From owner-cvs-src@FreeBSD.ORG Thu Jan 17 21:52:43 2008 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9829816A419; Thu, 17 Jan 2008 21:52:43 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from speedfactory.net (mail.speedfactory.net [66.23.216.219]) by mx1.freebsd.org (Postfix) with ESMTP id 4DBEE13C478; Thu, 17 Jan 2008 21:52:43 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (unverified [66.23.211.162]) by speedfactory.net (SurgeMail 3.8s) with ESMTP id 228877987-1834499 for multiple; Thu, 17 Jan 2008 16:50:54 -0500 Received: from localhost.corp.yahoo.com (john@localhost [127.0.0.1]) (authenticated bits=0) by server.baldwin.cx (8.13.8/8.13.8) with ESMTP id m0HLqdHn084980; Thu, 17 Jan 2008 16:52:39 -0500 (EST) (envelope-from jhb@freebsd.org) From: John Baldwin To: src-committers@freebsd.org Date: Thu, 17 Jan 2008 16:52:30 -0500 User-Agent: KMail/1.9.7 References: <200801172143.m0HLhCm8016953@repoman.freebsd.org> In-Reply-To: <200801172143.m0HLhCm8016953@repoman.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200801171652.31546.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (server.baldwin.cx [127.0.0.1]); Thu, 17 Jan 2008 16:52:39 -0500 (EST) X-Virus-Scanned: ClamAV 0.91.2/5493/Thu Jan 17 13:09:26 2008 on server.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-4.4 required=4.2 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.1.3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on server.baldwin.cx Cc: cvs-src@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/gnu/usr.bin/gdb/kgdb kgdb.h main.c trgt.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2008 21:52:43 -0000 On Thursday 17 January 2008 04:43:12 pm John Baldwin wrote: > jhb 2008-01-17 21:43:12 UTC > > FreeBSD src repository > > Modified files: > gnu/usr.bin/gdb/kgdb kgdb.h main.c trgt.c > Log: > Add a new 'add-kld ' command to kgdb to make it easier to analyze > crash dumps with kernel modules. The command is basically a wrapper > around add-symbol-file except that it uses the kernel linker data > structures and the ELF section headers of the kld to calculate the > section addresses add-symbol-file needs. Forgot to say: Tested on: i386, amd64 A sample run on i386: > sudo ./kgdb -c /usr/crash/vmcore.10 /boot/kernel/kernel ... crash: blow the kernel stack on purpose Fatal double fault: eip = 0xc05c6220 esp = 0xe61b0000 ebp = 0xe61b0018 panic: double fault KDB: enter: panic ... (kgdb) where #0 doadump () at pcpu.h:195 #1 0xc05d399c in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:417 #2 0xc05d3c0a in panic (fmt=Variable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:571 #3 0xc08115d9 in dblfault_handler () at /usr/src/sys/i386/i386/trap.c:927 #4 0xc05c6220 in mtx_pool_setup_dynamic () #5 0xc065e125 in arc4rand (ptr=0xe61b0168, len=4, reseed=0) at /usr/src/sys/libkern/arc4random.c:142 #6 0xc065e171 in arc4random () at /usr/src/sys/libkern/arc4random.c:150 #7 0xc3d43402 in ?? () #8 0xb15ac28c in ?? () #9 0x793b5626 in ?? () #10 0xe61b018c in ?? () #11 0xc3d43410 in ?? () #12 0xbc8e58bf in ?? () ... (kgdb) add-kld crash.ko add symbol table from file "/boot/modules/crash.ko.symbols" at .text_addr = 0xc3d416f0 .data_addr = 0xc3d44000 .bss_addr = 0xc3d44254 .rodata_addr = 0xc3d4364e Reading symbols from /boot/modules/crash.ko.symbols...done. (kgdb) where #0 doadump () at pcpu.h:195 #1 0xc05d399c in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:417 #2 0xc05d3c0a in panic (fmt=Variable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:571 #3 0xc08115d9 in dblfault_handler () at /usr/src/sys/i386/i386/trap.c:927 #4 0xc05c6220 in mtx_pool_setup_dynamic () #5 0xc065e125 in arc4rand (ptr=0xe61b0168, len=4, reseed=0) at /usr/src/sys/libkern/arc4random.c:142 #6 0xc065e171 in arc4random () at /usr/src/sys/libkern/arc4random.c:150 #7 0xc3d43402 in blow_stack () at crash.c:773 #8 0xc3d43410 in blow_stack () at crash.c:764 #9 0xc3d43410 in blow_stack () at crash.c:764 #10 0xc3d43410 in blow_stack () at crash.c:764 #11 0xc3d43410 in blow_stack () at crash.c:764 #12 0xc3d43410 in blow_stack () at crash.c:764 #13 0xc3d43410 in blow_stack () at crash.c:764 #14 0xc3d43410 in blow_stack () at crash.c:764 #15 0xc3d43410 in blow_stack () at crash.c:764 #16 0xc3d43410 in blow_stack () at crash.c:764 #17 0xc3d43410 in blow_stack () at crash.c:764 #18 0xc3d43410 in blow_stack () at crash.c:764 #19 0xc3d43410 in blow_stack () at crash.c:764 -- John Baldwin