207 lines
5.9 KiB
Makefile
207 lines
5.9 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
# Objects to go into the VDSO.
|
|
|
|
# Sanitizer runtimes are unavailable and cannot be linked here.
|
|
KCSAN_SANITIZE := n
|
|
|
|
# Include the generic Makefile to check the built vdso.
|
|
include $(srctree)/lib/vdso/Makefile
|
|
|
|
obj-vdso-y := elf.o vgettimeofday.o sigreturn.o
|
|
|
|
# Common compiler flags between ABIs.
|
|
ccflags-vdso := \
|
|
$(filter -I%,$(KBUILD_CFLAGS)) \
|
|
$(filter -E%,$(KBUILD_CFLAGS)) \
|
|
$(filter -mmicromips,$(KBUILD_CFLAGS)) \
|
|
$(filter -march=%,$(KBUILD_CFLAGS)) \
|
|
$(filter -m%-float,$(KBUILD_CFLAGS)) \
|
|
$(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
|
|
$(CLANG_FLAGS) \
|
|
-D__VDSO__
|
|
|
|
ifndef CONFIG_64BIT
|
|
ccflags-vdso += -DBUILD_VDSO32
|
|
endif
|
|
|
|
#
|
|
# The -fno-jump-tables flag only prevents the compiler from generating
|
|
# jump tables but does not prevent the compiler from emitting absolute
|
|
# offsets.
|
|
cflags-vdso := $(ccflags-vdso) \
|
|
$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
|
|
-O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
|
|
-mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
|
|
-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
|
|
$(call cc-option, -fno-asynchronous-unwind-tables)
|
|
aflags-vdso := $(ccflags-vdso) \
|
|
-D__ASSEMBLY__ -Wa,-gdwarf-2
|
|
|
|
ifneq ($(c-gettimeofday-y),)
|
|
CFLAGS_vgettimeofday.o = -include $(c-gettimeofday-y)
|
|
|
|
# config-n32-o32-env.c prepares the environment to build a 32bit vDSO
|
|
# library on a 64bit kernel.
|
|
# Note: Needs to be included before than the generic library.
|
|
CFLAGS_vgettimeofday-o32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
|
|
CFLAGS_vgettimeofday-n32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
|
|
endif
|
|
|
|
CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
|
|
|
|
ifdef CONFIG_MIPS_DISABLE_VDSO
|
|
obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y))
|
|
endif
|
|
|
|
# VDSO linker flags.
|
|
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
|
|
$(filter -E%,$(KBUILD_CFLAGS)) -shared \
|
|
-G 0 --eh-frame-hdr --hash-style=sysv --build-id=sha1 -T
|
|
|
|
CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE)
|
|
|
|
GCOV_PROFILE := n
|
|
UBSAN_SANITIZE := n
|
|
KCOV_INSTRUMENT := n
|
|
|
|
# Check that we don't have PIC 'jalr t9' calls left
|
|
quiet_cmd_vdso_mips_check = VDSOCHK $@
|
|
cmd_vdso_mips_check = if $(OBJDUMP) --disassemble $@ | grep -E -h "jalr.*t9" > /dev/null; \
|
|
then (echo >&2 "$@: PIC 'jalr t9' calls are not supported"; \
|
|
rm -f $@; /bin/false); fi
|
|
|
|
#
|
|
# Shared build commands.
|
|
#
|
|
|
|
quiet_cmd_vdsold_and_vdso_check = LD $@
|
|
cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check); $(cmd_vdso_mips_check)
|
|
|
|
quiet_cmd_vdsoas_o_S = AS $@
|
|
cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
|
|
|
|
# Strip rule for the raw .so files
|
|
$(obj)/%.so.raw: OBJCOPYFLAGS := -S
|
|
$(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
hostprogs := genvdso
|
|
|
|
quiet_cmd_genvdso = GENVDSO $@
|
|
define cmd_genvdso
|
|
$(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
|
|
$(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
|
|
endef
|
|
|
|
#
|
|
# Build native VDSO.
|
|
#
|
|
|
|
native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
|
|
|
|
targets += $(obj-vdso-y)
|
|
targets += vdso.lds
|
|
targets += vdso.so.dbg.raw vdso.so.raw
|
|
targets += vdso.so.dbg vdso.so
|
|
targets += vdso-image.c
|
|
|
|
obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
|
|
|
|
$(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
|
|
$(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
|
|
|
|
$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
|
|
|
|
$(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
|
|
$(call if_changed,vdsold_and_vdso_check)
|
|
|
|
$(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
|
|
$(obj)/genvdso FORCE
|
|
$(call if_changed,genvdso)
|
|
|
|
obj-y += vdso-image.o
|
|
|
|
#
|
|
# Build O32 VDSO.
|
|
#
|
|
|
|
# Define these outside the ifdef to ensure they are picked up by clean.
|
|
targets += $(obj-vdso-y:%.o=%-o32.o)
|
|
targets += vdso-o32.lds
|
|
targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
|
|
targets += vdso-o32.so.dbg vdso-o32.so
|
|
targets += vdso-o32-image.c
|
|
|
|
ifdef CONFIG_MIPS32_O32
|
|
|
|
obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
|
|
|
|
$(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
|
|
$(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
|
|
|
|
$(obj)/%-o32.o: $(src)/%.S FORCE
|
|
$(call if_changed_dep,vdsoas_o_S)
|
|
|
|
$(obj)/%-o32.o: $(src)/%.c FORCE
|
|
$(call cmd,force_checksrc)
|
|
$(call if_changed_rule,cc_o_c)
|
|
|
|
$(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
|
|
$(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
|
|
$(call if_changed_dep,cpp_lds_S)
|
|
|
|
$(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
|
|
$(call if_changed,vdsold_and_vdso_check)
|
|
|
|
$(obj)/vdso-o32-image.c: VDSO_NAME := o32
|
|
$(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
|
|
$(obj)/genvdso FORCE
|
|
$(call if_changed,genvdso)
|
|
|
|
obj-y += vdso-o32-image.o
|
|
|
|
endif
|
|
|
|
#
|
|
# Build N32 VDSO.
|
|
#
|
|
|
|
targets += $(obj-vdso-y:%.o=%-n32.o)
|
|
targets += vdso-n32.lds
|
|
targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
|
|
targets += vdso-n32.so.dbg vdso-n32.so
|
|
targets += vdso-n32-image.c
|
|
|
|
ifdef CONFIG_MIPS32_N32
|
|
|
|
obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
|
|
|
|
$(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
|
|
$(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
|
|
|
|
$(obj)/%-n32.o: $(src)/%.S FORCE
|
|
$(call if_changed_dep,vdsoas_o_S)
|
|
|
|
$(obj)/%-n32.o: $(src)/%.c FORCE
|
|
$(call cmd,force_checksrc)
|
|
$(call if_changed_rule,cc_o_c)
|
|
|
|
$(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
|
|
$(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
|
|
$(call if_changed_dep,cpp_lds_S)
|
|
|
|
$(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
|
|
$(call if_changed,vdsold_and_vdso_check)
|
|
|
|
$(obj)/vdso-n32-image.c: VDSO_NAME := n32
|
|
$(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
|
|
$(obj)/genvdso FORCE
|
|
$(call if_changed,genvdso)
|
|
|
|
obj-y += vdso-n32-image.o
|
|
|
|
endif
|
|
|
|
# FIXME: Need install rule for debug.
|
|
# Needs to deal with dependency for generation of dbg by cmd_genvdso...
|