This is a note to let you know that I've just added the patch titled
ARM: zImage: make sure the stack is 64-bit aligned
to the 2.6.38-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-zimage-make-sure-the-stack-is-64-bit-aligned.patch
and it can be found in the queue-2.6.38 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3bd2cbb95543acf44fe123eb9f038de54e655eb4 Mon Sep 17 00:00:00 2001
From: Nicolas Pitre <[email protected]>
Date: Thu, 21 Apr 2011 21:45:08 -0400
Subject: ARM: zImage: make sure the stack is 64-bit aligned
From: Nicolas Pitre <[email protected]>
commit 3bd2cbb95543acf44fe123eb9f038de54e655eb4 upstream.
With ARMv5+ and EABI, the compiler expects a 64-bit aligned stack so
instructions like STRD and LDRD can be used. Without this, mysterious
boot failures were seen semi randomly with the LZMA decompressor.
While at it, let's align .bss as well.
Signed-off-by: Nicolas Pitre <[email protected]>
Tested-by: Shawn Guo <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/boot/compressed/Makefile | 2 +-
arch/arm/boot/compressed/vmlinux.lds.in | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -59,7 +59,7 @@ ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT)
ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS)
else
ZTEXTADDR := 0
-ZBSSADDR := ALIGN(4)
+ZBSSADDR := ALIGN(8)
endif
SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
--- a/arch/arm/boot/compressed/vmlinux.lds.in
+++ b/arch/arm/boot/compressed/vmlinux.lds.in
@@ -57,6 +57,7 @@ SECTIONS
.bss : { *(.bss) }
_end = .;
+ . = ALIGN(8); /* the stack must be 64-bit aligned */
.stack : { *(.stack) }
.stab 0 : { *(.stab) }
Patches currently in stable-queue which might be from [email protected]
are
queue-2.6.38/arm-zimage-make-sure-the-stack-is-64-bit-aligned.patch
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