setjmp.S revision 5244
1178476Sjb/*- 2178476Sjb * Copyright (c) 1990 The Regents of the University of California. 3178476Sjb * All rights reserved. 4178476Sjb * 5178476Sjb * This code is derived from software contributed to Berkeley by 6178476Sjb * William Jolitz. 7178476Sjb * 8178476Sjb * Redistribution and use in source and binary forms, with or without 9178476Sjb * modification, are permitted provided that the following conditions 10178476Sjb * are met: 11178476Sjb * 1. Redistributions of source code must retain the above copyright 12178476Sjb * notice, this list of conditions and the following disclaimer. 13178476Sjb * 2. Redistributions in binary form must reproduce the above copyright 14178476Sjb * notice, this list of conditions and the following disclaimer in the 15178476Sjb * documentation and/or other materials provided with the distribution. 16178476Sjb * 3. All advertising materials mentioning features or use of this software 17178476Sjb * must display the following acknowledgement: 18178476Sjb * This product includes software developed by the University of 19178476Sjb * California, Berkeley and its contributors. 20178476Sjb * 4. Neither the name of the University nor the names of its contributors 21178476Sjb * may be used to endorse or promote products derived from this software 22178476Sjb * without specific prior written permission. 23178476Sjb * 24178476Sjb * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25178476Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26178476Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27178476Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28178476Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29178476Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30178476Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31178476Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32178476Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33178476Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34178476Sjb * SUCH DAMAGE. 35178476Sjb */ 36178476Sjb 37178476Sjb#if defined(LIBC_SCCS) && !defined(lint) 38178476Sjb .asciz "@(#)setjmp.s 5.1 (Berkeley) 4/23/90" 39178476Sjb#endif /* LIBC_SCCS and not lint */ 40178476Sjb 41178476Sjb/* 42178476Sjb * C library -- _setjmp, _longjmp 43178476Sjb * 44178476Sjb * longjmp(a,v) 45178476Sjb * will generate a "return(v)" from the last call to 46178476Sjb * setjmp(a) 47178476Sjb * by restoring registers from the environment 'a'. 48178476Sjb * The previous signal state is restored. 49178476Sjb */ 50178476Sjb 51178476Sjb#include "DEFS.h" 52178476Sjb#include "SYS.h" 53178476Sjb 54178476SjbENTRY(setjmp) 55178476Sjb pushl $0 56178476Sjb call PIC_PLT(_sigblock) 57178476Sjb popl %edx 58 movl 4(%esp),%ecx 59 movl 0(%esp),%edx 60 movl %edx, 0(%ecx) 61 movl %ebx, 4(%ecx) 62 movl %esp, 8(%ecx) 63 movl %ebp,12(%ecx) 64 movl %esi,16(%ecx) 65 movl %edi,20(%ecx) 66 movl %eax,24(%ecx) 67 fnstcw 28(%ecx) 68 xorl %eax,%eax 69 ret 70 71ENTRY(longjmp) 72 movl 4(%esp),%edx 73 pushl 24(%edx) 74 call PIC_PLT(_sigsetmask) /* XXX this is not reentrant */ 75 popl %eax 76 movl 4(%esp),%edx 77 movl 8(%esp),%eax 78 movl 0(%edx),%ecx 79 movl 4(%edx),%ebx 80 movl 8(%edx),%esp 81 movl 12(%edx),%ebp 82 movl 16(%edx),%esi 83 movl 20(%edx),%edi 84 fninit 85 fldcw 28(%edx) 86 testl %eax,%eax 87 jnz 1f 88 incl %eax 891: movl %ecx,0(%esp) 90 ret 91