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Commit | Line | Data |
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ebb5e78c AS |
1 | # Objects to go into the VDSO. |
2 | obj-vdso-y := elf.o gettimeofday.o sigreturn.o | |
3 | ||
4 | # Common compiler flags between ABIs. | |
5 | ccflags-vdso := \ | |
6 | $(filter -I%,$(KBUILD_CFLAGS)) \ | |
7 | $(filter -E%,$(KBUILD_CFLAGS)) \ | |
bb93078e | 8 | $(filter -mmicromips,$(KBUILD_CFLAGS)) \ |
ebb5e78c AS |
9 | $(filter -march=%,$(KBUILD_CFLAGS)) |
10 | cflags-vdso := $(ccflags-vdso) \ | |
11 | $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ | |
94cc36b8 MR |
12 | -O2 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \ |
13 | -DDISABLE_BRANCH_PROFILING \ | |
cfd75c2d | 14 | $(call cc-option, -fno-asynchronous-unwind-tables) \ |
ebb5e78c AS |
15 | $(call cc-option, -fno-stack-protector) |
16 | aflags-vdso := $(ccflags-vdso) \ | |
ebb5e78c AS |
17 | -D__ASSEMBLY__ -Wa,-gdwarf-2 |
18 | ||
19 | # | |
20 | # For the pre-R6 code in arch/mips/vdso/vdso.h for locating | |
21 | # the base address of VDSO, the linker will emit a R_MIPS_PC32 | |
22 | # relocation in binutils > 2.25 but it will fail with older versions | |
23 | # because that relocation is not supported for that symbol. As a result | |
24 | # of which we are forced to disable the VDSO symbols when building | |
25 | # with < 2.25 binutils on pre-R6 kernels. For more references on why we | |
26 | # can't use other methods to get the base address of VDSO please refer to | |
27 | # the comments on that file. | |
28 | # | |
29 | ifndef CONFIG_CPU_MIPSR6 | |
d5ece1cb | 30 | ifeq ($(call ld-ifversion, -lt, 225000000, y),y) |
2a037f31 | 31 | $(warning MIPS VDSO requires binutils >= 2.25) |
ebb5e78c AS |
32 | obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y)) |
33 | ccflags-vdso += -DDISABLE_MIPS_VDSO | |
34 | endif | |
35 | endif | |
36 | ||
37 | # VDSO linker flags. | |
38 | VDSO_LDFLAGS := \ | |
39 | -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \ | |
40 | -nostdlib -shared \ | |
41 | $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \ | |
42 | $(call cc-ldoption, -Wl$(comma)--build-id) | |
43 | ||
44 | GCOV_PROFILE := n | |
45 | ||
46 | # | |
47 | # Shared build commands. | |
48 | # | |
49 | ||
50 | quiet_cmd_vdsold = VDSO $@ | |
51 | cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \ | |
52 | -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ | |
53 | ||
b668970e AB |
54 | quiet_cmd_vdsoas_o_S = AS $@ |
55 | cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $< | |
56 | ||
2afb9745 JH |
57 | # Strip rule for the raw .so files |
58 | $(obj)/%.so.raw: OBJCOPYFLAGS := -S | |
59 | $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE | |
60 | $(call if_changed,objcopy) | |
61 | ||
ebb5e78c AS |
62 | hostprogs-y := genvdso |
63 | ||
64 | quiet_cmd_genvdso = GENVDSO $@ | |
65 | define cmd_genvdso | |
2afb9745 JH |
66 | $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \ |
67 | $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME) | |
ebb5e78c AS |
68 | endef |
69 | ||
70 | # | |
71 | # Build native VDSO. | |
72 | # | |
73 | ||
74 | native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS)) | |
75 | ||
76 | targets += $(obj-vdso-y) | |
2afb9745 JH |
77 | targets += vdso.lds |
78 | targets += vdso.so.dbg.raw vdso.so.raw | |
79 | targets += vdso.so.dbg vdso.so | |
80 | targets += vdso-image.c | |
ebb5e78c AS |
81 | |
82 | obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) | |
83 | ||
84 | $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi) | |
85 | $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi) | |
86 | ||
034827c7 | 87 | $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi) |
ebb5e78c | 88 | |
2afb9745 | 89 | $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE |
ebb5e78c AS |
90 | $(call if_changed,vdsold) |
91 | ||
2afb9745 JH |
92 | $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \ |
93 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
94 | $(call if_changed,genvdso) |
95 | ||
96 | obj-y += vdso-image.o | |
97 | ||
98 | # | |
99 | # Build O32 VDSO. | |
100 | # | |
101 | ||
102 | # Define these outside the ifdef to ensure they are picked up by clean. | |
103 | targets += $(obj-vdso-y:%.o=%-o32.o) | |
2afb9745 JH |
104 | targets += vdso-o32.lds |
105 | targets += vdso-o32.so.dbg.raw vdso-o32.so.raw | |
106 | targets += vdso-o32.so.dbg vdso-o32.so | |
107 | targets += vdso-o32-image.c | |
ebb5e78c AS |
108 | |
109 | ifdef CONFIG_MIPS32_O32 | |
110 | ||
111 | obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o) | |
112 | ||
113 | $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32 | |
114 | $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32 | |
115 | ||
116 | $(obj)/%-o32.o: $(src)/%.S FORCE | |
b668970e | 117 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
118 | |
119 | $(obj)/%-o32.o: $(src)/%.c FORCE | |
120 | $(call cmd,force_checksrc) | |
121 | $(call if_changed_rule,cc_o_c) | |
122 | ||
123 | $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := -mabi=32 | |
124 | $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE | |
125 | $(call if_changed_dep,cpp_lds_S) | |
126 | ||
2afb9745 | 127 | $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE |
ebb5e78c AS |
128 | $(call if_changed,vdsold) |
129 | ||
130 | $(obj)/vdso-o32-image.c: VDSO_NAME := o32 | |
2afb9745 JH |
131 | $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \ |
132 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
133 | $(call if_changed,genvdso) |
134 | ||
135 | obj-y += vdso-o32-image.o | |
136 | ||
137 | endif | |
138 | ||
139 | # | |
140 | # Build N32 VDSO. | |
141 | # | |
142 | ||
143 | targets += $(obj-vdso-y:%.o=%-n32.o) | |
2afb9745 JH |
144 | targets += vdso-n32.lds |
145 | targets += vdso-n32.so.dbg.raw vdso-n32.so.raw | |
146 | targets += vdso-n32.so.dbg vdso-n32.so | |
147 | targets += vdso-n32-image.c | |
ebb5e78c AS |
148 | |
149 | ifdef CONFIG_MIPS32_N32 | |
150 | ||
151 | obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o) | |
152 | ||
153 | $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32 | |
154 | $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32 | |
155 | ||
156 | $(obj)/%-n32.o: $(src)/%.S FORCE | |
b668970e | 157 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
158 | |
159 | $(obj)/%-n32.o: $(src)/%.c FORCE | |
160 | $(call cmd,force_checksrc) | |
161 | $(call if_changed_rule,cc_o_c) | |
162 | ||
163 | $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := -mabi=n32 | |
164 | $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE | |
165 | $(call if_changed_dep,cpp_lds_S) | |
166 | ||
2afb9745 | 167 | $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE |
ebb5e78c AS |
168 | $(call if_changed,vdsold) |
169 | ||
170 | $(obj)/vdso-n32-image.c: VDSO_NAME := n32 | |
2afb9745 JH |
171 | $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \ |
172 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
173 | $(call if_changed,genvdso) |
174 | ||
175 | obj-y += vdso-n32-image.o | |
176 | ||
177 | endif | |
178 | ||
179 | # FIXME: Need install rule for debug. | |
180 | # Needs to deal with dependency for generation of dbg by cmd_genvdso... |