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Last change
on this file was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
650 bytes
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| Line | |
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| 1 | / |
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| 2 | / our buffer looks like: |
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| 3 | / eax,ebx,ecx,edx,esi,edi,esp,ebp,pc |
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| 4 | / |
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| 5 | / _longjmp is called with two parameters: jmp_buf*,int |
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| 6 | / jmp_buf* is at 4(%esp), int is at 8(%esp) |
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| 7 | / retaddr is, of course, at (%esp) |
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| 8 | |
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| 9 | .globl _longjmp |
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| 10 | .globl longjmp |
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| 11 | _longjmp: |
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| 12 | longjmp: |
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| 13 | movl 4(%esp), %ebx / address of buf |
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| 14 | movl 8(%esp), %eax / store return value |
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| 15 | |
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| 16 | movl 24(%ebx), %esp / restore stack |
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| 17 | movl 32(%ebx), %edi |
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| 18 | / Next line sets up return address. |
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| 19 | movl %edi, 0(%esp) |
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| 20 | movl 8(%ebx), %ecx |
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| 21 | movl 12(%ebx), %edx |
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| 22 | movl 16(%ebx), %esi |
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| 23 | movl 20(%ebx), %edi |
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| 24 | movl 28(%ebx), %ebp |
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| 25 | movl 4(%ebx), %ebx |
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| 26 | testl %eax,%eax |
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| 27 | jne bye |
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| 28 | incl %eax / eax hold 0 if we are here |
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| 29 | bye: |
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| 30 | ret |
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| 31 | |
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