Re: [ECOS] GDB stub for RAM startup.

[Ottawa Guy <ottawaguy81 at yahoo dot com>]

Hi Jonathan,
Thanks for the response. Thanks for pointing out the
option.
I have few more more question. I am having problem
doing single step in command line GDB. Following is
what I am doing.

In my application main() function, I call
"breakpoint()".Once my programs start up it would hit
the breakpoint(), thus starting up my GDBs stub. Now I
use the normal gdb client to connect to my target.

linux > sparc-elf-gdb -s helloWorld.out
(gdb) target extended-remote /dev/ttyS1
Remote debugging using /dev/ttyS1
0x010075f0 in _breakinst ()
    at
/users/hdewan/ecos/ecos-2.0/packages/language/c/libc/startup/v2_0/src/atexit.cxx:85
85      cyg_libc_invoke_atexit_handlers( void )
Current language:  auto; currently c++
(gdb) step

As you can see my breakpoint is at 0x010075f0. Is the
"step" command suppose to single step in my program?

After dumping the packet I saw GDB client started to 
download the file into the target. Why cannt I just do
single step without downloading the program again.
              Thanks again 
                    Ottawa



--- Jonathan Larmour <jifl@eCosCentric.com> wrote:
> Ottawa Guy wrote:
> > Hello everyone,
> > I have a general question about GDB STUB. I have
> > ported GDB stub for my sparc target. 
> > 
> > I download my application code along with all my
> stub
> > in to the SDRAM of my target. Inside my
> application
> > code main() function, I call breakpoint(). This
> forces
> > my application to start listening for GDB command.
> > 
> > Now I startup my gdb host program with '-s' option
> to
> > load the symbol table. Then use the "target
> > extented-remote" to connect to my target. 
> > 
> > Now here is my question, I should be able to use
> > "step" command to step my application code right.
> > 
> > I was also able to use my sparc-elf-insight
> software
> > to connect to the target, however when I execute
> > "run", "insight" downloads the application code.
> How
> > can I stop this. I want the sparc-elf-insight to
> > single step without downloading the code again.
> 
> It's an option under something like File->Target
> Settings... and then "More 
> options". Or you can use the command line which
> gives you more control.
> 
> Jifl
> -- 
> eCosCentric    http://www.eCosCentric.com/    The
> eCos and RedBoot experts
> Visit us at Embedded World 2004, Nürnberg, Germany,
> 17-19 Feb, Stand 12-449
> --["No sense being pessimistic, it wouldn't work
> anyway"]-- Opinions==mine
> 


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