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Re: GDB Issue on MPC837X

On 03/08/11 10:47, Chris Cuthbert wrote:

Forgot the RAM dump. Yes, there is no issue with RAM initialization because I can run the application from redboot prompt.

  RedBoot>  x -b 0x100000 -l 0x100 -4
  00100000: 3C600010 60630010 7C6803A6 4E800020
  00100010: 3C400059 604240F4 7C631A78 7C7C43A6
  00100020: 7C842278 7C9D43A6 48264035 3C200059
  00100030: 60214D70 7C3043A6 3C600010 606301C4
  00100040: 3C800000 60843000 90640014 90640024
  00100050: 90640028 90640038 3C600058 6063D070
  00100060: 3C800061 60842B20 38000000 7C032040
  00100070: 4182001C 7C832050 5484F0BE 7C8903A6
  00100080: 3863FFFC 94030004 4200FFFC 3C600058
  00100090: 6063C110 3C800058 6084D064 7C032040
  001000A0: 4182001C 7C832050 5484F0BE 7C8903A6
  001000B0: 3863FFFC 94030004 4200FFFC 3821FFF4
  001000C0: 38000000 90010000 90010008 9421FFC8
  001000D0: 48263A05 48263E85 482633E5 3C600000
  001000E0: 60633032 7C0004AC 7C600124 7C0004AC
  001000F0: 482634D9 48263785 48263161 4823A759
  RedBoot>


Does the program actually start execution at 0x100000?  Binaries on PowerPC
will typically start at something like 0x100100.  When you load the program
via RedBoot, it figures this out and the 'go' command jumps to the right
place.

Also, you could try loading the program via GDB, e.g.
  (gdb) tar rem XXX
  (gdb) lo <program>.elf
  (gdb) go


---------------------------------------- 
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: 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

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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--
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

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