linux-kernel - [PATCH 3.10 ~ 3.14] efi: fix the efi 32bit boot failed problem

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Message-ID: <1438078879-24705-1-git-send-email-fupan.li@windriver.com>
Date:	Tue, 28 Jul 2015 18:21:19 +0800
From:	<fupan.li@...driver.com>
To:	<matt@...sole-pimps.org>, <stable@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>, <fupanli@...il.com>
Subject: [PATCH 3.10 ~ 3.14] efi: fix the efi 32bit boot failed problem

From: fli <fupan.li@...driver.com>

The commit 35d5134b7d5a55e269c953096224248b9f6f72c2
Author: Matt Fleming <matt@...sole-pimps.org>
Date:   Tue Apr 8 13:14:00 2014 +0100

    x86/efi: Correct EFI boot stub use of code32_start

imported a bug, which should use the label's address instead
of the value stored in the label's address to caculate the
code32_start address.

Signed-off-by: fli <fupan.li@...driver.com>
---
 arch/x86/boot/compressed/head_32.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index abb988a..3b28eff 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -54,7 +54,7 @@ ENTRY(efi_pe_entry)
 	call	reloc
 reloc:
 	popl	%ecx
-	subl	reloc, %ecx
+	subl	$reloc, %ecx
 	movl	%ecx, BP_code32_start(%eax)
 
 	sub	$0x4, %esp
-- 
1.9.1

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