Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
ebb5e78c | 2 | # Objects to go into the VDSO. |
24640f23 VF |
3 | |
4 | # Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before | |
5 | # the inclusion of generic Makefile. | |
6 | ARCH_REL_TYPE_ABS := R_MIPS_JUMP_SLOT|R_MIPS_GLOB_DAT | |
7 | include $(srctree)/lib/vdso/Makefile | |
8 | ||
9 | obj-vdso-y := elf.o vgettimeofday.o sigreturn.o | |
ebb5e78c AS |
10 | |
11 | # Common compiler flags between ABIs. | |
12 | ccflags-vdso := \ | |
13 | $(filter -I%,$(KBUILD_CFLAGS)) \ | |
14 | $(filter -E%,$(KBUILD_CFLAGS)) \ | |
bb93078e | 15 | $(filter -mmicromips,$(KBUILD_CFLAGS)) \ |
351fdddd | 16 | $(filter -march=%,$(KBUILD_CFLAGS)) \ |
0648e50e | 17 | $(filter -m%-float,$(KBUILD_CFLAGS)) \ |
2f2b4fd6 | 18 | $(filter -mno-loongson-%,$(KBUILD_CFLAGS)) \ |
351fdddd | 19 | -D__VDSO__ |
ee67855e | 20 | |
99570c3d TG |
21 | ifndef CONFIG_64BIT |
22 | ccflags-vdso += -DBUILD_VDSO32 | |
23 | endif | |
24 | ||
076f421d | 25 | ifdef CONFIG_CC_IS_CLANG |
ee67855e PB |
26 | ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS)) |
27 | endif | |
28 | ||
24640f23 VF |
29 | # |
30 | # The -fno-jump-tables flag only prevents the compiler from generating | |
31 | # jump tables but does not prevent the compiler from emitting absolute | |
32 | # offsets. | |
ebb5e78c AS |
33 | cflags-vdso := $(ccflags-vdso) \ |
34 | $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ | |
24640f23 | 35 | -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \ |
d3f703c4 | 36 | -mrelax-pic-calls -mexplicit-relocs \ |
24640f23 | 37 | -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \ |
cfd75c2d | 38 | $(call cc-option, -fno-asynchronous-unwind-tables) \ |
ebb5e78c AS |
39 | $(call cc-option, -fno-stack-protector) |
40 | aflags-vdso := $(ccflags-vdso) \ | |
ebb5e78c AS |
41 | -D__ASSEMBLY__ -Wa,-gdwarf-2 |
42 | ||
24640f23 VF |
43 | ifneq ($(c-gettimeofday-y),) |
44 | CFLAGS_vgettimeofday.o = -include $(c-gettimeofday-y) | |
45 | ||
46 | # config-n32-o32-env.c prepares the environment to build a 32bit vDSO | |
47 | # library on a 64bit kernel. | |
48 | # Note: Needs to be included before than the generic library. | |
b4c0f7fa VF |
49 | CFLAGS_vgettimeofday-o32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y) |
50 | CFLAGS_vgettimeofday-n32.o = -include $(srctree)/$(src)/config-n32-o32-env.c -include $(c-gettimeofday-y) | |
24640f23 VF |
51 | endif |
52 | ||
53 | CFLAGS_REMOVE_vgettimeofday.o = -pg | |
54 | ||
ebb5e78c AS |
55 | # |
56 | # For the pre-R6 code in arch/mips/vdso/vdso.h for locating | |
57 | # the base address of VDSO, the linker will emit a R_MIPS_PC32 | |
58 | # relocation in binutils > 2.25 but it will fail with older versions | |
59 | # because that relocation is not supported for that symbol. As a result | |
60 | # of which we are forced to disable the VDSO symbols when building | |
61 | # with < 2.25 binutils on pre-R6 kernels. For more references on why we | |
62 | # can't use other methods to get the base address of VDSO please refer to | |
63 | # the comments on that file. | |
64 | # | |
65 | ifndef CONFIG_CPU_MIPSR6 | |
d5ece1cb | 66 | ifeq ($(call ld-ifversion, -lt, 225000000, y),y) |
2a037f31 | 67 | $(warning MIPS VDSO requires binutils >= 2.25) |
8919975b | 68 | obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y)) |
ebb5e78c AS |
69 | ccflags-vdso += -DDISABLE_MIPS_VDSO |
70 | endif | |
71 | endif | |
72 | ||
73 | # VDSO linker flags. | |
74 | VDSO_LDFLAGS := \ | |
75 | -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \ | |
2f002567 | 76 | $(addprefix -Wl$(comma),$(filter -E%,$(KBUILD_CFLAGS))) \ |
1e022137 | 77 | -nostdlib -shared -Wl,--hash-style=sysv -Wl,--build-id |
ebb5e78c | 78 | |
24640f23 VF |
79 | CFLAGS_REMOVE_vdso.o = -pg |
80 | ||
ebb5e78c | 81 | GCOV_PROFILE := n |
1e35918a | 82 | UBSAN_SANITIZE := n |
dcf78ee6 | 83 | KCOV_INSTRUMENT := n |
ebb5e78c AS |
84 | |
85 | # | |
86 | # Shared build commands. | |
87 | # | |
88 | ||
cdab7e2c VF |
89 | quiet_cmd_vdsold_and_vdso_check = LD $@ |
90 | cmd_vdsold_and_vdso_check = $(cmd_vdsold); $(cmd_vdso_check) | |
91 | ||
ebb5e78c AS |
92 | quiet_cmd_vdsold = VDSO $@ |
93 | cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \ | |
94 | -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@ | |
95 | ||
cdab7e2c | 96 | quiet_cmd_vdsoas_o_S = AS $@ |
b668970e AB |
97 | cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $< |
98 | ||
2afb9745 JH |
99 | # Strip rule for the raw .so files |
100 | $(obj)/%.so.raw: OBJCOPYFLAGS := -S | |
101 | $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE | |
102 | $(call if_changed,objcopy) | |
103 | ||
5f2fb52f | 104 | hostprogs := genvdso |
ebb5e78c AS |
105 | |
106 | quiet_cmd_genvdso = GENVDSO $@ | |
107 | define cmd_genvdso | |
2afb9745 JH |
108 | $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \ |
109 | $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME) | |
ebb5e78c AS |
110 | endef |
111 | ||
112 | # | |
113 | # Build native VDSO. | |
114 | # | |
115 | ||
116 | native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS)) | |
117 | ||
118 | targets += $(obj-vdso-y) | |
2afb9745 JH |
119 | targets += vdso.lds |
120 | targets += vdso.so.dbg.raw vdso.so.raw | |
121 | targets += vdso.so.dbg vdso.so | |
122 | targets += vdso-image.c | |
ebb5e78c AS |
123 | |
124 | obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o) | |
125 | ||
126 | $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi) | |
127 | $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi) | |
128 | ||
034827c7 | 129 | $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi) |
ebb5e78c | 130 | |
2afb9745 | 131 | $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE |
cdab7e2c | 132 | $(call if_changed,vdsold_and_vdso_check) |
ebb5e78c | 133 | |
2afb9745 JH |
134 | $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \ |
135 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
136 | $(call if_changed,genvdso) |
137 | ||
138 | obj-y += vdso-image.o | |
139 | ||
140 | # | |
141 | # Build O32 VDSO. | |
142 | # | |
143 | ||
144 | # Define these outside the ifdef to ensure they are picked up by clean. | |
145 | targets += $(obj-vdso-y:%.o=%-o32.o) | |
2afb9745 JH |
146 | targets += vdso-o32.lds |
147 | targets += vdso-o32.so.dbg.raw vdso-o32.so.raw | |
148 | targets += vdso-o32.so.dbg vdso-o32.so | |
149 | targets += vdso-o32-image.c | |
ebb5e78c AS |
150 | |
151 | ifdef CONFIG_MIPS32_O32 | |
152 | ||
153 | obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o) | |
154 | ||
155 | $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32 | |
156 | $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32 | |
157 | ||
158 | $(obj)/%-o32.o: $(src)/%.S FORCE | |
b668970e | 159 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
160 | |
161 | $(obj)/%-o32.o: $(src)/%.c FORCE | |
162 | $(call cmd,force_checksrc) | |
163 | $(call if_changed_rule,cc_o_c) | |
164 | ||
67fc5dc8 | 165 | $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=32 |
ebb5e78c AS |
166 | $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE |
167 | $(call if_changed_dep,cpp_lds_S) | |
168 | ||
2afb9745 | 169 | $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE |
cdab7e2c | 170 | $(call if_changed,vdsold_and_vdso_check) |
ebb5e78c AS |
171 | |
172 | $(obj)/vdso-o32-image.c: VDSO_NAME := o32 | |
2afb9745 JH |
173 | $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \ |
174 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
175 | $(call if_changed,genvdso) |
176 | ||
177 | obj-y += vdso-o32-image.o | |
178 | ||
179 | endif | |
180 | ||
181 | # | |
182 | # Build N32 VDSO. | |
183 | # | |
184 | ||
185 | targets += $(obj-vdso-y:%.o=%-n32.o) | |
2afb9745 JH |
186 | targets += vdso-n32.lds |
187 | targets += vdso-n32.so.dbg.raw vdso-n32.so.raw | |
188 | targets += vdso-n32.so.dbg vdso-n32.so | |
189 | targets += vdso-n32-image.c | |
ebb5e78c AS |
190 | |
191 | ifdef CONFIG_MIPS32_N32 | |
192 | ||
193 | obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o) | |
194 | ||
195 | $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32 | |
196 | $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32 | |
197 | ||
198 | $(obj)/%-n32.o: $(src)/%.S FORCE | |
b668970e | 199 | $(call if_changed_dep,vdsoas_o_S) |
ebb5e78c AS |
200 | |
201 | $(obj)/%-n32.o: $(src)/%.c FORCE | |
202 | $(call cmd,force_checksrc) | |
203 | $(call if_changed_rule,cc_o_c) | |
204 | ||
67fc5dc8 | 205 | $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) -mabi=n32 |
ebb5e78c AS |
206 | $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE |
207 | $(call if_changed_dep,cpp_lds_S) | |
208 | ||
2afb9745 | 209 | $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE |
cdab7e2c | 210 | $(call if_changed,vdsold_and_vdso_check) |
ebb5e78c AS |
211 | |
212 | $(obj)/vdso-n32-image.c: VDSO_NAME := n32 | |
2afb9745 JH |
213 | $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \ |
214 | $(obj)/genvdso FORCE | |
ebb5e78c AS |
215 | $(call if_changed,genvdso) |
216 | ||
217 | obj-y += vdso-n32-image.o | |
218 | ||
219 | endif | |
220 | ||
221 | # FIXME: Need install rule for debug. | |
222 | # Needs to deal with dependency for generation of dbg by cmd_genvdso... |