1 # SPDX-License-Identifier: GPL-2.0
2 OBJECT_FILES_NON_STANDARD := y
4 purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o
6 targets += $(purgatory-y)
7 PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
9 $(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE
10 $(call if_changed_rule,cc_o_c)
12 $(obj)/sha256.o: $(srctree)/lib/sha256.c FORCE
13 $(call if_changed_rule,cc_o_c)
15 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
16 targets += purgatory.ro
21 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
22 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
23 # sure how to relocate those. Like kexec-tools, use custom flags.
25 KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large
26 KBUILD_CFLAGS += -m$(BITS)
27 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
29 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
32 targets += kexec-purgatory.c
34 quiet_cmd_bin2c = BIN2C $@
35 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
37 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
38 $(call if_changed,bin2c)
40 obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o