| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame^] | 1 | /* $OpenBSD: _setjmp.S,v 1.5 2005/08/07 11:30:38 espie Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (c) 1990 The Regents of the University of California. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This code is derived from software contributed to Berkeley by |
| 7 | * William Jolitz. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include <machine/asm.h> |
| 35 | |
| 36 | /* |
| 37 | * C library -- _setjmp, _longjmp |
| 38 | * |
| 39 | * _longjmp(a,v) |
| 40 | * will generate a "return(v)" from the last call to |
| 41 | * _setjmp(a) |
| 42 | * by restoring registers from the stack. |
| 43 | * The previous signal state is NOT restored. |
| 44 | */ |
| 45 | |
| 46 | ENTRY(_setjmp) |
| 47 | movl 4(%esp),%eax |
| 48 | movl 0(%esp),%edx |
| 49 | movl %edx, 0(%eax) /* rta */ |
| 50 | movl %ebx, 4(%eax) |
| 51 | movl %esp, 8(%eax) |
| 52 | movl %ebp,12(%eax) |
| 53 | movl %esi,16(%eax) |
| 54 | movl %edi,20(%eax) |
| 55 | xorl %eax,%eax |
| 56 | ret |
| 57 | |
| 58 | ENTRY(_longjmp) |
| 59 | movl 4(%esp),%edx |
| 60 | movl 8(%esp),%eax |
| 61 | movl 0(%edx),%ecx |
| 62 | movl 4(%edx),%ebx |
| 63 | movl 8(%edx),%esp |
| 64 | movl 12(%edx),%ebp |
| 65 | movl 16(%edx),%esi |
| 66 | movl 20(%edx),%edi |
| 67 | testl %eax,%eax |
| 68 | jnz 1f |
| 69 | incl %eax |
| 70 | 1: movl %ecx,0(%esp) |
| 71 | ret |