scoutos / prex-0.9.0 / usr / arch / x86 / setjmp.S @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*- |
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2 | * Copyright (c) 1990, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * This code is derived from software contributed to Berkeley by |
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6 | * William Jolitz. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * 1. Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * 3. Neither the name of the University nor the names of its contributors |
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17 | * may be used to endorse or promote products derived from this software |
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18 | * without specific prior written permission. |
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19 | * |
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20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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30 | * SUCH DAMAGE. |
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31 | */ |
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32 | |||
33 | /* |
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34 | * C library -- _setjmp, _longjmp |
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35 | * |
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36 | * longjmp(a,v) |
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37 | * will generate a "return(v)" from the last call to |
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38 | * setjmp(a) |
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39 | * by restoring registers from the stack. |
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40 | * The previous signal state is restored. |
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41 | */ |
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42 | |||
43 | /* #include "DEFS.h" */ |
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44 | #include <machine/asm.h> |
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45 | |||
46 | ENTRY(setjmp) |
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47 | pushl $0 |
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48 | call sigblock |
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49 | popl %edx |
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50 | movl 4(%esp),%ecx |
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51 | movl 0(%esp),%edx |
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52 | movl %edx, 0(%ecx) |
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53 | movl %ebx, 4(%ecx) |
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54 | movl %esp, 8(%ecx) |
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55 | movl %ebp,12(%ecx) |
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56 | movl %esi,16(%ecx) |
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57 | movl %edi,20(%ecx) |
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58 | movl %eax,24(%ecx) |
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59 | movl $0,%eax |
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60 | ret |
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61 | |||
62 | ENTRY(longjmp) |
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63 | movl 4(%esp),%edx |
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64 | pushl 24(%edx) |
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65 | call sigsetmask |
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66 | popl %eax |
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67 | movl 4(%esp),%edx |
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68 | movl 8(%esp),%eax |
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69 | movl 0(%edx),%ecx |
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70 | movl 4(%edx),%ebx |
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71 | movl 8(%edx),%esp |
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72 | movl 12(%edx),%ebp |
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73 | movl 16(%edx),%esi |
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74 | movl 20(%edx),%edi |
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75 | cmpl $0,%eax |
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76 | jne 1f |
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77 | movl $1,%eax |
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78 | 1: movl %ecx,0(%esp) |
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79 | ret |