From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Wed, 7 Feb 2018 01:19:06 +0000 (+0100)
Subject: linux/x86_64/get_error.c: do not sign-extend if no error happened
X-Git-Tag: v4.21~47
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8e4b24701a944570e2af6dfc247a060be1da1b11;p=strace

linux/x86_64/get_error.c: do not sign-extend if no error happened
---

diff --git a/linux/x86_64/get_error.c b/linux/x86_64/get_error.c
index 440fdc74..ac47ab58 100644
--- a/linux/x86_64/get_error.c
+++ b/linux/x86_64/get_error.c
@@ -20,6 +20,9 @@ get_error(struct tcb *tcp, const bool check_errno)
 		tcp->u_rval = -1;
 		tcp->u_error = -rax;
 	} else {
-		tcp->u_rval = rax;
+		if (x86_io.iov_len == sizeof(i386_regs))
+			tcp->u_rval = (uint32_t) rax;
+		else
+			tcp->u_rval = rax;
 	}
 }