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 4 5# Build rules 6 7targets := $(obj-vdso64) vdso64.so 8obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) 9 10EXTRA_CFLAGS := -shared -s -fno-common -fno-builtin 11EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ 12 $(call ld-option, -Wl$(comma)--hash-style=sysv) 13EXTRA_AFLAGS := -D__VDSO64__ -s 14 15obj-y += vdso64_wrapper.o 16extra-y += vdso64.lds 17CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) 18 19# Force dependency (incbin is bad) 20$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so 21 22# link rule for the .so file, .lds has to be first 23$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) 24 $(call if_changed,vdso64ld) 25 26# assembly rules for the .S files 27$(obj-vdso64): %.o: %.S 28 $(call if_changed_dep,vdso64as) 29 30# actual build commands 31quiet_cmd_vdso64ld = VDSO64L $@ 32 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ 33quiet_cmd_vdso64as = VDSO64A $@ 34 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< 35