From: Ben Pfaff <blp@cs.stanford.edu>
Date: Sun, 19 Sep 2004 07:07:19 +0000 (+0000)
Subject: Syscall handler doesn't expect to see return address on stack,
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63d1fcb70a9a277c64b7096336c887dafc903774;hp=b1a18e3872d52fcfe598b1e0e0d6698408960ce4;p=pintos-anon

Syscall handler doesn't expect to see return address on stack,
so pop it off before invoking interrupt.
---

diff --git a/src/lib/user/syscall-stub.S b/src/lib/user/syscall-stub.S
index 27e6b20..e71afd5 100644
--- a/src/lib/user/syscall-stub.S
+++ b/src/lib/user/syscall-stub.S
@@ -1,4 +1,5 @@
 .globl syscall
 syscall:
+	popl %ecx
 	int $0x30
-	retl
+	jmpl *%ecx