arch/s390/kernel/vdso64/Makefile

   1 # List of files in the vdso, has to be asm only for now
   2
   3 obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o
   4
   5 # Build rules
   6
   7 targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
   8 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
   9
  10 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
  11 KBUILD_AFLAGS_64 += -m64 -s
  12
  13 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
  14 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
  15 KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
  16                         $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
  17
  18 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
  19 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
  20
  21 obj-y += vdso64_wrapper.o
  22 extra-y += vdso64.lds
  23 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
  24
  25 # Disable gcov profiling for VDSO code
  26 GCOV_PROFILE := n
  27
  28 # Force dependency (incbin is bad)
  29 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
  30
  31 # link rule for the .so file, .lds has to be first
  32 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
  33         $(call if_changed,vdso64ld)
  34
  35 # strip rule for the .so file
  36 $(obj)/%.so: OBJCOPYFLAGS := -S
  37 $(obj)/%.so: $(obj)/%.so.dbg FORCE
  38         $(call if_changed,objcopy)
  39
  40 # assembly rules for the .S files
  41 $(obj-vdso64): %.o: %.S
  42         $(call if_changed_dep,vdso64as)
  43
  44 # actual build commands
  45 quiet_cmd_vdso64ld = VDSO64L $@
  46       cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
  47 quiet_cmd_vdso64as = VDSO64A $@
  48       cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
  49
  50 # install commands for the unstripped file
  51 quiet_cmd_vdso_install = INSTALL $@
  52       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
  53
  54 vdso64.so: $(obj)/vdso64.so.dbg
  55         @mkdir -p $(MODLIB)/vdso
  56         $(call cmd,vdso_install)
  57
  58 vdso_install: vdso64.so