Re: PDP-10

[lars brinkhoff <lars at nocrew dot org>]

Andrew Cagney <ac131313@cygnus.com> writes:
> lars brinkhoff wrote:
> > I'm delighted to read, in the first chapter of GDB Internals, that GDB
> > should be able to run everywhere.  Next year, I may be working on a
> > port to PDP-10, which is a 36-bit word-adressed machine.  It's running
> > the TOPS-20 operating system.  Does this seem to be possible?
> 
> It may take a little (lot of) work :-(  findvar.c contains:
> 
>   /* Basic byte-swapping routines.  GDB has needed these for a long
>      time...  All extract a target-format integer at ADDR which is LEN
>      bytes long.  */
> 
>   #if TARGET_CHAR_BIT != 8 || HOST_CHAR_BIT != 8
>     /* 8 bit characters are a pretty safe assumption these days, so we
>        assume it throughout all these swapping routines.  If we had to
>        deal with 9 bit characters, we would need to make len be in bits
>        and would have to re-write these routines...  */
>   you lose
>   #endif

I'm willing to give it a try.  Would it be acceptable for inclusion in
GDB?