code review 824046: runtime: work around kernel bug in Snow Leopard signal ...

src/pkg/runtime/darwin/amd64/sys.s

Index: src/pkg/runtime/darwin/amd64/sys.s
===================================================================
--- a/src/pkg/runtime/darwin/amd64/sys.s
+++ b/src/pkg/runtime/darwin/amd64/sys.s
@@ -113,6 +113,7 @@
 	MOVQ	gg+24(SP), R10	// "pthread"
 // TODO(rsc): why do we get away with 0 flags here but not on 386?
 	MOVQ	$0, R8	// flags
+	MOVQ	$0, R9	// paranoia
 	MOVQ	$(0x2000000+360), AX	// bsdthread_create
 	SYSCALL
 	JCC 2(PC)
@@ -146,6 +147,9 @@
 	MOVQ	$bsdthread_start(SB), DI	// threadstart
 	MOVQ	$0, SI	// wqthread, not used by us
 	MOVQ	$0, DX	// pthsize, not used by us
+	MOVQ	$0, R10	// dummy_value [sic]
+	MOVQ	$0, R8	// targetconc_ptr
+	MOVQ	$0, R9	// dispatchqueue_offset
 	MOVQ	$(0x2000000+366), AX	// bsdthread_register
 	SYSCALL
 	JCC 2(PC)