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