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xen-devel
[Xen-devel] [PATCH] xen: Disable stack protector for irq helper
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To: |
Ingo Molnar <mingo@xxxxxxxxxx> |
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Subject: |
[Xen-devel] [PATCH] xen: Disable stack protector for irq helper |
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From: |
Bastian Blank <bastian@xxxxxxxxxxxx> |
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Date: |
Sun, 4 Oct 2009 20:30:13 +0200 |
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Cc: |
Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Stable Kernel <stable@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx> |
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Sun, 04 Oct 2009 11:30:08 -0700 |
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www-data@xxxxxxxxxxxxxxxxxxx |
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Bastian Blank <bastian@xxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Stable Kernel <stable@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Mutt/1.5.18 (2008-05-17) |
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@xxxxxxxxxx>
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.
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