arch/powerpc/kernel/vdso32/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 # List of files in the vdso, has to be asm only for now
   4
   5 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
   6 include $(srctree)/lib/vdso/Makefile
   7
   8 obj-vdso32 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
   9
  10 ifneq ($(c-gettimeofday-y),)
  11   CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
  12   CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
  13   CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector)
  14   CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING
  15   CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables
  16   CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
  17 endif
  18
  19 # Build rules
  20
  21 ifdef CROSS32_COMPILE
  22     VDSOCC := $(CROSS32_COMPILE)gcc
  23 else
  24     VDSOCC := $(CC)
  25 endif
  26
  27 CC32FLAGS :=
  28 ifdef CONFIG_PPC64
  29 CC32FLAGS += -m32
  30 KBUILD_CFLAGS := $(filter-out -mcmodel=medium -mabi=elfv1 -mabi=elfv2 -mcall-aixdesc,$(KBUILD_CFLAGS))
  31 endif
  32
  33 targets := $(obj-vdso32) vdso32.so.dbg vgettimeofday.o
  34 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
  35
  36 GCOV_PROFILE := n
  37 KCOV_INSTRUMENT := n
  38 UBSAN_SANITIZE := n
  39 KASAN_SANITIZE := n
  40
  41 ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
  42         -Wl,-soname=linux-vdso32.so.1 -Wl,--hash-style=both
  43 asflags-y := -D__VDSO32__ -s
  44
  45 obj-y += vdso32_wrapper.o
  46 targets += vdso32.lds
  47 CPPFLAGS_vdso32.lds += -P -C -Upowerpc
  48
  49 # link rule for the .so file, .lds has to be first
  50 $(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday.o FORCE
  51         $(call if_changed,vdso32ld_and_check)
  52
  53 # assembly rules for the .S files
  54 $(obj-vdso32): %.o: %.S FORCE
  55         $(call if_changed_dep,vdso32as)
  56 $(obj)/vgettimeofday.o: %.o: %.c FORCE
  57         $(call if_changed_dep,vdso32cc)
  58
  59 # Generate VDSO offsets using helper script
  60 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
  61 quiet_cmd_vdsosym = VDSOSYM $@
  62       cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
  63
  64 include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
  65         $(call if_changed,vdsosym)
  66
  67 # actual build commands
  68 quiet_cmd_vdso32ld_and_check = VDSO32L $@
  69       cmd_vdso32ld_and_check = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) ; $(cmd_vdso_check)
  70 quiet_cmd_vdso32as = VDSO32A $@
  71       cmd_vdso32as = $(VDSOCC) $(a_flags) $(CC32FLAGS) -c -o $@ $<
  72 quiet_cmd_vdso32cc = VDSO32C $@
  73       cmd_vdso32cc = $(VDSOCC) $(c_flags) $(CC32FLAGS) -c -o $@ $<