From owner-freebsd-current@freebsd.org Fri Feb 26 02:04:04 2021 Return-Path: Delivered-To: freebsd-current@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 473C5551AA6 for ; Fri, 26 Feb 2021 02:04:04 +0000 (UTC) (envelope-from carpeddiem@gmail.com) Received: from mail-il1-f181.google.com (mail-il1-f181.google.com [209.85.166.181]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DmtHm1ZKQz4Z6k; Fri, 26 Feb 2021 02:04:03 +0000 (UTC) (envelope-from carpeddiem@gmail.com) Received: by mail-il1-f181.google.com with SMTP id z18so6745196ile.9; Thu, 25 Feb 2021 18:04:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=bULQ3qZn2d1WxM1g85MgKbMtipmTCkTX/mXWzetPuz0=; b=mPILzfIsUoL2EF71UFyTlpLvaSdGgsnf0Jr9Zzct6j8k67o/TSLwFjQqfMxtAQqeLu 3rRe1egBAiSERJfYbnds/AhQPROkHCUstW1YjoJh+YUBz+Qg2Oq2QIoCSoRIlPWac5+F VlJjxzqL5N71xDBKaIdJSJg3gav28Gb6MZDq1KWwgK+/+1lscHEtUN2yOi8suifWakQl rGtlRH3eahC+uFlq+ScGOMSMlo+OT3BUc4FVscf5cOE0YUWkNAVTek2WaK5ygKZJMBea vVDZuLmSg5TwJhVAY3oK5OPOvoZPefW0UNIMdBO62HVbt9WP0jK5PKr7LfK79b3olUK4 c6sQ== X-Gm-Message-State: AOAM531inwCDeVOP6DutGr8TRY/HskqjnTOuh5ndoPLuaSzRPPSsgU+I xUtGYsPOViDDPjE1O1Dw0+vgZWTB/Kn4JRF3Xo3AeUNK3m4= X-Google-Smtp-Source: ABdhPJzc2iy/zwRAUbYNa91bMnWtAxYH/z5vreAEwepqgxZYM/XmEha4LkFZ3Y062ZzKOXKK0N8LhGiEyDZOIWAOvD0= X-Received: by 2002:a92:d981:: with SMTP id r1mr539480iln.98.1614305042466; Thu, 25 Feb 2021 18:04:02 -0800 (PST) MIME-Version: 1.0 References: <20210225231028.GB69550@eureka.lemis.com> In-Reply-To: <20210225231028.GB69550@eureka.lemis.com> From: Ed Maste Date: Thu, 25 Feb 2021 21:03:43 -0500 Message-ID: Subject: Re: HEADS-UP: PIE enabled by default on main To: "Greg 'groggy' Lehey" Cc: FreeBSD Current Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 4DmtHm1ZKQz4Z6k X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Feb 2021 02:04:04 -0000 On Thu, 25 Feb 2021 at 18:10, Greg 'groggy' Lehey wrote: > > This details worries me. How compatible are PIE executables with > non-PIE executables? Can I run PIE executables on older systems? Can > I run older executables on a PIE system? There is no issue mixing PIE and non-PIE binaries, and they introduce no additional constraints on running on older kernels.