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runtime: save cdecl registers in Windows SEH handler

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Fixes #1779

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4566041
This commit is contained in:
Alexey Borzenkov 2011-05-31 10:11:47 -04:00 committed by Russ Cox
parent 463f478dbb
commit c4206cb231
1 changed files with 11 additions and 5 deletions
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16
src/pkg/runtime/windows/386/sys.s
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@ -59,15 +59,21 @@ TEXT runtime·setlasterror(SB),7,$0
TEXT runtime·sigtramp(SB),7,$0
PUSHL BP // cdecl
PUSHL BX
PUSHL SI
PUSHL DI
PUSHL 0(FS)
CALL runtime·sigtramp1(SB)
POPL 0(FS)
POPL DI
POPL SI
POPL BX
POPL BP
RET
TEXT runtime·sigtramp1(SB),0,$16-28
TEXT runtime·sigtramp1(SB),0,$16-40
// unwinding?
MOVL info+12(FP), BX
MOVL info+24(FP), BX
MOVL 4(BX), CX // exception flags
ANDL $6, CX
MOVL $1, AX
@ -75,15 +81,15 @@ TEXT runtime·sigtramp1(SB),0,$16-28
// place ourselves at the top of the SEH chain to
// ensure SEH frames lie within thread stack bounds
MOVL frame+16(FP), CX // our SEH frame
MOVL frame+28(FP), CX // our SEH frame
MOVL CX, 0(FS)
// copy arguments for call to sighandler
MOVL BX, 0(SP)
MOVL CX, 4(SP)
MOVL context+20(FP), BX
MOVL context+32(FP), BX
MOVL BX, 8(SP)
MOVL dispatcher+24(FP), BX
MOVL dispatcher+36(FP), BX
MOVL BX, 12(SP)
CALL runtime·sighandler(SB)