Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
ebb5e78c AS |
2 | # Objects to go into the VDSO. |
3 | obj-vdso-y := elf.o gettimeofday.o sigreturn.o | |
4 | ||
5 | # Common compiler flags between ABIs. | |
6 | ccflags-vdso := \ | |
7 | $(filter -I%,$(KBUILD_CFLAGS)) \ | |
8 | $(filter -E%,$(KBUILD_CFLAGS)) \ | |
bb93078e | 9 | $(filter -mmicromips,$(KBUILD_CFLAGS)) \ |
ebb5e78c AS |
10 | $(filter -march=%,$(KBUILD_CFLAGS)) |
11 | cflags-vdso := $(ccflags-vdso) \ | |
12 | $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ | |
94cc36b8 MR |
13 | -O2 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \ |
14 | -DDISABLE_BRANCH_PROFILING \ | |
cfd75c2d | 15 | $(call cc-option, -fno-asynchronous-unwind-tables) \ |
ebb5e78c AS |
16 | $(call cc-option, -fno-stack-protector) |
17 | aflags-vdso := $(ccflags-vdso) \ | |
ebb5e78c AS |
18 | -D__ASSEMBLY__ -Wa,-gdwarf-2 |
19 | ||
20 | # | |
21 | # For the pre-R6 code in arch/mips/vdso/vdso.h for locating | |
22 | # the base address of VDSO, the linker will emit a R_MIPS_PC32 | |
23 | # relocation in binutils > 2.25 but it will fail with older versions | |
24 | # because that relocation is not supported for that symbol. As a result | |
25 | # of which we are forced to disable the VDSO symbols when building | |
26 | # with < 2.25 binutils on pre-R6 kernels. For more references on why we | |
27 | # can't use other methods to get the base address of VDSO please refer to | |
28 | # the comments on that file. | |
29 | # | |
30 | ifndef CONFIG_CPU_MIPSR6 | |
d5ece1cb | 31 | ifeq ($(call ld-ifversion, -lt, 225000000, y),y) |
2a037f31 | 32 | $(warning MIPS VDSO requires binutils >= 2.25) |
ebb5e78c AS |
33 | obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y)) |
34 | ccflags-vdso += -DDISABLE_MIPS_VDSO | |
35 | endif | |
36 | endif | |
37 | ||
38 | # VDSO linker flags. | |
39 | VDSO_LDFLAGS := \ | |
40 | -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \ | |
41 | -nostdlib -shared \ | |
42 | $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \ | |
43 | $(call cc-ldoption, -Wl$(comma)--build-id) | |
44 | ||
45 | GCOV_PROFILE := n | |
46 | ||
47 | # | |
48 | # Shared build commands. | |
49 | # | |
50 | ||
51 | quiet_cmd_vdsold = VDSO $@ | |
52 | cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \ | |
53 | -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ | |
54 | ||
b668970e AB |
55 | quiet_cmd_vdsoas_o_S = AS $@ |
56 | cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $< | |
57 | ||
2afb9745 JH |
58 | # Strip rule for the raw .so files |
59 | $(obj)/%.so.raw: OBJCOPYFLAGS := -S | |
60 | $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE | |
61 | $(call if_changed,objcopy) | |
62 | ||
ebb5e78c AS |
63 | hostprogs-y := genvdso |
64 | ||
65 | quiet_cmd_genvdso = GENVDSO $@ | |
66 | define cmd_genvdso | |
2afb9745 JH |
67 | $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \ |
68 | $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME) | |
ebb5e78c AS |
69 | endef |
70 | ||
71 | # | |
72 | # Build native VDSO. | |
73 | # | |
74 | ||
75 | native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS)) | |
76 | ||
77 | targets += $(obj-vdso-y) | |
2afb9745 JH |
78 | targets += vdso.lds |
79 | targets += vdso.so.dbg.raw vdso.so.raw | |
80 | targets += vdso.so.dbg vdso.so | |
81 | targets += vdso-image.c | |
ebb5e78c AS |
82 | |
83 | obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) | |
84 | ||
85 | $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi) | |
86 | $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi) | |
87 | ||
034827c7 | 88 | $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi) |
ebb5e78c | 89 | |
2afb9745 | 90 | $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE |
ebb5e78c AS |
91 | $(call if_changed,vdsold) |
92 | ||
2afb9745 JH |
93 | $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \ |
94 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
95 | $(call if_changed,genvdso) |
96 | ||
97 | obj-y += vdso-image.o | |
98 | ||
99 | # | |
100 | # Build O32 VDSO. | |
101 | # | |
102 | ||
103 | # Define these outside the ifdef to ensure they are picked up by clean. | |
104 | targets += $(obj-vdso-y:%.o=%-o32.o) | |
2afb9745 JH |
105 | targets += vdso-o32.lds |
106 | targets += vdso-o32.so.dbg.raw vdso-o32.so.raw | |
107 | targets += vdso-o32.so.dbg vdso-o32.so | |
108 | targets += vdso-o32-image.c | |
ebb5e78c AS |
109 | |
110 | ifdef CONFIG_MIPS32_O32 | |
111 | ||
112 | obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o) | |
113 | ||
114 | $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32 | |
115 | $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32 | |
116 | ||
117 | $(obj)/%-o32.o: $(src)/%.S FORCE | |
b668970e | 118 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
119 | |
120 | $(obj)/%-o32.o: $(src)/%.c FORCE | |
121 | $(call cmd,force_checksrc) | |
122 | $(call if_changed_rule,cc_o_c) | |
123 | ||
124 | $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := -mabi=32 | |
125 | $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE | |
126 | $(call if_changed_dep,cpp_lds_S) | |
127 | ||
2afb9745 | 128 | $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE |
ebb5e78c AS |
129 | $(call if_changed,vdsold) |
130 | ||
131 | $(obj)/vdso-o32-image.c: VDSO_NAME := o32 | |
2afb9745 JH |
132 | $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \ |
133 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
134 | $(call if_changed,genvdso) |
135 | ||
136 | obj-y += vdso-o32-image.o | |
137 | ||
138 | endif | |
139 | ||
140 | # | |
141 | # Build N32 VDSO. | |
142 | # | |
143 | ||
144 | targets += $(obj-vdso-y:%.o=%-n32.o) | |
2afb9745 JH |
145 | targets += vdso-n32.lds |
146 | targets += vdso-n32.so.dbg.raw vdso-n32.so.raw | |
147 | targets += vdso-n32.so.dbg vdso-n32.so | |
148 | targets += vdso-n32-image.c | |
ebb5e78c AS |
149 | |
150 | ifdef CONFIG_MIPS32_N32 | |
151 | ||
152 | obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o) | |
153 | ||
154 | $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32 | |
155 | $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32 | |
156 | ||
157 | $(obj)/%-n32.o: $(src)/%.S FORCE | |
b668970e | 158 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
159 | |
160 | $(obj)/%-n32.o: $(src)/%.c FORCE | |
161 | $(call cmd,force_checksrc) | |
162 | $(call if_changed_rule,cc_o_c) | |
163 | ||
164 | $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := -mabi=n32 | |
165 | $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE | |
166 | $(call if_changed_dep,cpp_lds_S) | |
167 | ||
2afb9745 | 168 | $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE |
ebb5e78c AS |
169 | $(call if_changed,vdsold) |
170 | ||
171 | $(obj)/vdso-n32-image.c: VDSO_NAME := n32 | |
2afb9745 JH |
172 | $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \ |
173 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
174 | $(call if_changed,genvdso) |
175 | ||
176 | obj-y += vdso-n32-image.o | |
177 | ||
178 | endif | |
179 | ||
180 | # FIXME: Need install rule for debug. | |
181 | # Needs to deal with dependency for generation of dbg by cmd_genvdso... |