[coldfire-gnu-discuss] Debugging from flash

[Corrin Meyer]

I am not really sure what is happening now...  Following is what I am
getting.

...
(gdb) target remote | m68k-elf-sprite pe: m52235evb
m68k-elf-sprite: Opening P&E USBMultilink port 1 (USB1 : USB-ML-CF REF :
M52235DEMO (PE60))
m68k-elf-sprite: Target reset
0x00000000 in __cs3_interrupt_vector_coldfire()
(gdb) b __cs3_reset
Breakpoint 1 at 0x400
(gdb) c
Continuing
Note: automatically using hardware breakpoints for read-only addresses.

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00000f62 in __cs3_isr_illegal_instruction ()
(gdb)

>> I am using the P&E Micro flash utility (CPROGCFZ) to flash the
ColdFire
>> on the board I am working on.  I would like to be able to debug the
>> running program using GDB.  The problem is that the error I am
getting
>> is right at boot and since the USB device can't be claimed by both
the
>> P&E Micro utility and the m68k-elf-sprite at the same time I have to
>> first flash it and then connect GDB to it but by that time it has
>> already run into the error.
>> 
>>  
>> 
>> I need to be able to tell the program to restart.  Normally I would
just
>> do a 'load' command within GDB but that will only work when running
from
>> RAM.  Is there anyway to restart a program that is already running in
>> flash?  I can't do a reset as then breakpoint set by GDB is cleared,
it
>> needs to be a software reset issued by GDB.
>
>When you start the sprite, unless you tell it not to, it resets the
>board.  So your program should be back at the reset vector when you
>connect from GDB.  Is that not happening?
>
>["load" works fine and programs flash if you have a non-Lite SG++, by
>the way :-)]
>
>-- 
>Daniel Jacobowitz
>CodeSourcery