From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-349221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 20907 invoked by alias); 6 Mar 2011 15:24:02 -0000
Received: (qmail 20898 invoked by uid 22791); 6 Mar 2011 15:24:01 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 06 Mar 2011 15:23:57 +0000
From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/48007] New: Unwind library doesn't work with UNITS_PER_WORD > sizeof (void *)
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: other
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: hjl.tools at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-48007-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Date: Sun, 06 Mar 2011 15:24:00 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2011-03/txt/msg00534.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48007

           Summary: Unwind library doesn't work with UNITS_PER_WORD >
                    sizeof (void *)
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


unwind-dw2.c has

/* This is the register and unwind state for a particular frame.  This
   provides the information necessary to unwind up past a frame and return
   to its caller.  */
struct _Unwind_Context
{
  void *reg[DWARF_FRAME_REGISTERS+1];
  void *cfa;
  void *ra;
  void *lsda;
  struct dwarf_eh_bases bases;
  /* Signal frame context.  */
#define SIGNAL_FRAME_BIT ((~(_Unwind_Word) 0 >> 1) + 1)
  /* Context which has version/args_size/by_value fields.  */
#define EXTENDED_CONTEXT_BIT ((~(_Unwind_Word) 0 >> 2) + 1)
  _Unwind_Word flags;
  /* 0 for now, can be increased when further fields are added to
     struct _Unwind_Context.  */
  _Unwind_Word version;
  _Unwind_Word args_size;
  char by_value[DWARF_FRAME_REGISTERS+1];
};

We can't save an integer register in void * if its size > size of
void *.