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Message-ID: <CAAvnz_qR39CKGz26nn2csdukOUOW-B0sONCv9NGjJ-kmc-Z9Uw@mail.gmail.com>
Date: Mon, 29 Jul 2024 08:19:42 +0800
From: Howard Su <howard0su@...il.com>
To: Howard Su <howard0su@...il.com>, Rich Felker <dalias@...c.org>, Thorsten Glaser <tg@...bsd.de>,
musl@...ts.openwall.com
Subject: Re: [Suggestion] Add cfi directives to assembly code via chatgpt
Per suggestion, I added awk script to do so. Please help review. also I
noticed that stack unwind is still not functional.
On Tue, Jul 23, 2024 at 5:39 AM Szabolcs Nagy <nsz@...t70.net> wrote:
> * Howard Su <howard0su@...il.com> [2024-07-22 14:39:35 +0800]:
> > fair enough. Let's put aside that LLM writing the CFI directives. I do
> have
> > knowledge about it to hand write it.
> >
> > Do you think it is a good idea to put effort into adding CFI to those
> > assembly code, especially the thread_cp part, which blocks my debug.
>
> note that there is now support in gas to synthetize the CFI for
> manually written x86 asm code with --scfi=experimental
> https://sourceware.org/binutils/docs/as.html
>
> the aarch64 support just got committed recently
>
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=29085f7243e415db0e1617173eb80c441671ba0e
>
> there is no support for arm yet.
>
> meanwhile musl has tools/add-cfi*.awk that you could extend to
> support arm, this is simpler than adding the gas support as it
> only has to work for musl code.
>
>
--
-Howard
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