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Message-Id: <1234277507-4987-4-git-send-email-brgerst@gmail.com> Date: Tue, 10 Feb 2009 09:51:47 -0500 From: Brian Gerst <brgerst@...il.com> To: Tejun Heo <tj@...nel.org> Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org Subject: [PATCH 3/3] x86: Drop -fno-stack-protector after pt_regs fixes Now that no functions rely on struct pt_regs being passed by value, stack protector can be enabled. Signed-off-by: Brian Gerst <brgerst@...il.com> --- arch/x86/kernel/Makefile | 18 ------------------ 1 files changed, 0 insertions(+), 18 deletions(-) diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index b1f8be3..37fa30b 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -24,24 +24,6 @@ CFLAGS_vsyscall_64.o := $(PROFILING) -g0 $(nostackp) CFLAGS_hpet.o := $(nostackp) CFLAGS_tsc.o := $(nostackp) CFLAGS_paravirt.o := $(nostackp) -# -# On x86_32, register frame is passed verbatim on stack as struct -# pt_regs. gcc considers the parameter to belong to the callee and -# with -fstack-protector it copies pt_regs to the callee's stack frame -# to put the structure after the stack canary causing changes made by -# the exception handlers to be lost. Turn off stack protector for all -# files containing functions which take struct pt_regs from register -# frame. -# -# The proper way to fix this is to teach gcc that the argument belongs -# to the caller for these functions, oh well... -# -ifdef CONFIG_X86_32 -CFLAGS_process_32.o := $(nostackp) -CFLAGS_vm86_32.o := $(nostackp) -CFLAGS_signal.o := $(nostackp) -CFLAGS_traps.o := $(nostackp) -endif obj-y := process_$(BITS).o signal.o entry_$(BITS).o obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o -- 1.6.1 -- 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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