1# Include the generic Makefile to check the built vdso. 2include $(srctree)/lib/vdso/Makefile 3 4KCOV_INSTRUMENT := n 5 6# Disable gcov profiling, ubsan and kasan for VDSO code 7GCOV_PROFILE := n 8UBSAN_SANITIZE := n 9KASAN_SANITIZE := n 10KCSAN_SANITIZE := n 11 12obj-vdso64 = note.o sigtramp.o restart_syscall.o 13obj-cvdso64 = vdso64_generic.o 14 15# Build rules 16 17targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so 18obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) 19obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64)) 20 21VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE) 22CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE) 23 24ccflags-y := -shared -fno-common -fno-builtin 25ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ 26 $(call ld-option, -Wl$(comma)--hash-style=sysv) 27asflags-y := -D__VDSO64__ -s 28 29KBUILD_AFLAGS += -DBUILD_VDSO 30KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 31 32VDSO_LIBGCC := $(shell $(CC) -print-libgcc-file-name) 33 34obj-y += vdso64_wrapper.o 35extra-y += vdso64.lds 36CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) 37 38$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE 39 40# Force dependency (incbin is bad) 41# link rule for the .so file, .lds has to be first 42$(obj)/vdso64.so: $(obj)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) $(VDSO_LIBGCC) FORCE 43 $(call if_changed,vdso64ld) 44 45# assembly rules for the .S files 46$(obj-vdso64): %.o: %.S FORCE 47 $(call if_changed_dep,vdso64as) 48$(obj-cvdso64): %.o: %.c FORCE 49 $(call if_changed_dep,vdso64cc) 50 51# actual build commands 52quiet_cmd_vdso64ld = VDSO64L $@ 53 cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@ 54quiet_cmd_vdso64as = VDSO64A $@ 55 cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< 56quiet_cmd_vdso64cc = VDSO64C $@ 57 cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $< 58 59# Generate VDSO offsets using helper script 60gen-vdsosym := $(src)/gen_vdso_offsets.sh 61quiet_cmd_vdsosym = VDSOSYM $@ 62 cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 63 64include/generated/vdso64-offsets.h: $(obj)/vdso64.so FORCE 65 $(call if_changed,vdsosym) 66