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 17# When linking purgatory.ro with -r unresolved symbols are not checked, 18# also link a purgatory.chk binary without -r to check for unresolved symbols. 19PURGATORY_LDFLAGS := -e purgatory_start -nostdlib -z nodefaultlib 20LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) 21LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) 22targets += purgatory.ro purgatory.chk 23 24# Sanitizer, etc. runtimes are unavailable and cannot be linked here. 25GCOV_PROFILE := n 26KASAN_SANITIZE := n 27UBSAN_SANITIZE := n 28KCSAN_SANITIZE := n 29KCOV_INSTRUMENT := n 30 31# These are adjustments to the compiler flags used for objects that 32# make up the standalone purgatory.ro 33 34PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel 35PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss 36PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING 37 38# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 39# in turn leaves some undefined symbols like __fentry__ in purgatory and not 40# sure how to relocate those. 41ifdef CONFIG_FUNCTION_TRACER 42PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) 43endif 44 45ifdef CONFIG_STACKPROTECTOR 46PURGATORY_CFLAGS_REMOVE += -fstack-protector 47endif 48 49ifdef CONFIG_STACKPROTECTOR_STRONG 50PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong 51endif 52 53ifdef CONFIG_RETPOLINE 54PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS) 55endif 56 57CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE) 58CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) 59 60CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) 61CFLAGS_sha256.o += $(PURGATORY_CFLAGS) 62 63CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) 64CFLAGS_string.o += $(PURGATORY_CFLAGS) 65 66$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 67 $(call if_changed,ld) 68 69$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE 70 $(call if_changed,ld) 71 72targets += kexec-purgatory.c 73 74quiet_cmd_bin2c = BIN2C $@ 75 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@ 76 77$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro $(obj)/purgatory.chk FORCE 78 $(call if_changed,bin2c) 79 80obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o 81