Home » Language IDEs » C / C++ IDE (CDT) » GDB - function "main" not defined(GDB, BDI, U-Boot)
| GDB - function "main" not defined [message #540638] |
Wed, 16 June 2010 19:13  |
 stroumpf 
Messages: 3
Registered: June 2010 |
Junior Member |
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Hi,
First try to setup gdb,bdi and eclipse (3.5, CDT 6) to debug on remote target ends with the following error:
480-break-insert board.c:395
480^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x03004b04",func="board_init_f",file="board.c",line="395",times="0",original-location="board.c:395"}
(gdb)
481-data-list-changed-registers
481^done,changed-registers=....
(gdb)
482-break-insert -t main
482^error,msg="Function \"main\" not defined."
(gdb)
What about this step 482 ? where is this breakpoint set ?
As I try to debug some code in U-Boot, there is no main() function, but only bootstrap / relocate_code, etc
Any help much  appreciated !
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| Re: GDB - function "main" not defined [message #541074 is a reply to message #541026] |
Fri, 18 June 2010 08:49  |
John McCabe
Messages: 228
Registered: July 2009 |
Senior Member |
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On Fri, 18 Jun 2010 02:45:12 -0400, stroumpf
<david.andrey@netmodule.com> wrote:
>Hi,
>
>Quote:
>> I'm not sure what you're asking here. Are you saying that the gdb
>> console is saying gdb is trying to set a breakpoint on main, but that
>> you haven't set that up and it doesn't make sense to have it in this
>> case at all?
>
>Yes, exactly.
>Quote:
>> Are you using the GDB Hardware Debugging configuration?
>No, I was not. But now it's installed and used :)
>In the startup tab, I have following instr.
>target remote 172.16.76.111:2001
See later; you shouldn't need that as the JTAG Device section on the
Debugger tab should sort that out for you.
>monitor re
>monitor bi 0x03000100
See later; I guess that's equivalent to our 0xbfc00000!
>c
>Now, I can launch the debugger, but sources are not founded. In "Sources" tab, there is the default look-up path (absolute path on project)
>Any idea ?
Have you loaded the symbols?
>do you have a runing configuration gdb - bdi2000 ?
Yes. I have it working.
We're using the BDI2000 on a custom card to run a custom application.
The settings I've got are:
Main tab:
Project: ... the project I'm using
Build Configuration: Default (We use a Python build script so no
Makefiles or anything)
C/C++ Application: path to the debug version of the .elf file.
Debugger tab:
GDB Command: sde-gdb (for MIPS - sde-gdb is on my path)
Command Set: Standard (Windows)
Protocol Version: mi
Verbose console mode: Checked
Use remote target: Checked
JTAG Device: Abatron BDI2000
Host name or IP address: 10.10.200.210 (obviously needs to be your
BDI's IP address!)
Port number: 2001 (default)
Startup tab:
Reset and Delay: not checked
Halt: not checked
First box:
set endian little
set print pretty
monitor reset
monitor go 0xbfc00000 (our start address on the MIPS I think!)
monitor delay 2000
monitor halt
set remotelogfile gdblog.txt
monitor host 10.20.200.16 (IP address of our TFTP server)
monitor load mccabe/thestrippedsymbolsversionofthe.elf (previously
copied the stripped symbols elf file to the TFTP server)
Load image: not checked
Load symbols: checked
Symbols file name: ${workspace_loc:\....the name of the elf file in
the C/C++ Application box on the Main tab)
Symbols offset(hex): empty
Set program counter at(hex): not checked
Set breakpoint at: <my 'main' function - not called main()!>
Resume: checked
Run commands: empty
Source tab:
Source Lookup Path: Default only, which includes my source
Search for duplicate source files on the path: checked (I just got all
the code checked out from CVS and we have multiple versions in the
project. If I don't check this it finds the wrong file).
Common tab:
These are pretty much all the defaults.
So that's it. I sometimes have to reset the BDI to get it all to work.
I'm now using GDB Hardware Debugging on a very recent version of
Eclipse Helios. The only difference there is that I needed to select
the Standard GDB Hardware Debugging Launcher because the DSF based one
didn't work for me.
Hope this helps.
John
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