1 # SPDX-License-Identifier: GPL-2.0
2 # Objects to go into the VDSO.
3
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
9 # Common compiler flags between ABIs.
10 ccflags-vdso := \
11 $(filter -I%,$(KBUILD_CFLAGS)) \
12 $(filter -E%,$(KBUILD_CFLAGS)) \
13 $(filter -mmicromips,$(KBUILD_CFLAGS))
14 $(filter -march=%,$(KBUILD_CFLAGS)) \
15 $(filter -m%-float,$(KBUILD_CFLAGS)) \
16 $(filter -mno-loongson-%,$(KBUILD_CFLA
17 $(CLANG_FLAGS) \
18 -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) \
29 $(filter -W%,$(filter-out -Wa$(comma)%
30 -O3 -g -fPIC -fno-strict-aliasing -fno
31 -mrelax-pic-calls $(call cc-option, -m
32 -fno-stack-protector -fno-jump-tables
33 $(call cc-option, -fno-asynchronous-un
34 aflags-vdso := $(ccflags-vdso) \
35 -D__ASSEMBLY__ -Wa,-gdwarf-2
36
37 ifneq ($(c-gettimeofday-y),)
38 CFLAGS_vgettimeofday.o = -include $(c-gettimeo
39
40 # config-n32-o32-env.c prepares the environmen
41 # library on a 64bit kernel.
42 # Note: Needs to be included before than the g
43 CFLAGS_vgettimeofday-o32.o = -include $(src)/c
44 CFLAGS_vgettimeofday-n32.o = -include $(src)/c
45 endif
46
47 CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTR
48
49 ifdef CONFIG_MIPS_DISABLE_VDSO
50 obj-vdso-y := $(filter-out vgettimeofday.o,
51 endif
52
53 # VDSO linker flags.
54 ldflags-y := -Bsymbolic --no-undefined -soname
55 $(filter -E%,$(KBUILD_CFLAGS)) -shared
56 -G 0 --eh-frame-hdr --hash-style=sysv
57
58 CFLAGS_REMOVE_vdso.o = $(CC_FLAGS_FTRACE)
59
60 # Check that we don't have PIC 'jalr t9' calls
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
66 #
67 # Shared build commands.
68 #
69
70 quiet_cmd_vdsold_and_vdso_check = LD $@
71 cmd_vdsold_and_vdso_check = $(cmd_ld); $
72
73 quiet_cmd_vdsoas_o_S = AS $@
74 cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o
75
76 # Strip rule for the raw .so files
77 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
78 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
79 $(call if_changed,objcopy)
80
81 hostprogs := genvdso
82
83 quiet_cmd_genvdso = GENVDSO $@
84 define cmd_genvdso
85 $(foreach file,$(filter %.raw,$^),cp $
86 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.
87 endef
88
89 #
90 # Build native VDSO.
91 #
92
93 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS
94
95 targets += $(obj-vdso-y)
96 targets += vdso.lds
97 targets += vdso.so.dbg.raw vdso.so.raw
98 targets += vdso.so.dbg vdso.so
99 targets += vdso-image.c
100
101 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
102
103 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $
104 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $
105
106 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-
107
108 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-
109 $(call if_changed,vdsold_and_vdso_chec
110
111 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(
112 $(obj)/genvdso FORCE
113 $(call if_changed,genvdso)
114
115 obj-y += vdso-image.o
116
117 #
118 # Build O32 VDSO.
119 #
120
121 # Define these outside the ifdef to ensure the
122 targets += $(obj-vdso-y:%.o=%-o32.o)
123 targets += vdso-o32.lds
124 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
125 targets += vdso-o32.so.dbg vdso-o32.so
126 targets += vdso-o32-image.c
127
128 ifdef CONFIG_MIPS32_O32
129
130 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.
131
132 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vds
133 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vds
134
135 $(obj)/%-o32.o: $(src)/%.S FORCE
136 $(call if_changed_dep,vdsoas_o_S)
137
138 $(obj)/%-o32.o: $(src)/%.c FORCE
139 $(call cmd,force_checksrc)
140 $(call if_changed_rule,cc_o_c)
141
142 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccfl
143 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
144 $(call if_changed_dep,cpp_lds_S)
145
146 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.ld
147 $(call if_changed,vdsold_and_vdso_chec
148
149 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
150 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.db
151 $(obj)/genvdso FORCE
152 $(call if_changed,genvdso)
153
154 obj-y += vdso-o32-image.o
155
156 endif
157
158 #
159 # Build N32 VDSO.
160 #
161
162 targets += $(obj-vdso-y:%.o=%-n32.o)
163 targets += vdso-n32.lds
164 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
165 targets += vdso-n32.so.dbg vdso-n32.so
166 targets += vdso-n32-image.c
167
168 ifdef CONFIG_MIPS32_N32
169
170 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.
171
172 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vds
173 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vds
174
175 $(obj)/%-n32.o: $(src)/%.S FORCE
176 $(call if_changed_dep,vdsoas_o_S)
177
178 $(obj)/%-n32.o: $(src)/%.c FORCE
179 $(call cmd,force_checksrc)
180 $(call if_changed_rule,cc_o_c)
181
182 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccfl
183 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
184 $(call if_changed_dep,cpp_lds_S)
185
186 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.ld
187 $(call if_changed,vdsold_and_vdso_chec
188
189 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
190 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.db
191 $(obj)/genvdso FORCE
192 $(call if_changed,genvdso)
193
194 obj-y += vdso-n32-image.o
195
196 endif
197
198 # FIXME: Need install rule for debug.
199 # Needs to deal with dependency for generation
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