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 for VDSO code 28GCOV_PROFILE := n 29 30# Force dependency (incbin is bad) 31$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so 32 33# link rule for the .so file, .lds has to be first 34$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) 35 $(call if_changed,vdso32ld) 36 37# strip rule for the .so file 38$(obj)/%.so: OBJCOPYFLAGS := -S 39$(obj)/%.so: $(obj)/%.so.dbg FORCE 40 $(call if_changed,objcopy) 41 42# assembly rules for the .S files 43$(obj-vdso32): %.o: %.S 44 $(call if_changed_dep,vdso32as) 45 46# actual build commands 47quiet_cmd_vdso32ld = VDSO32L $@ 48 cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@ 49quiet_cmd_vdso32as = VDSO32A $@ 50 cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< 51 52# install commands for the unstripped file 53quiet_cmd_vdso_install = INSTALL $@ 54 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ 55 56vdso32.so: $(obj)/vdso32.so.dbg 57 @mkdir -p $(MODLIB)/vdso 58 $(call cmd,vdso_install) 59 60vdso_install: vdso32.so 61