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 $(filter -mmicromips
,$(KBUILD_CFLAGS
)) \
9 $(filter -march
=%,$(KBUILD_CFLAGS
))
10 cflags-vdso
:= $(ccflags-vdso
) \
11 $(filter -W
%,$(filter-out -Wa
$(comma
)%,$(KBUILD_CFLAGS
))) \
12 -O2
-g
-fPIC
-fno-strict-aliasing
-fno-common
-fno-builtin
-G
0 \
13 -DDISABLE_BRANCH_PROFILING \
14 $(call cc-option
, -fno-asynchronous-unwind-tables
) \
15 $(call cc-option
, -fno-stack-protector
)
16 aflags-vdso
:= $(ccflags-vdso
) \
17 -D__ASSEMBLY__
-Wa
,-gdwarf-2
20 # For the pre-R6 code in arch/mips/vdso/vdso.h for locating
21 # the base address of VDSO, the linker will emit a R_MIPS_PC32
22 # relocation in binutils > 2.25 but it will fail with older versions
23 # because that relocation is not supported for that symbol. As a result
24 # of which we are forced to disable the VDSO symbols when building
25 # with < 2.25 binutils on pre-R6 kernels. For more references on why we
26 # can't use other methods to get the base address of VDSO please refer to
27 # the comments on that file.
29 ifndef CONFIG_CPU_MIPSR6
30 ifeq ($(call ld-ifversion
, -lt
, 225000000, y
),y
)
31 $(warning MIPS VDSO requires binutils
>= 2.25)
32 obj-vdso-y
:= $(filter-out gettimeofday.o
, $(obj-vdso-y
))
33 ccflags-vdso
+= -DDISABLE_MIPS_VDSO
39 -Wl
,-Bsymbolic
-Wl
,--no-undefined
-Wl
,-soname
=linux-vdso.so
.1 \
41 $(call cc-ldoption
, -Wl
$(comma
)--hash-style
=sysv
) \
42 $(call cc-ldoption
, -Wl
$(comma
)--build-id
)
47 # Shared build commands.
50 quiet_cmd_vdsold
= VDSO
$@
51 cmd_vdsold
= $(CC
) $(c_flags
) $(VDSO_LDFLAGS
) \
52 -Wl
,-T
$(filter %.lds
,$^
) $(filter %.o
,$^
) -o
$@
54 quiet_cmd_vdsoas_o_S
= AS
$@
55 cmd_vdsoas_o_S
= $(CC
) $(a_flags
) -c
-o
$@
$<
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
)
62 hostprogs-y
:= genvdso
64 quiet_cmd_genvdso
= GENVDSO
$@
66 $(foreach file
,$(filter %.raw
,$^
),cp
$(file
) $(file
:%.raw
=%) &&) \
67 $(obj
)/genvdso
$(<:%.raw
=%) $(<:%.dbg.raw
=%) $@
$(VDSO_NAME
)
74 native-abi
:= $(filter -mabi
=%,$(KBUILD_CFLAGS
))
76 targets
+= $(obj-vdso-y
)
78 targets
+= vdso.so.dbg.raw vdso.so.raw
79 targets
+= vdso.so.dbg vdso.so
80 targets
+= vdso-image.c
82 obj-vdso
:= $(obj-vdso-y
:%.o
=$(obj
)/%.o
)
84 $(obj-vdso
): KBUILD_CFLAGS
:= $(cflags-vdso
) $(native-abi
)
85 $(obj-vdso
): KBUILD_AFLAGS
:= $(aflags-vdso
) $(native-abi
)
87 $(obj
)/vdso.lds
: KBUILD_CPPFLAGS
:= $(ccflags-vdso
) $(native-abi
)
89 $(obj
)/vdso.so.dbg.raw
: $(obj
)/vdso.lds
$(obj-vdso
) FORCE
90 $(call if_changed
,vdsold
)
92 $(obj
)/vdso-image.c
: $(obj
)/vdso.so.dbg.raw
$(obj
)/vdso.so.raw \
94 $(call if_changed
,genvdso
)
102 # Define these outside the ifdef to ensure they are picked up by clean.
103 targets
+= $(obj-vdso-y
:%.o
=%-o32.o
)
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
109 ifdef CONFIG_MIPS32_O32
111 obj-vdso-o32
:= $(obj-vdso-y
:%.o
=$(obj
)/%-o32.o
)
113 $(obj-vdso-o32
): KBUILD_CFLAGS
:= $(cflags-vdso
) -mabi
=32
114 $(obj-vdso-o32
): KBUILD_AFLAGS
:= $(aflags-vdso
) -mabi
=32
116 $(obj
)/%-o32.o
: $(src
)/%.S FORCE
117 $(call if_changed_dep
,vdsoas_o_S
)
119 $(obj
)/%-o32.o
: $(src
)/%.c FORCE
120 $(call cmd
,force_checksrc
)
121 $(call if_changed_rule
,cc_o_c
)
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
)
127 $(obj
)/vdso-o32.so.dbg.raw
: $(obj
)/vdso-o32.lds
$(obj-vdso-o32
) FORCE
128 $(call if_changed
,vdsold
)
130 $(obj
)/vdso-o32-image.c
: VDSO_NAME
:= o32
131 $(obj
)/vdso-o32-image.c
: $(obj
)/vdso-o32.so.dbg.raw
$(obj
)/vdso-o32.so.raw \
133 $(call if_changed
,genvdso
)
135 obj-y
+= vdso-o32-image.o
143 targets
+= $(obj-vdso-y
:%.o
=%-n32.o
)
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
149 ifdef CONFIG_MIPS32_N32
151 obj-vdso-n32
:= $(obj-vdso-y
:%.o
=$(obj
)/%-n32.o
)
153 $(obj-vdso-n32
): KBUILD_CFLAGS
:= $(cflags-vdso
) -mabi
=n32
154 $(obj-vdso-n32
): KBUILD_AFLAGS
:= $(aflags-vdso
) -mabi
=n32
156 $(obj
)/%-n32.o
: $(src
)/%.S FORCE
157 $(call if_changed_dep
,vdsoas_o_S
)
159 $(obj
)/%-n32.o
: $(src
)/%.c FORCE
160 $(call cmd
,force_checksrc
)
161 $(call if_changed_rule
,cc_o_c
)
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
)
167 $(obj
)/vdso-n32.so.dbg.raw
: $(obj
)/vdso-n32.lds
$(obj-vdso-n32
) FORCE
168 $(call if_changed
,vdsold
)
170 $(obj
)/vdso-n32-image.c
: VDSO_NAME
:= n32
171 $(obj
)/vdso-n32-image.c
: $(obj
)/vdso-n32.so.dbg.raw
$(obj
)/vdso-n32.so.raw \
173 $(call if_changed
,genvdso
)
175 obj-y
+= vdso-n32-image.o
179 # FIXME: Need install rule for debug.
180 # Needs to deal with dependency for generation of dbg by cmd_genvdso...