Re: [Patch H8/300] : Fix for crashing of gdb with" info f" command

[Andrew Cagney <cagney@gnu.org>]

> Hi
> Reference:http://sources.redhat.com/ml/gdb-patches/2004-06/msg00428.html
> 
> In the latest GDB(gdb+dejagnu-20040630) snap shot, the "info f" problem described in the above link is fixed. Referring through the links you have suggested, it is evident that h8300 target is not in the list of the new GDB frame structure. Is it possible to know what should be done from our side to update H8300 targets to the new frame work? Can you suggest how to go about it?
> 
> Thanks in advance.

Right,

A very simplistic cookbook is as follows:

- #if 0 all the set_gdbarch_deprecated ... lines
- build gdb
- try gdb on a simple program
   break main, info registers, stepi, nexti, ...
- fix an internal error due to missing method
- repeat

eventually you'll get gdb kind of working, at that point repeat the 
above using the testsuite.

It turns out that for architectures like this that use all the old 
deprecated methods, its quicker / easier to clear the deck and implement 
a new (borrowing heavily from the old code of course).

It also turns out that basic operations (break main; run, stepi, info 
registers) don't even need a frame unwinder - so that can be left as a 
separate pass.

For the unwinder, you need to convert the frame_saved_regs code into the 
frame_unwind_cache code (seen in more up-to-date architectures).

As for contributing this, perhaphs we can just incrementally submit the 
above in realtime?

Andrew