arch/s390/kernel/vdso32/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-vdso32 = vdso_user_wrapper-32.o note-32.o
  10
  11 # Build rules
  12
  13 targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
  14 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
  15
  16 KBUILD_AFLAGS += -DBUILD_VDSO
  17 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
  18
  19 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS))
  20 KBUILD_AFLAGS_32 += -m31 -s
  21
  22 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
  23 KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin
  24
  25 LDFLAGS_vdso32.so.dbg += -fPIC -shared -nostdlib -soname=linux-vdso32.so.1 \
  26         --hash-style=both --build-id=sha1 -melf_s390 -T
  27
  28 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
  29 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
  30
  31 obj-y += vdso32_wrapper.o
  32 targets += vdso32.lds
  33 CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
  34
  35 # Disable gcov profiling, ubsan and kasan for VDSO code
  36 GCOV_PROFILE := n
  37 UBSAN_SANITIZE := n
  38 KASAN_SANITIZE := n
  39 KCSAN_SANITIZE := n
  40
  41 # Force dependency (incbin is bad)
  42 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
  43
  44 $(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
  45         $(call if_changed,ld)
  46
  47 # strip rule for the .so file
  48 $(obj)/%.so: OBJCOPYFLAGS := -S
  49 $(obj)/%.so: $(obj)/%.so.dbg FORCE
  50         $(call if_changed,objcopy)
  51
  52 $(obj-vdso32): %-32.o: %.S FORCE
  53         $(call if_changed_dep,vdso32as)
  54
  55 # actual build commands
  56 quiet_cmd_vdso32as = VDSO32A $@
  57       cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
  58 quiet_cmd_vdso32cc = VDSO32C $@
  59       cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $<
  60
  61 # install commands for the unstripped file
  62 quiet_cmd_vdso_install = INSTALL $@
  63       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
  64
  65 vdso32.so: $(obj)/vdso32.so.dbg
  66         @mkdir -p $(MODLIB)/vdso
  67         $(call cmd,vdso_install)
  68
  69 vdso_install: vdso32.so
  70
  71 # Generate VDSO offsets using helper script
  72 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
  73 quiet_cmd_vdsosym = VDSOSYM $@
  74         cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
  75
  76 include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
  77         $(call if_changed,vdsosym)