cross-debugging of userland core files, nat -> tdep

[Andrew Cagney]

> Hi folks...
> 
> I've been thinking of what needs to happen in order to support
> cross-debugging of userland core files in NetBSD.
> 
> BFD can already handle NetBSD ELF core files in the appropriate way.  As
> far as I can tell, the only stumbling block is getting GDB to play nicely
> with them.
> 
> The problem is that the functions that supply registers, etc. from the core
> file are all in "nat" modules.  This is probably mostly an artifact of the
> data being in the same format as the reg structure returned by ptrace(2).
> 
> What I'd like to do is move those supply-registers routines into an
> appropriate "tdep" file.  They can still be used by the "nat" routines
> which use ptrace(2), and all the core file handling goo can then go into
> the "tdep" module, as well.
> 
> If this sounds reasonable, then I'll start my little project.  Otherwise,
> I'd love to hear suggestions :-)
> 
> Thanks.

Have a look at sparc-tdep.c:supply_fpregset().  Depending on how 
``pure'' your elf core files are you could do similar.  If not 
archnbsd-tdep.c sounds promising.

There is a namespace problem here (these methods most likely also need 
to be multi-arched in someway, but that is a separate story).


Andrew