mirror of
https://github.com/mozilla/gecko-dev.git
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126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is XPCOM utility functions for Mac OS X
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*
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* The Initial Developer of the Original Code is Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mark Mentovai <mark@moxienet.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsMacUtilsImpl.h"
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#include <CoreFoundation/CoreFoundation.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <mach-o/fat.h>
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NS_IMPL_ISUPPORTS1(nsMacUtilsImpl, nsIMacUtils)
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/* readonly attribute boolean isUniversalBinary; */
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// True when the main executable is a fat file supporting at least
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// ppc and x86 (universal binary).
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NS_IMETHODIMP nsMacUtilsImpl::GetIsUniversalBinary(PRBool *aIsUniversalBinary)
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{
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static PRBool sInitialized = PR_FALSE,
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sIsUniversalBinary = PR_FALSE;
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if (sInitialized) {
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*aIsUniversalBinary = sIsUniversalBinary;
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return NS_OK;
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}
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PRBool foundPPC = PR_FALSE,
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foundX86 = PR_FALSE;
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CFURLRef executableURL = nsnull;
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int fd = -1;
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CFBundleRef mainBundle;
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if (!(mainBundle = ::CFBundleGetMainBundle()))
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goto done;
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if (!(executableURL = ::CFBundleCopyExecutableURL(mainBundle)))
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goto done;
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char executablePath[PATH_MAX];
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if (!::CFURLGetFileSystemRepresentation(executableURL, PR_TRUE,
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(UInt8*) executablePath,
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sizeof(executablePath)))
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goto done;
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if ((fd = open(executablePath, O_RDONLY)) == -1)
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goto done;
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struct fat_header fatHeader;
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if (read(fd, &fatHeader, sizeof(fatHeader)) != sizeof(fatHeader))
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goto done;
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// The fat header is always stored on disk as big-endian.
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fatHeader.magic = CFSwapInt32BigToHost(fatHeader.magic);
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fatHeader.nfat_arch = CFSwapInt32BigToHost(fatHeader.nfat_arch);
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// Main executable is thin.
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if (fatHeader.magic != FAT_MAGIC)
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goto done;
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// Loop over each architecture in the file. We're presently only
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// interested in 32-bit PPC and x86.
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for (PRUint32 i = 0 ; i < fatHeader.nfat_arch ; i++) {
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struct fat_arch fatArch;
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if (read(fd, &fatArch, sizeof(fatArch)) != sizeof(fatArch))
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goto done;
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// This is still part of the fat header, so byte-swap as needed.
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fatArch.cputype = CFSwapInt32BigToHost(fatArch.cputype);
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// Don't mask out the ABI bits. This allows identification of ppc64
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// as distinct from ppc. CPU_TYPE_X86 is preferred to CPU_TYPE_I386
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// but does not exist prior to the 10.4 headers.
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if (fatArch.cputype == CPU_TYPE_POWERPC)
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foundPPC = PR_TRUE;
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else if (fatArch.cputype == CPU_TYPE_I386)
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foundX86 = PR_TRUE;
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}
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if (foundPPC && foundX86)
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sIsUniversalBinary = PR_TRUE;
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done:
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if (fd != -1)
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close(fd);
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if (executableURL)
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::CFRelease(executableURL);
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*aIsUniversalBinary = sIsUniversalBinary;
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sInitialized = PR_TRUE;
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return NS_OK;
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}
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