1 # Objects to go into the VDSO.
2 obj-vdso-y := elf.o gettimeofday.o sigreturn.o
4 # Common compiler flags between ABIs.
6 $(filter -I%,$(KBUILD_CFLAGS)) \
7 $(filter -E%,$(KBUILD_CFLAGS)) \
8 $(filter -march=%,$(KBUILD_CFLAGS))
9 cflags-vdso := $(ccflags-vdso) \
10 $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
11 -O2 -g -fPIC -fno-common -fno-builtin -G 0 -DDISABLE_BRANCH_PROFILING \
12 $(call cc-option, -fno-stack-protector)
13 aflags-vdso := $(ccflags-vdso) \
14 $(filter -I%,$(KBUILD_CFLAGS)) \
15 $(filter -E%,$(KBUILD_CFLAGS)) \
16 -D__ASSEMBLY__ -Wa,-gdwarf-2
19 # For the pre-R6 code in arch/mips/vdso/vdso.h for locating
20 # the base address of VDSO, the linker will emit a R_MIPS_PC32
21 # relocation in binutils > 2.25 but it will fail with older versions
22 # because that relocation is not supported for that symbol. As a result
23 # of which we are forced to disable the VDSO symbols when building
24 # with < 2.25 binutils on pre-R6 kernels. For more references on why we
25 # can't use other methods to get the base address of VDSO please refer to
26 # the comments on that file.
28 ifndef CONFIG_CPU_MIPSR6
29 ifeq ($(call ld-ifversion, -lt, 225000000, y),y)
30 $(warning MIPS VDSO requires binutils >= 2.25)
31 obj-vdso-y := $(filter-out gettimeofday.o, $(obj-vdso-y))
32 ccflags-vdso += -DDISABLE_MIPS_VDSO
38 -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1 \
40 $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) \
41 $(call cc-ldoption, -Wl$(comma)--build-id)
46 # Shared build commands.
49 quiet_cmd_vdsold = VDSO $@
50 cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
51 -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
53 # Strip rule for the raw .so files
54 $(obj)/%.so.raw: OBJCOPYFLAGS := -S
55 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
56 $(call if_changed,objcopy)
58 hostprogs-y := genvdso
60 quiet_cmd_genvdso = GENVDSO $@
62 $(foreach file,$(filter %.raw,$^),cp $(file) $(file:%.raw=%) &&) \
63 $(obj)/genvdso $(<:%.raw=%) $(<:%.dbg.raw=%) $@ $(VDSO_NAME)
70 native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
72 targets += $(obj-vdso-y)
74 targets += vdso.so.dbg.raw vdso.so.raw
75 targets += vdso.so.dbg vdso.so
76 targets += vdso-image.c
78 obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
80 $(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
81 $(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
83 $(obj)/vdso.lds: KBUILD_CPPFLAGS := $(native-abi)
85 $(obj)/vdso.so.dbg.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
86 $(call if_changed,vdsold)
88 $(obj)/vdso-image.c: $(obj)/vdso.so.dbg.raw $(obj)/vdso.so.raw \
90 $(call if_changed,genvdso)
98 # Define these outside the ifdef to ensure they are picked up by clean.
99 targets += $(obj-vdso-y:%.o=%-o32.o)
100 targets += vdso-o32.lds
101 targets += vdso-o32.so.dbg.raw vdso-o32.so.raw
102 targets += vdso-o32.so.dbg vdso-o32.so
103 targets += vdso-o32-image.c
105 ifdef CONFIG_MIPS32_O32
107 obj-vdso-o32 := $(obj-vdso-y:%.o=$(obj)/%-o32.o)
109 $(obj-vdso-o32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=32
110 $(obj-vdso-o32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=32
112 $(obj)/%-o32.o: $(src)/%.S FORCE
113 $(call if_changed_dep,as_o_S)
115 $(obj)/%-o32.o: $(src)/%.c FORCE
116 $(call cmd,force_checksrc)
117 $(call if_changed_rule,cc_o_c)
119 $(obj)/vdso-o32.lds: KBUILD_CPPFLAGS := -mabi=32
120 $(obj)/vdso-o32.lds: $(src)/vdso.lds.S FORCE
121 $(call if_changed_dep,cpp_lds_S)
123 $(obj)/vdso-o32.so.dbg.raw: $(obj)/vdso-o32.lds $(obj-vdso-o32) FORCE
124 $(call if_changed,vdsold)
126 $(obj)/vdso-o32-image.c: VDSO_NAME := o32
127 $(obj)/vdso-o32-image.c: $(obj)/vdso-o32.so.dbg.raw $(obj)/vdso-o32.so.raw \
129 $(call if_changed,genvdso)
131 obj-y += vdso-o32-image.o
139 targets += $(obj-vdso-y:%.o=%-n32.o)
140 targets += vdso-n32.lds
141 targets += vdso-n32.so.dbg.raw vdso-n32.so.raw
142 targets += vdso-n32.so.dbg vdso-n32.so
143 targets += vdso-n32-image.c
145 ifdef CONFIG_MIPS32_N32
147 obj-vdso-n32 := $(obj-vdso-y:%.o=$(obj)/%-n32.o)
149 $(obj-vdso-n32): KBUILD_CFLAGS := $(cflags-vdso) -mabi=n32
150 $(obj-vdso-n32): KBUILD_AFLAGS := $(aflags-vdso) -mabi=n32
152 $(obj)/%-n32.o: $(src)/%.S FORCE
153 $(call if_changed_dep,as_o_S)
155 $(obj)/%-n32.o: $(src)/%.c FORCE
156 $(call cmd,force_checksrc)
157 $(call if_changed_rule,cc_o_c)
159 $(obj)/vdso-n32.lds: KBUILD_CPPFLAGS := -mabi=n32
160 $(obj)/vdso-n32.lds: $(src)/vdso.lds.S FORCE
161 $(call if_changed_dep,cpp_lds_S)
163 $(obj)/vdso-n32.so.dbg.raw: $(obj)/vdso-n32.lds $(obj-vdso-n32) FORCE
164 $(call if_changed,vdsold)
166 $(obj)/vdso-n32-image.c: VDSO_NAME := n32
167 $(obj)/vdso-n32-image.c: $(obj)/vdso-n32.so.dbg.raw $(obj)/vdso-n32.so.raw \
169 $(call if_changed,genvdso)
171 obj-y += vdso-n32-image.o
175 # FIXME: Need install rule for debug.
176 # Needs to deal with dependency for generation of dbg by cmd_genvdso...