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