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# SPDX-License-Identifier: GPL-2.0
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OBJECT_FILES_NON_STANDARD := y

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purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o

targets += $(purgatory-y)
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))

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$(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE
	$(call if_changed_rule,cc_o_c)

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$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
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	$(call if_changed_rule,cc_o_c)

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CFLAGS_sha256.o := -D__DISABLE_EXPORTS

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LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib -z nodefaultlib
targets += purgatory.ro

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# Sanitizer, etc. runtimes are unavailable and cannot be linked here.
GCOV_PROFILE	:= n
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KASAN_SANITIZE	:= n
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UBSAN_SANITIZE	:= n
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KCOV_INSTRUMENT := n

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# These are adjustments to the compiler flags used for objects that
# make up the standalone purgatory.ro

PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
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PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING
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# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
# in turn leaves some undefined symbols like __fentry__ in purgatory and not
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# sure how to relocate those.
ifdef CONFIG_FUNCTION_TRACER
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PURGATORY_CFLAGS_REMOVE		+= $(CC_FLAGS_FTRACE)
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endif

ifdef CONFIG_STACKPROTECTOR
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PURGATORY_CFLAGS_REMOVE		+= -fstack-protector
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endif

ifdef CONFIG_STACKPROTECTOR_STRONG
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PURGATORY_CFLAGS_REMOVE		+= -fstack-protector-strong
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endif

ifdef CONFIG_RETPOLINE
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PURGATORY_CFLAGS_REMOVE		+= $(RETPOLINE_CFLAGS)
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endif
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CFLAGS_REMOVE_purgatory.o	+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_purgatory.o		+= $(PURGATORY_CFLAGS)

CFLAGS_REMOVE_sha256.o		+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_sha256.o			+= $(PURGATORY_CFLAGS)

CFLAGS_REMOVE_string.o		+= $(PURGATORY_CFLAGS_REMOVE)
CFLAGS_string.o			+= $(PURGATORY_CFLAGS)

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$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
		$(call if_changed,ld)

targets += kexec-purgatory.c

quiet_cmd_bin2c = BIN2C   $@
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      cmd_bin2c = $(objtree)/scripts/bin2c kexec_purgatory < $< > $@
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$(obj)/kexec-purgatory.c: $(obj)/purgatory.ro FORCE
	$(call if_changed,bin2c)

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obj-$(CONFIG_KEXEC_FILE)	+= kexec-purgatory.o