runtime: fix invalid pointer in windows/arm64 badsignal2

billziss-gh · billziss-gh · commit 23dbdb53782b · 2022-10-12T03:34:43.000-07:00
diff --git a/src/runtime/sys_windows_arm64.s b/src/runtime/sys_windows_arm64.s
@@ -113,6 +113,7 @@ TEXT runtime·badsignal2(SB),NOSPLIT,$16-0
 	MOVD	$runtime·badsignalmsg(SB), R1	// lpBuffer
 	MOVD	$runtime·badsignallen(SB), R2	// lpNumberOfBytesToWrite
 	MOVD	(R2), R2
+	// point R3 to stack local that will receive number of bytes written
 	ADD	$16, RSP, R3		// lpNumberOfBytesWritten
 	MOVD	$0, R4			// lpOverlapped
 	MOVD	runtime·_WriteFile(SB), R12
