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ARM: zImage: make sure the stack is 64-bit aligned 

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 <nicolas.pitre@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Tony Lindgren <tony@atomide.com>
CC: stable@kernel.org
This commit is contained in:
Nicolas Pitre 2011-04-21 21:45:08 -04:00 committed by Nicolas Pitre
parent 0ce790e7d7
commit 3bd2cbb955
2 changed files with 2 additions and 1 deletions
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2
arch/arm/boot/compressed/Makefile
View File

@ -74,7 +74,7 @@ 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)/

1
arch/arm/boot/compressed/vmlinux.lds.in
View File

@ -54,6 +54,7 @@ SECTIONS
.bss : { *(.bss) }
_end = .;
. = ALIGN(8); /* the stack must be 64-bit aligned */
.stack : { *(.stack) }
.stab 0 : { *(.stab) }