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Now that objtool knows the states of all registers on the stack for each instruction, it's straightforward to generate debuginfo for an unwinder to use. Instead of generating DWARF, generate a new format called ORC, which is more suitable for an in-kernel unwinder. See Documentation/x86/orc-unwinder.txt for a more detailed description of this new debuginfo format and why it's preferable to DWARF. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: live-patching@vger.kernel.org Link: http://lkml.kernel.org/r/c9b9f01ba6c5ed2bdc9bb0957b78167fdbf9632e.1499786555.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
23 lines
505 B
Plaintext
23 lines
505 B
Plaintext
objtool-y += arch/$(SRCARCH)/
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objtool-y += builtin-check.o
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objtool-y += builtin-orc.o
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objtool-y += check.o
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objtool-y += orc_gen.o
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objtool-y += orc_dump.o
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objtool-y += elf.o
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objtool-y += special.o
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objtool-y += objtool.o
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objtool-y += libstring.o
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objtool-y += str_error_r.o
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CFLAGS += -I$(srctree)/tools/lib
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$(OUTPUT)libstring.o: ../lib/string.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)str_error_r.o: ../lib/str_error_r.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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