1# SPDX-License-Identifier: GPL-2.0 2OBJECT_FILES_NON_STANDARD := y 3 4purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o 5 6targets += $(purgatory-y) 7PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y)) 8 9$(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE 10 $(call if_changed_rule,cc_o_c) 11 12$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE 13 $(call if_changed_rule,cc_o_c) 14 15CFLAGS_sha256.o := -D__DISABLE_EXPORTS 16 17LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib 18targets += purgatory.ro 19 20KASAN_SANITIZE := n 21KCOV_INSTRUMENT := n 22 23# These are adjustments to the compiler flags used for objects that 24# make up the standalone purgatory.ro 25 26PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel 27PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss 28PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) 29 30# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 31# in turn leaves some undefined symbols like __fentry__ in purgatory and not 32# sure how to relocate those. 33ifdef CONFIG_FUNCTION_TRACER 34PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) 35endif 36 37ifdef CONFIG_STACKPROTECTOR 38PURGATORY_CFLAGS_REMOVE += -fstack-protector 39endif 40 41ifdef CONFIG_STACKPROTECTOR_STRONG 42PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong 43endif 44 45ifdef CONFIG_RETPOLINE 46PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS) 47endif 48 49CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) 50CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) 51 52CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) 53CFLAGS_sha256.o += $(PURGATORY_CFLAGS) 54 55CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) 56CFLAGS_string.o += $(PURGATORY_CFLAGS) 57 58$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 59 $(call if_changed,ld) 60 61targets += kexec-purgatory.c 62 63quiet_cmd_bin2c = BIN2C $@ 64 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@ 65 66$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE 67 $(call if_changed,bin2c) 68 69obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o 70