From owner-freebsd-arm@freebsd.org Thu Oct 22 12:43:39 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 A4B77A1CCB5 for ; Thu, 22 Oct 2015 12:43:39 +0000 (UTC) (envelope-from mattia.rossi.mailinglists@gmail.com) Received: from mail-wi0-x236.google.com (mail-wi0-x236.google.com [IPv6:2a00:1450:400c:c05::236]) (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 49078111B for ; Thu, 22 Oct 2015 12:43:39 +0000 (UTC) (envelope-from mattia.rossi.mailinglists@gmail.com) Received: by wicll6 with SMTP id ll6so133551252wic.0 for ; Thu, 22 Oct 2015 05:43:37 -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=fmaVDuL+InWSQnYs1/45+6tV5VDKuij5a7AN3tSI8rA=; b=Mw6IQ6pwXPk5gx/45mlHUmGsKCxIjcBUQEAMzVH3RZpjSiA2IEmPSCk+zEdySJnKYc 4n09rN08hBWCvoqvZ/K1ctMWJJUHMXc4m0EbxmaHC8SjatrXKenpM8HqbdCSKpE5zwpp AYbiH2H1/wRBoUCZPOt4UK/knxnrYQoiDjVIpRRBoB+MjN/JKFRMyNfOAJ+EGa5btibG uI/hbyfv59HDltvYCmC1nxf6vdnWKt2BP5q3FRmIpC4EBJ/5TZjE6g7NDXL9cXZ4LLJr nHfRiJcAXaLt9k0q6njLZXd4RcMq+G9/b/fNG1vdCNj3tS8SC9MjC6BcDjrFgVa2EPz/ 7yKA== X-Received: by 10.180.188.45 with SMTP id fx13mr1375713wic.64.1445517817741; Thu, 22 Oct 2015 05:43:37 -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 o3sm27915573wif.22.2015.10.22.05.43.37 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 22 Oct 2015 05:43:37 -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> <5628D958.4060904@gmail.com> Cc: freebsd-arm From: Mattia Rossi Message-ID: <5628D9F8.8040206@gmail.com> Date: Thu, 22 Oct 2015 14:43:36 +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: <5628D958.4060904@gmail.com> 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 12:43:39 -0000 Am 22.10.2015 um 14:40 schrieb Mattia Rossi: > > > 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 Btw. I'm currently using a helloworld program for testing: root@dreamplug:~ # cat helloworld.c /* Hello World program */ #include main() { printf("Hello World"); } But the problem is independent of the input file