gecko-dev/xpcom/glue/standalone/nsGlueLinkingOSX.cpp

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4.7 KiB
C++

/* -*- Mode: C++; tab-width: 6; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XPCOM.
*
* The Initial Developer of the Original Code is
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsGlueLinking.h"
#include "nsXPCOMGlue.h"
#include <mach-o/dyld.h>
#include <sys/param.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
static const mach_header* sXULLibImage;
static void
ReadDependentCB(const char *aDependentLib)
{
(void) NSAddImage(aDependentLib,
NSADDIMAGE_OPTION_RETURN_ON_ERROR |
NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
}
static void*
LookupSymbol(const mach_header* aLib, const char* aSymbolName)
{
// Try to use |NSLookupSymbolInImage| since it is faster than searching
// the global symbol table. If we couldn't get a mach_header pointer
// for the XPCOM dylib, then use |NSLookupAndBindSymbol| to search the
// global symbol table (this shouldn't normally happen, unless the user
// has called XPCOMGlueStartup(".") and relies on libxpcom.dylib
// already being loaded).
NSSymbol sym = nsnull;
if (aLib) {
sym = NSLookupSymbolInImage(aLib, aSymbolName,
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND |
NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
} else {
if (NSIsSymbolNameDefined(aSymbolName))
sym = NSLookupAndBindSymbol(aSymbolName);
}
if (!sym)
return nsnull;
return NSAddressOfSymbol(sym);
}
GetFrozenFunctionsFunc
XPCOMGlueLoad(const char *xpcomFile)
{
const mach_header* lib = nsnull;
if (xpcomFile[0] != '.' || xpcomFile[1] != '\0') {
char xpcomDir[PATH_MAX];
if (realpath(xpcomFile, xpcomDir)) {
char *lastSlash = strrchr(xpcomDir, '/');
if (lastSlash) {
*lastSlash = '\0';
XPCOMGlueLoadDependentLibs(xpcomDir, ReadDependentCB);
snprintf(lastSlash, PATH_MAX - strlen(xpcomDir), "/" XUL_DLL);
sXULLibImage = NSAddImage(xpcomDir,
NSADDIMAGE_OPTION_RETURN_ON_ERROR |
NSADDIMAGE_OPTION_WITH_SEARCHING |
NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
}
}
lib = NSAddImage(xpcomFile,
NSADDIMAGE_OPTION_RETURN_ON_ERROR |
NSADDIMAGE_OPTION_WITH_SEARCHING |
NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME);
}
return (GetFrozenFunctionsFunc) LookupSymbol(lib, "_NS_GetFrozenFunctions");
}
void
XPCOMGlueUnload()
{
// nothing to do, since we cannot unload dylibs on OS X
}
nsresult
XPCOMGlueLoadXULFunctions(const nsDynamicFunctionLoad *symbols)
{
nsresult rv = NS_OK;
while (symbols->functionName) {
char buffer[512];
snprintf(buffer, sizeof(buffer), "_%s", symbols->functionName);
*symbols->function = (NSFuncPtr) LookupSymbol(sXULLibImage, buffer);
if (!*symbols->function)
rv = NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
++symbols;
}
return rv;
}