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