1# SPDX-License-Identifier: GPL-2.0
2# Copyright 2022 Google LLC
3
4KBUILD_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
14KBUILD_CFLAGS	:= $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
15# disable LTO
16KBUILD_CFLAGS	:= $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
17
18GCOV_PROFILE	:= n
19KASAN_SANITIZE	:= n
20KCSAN_SANITIZE	:= n
21UBSAN_SANITIZE	:= n
22KCOV_INSTRUMENT	:= n
23
24$(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
33obj-y		:= kaslr_early.pi.o lib-fdt.pi.o lib-fdt_ro.pi.o
34extra-y		:= $(patsubst %.pi.o,%.o,$(obj-y))
35