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Re: Debugging of embedded target applications

To: Geoffrey Espin <espin@idiom.com>
Subject: Re: Debugging of embedded target applications
From: Daniel Jacobowitz <dan@debian.org>
Date: Tue, 7 May 2002 22:32:36 -0400
Cc: "Siders, Keith" <keith_siders@toshibatv.com>, "Linux-Mips (E-mail)" <linux-mips@oss.sgi.com>
In-reply-to: <20020507192523.A73748@idiom.com>
References: <7DF7BFDC95ECD411B4010090278A44CA379AA1@ATVX> <20020507221512.GA22326@nevyn.them.org> <20020507154427.D12509@idiom.com> <20020508014314.GA30243@nevyn.them.org> <20020507192523.A73748@idiom.com>
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On Tue, May 07, 2002 at 07:25:23PM -0700, Geoffrey Espin wrote:
> On Tue, May 07, 2002 at 09:43:14PM -0400, Daniel Jacobowitz wrote:
> > > Does work it for kernel type debugging over *Ethernet*?
> > > I see some docs saying "TCP/IP" connection... but does that
> > > mean a special kind of network driver?  Or a gdbstub/agent
> > > outside the kernel in a special monitor?
> > What do you mean by kernel type debugging?  It's not a kernel stub.  It
> > can debug user programs over TCP/IP or a serial line.
> 
> In traditional embedded RTOS land, "system-level debugging".
> In the olden days one had to have BDM/JTAG hardware assist
> to step thru truly arbitary bits of code, like interrupt handlers,
> scheduler.
> 
> The original question was about using using a hardware debugger.
> Clearly using gdb/gdbserver is for apps only, AFAIK.  Does one
> bother with a h/w debugger for apps?  Using kgdb with some kind

Actually, yes, you can.  I believe at least the Abatron BDI can do
this.  Could be wrong, though.

> of remote debug-agent would be a "system level debugger", a s/w
> solution to a traditional hardware only debug aid.  At this time
> kind of pointless, as its painful to setup and JTAG debuggers
> are so cheap (for mainline CPUs).

Depends on your platform.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer

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