From: Wolfgang Denk <wd@denx.de>
To: "Joao Vicente" <joao.vicente@spectel.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Problem debugging ppc kernel with DDD/GDB/BDI2000 on a custom MPC8260 board
Date: Thu, 09 Oct 2003 14:38:07 +0200 [thread overview]
Message-ID: <20031009123812.E439CC59E4@atlas.denx.de> (raw)
In-Reply-To: Your message of "Thu, 09 Oct 2003 10:52:17 BST." <DEF39A0710293E489D45B10E06645CBD0243B1A7@dub-msx1.spectelcorp.com>
Dear Joao,
in message <DEF39A0710293E489D45B10E06645CBD0243B1A7@dub-msx1.spectelcorp.com> you wrote:
>
> I am trying to boot the ppc kernel on a MPC8260 based custom board.
...
> One of the doubts that I have is that when I look into the system.map file, it shows that the start address is at 0xc0000000 (as shown below)
>
> c0000000 T _start
Yes, this is the correct kernel virtual address.
> To the best of my knowledge the kernel image is not relocatable, so I am wondering if this could be my problem or just one of them ...
> Should the map file be showing
>
> 00000000 T _start
No!!!
> If so, where should I change the .text address so that that happens ?
Don't change anything!
> I am also trying to debug the code from that address with gdb/BDI2000, but I am not getting very far.
> Basically I can see the program counter incrementing when I single step, but I cannot see the source even though I am trying to load the symbol table at 0x00000000 with the 'add-symbol-file vmlinux 0x00000000' gdb command, after invoking gdb from the k
> ernel base directory (where vmlinux is)
Just use the vmlinux file _without_ relocating any addresses. Make
sure to enable "MMU XLAT" and define "PTBASE" in your BDI config
file.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de
"If people are good only because they fear punishment, and hope for
reward, then we are a sorry lot indeed." - Albert Einstein
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-10-09 12:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-09 9:52 Problem debugging ppc kernel with DDD/GDB/BDI2000 on a custom MPC8260 board Joao Vicente
2003-10-09 12:38 ` Wolfgang Denk [this message]
[not found] <DEF39A0710293E489D45B10E06645CBD0243B1E7@dub-msx1.spectelcorp.com>
2003-10-09 16:18 ` Wolfgang Denk
2003-10-09 19:02 ` DONG-IN KANG
-- strict thread matches above, loose matches on Subject: below --
2003-10-10 10:23 Joao Vicente
[not found] <DEF39A0710293E489D45B10E06645CBD0243B232@dub-msx1.spectelcorp.com>
2003-10-10 13:00 ` Wolfgang Denk
2003-10-10 14:24 Joao Vicente
2003-10-15 17:47 Joao Vicente
2003-10-15 17:56 ` Wolfgang Denk
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