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Message-ID: <20091004183013.GA26101@wavehammer.waldi.eu.org> Date: Sun, 4 Oct 2009 20:30:13 +0200 From: Bastian Blank <bastian@...di.eu.org> To: Ingo Molnar <mingo@...hat.com> Cc: Jeremy Fitzhardinge <jeremy@...p.org>, the arch/x86 maintainers <x86@...nel.org>, Stable Kernel <stable@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Xen-devel <xen-devel@...ts.xensource.com> Subject: [PATCH] xen: Disable stack protector for irq helper The stack protector needs additional registers on x86_32, which are not saved in calls to the small paravirt interrupt handlers. This leads to early crashes as registers are overwritten and not saved by the caller as instructed. Signed-off-by: Bastian Blank <waldi@...ian.org> diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile index 3bb4fc2..ac19398 100644 --- a/arch/x86/xen/Makefile +++ b/arch/x86/xen/Makefile @@ -5,9 +5,9 @@ CFLAGS_REMOVE_irq.o = -pg endif -# Make sure early boot has no stackprotector nostackp := $(call cc-option, -fno-stack-protector) CFLAGS_enlighten.o := $(nostackp) +CFLAGS_irq.o := $(nostackp) CFLAGS_mmu.o := $(nostackp) obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \ -- Mind your own business, Spock. I'm sick of your halfbreed interference. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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