From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-return-20096-listarch-gdb=sources.redhat.com@sources.redhat.com>
Received: (qmail 16786 invoked by alias); 9 Nov 2004 20:58:11 -0000
Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm
Precedence: bulk
List-Subscribe: <mailto:gdb-subscribe@sources.redhat.com>
List-Archive: <http://sources.redhat.com/ml/gdb/>
List-Post: <mailto:gdb@sources.redhat.com>
List-Help: <mailto:gdb-help@sources.redhat.com>, <http://sources.redhat.com/ml/#faqs>
Sender: gdb-owner@sources.redhat.com
Received: (qmail 16768 invoked from network); 9 Nov 2004 20:58:09 -0000
Received: from unknown (HELO mx1.redhat.com) (66.187.233.31)
  by sourceware.org with SMTP; 9 Nov 2004 20:58:09 -0000
Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254])
	by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id iA9Kw39g015035
	for <gdb@sources.redhat.com>; Tue, 9 Nov 2004 15:58:08 -0500
Received: from localhost.redhat.com (to-dhcp51.toronto.redhat.com [172.16.14.151])
	by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id iA9Kw3r09887;
	Tue, 9 Nov 2004 15:58:03 -0500
Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1])
	by localhost.redhat.com (Postfix) with ESMTP id 29B08129D8C;
	Tue,  9 Nov 2004 15:57:05 -0500 (EST)
Message-ID: <41912F1E.2000606@gnu.org>
Date: Tue, 09 Nov 2004 21:54:00 -0000
From: Andrew Cagney <cagney@gnu.org>
User-Agent: Mozilla Thunderbird 0.8 (X11/20041020)
MIME-Version: 1.0
To: gdb@sources.redhat.com
Subject: METHOD_PTR_*?
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-SW-Source: 2004-11/txt/msg00089.txt.bz2

Hello,

 From value.h:

/* Pointer to member function.  Depends on compiler implementation.  */

#define METHOD_PTR_IS_VIRTUAL(ADDR)  ((ADDR) & 0x80000000)
#define METHOD_PTR_FROM_VOFFSET(OFFSET) (0x80000000 + (OFFSET))
#define METHOD_PTR_TO_VOFFSET(ADDR) (~0x80000000 & (ADDR))

It also depends on the underlying architecture - not very 64-bit 
friendly :-/

Andrew