From owner-freebsd-arm@freebsd.org Thu Oct 22 12:41:00 2015 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AD7A2A1CB72 for ; Thu, 22 Oct 2015 12:41:00 +0000 (UTC) (envelope-from mattia.rossi.mailinglists@gmail.com) Received: from mail-wi0-x22d.google.com (mail-wi0-x22d.google.com [IPv6:2a00:1450:400c:c05::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 42E3D1DF9 for ; Thu, 22 Oct 2015 12:41:00 +0000 (UTC) (envelope-from mattia.rossi.mailinglists@gmail.com) Received: by wicfv8 with SMTP id fv8so118167898wic.0 for ; Thu, 22 Oct 2015 05:40:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-type:content-transfer-encoding; bh=KKwjS/GGubrP8/ep8qkq8Eje/L1mr7X6cMJMnGPTabw=; b=Tb/MkWpECVioCRLw4rcdGR/1qzsm/zFWWCOmP73Eu7D2SnLLPScoAFARrXR0uq6x1U nC4OeUiCv3xZdFvn/V6tk3SGmIbCkD9a2W+FmJWlaj7d2hnS/G9AZ0frgp1gqNtXfdlq bKJZITmra4lhIygqb6fAJqbDDdc8YdgW9uemLi4Rt+9apJTEJ9HTW+G9ctT47mdGaZZu f61OdmolBKgnqOimABS4ZHmd2Fo3tuiwtGhz+XKTSagAOnRtaoST0Ea0L77DVraUnOEW /CNOjuDstb19vKbdgB4EvKNkbr80uiyRgDaAzy1X3SBuUUMWRkw06Nrvnx4TA7oxb5GJ koSA== X-Received: by 10.180.39.162 with SMTP id q2mr27427230wik.12.1445517658382; Thu, 22 Oct 2015 05:40:58 -0700 (PDT) Received: from ?IPv6:2001:1620:ff0:c51:d995:61c4:e64:8acc? ([2001:1620:ff0:c51:d995:61c4:e64:8acc]) by smtp.googlemail.com with ESMTPSA id bv2sm16641027wjc.11.2015.10.22.05.40.57 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 22 Oct 2015 05:40:57 -0700 (PDT) Subject: Re: CC core dumping with CLANG 3.7 on armv5 - DREAMPLUG To: Konstantin Belousov References: <5626144F.9060003@gmail.com> <5628873F.7050509@gmail.com> <20151022081551.GB2257@kib.kiev.ua> <5628B0B0.8040804@gmail.com> <20151022111407.GD2257@kib.kiev.ua> Cc: freebsd-arm From: Mattia Rossi Message-ID: <5628D958.4060904@gmail.com> Date: Thu, 22 Oct 2015 14:40:56 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <20151022111407.GD2257@kib.kiev.ua> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 12:41:00 -0000 Am 22.10.2015 um 13:14 schrieb Konstantin Belousov: > On Thu, Oct 22, 2015 at 11:47:28AM +0200, Mattia Rossi wrote: >>> You may disassemble the instruction at the address, and print the content >>> of registers: >>> (gdb) disassemble *0x01eb0868-8,0x01eb0868+8 >>> (gdb) info registers >>> >>> If the cause of your issue is weird codegeneration on ARMv5, it might be >>> seen from the data above. On the other hand, this would not help if the >>> issue is algorithmic. I am afraid there is not much more to suggest. >> (gdb) disassemble *0x01eb0868-8,0x01eb0868+8 >> No function contains specified address. > Apparently correct syntax is > disassemble 0x01eb0868-8 0x01eb0868+8 (gdb) bt #0 0x01eb0868 in ?? () (gdb) disassemble 0x01eb0868-8 0x01eb0868+8 Dump of assembler code from 0x1eb0860 to 0x1eb0870: 0x01eb0860: add r12, r12, #1 ; 0x1 0x01eb0864: and r7, r0, r3 0x01eb0868: ldr r1, [r10, r7, lsl #2] 0x01eb086c: cmp r1, #0 ; 0x0 End of assembler dump. (gdb) info registers r0 0x1e53b 124219 r1 0x6a 106 r2 0xc3c3c3c6 -1010580538 r3 0x5a5a5a59 1515870809 r4 0x3 3 r5 0x1fd9f83 33398659 r6 0x1e53b 124219 r7 0x4019 16409 r8 0x22a1708c 581005452 r9 0xffffffff -1 r10 0x5a5a5a5a 1515870810 r11 0xbfbfeb70 -1077941392 r12 0x1 1 sp 0xbfbfeb48 -1077941432 lr 0x8f5c 36700 pc 0x1eb0868 32180328 fps 0x0 0 cpsr 0x60000010 1610612752 (gdb) Still I can't tell anything from that :-/ - way too low level for me