Annotation of sys/lib/libkern/arch/i386/setjmp.S, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: setjmp.S,v 1.3 2003/06/02 23:28:08 millert Exp $ */
! 2: /* $NetBSD: setjmp.S,v 1.5 1994/10/26 06:39:14 cgd Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1990 The Regents of the University of California.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to Berkeley by
! 9: * William Jolitz.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: *
! 35: * @(#)setjmp.s 5.1 (Berkeley) 4/23/90
! 36: */
! 37:
! 38: /*
! 39: * C library -- _setjmp, _longjmp
! 40: *
! 41: * longjmp(a,v)
! 42: * will generate a "return(v)" from the last call to
! 43: * setjmp(a)
! 44: * by restoring registers from the stack.
! 45: * The previous signal state is restored.
! 46: */
! 47:
! 48: #include "DEFS.h"
! 49: #include "SYS.h"
! 50:
! 51: ENTRY(setjmp)
! 52: pushl $0
! 53: call PIC_PLT(_sigblock)
! 54: popl %edx
! 55: movl 4(%esp),%ecx
! 56: movl 0(%esp),%edx
! 57: movl %edx, 0(%ecx)
! 58: movl %ebx, 4(%ecx)
! 59: movl %esp, 8(%ecx)
! 60: movl %ebp,12(%ecx)
! 61: movl %esi,16(%ecx)
! 62: movl %edi,20(%ecx)
! 63: movl %eax,24(%ecx)
! 64: xorl %eax,%eax
! 65: ret
! 66:
! 67: ENTRY(longjmp)
! 68: movl 4(%esp),%edx
! 69: pushl 24(%edx)
! 70: call PIC_PLT(_sigsetmask)
! 71: popl %eax
! 72: movl 4(%esp),%edx
! 73: movl 8(%esp),%eax
! 74: movl 0(%edx),%ecx
! 75: movl 4(%edx),%ebx
! 76: movl 8(%edx),%esp
! 77: movl 12(%edx),%ebp
! 78: movl 16(%edx),%esi
! 79: movl 20(%edx),%edi
! 80: testl %eax,%eax
! 81: jnz 1f
! 82: incl %eax
! 83: 1: movl %ecx,0(%esp)
! 84: ret
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