[Dwarf-Discuss] DWARF on systems where memory is not byte addressable

Michael Eager eager@eagercon.com
Thu Jul 26 20:02:12 GMT 2012

On 07/26/2012 12:29 PM, Robinson, Paul wrote:

> Michael Eager wrote:
>> Word-oriented platforms which have byte-addressable memory seems be a
>> self-contradiction.
> The PDP-10 (my first machine) was a 36-bit word-addressable machine.
> It had a "byte pointer" format that could specify an arbitrary byte within a
> word. So, there was a hardware-defined bit pattern to specify any given
> byte in memory, and instructions that could load and store just that byte.
> Nobody ever described the PDP-10 as byte-addressable, but you could
> make a pedantic argument for it.

So were several Burroughs machines.  None had byte addressable memory.
Each that I'm acquainted with (and many other architectures) have
instructions which will extract a sub-word value from an addressable unit.

DWARF describes data in terms of memory addressable units.  Let's not
let contrived arguments confuse the issue.

Michael Eager	 eager at eagercon.com
1960 Park Blvd., Palo Alto, CA 94306  650-325-8077

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