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From: Ahmad Nouralizadeh <ahmad.mlists@gmail.com>
Date: Tue, 23 Jun 2020 02:25:30 +0430
Message-ID: <CAMYFX7mJtb5yRvarqJdnacRW7oEWpW3kH1aZGu1ope9AL0X-Yg@mail.gmail.com>
Subject: Re: GDB Frame Unwinding for Pure Assembly Code
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: gdb@sourceware.org
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Hi Jan,
Thanks! I will try with elfutils. I could not find any ".cfi_*"
directive in libx264 source code. But knowing the GDB mechanism to get
over the problem will be helpful.

Regards.

On Tue, 23 Jun 2020 at 02:10, Jan Kratochvil <jan.kratochvil@redhat.com> wrote:
>
> On Mon, 22 Jun 2020 23:29:01 +0200, Ahmad Nouralizadeh via Gdb wrote:
> > Perf copies stack contents during execution and uses
> > libunwind to unwind the backtraces in a post-process phase.
>
> perf can use also elfutils unwinder by a compile time option.
> IIRC someone was implementing non-DWARF unwinder for elfutils but not sure if
> it got upstreamed or not.  You can try also the elfutils unwinder.
>
> as has .cfi_startproc to generate .eh_frame, doesn't nasm also have some such?
>
>
> Jan
>