x86, lto: Disable LTO for the x86 VDSO
The VDSO does not play well with LTO, so just disable LTO for it. Also pass a 32bit linker flag for the 32bit version. [ hpa: change braces to parens to match kernel Makefile style ] Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1391846481-31491-1-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
parent
634676c203
commit
67424d5a22
|
@ -2,6 +2,8 @@
|
|||
# Building vDSO images for x86.
|
||||
#
|
||||
|
||||
KBUILD_CFLAGS += $(DISABLE_LTO)
|
||||
|
||||
VDSO64-$(CONFIG_X86_64) := y
|
||||
VDSOX32-$(CONFIG_X86_X32_ABI) := y
|
||||
VDSO32-$(CONFIG_X86_32) := y
|
||||
|
@ -35,7 +37,8 @@ export CPPFLAGS_vdso.lds += -P -C
|
|||
|
||||
VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
|
||||
-Wl,--no-undefined \
|
||||
-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
|
||||
-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096 \
|
||||
$(DISABLE_LTO)
|
||||
|
||||
$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
|
||||
|
||||
|
@ -127,7 +130,7 @@ vdso32.so-$(VDSO32-y) += sysenter
|
|||
vdso32-images = $(vdso32.so-y:%=vdso32-%.so)
|
||||
|
||||
CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
|
||||
VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-soname=linux-gate.so.1
|
||||
VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf_i386 -Wl,-soname=linux-gate.so.1
|
||||
|
||||
# This makes sure the $(obj) subdirectory exists even though vdso32/
|
||||
# is not a kbuild sub-make subdirectory.
|
||||
|
@ -181,7 +184,8 @@ quiet_cmd_vdso = VDSO $@
|
|||
-Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \
|
||||
sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
|
||||
|
||||
VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
|
||||
VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
|
||||
$(LTO_CFLAGS)
|
||||
GCOV_PROFILE := n
|
||||
|
||||
#
|
||||
|
|
Loading…
Reference in New Issue