01-09 00:28:16Z imp $"); 38164426Ssam 39164426Ssam/* 40164426Ssam * C library -- _setjmp, _longjmp 41164426Ssam * 42164426Ssam * longjmp(a,v) 43164426Ssam * will generate a "return(v)" from the last call to 44164426Ssam * setjmp(a) 45164426Ssam * by restoring registers from the environment 'a'. 46164426Ssam * The previous signal state is restored. 47164426Ssam */ 48164426Ssam 49186352Ssam#include "SYS.h" 50186418Ssam 51186352SsamENTRY(setjmp) 52186352Ssam movl 4(%esp),%ecx 53186352Ssam PIC_PROLOGUE 54164426Ssam leal 28(%ecx), %eax 55164426Ssam pushl %eax /* (sigset_t*)oset */ 56164426Ssam pushl $0 /* (sigset_t*)set */ 57164426Ssam pushl $1 /* SIG_BLOCK */ 58164426Ssam call PIC_PLT(CNAME(_sigprocmask)) 59164426Ssam addl $12,%esp 60164426Ssam PIC_EPILOGUE 61164426Ssam movl 4(%esp),%ecx 62164426Ssam movl 0(%esp),%edx 63164426Ssam movl %edx, 0(%ecx) 64166064Scognet movl %ebx, 4(%ecx) 65164426Ssam movl %esp, 8(%ecx) 66164426Ssam movl %ebp,12(%ecx) 67194653Ssam movl %esi,16(%ecx) 68194653Ssam movl %edi,20(%ecx) 69164426Ssam fnstcw 24(%ecx) 70164426Ssam xorl %eax,%eax 71164426Ssam ret 72164426Ssam 73164426Ssam .weak CNAME(longjmp) 74164426Ssam .set CNAME(longjmp),CNAME(__longjmp) 75164426SsamENTRY(__longjmp) 76164426Ssam movl 4(%esp),%edx 77164426Ssam PIC_PROLOGUE 78164426Ssam pushl $0 /* (sigset_t*)oset */ 79164426Ssam leal 28(%edx), %eax 80164426Ssam pushl %eax /* (sigset_t*)set */ 81164426Ssam pushl $3 /* SIG_SETMASK */ 82164426Ssam call PIC_PLT(CNAME(_sigprocmask)) 83166064Scognet addl $12,%esp 84164426Ssam PIC_EPILOGUE 85164426Ssam movl 4(%esp),%edx 86164426Ssam movl 8(%esp),%eax 87164426Ssam movl 0(%edx),%ecx 88164426Ssam movl 4(%edx),%ebx 89164426Ssam movl 8(%edx),%esp 90164426Ssam movl 12(%edx),%ebp 91164426Ssam movl 16(%edx),%esi 92164426Ssam movl 20(%edx),%edi 93164426Ssam fninit 94164426Ssam fldcw 24(%edx) 95215319Sthompsa testl %eax,%eax 96215319Sthompsa jnz 1f 97215319Sthompsa incl %eax 98164426Ssam1: movl %ecx,0(%esp) 99164426Ssam ret 100164426Ssam