arch/s390/kernel/vdso64/Makefile

   1 # List of files in the vdso, has to be asm only for now
   2
   3 KCOV_INSTRUMENT := n
   4
   5 obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
   6
   7 # Build rules
   8
   9 targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
  10 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
  11
  12 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
  13 KBUILD_AFLAGS_64 += -m64 -s
  14
  15 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
  16 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
  17 KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
  18                         $(call cc-ldoption, -Wl$(comma)--hash-style=both)
  19
  20 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
  21 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
  22
  23 obj-y += vdso64_wrapper.o
  24 extra-y += vdso64.lds
  25 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
  26
  27 # Disable gcov profiling and ubsan for VDSO code
  28 GCOV_PROFILE := n
  29 UBSAN_SANITIZE := n
  30
  31 # Force dependency (incbin is bad)
  32 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
  33
  34 # link rule for the .so file, .lds has to be first
  35 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
  36         $(call if_changed,vdso64ld)
  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-vdso64): %.o: %.S
  45         $(call if_changed_dep,vdso64as)
  46
  47 # actual build commands
  48 quiet_cmd_vdso64ld = VDSO64L $@
  49       cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
  50 quiet_cmd_vdso64as = VDSO64A $@
  51       cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
  52
  53 # install commands for the unstripped file
  54 quiet_cmd_vdso_install = INSTALL $@
  55       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
  56
  57 vdso64.so: $(obj)/vdso64.so.dbg
  58         @mkdir -p $(MODLIB)/vdso
  59         $(call cmd,vdso_install)
  60
  61 vdso_install: vdso64.so