diff options
Diffstat (limited to 'arch/x86/entry/vdso/Makefile')
| -rw-r--r-- | arch/x86/entry/vdso/Makefile | 162 |
1 files changed, 6 insertions, 156 deletions
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile index f247f5f5cb44..987b43fd4cd3 100644 --- a/arch/x86/entry/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile @@ -3,160 +3,10 @@ # Building vDSO images for x86. # -# Include the generic Makefile to check the built vDSO: -include $(srctree)/lib/vdso/Makefile.include +# Regular kernel objects +obj-y := vma.o extable.o +obj-$(CONFIG_COMPAT_32) += vdso32-setup.o -# Files to link into the vDSO: -vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o vgetrandom.o vgetrandom-chacha.o -vobjs32-y := vdso32/note.o vdso32/system_call.o vdso32/sigreturn.o -vobjs32-y += vdso32/vclock_gettime.o vdso32/vgetcpu.o -vobjs-$(CONFIG_X86_SGX) += vsgx.o - -# Files to link into the kernel: -obj-y += vma.o extable.o - -# vDSO images to build: -obj-$(CONFIG_X86_64) += vdso-image-64.o -obj-$(CONFIG_X86_X32_ABI) += vdso-image-x32.o -obj-$(CONFIG_COMPAT_32) += vdso-image-32.o vdso32-setup.o - -vobjs := $(addprefix $(obj)/, $(vobjs-y)) -vobjs32 := $(addprefix $(obj)/, $(vobjs32-y)) - -$(obj)/vdso.o: $(obj)/vdso.so - -targets += vdso.lds $(vobjs-y) -targets += vdso32/vdso32.lds $(vobjs32-y) - -targets += $(foreach x, 64 x32 32, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg) - -CPPFLAGS_vdso.lds += -P -C - -VDSO_LDFLAGS_vdso.lds = -m elf_x86_64 -soname linux-vdso.so.1 \ - -z max-page-size=4096 - -$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE - $(call if_changed,vdso_and_check) - -HOST_EXTRACFLAGS += -I$(srctree)/tools/include -I$(srctree)/include/uapi -I$(srctree)/arch/$(SUBARCH)/include/uapi -hostprogs += vdso2c - -quiet_cmd_vdso2c = VDSO2C $@ - cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@ - -$(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)) -fno-stack-protector \ - -fno-omit-frame-pointer -foptimize-sibling-calls \ - -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO - -ifdef CONFIG_MITIGATION_RETPOLINE -ifneq ($(RETPOLINE_VDSO_CFLAGS),) - CFL += $(RETPOLINE_VDSO_CFLAGS) -endif -endif - -$(vobjs): KBUILD_CFLAGS := $(filter-out $(PADDING_CFLAGS) $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) $(RANDSTRUCT_CFLAGS) $(KSTACK_ERASE_CFLAGS) $(GCC_PLUGINS_CFLAGS) $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS)) $(CFL) -$(vobjs): KBUILD_AFLAGS += -DBUILD_VDSO - -# -# vDSO code runs in userspace and -pg doesn't help with profiling anyway. -# -CFLAGS_REMOVE_vclock_gettime.o = -pg -CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg -CFLAGS_REMOVE_vgetcpu.o = -pg -CFLAGS_REMOVE_vdso32/vgetcpu.o = -pg -CFLAGS_REMOVE_vsgx.o = -pg -CFLAGS_REMOVE_vgetrandom.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 = -m elf32_x86_64 -soname linux-vdso.so.1 \ - -z max-page-size=4096 - -# x32-rebranded versions -vobjx32s-y := $(vobjs-y:.o=-x32.o) - -# same thing, but in the output directory -vobjx32s := $(addprefix $(obj)/, $(vobjx32s-y)) - -# 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 --remove-section __ex_table -$(obj)/%.so: $(obj)/%.so.dbg FORCE - $(call if_changed,objcopy) - -$(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE - $(call if_changed,vdso_and_check) - -CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.lds) -VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -soname linux-gate.so.1 - -KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -DBUILD_VDSO -$(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) -$(obj)/vdso32.so.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 := $(filter-out $(RANDSTRUCT_CFLAGS),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(KSTACK_ERASE_CFLAGS),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(RETPOLINE_CFLAGS),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(CC_FLAGS_CFI),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 := $(filter-out $(PADDING_CFLAGS),$(KBUILD_CFLAGS_32)) -KBUILD_CFLAGS_32 += -m32 -msoft-float -mregparm=0 -fpic -KBUILD_CFLAGS_32 += -fno-stack-protector -KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls) -KBUILD_CFLAGS_32 += -fno-omit-frame-pointer -KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING -KBUILD_CFLAGS_32 += -DBUILD_VDSO - -ifdef CONFIG_MITIGATION_RETPOLINE -ifneq ($(RETPOLINE_VDSO_CFLAGS),) - KBUILD_CFLAGS_32 += $(RETPOLINE_VDSO_CFLAGS) -endif -endif - -$(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) - -$(obj)/vdso32.so.dbg: $(obj)/vdso32/vdso32.lds $(vobjs32) FORCE - $(call if_changed,vdso_and_check) - -# -# The DSO images are built using a special linker script. -# -quiet_cmd_vdso = VDSO $@ - cmd_vdso = $(LD) -o $@ \ - $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ - -T $(filter %.lds,$^) $(filter %.o,$^) - -VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 --no-undefined \ - $(call ld-option, --eh-frame-hdr) -Bsymbolic -z noexecstack - -quiet_cmd_vdso_and_check = VDSO $@ - cmd_vdso_and_check = $(cmd_vdso); $(cmd_vdso_check) +# vDSO directories +obj-$(CONFIG_X86_64) += vdso64/ +obj-$(CONFIG_COMPAT_32) += vdso32/ |