From 1cfa405d0a272cbd7df22d4b9767eb57e21cc21f Mon Sep 17 00:00:00 2001
From: aiju <devnull@localhost>
Date: Mon, 12 Jun 2017 17:09:11 +0000
Subject: pc64: set error code and trap fields in Ureg* on syscalls

---
 sys/src/9/pc64/l.s | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/src/9/pc64/l.s b/sys/src/9/pc64/l.s
index 669ee2167..cb3cb343e 100644
--- a/sys/src/9/pc64/l.s
+++ b/sys/src/9/pc64/l.s
@@ -722,8 +722,10 @@ TEXT syscallentry(SB), 1, $-4
 	PUSHQ	R11				/* old flags */
 	PUSHQ	$UESEL				/* old code segment */
 	PUSHQ	CX				/* old ip */
+	PUSHQ	$0				/* error code */
+	PUSHQ	$64				/* trap number (VectorSYSCALL) */
 
-	SUBQ	$(8 + 23*8-5*8), SP		/* arg + sizeof(Ureg)-pushed */
+	SUBQ	$(8 + 23*8-7*8), SP		/* arg + sizeof(Ureg)-pushed */
 
 	MOVQ	RMACH, (15*8)(SP)		/* old r15 */
 	MOVQ	RUSER, (14*8)(SP)		/* old r14 */
-- 
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