| # 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)) |
| |
| 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)) |
