arch/s390/kernel/vdso64/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # List of files in the vdso
   3
   4 KCOV_INSTRUMENT := n
   5 ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE
   6 ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
   7
   8 include $(srctree)/lib/vdso/Makefile
   9 obj-vdso64 = vdso_user_wrapper.o note.o
  10 obj-cvdso64 = vdso64_generic.o getcpu.o
  11 VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE) $(CC_FLAGS_EXPOLINE) $(CC_FLAGS_CHECK_STACK)
  12 CFLAGS_REMOVE_getcpu.o = $(VDSO_CFLAGS_REMOVE)
  13 CFLAGS_REMOVE_vdso64_generic.o = $(VDSO_CFLAGS_REMOVE)
  14
  15 # Build rules
  16
  17 targets := $(obj-vdso64) $(obj-cvdso64) vdso64.so vdso64.so.dbg
  18 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
  19 obj-cvdso64 := $(addprefix $(obj)/, $(obj-cvdso64))
  20
  21 KBUILD_AFLAGS += -DBUILD_VDSO
  22 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
  23
  24 KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
  25 KBUILD_AFLAGS_64 += -m64 -s
  26
  27 KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
  28 KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
  29 ldflags-y := -fPIC -shared -nostdlib -soname=linux-vdso64.so.1 \
  30              --hash-style=both --build-id=sha1 -T
  31
  32 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
  33 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
  34
  35 obj-y += vdso64_wrapper.o
  36 targets += vdso64.lds
  37 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
  38
  39 # Disable gcov profiling, ubsan and kasan for VDSO code
  40 GCOV_PROFILE := n
  41 UBSAN_SANITIZE := n
  42 KASAN_SANITIZE := n
  43 KCSAN_SANITIZE := n
  44
  45 # Force dependency (incbin is bad)
  46 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
  47
  48 # link rule for the .so file, .lds has to be first
  49 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
  50         $(call if_changed,ld)
  51
  52 # strip rule for the .so file
  53 $(obj)/%.so: OBJCOPYFLAGS := -S
  54 $(obj)/%.so: $(obj)/%.so.dbg FORCE
  55         $(call if_changed,objcopy)
  56
  57 # assembly rules for the .S files
  58 $(obj-vdso64): %.o: %.S FORCE
  59         $(call if_changed_dep,vdso64as)
  60
  61 $(obj-cvdso64): %.o: %.c FORCE
  62         $(call if_changed_dep,vdso64cc)
  63
  64 # actual build commands
  65 quiet_cmd_vdso64as = VDSO64A $@
  66       cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
  67 quiet_cmd_vdso64cc = VDSO64C $@
  68       cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<
  69
  70 # install commands for the unstripped file
  71 quiet_cmd_vdso_install = INSTALL $@
  72       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
  73
  74 vdso64.so: $(obj)/vdso64.so.dbg
  75         @mkdir -p $(MODLIB)/vdso
  76         $(call cmd,vdso_install)
  77
  78 vdso_install: vdso64.so
  79
  80 # Generate VDSO offsets using helper script
  81 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
  82 quiet_cmd_vdsosym = VDSOSYM $@
  83         cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
  84
  85 include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
  86         $(call if_changed,vdsosym)