From owner-freebsd-arm@freebsd.org Sat Jun 27 19:48:40 2020 Return-Path: Delivered-To: freebsd-arm@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 3FBA335B046 for ; Sat, 27 Jun 2020 19:48:40 +0000 (UTC) (envelope-from adr@sdf.org) Received: from mx.sdf.org (mx.sdf.org [205.166.94.22]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mx.sdf.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49vPSl0dXCz4NW4 for ; Sat, 27 Jun 2020 19:48:38 +0000 (UTC) (envelope-from adr@sdf.org) Received: from sdf.org (IDENT:adr@sdf.org [205.166.94.16]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 05RJmYrC000710 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Sat, 27 Jun 2020 19:48:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=sdf.org; s=default; t=1593287316; bh=CEYyHsAhkgKfHBcCNsXnGe5HdphmMpT+e/LfAxRjFd4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=a/22ByLDYa2yud1SfsgZIrtUsD2toEtahYUw3MOgpXZv8o6rDhrcpgx53bHVYbiZ3 FuPHdfU4UTjAgZRA/046RQYCs3PR9L91XnOcs3B+EvpqCQoEgQ0hxXcFdqbGGC8Y5h C4A6vTXF1LFFlwZUck4J706Le95iqwnoXqspyHks= Received: (from adr@localhost) by sdf.org (8.15.2/8.12.8/Submit) id 05RJmYws027769; Sat, 27 Jun 2020 19:48:34 GMT Date: Sat, 27 Jun 2020 19:48:34 +0000 From: adr@SDF.ORG To: Konstantin Belousov Cc: freebsd-arm@freebsd.org Subject: Re: calling mmap from assembly, invalid argument Message-ID: <20200627194834.GC22042@SDF.ORG> References: <20200627155110.GA22042@SDF.ORG> <20200627175835.GC32126@kib.kiev.ua> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200627175835.GC32126@kib.kiev.ua> X-Rspamd-Queue-Id: 49vPSl0dXCz4NW4 X-Spamd-Bar: +++++++ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=sdf.org header.s=default header.b=a/22ByLD; dmarc=none; spf=pass (mx1.freebsd.org: domain of adr@sdf.org designates 205.166.94.22 as permitted sender) smtp.mailfrom=adr@sdf.org X-Spamd-Result: default: False [7.02 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(0.00)[sdf.org:s=default]; GREYLIST(0.00)[pass,meta]; SH_AUTHBL_RECEIVED(4.00)[205.166.94.16:received]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(0.00)[+mx]; NEURAL_SPAM_SHORT(1.30)[1.295]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[SDF.ORG]; NEURAL_SPAM_MEDIUM(0.75)[0.753]; BAD_REP_POLICIES(0.10)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[sdf.org:+]; RCPT_COUNT_TWO(0.00)[2]; FROM_NO_DN(0.00)[]; NEURAL_SPAM_LONG(0.97)[0.970]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:14361, ipnet:205.166.94.0/24, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-Spam: Yes X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Jun 2020 19:48:40 -0000 On Sat, Jun 27, 2020 at 08:58:35PM +0300, Konstantin Belousov wrote: > Offset has off_t type which is 64 bit and requires proper alignment. > In this code, some random garbage on the stack is interpreted as offset. > > Our mmap(2) is strict by requiring offset equal to zero for MAP_ANON. > > You would see it yourself with either ktrace/kdump or truss. Thanks! adr.