[mirror_ubuntu-bionic-kernel.git] / arch / mips / vdso / Makefile

# Objects to go into the VDSO.
obj-vdso-y := elf.o gettimeofday.o sigreturn.o

# Common compiler flags between ABIs.
ccflags-vdso := \
	$(filter -I%,$(KBUILD_CFLAGS)) \
	$(filter -E%,$(KBUILD_CFLAGS)) \
	$(filter -march=%,$(KBUILD_CFLAGS))
cflags-vdso := $(ccflags-vdso) \
	$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
	-O2 -g -fPIC -fno-common -fno-builtin -G 0 -DDISABLE_BRANCH_PROFILING \
	$(call cc-option, -fno-stack-protector)
aflags-vdso := $(ccflags-vdso) \
	$(filter -I%,$(KBUILD_CFLAGS)) \
	$(filter -E%,$(KBUILD_CFLAGS)) \
	-D__ASSEMBLY__ -Wa,-gdwarf-2

#
# For the pre-R6 code in arch/mips/vdso/vdso.h for locating
# the base address of VDSO, the linker will emit a R_MIPS_PC32
# relocation in binutils > 2.25 but it will fail with older versions
# because that relocation is not supported for that symbol. As a result
# of which we are forced to disable the VDSO symbols when building
# with < 2.25 binutils on pre-R6 kernels. For more references on why we
# can't use other methods to get the base address of VDSO please refer to
# the comments on that file.
#
ifndef CONFIG_CPU_MIPSR6
  ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
    $(warning MIPS VDSO requires binutils >= 2.25)
    obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
    ccflags-vdso += -DDISABLE_MIPS_VDSO
  endif
endif

# VDSO linker flags.
VDSO_LDFLAGS := \
	-Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \
	-nostdlib -shared \
	$(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
	$(call cc-ldoption, -Wl$(comma)--build-id)

GCOV_PROFILE := n

#
# Shared build commands.
#

quiet_cmd_vdsold = VDSO    $@
      cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
                   -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -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-y := 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 := $(native-abi)

$(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
	$(call if_changed,vdsold)

$(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,as_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 := -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)

$(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,as_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 := -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)

$(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...
Commit	Line	Data
ebb5e78c AS	1	# Objects to go into the VDSO.
	2	obj-vdso-y := elf.o gettimeofday.o sigreturn.o
	3
	4	# Common compiler flags between ABIs.
	5	ccflags-vdso := \
	6	$(filter -I%,$(KBUILD_CFLAGS)) \
	7	$(filter -E%,$(KBUILD_CFLAGS)) \
	8	$(filter -march=%,$(KBUILD_CFLAGS))
	9	cflags-vdso := $(ccflags-vdso) \
	10	$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
	11	-O2 -g -fPIC -fno-common -fno-builtin -G 0 -DDISABLE_BRANCH_PROFILING \
	12	$(call cc-option, -fno-stack-protector)
	13	aflags-vdso := $(ccflags-vdso) \
	14	$(filter -I%,$(KBUILD_CFLAGS)) \
	15	$(filter -E%,$(KBUILD_CFLAGS)) \
	16	-D__ASSEMBLY__ -Wa,-gdwarf-2
	17
	18	#
	19	# For the pre-R6 code in arch/mips/vdso/vdso.h for locating
	20	# the base address of VDSO, the linker will emit a R_MIPS_PC32
	21	# relocation in binutils > 2.25 but it will fail with older versions
	22	# because that relocation is not supported for that symbol. As a result
	23	# of which we are forced to disable the VDSO symbols when building
	24	# with < 2.25 binutils on pre-R6 kernels. For more references on why we
	25	# can't use other methods to get the base address of VDSO please refer to
	26	# the comments on that file.
	27	#
	28	ifndef CONFIG_CPU_MIPSR6
d5ece1cb	29	ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
2a037f31	30	$(warning MIPS VDSO requires binutils >= 2.25)
ebb5e78c AS	31	obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
	32	ccflags-vdso += -DDISABLE_MIPS_VDSO
	33	endif
	34	endif
	35
	36	# VDSO linker flags.
	37	VDSO_LDFLAGS := \
	38	-Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \
	39	-nostdlib -shared \
	40	$(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
	41	$(call cc-ldoption, -Wl$(comma)--build-id)
	42
	43	GCOV_PROFILE := n
	44
	45	#
	46	# Shared build commands.
	47	#
	48
	49	quiet_cmd_vdsold = VDSO $@
	50	cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
	51	-Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
	52
2afb9745 JH	53	# Strip rule for the raw .so files
	54	$(obj)/%.so.raw: OBJCOPYFLAGS := -S
	55	$(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
	56	$(call if_changed,objcopy)
	57
ebb5e78c AS	58	hostprogs-y := genvdso
	59
	60	quiet_cmd_genvdso = GENVDSO $@
	61	define cmd_genvdso
2afb9745 JH	62	$(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
2afb9745 JH	63	$(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
ebb5e78c AS	64	endef
	65
	66	#
	67	# Build native VDSO.
	68	#
	69
	70	native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
	71
	72	targets += $(obj-vdso-y)
2afb9745 JH	73	targets += vdso.lds
	74	targets += vdso.so.dbg.raw vdso.so.raw
	75	targets += vdso.so.dbg vdso.so
	76	targets += vdso-image.c
ebb5e78c AS	77
	78	obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
	79
	80	$(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
	81	$(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
	82
	83	$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(native-abi)
	84
2afb9745	85	$(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
ebb5e78c AS	86	$(call if_changed,vdsold)
ebb5e78c AS	87
2afb9745 JH	88	$(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
2afb9745 JH	89	$(obj)/genvdso FORCE
ebb5e78c AS	90	$(call if_changed,genvdso)
	91
	92	obj-y += vdso-image.o
	93
	94	#
	95	# Build O32 VDSO.
	96	#
	97
	98	# Define these outside the ifdef to ensure they are picked up by clean.
	99	targets += $(obj-vdso-y:%.o=%-o32.o)
2afb9745 JH	100	targets += vdso-o32.lds
	101	targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
	102	targets += vdso-o32.so.dbg vdso-o32.so
	103	targets += vdso-o32-image.c
ebb5e78c AS	104
	105	ifdef CONFIG_MIPS32_O32
	106
	107	obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
	108
	109	$(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
	110	$(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
	111
	112	$(obj)/%-o32.o: $(src)/%.S FORCE
	113	$(call if_changed_dep,as_o_S)
	114
	115	$(obj)/%-o32.o: $(src)/%.c FORCE
	116	$(call cmd,force_checksrc)
	117	$(call if_changed_rule,cc_o_c)
	118
	119	$(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := -mabi=32
	120	$(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
	121	$(call if_changed_dep,cpp_lds_S)
	122
2afb9745	123	$(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
ebb5e78c AS	124	$(call if_changed,vdsold)
	125
	126	$(obj)/vdso-o32-image.c: VDSO_NAME := o32
2afb9745 JH	127	$(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
2afb9745 JH	128	$(obj)/genvdso FORCE
ebb5e78c AS	129	$(call if_changed,genvdso)
	130
	131	obj-y += vdso-o32-image.o
	132
	133	endif
	134
	135	#
	136	# Build N32 VDSO.
	137	#
	138
	139	targets += $(obj-vdso-y:%.o=%-n32.o)
2afb9745 JH	140	targets += vdso-n32.lds
	141	targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
	142	targets += vdso-n32.so.dbg vdso-n32.so
	143	targets += vdso-n32-image.c
ebb5e78c AS	144
	145	ifdef CONFIG_MIPS32_N32
	146
	147	obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
	148
	149	$(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
	150	$(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
	151
	152	$(obj)/%-n32.o: $(src)/%.S FORCE
	153	$(call if_changed_dep,as_o_S)
	154
	155	$(obj)/%-n32.o: $(src)/%.c FORCE
	156	$(call cmd,force_checksrc)
	157	$(call if_changed_rule,cc_o_c)
	158
	159	$(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := -mabi=n32
	160	$(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
	161	$(call if_changed_dep,cpp_lds_S)
	162
2afb9745	163	$(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
ebb5e78c AS	164	$(call if_changed,vdsold)
	165
	166	$(obj)/vdso-n32-image.c: VDSO_NAME := n32
2afb9745 JH	167	$(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
2afb9745 JH	168	$(obj)/genvdso FORCE
ebb5e78c AS	169	$(call if_changed,genvdso)
	170
	171	obj-y += vdso-n32-image.o
	172
	173	endif
	174
	175	# FIXME: Need install rule for debug.
	176	# Needs to deal with dependency for generation of dbg by cmd_genvdso...