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runtime: debugging help on 386

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R=r
CC=golang-dev
https://golang.org/cl/3502041
This commit is contained in:
Russ Cox 2010-12-07 17:19:36 -05:00
parent 49014c5b12
commit 7e14bd81f4
1 changed files with 3 additions and 1 deletions
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4
src/pkg/runtime/386/asm.s
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@ -177,7 +177,9 @@ TEXT runtime·morestack(SB),7,$0
// Call newstack on m's scheduling stack.
MOVL m_g0(BX), BP
MOVL BP, g(CX)
MOVL (m_sched+gobuf_sp)(BX), SP
MOVL (m_sched+gobuf_sp)(BX), AX
MOVL -4(AX), BX // fault if CALL would, before smashing SP
MOVL AX, SP
CALL runtime·newstack(SB)
MOVL $0, 0x1003 // crash if newstack returns
RET