162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci# Objects to go into the VDSO. 362306a36Sopenharmony_ci 462306a36Sopenharmony_ciKASAN_SANITIZE := n 562306a36Sopenharmony_ciUBSAN_SANITIZE := n 662306a36Sopenharmony_ciKCOV_INSTRUMENT := n 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci# Include the generic Makefile to check the built vdso. 962306a36Sopenharmony_ciinclude $(srctree)/lib/vdso/Makefile 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciobj-vdso-y := elf.o vgetcpu.o vgettimeofday.o sigreturn.o 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci# Common compiler flags between ABIs. 1462306a36Sopenharmony_ciccflags-vdso := \ 1562306a36Sopenharmony_ci $(filter -I%,$(KBUILD_CFLAGS)) \ 1662306a36Sopenharmony_ci $(filter -E%,$(KBUILD_CFLAGS)) \ 1762306a36Sopenharmony_ci $(filter -march=%,$(KBUILD_CFLAGS)) \ 1862306a36Sopenharmony_ci $(filter -m%-float,$(KBUILD_CFLAGS)) \ 1962306a36Sopenharmony_ci $(CLANG_FLAGS) \ 2062306a36Sopenharmony_ci -D__VDSO__ 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_cicflags-vdso := $(ccflags-vdso) \ 2362306a36Sopenharmony_ci -isystem $(shell $(CC) -print-file-name=include) \ 2462306a36Sopenharmony_ci $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ 2562306a36Sopenharmony_ci -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \ 2662306a36Sopenharmony_ci -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \ 2762306a36Sopenharmony_ci $(call cc-option, -fno-asynchronous-unwind-tables) \ 2862306a36Sopenharmony_ci $(call cc-option, -fno-stack-protector) 2962306a36Sopenharmony_ciaflags-vdso := $(ccflags-vdso) \ 3062306a36Sopenharmony_ci -D__ASSEMBLY__ -Wa,-gdwarf-2 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ciifneq ($(c-gettimeofday-y),) 3362306a36Sopenharmony_ci CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y) 3462306a36Sopenharmony_ciendif 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci# VDSO linker flags. 3762306a36Sopenharmony_cildflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \ 3862306a36Sopenharmony_ci $(filter -E%,$(KBUILD_CFLAGS)) -nostdlib -shared \ 3962306a36Sopenharmony_ci --hash-style=sysv --build-id -T 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ciGCOV_PROFILE := n 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ci# 4462306a36Sopenharmony_ci# Shared build commands. 4562306a36Sopenharmony_ci# 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ciquiet_cmd_vdsold_and_vdso_check = LD $@ 4862306a36Sopenharmony_ci cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check) 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ciquiet_cmd_vdsoas_o_S = AS $@ 5162306a36Sopenharmony_ci cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $< 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ci# Generate VDSO offsets using helper script 5462306a36Sopenharmony_cigen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh 5562306a36Sopenharmony_ciquiet_cmd_vdsosym = VDSOSYM $@ 5662306a36Sopenharmony_ci cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 5762306a36Sopenharmony_ci 5862306a36Sopenharmony_ciinclude/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE 5962306a36Sopenharmony_ci $(call if_changed,vdsosym) 6062306a36Sopenharmony_ci 6162306a36Sopenharmony_ci# 6262306a36Sopenharmony_ci# Build native VDSO. 6362306a36Sopenharmony_ci# 6462306a36Sopenharmony_ci 6562306a36Sopenharmony_cinative-abi := $(filter -mabi=%,$(KBUILD_CFLAGS)) 6662306a36Sopenharmony_ci 6762306a36Sopenharmony_citargets += $(obj-vdso-y) 6862306a36Sopenharmony_citargets += vdso.lds vdso.so.dbg vdso.so 6962306a36Sopenharmony_ci 7062306a36Sopenharmony_ciobj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) 7162306a36Sopenharmony_ci 7262306a36Sopenharmony_ci$(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi) 7362306a36Sopenharmony_ci$(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi) 7462306a36Sopenharmony_ci 7562306a36Sopenharmony_ci$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi) 7662306a36Sopenharmony_ci 7762306a36Sopenharmony_ci$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE 7862306a36Sopenharmony_ci $(call if_changed,vdsold_and_vdso_check) 7962306a36Sopenharmony_ci 8062306a36Sopenharmony_ci$(obj)/vdso.so: OBJCOPYFLAGS := -S 8162306a36Sopenharmony_ci$(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE 8262306a36Sopenharmony_ci $(call if_changed,objcopy) 8362306a36Sopenharmony_ci 8462306a36Sopenharmony_ciobj-y += vdso.o 8562306a36Sopenharmony_ci 8662306a36Sopenharmony_ci$(obj)/vdso.o : $(obj)/vdso.so 8762306a36Sopenharmony_ci 8862306a36Sopenharmony_ci# install commands for the unstripped file 8962306a36Sopenharmony_ciquiet_cmd_vdso_install = INSTALL $@ 9062306a36Sopenharmony_ci cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 9162306a36Sopenharmony_ci 9262306a36Sopenharmony_civdso.so: $(obj)/vdso.so.dbg 9362306a36Sopenharmony_ci @mkdir -p $(MODLIB)/vdso 9462306a36Sopenharmony_ci $(call cmd,vdso_install) 9562306a36Sopenharmony_ci 9662306a36Sopenharmony_civdso_install: vdso.so 97