1# List of files in the vdso, has to be asm only for now 2 3obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o 4 5# Build rules 6 7targets := $(obj-vdso64) vdso64.so vdso64.so.dbg 8obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) 9 10KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS)) 11KBUILD_AFLAGS_64 += -m64 -s 12 13KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS)) 14KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin 15KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ 16 $(call cc-ldoption, -Wl$(comma)--hash-style=both) 17 18$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64) 19$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64) 20 21obj-y += vdso64_wrapper.o 22extra-y += vdso64.lds 23CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) 24 25# Disable gcov profiling for VDSO code 26GCOV_PROFILE := n 27 28# Force dependency (incbin is bad) 29$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so 30 31# link rule for the .so file, .lds has to be first 32$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) 33 $(call if_changed,vdso64ld) 34 35# strip rule for the .so file 36$(obj)/%.so: OBJCOPYFLAGS := -S 37$(obj)/%.so: $(obj)/%.so.dbg FORCE 38 $(call if_changed,objcopy) 39 40# assembly rules for the .S files 41$(obj-vdso64): %.o: %.S 42 $(call if_changed_dep,vdso64as) 43 44# actual build commands 45quiet_cmd_vdso64ld = VDSO64L $@ 46 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ 47quiet_cmd_vdso64as = VDSO64A $@ 48 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< 49 50# install commands for the unstripped file 51quiet_cmd_vdso_install = INSTALL $@ 52 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 53 54vdso64.so: $(obj)/vdso64.so.dbg 55 @mkdir -p $(MODLIB)/vdso 56 $(call cmd,vdso_install) 57 58vdso_install: vdso64.so 59