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    SubjectRe: [PATCH v2 4/8] objtool: add undwarf debuginfo generation

    * Josh Poimboeuf <jpoimboe@redhat.com> wrote:

    > 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 undwarf, which
    > is more suitable for an in-kernel unwinder. See
    > tools/objtool/Documentation/undwarf.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>
    > ---
    > tools/objtool/Build | 3 +
    > tools/objtool/Documentation/stack-validation.txt | 46 ++---
    > tools/objtool/builtin-check.c | 2 +-
    > tools/objtool/builtin-undwarf.c | 70 ++++++++
    > tools/objtool/builtin.h | 1 +
    > tools/objtool/check.c | 59 ++++++-
    > tools/objtool/check.h | 15 +-
    > tools/objtool/elf.c | 212 ++++++++++++++++++++--
    > tools/objtool/elf.h | 15 +-
    > tools/objtool/objtool.c | 3 +-
    > tools/objtool/undwarf-types.h | 81 +++++++++

    Just a very quick stylistic suggestion: please name the header 'undwarf_types.h'
    (note the underscore versus hyphen), which is the common naming pattern used in
    the kernel.

    Thanks,

    Ingo

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