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-vdso32 = note.o sigtramp.o restart_syscall.o 13obj-cvdso32 = vdso32_generic.o 14 15# Build rules 16 17targets := $(obj-vdso32) $(obj-cvdso32) vdso32.so 18obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 19obj-cvdso32 := $(addprefix $(obj)/, $(obj-cvdso32)) 20 21VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE) 22CFLAGS_REMOVE_vdso32_generic.o = $(VDSO_CFLAGS_REMOVE) 23 24ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls 25# -march=1.1 -mschedule=7100LC 26ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \ 27 $(call ld-option, -Wl$(comma)--hash-style=sysv) 28asflags-y := -D__VDSO32__ -s 29 30KBUILD_AFLAGS += -DBUILD_VDSO 31KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 32 33VDSO_LIBGCC := $(shell $(CROSS32CC) -print-libgcc-file-name) 34 35obj-y += vdso32_wrapper.o 36extra-y += vdso32.lds 37CPPFLAGS_vdso32.lds += -P -C # -U$(ARCH) 38 39$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE 40 41# Force dependency (incbin is bad) 42# link rule for the .so file, .lds has to be first 43$(obj)/vdso32.so: $(obj)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE 44 $(call if_changed,vdso32ld) 45 46# assembly rules for the .S files 47$(obj-vdso32): %.o: %.S FORCE 48 $(call if_changed_dep,vdso32as) 49$(obj-cvdso32): %.o: %.c FORCE 50 $(call if_changed_dep,vdso32cc) 51 52# actual build commands 53quiet_cmd_vdso32ld = VDSO32L $@ 54 cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@ 55quiet_cmd_vdso32as = VDSO32A $@ 56 cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $< 57quiet_cmd_vdso32cc = VDSO32C $@ 58 cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -o $@ $< 59 60# Generate VDSO offsets using helper script 61gen-vdsosym := $(src)/gen_vdso_offsets.sh 62quiet_cmd_vdsosym = VDSOSYM $@ 63 cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 64 65include/generated/vdso32-offsets.h: $(obj)/vdso32.so FORCE 66 $(call if_changed,vdsosym) 67