From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16448 invoked by alias); 16 Apr 2013 02:09:56 -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 16436 invoked by uid 89); 16 Apr 2013 02:09:56 -0000 X-Spam-SWARE-Status: No, score=-2.9 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KHOP_RCVD_TRUST,KHOP_THREADED,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_YE,TW_QE autolearn=ham version=3.3.1 Received: from mail-la0-f50.google.com (HELO mail-la0-f50.google.com) (209.85.215.50) by sourceware.org (qpsmtpd/0.84/v0.84-167-ge50287c) with ESMTP; Tue, 16 Apr 2013 02:09:55 +0000 Received: by mail-la0-f50.google.com with SMTP id el20so8112lab.37 for ; Mon, 15 Apr 2013 19:09:52 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.152.110.167 with SMTP id ib7mr144980lab.22.1366078192650; Mon, 15 Apr 2013 19:09:52 -0700 (PDT) Received: by 10.112.149.130 with HTTP; Mon, 15 Apr 2013 19:09:52 -0700 (PDT) In-Reply-To: <516C10D3.3020304@redhat.com> References: <516C10D3.3020304@redhat.com> Date: Tue, 16 Apr 2013 02:09:00 -0000 Message-ID: Subject: Re: Fwd: disabling NMI rendering breakpoints non-functional? From: Kent Tong To: gdb@sourceware.org Content-Type: text/plain; charset=ISO-8859-1 X-SW-Source: 2013-04/txt/msg00041.txt.bz2 > GDB has no clue of NMI, it just tells the target to set a breakpoint at > some address, or to single-step. How qemu implements those things > behind the scenes is up to qemu. Thanks for the reply! I also figured that. But does the breakpoint if it is set to a memory address whose content will be overwritten (e.g., loading instructions into there)? In the past it worked, but now somehow it has stopped working. -- Kent Tong IT author and consultant, child education coach