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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [sysvi386/] [_longjmp.S] - Blame information for rev 207

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Line No. Rev Author Line
1 207 jeremybenn
/
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/ our buffer looks like:
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/  eax,ebx,ecx,edx,esi,edi,esp,ebp,pc
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/
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/ _longjmp is called with two parameters:  jmp_buf*,int
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/ jmp_buf* is at 4(%esp), int is at 8(%esp)
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/ retaddr is, of course, at (%esp)
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        .globl  _longjmp
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        .globl  longjmp
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_longjmp:
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longjmp:
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        movl    4(%esp), %ebx   / address of buf
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        movl    8(%esp), %eax   / store return value
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        movl    24(%ebx), %esp  / restore stack
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        movl    32(%ebx), %edi
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/ Next line sets up return address.
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        movl    %edi, 0(%esp)
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        movl    8(%ebx), %ecx
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        movl    12(%ebx), %edx
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        movl    16(%ebx), %esi
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        movl    20(%ebx), %edi
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        movl    28(%ebx), %ebp
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        movl    4(%ebx), %ebx
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        testl   %eax,%eax
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        jne     bye
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        incl    %eax            / eax hold 0 if we are here
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bye:
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        ret
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