1 # List of files in the vdso, has to be asm only for now
5 obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
9 targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
10 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
12 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
13 KBUILD_AFLAGS_64 += -m64 -s
15 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
16 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
17 KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
18 $(call cc-ldoption, -Wl$(comma)--hash-style=both)
20 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
21 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
23 obj-y += vdso64_wrapper.o
25 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
27 # Disable gcov profiling for VDSO code
30 # Force dependency (incbin is bad)
31 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
33 # link rule for the .so file, .lds has to be first
34 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
35 $(call if_changed,vdso64ld)
37 # strip rule for the .so file
38 $(obj)/%.so: OBJCOPYFLAGS := -S
39 $(obj)/%.so: $(obj)/%.so.dbg FORCE
40 $(call if_changed,objcopy)
42 # assembly rules for the .S files
43 $(obj-vdso64): %.o: %.S
44 $(call if_changed_dep,vdso64as)
46 # actual build commands
47 quiet_cmd_vdso64ld = VDSO64L $@
48 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
49 quiet_cmd_vdso64as = VDSO64A $@
50 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
52 # install commands for the unstripped file
53 quiet_cmd_vdso_install = INSTALL $@
54 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
56 vdso64.so: $(obj)/vdso64.so.dbg
57 @mkdir -p $(MODLIB)/vdso
58 $(call cmd,vdso_install)
60 vdso_install: vdso64.so