1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # Objects to go into the VDSO. 2 # Objects to go into the VDSO.
3 3
>> 4 # Sanitizer runtimes are unavailable and cannot be linked here.
>> 5 KCSAN_SANITIZE := n
>> 6
4 # Include the generic Makefile to check the bu 7 # Include the generic Makefile to check the built vdso.
5 include $(srctree)/lib/vdso/Makefile 8 include $(srctree)/lib/vdso/Makefile
6 9
7 obj-vdso-y := elf.o vgettimeofday.o sigreturn. 10 obj-vdso-y := elf.o vgettimeofday.o sigreturn.o
8 11
9 # Common compiler flags between ABIs. 12 # Common compiler flags between ABIs.
10 ccflags-vdso := \ 13 ccflags-vdso := \
11 $(filter -I%,$(KBUILD_CFLAGS)) \ 14 $(filter -I%,$(KBUILD_CFLAGS)) \
12 $(filter -E%,$(KBUILD_CFLAGS)) \ 15 $(filter -E%,$(KBUILD_CFLAGS)) \
13 $(filter -mmicromips,$(KBUILD_CFLAGS)) 16 $(filter -mmicromips,$(KBUILD_CFLAGS)) \
14 $(filter -march=%,$(KBUILD_CFLAGS)) \ 17 $(filter -march=%,$(KBUILD_CFLAGS)) \
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \ 18 $(filter -m%-float,$(KBUILD_CFLAGS)) \
16 $(filter -mno-loongson-%,$(KBUILD_CFLA 19 $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
17 $(CLANG_FLAGS) \ 20 $(CLANG_FLAGS) \
18 -D__VDSO__ 21 -D__VDSO__
19 22
20 ifndef CONFIG_64BIT 23 ifndef CONFIG_64BIT
21 ccflags-vdso += -DBUILD_VDSO32 24 ccflags-vdso += -DBUILD_VDSO32
22 endif 25 endif
23 26
24 # 27 #
25 # The -fno-jump-tables flag only prevents the 28 # The -fno-jump-tables flag only prevents the compiler from generating
26 # jump tables but does not prevent the compile 29 # jump tables but does not prevent the compiler from emitting absolute
27 # offsets. 30 # offsets.
28 cflags-vdso := $(ccflags-vdso) \ 31 cflags-vdso := $(ccflags-vdso) \
29 $(filter -W%,$(filter-out -Wa$(comma)% 32 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
30 -O3 -g -fPIC -fno-strict-aliasing -fno 33 -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
31 -mrelax-pic-calls $(call cc-option, -m 34 -mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
32 -fno-stack-protector -fno-jump-tables 35 -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
33 $(call cc-option, -fno-asynchronous-un 36 $(call cc-option, -fno-asynchronous-unwind-tables)
34 aflags-vdso := $(ccflags-vdso) \ 37 aflags-vdso := $(ccflags-vdso) \
35 -D__ASSEMBLY__ -Wa,-gdwarf-2 38 -D__ASSEMBLY__ -Wa,-gdwarf-2
36 39
37 ifneq ($(c-gettimeofday-y),) 40 ifneq ($(c-gettimeofday-y),)
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo 41 CFLAGS_vgettimeofday.o = -include $(c-gettimeofday-y)
39 42
40 # config-n32-o32-env.c prepares the environmen 43 # config-n32-o32-env.c prepares the environment to build a 32bit vDSO
41 # library on a 64bit kernel. 44 # library on a 64bit kernel.
42 # Note: Needs to be included before than the g 45 # Note: Needs to be included before than the generic library.
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c !! 46 CFLAGS_vgettimeofday-o32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c !! 47 CFLAGS_vgettimeofday-n32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
45 endif 48 endif
46 49
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR 50 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
48 51
49 ifdef CONFIG_MIPS_DISABLE_VDSO 52 ifdef CONFIG_MIPS_DISABLE_VDSO
50 obj-vdso-y := $(filter-out vgettimeofday.o, 53 obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y))
51 endif 54 endif
52 55
53 # VDSO linker flags. 56 # VDSO linker flags.
54 ldflags-y := -Bsymbolic --no-undefined -soname 57 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared 58 $(filter -E%,$(KBUILD_CFLAGS)) -shared \
56 -G 0 --eh-frame-hdr --hash-style=sysv 59 -G 0 --eh-frame-hdr --hash-style=sysv --build-id=sha1 -T
57 60
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE) 61 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE)
>> 62
>> 63 GCOV_PROFILE := n
>> 64 UBSAN_SANITIZE := n
>> 65 KCOV_INSTRUMENT := n
59 66
60 # Check that we don't have PIC 'jalr t9' calls 67 # Check that we don't have PIC 'jalr t9' calls left
61 quiet_cmd_vdso_mips_check = VDSOCHK $@ 68 quiet_cmd_vdso_mips_check = VDSOCHK $@
62 cmd_vdso_mips_check = if $(OBJDUMP) --di 69 cmd_vdso_mips_check = if $(OBJDUMP) --disassemble $@ | grep -E -h "jalr.*t9" > /dev/null; \
63 then (echo >&2 "$@: PIC 70 then (echo >&2 "$@: PIC 'jalr t9' calls are not supported"; \
64 rm -f $@; /bin/fa 71 rm -f $@; /bin/false); fi
65 72
66 # 73 #
67 # Shared build commands. 74 # Shared build commands.
68 # 75 #
69 76
70 quiet_cmd_vdsold_and_vdso_check = LD $@ 77 quiet_cmd_vdsold_and_vdso_check = LD $@
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $ 78 cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check); $(cmd_vdso_mips_check)
72 79
73 quiet_cmd_vdsoas_o_S = AS $@ 80 quiet_cmd_vdsoas_o_S = AS $@
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o 81 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
75 82
76 # Strip rule for the raw .so files 83 # Strip rule for the raw .so files
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S 84 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE 85 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
79 $(call if_changed,objcopy) 86 $(call if_changed,objcopy)
80 87
81 hostprogs := genvdso 88 hostprogs := genvdso
82 89
83 quiet_cmd_genvdso = GENVDSO $@ 90 quiet_cmd_genvdso = GENVDSO $@
84 define cmd_genvdso 91 define cmd_genvdso
85 $(foreach file,$(filter %.raw,$^),cp $ 92 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg. 93 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
87 endef 94 endef
88 95
89 # 96 #
90 # Build native VDSO. 97 # Build native VDSO.
91 # 98 #
92 99
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS 100 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
94 101
95 targets += $(obj-vdso-y) 102 targets += $(obj-vdso-y)
96 targets += vdso.lds 103 targets += vdso.lds
97 targets += vdso.so.dbg.raw vdso.so.raw 104 targets += vdso.so.dbg.raw vdso.so.raw
98 targets += vdso.so.dbg vdso.so 105 targets += vdso.so.dbg vdso.so
99 targets += vdso-image.c 106 targets += vdso-image.c
100 107
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) 108 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
102 109
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $ 110 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $ 111 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
105 112
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags- 113 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
107 114
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj- 115 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
109 $(call if_changed,vdsold_and_vdso_chec 116 $(call if_changed,vdsold_and_vdso_check)
110 117
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $( 118 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
112 $(obj)/genvdso FORCE 119 $(obj)/genvdso FORCE
113 $(call if_changed,genvdso) 120 $(call if_changed,genvdso)
114 121
115 obj-y += vdso-image.o 122 obj-y += vdso-image.o
116 123
117 # 124 #
118 # Build O32 VDSO. 125 # Build O32 VDSO.
119 # 126 #
120 127
121 # Define these outside the ifdef to ensure the 128 # Define these outside the ifdef to ensure they are picked up by clean.
122 targets += $(obj-vdso-y:%.o=%-o32.o) 129 targets += $(obj-vdso-y:%.o=%-o32.o)
123 targets += vdso-o32.lds 130 targets += vdso-o32.lds
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw 131 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
125 targets += vdso-o32.so.dbg vdso-o32.so 132 targets += vdso-o32.so.dbg vdso-o32.so
126 targets += vdso-o32-image.c 133 targets += vdso-o32-image.c
127 134
128 ifdef CONFIG_MIPS32_O32 135 ifdef CONFIG_MIPS32_O32
129 136
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32. 137 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
131 138
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds 139 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds 140 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
134 141
135 $(obj)/%-o32.o: $(src)/%.S FORCE 142 $(obj)/%-o32.o: $(src)/%.S FORCE
136 $(call if_changed_dep,vdsoas_o_S) 143 $(call if_changed_dep,vdsoas_o_S)
137 144
138 $(obj)/%-o32.o: $(src)/%.c FORCE 145 $(obj)/%-o32.o: $(src)/%.c FORCE
139 $(call cmd,force_checksrc) 146 $(call cmd,force_checksrc)
140 $(call if_changed_rule,cc_o_c) 147 $(call if_changed_rule,cc_o_c)
141 148
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl 149 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE 150 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
144 $(call if_changed_dep,cpp_lds_S) 151 $(call if_changed_dep,cpp_lds_S)
145 152
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld 153 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
147 $(call if_changed,vdsold_and_vdso_chec 154 $(call if_changed,vdsold_and_vdso_check)
148 155
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32 156 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db 157 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
151 $(obj)/genvdso FORCE 158 $(obj)/genvdso FORCE
152 $(call if_changed,genvdso) 159 $(call if_changed,genvdso)
153 160
154 obj-y += vdso-o32-image.o 161 obj-y += vdso-o32-image.o
155 162
156 endif 163 endif
157 164
158 # 165 #
159 # Build N32 VDSO. 166 # Build N32 VDSO.
160 # 167 #
161 168
162 targets += $(obj-vdso-y:%.o=%-n32.o) 169 targets += $(obj-vdso-y:%.o=%-n32.o)
163 targets += vdso-n32.lds 170 targets += vdso-n32.lds
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw 171 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
165 targets += vdso-n32.so.dbg vdso-n32.so 172 targets += vdso-n32.so.dbg vdso-n32.so
166 targets += vdso-n32-image.c 173 targets += vdso-n32-image.c
167 174
168 ifdef CONFIG_MIPS32_N32 175 ifdef CONFIG_MIPS32_N32
169 176
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32. 177 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
171 178
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds 179 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds 180 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
174 181
175 $(obj)/%-n32.o: $(src)/%.S FORCE 182 $(obj)/%-n32.o: $(src)/%.S FORCE
176 $(call if_changed_dep,vdsoas_o_S) 183 $(call if_changed_dep,vdsoas_o_S)
177 184
178 $(obj)/%-n32.o: $(src)/%.c FORCE 185 $(obj)/%-n32.o: $(src)/%.c FORCE
179 $(call cmd,force_checksrc) 186 $(call cmd,force_checksrc)
180 $(call if_changed_rule,cc_o_c) 187 $(call if_changed_rule,cc_o_c)
181 188
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl 189 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE 190 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
184 $(call if_changed_dep,cpp_lds_S) 191 $(call if_changed_dep,cpp_lds_S)
185 192
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld 193 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
187 $(call if_changed,vdsold_and_vdso_chec 194 $(call if_changed,vdsold_and_vdso_check)
188 195
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32 196 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db 197 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
191 $(obj)/genvdso FORCE 198 $(obj)/genvdso FORCE
192 $(call if_changed,genvdso) 199 $(call if_changed,genvdso)
193 200
194 obj-y += vdso-n32-image.o 201 obj-y += vdso-n32-image.o
195 202
196 endif 203 endif
197 204
198 # FIXME: Need install rule for debug. 205 # FIXME: Need install rule for debug.
199 # Needs to deal with dependency for generation 206 # Needs to deal with dependency for generation of dbg by cmd_genvdso...
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