Dear Juan,
in message 3F57233D.8060305@nabla-designs.com you wrote:
My steps to debug the booter: o I've modified the config.mk file to enable the debug options DBGFLAGS = -g -DDEBUG. ( I haven't a u-boot.lds.debug for my board (lubbock). Do I need it ?)
If the code still links you don;t need it. With some board with embedded environment you need to use a different arrangement of object files in the image as sizes grow due to debugging code.
o Start my target, the jtag debugger is configured to stop the execution.
...
My question is, How can I debug the code __before__ the start_armboot function ? I would like to debug the assembler code from the first
Use "reset halt" and/or "startup reset" to stop the CPU right out of reset.
instruction ( I can do this with the jtag debugger but I can't see the related source instruction in the gdb ).
AFter reset, you can single step on instruction level ("si" in GDB) and display the current assembler code by defining a display like "d/i $pc"
Best regards,
Wolfgang Denk