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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [sys/] [go32/] [longjmp.S] - Blame information for rev 1765

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1 39 lampret
/* This is file LONGJMP.S */
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/*
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** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
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**
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** This file is distributed under the terms listed in the document
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** "copying.dj", available from DJ Delorie at the address above.
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained.  This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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**      jmp_buf:
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**       eax ebx ecx edx esi edi ebp esp eip es fs gs ss
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**       0   4   8   12  16  20  24  28  32  36 38 40 42
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*/
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        .globl  _longjmp /* jmp_buf, int */
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_longjmp:
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        pushl   %ebp
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        movl    %esp,%ebp
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        movl    8(%ebp),%edi    /* get jmp_buf */
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        movl    12(%ebp),%eax   /* store retval in j->eax */
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        testl   %eax,%eax
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        jne 0f
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        incl %eax
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0:
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        movl    %eax,0(%edi)
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        movl    24(%edi),%ebp
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        pushfl                  /* get flags so will only re-enable */
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        popl    %ebx            /* interrupts if they were previously */
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                                /* enabled */
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        cli
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        movw    42(%edi),%ax
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        movw    %ax,%ss
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        movl    28(%edi),%esp
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        pushl   32(%edi)        /* for a ret! */
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        pushl   %ebx            /* save flags that contain previous */
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                                /* interrupt state */
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        movw    36(%edi),%ax
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        movw    %ax,%es
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        movw    38(%edi),%ax
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        movw    %ax,%fs
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        movw    40(%edi),%ax
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        movw    %ax,%gs
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        movl    0(%edi),%eax
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        movl    4(%edi),%ebx
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        movl    8(%edi),%ecx
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        movl    12(%edi),%edx
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        movl    16(%edi),%esi
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        movl    20(%edi),%edi
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        popfl                   /* restore previous interrupt state */
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        ret                     /* actually jump to new eip */

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