From 008cc907de327d83a0be609cd495fccb0e5dfa4c Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Mon, 17 Mar 2014 23:22:12 +0100 Subject: [PATCH] x86, vdso32: Disable stack protector, adjust optimizations For the 32-bit VDSO, match the 64-bit VDSO in: 1. Disable the stack protector. 2. Use -fno-omit-frame-pointer for user space debugging sanity. 3. Use -foptimize-sibling-calls like the 64-bit VDSO does. Reported-by: Ingo Molnar Signed-off-by: Stefani Seibold Link: http://lkml.kernel.org/r/1395094933-14252-13-git-send-email-stefani@seibold.net Signed-off-by: H. Peter Anvin --- arch/x86/vdso/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index 6cef7a1b014c..a2de5fc15511 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -151,6 +151,9 @@ KBUILD_CFLAGS_32 := $(filter-out -mcmodel=kernel,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 := $(filter-out -mfentry,$(KBUILD_CFLAGS_32)) KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic +KBUILD_CFLAGS_32 += $(call cc-option, -fno-stack-protector) +KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) +KBUILD_CFLAGS_32 += -fno-omit-frame-pointer $(vdso32-images:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) $(vdso32-images:%=$(obj)/%.dbg): $(obj)/vdso32-%.so.dbg: FORCE \ -- GitLab