1 # SPDX-License-Identifier: GPL-2.0 <<
2 # Objects to go into the VDSO. 1 # Objects to go into the VDSO.
3 !! 2 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 3
9 # Common compiler flags between ABIs. 4 # Common compiler flags between ABIs.
10 ccflags-vdso := \ 5 ccflags-vdso := \
11 $(filter -I%,$(KBUILD_CFLAGS)) \ 6 $(filter -I%,$(KBUILD_CFLAGS)) \
12 $(filter -E%,$(KBUILD_CFLAGS)) \ 7 $(filter -E%,$(KBUILD_CFLAGS)) \
13 $(filter -mmicromips,$(KBUILD_CFLAGS)) 8 $(filter -mmicromips,$(KBUILD_CFLAGS)) \
14 $(filter -march=%,$(KBUILD_CFLAGS)) \ 9 $(filter -march=%,$(KBUILD_CFLAGS)) \
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \ 10 $(filter -m%-float,$(KBUILD_CFLAGS)) \
16 $(filter -mno-loongson-%,$(KBUILD_CFLA 11 $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \
17 $(CLANG_FLAGS) \ <<
18 -D__VDSO__ 12 -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) \ 13 cflags-vdso := $(ccflags-vdso) \
29 $(filter -W%,$(filter-out -Wa$(comma)% 14 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
30 -O3 -g -fPIC -fno-strict-aliasing -fno !! 15 -O2 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
31 -mrelax-pic-calls $(call cc-option, -m !! 16 -DDISABLE_BRANCH_PROFILING \
32 -fno-stack-protector -fno-jump-tables !! 17 $(call cc-option, -fno-stack-protector)
33 $(call cc-option, -fno-asynchronous-un <<
34 aflags-vdso := $(ccflags-vdso) \ 18 aflags-vdso := $(ccflags-vdso) \
35 -D__ASSEMBLY__ -Wa,-gdwarf-2 19 -D__ASSEMBLY__ -Wa,-gdwarf-2
36 20
37 ifneq ($(c-gettimeofday-y),) !! 21 #
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo !! 22 # For the pre-R6 code in arch/mips/vdso/vdso.h for locating
39 !! 23 # the base address of VDSO, the linker will emit a R_MIPS_PC32
40 # config-n32-o32-env.c prepares the environmen !! 24 # relocation in binutils > 2.25 but it will fail with older versions
41 # library on a 64bit kernel. !! 25 # because that relocation is not supported for that symbol. As a result
42 # Note: Needs to be included before than the g !! 26 # of which we are forced to disable the VDSO symbols when building
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c !! 27 # with < 2.25 binutils on pre-R6 kernels. For more references on why we
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c !! 28 # can't use other methods to get the base address of VDSO please refer to
45 endif !! 29 # the comments on that file.
46 !! 30 #
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR !! 31 ifndef CONFIG_CPU_MIPSR6
48 !! 32 ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
49 ifdef CONFIG_MIPS_DISABLE_VDSO !! 33 $(warning MIPS VDSO requires binutils >= 2.25)
50 obj-vdso-y := $(filter-out vgettimeofday.o, !! 34 obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
>> 35 ccflags-vdso += -DDISABLE_MIPS_VDSO
>> 36 endif
51 endif 37 endif
52 38
53 # VDSO linker flags. 39 # VDSO linker flags.
54 ldflags-y := -Bsymbolic --no-undefined -soname !! 40 VDSO_LDFLAGS := \
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared !! 41 -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \
56 -G 0 --eh-frame-hdr --hash-style=sysv !! 42 -nostdlib -shared \
57 !! 43 $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE) !! 44 $(call cc-ldoption, -Wl$(comma)--build-id)
59 !! 45
60 # Check that we don't have PIC 'jalr t9' calls !! 46 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 47
66 # 48 #
67 # Shared build commands. 49 # Shared build commands.
68 # 50 #
69 51
70 quiet_cmd_vdsold_and_vdso_check = LD $@ !! 52 quiet_cmd_vdsold = VDSO $@
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $ !! 53 cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
72 !! 54 -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
73 quiet_cmd_vdsoas_o_S = AS $@ <<
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o <<
75 55
76 # Strip rule for the raw .so files 56 # Strip rule for the raw .so files
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S 57 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE 58 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
79 $(call if_changed,objcopy) 59 $(call if_changed,objcopy)
80 60
81 hostprogs := genvdso !! 61 hostprogs-y := genvdso
82 62
83 quiet_cmd_genvdso = GENVDSO $@ 63 quiet_cmd_genvdso = GENVDSO $@
84 define cmd_genvdso 64 define cmd_genvdso
85 $(foreach file,$(filter %.raw,$^),cp $ 65 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg. 66 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
87 endef 67 endef
88 68
89 # 69 #
90 # Build native VDSO. 70 # Build native VDSO.
91 # 71 #
92 72
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS 73 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
94 74
95 targets += $(obj-vdso-y) 75 targets += $(obj-vdso-y)
96 targets += vdso.lds 76 targets += vdso.lds
97 targets += vdso.so.dbg.raw vdso.so.raw 77 targets += vdso.so.dbg.raw vdso.so.raw
98 targets += vdso.so.dbg vdso.so 78 targets += vdso.so.dbg vdso.so
99 targets += vdso-image.c 79 targets += vdso-image.c
100 80
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) 81 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
102 82
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $ 83 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $ 84 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
105 85
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags- 86 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
107 87
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj- 88 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
109 $(call if_changed,vdsold_and_vdso_chec !! 89 $(call if_changed,vdsold)
110 90
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $( 91 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
112 $(obj)/genvdso FORCE 92 $(obj)/genvdso FORCE
113 $(call if_changed,genvdso) 93 $(call if_changed,genvdso)
114 94
115 obj-y += vdso-image.o 95 obj-y += vdso-image.o
116 96
117 # 97 #
118 # Build O32 VDSO. 98 # Build O32 VDSO.
119 # 99 #
120 100
121 # Define these outside the ifdef to ensure the 101 # Define these outside the ifdef to ensure they are picked up by clean.
122 targets += $(obj-vdso-y:%.o=%-o32.o) 102 targets += $(obj-vdso-y:%.o=%-o32.o)
123 targets += vdso-o32.lds 103 targets += vdso-o32.lds
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw 104 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
125 targets += vdso-o32.so.dbg vdso-o32.so 105 targets += vdso-o32.so.dbg vdso-o32.so
126 targets += vdso-o32-image.c 106 targets += vdso-o32-image.c
127 107
128 ifdef CONFIG_MIPS32_O32 108 ifdef CONFIG_MIPS32_O32
129 109
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32. 110 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
131 111
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds 112 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds 113 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
134 114
135 $(obj)/%-o32.o: $(src)/%.S FORCE 115 $(obj)/%-o32.o: $(src)/%.S FORCE
136 $(call if_changed_dep,vdsoas_o_S) !! 116 $(call if_changed_dep,as_o_S)
137 117
138 $(obj)/%-o32.o: $(src)/%.c FORCE 118 $(obj)/%-o32.o: $(src)/%.c FORCE
139 $(call cmd,force_checksrc) 119 $(call cmd,force_checksrc)
140 $(call if_changed_rule,cc_o_c) 120 $(call if_changed_rule,cc_o_c)
141 121
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl 122 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE 123 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
144 $(call if_changed_dep,cpp_lds_S) 124 $(call if_changed_dep,cpp_lds_S)
145 125
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld 126 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
147 $(call if_changed,vdsold_and_vdso_chec !! 127 $(call if_changed,vdsold)
148 128
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32 129 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db 130 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
151 $(obj)/genvdso FORCE 131 $(obj)/genvdso FORCE
152 $(call if_changed,genvdso) 132 $(call if_changed,genvdso)
153 133
154 obj-y += vdso-o32-image.o 134 obj-y += vdso-o32-image.o
155 135
156 endif 136 endif
157 137
158 # 138 #
159 # Build N32 VDSO. 139 # Build N32 VDSO.
160 # 140 #
161 141
162 targets += $(obj-vdso-y:%.o=%-n32.o) 142 targets += $(obj-vdso-y:%.o=%-n32.o)
163 targets += vdso-n32.lds 143 targets += vdso-n32.lds
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw 144 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
165 targets += vdso-n32.so.dbg vdso-n32.so 145 targets += vdso-n32.so.dbg vdso-n32.so
166 targets += vdso-n32-image.c 146 targets += vdso-n32-image.c
167 147
168 ifdef CONFIG_MIPS32_N32 148 ifdef CONFIG_MIPS32_N32
169 149
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32. 150 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
171 151
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds 152 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds 153 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
174 154
175 $(obj)/%-n32.o: $(src)/%.S FORCE 155 $(obj)/%-n32.o: $(src)/%.S FORCE
176 $(call if_changed_dep,vdsoas_o_S) !! 156 $(call if_changed_dep,as_o_S)
177 157
178 $(obj)/%-n32.o: $(src)/%.c FORCE 158 $(obj)/%-n32.o: $(src)/%.c FORCE
179 $(call cmd,force_checksrc) 159 $(call cmd,force_checksrc)
180 $(call if_changed_rule,cc_o_c) 160 $(call if_changed_rule,cc_o_c)
181 161
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl 162 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE 163 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
184 $(call if_changed_dep,cpp_lds_S) 164 $(call if_changed_dep,cpp_lds_S)
185 165
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld 166 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
187 $(call if_changed,vdsold_and_vdso_chec !! 167 $(call if_changed,vdsold)
188 168
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32 169 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db 170 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
191 $(obj)/genvdso FORCE 171 $(obj)/genvdso FORCE
192 $(call if_changed,genvdso) 172 $(call if_changed,genvdso)
193 173
194 obj-y += vdso-n32-image.o 174 obj-y += vdso-n32-image.o
195 175
196 endif 176 endif
197 177
198 # FIXME: Need install rule for debug. 178 # FIXME: Need install rule for debug.
199 # Needs to deal with dependency for generation 179 # Needs to deal with dependency for generation of dbg by cmd_genvdso...
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