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RE: GDB Issue on MPC837X

The redboot is a ROMRAM image and it starts in flash and then copies itself to RAM.
Then at redboot prompt I load the application image using ethernet to location 0x100000 in RAM (RAM starts at 0x00).
I can, at this point, say 'go 0x100000' and the applications runs fine but I can't seem to get it to run using gdb command.

Instead of running it from redboot prompt, I log out of the debug port and then I run powerpc-eabi-gdb on a linux box and then the rest is shown in the log.

Thanx for the reply.


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> Subject: RE: [ECOS] GDB Issue on MPC837X
> Date: Tue, 8 Mar 2011 06:01:18 -0800
> From: ccoutand@stmi.com
> To: nd6969@hotmail.com; ecos-discuss@ecos.sourceware.org
>
> Hi,
>
> How do you load the application in RAM? Are you building a ROMRAM type of application that relocates to RAM which you plan to debug using the GDB stubs? Can you dump the memory content at address 0x100000 and forward, is the memory initialized?
>
> Christophe
>
> -----Original Message-----
> From: ecos-discuss-owner@ecos.sourceware.org [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Chris Cuthbert
> Sent: 8. mars 2011 02:33
> To: ecos-discuss
> Subject: [ECOS] GDB Issue on MPC837X
>
>
> Hello,
>
> I am trying to get gdb working on a MPC847X ERDB eval board using the serial port.
> Basically, I cannot get gdb to start executing the application loaded in RAM at 0x100000.
> Logs below.
>
> Any help appreciated.
> Thanx.
>
> =~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2011.03.07 15:42:06 =~=~=~=~=~=~=~=~=~=~=~=
> (gdb) set debug serial 10
> (gdb) set debug remote 1
> (gdb) tar rem /dev/ttySI166
> Remote debugging using /dev/ttySI166
> Sending packet: $Hc-1#09...[
> r +]Ack
> [$][O][K][#][9][a]Packet received: OK
> Sending packet: $qC#b4...[+]Ack
> [$][E][0][2][#][a][7]Packet received: E02
> Sending packet: $qOffsets#4b...[+]Ack
> [$][#][0][0]Packet received:
> Sending packet: $?#3f...[+]Ack
> [$][S][0][4][#][b][7]Packet received: S04
> Sending packet: $Hg0#df...[+]Ack
> [$][O][K][#][9][a]Packet received: OK
> Sending packet: $g#67...[+]Ack
> [$][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][0][#][8][0]Packet received: 00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
> 0x0 in __lshrdi3 (u=0, b=0)
> (gdb)
> (gdb) jump *0x100000
> Line 16 is not in `__lshrdi3'.  Jump anyway? (y or n) y
> Continuing at 0x100000.
> Sending packet: $P40=00100000#72...[+]Ack
> [$][O][K][#][9][a]Packet received: OK
> Sending packet: $Hc0#db...[+]Ack
> [$][O][K][#][9][a]Packet received: OK
> Sending packet: $c#63...[+]Ack
> [$][T][0][4][4][0][:][0][0][1][0][0][0][0][0][;][0][1][:][0][0][0][0][0][0][0][0][;][#][6][8]Packet received: T0440:00100000;01:00000000;
>
> Program received signal SIGILL, Illegal instruction.
> 0x100000 in _stext () at include/exception:16
> 16  virtual ~exception () { }
> Current language:  auto; currently c++
> (gdb)
>
>
>
> --
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> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
>
 		 	   		  

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