[PATCH] Disable -fconserve-stack on ARM
From: catalin.marinas@arm.com (Catalin Marinas)
Date: 2011-05-31 16:30:42
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On Sat, May 28, 2011 at 04:34:17PM +0100, Andi Kleen wrote:
quoted hunk ↗ jump to hunk
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 <redacted>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