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Can not debug x-loader: Symbol main not defined

André Schaller
Intellectual 580 points

Hi, 

I am running CCS Version: 5.4.0.00091 and I want to debug x-loader on PandaBoard ES (OMAP4460). But it fails to show me the assembly. This is what I did

1. Created Makefeile project with existing code.

2. Tuned make command to build "make ift" and to clean "make distclean"

3. x-loader gets compiled succesfully -> copied MLO und uboot.bin to boot partition of sdcard

4. Created target configuration file for pandaboard es (however, if i test the configuration I got an error rate of 66,7% ...)

5. Added a debug configuration (code composer studio - device debugging) using the target config from step 4.

6. Set up the following changes in the debug config:

 a) Program > Project > Workspace >> x-loader

 b) Program > Program > Filesystem >> x-load

c) Program > Load symbols only

7. First strange thing, If i start debugging with the sd-card in my pandaboard (View > Target Configuratios > Richt-Click on the ccxml > Launch Selected Configuration > Right-Click on CortaxA9_0 -> Connect) Most of the time I get:

Error connecting to the target:
(Error -1141 @ 0x3D58)
Device is not responding to the request. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK).
(Emulation package 5.1.73.0)

So debugging only works for me with no sd card inserted. 

8. When I perform the same steps with no sd card, I proceed as follows: connect to A9_0, connect to A9_1, select A9_0; select SCRIPTS > Reset > reset_ducati_cortexM§_RTOS_board | reset_ducati_cortexM§_SIMCOP_board | rset_tesla_c64_board (one after another)

9. Run > Load > Load Symbols > x-load (now I can see some entries in View > Debug > Modules)

10. Run > Load > Load Program > x-load

A source window pops up reading: No source available for "0x324c6" 

The upper window reads: No symbols are defined for 0x40304360

Thow lower window reads: CortexA9_0: AutoRun: Target not run as the symbol "main" is not defined

I dont know what to do anymore. I was able to debug u-boot. Debugging x-loader fails for me every time. 

I just want to debug the ASM code in startup.S which is executed right after reset.

Any help would be appreciated.

Regards,

André

  • TI__Guru**** 463941 points

    Hi Andre,

    I am not an expert on x-loader so i can't comment on everything. But I can comment on:

    Andr�� Schaller said:

    A source window pops up reading: No source available for "0x324c6" 

    The upper window reads: No symbols are defined for 0x40304360

    This means that the debugger is unable to associate source code with the current address of the PC. The reasons can vary. One is that the symbols were generated with minimal debug information. Another is that that address does not correspond to any valid source file. You will need to determine if the symbols have the necessary debug information and if that is a valid address to debug.

    Andr�� Schaller said:
    Thow lower window reads: CortexA9_0: AutoRun: Target not run as the symbol "main" is not defined

    CCS, by default, will try to autorun to main on program load. If you do not have a main in your program, then it will give you that warning. I assume you do not have a 'main'.

    I also suggest posting in the OMAP forums. People there will be more familiar with debugging the device and trying to debug x-loader. You may get some good tips there too.

    Thanks

    ki