From patchwork Sun May 1 21:21:38 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Hope X-Patchwork-Id: 1324 Return-Path: Delivered-To: unknown Received: from imap.gmail.com (74.125.159.109) by localhost6.localdomain6 with IMAP4-SSL; 08 Jun 2011 14:50:55 -0000 Delivered-To: patches@linaro.org Received: by 10.224.2.73 with SMTP id 9cs237667qai; Sun, 1 May 2011 14:22:02 -0700 (PDT) Received: by 10.223.25.152 with SMTP id z24mr1268974fab.123.1304284921898; Sun, 01 May 2011 14:22:01 -0700 (PDT) Received: from mail-bw0-f50.google.com (mail-bw0-f50.google.com [209.85.214.50]) by mx.google.com with ESMTPS id h1si9371765fai.126.2011.05.01.14.22.00 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 01 May 2011 14:22:00 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.214.50 is neither permitted nor denied by best guess record for domain of michael.hope@linaro.org) client-ip=209.85.214.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.214.50 is neither permitted nor denied by best guess record for domain of michael.hope@linaro.org) smtp.mail=michael.hope@linaro.org Received: by bwz2 with SMTP id 2so5791699bwz.37 for ; Sun, 01 May 2011 14:22:00 -0700 (PDT) Received: by 10.204.20.132 with SMTP id f4mr2758291bkb.169.1304284918165; Sun, 01 May 2011 14:21:58 -0700 (PDT) MIME-Version: 1.0 Received: by 10.204.22.2 with HTTP; Sun, 1 May 2011 14:21:38 -0700 (PDT) From: Michael Hope Date: Mon, 2 May 2011 09:21:38 +1200 Message-ID: Subject: [PATCH, ARM] fix PR pch/45979 regression on ARM To: gcc-patches@gcc.gnu.org Cc: patches@linaro.org Linux 2.6.35 and later on ARM randomise the address space, breaking precompiled header support in GCC. The fix is to use the support in GCC for mmap()ing into a fixed, likely to be free address. The ARM memory map is modeled on the i386 so I used the same definition. Tested on trunk with a Ubuntu 2.6.35 kernel. Bootstraps OK and clears all of the PCH testsuite failures. Note that this change is equivalent to Mikael Pettersson's patch at: http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02252.html OK for trunk? -- Michael gcc/ 2011-05-02 Michael Hope PR pch/45979 * config/host-linux.c (TRY_EMPTY_VM_SPACE): Define for __ARM_EABI__ hosts. diff --git a/gcc/config/host-linux.c b/gcc/config/host-linux.c index 47ce3ea..8b41685 100644 --- a/gcc/config/host-linux.c +++ b/gcc/config/host-linux.c @@ -84,6 +84,8 @@ # define TRY_EMPTY_VM_SPACE 0x60000000 #elif defined(__mc68000__) # define TRY_EMPTY_VM_SPACE 0x40000000 +#elif defined(__ARM_EABI__) +# define TRY_EMPTY_VM_SPACE 0x60000000 #else # define TRY_EMPTY_VM_SPACE 0 #endif