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 # Include the generic Makefile to check the bu !! 4 # Sanitizer runtimes are unavailable and cannot be linked here.
>> 5 KCSAN_SANITIZE := n
>> 6
>> 7 # Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
>> 8 # the inclusion of generic Makefile.
>> 9 ARCH_REL_TYPE_ABS := R_MIPS_JUMP_SLOT|R_MIPS_GLOB_DAT
5 include $(srctree)/lib/vdso/Makefile 10 include $(srctree)/lib/vdso/Makefile
6 11
7 obj-vdso-y := elf.o vgettimeofday.o sigreturn. 12 obj-vdso-y := elf.o vgettimeofday.o sigreturn.o
8 13
9 # Common compiler flags between ABIs. 14 # Common compiler flags between ABIs.
10 ccflags-vdso := \ 15 ccflags-vdso := \
11 $(filter -I%,$(KBUILD_CFLAGS)) \ 16 $(filter -I%,$(KBUILD_CFLAGS)) \
12 $(filter -E%,$(KBUILD_CFLAGS)) \ 17 $(filter -E%,$(KBUILD_CFLAGS)) \
13 $(filter -mmicromips,$(KBUILD_CFLAGS)) 18 $(filter -mmicromips,$(KBUILD_CFLAGS)) \
14 $(filter -march=%,$(KBUILD_CFLAGS)) \ 19 $(filter -march=%,$(KBUILD_CFLAGS)) \
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \ 20 $(filter -m%-float,$(KBUILD_CFLAGS)) \
16 $(filter -mno-loongson-%,$(KBUILD_CFLA 21 $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
17 $(CLANG_FLAGS) \ 22 $(CLANG_FLAGS) \
18 -D__VDSO__ 23 -D__VDSO__
19 24
20 ifndef CONFIG_64BIT 25 ifndef CONFIG_64BIT
21 ccflags-vdso += -DBUILD_VDSO32 26 ccflags-vdso += -DBUILD_VDSO32
22 endif 27 endif
23 28
24 # 29 #
25 # The -fno-jump-tables flag only prevents the 30 # The -fno-jump-tables flag only prevents the compiler from generating
26 # jump tables but does not prevent the compile 31 # jump tables but does not prevent the compiler from emitting absolute
27 # offsets. 32 # offsets.
28 cflags-vdso := $(ccflags-vdso) \ 33 cflags-vdso := $(ccflags-vdso) \
29 $(filter -W%,$(filter-out -Wa$(comma)% 34 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
30 -O3 -g -fPIC -fno-strict-aliasing -fno 35 -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
31 -mrelax-pic-calls $(call cc-option, -m 36 -mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
32 -fno-stack-protector -fno-jump-tables 37 -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
33 $(call cc-option, -fno-asynchronous-un 38 $(call cc-option, -fno-asynchronous-unwind-tables)
34 aflags-vdso := $(ccflags-vdso) \ 39 aflags-vdso := $(ccflags-vdso) \
35 -D__ASSEMBLY__ -Wa,-gdwarf-2 40 -D__ASSEMBLY__ -Wa,-gdwarf-2
36 41
37 ifneq ($(c-gettimeofday-y),) 42 ifneq ($(c-gettimeofday-y),)
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo 43 CFLAGS_vgettimeofday.o = -include $(c-gettimeofday-y)
39 44
40 # config-n32-o32-env.c prepares the environmen 45 # config-n32-o32-env.c prepares the environment to build a 32bit vDSO
41 # library on a 64bit kernel. 46 # library on a 64bit kernel.
42 # Note: Needs to be included before than the g 47 # Note: Needs to be included before than the generic library.
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c !! 48 CFLAGS_vgettimeofday-o32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c !! 49 CFLAGS_vgettimeofday-n32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y)
45 endif 50 endif
46 51
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR 52 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
48 53
49 ifdef CONFIG_MIPS_DISABLE_VDSO 54 ifdef CONFIG_MIPS_DISABLE_VDSO
>> 55 ifndef CONFIG_MIPS_LD_CAN_LINK_VDSO
>> 56 $(warning MIPS VDSO requires binutils >= 2.25)
>> 57 endif
50 obj-vdso-y := $(filter-out vgettimeofday.o, 58 obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y))
51 endif 59 endif
52 60
53 # VDSO linker flags. 61 # VDSO linker flags.
54 ldflags-y := -Bsymbolic --no-undefined -soname 62 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared 63 $(filter -E%,$(KBUILD_CFLAGS)) -shared \
56 -G 0 --eh-frame-hdr --hash-style=sysv 64 -G 0 --eh-frame-hdr --hash-style=sysv --build-id=sha1 -T
57 65
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE) 66 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE)
59 67
>> 68 GCOV_PROFILE := n
>> 69 UBSAN_SANITIZE := n
>> 70 KCOV_INSTRUMENT := n
>> 71
60 # Check that we don't have PIC 'jalr t9' calls 72 # Check that we don't have PIC 'jalr t9' calls left
61 quiet_cmd_vdso_mips_check = VDSOCHK $@ 73 quiet_cmd_vdso_mips_check = VDSOCHK $@
62 cmd_vdso_mips_check = if $(OBJDUMP) --di !! 74 cmd_vdso_mips_check = if $(OBJDUMP) --disassemble $@ | egrep -h "jalr.*t9" > /dev/null; \
63 then (echo >&2 "$@: PIC 75 then (echo >&2 "$@: PIC 'jalr t9' calls are not supported"; \
64 rm -f $@; /bin/fa 76 rm -f $@; /bin/false); fi
65 77
66 # 78 #
67 # Shared build commands. 79 # Shared build commands.
68 # 80 #
69 81
70 quiet_cmd_vdsold_and_vdso_check = LD $@ 82 quiet_cmd_vdsold_and_vdso_check = LD $@
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $ 83 cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check); $(cmd_vdso_mips_check)
72 84
73 quiet_cmd_vdsoas_o_S = AS $@ 85 quiet_cmd_vdsoas_o_S = AS $@
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o 86 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
75 87
76 # Strip rule for the raw .so files 88 # Strip rule for the raw .so files
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S 89 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE 90 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
79 $(call if_changed,objcopy) 91 $(call if_changed,objcopy)
80 92
81 hostprogs := genvdso 93 hostprogs := genvdso
82 94
83 quiet_cmd_genvdso = GENVDSO $@ 95 quiet_cmd_genvdso = GENVDSO $@
84 define cmd_genvdso 96 define cmd_genvdso
85 $(foreach file,$(filter %.raw,$^),cp $ 97 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg. 98 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
87 endef 99 endef
88 100
89 # 101 #
90 # Build native VDSO. 102 # Build native VDSO.
91 # 103 #
92 104
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS 105 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
94 106
95 targets += $(obj-vdso-y) 107 targets += $(obj-vdso-y)
96 targets += vdso.lds 108 targets += vdso.lds
97 targets += vdso.so.dbg.raw vdso.so.raw 109 targets += vdso.so.dbg.raw vdso.so.raw
98 targets += vdso.so.dbg vdso.so 110 targets += vdso.so.dbg vdso.so
99 targets += vdso-image.c 111 targets += vdso-image.c
100 112
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) 113 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
102 114
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $ 115 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $ 116 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
105 117
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags- 118 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
107 119
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj- 120 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
109 $(call if_changed,vdsold_and_vdso_chec 121 $(call if_changed,vdsold_and_vdso_check)
110 122
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $( 123 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
112 $(obj)/genvdso FORCE 124 $(obj)/genvdso FORCE
113 $(call if_changed,genvdso) 125 $(call if_changed,genvdso)
114 126
115 obj-y += vdso-image.o 127 obj-y += vdso-image.o
116 128
117 # 129 #
118 # Build O32 VDSO. 130 # Build O32 VDSO.
119 # 131 #
120 132
121 # Define these outside the ifdef to ensure the 133 # Define these outside the ifdef to ensure they are picked up by clean.
122 targets += $(obj-vdso-y:%.o=%-o32.o) 134 targets += $(obj-vdso-y:%.o=%-o32.o)
123 targets += vdso-o32.lds 135 targets += vdso-o32.lds
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw 136 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
125 targets += vdso-o32.so.dbg vdso-o32.so 137 targets += vdso-o32.so.dbg vdso-o32.so
126 targets += vdso-o32-image.c 138 targets += vdso-o32-image.c
127 139
128 ifdef CONFIG_MIPS32_O32 140 ifdef CONFIG_MIPS32_O32
129 141
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32. 142 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
131 143
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds 144 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds 145 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
134 146
135 $(obj)/%-o32.o: $(src)/%.S FORCE 147 $(obj)/%-o32.o: $(src)/%.S FORCE
136 $(call if_changed_dep,vdsoas_o_S) 148 $(call if_changed_dep,vdsoas_o_S)
137 149
138 $(obj)/%-o32.o: $(src)/%.c FORCE 150 $(obj)/%-o32.o: $(src)/%.c FORCE
139 $(call cmd,force_checksrc) 151 $(call cmd,force_checksrc)
140 $(call if_changed_rule,cc_o_c) 152 $(call if_changed_rule,cc_o_c)
141 153
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl 154 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE 155 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
144 $(call if_changed_dep,cpp_lds_S) 156 $(call if_changed_dep,cpp_lds_S)
145 157
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld 158 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
147 $(call if_changed,vdsold_and_vdso_chec 159 $(call if_changed,vdsold_and_vdso_check)
148 160
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32 161 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db 162 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
151 $(obj)/genvdso FORCE 163 $(obj)/genvdso FORCE
152 $(call if_changed,genvdso) 164 $(call if_changed,genvdso)
153 165
154 obj-y += vdso-o32-image.o 166 obj-y += vdso-o32-image.o
155 167
156 endif 168 endif
157 169
158 # 170 #
159 # Build N32 VDSO. 171 # Build N32 VDSO.
160 # 172 #
161 173
162 targets += $(obj-vdso-y:%.o=%-n32.o) 174 targets += $(obj-vdso-y:%.o=%-n32.o)
163 targets += vdso-n32.lds 175 targets += vdso-n32.lds
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw 176 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
165 targets += vdso-n32.so.dbg vdso-n32.so 177 targets += vdso-n32.so.dbg vdso-n32.so
166 targets += vdso-n32-image.c 178 targets += vdso-n32-image.c
167 179
168 ifdef CONFIG_MIPS32_N32 180 ifdef CONFIG_MIPS32_N32
169 181
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32. 182 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
171 183
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds 184 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds 185 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
174 186
175 $(obj)/%-n32.o: $(src)/%.S FORCE 187 $(obj)/%-n32.o: $(src)/%.S FORCE
176 $(call if_changed_dep,vdsoas_o_S) 188 $(call if_changed_dep,vdsoas_o_S)
177 189
178 $(obj)/%-n32.o: $(src)/%.c FORCE 190 $(obj)/%-n32.o: $(src)/%.c FORCE
179 $(call cmd,force_checksrc) 191 $(call cmd,force_checksrc)
180 $(call if_changed_rule,cc_o_c) 192 $(call if_changed_rule,cc_o_c)
181 193
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl 194 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE 195 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
184 $(call if_changed_dep,cpp_lds_S) 196 $(call if_changed_dep,cpp_lds_S)
185 197
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld 198 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
187 $(call if_changed,vdsold_and_vdso_chec 199 $(call if_changed,vdsold_and_vdso_check)
188 200
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32 201 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db 202 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
191 $(obj)/genvdso FORCE 203 $(obj)/genvdso FORCE
192 $(call if_changed,genvdso) 204 $(call if_changed,genvdso)
193 205
194 obj-y += vdso-n32-image.o 206 obj-y += vdso-n32-image.o
195 207
196 endif 208 endif
197 209
198 # FIXME: Need install rule for debug. 210 # FIXME: Need install rule for debug.
199 # Needs to deal with dependency for generation 211 # Needs to deal with dependency for generation of dbg by cmd_genvdso...
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