1# List of files in the vdso, has to be asm only for now 2 3KCOV_INSTRUMENT := n 4 5obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o 6 7# Build rules 8 9targets := $(obj-vdso32) vdso32.so vdso32.so.dbg 10obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 11 12KBUILD_AFLAGS_31 := $(filter-out -m64,$(KBUILD_AFLAGS)) 13KBUILD_AFLAGS_31 += -m31 -s 14 15KBUILD_CFLAGS_31 := $(filter-out -m64,$(KBUILD_CFLAGS)) 16KBUILD_CFLAGS_31 += -m31 -fPIC -shared -fno-common -fno-builtin 17KBUILD_CFLAGS_31 += -nostdlib -Wl,-soname=linux-vdso32.so.1 \ 18 $(call cc-ldoption, -Wl$(comma)--hash-style=both) 19 20$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_31) 21$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_31) 22 23obj-y += vdso32_wrapper.o 24extra-y += vdso32.lds 25CPPFLAGS_vdso32.lds += -P -C -U$(ARCH) 26 27# Disable gcov profiling and ubsan for VDSO code 28GCOV_PROFILE := n 29UBSAN_SANITIZE := n 30 31# Force dependency (incbin is bad) 32$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so 33 34# link rule for the .so file, .lds has to be first 35$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) 36 $(call if_changed,vdso32ld) 37 38# strip rule for the .so file 39$(obj)/%.so: OBJCOPYFLAGS := -S 40$(obj)/%.so: $(obj)/%.so.dbg FORCE 41 $(call if_changed,objcopy) 42 43# assembly rules for the .S files 44$(obj-vdso32): %.o: %.S 45 $(call if_changed_dep,vdso32as) 46 47# actual build commands 48quiet_cmd_vdso32ld = VDSO32L $@ 49 cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ 50quiet_cmd_vdso32as = VDSO32A $@ 51 cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< 52 53# install commands for the unstripped file 54quiet_cmd_vdso_install = INSTALL $@ 55 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 56 57vdso32.so: $(obj)/vdso32.so.dbg 58 @mkdir -p $(MODLIB)/vdso 59 $(call cmd,vdso_install) 60 61vdso_install: vdso32.so 62