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)/sha256.o: $(srctree)/lib/sha256.c FORCE 10 $(call if_changed_rule,cc_o_c) 11 12LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib 13targets += purgatory.ro 14 15KASAN_SANITIZE := n 16KCOV_INSTRUMENT := n 17 18# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That 19# in turn leaves some undefined symbols like __fentry__ in purgatory and not 20# sure how to relocate those. Like kexec-tools, use custom flags. 21 22KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large 23KBUILD_CFLAGS += -m$(BITS) 24KBUILD_CFLAGS += $(call cc-option,-fno-PIE) 25 26$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE 27 $(call if_changed,ld) 28 29targets += kexec-purgatory.c 30 31CMD_BIN2C = $(objtree)/scripts/basic/bin2c 32quiet_cmd_bin2c = BIN2C $@ 33 cmd_bin2c = $(CMD_BIN2C) kexec_purgatory < $< > $@ 34 35$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE 36 $(call if_changed,bin2c) 37 38obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o 39