runtime: reset DF flag after running external code on 386

R=r CC=golang-dev https://golang.org/cl/186108

runtime: reset DF flag after running external code on 386
R=r CC=golang-dev https://golang.org/cl/186108
f85abf01 · Russ Cox · 63d63929 · f85abf01
Commit f85abf01 authored Jan 13, 2010 by Russ Cox
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src/pkg/runtime/386/asm.s src/pkg/runtime/386/asm.s +4 -0

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--- a/src/pkg/runtime/386/asm.s
+++ b/src/pkg/runtime/386/asm.s
@@ -350,6 +350,10 @@ TEXT	runcgo(SB),7,$16
 	MOVL	CX, 4(SP)
 	MOVL	BX, 0(SP)
 	CALL	AX
+	// Back; switch to original stack, re-establish
+	// "DF is clear" invariant.
+	CLD
 	MOVL	4(SP), SP
 	RET