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Re: [h8300] increase dwarf address size

From: Jeff Law <law at redhat dot com>
To: DJ Delorie <dj at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 10 May 2012 09:11:10 -0600
Subject: Re: [h8300] increase dwarf address size
References: <201205100027.q4A0RELM022946@greed.delorie.com>

On 05/09/2012 06:27 PM, DJ Delorie wrote:

H8/300 cpus have a larger-than-64k address space, despite 16-bit
pointers.  OK to apply?  Ok for 4.7 branch?
See also http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48231

* config/h8300/h8300.h (DWARF2_ADDR_SIZE): Define as 4 bytes.

My recollection was that the H8/300 only had a 64k address space and that the larger address spaces showed up in later processors (H8/300H).

Regardless, shouldn't DWARF2_ADDR_SIZE be POINTER_SIZE / BITS_PER_UNIT? That'll give the larger DWARF2_ADDR_SIZE on the modern widgets, but still do the right thing for the ancient H8/300.

My other relevant recollection was that we don't support C++ on the H8/300 series.

jeff

Follow-Ups:
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References:
- [h8300] increase dwarf address size
  - From: DJ Delorie

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