Re: gdbserver relocation?

[Daniel Jacobowitz <drow at mvista dot com>]

On Tue, Mar 04, 2003 at 11:27:46AM +0900, Miles Bader wrote:
> Andrew Cagney <ac131313 at redhat dot com> writes:
> > I suspect you want to send something back using qOffsets.
> 
> Yes, that's exactly what I needed.
> 
> What do you think of the following patch (I added the `handle_query'
> target callback, and then provided a linux-low.c implementation)?

It looks reasonable to me.  Do you have GDB copyright papers on file?

Content-Description: gdb-5.3-qoffsets-20030304.patch


> +      if (errno == 0)
> +	{
> +	  /* Both text and data offsets produced at compile-time (and so
> +	     used by gdb) are relative to the beginning of the program,
> +	     with the data segment immediately following the text segment.
> +	     However, the actual runtime layout in memory may put the data
> +	     somewhere else, so when we send gdb a data base-address, we
> +	     use the real data base address and subtract the compile-time
> +	     data base-address from it (which is just the length of the
> +	     text segment).  BSS immediately follows data in both cases.  */

Hmm, this only works if the executable is linked at 0 with data right
after text.  Is that the case for all/most uClinux targets?  I don't
know anything about uClinux.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer