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 # These are adjustments to the compiler flags used for objects that
22 # make up the standalone purgatory.ro
24 PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
25 PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
27 # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
28 # in turn leaves some undefined symbols like __fentry__ in purgatory and not
29 # sure how to relocate those.
30 ifdef CONFIG_FUNCTION_TRACER
31 PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE)
34 ifdef CONFIG_STACKPROTECTOR
35 PURGATORY_CFLAGS_REMOVE += -fstack-protector
38 ifdef CONFIG_STACKPROTECTOR_STRONG
39 PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong
42 ifdef CONFIG_RETPOLINE
43 PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS)
46 CFLAGS_REMOVE_purgatory.o += $(PURGATORY_CFLAGS_REMOVE)
47 CFLAGS_purgatory.o += $(PURGATORY_CFLAGS)
49 CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE)
50 CFLAGS_sha256.o += $(PURGATORY_CFLAGS)
52 CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE)
53 CFLAGS_string.o += $(PURGATORY_CFLAGS)
55 $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
58 targets += kexec-purgatory.c
60 quiet_cmd_bin2c = BIN2C $@
61 cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
63 $(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
64 $(call if_changed,bin2c)
66 obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o