[thirdparty/linux.git] / arch / arm64 / kernel / vdso32 / Makefile

# SPDX-License-Identifier: GPL-2.0
#
# Makefile for vdso32
#

# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
# the inclusion of generic Makefile.
ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32
include $(srctree)/lib/vdso/Makefile

# Same as cc-*option, but using CC_COMPAT instead of CC
ifeq ($(CONFIG_CC_IS_CLANG), y)
COMPAT_GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE_COMPAT)elfedit))
COMPAT_GCC_TOOLCHAIN := $(realpath $(COMPAT_GCC_TOOLCHAIN_DIR)/..)

CC_COMPAT_CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
CC_COMPAT_CLANG_FLAGS += --prefix=$(COMPAT_GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE_COMPAT))
CC_COMPAT_CLANG_FLAGS += -no-integrated-as -Qunused-arguments
ifneq ($(COMPAT_GCC_TOOLCHAIN),)
CC_COMPAT_CLANG_FLAGS += --gcc-toolchain=$(COMPAT_GCC_TOOLCHAIN)
endif

CC_COMPAT ?= $(CC)
CC_COMPAT += $(CC_COMPAT_CLANG_FLAGS)
else
CC_COMPAT ?= $(CROSS_COMPILE_COMPAT)gcc
endif

cc32-option = $(call try-run,\
        $(CC_COMPAT) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
cc32-disable-warning = $(call try-run,\
	$(CC_COMPAT) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
cc32-ldoption = $(call try-run,\
        $(CC_COMPAT) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
cc32-as-instr = $(call try-run,\
	printf "%b\n" "$(1)" | $(CC_COMPAT) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))

# We cannot use the global flags to compile the vDSO files, the main reason
# being that the 32-bit compiler may be older than the main (64-bit) compiler
# and therefore may not understand flags set using $(cc-option ...). Besides,
# arch-specific options should be taken from the arm Makefile instead of the
# arm64 one.
# As a result we set our own flags here.

# KBUILD_CPPFLAGS and NOSTDINC_FLAGS from top-level Makefile
VDSO_CPPFLAGS := -D__KERNEL__ -nostdinc -isystem $(shell $(CC_COMPAT) -print-file-name=include)
VDSO_CPPFLAGS += $(LINUXINCLUDE)

# Common C and assembly flags
# From top-level Makefile
VDSO_CAFLAGS := $(VDSO_CPPFLAGS)
ifneq ($(shell $(CC_COMPAT) --version 2>&1 | head -n 1 | grep clang),)
VDSO_CAFLAGS += --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
endif

VDSO_CAFLAGS += $(call cc32-option,-fno-PIE)
ifdef CONFIG_DEBUG_INFO
VDSO_CAFLAGS += -g
endif

# From arm Makefile
VDSO_CAFLAGS += $(call cc32-option,-fno-dwarf2-cfi-asm)
VDSO_CAFLAGS += -mabi=aapcs-linux -mfloat-abi=soft
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
VDSO_CAFLAGS += -mbig-endian
else
VDSO_CAFLAGS += -mlittle-endian
endif

# From arm vDSO Makefile
VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING


# Try to compile for ARMv8. If the compiler is too old and doesn't support it,
# fall back to v7. There is no easy way to check for what architecture the code
# is being compiled, so define a macro specifying that (see arch/arm/Makefile).
VDSO_CAFLAGS += $(call cc32-option,-march=armv8-a -D__LINUX_ARM_ARCH__=8,\
                                   -march=armv7-a -D__LINUX_ARM_ARCH__=7)

VDSO_CFLAGS := $(VDSO_CAFLAGS)
VDSO_CFLAGS += -DENABLE_COMPAT_VDSO=1
# KBUILD_CFLAGS from top-level Makefile
VDSO_CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
               -fno-strict-aliasing -fno-common \
               -Werror-implicit-function-declaration \
               -Wno-format-security \
               -std=gnu89
VDSO_CFLAGS  += -O2
# Some useful compiler-dependent flags from top-level Makefile
VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
VDSO_CFLAGS += -fno-strict-overflow
VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)
VDSO_CFLAGS += -Werror=date-time
VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)

# The 32-bit compiler does not provide 128-bit integers, which are used in
# some headers that are indirectly included from the vDSO code.
# This hack makes the compiler happy and should trigger a warning/error if
# variables of such type are referenced.
VDSO_CFLAGS += -D__uint128_t='void*'
# Silence some warnings coming from headers that operate on long's
# (on GCC 4.8 or older, there is unfortunately no way to silence this warning)
VDSO_CFLAGS += $(call cc32-disable-warning,shift-count-overflow)
VDSO_CFLAGS += -Wno-int-to-pointer-cast

# Compile as THUMB2 or ARM. Unwinding via frame-pointers in THUMB2 is
# unreliable.
ifeq ($(CONFIG_THUMB2_COMPAT_VDSO), y)
VDSO_CFLAGS += -mthumb -fomit-frame-pointer
else
VDSO_CFLAGS += -marm
endif

VDSO_AFLAGS := $(VDSO_CAFLAGS)
VDSO_AFLAGS += -D__ASSEMBLY__

# Check for binutils support for dmb ishld
dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)

VDSO_CFLAGS += $(dmbinstr)
VDSO_AFLAGS += $(dmbinstr)

VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
# From arm vDSO Makefile
VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
VDSO_LDFLAGS += -Wl,--hash-style=sysv
VDSO_LDFLAGS += -Wl,--build-id=sha1
VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)


# Borrow vdsomunge.c from the arm vDSO
# We have to use a relative path because scripts/Makefile.host prefixes
# $(hostprogs) with $(obj)
munge := ../../../arm/vdso/vdsomunge
hostprogs := $(munge)

c-obj-vdso := note.o
c-obj-vdso-gettimeofday := vgettimeofday.o

ifneq ($(c-gettimeofday-y),)
VDSO_CFLAGS_gettimeofday_o += -include $(c-gettimeofday-y)
endif

VDSO_CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os

# Build rules
targets := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso) vdso.so vdso.so.dbg vdso.so.raw
c-obj-vdso := $(addprefix $(obj)/, $(c-obj-vdso))
c-obj-vdso-gettimeofday := $(addprefix $(obj)/, $(c-obj-vdso-gettimeofday))
asm-obj-vdso := $(addprefix $(obj)/, $(asm-obj-vdso))
obj-vdso := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso)

obj-y += vdso.o
targets += vdso.lds
CPPFLAGS_vdso.lds += -P -C -U$(ARCH)

# Force dependency (vdso.s includes vdso.so through incbin)
$(obj)/vdso.o: $(obj)/vdso.so

include/generated/vdso32-offsets.h: $(obj)/vdso.so.dbg FORCE
	$(call if_changed,vdsosym)

# Strip rule for vdso.so
$(obj)/vdso.so: OBJCOPYFLAGS := -S
$(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE
	$(call if_changed,objcopy)

$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE
	$(call if_changed,vdsomunge)

# Link rule for the .so file, .lds has to be first
$(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE
	$(call if_changed,vdsold_and_vdso_check)

# Compilation rules for the vDSO sources
$(c-obj-vdso): %.o: %.c FORCE
	$(call if_changed_dep,vdsocc)
$(c-obj-vdso-gettimeofday): %.o: %.c FORCE
	$(call if_changed_dep,vdsocc_gettimeofday)
$(asm-obj-vdso): %.o: %.S FORCE
	$(call if_changed_dep,vdsoas)

# Actual build commands
quiet_cmd_vdsold_and_vdso_check = LD32    $@
      cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check)

quiet_cmd_vdsold = LD32    $@
      cmd_vdsold = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \
                   -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
quiet_cmd_vdsocc = CC32    $@
      cmd_vdsocc = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) -c -o $@ $<
quiet_cmd_vdsocc_gettimeofday = CC32    $@
      cmd_vdsocc_gettimeofday = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) $(VDSO_CFLAGS_gettimeofday_o) -c -o $@ $<
quiet_cmd_vdsoas = AS32    $@
      cmd_vdsoas = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_AFLAGS) -c -o $@ $<

quiet_cmd_vdsomunge = MUNGE   $@
      cmd_vdsomunge = $(obj)/$(munge) $< $@

# Generate vDSO offsets using helper script (borrowed from the 64-bit vDSO)
gen-vdsosym := $(srctree)/$(src)/../vdso/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
# The AArch64 nm should be able to read an AArch32 binary
      cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@

# Install commands for the unstripped file
quiet_cmd_vdso_install = INSTALL32 $@
      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/vdso32.so

vdso.so: $(obj)/vdso.so.dbg
	@mkdir -p $(MODLIB)/vdso
	$(call cmd,vdso_install)

vdso_install: vdso.so
Commit	Line	Data
a7f71a2c VF	1	# SPDX-License-Identifier: GPL-2.0
	2	#
	3	# Makefile for vdso32
	4	#
	5
	6	# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
	7	# the inclusion of generic Makefile.
	8	ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT\|R_ARM_GLOB_DAT\|R_ARM_ABS32
	9	include $(srctree)/lib/vdso/Makefile
	10
eff9cb67	11	# Same as cc-*option, but using CC_COMPAT instead of CC
bcaf9b57	12	ifeq ($(CONFIG_CC_IS_CLANG), y)
a5d442f5 VF	13	COMPAT_GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE_COMPAT)elfedit))
	14	COMPAT_GCC_TOOLCHAIN := $(realpath $(COMPAT_GCC_TOOLCHAIN_DIR)/..)
	15
	16	CC_COMPAT_CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
7b7891c7	17	CC_COMPAT_CLANG_FLAGS += --prefix=$(COMPAT_GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE_COMPAT))
a5d442f5 VF	18	CC_COMPAT_CLANG_FLAGS += -no-integrated-as -Qunused-arguments
	19	ifneq ($(COMPAT_GCC_TOOLCHAIN),)
	20	CC_COMPAT_CLANG_FLAGS += --gcc-toolchain=$(COMPAT_GCC_TOOLCHAIN)
	21	endif
	22
eff9cb67	23	CC_COMPAT ?= $(CC)
a5d442f5	24	CC_COMPAT += $(CC_COMPAT_CLANG_FLAGS)
bcaf9b57	25	else
eff9cb67	26	CC_COMPAT ?= $(CROSS_COMPILE_COMPAT)gcc
bcaf9b57 WD	27	endif
bcaf9b57 WD	28
a7f71a2c	29	cc32-option = $(call try-run,\
eff9cb67	30	$(CC_COMPAT) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
a7f71a2c	31	cc32-disable-warning = $(call try-run,\
eff9cb67	32	$(CC_COMPAT) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
a7f71a2c	33	cc32-ldoption = $(call try-run,\
eff9cb67	34	$(CC_COMPAT) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
0df2c90e	35	cc32-as-instr = $(call try-run,\
eff9cb67	36	printf "%b\n" "$(1)" \| $(CC_COMPAT) $(VDSO_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
a7f71a2c VF	37
	38	# We cannot use the global flags to compile the vDSO files, the main reason
	39	# being that the 32-bit compiler may be older than the main (64-bit) compiler
	40	# and therefore may not understand flags set using $(cc-option ...). Besides,
	41	# arch-specific options should be taken from the arm Makefile instead of the
	42	# arm64 one.
	43	# As a result we set our own flags here.
	44
c71e88c4	45	# KBUILD_CPPFLAGS and NOSTDINC_FLAGS from top-level Makefile
eff9cb67	46	VDSO_CPPFLAGS := -D__KERNEL__ -nostdinc -isystem $(shell $(CC_COMPAT) -print-file-name=include)
a7f71a2c	47	VDSO_CPPFLAGS += $(LINUXINCLUDE)
a7f71a2c VF	48
	49	# Common C and assembly flags
	50	# From top-level Makefile
	51	VDSO_CAFLAGS := $(VDSO_CPPFLAGS)
eff9cb67	52	ifneq ($(shell $(CC_COMPAT) --version 2>&1 \| head -n 1 \| grep clang),)
7424ee2b WD	53	VDSO_CAFLAGS += --target=$(notdir $(CROSS_COMPILE_COMPAT:%-=%))
	54	endif
	55
a7f71a2c VF	56	VDSO_CAFLAGS += $(call cc32-option,-fno-PIE)
	57	ifdef CONFIG_DEBUG_INFO
	58	VDSO_CAFLAGS += -g
	59	endif
a7f71a2c VF	60
	61	# From arm Makefile
	62	VDSO_CAFLAGS += $(call cc32-option,-fno-dwarf2-cfi-asm)
	63	VDSO_CAFLAGS += -mabi=aapcs-linux -mfloat-abi=soft
	64	ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
	65	VDSO_CAFLAGS += -mbig-endian
	66	else
	67	VDSO_CAFLAGS += -mlittle-endian
	68	endif
	69
	70	# From arm vDSO Makefile
	71	VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
	72	VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
	73
0df2c90e	74
a7f71a2c VF	75	# Try to compile for ARMv8. If the compiler is too old and doesn't support it,
	76	# fall back to v7. There is no easy way to check for what architecture the code
	77	# is being compiled, so define a macro specifying that (see arch/arm/Makefile).
	78	VDSO_CAFLAGS += $(call cc32-option,-march=armv8-a -D__LINUX_ARM_ARCH__=8,\
	79	-march=armv7-a -D__LINUX_ARM_ARCH__=7)
	80
	81	VDSO_CFLAGS := $(VDSO_CAFLAGS)
	82	VDSO_CFLAGS += -DENABLE_COMPAT_VDSO=1
	83	# KBUILD_CFLAGS from top-level Makefile
	84	VDSO_CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
	85	-fno-strict-aliasing -fno-common \
	86	-Werror-implicit-function-declaration \
	87	-Wno-format-security \
	88	-std=gnu89
	89	VDSO_CFLAGS += -O2
	90	# Some useful compiler-dependent flags from top-level Makefile
	91	VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
	92	VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
8b42cf2f	93	VDSO_CFLAGS += -fno-strict-overflow
a7f71a2c	94	VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)
87de84c9	95	VDSO_CFLAGS += -Werror=date-time
a7f71a2c VF	96	VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)
	97
	98	# The 32-bit compiler does not provide 128-bit integers, which are used in
	99	# some headers that are indirectly included from the vDSO code.
	100	# This hack makes the compiler happy and should trigger a warning/error if
	101	# variables of such type are referenced.
	102	VDSO_CFLAGS += -D__uint128_t='void*'
	103	# Silence some warnings coming from headers that operate on long's
	104	# (on GCC 4.8 or older, there is unfortunately no way to silence this warning)
	105	VDSO_CFLAGS += $(call cc32-disable-warning,shift-count-overflow)
	106	VDSO_CFLAGS += -Wno-int-to-pointer-cast
	107
625412c2 ND	108	# Compile as THUMB2 or ARM. Unwinding via frame-pointers in THUMB2 is
	109	# unreliable.
	110	ifeq ($(CONFIG_THUMB2_COMPAT_VDSO), y)
	111	VDSO_CFLAGS += -mthumb -fomit-frame-pointer
	112	else
	113	VDSO_CFLAGS += -marm
	114	endif
	115
a7f71a2c VF	116	VDSO_AFLAGS := $(VDSO_CAFLAGS)
	117	VDSO_AFLAGS += -D__ASSEMBLY__
	118
0df2c90e VF	119	# Check for binutils support for dmb ishld
	120	dmbinstr := $(call cc32-as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1)
	121
	122	VDSO_CFLAGS += $(dmbinstr)
	123	VDSO_AFLAGS += $(dmbinstr)
	124
a7f71a2c VF	125	VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
	126	# From arm vDSO Makefile
	127	VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
	128	VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
	129	VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
89ff7131	130	VDSO_LDFLAGS += -Wl,--hash-style=sysv
a9684337	131	VDSO_LDFLAGS += -Wl,--build-id=sha1
a7f71a2c VF	132	VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
	133
	134
	135	# Borrow vdsomunge.c from the arm vDSO
	136	# We have to use a relative path because scripts/Makefile.host prefixes
5f2fb52f	137	# $(hostprogs) with $(obj)
a7f71a2c	138	munge := ../../../arm/vdso/vdsomunge
5f2fb52f	139	hostprogs := $(munge)
a7f71a2c VF	140
	141	c-obj-vdso := note.o
	142	c-obj-vdso-gettimeofday := vgettimeofday.o
a7f71a2c VF	143
	144	ifneq ($(c-gettimeofday-y),)
	145	VDSO_CFLAGS_gettimeofday_o += -include $(c-gettimeofday-y)
	146	endif
	147
	148	VDSO_CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os
	149
	150	# Build rules
	151	targets := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso) vdso.so vdso.so.dbg vdso.so.raw
	152	c-obj-vdso := $(addprefix $(obj)/, $(c-obj-vdso))
	153	c-obj-vdso-gettimeofday := $(addprefix $(obj)/, $(c-obj-vdso-gettimeofday))
	154	asm-obj-vdso := $(addprefix $(obj)/, $(asm-obj-vdso))
	155	obj-vdso := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso)
	156
	157	obj-y += vdso.o
887af6d7	158	targets += vdso.lds
a7f71a2c VF	159	CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
	160
	161	# Force dependency (vdso.s includes vdso.so through incbin)
	162	$(obj)/vdso.o: $(obj)/vdso.so
	163
	164	include/generated/vdso32-offsets.h: $(obj)/vdso.so.dbg FORCE
	165	$(call if_changed,vdsosym)
	166
	167	# Strip rule for vdso.so
	168	$(obj)/vdso.so: OBJCOPYFLAGS := -S
	169	$(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE
	170	$(call if_changed,objcopy)
	171
	172	$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE
	173	$(call if_changed,vdsomunge)
	174
	175	# Link rule for the .so file, .lds has to be first
	176	$(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE
2e2f3c9b	177	$(call if_changed,vdsold_and_vdso_check)
a7f71a2c VF	178
	179	# Compilation rules for the vDSO sources
	180	$(c-obj-vdso): %.o: %.c FORCE
	181	$(call if_changed_dep,vdsocc)
	182	$(c-obj-vdso-gettimeofday): %.o: %.c FORCE
	183	$(call if_changed_dep,vdsocc_gettimeofday)
	184	$(asm-obj-vdso): %.o: %.S FORCE
	185	$(call if_changed_dep,vdsoas)
	186
	187	# Actual build commands
a88754b2	188	quiet_cmd_vdsold_and_vdso_check = LD32 $@
2e2f3c9b NA	189	cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check)
2e2f3c9b NA	190
a88754b2	191	quiet_cmd_vdsold = LD32 $@
eff9cb67	192	cmd_vdsold = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \
a7f71a2c	193	-Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
a88754b2	194	quiet_cmd_vdsocc = CC32 $@
eff9cb67	195	cmd_vdsocc = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) -c -o $@ $<
a88754b2	196	quiet_cmd_vdsocc_gettimeofday = CC32 $@
eff9cb67	197	cmd_vdsocc_gettimeofday = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) $(VDSO_CFLAGS_gettimeofday_o) -c -o $@ $<
a88754b2	198	quiet_cmd_vdsoas = AS32 $@
eff9cb67	199	cmd_vdsoas = $(CC_COMPAT) -Wp,-MD,$(depfile) $(VDSO_AFLAGS) -c -o $@ $<
a7f71a2c VF	200
	201	quiet_cmd_vdsomunge = MUNGE $@
	202	cmd_vdsomunge = $(obj)/$(munge) $< $@
	203
	204	# Generate vDSO offsets using helper script (borrowed from the 64-bit vDSO)
	205	gen-vdsosym := $(srctree)/$(src)/../vdso/gen_vdso_offsets.sh
	206	quiet_cmd_vdsosym = VDSOSYM $@
	207	# The AArch64 nm should be able to read an AArch32 binary
	208	cmd_vdsosym = $(NM) $< \| $(gen-vdsosym) \| LC_ALL=C sort > $@
	209
	210	# Install commands for the unstripped file
8d75785a	211	quiet_cmd_vdso_install = INSTALL32 $@
a7f71a2c VF	212	cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/vdso32.so
	213
	214	vdso.so: $(obj)/vdso.so.dbg
	215	@mkdir -p $(MODLIB)/vdso
	216	$(call cmd,vdso_install)
	217
	218	vdso_install: vdso.so