1aacd149bSArd Biesheuvel# SPDX-License-Identifier: GPL-2.0 2aacd149bSArd Biesheuvel# Copyright 2022 Google LLC 3aacd149bSArd Biesheuvel 4aacd149bSArd BiesheuvelKBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \ 5aacd149bSArd Biesheuvel -Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \ 63dfdc275SArd Biesheuvel $(DISABLE_LATENT_ENTROPY_PLUGIN) \ 7aacd149bSArd Biesheuvel $(call cc-option,-mbranch-protection=none) \ 8aacd149bSArd Biesheuvel -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \ 9aacd149bSArd Biesheuvel -include $(srctree)/include/linux/hidden.h \ 10aacd149bSArd Biesheuvel -D__DISABLE_EXPORTS -ffreestanding -D__NO_FORTIFY \ 1168c76ad4SArd Biesheuvel -fno-asynchronous-unwind-tables -fno-unwind-tables \ 12aacd149bSArd Biesheuvel $(call cc-option,-fno-addrsig) 13aacd149bSArd Biesheuvel 14aacd149bSArd Biesheuvel# remove SCS flags from all objects in this directory 15aacd149bSArd BiesheuvelKBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) 16aacd149bSArd Biesheuvel# disable LTO 17aacd149bSArd BiesheuvelKBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS)) 18aacd149bSArd Biesheuvel 19aacd149bSArd BiesheuvelGCOV_PROFILE := n 20aacd149bSArd BiesheuvelKASAN_SANITIZE := n 21aacd149bSArd BiesheuvelKCSAN_SANITIZE := n 22aacd149bSArd BiesheuvelUBSAN_SANITIZE := n 23aacd149bSArd BiesheuvelKCOV_INSTRUMENT := n 24aacd149bSArd Biesheuvel 2548157aa3SArd Biesheuvelhostprogs := relacheck 2648157aa3SArd Biesheuvel 2748157aa3SArd Biesheuvelquiet_cmd_piobjcopy = $(quiet_cmd_objcopy) 2848157aa3SArd Biesheuvel cmd_piobjcopy = $(cmd_objcopy) && $(obj)/relacheck $(@) $(<) 2948157aa3SArd Biesheuvel 30aacd149bSArd Biesheuvel$(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \ 31a86aa72eSArd Biesheuvel --remove-section=.note.gnu.property 3248157aa3SArd Biesheuvel$(obj)/%.pi.o: $(obj)/%.o $(obj)/relacheck FORCE 3348157aa3SArd Biesheuvel $(call if_changed,piobjcopy) 34aacd149bSArd Biesheuvel 35a86aa72eSArd Biesheuvel# ensure that all the lib- code ends up as __init code and data 36a86aa72eSArd Biesheuvel$(obj)/lib-%.pi.o: OBJCOPYFLAGS += --prefix-alloc-sections=.init 37a86aa72eSArd Biesheuvel 38aacd149bSArd Biesheuvel$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE 39aacd149bSArd Biesheuvel $(call if_changed_rule,cc_o_c) 40aacd149bSArd Biesheuvel 41*e223a449SArd Biesheuvelobj-y := idreg-override.pi.o lib-fdt.pi.o lib-fdt_ro.pi.o 42*e223a449SArd Biesheuvelobj-$(CONFIG_RELOCATABLE) += relocate.pi.o 43*e223a449SArd Biesheuvelobj-$(CONFIG_RANDOMIZE_BASE) += kaslr_early.pi.o 44aacd149bSArd Biesheuvelextra-y := $(patsubst %.pi.o,%.o,$(obj-y)) 45