From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12577 invoked by alias); 19 Nov 2002 20:09:28 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 12570 invoked from network); 19 Nov 2002 20:09:25 -0000 Received: from unknown (HELO crack.them.org) (65.125.64.184) by sources.redhat.com with SMTP; 19 Nov 2002 20:09:25 -0000 Received: from nevyn.them.org ([66.93.61.169] ident=mail) by crack.them.org with asmtp (Exim 3.12 #1 (Debian)) id 18EGYo-0003eQ-00; Tue, 19 Nov 2002 16:09:34 -0600 Received: from drow by nevyn.them.org with local (Exim 3.36 #1 (Debian)) id 18EEho-0002S5-00; Tue, 19 Nov 2002 15:10:44 -0500 Date: Tue, 19 Nov 2002 12:09:00 -0000 From: Daniel Jacobowitz To: Steven Johnson , gdb@sources.redhat.com, jimb@redhat.com Subject: Re: Internal error in GDB Message-ID: <20021119201044.GA29274@nevyn.them.org> Mail-Followup-To: Steven Johnson , gdb@sources.redhat.com, jimb@redhat.com References: <3DD351ED.7000409@neurizon.net> <20021114151528.GA14693@nevyn.them.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20021114151528.GA14693@nevyn.them.org> User-Agent: Mutt/1.5.1i X-SW-Source: 2002-11/txt/msg00230.txt.bz2 On Thu, Nov 14, 2002 at 10:15:28AM -0500, Daniel Jacobowitz wrote: > On Thu, Nov 14, 2002 at 05:34:05PM +1000, Steven Johnson wrote: > > Im getting the error: > > > > Internal error: pc 0x0 in read in psymtab, but not in symtab. > > > > from a very recent CVS build of GDB (As of 11th November). > > > > It happens when I set breakpoints in an assembler file, that has been > > assembled through GCC, using the C Preprocessor (.S file, not .s file). > > > > It does nothing wrong, except pop up all the time and hence interfere > > with debugging significantly. (Im using insight and have to keep > > pressing OK to continue). > > > > I searched the code and it seems to be coming from > > symtab.c:find_pc_sect_symtab (last if in the function) Jim, I need your opinion on this... here's the problem. 2092 /* When using the GNU linker, .gnu.linkonce. sections are used to 2093 eliminate duplicate copies of functions and vtables and such. 2094 The linker will arbitrarily choose one and discard the others. 2095 The AT_*_pc values for such functions refer to local labels in 2096 these sections. If the section from that file was discarded, the 2097 labels are not in the output, so the relocs get a value of 0. 2098 If this is a discarded function, mark the pc bounds as invalid, 2099 so that GDB will ignore it. */ 2100 if (low == 0 && (bfd_get_file_flags (objfile->obfd) & HAS_RELOC) == 0) (top-gdb) 2101 return 0; 2102 In Steven's asm is a .vectors section which goes over the PPC hardware interrupt vectors in RAM - that's actually at VMA 0. Oops. Since LD still doesn't edit DWARF-2 sections when discarding, and won't for the forseeable future (although it needs to eventually), we can't just drop the check. Any ideas on what to do? -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer