From owner-freebsd-hackers@freebsd.org Mon May 11 11:57:13 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 029792DF05A; Mon, 11 May 2020 11:57:13 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 49LKDR3spgz4S6C; Mon, 11 May 2020 11:57:11 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id 04BBuvdS029967 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Mon, 11 May 2020 14:57:00 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 04BBuvdS029967 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id 04BBuuIa029966; Mon, 11 May 2020 14:56:56 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Mon, 11 May 2020 14:56:56 +0300 From: Konstantin Belousov To: freebsd@sysctl.cz Cc: freebsd-hackers@freebsd.org, Freebsd emulation Subject: Re: Debug linux binary with enable linux emulation Message-ID: <20200511115656.GF68906@kib.kiev.ua> References: <24f30eaa0597d79ddadc10d6f993f2a0@sysctl.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <24f30eaa0597d79ddadc10d6f993f2a0@sysctl.cz> X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on tom.home X-Rspamd-Queue-Id: 49LKDR3spgz4S6C X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=gmail.com (policy=none); spf=softfail (mx1.freebsd.org: 2001:470:d5e7:1::1 is neither permitted nor denied by domain of kostikbel@gmail.com) smtp.mailfrom=kostikbel@gmail.com X-Spamd-Result: default: False [-2.00 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; DMARC_POLICY_SOFTFAIL(0.10)[gmail.com : No valid SPF, No valid DKIM,none]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FREEMAIL_FROM(0.00)[gmail.com]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; HAS_XAW(0.00)[]; R_SPF_SOFTFAIL(0.00)[~all:c]; IP_SCORE_FREEMAIL(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; IP_SCORE(0.00)[ip: (-3.04), ipnet: 2001:470::/32(-4.08), asn: 6939(-3.14), country: US(-0.05)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 May 2020 11:57:13 -0000 On Mon, May 11, 2020 at 12:28:23AM +0200, freebsd@sysctl.cz wrote: > Hi, > I tried debug with gdb for linux emulation > and have issue with kernel panic. > > kldload linux64.ko > gdb ./Discord or other linux binary > > Fatal trap 12: page fault while in kernel mode > cpuid = 3; apic id = 03 > fault virtual address = 0x18 > fault code = supervisor read data, page not present > instruction pointer = 0x20:0xffffffff82f5b682 > stack pointer = 0x28:0xfffffe00691fd980 > frame pointer = 0x28:0xfffffe00691fd9e0 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 17392 (fish) > trap number = 12 > panic: page fault > cpuid = 3 > time = 1589132677 > KDB: stack backtrace: > #0 0xffffffff80c1d2f7 at kdb_backtrace+0x67 > #1 0xffffffff80bd062d at vpanic+0x19d > #2 0xffffffff80bd0483 at panic+0x43 > #3 0xffffffff810a7dcc at trap_fatal+0x39c > #4 0xffffffff810a7e19 at trap_pfault+0x49 > #5 0xffffffff810a740f at trap+0x29f > #6 0xffffffff81081bdc at calltrap+0x8 > #7 0xffffffff82f503d1 at linux_thread_detach+0x21 Show the line number for linux_thread_detach+0x21. Or better, compile with INVARIANTS, it should fire an assertion. Then get a core dump. > #8 0xffffffff80be5acf at thread_suspend_check+0x41f > #9 0xffffffff80c32ed9 at ast+0x3b9 > #10 0xffffffff810850e9 at doreti_ast+0x1f > Uptime: 2h56m24s > Dumping 1146 out of 8042 > MB:..2%..12%..21%..31%..41%..51%..62%..72%..81%..91%---<>--- > Copyright (c) 1992-2019 The FreeBSD Project. > > GNU gdb (GDB) 9.1 [GDB v9.1 for FreeBSD] > Copyright (C) 2020 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 "x86_64-portbld-freebsd12.1". > 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 /boot/kernel/kernel... > (No debugging symbols found in /boot/kernel/kernel) > 0xffffffff80c01eda in sched_switch () > (kgdb) > (kgdb) > (kgdb) bt > #0 0xffffffff80c01eda in sched_switch () > #1 0xffffffff80bdbfa2 in mi_switch () > #2 0xffffffff80c2bb75 in sleepq_catch_signals () > #3 0xffffffff80c2be64 in sleepq_timedwait_sig () > #4 0xffffffff80bdb9a5 in _sleep () > #5 0xffffffff80bf1ee3 in umtxq_sleep () > #6 0xffffffff80bf1c90 in do_wait () > #7 0xffffffff80bef8fe in __umtx_op_wait_uint_private () > #8 0xffffffff810a8984 in amd64_syscall () > #9 > #10 0x000000080974dedc in ?? () > Backtrace stopped: Cannot access memory at address 0x7fffffffddc8 > > I have now kernel without debug symbols. > > M. > _______________________________________________ > freebsd-emulation@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-emulation > To unsubscribe, send any mail to "freebsd-emulation-unsubscribe@freebsd.org"