diff options
Diffstat (limited to 'arch/x86/vdso/Makefile')
| -rw-r--r-- | arch/x86/vdso/Makefile | 90 |
1 files changed, 32 insertions, 58 deletions
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index c580d1210ffe..895d4b16b7e3 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -24,15 +24,30 @@ vobj64s := $(filter-out $(vobjx32s-compat),$(vobjs-y)) # files to link into kernel obj-y += vma.o -obj-$(VDSO64-y) += vdso.o -obj-$(VDSOX32-y) += vdsox32.o -obj-$(VDSO32-y) += vdso32.o vdso32-setup.o + +# vDSO images to build +vdso_img-$(VDSO64-y) += 64 +vdso_img-$(VDSOX32-y) += x32 +vdso_img-$(VDSO32-y) += 32-int80 +vdso_img-$(CONFIG_COMPAT) += 32-syscall +vdso_img-$(VDSO32-y) += 32-sysenter + +obj-$(VDSO32-y) += vdso32-setup.o vobjs := $(foreach F,$(vobj64s),$(obj)/$F) $(obj)/vdso.o: $(obj)/vdso.so -targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y) +targets += vdso.lds $(vobjs-y) + +# Build the vDSO image C files and link them in. +vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o) +vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c) +vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg) +obj-y += $(vdso_img_objs) +targets += $(vdso_img_cfiles) +targets += $(vdso_img_sodbg) +.SECONDARY: $(vdso_img-y:%=$(obj)/vdso-image-%.c) export CPPFLAGS_vdso.lds += -P -C @@ -41,14 +56,18 @@ VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \ -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096 \ $(DISABLE_LTO) -$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so - -$(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE +$(obj)/vdso64.so.dbg: $(src)/vdso.lds $(vobjs) FORCE $(call if_changed,vdso) -$(obj)/%.so: OBJCOPYFLAGS := -S -$(obj)/%.so: $(obj)/%.so.dbg FORCE - $(call if_changed,objcopy) +hostprogs-y += vdso2c + +quiet_cmd_vdso2c = VDSO2C $@ +define cmd_vdso2c + $(obj)/vdso2c $< $@ +endef + +$(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso2c FORCE + $(call if_changed,vdso2c) # # Don't omit frame pointers for ease of userspace debugging, but do @@ -68,22 +87,6 @@ CFLAGS_REMOVE_vclock_gettime.o = -pg CFLAGS_REMOVE_vgetcpu.o = -pg CFLAGS_REMOVE_vvar.o = -pg -targets += vdso-syms.lds -obj-$(VDSO64-y) += vdso-syms.lds - -# -# Match symbols in the DSO that look like VDSO*; produce a file of constants. -# -sed-vdsosym := -e 's/^00*/0/' \ - -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p' -quiet_cmd_vdsosym = VDSOSYM $@ -define cmd_vdsosym - $(NM) $< | LC_ALL=C sed -n $(sed-vdsosym) | LC_ALL=C sort > $@ -endef - -$(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE - $(call if_changed,vdsosym) - # # X32 processes use x32 vDSO to access 64bit kernel data. # @@ -94,9 +97,6 @@ $(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE # so that it can reach 64bit address space with 64bit pointers. # -targets += vdsox32-syms.lds -obj-$(VDSOX32-y) += vdsox32-syms.lds - CPPFLAGS_vdsox32.lds = $(CPPFLAGS_vdso.lds) VDSO_LDFLAGS_vdsox32.lds = -Wl,-m,elf32_x86_64 \ -Wl,-soname=linux-vdso.so.1 \ @@ -113,9 +113,7 @@ quiet_cmd_x32 = X32 $@ $(obj)/%-x32.o: $(obj)/%.o FORCE $(call if_changed,x32) -targets += vdsox32.so vdsox32.so.dbg vdsox32.lds $(vobjx32s-y) - -$(obj)/vdsox32.o: $(src)/vdsox32.S $(obj)/vdsox32.so +targets += vdsox32.lds $(vobjx32s-y) $(obj)/vdsox32.so.dbg: $(src)/vdsox32.lds $(vobjx32s) FORCE $(call if_changed,vdso) @@ -123,7 +121,6 @@ $(obj)/vdsox32.so.dbg: $(src)/vdsox32.lds $(vobjx32s) FORCE # # Build multiple 32-bit vDSO images to choose from at boot time. # -obj-$(VDSO32-y) += vdso32-syms.lds vdso32.so-$(VDSO32-y) += int80 vdso32.so-$(CONFIG_COMPAT) += syscall vdso32.so-$(VDSO32-y) += sysenter @@ -138,10 +135,8 @@ VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-m,elf_i386 -Wl,-soname=linux-gate.so.1 override obj-dirs = $(dir $(obj)) $(obj)/vdso32/ targets += vdso32/vdso32.lds -targets += $(vdso32-images) $(vdso32-images:=.dbg) targets += vdso32/note.o vdso32/vclock_gettime.o $(vdso32.so-y:%=vdso32/%.o) - -extra-y += $(vdso32-images) +targets += vdso32/vclock_gettime.o $(obj)/vdso32.o: $(vdso32-images:%=$(obj)/%) @@ -166,27 +161,6 @@ $(vdso32-images:%=$(obj)/%.dbg): $(obj)/vdso32-%.so.dbg: FORCE \ $(obj)/vdso32/%.o $(call if_changed,vdso) -# Make vdso32-*-syms.lds from each image, and then make sure they match. -# The only difference should be that some do not define VDSO32_SYSENTER_RETURN. - -targets += vdso32-syms.lds $(vdso32.so-y:%=vdso32-%-syms.lds) - -quiet_cmd_vdso32sym = VDSOSYM $@ -define cmd_vdso32sym - if LC_ALL=C sort -u $(filter-out FORCE,$^) > $(@D)/.tmp_$(@F) && \ - $(foreach H,$(filter-out FORCE,$^),\ - if grep -q VDSO32_SYSENTER_RETURN $H; \ - then diff -u $(@D)/.tmp_$(@F) $H; \ - else sed /VDSO32_SYSENTER_RETURN/d $(@D)/.tmp_$(@F) | \ - diff -u - $H; fi &&) : ;\ - then mv -f $(@D)/.tmp_$(@F) $@; \ - else rm -f $(@D)/.tmp_$(@F); exit 1; \ - fi -endef - -$(obj)/vdso32-syms.lds: $(vdso32.so-y:%=$(obj)/vdso32-%-syms.lds) FORCE - $(call if_changed,vdso32sym) - # # The DSO images are built using a special linker script. # @@ -197,7 +171,7 @@ quiet_cmd_vdso = VDSO $@ sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@' VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \ - $(LTO_CFLAGS) + -Wl,-Bsymbolic $(LTO_CFLAGS) GCOV_PROFILE := n # |