1# List of files in the vdso, has to be asm only for now 2 3obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o 4 5# Build rules 6 7targets := $(obj-vdso64) vdso64.so vdso64.so.dbg 8obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) 9 10GCOV_PROFILE := n 11 12ccflags-y := -shared -fno-common -fno-builtin 13ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ 14 $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) 15asflags-y := -D__VDSO64__ -s 16 17obj-y += vdso64_wrapper.o 18extra-y += vdso64.lds 19CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) 20 21# Force dependency (incbin is bad) 22$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so 23 24# link rule for the .so file, .lds has to be first 25$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) 26 $(call if_changed,vdso64ld) 27 28# strip rule for the .so file 29$(obj)/%.so: OBJCOPYFLAGS := -S 30$(obj)/%.so: $(obj)/%.so.dbg FORCE 31 $(call if_changed,objcopy) 32 33# assembly rules for the .S files 34$(obj-vdso64): %.o: %.S 35 $(call if_changed_dep,vdso64as) 36 37# actual build commands 38quiet_cmd_vdso64ld = VDSO64L $@ 39 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ 40quiet_cmd_vdso64as = VDSO64A $@ 41 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< 42 43# install commands for the unstripped file 44quiet_cmd_vdso_install = INSTALL $@ 45 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 46 47vdso64.so: $(obj)/vdso64.so.dbg 48 @mkdir -p $(MODLIB)/vdso 49 $(call cmd,vdso_install) 50 51vdso_install: vdso64.so 52