lkml.org 
[lkml]   [2011]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Disable -fconserve-stack on ARM
On Sat, May 28, 2011 at 04:34:17PM +0100, Andi Kleen wrote:
> Disable -fconserve-stack on ARM
>
> There are reports that -fconserve-stack misaligns variables on the stack.
> Disable it for ARM to work around this gcc bug.
>
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
>
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 25750bc..0883cff 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -41,6 +41,10 @@ ifeq ($(CONFIG_CC_STACKPROTECTOR),y)
> KBUILD_CFLAGS +=-fstack-protector
> endif
>
> +# ARM gcc developers unfortunately broke -fconserve-stack. It misaligns
> +# variables on the stack
> +KBUILD_CFLAGS += $(call cc-option,-fno-conserve-stack)

Didn't work, on the gcc command line we get -fno-conserve-stack followed
by -fconserve-stack from the top makefile and it seems that the latter
takes priority.

--
Catalin



\
 
 \ /
  Last update: 2011-05-31 18:33    [W:0.086 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site