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                    $(call cc-option,-mbranch-protection=none) \
   7                    -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
   8                    -include $(srctree)/include/linux/hidden.h \
   9                    -D__DISABLE_EXPORTS -ffreestanding -D__NO_FORTIFY \
  10                    -fno-asynchronous-unwind-tables -fno-unwind-tables \
  11                    $(call cc-option,-fno-addrsig)
  12
  13 # remove SCS flags from all objects in this directory
  14 KBUILD_CFLAGS   := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
  15 # disable LTO
  16 KBUILD_CFLAGS   := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
  17
  18 GCOV_PROFILE    := n
  19 KASAN_SANITIZE  := n
  20 KCSAN_SANITIZE  := n
  21 UBSAN_SANITIZE  := n
  22 KCOV_INSTRUMENT := n
  23
  24 $(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \
  25                                --remove-section=.note.gnu.property \
  26                                --prefix-alloc-sections=.init
  27 $(obj)/%.pi.o: $(obj)/%.o FORCE
  28         $(call if_changed,objcopy)
  29
  30 $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
  31         $(call if_changed_rule,cc_o_c)
  32
  33 obj-y           := kaslr_early.pi.o lib-fdt.pi.o lib-fdt_ro.pi.o
  34 extra-y         := $(patsubst %.pi.o,%.o,$(obj-y))