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# SPDX-License-Identifier: GPL-2.0
# Copyright 2022 Google LLC
KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \
-Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \
$(DISABLE_LATENT_ENTROPY_PLUGIN) \
$(call cc-option,-mbranch-protection=none) \
-I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
-include $(srctree)/include/linux/hidden.h \
-D__DISABLE_EXPORTS -ffreestanding -D__NO_FORTIFY \
-fno-asynchronous-unwind-tables -fno-unwind-tables \
$(call cc-option,-fno-addrsig)
# this code may run with the MMU off so disable unaligned accesses
CFLAGS_map_range.o += -mstrict-align
# remove SCS flags from all objects in this directory
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
# disable LTO
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
GCOV_PROFILE := n
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
UBSAN_SANITIZE := n
KCOV_INSTRUMENT := n
hostprogs := relacheck
quiet_cmd_piobjcopy = $(quiet_cmd_objcopy)
cmd_piobjcopy = $(cmd_objcopy) && $(obj)/relacheck $(@) $(<)
$(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \
--remove-section=.note.gnu.property
$(obj)/%.pi.o: $(obj)/%.o $(obj)/relacheck FORCE
$(call if_changed,piobjcopy)
# ensure that all the lib- code ends up as __init code and data
$(obj)/lib-%.pi.o: OBJCOPYFLAGS += --prefix-alloc-sections=.init
$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
$(call if_changed_rule,cc_o_c)
obj-y := idreg-override.pi.o \
map_kernel.pi.o map_range.pi.o \
lib-fdt.pi.o lib-fdt_ro.pi.o
obj-$(CONFIG_RELOCATABLE) += relocate.pi.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr_early.pi.o
obj-$(CONFIG_UNWIND_PATCH_PAC_INTO_SCS) += patch-scs.pi.o
extra-y := $(patsubst %.pi.o,%.o,$(obj-y))
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