[PATCH] ARM: Fix relocation if image end past uncompressed kernel end

[Shawn Guo]

On Fri, Apr 22, 2011 at 01:19:14PM +0800, Shawn Guo wrote:
> > ----- >8
> > 
> > From: Nicolas Pitre <nicolas.pitre at linaro.org>
> > 
> > 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 at linaro.org>
> > 
> > diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
> > index 58ac434..79b5c62 100644
> > --- a/arch/arm/boot/compressed/Makefile
> > +++ b/arch/arm/boot/compressed/Makefile
> > @@ -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)/
> > diff --git a/arch/arm/boot/compressed/vmlinux.lds.in b/arch/arm/boot/compressed/vmlinux.lds.in
> > index 5309909..ea80abe 100644
> > --- a/arch/arm/boot/compressed/vmlinux.lds.in
> > +++ b/arch/arm/boot/compressed/vmlinux.lds.in
> > @@ -54,6 +54,7 @@ SECTIONS
> >    .bss			: { *(.bss) }
> >    _end = .;
> >  
> > +  . = ALIGN(8);		/* the stack must be 64-bit aligned */
> >    .stack		: { *(.stack) }
> >  
> >    .stab 0		: { *(.stab) }
> > 
> So this is the [PATCH 1/3] in the same set with following two?
> 
> [PATCH 2/3] ARM: zImage: don't ignore error returned from decompress()
> [PATCH 3/3] ARM: zImage: the page table memory must be considered before relocation
> 
On mx51 babbage,

Tested-by: Shawn Guo <shawn.guo at linaro.org>

which is only a regression test.

-- 
Regards,
Shawn