From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 70438 invoked by alias); 18 Nov 2017 04:20:32 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 70427 invoked by uid 89); 18 Nov 2017 04:20:31 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KB_WAM_FROM_NAME_SINGLEWORD,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=H*r:sk:gdb@sou X-HELO: mail-wm0-f51.google.com Received: from mail-wm0-f51.google.com (HELO mail-wm0-f51.google.com) (74.125.82.51) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sat, 18 Nov 2017 04:20:30 +0000 Received: by mail-wm0-f51.google.com with SMTP id v186so9738220wma.2 for ; Fri, 17 Nov 2017 20:20:30 -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:in-reply-to:references:from:date :message-id:subject:to:cc; bh=p9k/0HPvpV+vCbFHiKZJe/5/nnrT/DnFTOTGE8CaI+A=; b=N1tu4HOExgP3kjXwW6kUXpZVmkM+I5eL8imQcZdYnwujJM7OcCBN5Qibs2XUOZtmSH 9R8lbNxeeO3rMNWLWG14ZCrL/GbhTvY04B4giXN6FctxygCg/xvWicYkXV3GuEF27gTl cbHHBUByRGDoRlTePZn0rv/uComYvn0RU6dsbiBAf0GSzK/kXEgEusWfRg6sCJHfBux+ ZzkBPIeL6C2A2qzH/zaeywV+Pig0TMqM/8LnAUZHx7G8IfcRP8O+WGFyOHs101BRZV3J vuaZEnsTo6e7mfCeLz1jvLeG5TVekI5de6JSUf+2BPF2KQR4n0HBAkv4/vCmkh3QDrgy wQNA== X-Gm-Message-State: AJaThX7KH0iuznEooNYzrApln+tJ/qHhwPskPrf/icHMLlIPRsb2xJYX aRkwrpwKwQEkvv9qNMNzM93O2VPHSWCCPOOPZg== X-Google-Smtp-Source: AGs4zMbcwhm7fGnh3e+NYfxRyYCzOsz13XWaqhE3CBIvvIplg0jwXOWZDFagngDvtOiovRqLd3NrnB0nBmU4J7FQ5oY= X-Received: by 10.80.150.69 with SMTP id y63mr10368178eda.75.1510978828639; Fri, 17 Nov 2017 20:20:28 -0800 (PST) MIME-Version: 1.0 Received: by 10.80.135.140 with HTTP; Fri, 17 Nov 2017 20:20:28 -0800 (PST) In-Reply-To: <20171118040311.tri7yn4alqxzc3gt@adacore.com> References: <20171117161059.3oxfgipkgknfymrm@adacore.com> <20171118040311.tri7yn4alqxzc3gt@adacore.com> From: Yubin Ruan Date: Sat, 18 Nov 2017 04:20:00 -0000 Message-ID: Subject: Re: how GDB use ptrace to return from a function To: Joel Brobecker Cc: gdb@sourceware.org Content-Type: text/plain; charset="UTF-8" X-IsSubscribed: yes X-SW-Source: 2017-11/txt/msg00014.txt.bz2 2017-11-18 12:03 GMT+08:00 Joel Brobecker : >> what break point events are common for X86? > > IIRC, the breakpoint instruction on x86 is the int3 instruction. > It should generate a SIGTRAP upon execution, just like any user- > inserted breakpoints. Thanks Joel ;-) Yubin