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Date: Wed, 1 Jul 2009 12:26:37 -0700
From: Nathan Froyd <froydnj@codesourcery.com>
Subject: Re: [Qemu-devel] Extending gdb stub implementation with ARM926
	registers support
Message-ID: <20090701192637.GF1119@codesourcery.com>
References: <dd5065570907011005l2cf14fbao5b61d15ecd3563d@mail.gmail.com>
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To: qemu-devel@nongnu.org

On Wed, Jul 01, 2009 at 09:05:35PM +0400, Dmitry Smirnov wrote:
> As you know, ARM926 has few registers that are not supported by
> current gdb stub. For instance, SPSRs, R13_abt, etc.
> 
> Is it possible to extend gdb stub in this way?
> I would try to do it by myself, but I need some guidelines. Obviously,
> I need to extend the stub with some xml files describing these
> registers and add its processing somehow. How?

You'll need to:

- Write the necessary XML file(s) in gdb-xml/.  I believe the format of
  the XML files is minimally documented in the GDB manual.  Reading
  other XML files can help as well (both in QEMU and GDB itself);

- Add those XML file(s) to gdb_xml_files in configure for appropriate
  targets;

- Add appropriate calls to gdb_register_coprocessor in
  target-arm/helper.c:cpu_arm_init.

-Nathan