зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
4.7 KiB
C++
137 строки
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 6; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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 Mozilla XPCOM.
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*
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* The Initial Developer of the Original Code is
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* Benjamin Smedberg <benjamin@smedbergs.us>
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*
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 "nsGlueLinking.h"
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#include "nsXPCOMGlue.h"
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#include <mach-o/dyld.h>
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#include <sys/param.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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static const mach_header* sXULLibImage;
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static void
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ReadDependentCB(const char *aDependentLib)
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{
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(void) NSAddImage(aDependentLib,
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NSADDIMAGE_OPTION_RETURN_ON_ERROR |
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NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
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}
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static void*
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LookupSymbol(const mach_header* aLib, const char* aSymbolName)
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{
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// Try to use |NSLookupSymbolInImage| since it is faster than searching
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// the global symbol table. If we couldn't get a mach_header pointer
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// for the XPCOM dylib, then use |NSLookupAndBindSymbol| to search the
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// global symbol table (this shouldn't normally happen, unless the user
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// has called XPCOMGlueStartup(".") and relies on libxpcom.dylib
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// already being loaded).
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NSSymbol sym = nsnull;
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if (aLib) {
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sym = NSLookupSymbolInImage(aLib, aSymbolName,
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NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
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NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
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} else {
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if (NSIsSymbolNameDefined(aSymbolName))
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sym = NSLookupAndBindSymbol(aSymbolName);
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}
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if (!sym)
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return nsnull;
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return NSAddressOfSymbol(sym);
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}
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GetFrozenFunctionsFunc
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XPCOMGlueLoad(const char *xpcomFile)
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{
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const mach_header* lib = nsnull;
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if (xpcomFile[0] != '.' || xpcomFile[1] != '\0') {
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char xpcomDir[PATH_MAX];
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if (realpath(xpcomFile, xpcomDir)) {
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char *lastSlash = strrchr(xpcomDir, '/');
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if (lastSlash) {
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*lastSlash = '\0';
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XPCOMGlueLoadDependentLibs(xpcomDir, ReadDependentCB);
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snprintf(lastSlash, PATH_MAX - strlen(xpcomDir), "/" XUL_DLL);
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sXULLibImage = NSAddImage(xpcomDir,
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NSADDIMAGE_OPTION_RETURN_ON_ERROR |
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NSADDIMAGE_OPTION_WITH_SEARCHING |
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NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
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}
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}
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lib = NSAddImage(xpcomFile,
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NSADDIMAGE_OPTION_RETURN_ON_ERROR |
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NSADDIMAGE_OPTION_WITH_SEARCHING |
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NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
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}
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return (GetFrozenFunctionsFunc) LookupSymbol(lib, "_NS_GetFrozenFunctions");
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}
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void
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XPCOMGlueUnload()
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{
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// nothing to do, since we cannot unload dylibs on OS X
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}
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nsresult
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XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad *symbols)
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{
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nsresult rv = NS_OK;
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while (symbols->functionName) {
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char buffer[512];
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snprintf(buffer, sizeof(buffer), "_%s", symbols->functionName);
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*symbols->function = (NSFuncPtr) LookupSymbol(sXULLibImage, buffer);
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if (!*symbols->function)
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rv = NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
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++symbols;
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}
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return rv;
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}
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