arch/arm64/kernel/pi/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # Copyright 2022 Google LLC
   3
   4 KBUILD_CFLAGS   := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \
   5                    -Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \
   6                    $(DISABLE_LATENT_ENTROPY_PLUGIN) \
   7                    $(call cc-option,-mbranch-protection=none) \
   8                    -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
   9                    -include $(srctree)/include/linux/hidden.h \
  10                    -D__DISABLE_EXPORTS -ffreestanding -D__NO_FORTIFY \
  11                    -fno-asynchronous-unwind-tables -fno-unwind-tables \
  12                    $(call cc-option,-fno-addrsig)
  13
  14 # remove SCS flags from all objects in this directory
  15 KBUILD_CFLAGS   := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
  16 # disable LTO
  17 KBUILD_CFLAGS   := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
  18
  19 GCOV_PROFILE    := n
  20 KASAN_SANITIZE  := n
  21 KCSAN_SANITIZE  := n
  22 UBSAN_SANITIZE  := n
  23 KCOV_INSTRUMENT := n
  24
  25 hostprogs       := relacheck
  26
  27 quiet_cmd_piobjcopy = $(quiet_cmd_objcopy)
  28       cmd_piobjcopy = $(cmd_objcopy) && $(obj)/relacheck $(@) $(<)
  29
  30 $(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \
  31                                --remove-section=.note.gnu.property \
  32                                --prefix-alloc-sections=.init
  33 $(obj)/%.pi.o: $(obj)/%.o $(obj)/relacheck FORCE
  34         $(call if_changed,piobjcopy)
  35
  36 $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
  37         $(call if_changed_rule,cc_o_c)
  38
  39 obj-y           := kaslr_early.pi.o lib-fdt.pi.o lib-fdt_ro.pi.o
  40 extra-y         := $(patsubst %.pi.o,%.o,$(obj-y))