1 # SPDX-License-Identifier: GPL-2.0-only !! 1 # SPDX-License-Identifier: GPL-2.0
2 # !! 2 # Objects to go into the VDSO.
3 # Building vDSO images for sparc. <<
4 # <<
5 3
6 # files to link into the vdso !! 4 # Include the generic Makefile to check the built vdso.
7 vobjs-y := vdso-note.o vclock_gettime.o !! 5 include $(srctree)/lib/vdso/Makefile
8 6
9 # files to link into kernel !! 7 obj-vdso-y := elf.o vgettimeofday.o sigreturn.o
10 obj-y += vma.o !! 8
>> 9 # Common compiler flags between ABIs.
>> 10 ccflags-vdso := \
>> 11 $(filter -I%,$(KBUILD_CFLAGS)) \
>> 12 $(filter -E%,$(KBUILD_CFLAGS)) \
>> 13 $(filter -mmicromips,$(KBUILD_CFLAGS)) \
>> 14 $(filter -march=%,$(KBUILD_CFLAGS)) \
>> 15 $(filter -m%-float,$(KBUILD_CFLAGS)) \
>> 16 $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
>> 17 $(CLANG_FLAGS) \
>> 18 -D__VDSO__
>> 19
>> 20 ifndef CONFIG_64BIT
>> 21 ccflags-vdso += -DBUILD_VDSO32
>> 22 endif
>> 23
>> 24 #
>> 25 # The -fno-jump-tables flag only prevents the compiler from generating
>> 26 # jump tables but does not prevent the compiler from emitting absolute
>> 27 # offsets.
>> 28 cflags-vdso := $(ccflags-vdso) \
>> 29 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
>> 30 -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
>> 31 -mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
>> 32 -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
>> 33 $(call cc-option, -fno-asynchronous-unwind-tables)
>> 34 aflags-vdso := $(ccflags-vdso) \
>> 35 -D__ASSEMBLY__ -Wa,-gdwarf-2
>> 36
>> 37 ifneq ($(c-gettimeofday-y),)
>> 38 CFLAGS_vgettimeofday.o = -include $(c-gettimeofday-y)
>> 39
>> 40 # config-n32-o32-env.c prepares the environment to build a 32bit vDSO
>> 41 # library on a 64bit kernel.
>> 42 # Note: Needs to be included before than the generic library.
>> 43 CFLAGS_vgettimeofday-o32.o = -include $(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
>> 44 CFLAGS_vgettimeofday-n32.o = -include $(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
>> 45 endif
>> 46
>> 47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
>> 48
>> 49 ifdef CONFIG_MIPS_DISABLE_VDSO
>> 50 obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y))
>> 51 endif
>> 52
>> 53 # VDSO linker flags.
>> 54 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
>> 55 $(filter -E%,$(KBUILD_CFLAGS)) -shared \
>> 56 -G 0 --eh-frame-hdr --hash-style=sysv --build-id=sha1 -T
>> 57
>> 58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE)
>> 59
>> 60 # Check that we don't have PIC 'jalr t9' calls left
>> 61 quiet_cmd_vdso_mips_check = VDSOCHK $@
>> 62 cmd_vdso_mips_check = if $(OBJDUMP) --disassemble $@ | grep -E -h "jalr.*t9" > /dev/null; \
>> 63 then (echo >&2 "$@: PIC 'jalr t9' calls are not supported"; \
>> 64 rm -f $@; /bin/false); fi
>> 65
>> 66 #
>> 67 # Shared build commands.
>> 68 #
>> 69
>> 70 quiet_cmd_vdsold_and_vdso_check = LD $@
>> 71 cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check); $(cmd_vdso_mips_check)
>> 72
>> 73 quiet_cmd_vdsoas_o_S = AS $@
>> 74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
>> 75
>> 76 # Strip rule for the raw .so files
>> 77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
>> 78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
>> 79 $(call if_changed,objcopy)
11 80
12 # vDSO images to build !! 81 hostprogs := genvdso
13 obj-$(CONFIG_SPARC64) += vdso-image- <<
14 obj-$(CONFIG_COMPAT) += vdso-image- <<
15 82
16 vobjs := $(addprefix $(obj)/, $(vobjs-y)) !! 83 quiet_cmd_genvdso = GENVDSO $@
>> 84 define cmd_genvdso
>> 85 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
>> 86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
>> 87 endef
>> 88
>> 89 #
>> 90 # Build native VDSO.
>> 91 #
17 92
18 $(obj)/vdso.o: $(obj)/vdso.so !! 93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
19 94
20 targets += vdso.lds $(vobjs-y) !! 95 targets += $(obj-vdso-y)
21 targets += $(foreach x, 32 64, vdso-image-$(x) !! 96 targets += vdso.lds
>> 97 targets += vdso.so.dbg.raw vdso.so.raw
>> 98 targets += vdso.so.dbg vdso.so
>> 99 targets += vdso-image.c
22 100
23 CPPFLAGS_vdso.lds += -P -C !! 101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
24 102
25 VDSO_LDFLAGS_vdso.lds = -m elf64_sparc -soname !! 103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
26 -z max-page-size=8192 !! 104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
27 105
28 $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) !! 106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
29 $(call if_changed,vdso) <<
30 107
31 HOST_EXTRACFLAGS += -I$(srctree)/tools/include !! 108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
32 hostprogs += vdso2c !! 109 $(call if_changed,vdsold_and_vdso_check)
33 110
34 quiet_cmd_vdso2c = VDSO2C $@ !! 111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
35 cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg= !! 112 $(obj)/genvdso FORCE
>> 113 $(call if_changed,genvdso)
36 114
37 $(obj)/vdso-image-%.c: $(obj)/vdso%.so.dbg $(o !! 115 obj-y += vdso-image.o
38 $(call if_changed,vdso2c) <<
39 116
40 # 117 #
41 # Don't omit frame pointers for ease of usersp !! 118 # Build O32 VDSO.
42 # optimize sibling calls. <<
43 # 119 #
44 CFL := $(PROFILING) -mcmodel=medlow -fPIC -O2 <<
45 $(filter -g%,$(KBUILD_CFLAGS)) -fno-sta <<
46 -fno-omit-frame-pointer -foptimize-sibl <<
47 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO <<
48 120
49 SPARC_REG_CFLAGS = -ffixed-g4 -ffixed-g5 -fcal !! 121 # Define these outside the ifdef to ensure they are picked up by clean.
>> 122 targets += $(obj-vdso-y:%.o=%-o32.o)
>> 123 targets += vdso-o32.lds
>> 124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
>> 125 targets += vdso-o32.so.dbg vdso-o32.so
>> 126 targets += vdso-o32-image.c
>> 127
>> 128 ifdef CONFIG_MIPS32_O32
>> 129
>> 130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
>> 131
>> 132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
>> 133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
>> 134
>> 135 $(obj)/%-o32.o: $(src)/%.S FORCE
>> 136 $(call if_changed_dep,vdsoas_o_S)
>> 137
>> 138 $(obj)/%-o32.o: $(src)/%.c FORCE
>> 139 $(call cmd,force_checksrc)
>> 140 $(call if_changed_rule,cc_o_c)
>> 141
>> 142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
>> 143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
>> 144 $(call if_changed_dep,cpp_lds_S)
50 145
51 $(vobjs): KBUILD_CFLAGS := $(filter-out $(RAND !! 146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
>> 147 $(call if_changed,vdsold_and_vdso_check)
>> 148
>> 149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
>> 150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
>> 151 $(obj)/genvdso FORCE
>> 152 $(call if_changed,genvdso)
>> 153
>> 154 obj-y += vdso-o32-image.o
>> 155
>> 156 endif
52 157
53 # 158 #
54 # vDSO code runs in userspace and -pg doesn't !! 159 # Build N32 VDSO.
55 # 160 #
56 CFLAGS_REMOVE_vclock_gettime.o = -pg <<
57 CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg <<
58 161
59 $(obj)/%.so: OBJCOPYFLAGS := -S !! 162 targets += $(obj-vdso-y:%.o=%-n32.o)
60 $(obj)/%.so: $(obj)/%.so.dbg FORCE !! 163 targets += vdso-n32.lds
61 $(call if_changed,objcopy) !! 164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
>> 165 targets += vdso-n32.so.dbg vdso-n32.so
>> 166 targets += vdso-n32-image.c
>> 167
>> 168 ifdef CONFIG_MIPS32_N32
>> 169
>> 170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
>> 171
>> 172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
>> 173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
>> 174
>> 175 $(obj)/%-n32.o: $(src)/%.S FORCE
>> 176 $(call if_changed_dep,vdsoas_o_S)
>> 177
>> 178 $(obj)/%-n32.o: $(src)/%.c FORCE
>> 179 $(call cmd,force_checksrc)
>> 180 $(call if_changed_rule,cc_o_c)
>> 181
>> 182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
>> 183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
>> 184 $(call if_changed_dep,cpp_lds_S)
>> 185
>> 186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
>> 187 $(call if_changed,vdsold_and_vdso_check)
>> 188
>> 189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
>> 190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
>> 191 $(obj)/genvdso FORCE
>> 192 $(call if_changed,genvdso)
62 193
63 CPPFLAGS_vdso32/vdso32.lds = $(CPPFLAGS_vdso.l !! 194 obj-y += vdso-n32-image.o
64 VDSO_LDFLAGS_vdso32.lds = -m elf32_sparc -sona <<
65 195
66 #This makes sure the $(obj) subdirectory exist !! 196 endif
67 #is not a kbuild sub-make subdirectory <<
68 override obj-dirs = $(dir $(obj)) $(obj)/vdso3 <<
69 <<
70 targets += vdso32/vdso32.lds <<
71 targets += vdso32/vdso-note.o <<
72 targets += vdso32/vclock_gettime.o <<
73 <<
74 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD <<
75 $(obj)/vdso32.so.dbg: KBUILD_AFLAGS = $(KBUILD <<
76 $(obj)/vdso32.so.dbg: asflags-$(CONFIG_SPARC64 <<
77 <<
78 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD <<
79 KBUILD_CFLAGS_32 := $(filter-out -mcmodel=medl <<
80 KBUILD_CFLAGS_32 := $(filter-out -fno-pic,$(KB <<
81 KBUILD_CFLAGS_32 := $(filter-out $(RANDSTRUCT_ <<
82 KBUILD_CFLAGS_32 := $(filter-out $(GCC_PLUGINS <<
83 KBUILD_CFLAGS_32 := $(filter-out $(SPARC_REG_C <<
84 KBUILD_CFLAGS_32 += -m32 -msoft-float -fpic <<
85 KBUILD_CFLAGS_32 += -fno-stack-protector <<
86 KBUILD_CFLAGS_32 += $(call cc-option, -foptimi <<
87 KBUILD_CFLAGS_32 += -fno-omit-frame-pointer <<
88 KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING <<
89 KBUILD_CFLAGS_32 += -mv8plus <<
90 $(obj)/vdso32.so.dbg: KBUILD_CFLAGS = $(KBUILD <<
91 <<
92 $(obj)/vdso32.so.dbg: FORCE \ <<
93 $(obj)/vdso32/vdso32.l <<
94 $(obj)/vdso32/vclock_g <<
95 $(obj)/vdso32/vdso-not <<
96 $(call if_changed,vdso) <<
97 <<
98 # <<
99 # The DSO images are built using a special lin <<
100 # <<
101 quiet_cmd_vdso = VDSO $@ <<
102 cmd_vdso = $(LD) -nostdlib -o $@ \ <<
103 $(VDSO_LDFLAGS) $(VDSO_ <<
104 -T $(filter %.lds,$^) $ <<
105 sh $(src)/checkundef.sh '$(OBJ <<
106 197
107 VDSO_LDFLAGS = -shared --hash-style=both --bui !! 198 # FIXME: Need install rule for debug.
>> 199 # Needs to deal with dependency for generation of dbg by cmd_genvdso...
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