1 # List of files in the vdso, has to be asm only for now
3 obj-vdso64
= gettimeofday.o clock_getres.o clock_gettime.o note.o
7 targets
:= $(obj-vdso64
) vdso64.so vdso64.so.dbg
8 obj-vdso64
:= $(addprefix $(obj
)/, $(obj-vdso64
))
10 KBUILD_AFLAGS_64
:= $(filter-out -m64
,$(KBUILD_AFLAGS
))
11 KBUILD_AFLAGS_64
+= -m64
-s
13 KBUILD_CFLAGS_64
:= $(filter-out -m64
,$(KBUILD_CFLAGS
))
14 KBUILD_CFLAGS_64
+= -m64
-fPIC
-shared
-fno-common
-fno-builtin
15 KBUILD_CFLAGS_64
+= -nostdlib
-Wl
,-soname
=linux-vdso64.so
.1 \
16 $(call cc-ldoption
, -Wl
$(comma
)--hash-style
=sysv
)
18 $(targets
:%=$(obj
)/%.dbg
): KBUILD_CFLAGS
= $(KBUILD_CFLAGS_64
)
19 $(targets
:%=$(obj
)/%.dbg
): KBUILD_AFLAGS
= $(KBUILD_AFLAGS_64
)
21 obj-y
+= vdso64_wrapper.o
23 CPPFLAGS_vdso64.lds
+= -P
-C
-U
$(ARCH
)
25 # Disable gcov profiling for VDSO code
28 # Force dependency (incbin is bad)
29 $(obj
)/vdso64_wrapper.o
: $(obj
)/vdso64.so
31 # link rule for the .so file, .lds has to be first
32 $(obj
)/vdso64.so.dbg
: $(src
)/vdso64.lds
$(obj-vdso64
)
33 $(call if_changed
,vdso64ld
)
35 # strip rule for the .so file
36 $(obj
)/%.so
: OBJCOPYFLAGS
:= -S
37 $(obj
)/%.so
: $(obj
)/%.so.dbg FORCE
38 $(call if_changed
,objcopy
)
40 # assembly rules for the .S files
41 $(obj-vdso64
): %.o
: %.S
42 $(call if_changed_dep
,vdso64as
)
44 # actual build commands
45 quiet_cmd_vdso64ld
= VDSO64L
$@
46 cmd_vdso64ld
= $(CC
) $(c_flags
) -Wl
,-T
$^
-o
$@
47 quiet_cmd_vdso64as
= VDSO64A
$@
48 cmd_vdso64as
= $(CC
) $(a_flags
) -c
-o
$@
$<
50 # install commands for the unstripped file
51 quiet_cmd_vdso_install
= INSTALL
$@
52 cmd_vdso_install
= cp
$(obj
)/$@.dbg
$(MODLIB
)/vdso
/$@
54 vdso64.so
: $(obj
)/vdso64.so.dbg
55 @mkdir
-p
$(MODLIB
)/vdso
56 $(call cmd
,vdso_install
)
58 vdso_install
: vdso64.so
