From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 101127 invoked by alias); 5 Nov 2019 18:50:46 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 101113 invoked by uid 89); 5 Nov 2019 18:50:45 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=0.0 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,HTML_MESSAGE,KAM_LOTSOFHASH,KAM_SHORT,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.1 spammy=hg0, ack, Hg0, qTStatus X-HELO: mail-ot1-f53.google.com Received: from mail-ot1-f53.google.com (HELO mail-ot1-f53.google.com) (209.85.210.53) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 05 Nov 2019 18:50:42 +0000 Received: by mail-ot1-f53.google.com with SMTP id m15so9799778otq.7 for ; Tue, 05 Nov 2019 10:50:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=pMPf2trR5pBCtIEPbI2exmrApEq0vUlah8G2rg3suOs=; b=DQ5a7hUXuySVffCBmYOcdSrOJPixA5gHaIrbtHz936l3E6Kl56Jy8RBvIva8hWdLVI sMNtiTpoKtwg8OJpastbHmA9VunuiRdzaGPpTHbfCOLAuYoi1S+LekN+DLMaU6Leyt/D 45KifG0xl1PUZsByFdAOr2NCmxTbk2EfrloFrM72bcNvHpZlS/Nirs7TR2qf+Y4p7y1D irgcZTNbjEuOOhVb0JnpBypSUxBrsiJDhAfT88usTeAjGiCzTTK7pa7kw3iYW6+gRtzO 0DlJ8q5iO6Otk0WykmwysN4Os8MFDmbaQr+jLoybqkXNeVPF1L118aUWn+7SVWc8u7K9 iBpQ== MIME-Version: 1.0 References: <5c9d0ab7-4e03-ea43-ae54-5d2aed0728e0@linaro.org> <0d7d8ede-1cae-c0cc-be35-05443dc5f073@linaro.org> <1b1ebf11-3e2c-d5b3-6a5b-50ed54e791bc@linaro.org> <07d83d2b-ed85-d97a-f071-74d383cd5986@linaro.org> In-Reply-To: <07d83d2b-ed85-d97a-f071-74d383cd5986@linaro.org> From: Reinoud Koornstra Date: Tue, 05 Nov 2019 18:50:00 -0000 Message-ID: Subject: Re: gdb 8.3.1 truncated register in remote g packet To: Luis Machado Cc: gdb@sourceware.org Content-Type: text/plain; charset="UTF-8" X-SW-Source: 2019-11/txt/msg00016.txt.bz2 Thanks Luis, I'm very interested what you'll find. Thanks, Reinoud. On Tue, Nov 5, 2019 at 4:49 AM Luis Machado wrote: > I've filed this as https://sourceware.org/bugzilla/show_bug.cgi?id=25162 > > I'll do some more investigation later and will update the ticket. > > On 11/5/19 1:05 AM, Reinoud Koornstra wrote: > > I tried to submit a bug, but it said the info output from gdb I'm trying > > to attach is spam and now my account is locked due to spam?....... > > Without pasting the gdb output this case doesn't have the info it needs, > > but the system thinks it's spam > > Thanks, Reinoud. > > > > On Mon, Nov 4, 2019 at 4:50 PM Luis Machado > > wrote: > > > > Hi Reinoud, > > > > On 11/4/19 2:52 PM, Reinoud Koornstra wrote: > > > > > > You might have gotten lucky. Or GDB wasn't too restrictive on > the > > > checks. > > > > > > > > > True > > > > > > > > > > > > > > Just to confirm, does your arm target have floating > point > > > registers? > > > > > > > > Good point, I did assume it has, because in some cases > > armeabihf was > > > > used to compile, but not in all cases, I'll check whether > > it is, > > > > otherwise I'd have to recompile gdb without hf. > > > > I'll get the info and let you know, thanks for helping out! > > > > > > > > > Yes, the arm cpu used has floating point registers > > > > > > > > > Well, it seems GDB assumes floating point registers are there > by > > > default, so there wouldn't be a need to build GDB > > specifically for that. > > > > > > > > > I did compile a gdb 7.7.1, i compiled earlier 7.0 (failed to > > compile > > > without removing Werror in bfd directory Makefile...), then I > tried > > > 7.4.1, but both of these versions didn't support remote baud rate. > > > However 7.7.1 worked nicely, well way better: (I did go echo g > > > > /proc/sysrq-trigger to get it waiting for gdb). > > > > This indicates something might have changed that made newer GDB's > > grumpy > > at your kgdb instance. > > > > Would you mind opening a ticket here ( > https://sourceware.org/bugzilla/) > > so we can track this properly? I'll do some more investigation. > > > > If you don't have an account i can do it for you, from information we > > exchanged through e-mail. > > > > > GNU gdb (GDB) 7.7.1 > > > Copyright (C) 2014 Free Software Foundation, Inc. > > > License GPLv3+: GNU GPL version 3 or later > > > > > > This is free software: you are free to change and redistribute it. > > > There is NO WARRANTY, to the extent permitted by law. Type "show > > copying" > > > and "show warranty" for details. > > > This GDB was configured as "--host=x86_64-unknown-linux-gnu > > > --target=arm-linux-gnueabihf". > > > Type "show configuration" for configuration details. > > > For bug reporting instructions, please see: > > > . > > > Find the GDB manual and other documentation resources online at: > > > . > > > For help, type "help". > > > Type "apropos word" to search for commands related to "word"... > > > Reading symbols from ./vmlinux...done. > > > (gdb) set serial baud 115200 > > > (gdb) set debug remote 1 > > > (gdb) target remote /dev/ttyUSB4 > > > Remote debugging using /dev/ttyUSB4 > > > Sending packet: $qSupported:multiprocess+;qRelocInsn+#2a...Ack > > > Packet received: > > > Packet qSupported (supported-packets) is NOT supported > > > Sending packet: $Hg0#df...Ack > > > Packet received: OK > > > Sending packet: $qTStatus#49...Ack > > > Packet received: > > > Packet qTStatus (trace-status) is NOT supported > > > Sending packet: $?#3f...Ack > > > Packet received: S05 > > > Sending packet: $Hc-1#09...Ack > > > Packet received: OK > > > Sending packet: $qC#b4...Ack > > > Packet received: QC1fbb > > > Sending packet: $qAttached#8f...Ack > > > Packet received: > > > Packet qAttached (query-attached) is NOT supported > > > Sending packet: $qOffsets#4b...Ack > > > Packet received: > > > Sending packet: $g#67...Ack > > > Packet received: > > > > > > 0000000001000000b0829e80ac829e8054829880b4a698806700000013000060060000000000000000000000cc5e0bbfd05e0bbfc05e0bbf10200a80581f0a8000000000000000000000000000000000000000000000000000000000000000000000000000000000 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f54,4#c6...Ack > > > Packet received: 4ef07ff5 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f54,4#c6...Ack > > > Packet received: 4ef07ff5 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f54,4#c6...Ack > > > Packet received: 4ef07ff5 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f54,4#c6...Ack > > > Packet received: 4ef07ff5 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > Sending packet: $m800a1f58,4#ca...Ack > > > Packet received: ffdeffe7 > > > 0x800a1f58 in arch_kgdb_breakpoint () at > > kernel/debug/debug_core.c:1049 > > > 1049 kernel/debug/debug_core.c: No such file or directory. > > > Sending packet: $qSymbol::#5b...Ack > > > Packet received: > > > Packet qSymbol (symbol-lookup) is NOT supported > > > (gdb) set debug remote 0 > > > (gdb) bt full > > > #0 0x800a1f58 in arch_kgdb_breakpoint () at > > kernel/debug/debug_core.c:1049 > > > No locals. > > > #1 kgdb_breakpoint () at kernel/debug/debug_core.c:1050 > > > No locals. > > > #2 0x800a2010 in sysrq_handle_dbg (key=0) at > > kernel/debug/debug_core.c:810 > > > No locals. > > > #3 0x80367308 in __handle_sysrq (key=103, check_mask=false) at > > > drivers/tty/sysrq.c:535 > > > op_p = 0x8098a6b4 > > > orig_log_level = 6 > > > i = -2137479500 > > > flags = 1610612755 > > > #4 0x8036745c in write_sysrq_trigger (file=0x0 <__vectors_start>, > > > buf=0x1 <__vectors_start> > 0x1>, > > > count=2, ppos=0x809e82ac ) at > drivers/tty/sysrq.c:1083 > > > No locals. > > > #5 0x80177e18 in proc_reg_write (file=0x0 <__vectors_start>, > > buf=0x1 > > > <__vectors_start> , > > > count=2157871792, ppos=0xbf0b5f78) at fs/proc/inode.c:224 > > > write = 0xbf0b5ed0 > > > rv = 0 > > > #6 0x8011fba4 in vfs_write (file=0xbe37bcc0, buf=0xaa408 > > > "g\nyS0,115200\n", '\337' , sequence > > > \337>..., count=2157871792, pos=0xbf0b5f78) at fs/read_write.c:485 > > > No locals. > > > #7 0x801201d4 in SYSC_write (count=, > buf= > > out>, fd=) at fs/read_write.c:534 > > > pos = 0 > > > #8 SyS_write (fd=0, buf=697352, count=2) at fs/read_write.c:526 > > > ret = 0 > > > #9 0x8000f760 in ?? () > > > No symbol table info available. > > > Backtrace stopped: previous frame identical to this frame > > (corrupt stack?) > > >