From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14225 invoked by alias); 3 Jun 2002 15:55:10 -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 14164 invoked from network); 3 Jun 2002 15:55:08 -0000 Received: from unknown (HELO sccrmhc02.attbi.com) (204.127.202.62) by sources.redhat.com with SMTP; 3 Jun 2002 15:55:08 -0000 Received: from ocean.lucon.org ([12.234.143.38]) by sccrmhc02.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20020603155507.EAGO11183.sccrmhc02.attbi.com@ocean.lucon.org>; Mon, 3 Jun 2002 15:55:07 +0000 Received: by ocean.lucon.org (Postfix, from userid 1000) id 69F3C125BB; Mon, 3 Jun 2002 08:55:06 -0700 (PDT) Date: Mon, 03 Jun 2002 08:55:00 -0000 From: "H . J . Lu" To: GDB , binutils@sources.redhat.com Subject: DW_CFA_def_cfa_offset_sf bug? (Re: Does gdb 5.2 support gcc 3.1.1 on Linux/mips?) Message-ID: <20020603085506.A26861@lucon.org> References: <20020602143627.A10506@lucon.org> <20020603010003.GA16363@branoic.them.org> <20020602194326.A14976@lucon.org> <20020603050101.GA18906@branoic.them.org> <20020602220534.B17122@lucon.org> <20020603050906.GA19164@branoic.them.org> <20020602224240.A17723@lucon.org> <20020602230331.A18107@lucon.org> <20020602231016.A18236@lucon.org> <20020603141808.GA24114@branoic.them.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020603141808.GA24114@branoic.them.org>; from drow@mvista.com on Mon, Jun 03, 2002 at 10:18:10AM -0400 X-SW-Source: 2002-06/txt/msg00025.txt.bz2 On Mon, Jun 03, 2002 at 10:18:10AM -0400, Daniel Jacobowitz wrote: > On Sun, Jun 02, 2002 at 11:10:16PM -0700, H . J . Lu wrote: > > On Sun, Jun 02, 2002 at 11:03:31PM -0700, H . J . Lu wrote: > > > > > > DW_CFA_17 is DW_CFA_offset_extended_sf, which was added to gcc on > > > 2002-01-30. I have verifed that gcc 3.1.1 does generate it for mips. > > > It looks like we have at least 2 bugs. First, readelf doesn't handle > > > DW_CFA_offset_extended_sf and maybe other DAWRF debug info generated > > > by gcc 3.1.1. Secondly, gdb 5.2 doesn't work with gcc 3.1.1 for > > > Linux/mips. > > > > dwarf2cfi.c in gdb 5.2 seems to support DW_CFA_offset_extended_sf. But > > that file is not used anywhere, at least not for Linux/x86 nor > > Linux/mips. Did I miss something? Shouldn't we fix gdb 5.2 and > > binutils for gcc 3.1.1? > > GDB doesn't need the CFA info on MIPS (although I'll try soon to let > GDB use it). Is that really what's making GDB choke? Have you looked > at Jakub's suggestion about gas and -gdwarf-2? > It has nothing to do with gas and -gdwarf-2. I used "gcc -c". I am trying to fix readelf first. While working on DW_CFA_def_cfa_offset_sf, I found: case DW_CFA_def_cfa_offset_sf: uoffset = read_uleb128 (objfile->obfd, &insn_ptr); ^^^^^^^^^^^^ fs->cfa_offset = uoffset; /* cfa_how deliberately not set. */ break; in dwarf2cfi.c in gdb 5.2. Shouldn't that be case DW_CFA_def_cfa_offset_sf: offset = read_sleb128 (objfile->obfd, &insn_ptr); ^^^^^^^^^^^^ fs->cfa_offset = offset; /* cfa_how deliberately not set. */ break; H.J.