diff options
Diffstat (limited to 'kernel/arch/x86/vdso/Makefile')
| -rw-r--r-- | kernel/arch/x86/vdso/Makefile | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/kernel/arch/x86/vdso/Makefile b/kernel/arch/x86/vdso/Makefile deleted file mode 100644 index e97032069..000000000 --- a/kernel/arch/x86/vdso/Makefile +++ /dev/null @@ -1,209 +0,0 @@ -# -# Building vDSO images for x86. -# - -KBUILD_CFLAGS += $(DISABLE_LTO) -KASAN_SANITIZE := n - -VDSO64-$(CONFIG_X86_64) := y -VDSOX32-$(CONFIG_X86_X32_ABI) := y -VDSO32-$(CONFIG_X86_32) := y -VDSO32-$(CONFIG_COMPAT) := y - -# files to link into the vdso -vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o - -# files to link into kernel -obj-y += vma.o - -# vDSO images to build -vdso_img-$(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 := $(foreach F,$(vobjs-y),$(obj)/$F) - -$(obj)/vdso.o: $(obj)/vdso.so - -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) \ - $(vdso_img-y:%=$(obj)/vdso%.so) - -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 \ - $(DISABLE_LTO) - -$(obj)/vdso64.so.dbg: $(src)/vdso.lds $(vobjs) FORCE - $(call if_changed,vdso) - -HOST_EXTRACFLAGS += -I$(srctree)/tools/include -I$(srctree)/include/uapi -I$(srctree)/arch/x86/include/uapi -hostprogs-y += vdso2c - -quiet_cmd_vdso2c = VDSO2C $@ -define cmd_vdso2c - $(obj)/vdso2c $< $(<:%.dbg=%) $@ -endef - -$(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(obj)/vdso%.so $(obj)/vdso2c FORCE - $(call if_changed,vdso2c) - -# -# Don't omit frame pointers for ease of userspace debugging, but do -# optimize sibling calls. -# -CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \ - $(filter -g%,$(KBUILD_CFLAGS)) $(call cc-option, -fno-stack-protector) \ - -fno-omit-frame-pointer -foptimize-sibling-calls \ - -DDISABLE_BRANCH_PROFILING - -$(vobjs): KBUILD_CFLAGS += $(CFL) - -# -# vDSO code runs in userspace and -pg doesn't help with profiling anyway. -# -CFLAGS_REMOVE_vdso-note.o = -pg -CFLAGS_REMOVE_vclock_gettime.o = -pg -CFLAGS_REMOVE_vgetcpu.o = -pg -CFLAGS_REMOVE_vvar.o = -pg - -# -# X32 processes use x32 vDSO to access 64bit kernel data. -# -# Build x32 vDSO image: -# 1. Compile x32 vDSO as 64bit. -# 2. Convert object files to x32. -# 3. Build x32 VDSO image with x32 objects, which contains 64bit codes -# so that it can reach 64bit address space with 64bit pointers. -# - -CPPFLAGS_vdsox32.lds = $(CPPFLAGS_vdso.lds) -VDSO_LDFLAGS_vdsox32.lds = -Wl,-m,elf32_x86_64 \ - -Wl,-soname=linux-vdso.so.1 \ - -Wl,-z,max-page-size=4096 \ - -Wl,-z,common-page-size=4096 - -# 64-bit objects to re-brand as x32 -vobjs64-for-x32 := $(filter-out $(vobjs-nox32),$(vobjs-y)) - -# x32-rebranded versions -vobjx32s-y := $(vobjs64-for-x32:.o=-x32.o) - -# same thing, but in the output directory -vobjx32s := $(foreach F,$(vobjx32s-y),$(obj)/$F) - -# Convert 64bit object file to x32 for x32 vDSO. -quiet_cmd_x32 = X32 $@ - cmd_x32 = $(OBJCOPY) -O elf32-x86-64 $< $@ - -$(obj)/%-x32.o: $(obj)/%.o FORCE - $(call if_changed,x32) - -targets += vdsox32.lds $(vobjx32s-y) - -$(obj)/%.so: OBJCOPYFLAGS := -S -$(obj)/%.so: $(obj)/%.so.dbg - $(call if_changed,objcopy) - -$(obj)/vdsox32.so.dbg: $(src)/vdsox32.lds $(vobjx32s) FORCE - $(call if_changed,vdso) - -# -# Build multiple 32-bit vDSO images to choose from at boot time. -# -vdso32.so-$(VDSO32-y) += int80 -vdso32.so-$(CONFIG_COMPAT) += syscall -vdso32.so-$(VDSO32-y) += sysenter - -vdso32-images = $(vdso32.so-y:%=vdso32-%.so) - -CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds) -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. -override obj-dirs = $(dir $(obj)) $(obj)/vdso32/ - -targets += vdso32/vdso32.lds -targets += vdso32/note.o vdso32/vclock_gettime.o $(vdso32.so-y:%=vdso32/%.o) -targets += vdso32/vclock_gettime.o - -$(obj)/vdso32.o: $(vdso32-images:%=$(obj)/%) - -KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -$(vdso32-images:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) -$(vdso32-images:%=$(obj)/%.dbg): asflags-$(CONFIG_X86_64) += -m32 - -KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) -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 += $(call cc-option, -foptimize-sibling-calls) -KBUILD_CFLAGS_32 += -fno-omit-frame-pointer -KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING -$(vdso32-images:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) - -$(vdso32-images:%=$(obj)/%.dbg): $(obj)/vdso32-%.so.dbg: FORCE \ - $(obj)/vdso32/vdso32.lds \ - $(obj)/vdso32/vclock_gettime.o \ - $(obj)/vdso32/note.o \ - $(obj)/vdso32/%.o - $(call if_changed,vdso) - -# -# The DSO images are built using a special linker script. -# -quiet_cmd_vdso = VDSO $@ - cmd_vdso = $(CC) -nostdlib -o $@ \ - $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ - -Wl,-T,$(filter %.lds,$^) $(filter %.o,$^) && \ - sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@' - -VDSO_LDFLAGS = -fPIC -shared $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \ - $(call cc-ldoption, -Wl$(comma)--build-id) -Wl,-Bsymbolic $(LTO_CFLAGS) -GCOV_PROFILE := n - -# -# Install the unstripped copies of vdso*.so. If our toolchain supports -# build-id, install .build-id links as well. -# -quiet_cmd_vdso_install = INSTALL $(@:install_%=%) -define cmd_vdso_install - cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \ - if readelf -n $< |grep -q 'Build ID'; then \ - buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ - first=`echo $$buildid | cut -b-2`; \ - last=`echo $$buildid | cut -b3-`; \ - mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ - ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ - fi -endef - -vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%) - -$(MODLIB)/vdso: FORCE - @mkdir -p $(MODLIB)/vdso - -$(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE - $(call cmd,vdso_install) - -PHONY += vdso_install $(vdso_img_insttargets) -vdso_install: $(vdso_img_insttargets) FORCE - -clean-files := vdso32-syscall* vdso32-sysenter* vdso32-int80* vdso64* vdso-image-*.c vdsox32.so* |