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/sha256.c FORCE 13 $(call if_changed_rule,cc_o_c) 14 15LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib 16targets += purgatory.ro 17 18KASAN_SANITIZE := n 19KCOV_INSTRUMENT := n 20 21# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 22# in turn leaves some undefined symbols like __fentry__ in purgatory and not 23# sure how to relocate those. 24ifdef CONFIG_FUNCTION_TRACER 25CFLAGS_REMOVE_sha256.o += $(CC_FLAGS_FTRACE) 26CFLAGS_REMOVE_purgatory.o += $(CC_FLAGS_FTRACE) 27CFLAGS_REMOVE_string.o += $(CC_FLAGS_FTRACE) 28CFLAGS_REMOVE_kexec-purgatory.o += $(CC_FLAGS_FTRACE) 29endif 30 31ifdef CONFIG_STACKPROTECTOR 32CFLAGS_REMOVE_sha256.o += -fstack-protector 33CFLAGS_REMOVE_purgatory.o += -fstack-protector 34CFLAGS_REMOVE_string.o += -fstack-protector 35CFLAGS_REMOVE_kexec-purgatory.o += -fstack-protector 36endif 37 38ifdef CONFIG_STACKPROTECTOR_STRONG 39CFLAGS_REMOVE_sha256.o += -fstack-protector-strong 40CFLAGS_REMOVE_purgatory.o += -fstack-protector-strong 41CFLAGS_REMOVE_string.o += -fstack-protector-strong 42CFLAGS_REMOVE_kexec-purgatory.o += -fstack-protector-strong 43endif 44 45ifdef CONFIG_RETPOLINE 46CFLAGS_REMOVE_sha256.o += $(RETPOLINE_CFLAGS) 47CFLAGS_REMOVE_purgatory.o += $(RETPOLINE_CFLAGS) 48CFLAGS_REMOVE_string.o += $(RETPOLINE_CFLAGS) 49CFLAGS_REMOVE_kexec-purgatory.o += $(RETPOLINE_CFLAGS) 50endif 51 52$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 53 $(call if_changed,ld) 54 55targets += kexec-purgatory.c 56 57quiet_cmd_bin2c = BIN2C $@ 58 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@ 59 60$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE 61 $(call if_changed,bin2c) 62 63obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o 64