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84 lines
2.6 KiB
84 lines
2.6 KiB
# 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 |
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targets += $(purgatory-y) |
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PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y)) |
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$(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE |
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$(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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# When linking purgatory.ro with -r unresolved symbols are not checked, |
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# also link a purgatory.chk binary without -r to check for unresolved symbols. |
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PURGATORY_LDFLAGS := -e purgatory_start -nostdlib -z nodefaultlib |
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LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) |
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LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) |
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targets += purgatory.ro purgatory.chk |
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# Sanitizer, etc. runtimes are unavailable and cannot be linked here. |
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GCOV_PROFILE := n |
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KASAN_SANITIZE := n |
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UBSAN_SANITIZE := n |
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KCSAN_SANITIZE := n |
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KCOV_INSTRUMENT := n |
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# These are adjustments to the compiler flags used for objects that |
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# make up the standalone purgatory.ro |
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PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel |
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PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss -g0 |
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PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING |
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PURGATORY_CFLAGS += -fno-stack-protector |
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# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That |
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# in turn leaves some undefined symbols like __fentry__ in purgatory and not |
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# sure how to relocate those. |
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ifdef CONFIG_FUNCTION_TRACER |
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PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_FTRACE) |
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endif |
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ifdef CONFIG_STACKPROTECTOR |
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PURGATORY_CFLAGS_REMOVE += -fstack-protector |
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endif |
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ifdef CONFIG_STACKPROTECTOR_STRONG |
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PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong |
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endif |
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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) |
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CFLAGS_purgatory.o += $(PURGATORY_CFLAGS) |
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CFLAGS_REMOVE_sha256.o += $(PURGATORY_CFLAGS_REMOVE) |
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CFLAGS_sha256.o += $(PURGATORY_CFLAGS) |
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CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) |
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CFLAGS_string.o += $(PURGATORY_CFLAGS) |
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AFLAGS_REMOVE_setup-x86_$(BITS).o += -Wa,-gdwarf-2 |
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AFLAGS_REMOVE_entry64.o += -Wa,-gdwarf-2 |
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$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE |
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$(call if_changed,ld) |
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$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE |
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$(call if_changed,ld) |
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targets += kexec-purgatory.c |
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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 $(obj)/purgatory.chk FORCE |
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$(call if_changed,bin2c) |
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obj-$(CONFIG_KEXEC_FILE) += kexec-purgatory.o
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