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 obj-vdso-y := elf.o gettimeofday.o sigreturn.o
4 # Include the generic Makefile to check the bu <<
5 include $(srctree)/lib/vdso/Makefile <<
6 <<
7 obj-vdso-y := elf.o vgettimeofday.o sigreturn. <<
8 4
9 # Common compiler flags between ABIs. 5 # Common compiler flags between ABIs.
10 ccflags-vdso := \ 6 ccflags-vdso := \
11 $(filter -I%,$(KBUILD_CFLAGS)) \ 7 $(filter -I%,$(KBUILD_CFLAGS)) \
12 $(filter -E%,$(KBUILD_CFLAGS)) \ 8 $(filter -E%,$(KBUILD_CFLAGS)) \
13 $(filter -mmicromips,$(KBUILD_CFLAGS)) 9 $(filter -mmicromips,$(KBUILD_CFLAGS)) \
14 $(filter -march=%,$(KBUILD_CFLAGS)) \ 10 $(filter -march=%,$(KBUILD_CFLAGS)) \
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \ 11 $(filter -m%-float,$(KBUILD_CFLAGS)) \
16 $(filter -mno-loongson-%,$(KBUILD_CFLA 12 $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
17 $(CLANG_FLAGS) \ <<
18 -D__VDSO__ 13 -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 <<
26 # jump tables but does not prevent the compile <<
27 # offsets. <<
28 cflags-vdso := $(ccflags-vdso) \ 14 cflags-vdso := $(ccflags-vdso) \
29 $(filter -W%,$(filter-out -Wa$(comma)% 15 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
30 -O3 -g -fPIC -fno-strict-aliasing -fno !! 16 -O2 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
31 -mrelax-pic-calls $(call cc-option, -m !! 17 -DDISABLE_BRANCH_PROFILING \
32 -fno-stack-protector -fno-jump-tables !! 18 $(call cc-option, -fno-asynchronous-unwind-tables) \
33 $(call cc-option, -fno-asynchronous-un !! 19 $(call cc-option, -fno-stack-protector)
34 aflags-vdso := $(ccflags-vdso) \ 20 aflags-vdso := $(ccflags-vdso) \
35 -D__ASSEMBLY__ -Wa,-gdwarf-2 21 -D__ASSEMBLY__ -Wa,-gdwarf-2
36 22
37 ifneq ($(c-gettimeofday-y),) !! 23 #
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo !! 24 # For the pre-R6 code in arch/mips/vdso/vdso.h for locating
39 !! 25 # the base address of VDSO, the linker will emit a R_MIPS_PC32
40 # config-n32-o32-env.c prepares the environmen !! 26 # relocation in binutils > 2.25 but it will fail with older versions
41 # library on a 64bit kernel. !! 27 # because that relocation is not supported for that symbol. As a result
42 # Note: Needs to be included before than the g !! 28 # of which we are forced to disable the VDSO symbols when building
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c !! 29 # with < 2.25 binutils on pre-R6 kernels. For more references on why we
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c !! 30 # can't use other methods to get the base address of VDSO please refer to
45 endif !! 31 # the comments on that file.
46 !! 32 #
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR !! 33 ifndef CONFIG_CPU_MIPSR6
48 !! 34 ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
49 ifdef CONFIG_MIPS_DISABLE_VDSO !! 35 $(warning MIPS VDSO requires binutils >= 2.25)
50 obj-vdso-y := $(filter-out vgettimeofday.o, !! 36 obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
>> 37 ccflags-vdso += -DDISABLE_MIPS_VDSO
>> 38 endif
51 endif 39 endif
52 40
53 # VDSO linker flags. 41 # VDSO linker flags.
54 ldflags-y := -Bsymbolic --no-undefined -soname !! 42 VDSO_LDFLAGS := \
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared !! 43 -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \
56 -G 0 --eh-frame-hdr --hash-style=sysv !! 44 -nostdlib -shared \
57 !! 45 $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE) !! 46 $(call cc-ldoption, -Wl$(comma)--build-id)
59 !! 47
60 # Check that we don't have PIC 'jalr t9' calls !! 48 GCOV_PROFILE := n
61 quiet_cmd_vdso_mips_check = VDSOCHK $@ <<
62 cmd_vdso_mips_check = if $(OBJDUMP) --di <<
63 then (echo >&2 "$@: PIC <<
64 rm -f $@; /bin/fa <<
65 49
66 # 50 #
67 # Shared build commands. 51 # Shared build commands.
68 # 52 #
69 53
70 quiet_cmd_vdsold_and_vdso_check = LD $@ !! 54 quiet_cmd_vdsold = VDSO $@
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $ !! 55 cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
>> 56 -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
72 57
73 quiet_cmd_vdsoas_o_S = AS $@ !! 58 quiet_cmd_vdsoas_o_S = AS $@
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o 59 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
75 60
76 # Strip rule for the raw .so files 61 # Strip rule for the raw .so files
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S 62 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE 63 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
79 $(call if_changed,objcopy) 64 $(call if_changed,objcopy)
80 65
81 hostprogs := genvdso !! 66 hostprogs-y := genvdso
82 67
83 quiet_cmd_genvdso = GENVDSO $@ 68 quiet_cmd_genvdso = GENVDSO $@
84 define cmd_genvdso 69 define cmd_genvdso
85 $(foreach file,$(filter %.raw,$^),cp $ 70 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg. 71 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
87 endef 72 endef
88 73
89 # 74 #
90 # Build native VDSO. 75 # Build native VDSO.
91 # 76 #
92 77
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS 78 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
94 79
95 targets += $(obj-vdso-y) 80 targets += $(obj-vdso-y)
96 targets += vdso.lds 81 targets += vdso.lds
97 targets += vdso.so.dbg.raw vdso.so.raw 82 targets += vdso.so.dbg.raw vdso.so.raw
98 targets += vdso.so.dbg vdso.so 83 targets += vdso.so.dbg vdso.so
99 targets += vdso-image.c 84 targets += vdso-image.c
100 85
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) 86 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
102 87
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $ 88 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $ 89 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
105 90
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags- 91 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
107 92
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj- 93 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
109 $(call if_changed,vdsold_and_vdso_chec !! 94 $(call if_changed,vdsold)
110 95
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $( 96 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
112 $(obj)/genvdso FORCE 97 $(obj)/genvdso FORCE
113 $(call if_changed,genvdso) 98 $(call if_changed,genvdso)
114 99
115 obj-y += vdso-image.o 100 obj-y += vdso-image.o
116 101
117 # 102 #
118 # Build O32 VDSO. 103 # Build O32 VDSO.
119 # 104 #
120 105
121 # Define these outside the ifdef to ensure the 106 # Define these outside the ifdef to ensure they are picked up by clean.
122 targets += $(obj-vdso-y:%.o=%-o32.o) 107 targets += $(obj-vdso-y:%.o=%-o32.o)
123 targets += vdso-o32.lds 108 targets += vdso-o32.lds
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw 109 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
125 targets += vdso-o32.so.dbg vdso-o32.so 110 targets += vdso-o32.so.dbg vdso-o32.so
126 targets += vdso-o32-image.c 111 targets += vdso-o32-image.c
127 112
128 ifdef CONFIG_MIPS32_O32 113 ifdef CONFIG_MIPS32_O32
129 114
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32. 115 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
131 116
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds 117 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds 118 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
134 119
135 $(obj)/%-o32.o: $(src)/%.S FORCE 120 $(obj)/%-o32.o: $(src)/%.S FORCE
136 $(call if_changed_dep,vdsoas_o_S) 121 $(call if_changed_dep,vdsoas_o_S)
137 122
138 $(obj)/%-o32.o: $(src)/%.c FORCE 123 $(obj)/%-o32.o: $(src)/%.c FORCE
139 $(call cmd,force_checksrc) 124 $(call cmd,force_checksrc)
140 $(call if_changed_rule,cc_o_c) 125 $(call if_changed_rule,cc_o_c)
141 126
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl 127 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE 128 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
144 $(call if_changed_dep,cpp_lds_S) 129 $(call if_changed_dep,cpp_lds_S)
145 130
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld 131 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
147 $(call if_changed,vdsold_and_vdso_chec !! 132 $(call if_changed,vdsold)
148 133
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32 134 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db 135 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
151 $(obj)/genvdso FORCE 136 $(obj)/genvdso FORCE
152 $(call if_changed,genvdso) 137 $(call if_changed,genvdso)
153 138
154 obj-y += vdso-o32-image.o 139 obj-y += vdso-o32-image.o
155 140
156 endif 141 endif
157 142
158 # 143 #
159 # Build N32 VDSO. 144 # Build N32 VDSO.
160 # 145 #
161 146
162 targets += $(obj-vdso-y:%.o=%-n32.o) 147 targets += $(obj-vdso-y:%.o=%-n32.o)
163 targets += vdso-n32.lds 148 targets += vdso-n32.lds
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw 149 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
165 targets += vdso-n32.so.dbg vdso-n32.so 150 targets += vdso-n32.so.dbg vdso-n32.so
166 targets += vdso-n32-image.c 151 targets += vdso-n32-image.c
167 152
168 ifdef CONFIG_MIPS32_N32 153 ifdef CONFIG_MIPS32_N32
169 154
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32. 155 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
171 156
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds 157 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds 158 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
174 159
175 $(obj)/%-n32.o: $(src)/%.S FORCE 160 $(obj)/%-n32.o: $(src)/%.S FORCE
176 $(call if_changed_dep,vdsoas_o_S) 161 $(call if_changed_dep,vdsoas_o_S)
177 162
178 $(obj)/%-n32.o: $(src)/%.c FORCE 163 $(obj)/%-n32.o: $(src)/%.c FORCE
179 $(call cmd,force_checksrc) 164 $(call cmd,force_checksrc)
180 $(call if_changed_rule,cc_o_c) 165 $(call if_changed_rule,cc_o_c)
181 166
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl 167 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE 168 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
184 $(call if_changed_dep,cpp_lds_S) 169 $(call if_changed_dep,cpp_lds_S)
185 170
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld 171 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
187 $(call if_changed,vdsold_and_vdso_chec !! 172 $(call if_changed,vdsold)
188 173
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32 174 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db 175 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
191 $(obj)/genvdso FORCE 176 $(obj)/genvdso FORCE
192 $(call if_changed,genvdso) 177 $(call if_changed,genvdso)
193 178
194 obj-y += vdso-n32-image.o 179 obj-y += vdso-n32-image.o
195 180
196 endif 181 endif
197 182
198 # FIXME: Need install rule for debug. 183 # FIXME: Need install rule for debug.
199 # Needs to deal with dependency for generation 184 # Needs to deal with dependency for generation of dbg by cmd_genvdso...
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