[src/trunk]: src/lib/libc/arch/arm/gen Ensure stack alignment. "looks fine" m...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b19a3f421eb1
branches:  trunk
changeset: 780752:b19a3f421eb1
user:      skrll <skrll%NetBSD.org@localhost>
date:      Sun Aug 05 05:10:38 2012 +0000

description:
Ensure stack alignment. "looks fine" matt@

diffstat:

 lib/libc/arch/arm/gen/swapcontext.S |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r 3ca28d839735 -r b19a3f421eb1 lib/libc/arch/arm/gen/swapcontext.S
--- a/lib/libc/arch/arm/gen/swapcontext.S       Sun Aug 05 04:54:38 2012 +0000
+++ b/lib/libc/arch/arm/gen/swapcontext.S       Sun Aug 05 05:10:38 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: swapcontext.S,v 1.5 2008/04/28 20:22:55 martin Exp $   */
+/*     $NetBSD: swapcontext.S,v 1.6 2012/08/05 05:10:38 skrll Exp $    */
 
 /*-
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -32,13 +32,15 @@
 #include "SYS.h"
 
 #if defined(LIBC_SCCS) && !defined(lint)
-        RCSID("$NetBSD: swapcontext.S,v 1.5 2008/04/28 20:22:55 martin Exp $")
+        RCSID("$NetBSD: swapcontext.S,v 1.6 2012/08/05 05:10:38 skrll Exp $")
 #endif /* LIBC_SCCS && !lint */
 
 ENTRY(swapcontext)
        stmfd   sp!, {r0-r1, lr}        /* Must save oucp, ucp, lr. */
+       sub     sp, #4
        bl      PIC_SYM(_C_LABEL(_getcontext), PLT)  /* getcontext(oucp) */
        cmp     r0, #0
+       add     sp, #4
        ldmfd   sp!, {r0-r1, lr}
        RETc(ne)
        str     lr, [r0, #(36 + 15*4)]  /* Adjust saved PC. */