| # SPDX-License-Identifier: GPL-2.0 | |
| # Copyright 2022 Google LLC | |
| KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \ | |
| -Os -DDISABLE_BRANCH_PROFILING $(DISABLE_KSTACK_ERASE) \ | |
| $(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 \ | |
| $(CONFIG_CC_OPT_NO_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) | |
| $(call cmd,force_checksrc) | |
| obj-y := idreg-override.pi.o \ | |
| map_kernel.pi.o map_range.pi.o \ | |
| lib-fdt.pi.o lib-fdt_ro.pi.o | |
| obj-$(CONFIG_RELOCATABLE) += relocate.pi.o | |
| obj-$(CONFIG_RANDOMIZE_BASE) += kaslr_early.pi.o | |
| obj-$(CONFIG_UNWIND_PATCH_PAC_INTO_SCS) += patch-scs.pi.o | |
| targets := $(patsubst %.pi.o,%.o,$(obj-y)) |