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 20# Sanitizer runtimes are unavailable and cannot be linked here. 21KASAN_SANITIZE := n 22KCSAN_SANITIZE := n 23KCOV_INSTRUMENT := n 24 25# These are adjustments to the compiler flags used for objects that 26# make up the standalone purgatory.ro 27 28PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel 29PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss 30PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) 31 32# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 33# in turn leaves some undefined symbols like __fentry__ in purgatory and not 34# sure how to relocate those. 35ifdef CONFIG_FUNCTION_TRACER 36PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) 37endif 38 39ifdef CONFIG_STACKPROTECTOR 40PURGATORY_CFLAGS_REMOVE += -fstack-protector 41endif 42 43ifdef CONFIG_STACKPROTECTOR_STRONG 44PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong 45endif 46 47ifdef CONFIG_RETPOLINE 48PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS) 49endif 50 51CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) 52CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) 53 54CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) 55CFLAGS_sha256.o += $(PURGATORY_CFLAGS) 56 57CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) 58CFLAGS_string.o += $(PURGATORY_CFLAGS) 59 60$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 61 $(call if_changed,ld) 62 63targets += kexec-purgatory.c 64 65quiet_cmd_bin2c = BIN2C $@ 66 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@ 67 68$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE 69 $(call if_changed,bin2c) 70 71obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o 72