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, ubsan and kasan for VDSO code
32 # Force dependency (incbin is bad)
33 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
35 # link rule for the .so file, .lds has to be first
36 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
37 $(call if_changed,vdso64ld)
39 # strip rule for the .so file
40 $(obj)/%.so: OBJCOPYFLAGS := -S
41 $(obj)/%.so: $(obj)/%.so.dbg FORCE
42 $(call if_changed,objcopy)
44 # assembly rules for the .S files
45 $(obj-vdso64): %.o: %.S FORCE
46 $(call if_changed_dep,vdso64as)
48 # actual build commands
49 quiet_cmd_vdso64ld = VDSO64L $@
50 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
51 quiet_cmd_vdso64as = VDSO64A $@
52 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
54 # install commands for the unstripped file
55 quiet_cmd_vdso_install = INSTALL $@
56 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
58 vdso64.so: $(obj)/vdso64.so.dbg
59 @mkdir -p $(MODLIB)/vdso
60 $(call cmd,vdso_install)
62 vdso_install: vdso64.so