gdb linux testing regressions (compared to 7/24)

[Jimmy Guo]

>   read_register_bytes:  Couldn't update register 16.
>
>   (gdb) FAIL: gdb.base/break.exp: hit breakpoint on called function
>   ...
>
>Your GDB is obviously having trouble getting at the floating point
>registers, and it is more than likely that this is related to the
>stuff I checked in yesterday.  However, I don't see directly what
>could be causing it.  On my machine everything works just fine.
>
>Can you give a bit more detail about your system (Linux version, libc
>version)?  And can you tell me whether HAVE_PTRACE_GETREGS and/or
>HAVE_PTRACE_GETFPXREGS are defined (by configure) in config.h?

I'm using redhat 6.1.  gcc egcs-2.91.66.  How to find out versions for
others like libc?  HAVE_PTRACE_GETREGS is defined,
HAVE_PTRACE_GETFPXREGS not.  

- Jimmy