From dff71b369adec91f3911cee5596ae0d7bbaf6b71 Mon Sep 17 00:00:00 2001
From: Dale Rahn <drahn@cvs.openbsd.org>
Date: Tue, 9 May 2006 22:52:14 +0000
Subject: The int (32bit) argument must be sign extended on the 64 bit amd64
 before the add. ok miod@, toby@. olrite mickey@

---
 lib/libc/arch/amd64/sys/sbrk.S | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'lib/libc/arch/amd64/sys/sbrk.S')

diff --git a/lib/libc/arch/amd64/sys/sbrk.S b/lib/libc/arch/amd64/sys/sbrk.S
index 677068c4978..98fceaf9e0a 100644
--- a/lib/libc/arch/amd64/sys/sbrk.S
+++ b/lib/libc/arch/amd64/sys/sbrk.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sbrk.S,v 1.2 2004/02/10 00:22:51 drahn Exp $	*/
+/*	$OpenBSD: sbrk.S,v 1.3 2006/05/09 22:52:13 drahn Exp $	*/
 /*	$NetBSD: sbrk.S,v 1.1 2001/06/19 00:25:06 fvdl Exp $	*/
 
 /*-
@@ -57,7 +57,8 @@ __curbrk:	.quad	_end
 SYSENTRY(_sbrk)
 #ifdef PIC
 	movq	PIC_GOT(__curbrk),%rdx
-	movq	(%rdx),%rax
+	movslq  %edi, %rax
+	movq	(%rdx),%rdi
 	addq	%rax,%rdi
 	SYSTRAP(break)
 	jc	err
@@ -70,7 +71,8 @@ err:
 	jmp	*%rdx
 #else
 	movq	__curbrk(%rip),%rax
-	movq	%rdi,%rsi
+	movslq	%edi,%rsi
+	movq	%rsi,%rdi
 	addq	%rax,%rdi
 	SYSTRAP(break)
 	jc	err
-- 
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