arch/powerpc/kernel/vdso64/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # List of files in the vdso, has to be asm only for now
   3
   4 ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_PPC_ADDR16|R_PPC_ADDR16_LO|R_PPC_ADDR16_HI|R_PPC_ADDR16_HA|R_PPC_ADDR14|R_PPC_ADDR14_BRTAKEN|R_PPC_ADDR14_BRNTAKEN|R_PPC_REL24
   5 include $(srctree)/lib/vdso/Makefile
   6
   7 obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
   8
   9 ifneq ($(c-gettimeofday-y),)
  10   CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
  11   CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
  12   CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector)
  13   CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING
  14   CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables
  15   CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
  16 endif
  17
  18 # Build rules
  19
  20 targets := $(obj-vdso64) vdso64.so.dbg
  21 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
  22
  23 GCOV_PROFILE := n
  24 KCOV_INSTRUMENT := n
  25 UBSAN_SANITIZE := n
  26 KASAN_SANITIZE := n
  27
  28 ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
  29         -Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both
  30 asflags-y := -D__VDSO64__ -s
  31
  32 obj-y += vdso64_wrapper.o
  33 targets += vdso64.lds
  34 CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
  35
  36 $(obj)/vgettimeofday.o: %.o: %.c FORCE
  37
  38 # Force dependency (incbin is bad)
  39 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so.dbg
  40
  41 # link rule for the .so file, .lds has to be first
  42 $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj)/vgettimeofday.o FORCE
  43         $(call if_changed,vdso64ld_and_check)
  44
  45 # Generate VDSO offsets using helper script
  46 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
  47 quiet_cmd_vdsosym = VDSOSYM $@
  48       cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
  49
  50 include/generated/vdso64-offsets.h: $(obj)/vdso64.so.dbg FORCE
  51         $(call if_changed,vdsosym)
  52
  53 # actual build commands
  54 quiet_cmd_vdso64ld_and_check = VDSO64L $@
  55       cmd_vdso64ld_and_check = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^); $(cmd_vdso_check)