From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gproxy2-pub.mail.unifiedlayer.com (gproxy2-pub.mail.unifiedlayer.com [69.89.18.3]) by sourceware.org (Postfix) with ESMTPS id C82CD3858D1E for ; Thu, 10 Feb 2022 20:58:36 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org C82CD3858D1E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=tromey.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=tromey.com Received: from cmgw12.mail.unifiedlayer.com (unknown [10.0.90.127]) by progateway4.mail.pro1.eigbox.com (Postfix) with ESMTP id 333D710047520 for ; Thu, 10 Feb 2022 20:58:36 +0000 (UTC) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with ESMTP id IGWRnOA6cXOyfIGWSnN1gf; Thu, 10 Feb 2022 20:58:36 +0000 X-Authority-Reason: nr=8 X-Authority-Analysis: v=2.4 cv=EucXEQQA c=1 sm=1 tr=0 ts=62057c7c a=ApxJNpeYhEAb1aAlGBBbmA==:117 a=ApxJNpeYhEAb1aAlGBBbmA==:17 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=oGFeUVbbRNcA:10:nop_rcvd_month_year a=Qbun_eYptAEA:10:endurance_base64_authed_username_1 a=2TSbW04mOeaghqWgRSsA:9 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date:References :Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=X0qG+4YQ+q4EnouVjjx+xMpMgGGGHsu3kCtshXXd0Jg=; b=SyJSeIGoPOnkqYZ+htlKLvAt0U 5cAX+5+F5CZ9iTclz3OI3qHryVmgSTQprAu9scOAkpjk3G74vkFZnf7Ey+Uic2snDfYl3RP4/+NPS 5RZntq4POyTgZRYIUAHOOPtfV; Received: from 75-166-128-165.hlrn.qwest.net ([75.166.128.165]:55994 helo=murgatroyd) by box5379.bluehost.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nIGWR-003oeR-Bs; Thu, 10 Feb 2022 13:58:35 -0700 From: Tom Tromey To: Andrew Burgess via Gdb-patches Cc: William Tambe , Andrew Burgess Subject: Re: Can gdbserver tunnel stdout/stdin to/from gdb ? References: <871r0daf5i.fsf@redhat.com> X-Attribution: Tom Date: Thu, 10 Feb 2022 13:58:34 -0700 In-Reply-To: <871r0daf5i.fsf@redhat.com> (Andrew Burgess via Gdb-patches's message of "Tue, 08 Feb 2022 09:20:09 +0000") Message-ID: <874k56tp51.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 75.166.128.165 X-Source-L: No X-Exim-ID: 1nIGWR-003oeR-Bs X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 75-166-128-165.hlrn.qwest.net (murgatroyd) [75.166.128.165]:55994 X-Source-Auth: tom+tromey.com X-Email-Count: 3 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-Spam-Status: No, score=-3025.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, JMQ_SPF_NEUTRAL, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Feb 2022 20:58:38 -0000 >> Can gdbserver tunnel stdout/stdin to/from gdb so as to debug an >> application as if it was executing on the machine running gdb ? Andrew> I don't believe gdbserver itself supports this feature. I wish it did though :) Andrew> Though I don't see why a Andrew> bigger target couldn't make use of that extension - you'd just need a Andrew> mechanism to intercept the syscalls at the remote end and have gdbserver Andrew> forward them to gdb. Would it work to redirect I/O when launching the inferior? Andrew> The final thing that might be relevant to this topic, though clearly not Andrew> what you're actually asking about, is the 'O' packet, which allows Andrew> gdbserver to write messages to gdb's console. As I understand it, this Andrew> is often used to allow things like monitor commands to print diagnostic Andrew> output, but in general I think this is more for gdbserver itself (not Andrew> the thing running under gdbserver) to communicate with the gdb user. Note also the 'O' packet doesn't work with non-stop. GDB needs a bit of protocol work in this area. Tom