File grub2-fix-x86_64-efi-startup-stack-alignment.patch of Package grub2.openSUSE_13.1_Update

From 7960d3e1823bd3ea569109dcfe269447c3589fac Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Tue, 19 Nov 2013 14:31:40 +0100
Subject: * grub-core/kern/x86_64/efi/startup.S (_start): Align the
 stack to a 16-byte boundary, as required by the x86-64 ABI, before calling
 grub_main. In some cases, GCC emits code that assumes this alignment, which
 crashes if not aligned. The EFI firmware is also entitled to assume that
 stack alignment without checking.

References: bnc#841426
Patch-Mainline: yes

Signed-off-by: Gary Ching-Pang Lin <glin@suse.com>
---
 grub-core/kern/x86_64/efi/startup.S | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/grub-core/kern/x86_64/efi/startup.S b/grub-core/kern/x86_64/efi/startup.S
index f86f019..9357e5c 100644
--- a/grub-core/kern/x86_64/efi/startup.S
+++ b/grub-core/kern/x86_64/efi/startup.S
@@ -30,6 +30,6 @@ _start:
 	movq	%rcx, EXT_C(grub_efi_image_handle)(%rip)
 	movq	%rdx, EXT_C(grub_efi_system_table)(%rip)
 
+	andq	$~0xf, %rsp
 	call	EXT_C(grub_main)
-	ret
-
+	/* Doesn't return.  */
-- 
1.8.1.4