Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756831Ab0BKSWf (ORCPT ); Thu, 11 Feb 2010 13:22:35 -0500 Received: from ey-out-2122.google.com ([74.125.78.25]:29656 "EHLO ey-out-2122.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756516Ab0BKSWe (ORCPT ); Thu, 11 Feb 2010 13:22:34 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=KQ9Lt3tEIRLbLTdSDyhlWEIpkUC42zVtyFHCqKwD2mfXnRlVQup6FaL76HrICHDsHC ECbG5JP+JJeWMizDkCVXCy5PP0+8H4IJqq010jq7vtntHvo1KMNHBnptSR+cgauLRhMW PL2eHI7t6mj1hbt11/6fhXvplKFgFb7foAkkI= Date: Thu, 11 Feb 2010 19:22:26 +0100 From: Frederic Weisbecker To: Michael Stefaniuc Cc: "K.Prasad" , Alan Stern , linux-kernel@vger.kernel.org, Maneesh Soni , Alexandre Julliard , "Rafael J. Wysocki" , Maciej Rutecki Subject: Re: Regression in ptrace (Wine) starting with 2.6.33-rc1 Message-ID: <20100211182224.GC4915@nowhere> References: <4B743149.4000707@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B743149.4000707@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2815 Lines: 69 On Thu, Feb 11, 2010 at 05:33:13PM +0100, Michael Stefaniuc wrote: > Hello! > > 2.6.33-rc1 broke ptrace for Wine, specifically the setting of the debug > registers. This is visible in the Wine ntdll exception tests failing on > 2.6.33-rcX while they work just fine in 2.6.32. > > A regression test resulted in: > 72f674d203cd230426437cdcf7dd6f681dad8b0d is the first bad commit > commit 72f674d203cd230426437cdcf7dd6f681dad8b0d > Author: K.Prasad > Date: Mon Jun 1 23:45:48 2009 +0530 > > hw-breakpoints: modify Ptrace routines to access breakpoint registers > > This patch modifies the ptrace code to use the new wrapper routines > around > the > debug/breakpoint registers. > > [ Impact: adapt x86 ptrace to the new breakpoint Api ] > > Original-patch-by: Alan Stern > Signed-off-by: K.Prasad > Signed-off-by: Maneesh Soni > Reviewed-by: Alan Stern > Signed-off-by: Frederic Weisbecker > > :040000 040000 f72ff4760c3fa1dffcd72494e77bee2c76039505 > b60d5fe2088ff635568e800d5759a0b373b5e439 M arch > > > The first ntdll exception test in test_exceptions() > http://source.winehq.org/git/wine.git/?a=blob;f=dlls/ntdll/tests/exception.c;h=9149b6961764dec31a0af5cd3b93ab3072703dbb;hb=312e4f6b235a468f8bf764101a5b97cf34dd4143#l594 > run_exception_test(dreg_handler, NULL, &segfault_code, > sizeof(segfault_code), > 0); > produces (make exception.ok) the output: > err:seh:setup_exception_record stack overflow 932 bytes in thread 0009 eip > 7bc3c97f esp 00240f8c stack 0x240000-0x241000-0x340000 > The stack overflow is detected by the ntdll internal function > setup_exception_record() > http://source.winehq.org/git/wine.git/?a=blob;f=dlls/ntdll/signal_i386.c;h=4eccb61954c43d75144575411313d59405decfc3;hb=312e4f6b235a468f8bf764101a5b97cf34dd4143#l1495 > which aborts the thread. > The problem happens on both i386 (Intel Atom CPU) as well as on x86_64 > (Intel Q9450); the stack overflow bytes differ though but are always the > same for each box. > > All the ntdll exception tests run just fine with 2.6.32 and older > kernels. For a summary of the ntdll exception tests please see > http://test.winehq.org/data/tests/ntdll:exception.html in the Wine > column. > > I have opened also http://bugzilla.kernel.org/show_bug.cgi?id=15273 for > this. > > thanks > bye > michael Thanks a lot for your report. Is there an easy way to reproduce this? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/