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From: Ahmad Nouralizadeh <ahmad.mlists@gmail.com>
Date: Tue, 23 Jun 2020 16:18:42 +0430
Message-ID: <CAMYFX7nxegE8ZZKGT3JQMS3B7kxf9BErn+sWxYknkxpej-cvew@mail.gmail.com>
Subject: Re: GDB Frame Unwinding for Pure Assembly Code
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: "gdb@sourceware.org" <gdb@sourceware.org>
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Hi Jan,
Thanks for the answer! Could you tell me why is an inline unwinder used?
Regards.

On Tuesday, 23 June 2020, Jan Kratochvil <jan.kratochvil@redhat.com> wrote:

> On Mon, 22 Jun 2020 23:55:30 +0200, Ahmad Nouralizadeh via Gdb wrote:
> > But knowing the GDB mechanism to get over the problem will be helpful.
>
> GDB disassembles the code and tries to guess how to unwind it.
> amd64-tdep.c amd64_analyze_prologue(), amd64_frame_cache_1() etc.
>
> That is just a last resort way of unwinding (=a bug in the debuggee), there
> should always be .eh_frame in the debuggee, also for throwing exceptions
> across such .eh_frame-less functions if there is any callback there.
>
>
> Jan
>
>