linux-kernel - Re: [PATCH v2 0/2] objtool: add support for >64k sections

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Date:   Tue, 21 Apr 2020 18:52:31 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Kristen Carlson Accardi <kristen@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] objtool: add support for >64k sections

On Tue, Apr 21, 2020 at 03:08:41PM -0700, Sami Tolvanen wrote:
> This series fixes objtool for binaries with >64k sections, and
> includes optimizations to reduce the runtime for a binary with
> ~130k sections from >15 minutes to ~4 seconds.
> 
> Changes in v2:
>  - Dropped the insn_hash optimization as Peter has a nearly
>    similar change queued already.
>  - Instead of storing the last instruction for each section,
>    use find_insn to locate it.
> 
> 
> Sami Tolvanen (2):
>   objtool: use gelf_getsymshndx to handle >64k sections
>   objtool: optimize add_dead_ends for split sections
> 
>  tools/objtool/check.c | 36 +++++++++++++++++-------------------
>  tools/objtool/elf.c   | 24 +++++++++++++++++-------
>  2 files changed, 34 insertions(+), 26 deletions(-)
> 
> 
> base-commit: 18bf34080c4c3beb6699181986cc97dd712498fe

Looks good to me, thanks.  I'll add them to the queue for testing, along
with that other patch.

-- 
Josh