From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#20614: Segmentation fault when building on Power8 Little Endian Date: Mon, 05 Oct 2015 12:39:12 +0300 Message-ID: <83oagdzmbj.fsf@gnu.org> References: <555C3E3C.4090700@redhat.com> <1gpp5vi5xn.fsf@fencepost.gnu.org> <555DD5D3.3020207@redhat.com> <55A3A08A.9060905@redhat.com> <55A4BFB7.3010208@redhat.com> <55F95275.4040209@redhat.com> <56012AA6.7010702@redhat.com> <56025D9A.9080608@redhat.com> <838u7xlbsn.fsf@gnu.org> <56028633.3000303@redhat.com> <83zj0djskx.fsf@gnu.org> <56029707.9040100@redhat.com> <83wpvhjpdd.fsf@gnu.org> <5603D8BE.10300@redhat.com> <834mijkf36.fsf@gnu.org> <56043950.7040108@redhat.com> <83k2rdhaso.fsf@gnu.org> <560BBBF3.6000407@redhat.com> <83r3lf9gq4.fsf@gnu.org> <560D1EAA.3080608@redhat.com> <83bnciaidw.fsf@gnu.org> <560D3DC5.2050804@redhat.com> <837fn6a881.fsf@gnu.org> <560E420B.9070200@redhat.com> <83d1wx7j0e.fsf@gnu.org> <560E7F90.1070609@redhat.com> <83wpv55qog.fsf@gnu.org> <5612295F.4000607@redhat.com> <83twq5zpne.fsf@gnu.org> <56123FF0.3040104@redhat.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1444038063 9203 80.91.229.3 (5 Oct 2015 09:41:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 5 Oct 2015 09:41:03 +0000 (UTC) Cc: 20614@debbugs.gnu.org To: Petr Hracek Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Oct 05 11:40:52 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zj2GJ-0004vA-FE for geb-bug-gnu-emacs@m.gmane.org; Mon, 05 Oct 2015 11:40:51 +0200 Original-Received: from localhost ([::1]:45052 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zj2GI-0000wQ-Ln for geb-bug-gnu-emacs@m.gmane.org; Mon, 05 Oct 2015 05:40:50 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53357) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zj2Fc-0000oU-GZ for bug-gnu-emacs@gnu.org; Mon, 05 Oct 2015 05:40:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zj2FX-000500-KU for bug-gnu-emacs@gnu.org; Mon, 05 Oct 2015 05:40:08 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:37648) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zj2FX-0004zg-Hc for bug-gnu-emacs@gnu.org; Mon, 05 Oct 2015 05:40:03 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Zj2FW-0000N3-UU for bug-gnu-emacs@gnu.org; Mon, 05 Oct 2015 05:40:03 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 05 Oct 2015 09:40:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20614 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 20614-submit@debbugs.gnu.org id=B20614.14440379571366 (code B ref 20614); Mon, 05 Oct 2015 09:40:02 +0000 Original-Received: (at 20614) by debbugs.gnu.org; 5 Oct 2015 09:39:17 +0000 Original-Received: from localhost ([127.0.0.1]:54852 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zj2Em-0000Ly-LA for submit@debbugs.gnu.org; Mon, 05 Oct 2015 05:39:17 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:53278) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zj2Ek-0000Lq-J2 for 20614@debbugs.gnu.org; Mon, 05 Oct 2015 05:39:15 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0NVQ00000QSYLO00@a-mtaout22.012.net.il> for 20614@debbugs.gnu.org; Mon, 05 Oct 2015 12:39:13 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NVQ0002LQTD0F80@a-mtaout22.012.net.il>; Mon, 05 Oct 2015 12:39:13 +0300 (IDT) In-reply-to: <56123FF0.3040104@redhat.com> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:107306 Archived-At: > Cc: 20614@debbugs.gnu.org > From: Petr Hracek > Date: Mon, 5 Oct 2015 11:16:32 +0200 > > (gdb) p old_section_names + NEW_SECTION_H (nn).sh_name > $2 = 0x4000128ceb51
We have a function valid_pointer_p in alloc.c. What happens if you use the same code in unexec, before the series of calls to strcmp that crash, and only proceed to call strcmp if valid_pointer_p returns a positive value?