linux-kernel - Re: [PATCH v1 6/7] DCE/DSE: riscv: add HAVE_TRIM_UNUSED

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <3a8f0d0a-25ad-49c3-9cd2-66db44a4a1e6@app.fastmail.com>
Date:   Tue, 26 Sep 2023 08:10:17 +0200
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Zhangjin Wu" <falcon@...ylab.org>, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-riscv@...ts.infradead.org
Cc:     "Palmer Dabbelt" <palmer@...osinc.com>,
        "Paul Walmsley" <paul.walmsley@...ive.com>, paulburton@...nel.org,
        "Paul E. McKenney" <paulmck@...nel.org>,
        "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
        "Willy Tarreau" <w@....eu>,
        Thomas Weißschuh <linux@...ssschuh.net>,
        "Tim Bird" <tim.bird@...y.com>
Subject: Re: [PATCH v1 6/7] DCE/DSE: riscv: add HAVE_TRIM_UNUSED_SYSCALLS support

On Tue, Sep 26, 2023, at 00:42, Zhangjin Wu wrote:
> For HAVE_TRIM_UNUSED_SYSCALLS, the syscall tables are hacked with the
> inputing unused_syscalls.
>
> Firstly, the intermediate preprocessed .i files are generated from the
> original C version of syscall tables respectively, and named with a
> 'used' suffix: syscall_table_used.i, compat_syscall_table_used.i.
>
> Secondly, all of the unused syscalls are commented.
>
> At last, two new objective files sufixed with 'used' are generated from
> the hacked .i files and they are linked into the eventual kernel image.
>
> Signed-off-by: Zhangjin Wu <falcon@...ylab.org>

As mentioned in my comment on the mips patch, hacking the preprocessed
file here is too much strain on the old infrastructure, the
asm-generic/unistd.h file is already too hard to understand for
anyone and in need of an overhaul, so let's work together on fixing
it up first.

      Arnd