linux-kernel - Re: [PATCH v2 00/25] objtool: Interface overhaul

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Date:   Wed, 20 Apr 2022 19:27:06 +0200 (CEST)
From:   Miroslav Benes <mbenes@...e.cz>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
cc:     x86@...nel.org, Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/25] objtool: Interface overhaul

> $ tools/objtool/objtool --help
> 
>  Usage: objtool <actions> [<options>] file.o
> 
> Actions:
>     -h, --hacks[=<jump_label,noinstr>]
>                           patch toolchain bugs/limitations
>     -i, --ibt             validate and annotate IBT
>     -l, --sls             validate straight-line-speculation mitigations
>     -m, --mcount          annotate mcount/fentry calls for ftrace
>     -n, --noinstr         validate noinstr rules
>     -o, --orc             generate ORC metadata
>     -r, --retpoline       validate and annotate retpoline usage
>     -s, --stackval        validate frame pointer rules
>     -t, --static-call     annotate static calls
>     -u, --uaccess         validate uaccess rules for SMAP
>         --dump[=<orc>]    dump metadata
> 
> Options:
>         --backtrace       unwind on error
>         --backup          create .orig files before modification
>         --dry-run         don't write modifications
>         --link            object is a linked object
>         --module          object is part of a kernel module
>         --no-unreachable  skip 'unreachable instruction' warnings
>         --sec-address     print section addresses in warnings
>         --stats           print statistics

Nice job! The outcome is much clearer now.

Reviewed-by: Miroslav Benes <mbenes@...e.cz>

M