• Josh Poimboeuf's avatar
    objtool: Add ORC unwind table generation · 627fce14
    Josh Poimboeuf authored
    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: default avatarJosh 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.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>