Commit 3bd2cbb9 authored Apr 21, 2011 by Nicolas Pitre Committed by Nicolas Pitre May 06, 2011

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

parent 0ce790e7

arch/arm/boot/compressed/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)/

arch/arm/boot/compressed/vmlinux.lds.in

+1 −0

Original line number	Diff line number	Diff line
		@@ -54,6 +54,7 @@ SECTIONS
		.bss : { *(.bss) }
		_end = .;

		. = ALIGN(8); /* the stack must be 64-bit aligned */
		.stack : { *(.stack) }

		.stab 0 : { *(.stab) }