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nest-open-source / nest-learning-thermostat / 5.1.3 / nspr / 8100881f1dc998c6b66bf781e39f994a53cf40f9 / . / nspr-4.8.6 / mozilla / nsprpub / pr / src / linking / prlink.c
blob: 7cc55c4e8471d2b8122e118e609b937ebda76db6 [file] [log] [blame]
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Streeter (Hewlett-Packard Company)
*
* 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 "primpl.h"
#include <string.h>
#ifdef XP_BEOS
#include <image.h>
#endif
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
#include <Carbon/Carbon.h>
#include <CoreFoundation/CoreFoundation.h>
#endif
#ifdef XP_UNIX
#ifdef USE_DLFCN
#include <dlfcn.h>
/* Define these on systems that don't have them. */
#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY RTLD_NOW
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
#ifndef RTLD_LOCAL
#define RTLD_LOCAL 0
#endif
#ifdef AIX
#include <sys/ldr.h>
#ifndef L_IGNOREUNLOAD /* AIX 4.3.3 does not have L_IGNOREUNLOAD. */
#define L_IGNOREUNLOAD 0x10000000
#endif
#endif
#ifdef OSF1
#include <loader.h>
#include <rld_interface.h>
#endif
#elif defined(USE_HPSHL)
#include <dl.h>
#elif defined(USE_MACH_DYLD)
#include <mach-o/dyld.h>
#endif
#endif /* XP_UNIX */
#define _PR_DEFAULT_LD_FLAGS PR_LD_LAZY
/*
* On these platforms, symbols have a leading '_'.
*/
#if defined(SUNOS4) || (defined(DARWIN) && defined(USE_MACH_DYLD)) \
|| defined(NEXTSTEP) || defined(XP_OS2) \
|| ((defined(OPENBSD) || defined(NETBSD)) && !defined(__ELF__))
#define NEED_LEADING_UNDERSCORE
#endif
#define PR_LD_PATHW 0x8000 /* for PR_LibSpec_PathnameU */
/************************************************************************/
struct PRLibrary {
char* name; /* Our own copy of the name string */
PRLibrary* next;
int refCount;
const PRStaticLinkTable* staticTable;
#ifdef XP_PC
#ifdef XP_OS2
HMODULE dlh;
#else
HINSTANCE dlh;
#endif
#endif
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
CFragConnectionID connection;
CFBundleRef bundle;
Ptr main;
CFMutableDictionaryRef wrappers;
const struct mach_header* image;
#endif
#ifdef XP_UNIX
#if defined(USE_HPSHL)
shl_t dlh;
#elif defined(USE_MACH_DYLD)
NSModule dlh;
#else
void* dlh;
#endif
#endif
#ifdef XP_BEOS
void* dlh;
void* stub_dlh;
#endif
};
static PRLibrary *pr_loadmap;
static PRLibrary *pr_exe_loadmap;
static PRMonitor *pr_linker_lock;
static char* _pr_currentLibPath = NULL;
static PRLibrary *pr_LoadLibraryByPathname(const char *name, PRIntn flags);
/************************************************************************/
#if !defined(USE_DLFCN) && !defined(HAVE_STRERROR)
#define ERR_STR_BUF_LENGTH 20
#endif
static void DLLErrorInternal(PRIntn oserr)
/*
** This whole function, and most of the code in this file, are run
** with a big hairy lock wrapped around it. Not the best of situations,
** but will eventually come up with the right answer.
*/
{
const char *error = NULL;
#ifdef USE_DLFCN
error = dlerror(); /* $$$ That'll be wrong some of the time - AOF */
#elif defined(HAVE_STRERROR)
error = strerror(oserr); /* this should be okay */
#else
char errStrBuf[ERR_STR_BUF_LENGTH];
PR_snprintf(errStrBuf, sizeof(errStrBuf), "error %d", oserr);
error = errStrBuf;
#endif
if (NULL != error)
PR_SetErrorText(strlen(error), error);
} /* DLLErrorInternal */
void _PR_InitLinker(void)
{
PRLibrary *lm = NULL;
#if defined(XP_UNIX)
void *h;
#endif
if (!pr_linker_lock) {
pr_linker_lock = PR_NewNamedMonitor("linker-lock");
}
PR_EnterMonitor(pr_linker_lock);
#if defined(XP_PC)
lm = PR_NEWZAP(PRLibrary);
lm->name = strdup("Executable");
#if defined(XP_OS2)
lm->dlh = NULLHANDLE;
#else
/* A module handle for the executable. */
lm->dlh = GetModuleHandle(NULL);
#endif /* ! XP_OS2 */
lm->refCount = 1;
lm->staticTable = NULL;
pr_exe_loadmap = lm;
pr_loadmap = lm;
#elif defined(XP_UNIX)
#ifdef HAVE_DLL
#if defined(USE_DLFCN) && !defined(NO_DLOPEN_NULL)
h = dlopen(0, RTLD_LAZY);
if (!h) {
char *error;
DLLErrorInternal(_MD_ERRNO());
error = (char*)PR_MALLOC(PR_GetErrorTextLength());
(void) PR_GetErrorText(error);
fprintf(stderr, "failed to initialize shared libraries [%s]\n",
error);
PR_DELETE(error);
abort();/* XXX */
}
#elif defined(USE_HPSHL)
h = NULL;
/* don't abort with this NULL */
#elif defined(USE_MACH_DYLD) || defined(NO_DLOPEN_NULL)
h = NULL; /* XXXX toshok */ /* XXXX vlad */
#else
#error no dll strategy
#endif /* USE_DLFCN */
lm = PR_NEWZAP(PRLibrary);
if (lm) {
lm->name = strdup("a.out");
lm->refCount = 1;
lm->dlh = h;
lm->staticTable = NULL;
}
pr_exe_loadmap = lm;
pr_loadmap = lm;
#endif /* HAVE_DLL */
#endif /* XP_UNIX */
if (lm) {
PR_LOG(_pr_linker_lm, PR_LOG_MIN,
("Loaded library %s (init)", lm->name));
}
PR_ExitMonitor(pr_linker_lock);
}
/*
* _PR_ShutdownLinker does not unload the dlls loaded by the application
* via calls to PR_LoadLibrary. Any dlls that still remain on the
* pr_loadmap list when NSPR shuts down are application programming errors.
* The only exception is pr_exe_loadmap, which was added to the list by
* NSPR and hence should be cleaned up by NSPR.
*/
void _PR_ShutdownLinker(void)
{
/* FIXME: pr_exe_loadmap should be destroyed. */
PR_DestroyMonitor(pr_linker_lock);
pr_linker_lock = NULL;
if (_pr_currentLibPath) {
free(_pr_currentLibPath);
_pr_currentLibPath = NULL;
}
}
/******************************************************************************/
PR_IMPLEMENT(PRStatus) PR_SetLibraryPath(const char *path)
{
PRStatus rv = PR_SUCCESS;
if (!_pr_initialized) _PR_ImplicitInitialization();
PR_EnterMonitor(pr_linker_lock);
if (_pr_currentLibPath) {
free(_pr_currentLibPath);
}
if (path) {
_pr_currentLibPath = strdup(path);
if (!_pr_currentLibPath) {
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
rv = PR_FAILURE;
}
} else {
_pr_currentLibPath = 0;
}
PR_ExitMonitor(pr_linker_lock);
return rv;
}
/*
** Return the library path for finding shared libraries.
*/
PR_IMPLEMENT(char *)
PR_GetLibraryPath(void)
{
char *ev;
char *copy = NULL; /* a copy of _pr_currentLibPath */
if (!_pr_initialized) _PR_ImplicitInitialization();
PR_EnterMonitor(pr_linker_lock);
if (_pr_currentLibPath != NULL) {
goto exit;
}
/* initialize pr_currentLibPath */
#ifdef XP_PC
ev = getenv("LD_LIBRARY_PATH");
if (!ev) {
ev = ".;\\lib";
}
ev = strdup(ev);
#endif
#if defined(XP_UNIX) || defined(XP_BEOS)
#if defined(USE_DLFCN) || defined(USE_MACH_DYLD) || defined(XP_BEOS)
{
char *p=NULL;
int len;
#ifdef XP_BEOS
ev = getenv("LIBRARY_PATH");
if (!ev) {
ev = "%A/lib:/boot/home/config/lib:/boot/beos/system/lib";
}
#else
ev = getenv("LD_LIBRARY_PATH");
if (!ev) {
ev = "/usr/lib:/lib";
}
#endif
len = strlen(ev) + 1; /* +1 for the null */
p = (char*) malloc(len);
if (p) {
strcpy(p, ev);
} /* if (p) */
ev = p;
PR_LOG(_pr_io_lm, PR_LOG_NOTICE, ("linker path '%s'", ev));
}
#else
/* AFAIK there isn't a library path with the HP SHL interface --Rob */
ev = strdup("");
#endif
#endif
/*
* If ev is NULL, we have run out of memory
*/
_pr_currentLibPath = ev;
exit:
if (_pr_currentLibPath) {
copy = strdup(_pr_currentLibPath);
}
PR_ExitMonitor(pr_linker_lock);
if (!copy) {
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
}
return copy;
}
/*
** Build library name from path, lib and extensions
*/
PR_IMPLEMENT(char*)
PR_GetLibraryName(const char *path, const char *lib)
{
char *fullname;
#ifdef XP_PC
if (strstr(lib, PR_DLL_SUFFIX) == NULL)
{
if (path) {
fullname = PR_smprintf("%s\\%s%s", path, lib, PR_DLL_SUFFIX);
} else {
fullname = PR_smprintf("%s%s", lib, PR_DLL_SUFFIX);
}
} else {
if (path) {
fullname = PR_smprintf("%s\\%s", path, lib);
} else {
fullname = PR_smprintf("%s", lib);
}
}
#endif /* XP_PC */
#if defined(XP_UNIX) || defined(XP_BEOS)
if (strstr(lib, PR_DLL_SUFFIX) == NULL)
{
if (path) {
fullname = PR_smprintf("%s/lib%s%s", path, lib, PR_DLL_SUFFIX);
} else {
fullname = PR_smprintf("lib%s%s", lib, PR_DLL_SUFFIX);
}
} else {
if (path) {
fullname = PR_smprintf("%s/%s", path, lib);
} else {
fullname = PR_smprintf("%s", lib);
}
}
#endif /* XP_UNIX || XP_BEOS */
return fullname;
}
/*
** Free the memory allocated, for the caller, by PR_GetLibraryName
*/
PR_IMPLEMENT(void)
PR_FreeLibraryName(char *mem)
{
PR_smprintf_free(mem);
}
static PRLibrary*
pr_UnlockedFindLibrary(const char *name)
{
PRLibrary* lm = pr_loadmap;
const char* np = strrchr(name, PR_DIRECTORY_SEPARATOR);
np = np ? np + 1 : name;
while (lm) {
const char* cp = strrchr(lm->name, PR_DIRECTORY_SEPARATOR);
cp = cp ? cp + 1 : lm->name;
#ifdef WIN32
/* Windows DLL names are case insensitive... */
if (strcmpi(np, cp) == 0)
#elif defined(XP_OS2)
if (stricmp(np, cp) == 0)
#else
if (strcmp(np, cp) == 0)
#endif
{
/* found */
lm->refCount++;
PR_LOG(_pr_linker_lm, PR_LOG_MIN,
("%s incr => %d (find lib)",
lm->name, lm->refCount));
return lm;
}
lm = lm->next;
}
return NULL;
}
PR_IMPLEMENT(PRLibrary*)
PR_LoadLibraryWithFlags(PRLibSpec libSpec, PRIntn flags)
{
if (flags == 0) {
flags = _PR_DEFAULT_LD_FLAGS;
}
switch (libSpec.type) {
case PR_LibSpec_Pathname:
return pr_LoadLibraryByPathname(libSpec.value.pathname, flags);
#ifdef WIN32
case PR_LibSpec_PathnameU:
/*
* cast to |char *| and set PR_LD_PATHW flag so that
* it can be cast back to PRUnichar* in the callee.
*/
return pr_LoadLibraryByPathname((const char*)
libSpec.value.pathname_u,
flags | PR_LD_PATHW);
#endif
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return NULL;
}
}
PR_IMPLEMENT(PRLibrary*)
PR_LoadLibrary(const char *name)
{
PRLibSpec libSpec;
libSpec.type = PR_LibSpec_Pathname;
libSpec.value.pathname = name;
return PR_LoadLibraryWithFlags(libSpec, 0);
}
#if defined(USE_MACH_DYLD)
static NSModule
pr_LoadMachDyldModule(const char *name)
{
NSObjectFileImage ofi;
NSModule h = NULL;
if (NSCreateObjectFileImageFromFile(name, &ofi)
== NSObjectFileImageSuccess) {
h = NSLinkModule(ofi, name, NSLINKMODULE_OPTION_PRIVATE
| NSLINKMODULE_OPTION_RETURN_ON_ERROR);
/*
* TODO: If NSLinkModule fails, use NSLinkEditError to retrieve
* error information.
*/
if (NSDestroyObjectFileImage(ofi) == FALSE) {
if (h) {
(void)NSUnLinkModule(h, NSUNLINKMODULE_OPTION_NONE);
h = NULL;
}
}
}
return h;
}
#endif
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
/*
** macLibraryLoadProc is a function definition for a Mac shared library
** loading method. The "name" param is the same full or partial pathname
** that was passed to pr_LoadLibraryByPathName. The function must fill
** in the fields of "lm" which apply to its library type. Returns
** PR_SUCCESS if successful.
*/
typedef PRStatus (*macLibraryLoadProc)(const char *name, PRLibrary *lm);
#ifdef __ppc__
/*
** CFM and its TVectors only exist on PowerPC. Other OS X architectures
** only use Mach-O as a native binary format.
*/
static void* TV2FP(CFMutableDictionaryRef dict, const char* name, void *tvp)
{
static uint32 glue[6] = { 0x3D800000, 0x618C0000, 0x800C0000, 0x804C0004, 0x7C0903A6, 0x4E800420 };
uint32* newGlue = NULL;
if (tvp != NULL) {
CFStringRef nameRef = CFStringCreateWithCString(NULL, name, kCFStringEncodingASCII);
if (nameRef) {
CFMutableDataRef glueData = (CFMutableDataRef) CFDictionaryGetValue(dict, nameRef);
if (glueData == NULL) {
glueData = CFDataCreateMutable(NULL, sizeof(glue));
if (glueData != NULL) {
newGlue = (uint32*) CFDataGetMutableBytePtr(glueData);
memcpy(newGlue, glue, sizeof(glue));
newGlue[0] |= ((UInt32)tvp >> 16);
newGlue[1] |= ((UInt32)tvp & 0xFFFF);
MakeDataExecutable(newGlue, sizeof(glue));
CFDictionaryAddValue(dict, nameRef, glueData);
CFRelease(glueData);
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("TV2FP: created wrapper for CFM function %s().", name));
}
} else {
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("TV2FP: found wrapper for CFM function %s().", name));
newGlue = (uint32*) CFDataGetMutableBytePtr(glueData);
}
CFRelease(nameRef);
}
}
return newGlue;
}
static PRStatus
pr_LoadViaCFM(const char *name, PRLibrary *lm)
{
OSErr err;
Str255 errName;
FSRef ref;
FSSpec fileSpec;
Boolean tempUnusedBool;
/*
* Make an FSSpec from the path name and call GetDiskFragment.
*/
/* Use direct conversion of POSIX path to FSRef to FSSpec. */
err = FSPathMakeRef((const UInt8*)name, &ref, NULL);
if (err != noErr)
return PR_FAILURE;
err = FSGetCatalogInfo(&ref, kFSCatInfoNone, NULL, NULL,
&fileSpec, NULL);
if (err != noErr)
return PR_FAILURE;
/* Resolve an alias if this was one */
err = ResolveAliasFile(&fileSpec, true, &tempUnusedBool,
&tempUnusedBool);
if (err != noErr)
return PR_FAILURE;
/* Finally, try to load the library */
err = GetDiskFragment(&fileSpec, 0, kCFragGoesToEOF, fileSpec.name,
kLoadCFrag, &lm->connection, &lm->main, errName);
if (err == noErr && lm->connection) {
/*
* if we're a mach-o binary, need to wrap all CFM function
* pointers. need a hash-table of already seen function
* pointers, etc.
*/
lm->wrappers = CFDictionaryCreateMutable(NULL, 16,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (lm->wrappers) {
lm->main = TV2FP(lm->wrappers, "main", lm->main);
} else
err = memFullErr;
}
return (err == noErr) ? PR_SUCCESS : PR_FAILURE;
}
#endif /* __ppc__ */
/*
** Creates a CFBundleRef if the pathname refers to a Mac OS X bundle
** directory. The caller is responsible for calling CFRelease() to
** deallocate.
*/
static PRStatus
pr_LoadCFBundle(const char *name, PRLibrary *lm)
{
CFURLRef bundleURL;
CFBundleRef bundle = NULL;
char pathBuf[PATH_MAX];
const char *resolvedPath;
CFStringRef pathRef;
/* Takes care of relative paths and symlinks */
resolvedPath = realpath(name, pathBuf);
if (!resolvedPath)
return PR_FAILURE;
pathRef = CFStringCreateWithCString(NULL, pathBuf, kCFStringEncodingUTF8);
if (pathRef) {
bundleURL = CFURLCreateWithFileSystemPath(NULL, pathRef,
kCFURLPOSIXPathStyle, true);
if (bundleURL) {
bundle = CFBundleCreate(NULL, bundleURL);
CFRelease(bundleURL);
}
CFRelease(pathRef);
}
lm->bundle = bundle;
return (bundle != NULL) ? PR_SUCCESS : PR_FAILURE;
}
static PRStatus
pr_LoadViaDyld(const char *name, PRLibrary *lm)
{
lm->dlh = pr_LoadMachDyldModule(name);
if (lm->dlh == NULL) {
lm->image = NSAddImage(name, NSADDIMAGE_OPTION_RETURN_ON_ERROR
| NSADDIMAGE_OPTION_WITH_SEARCHING);
if (lm->image == NULL) {
NSLinkEditErrors linkEditError;
int errorNum;
const char *errorString;
const char *fileName;
NSLinkEditError(&linkEditError, &errorNum, &fileName, &errorString);
PR_LOG(_pr_linker_lm, PR_LOG_MIN,
("LoadMachDyldModule error %d:%d for file %s:\n%s",
linkEditError, errorNum, fileName, errorString));
}
}
return (lm->dlh != NULL || lm->image != NULL) ? PR_SUCCESS : PR_FAILURE;
}
#endif /* XP_MACOSX && USE_MACH_DYLD */
/*
** Dynamically load a library. Only load libraries once, so scan the load
** map first.
*/
static PRLibrary*
pr_LoadLibraryByPathname(const char *name, PRIntn flags)
{
PRLibrary *lm;
PRLibrary* result = NULL;
PRInt32 oserr;
#ifdef WIN32
char utf8name_stack[MAX_PATH];
char *utf8name_malloc = NULL;
char *utf8name = utf8name_stack;
PRUnichar wname_stack[MAX_PATH];
PRUnichar *wname_malloc = NULL;
PRUnichar *wname = wname_stack;
int len;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
/* See if library is already loaded */
PR_EnterMonitor(pr_linker_lock);
#ifdef WIN32
if (flags & PR_LD_PATHW) {
/* cast back what's cast to |char *| for the argument passing. */
wname = (LPWSTR) name;
} else {
int wlen = MultiByteToWideChar(CP_ACP, 0, name, -1, NULL, 0);
if (wlen > MAX_PATH)
wname = wname_malloc = PR_Malloc(wlen * sizeof(PRUnichar));
if (wname == NULL ||
!MultiByteToWideChar(CP_ACP, 0, name, -1, wname, wlen)) {
oserr = _MD_ERRNO();
goto unlock;
}
}
len = WideCharToMultiByte(CP_UTF8, 0, wname, -1, NULL, 0, NULL, NULL);
if (len > MAX_PATH)
utf8name = utf8name_malloc = PR_Malloc(len);
if (utf8name == NULL ||
!WideCharToMultiByte(CP_UTF8, 0, wname, -1,
utf8name, len, NULL, NULL)) {
oserr = _MD_ERRNO();
goto unlock;
}
/* the list of loaded library names are always kept in UTF-8
* on Win32 platforms */
result = pr_UnlockedFindLibrary(utf8name);
#else
result = pr_UnlockedFindLibrary(name);
#endif
if (result != NULL) goto unlock;
lm = PR_NEWZAP(PRLibrary);
if (lm == NULL) {
oserr = _MD_ERRNO();
goto unlock;
}
lm->staticTable = NULL;
#ifdef XP_OS2 /* Why isn't all this stuff in MD code?! */
{
HMODULE h;
UCHAR pszError[_MAX_PATH];
ULONG ulRc = NO_ERROR;
ulRc = DosLoadModule(pszError, _MAX_PATH, (PSZ) name, &h);
if (ulRc != NO_ERROR) {
oserr = ulRc;
PR_DELETE(lm);
goto unlock;
}
lm->name = strdup(name);
lm->dlh = h;
lm->next = pr_loadmap;
pr_loadmap = lm;
}
#endif /* XP_OS2 */
#ifdef WIN32
{
HINSTANCE h;
h = LoadLibraryExW(wname, NULL,
(flags & PR_LD_ALT_SEARCH_PATH) ?
LOAD_WITH_ALTERED_SEARCH_PATH : 0);
if (h == NULL) {
oserr = _MD_ERRNO();
PR_DELETE(lm);
goto unlock;
}
lm->name = strdup(utf8name);
lm->dlh = h;
lm->next = pr_loadmap;
pr_loadmap = lm;
}
#endif /* WIN32 */
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
{
int i;
PRStatus status;
static const macLibraryLoadProc loadProcs[] = {
#ifdef __ppc__
pr_LoadViaDyld, pr_LoadCFBundle, pr_LoadViaCFM
#else /* __ppc__ */
pr_LoadViaDyld, pr_LoadCFBundle
#endif /* __ppc__ */
};
for (i = 0; i < sizeof(loadProcs) / sizeof(loadProcs[0]); i++) {
if ((status = loadProcs[i](name, lm)) == PR_SUCCESS)
break;
}
if (status != PR_SUCCESS) {
oserr = cfragNoLibraryErr;
PR_DELETE(lm);
goto unlock;
}
lm->name = strdup(name);
lm->next = pr_loadmap;
pr_loadmap = lm;
}
#endif
#if defined(XP_UNIX) && !(defined(XP_MACOSX) && defined(USE_MACH_DYLD))
#ifdef HAVE_DLL
{
#if defined(USE_DLFCN)
#ifdef NTO
/* Neutrino needs RTLD_GROUP to load Netscape plugins. (bug 71179) */
int dl_flags = RTLD_GROUP;
#elif defined(AIX)
/* AIX needs RTLD_MEMBER to load an archive member. (bug 228899) */
int dl_flags = RTLD_MEMBER;
#else
int dl_flags = 0;
#endif
void *h = NULL;
if (flags & PR_LD_LAZY) {
dl_flags |= RTLD_LAZY;
}
if (flags & PR_LD_NOW) {
dl_flags |= RTLD_NOW;
}
if (flags & PR_LD_GLOBAL) {
dl_flags |= RTLD_GLOBAL;
}
if (flags & PR_LD_LOCAL) {
dl_flags |= RTLD_LOCAL;
}
#if defined(DARWIN)
/* ensure the file exists if it contains a slash character i.e. path */
/* DARWIN's dlopen ignores the provided path and checks for the */
/* plain filename in DYLD_LIBRARY_PATH */
if (strchr(name, PR_DIRECTORY_SEPARATOR) == NULL ||
PR_Access(name, PR_ACCESS_EXISTS) == PR_SUCCESS) {
h = dlopen(name, dl_flags);
}
#else
h = dlopen(name, dl_flags);
#endif
#elif defined(USE_HPSHL)
int shl_flags = 0;
shl_t h;
/*
* Use the DYNAMIC_PATH flag only if 'name' is a plain file
* name (containing no directory) to match the behavior of
* dlopen().
*/
if (strchr(name, PR_DIRECTORY_SEPARATOR) == NULL) {
shl_flags |= DYNAMIC_PATH;
}
if (flags & PR_LD_LAZY) {
shl_flags |= BIND_DEFERRED;
}
if (flags & PR_LD_NOW) {
shl_flags |= BIND_IMMEDIATE;
}
/* No equivalent of PR_LD_GLOBAL and PR_LD_LOCAL. */
h = shl_load(name, shl_flags, 0L);
#elif defined(USE_MACH_DYLD)
NSModule h = pr_LoadMachDyldModule(name);
#else
#error Configuration error
#endif
if (!h) {
oserr = _MD_ERRNO();
PR_DELETE(lm);
goto unlock;
}
lm->name = strdup(name);
lm->dlh = h;
lm->next = pr_loadmap;
pr_loadmap = lm;
}
#endif /* HAVE_DLL */
#endif /* XP_UNIX && !(XP_MACOSX && USE_MACH_DYLD) */
lm->refCount = 1;
#ifdef XP_BEOS
{
image_info info;
int32 cookie = 0;
image_id imageid = B_ERROR;
image_id stubid = B_ERROR;
PRLibrary *p;
for (p = pr_loadmap; p != NULL; p = p->next) {
/* hopefully, our caller will always use the same string
to refer to the same library */
if (strcmp(name, p->name) == 0) {
/* we've already loaded this library */
imageid = info.id;
lm->refCount++;
break;
}
}
if(imageid == B_ERROR) {
/* it appears the library isn't yet loaded - load it now */
char stubName [B_PATH_NAME_LENGTH + 1];
/* the following is a work-around to a "bug" in the beos -
the beos system loader allows only 32M (system-wide)
to be used by code loaded as "add-ons" (code loaded
through the 'load_add_on()' system call, which includes
mozilla components), but allows 256M to be used by
shared libraries.
unfortunately, mozilla is too large to fit into the
"add-on" space, so we must trick the loader into
loading some of the components as shared libraries. this
is accomplished by creating a "stub" add-on (an empty
shared object), and linking it with the component
(the actual .so file generated by the build process,
without any modifications). when this stub is loaded
by load_add_on(), the loader will automatically load the
component into the shared library space.
*/
strcpy(stubName, name);
strcat(stubName, ".stub");
/* first, attempt to load the stub (thereby loading the
component as a shared library */
if ((stubid = load_add_on(stubName)) > B_ERROR) {
/* the stub was loaded successfully. */
imageid = B_FILE_NOT_FOUND;
cookie = 0;
while (get_next_image_info(0, &cookie, &info) == B_OK) {
const char *endOfSystemName = strrchr(info.name, '/');
const char *endOfPassedName = strrchr(name, '/');
if( 0 == endOfSystemName )
endOfSystemName = info.name;
else
endOfSystemName++;
if( 0 == endOfPassedName )
endOfPassedName = name;
else
endOfPassedName++;
if (strcmp(endOfSystemName, endOfPassedName) == 0) {
/* this is the actual component - remember it */
imageid = info.id;
break;
}
}
} else {
/* we failed to load the "stub" - try to load the
component directly as an add-on */
stubid = B_ERROR;
imageid = load_add_on(name);
}
}
if (imageid <= B_ERROR) {
oserr = imageid;
PR_DELETE( lm );
goto unlock;
}
lm->name = strdup(name);
lm->dlh = (void*)imageid;
lm->stub_dlh = (void*)stubid;
lm->next = pr_loadmap;
pr_loadmap = lm;
}
#endif
result = lm; /* success */
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("Loaded library %s (load lib)", lm->name));
unlock:
if (result == NULL) {
PR_SetError(PR_LOAD_LIBRARY_ERROR, oserr);
DLLErrorInternal(oserr); /* sets error text */
}
#ifdef WIN32
if (utf8name_malloc)
PR_Free(utf8name_malloc);
if (wname_malloc)
PR_Free(wname_malloc);
#endif
PR_ExitMonitor(pr_linker_lock);
return result;
}
/*
** Unload a shared library which was loaded via PR_LoadLibrary
*/
PR_IMPLEMENT(PRStatus)
PR_UnloadLibrary(PRLibrary *lib)
{
int result = 0;
PRStatus status = PR_SUCCESS;
if ((lib == 0) || (lib->refCount <= 0)) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
PR_EnterMonitor(pr_linker_lock);
if (--lib->refCount > 0) {
PR_LOG(_pr_linker_lm, PR_LOG_MIN,
("%s decr => %d",
lib->name, lib->refCount));
goto done;
}
#ifdef XP_BEOS
if(((image_id)lib->stub_dlh) == B_ERROR)
unload_add_on( (image_id) lib->dlh );
else
unload_add_on( (image_id) lib->stub_dlh);
#endif
#ifdef XP_UNIX
#ifdef HAVE_DLL
#ifdef USE_DLFCN
result = dlclose(lib->dlh);
#elif defined(USE_HPSHL)
result = shl_unload(lib->dlh);
#elif defined(USE_MACH_DYLD)
if (lib->dlh)
result = NSUnLinkModule(lib->dlh, NSUNLINKMODULE_OPTION_NONE) ? 0 : -1;
#else
#error Configuration error
#endif
#endif /* HAVE_DLL */
#endif /* XP_UNIX */
#ifdef XP_PC
if (lib->dlh) {
FreeLibrary((HINSTANCE)(lib->dlh));
lib->dlh = (HINSTANCE)NULL;
}
#endif /* XP_PC */
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
/* Close the connection */
if (lib->connection)
CloseConnection(&(lib->connection));
if (lib->bundle)
CFRelease(lib->bundle);
if (lib->wrappers)
CFRelease(lib->wrappers);
/* No way to unload an image (lib->image) */
#endif
/* unlink from library search list */
if (pr_loadmap == lib)
pr_loadmap = pr_loadmap->next;
else if (pr_loadmap != NULL) {
PRLibrary* prev = pr_loadmap;
PRLibrary* next = pr_loadmap->next;
while (next != NULL) {
if (next == lib) {
prev->next = next->next;
goto freeLib;
}
prev = next;
next = next->next;
}
/*
* fail (the library is not on the _pr_loadmap list),
* but don't wipe out an error from dlclose/shl_unload.
*/
PR_ASSERT(!"_pr_loadmap and lib->refCount inconsistent");
if (result == 0) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
status = PR_FAILURE;
}
}
/*
* We free the PRLibrary structure whether dlclose/shl_unload
* succeeds or not.
*/
freeLib:
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("Unloaded library %s", lib->name));
free(lib->name);
lib->name = NULL;
PR_DELETE(lib);
if (result != 0) {
PR_SetError(PR_UNLOAD_LIBRARY_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
status = PR_FAILURE;
}
done:
PR_ExitMonitor(pr_linker_lock);
return status;
}
static void*
pr_FindSymbolInLib(PRLibrary *lm, const char *name)
{
void *f = NULL;
#ifdef XP_OS2
int rc;
#endif
if (lm->staticTable != NULL) {
const PRStaticLinkTable* tp;
for (tp = lm->staticTable; tp->name; tp++) {
if (strcmp(name, tp->name) == 0) {
return (void*) tp->fp;
}
}
/*
** If the symbol was not found in the static table then check if
** the symbol was exported in the DLL... Win16 only!!
*/
#if !defined(WIN16) && !defined(XP_BEOS)
PR_SetError(PR_FIND_SYMBOL_ERROR, 0);
return (void*)NULL;
#endif
}
#ifdef XP_OS2
rc = DosQueryProcAddr(lm->dlh, 0, (PSZ) name, (PFN *) &f);
#if defined(NEED_LEADING_UNDERSCORE)
/*
* Older plugins (not built using GCC) will have symbols that are not
* underscore prefixed. We check for that here.
*/
if (rc != NO_ERROR) {
name++;
DosQueryProcAddr(lm->dlh, 0, (PSZ) name, (PFN *) &f);
}
#endif
#endif /* XP_OS2 */
#ifdef WIN32
f = GetProcAddress(lm->dlh, name);
#endif /* WIN32 */
#if defined(XP_MACOSX) && defined(USE_MACH_DYLD)
/* add this offset to skip the leading underscore in name */
#define SYM_OFFSET 1
if (lm->bundle) {
CFStringRef nameRef = CFStringCreateWithCString(NULL, name + SYM_OFFSET, kCFStringEncodingASCII);
if (nameRef) {
f = CFBundleGetFunctionPointerForName(lm->bundle, nameRef);
CFRelease(nameRef);
}
}
if (lm->connection) {
Ptr symAddr;
CFragSymbolClass symClass;
Str255 pName;
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("Looking up symbol: %s", name + SYM_OFFSET));
c2pstrcpy(pName, name + SYM_OFFSET);
f = (FindSymbol(lm->connection, pName, &symAddr, &symClass) == noErr) ? symAddr : NULL;
#ifdef __ppc__
/* callers expect mach-o function pointers, so must wrap tvectors with glue. */
if (f && symClass == kTVectorCFragSymbol) {
f = TV2FP(lm->wrappers, name + SYM_OFFSET, f);
}
#endif /* __ppc__ */
if (f == NULL && strcmp(name + SYM_OFFSET, "main") == 0) f = lm->main;
}
if (lm->image) {
NSSymbol symbol;
symbol = NSLookupSymbolInImage(lm->image, name,
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND
| NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
if (symbol != NULL)
f = NSAddressOfSymbol(symbol);
else
f = NULL;
}
#undef SYM_OFFSET
#endif /* XP_MACOSX && USE_MACH_DYLD */
#ifdef XP_BEOS
if( B_NO_ERROR != get_image_symbol( (image_id)lm->dlh, name, B_SYMBOL_TYPE_TEXT, &f ) ) {
f = NULL;
}
#endif
#ifdef XP_UNIX
#ifdef HAVE_DLL
#ifdef USE_DLFCN
f = dlsym(lm->dlh, name);
#elif defined(USE_HPSHL)
if (shl_findsym(&lm->dlh, name, TYPE_PROCEDURE, &f) == -1) {
f = NULL;
}
#elif defined(USE_MACH_DYLD)
if (lm->dlh) {
NSSymbol symbol;
symbol = NSLookupSymbolInModule(lm->dlh, name);
if (symbol != NULL)
f = NSAddressOfSymbol(symbol);
else
f = NULL;
}
#endif
#endif /* HAVE_DLL */
#endif /* XP_UNIX */
if (f == NULL) {
PR_SetError(PR_FIND_SYMBOL_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
}
return f;
}
/*
** Called by class loader to resolve missing native's
*/
PR_IMPLEMENT(void*)
PR_FindSymbol(PRLibrary *lib, const char *raw_name)
{
void *f = NULL;
#if defined(NEED_LEADING_UNDERSCORE)
char *name;
#else
const char *name;
#endif
/*
** Mangle the raw symbol name in any way that is platform specific.
*/
#if defined(NEED_LEADING_UNDERSCORE)
/* Need a leading _ */
name = PR_smprintf("_%s", raw_name);
#elif defined(AIX)
/*
** AIX with the normal linker put's a "." in front of the symbol
** name. When use "svcc" and "svld" then the "." disappears. Go
** figure.
*/
name = raw_name;
#else
name = raw_name;
#endif
PR_EnterMonitor(pr_linker_lock);
PR_ASSERT(lib != NULL);
f = pr_FindSymbolInLib(lib, name);
#if defined(NEED_LEADING_UNDERSCORE)
PR_smprintf_free(name);
#endif
PR_ExitMonitor(pr_linker_lock);
return f;
}
/*
** Return the address of the function 'raw_name' in the library 'lib'
*/
PR_IMPLEMENT(PRFuncPtr)
PR_FindFunctionSymbol(PRLibrary *lib, const char *raw_name)
{
return ((PRFuncPtr) PR_FindSymbol(lib, raw_name));
}
PR_IMPLEMENT(void*)
PR_FindSymbolAndLibrary(const char *raw_name, PRLibrary* *lib)
{
void *f = NULL;
#if defined(NEED_LEADING_UNDERSCORE)
char *name;
#else
const char *name;
#endif
PRLibrary* lm;
if (!_pr_initialized) _PR_ImplicitInitialization();
/*
** Mangle the raw symbol name in any way that is platform specific.
*/
#if defined(NEED_LEADING_UNDERSCORE)
/* Need a leading _ */
name = PR_smprintf("_%s", raw_name);
#elif defined(AIX)
/*
** AIX with the normal linker put's a "." in front of the symbol
** name. When use "svcc" and "svld" then the "." disappears. Go
** figure.
*/
name = raw_name;
#else
name = raw_name;
#endif
PR_EnterMonitor(pr_linker_lock);
/* search all libraries */
for (lm = pr_loadmap; lm != NULL; lm = lm->next) {
f = pr_FindSymbolInLib(lm, name);
if (f != NULL) {
*lib = lm;
lm->refCount++;
PR_LOG(_pr_linker_lm, PR_LOG_MIN,
("%s incr => %d (for %s)",
lm->name, lm->refCount, name));
break;
}
}
#if defined(NEED_LEADING_UNDERSCORE)
PR_smprintf_free(name);
#endif
PR_ExitMonitor(pr_linker_lock);
return f;
}
PR_IMPLEMENT(PRFuncPtr)
PR_FindFunctionSymbolAndLibrary(const char *raw_name, PRLibrary* *lib)
{
return ((PRFuncPtr) PR_FindSymbolAndLibrary(raw_name, lib));
}
/*
** Add a static library to the list of loaded libraries. If LoadLibrary
** is called with the name then we will pretend it was already loaded
*/
PR_IMPLEMENT(PRLibrary*)
PR_LoadStaticLibrary(const char *name, const PRStaticLinkTable *slt)
{
PRLibrary *lm=NULL;
PRLibrary* result = NULL;
if (!_pr_initialized) _PR_ImplicitInitialization();
/* See if library is already loaded */
PR_EnterMonitor(pr_linker_lock);
/* If the lbrary is already loaded, then add the static table information... */
result = pr_UnlockedFindLibrary(name);
if (result != NULL) {
PR_ASSERT( (result->staticTable == NULL) || (result->staticTable == slt) );
result->staticTable = slt;
goto unlock;
}
/* Add library to list...Mark it static */
lm = PR_NEWZAP(PRLibrary);
if (lm == NULL) goto unlock;
lm->name = strdup(name);
lm->refCount = 1;
lm->dlh = pr_exe_loadmap ? pr_exe_loadmap->dlh : 0;
lm->staticTable = slt;
lm->next = pr_loadmap;
pr_loadmap = lm;
result = lm; /* success */
PR_ASSERT(lm->refCount == 1);
PR_LOG(_pr_linker_lm, PR_LOG_MIN, ("Loaded library %s (static lib)", lm->name));
unlock:
PR_ExitMonitor(pr_linker_lock);
return result;
}
PR_IMPLEMENT(char *)
PR_GetLibraryFilePathname(const char *name, PRFuncPtr addr)
{
#if defined(USE_DLFCN) && !defined(ANDROID) && (defined(SOLARIS) || defined(FREEBSD) \
|| defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
|| defined(DARWIN))
Dl_info dli;
char *result;
if (dladdr((void *)addr, &dli) == 0) {
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
return NULL;
}
result = PR_Malloc(strlen(dli.dli_fname)+1);
if (result != NULL) {
strcpy(result, dli.dli_fname);
}
return result;
#elif defined(USE_MACH_DYLD)
char *result;
const char *image_name;
int i, count = _dyld_image_count();
for (i = 0; i < count; i++) {
image_name = _dyld_get_image_name(i);
if (strstr(image_name, name) != NULL) {
result = PR_Malloc(strlen(image_name)+1);
if (result != NULL) {
strcpy(result, image_name);
}
return result;
}
}
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, 0);
return NULL;
#elif defined(AIX)
char *result;
#define LD_INFO_INCREMENT 64
struct ld_info *info;
unsigned int info_length = LD_INFO_INCREMENT * sizeof(struct ld_info);
struct ld_info *infop;
int loadflags = L_GETINFO | L_IGNOREUNLOAD;
for (;;) {
info = PR_Malloc(info_length);
if (info == NULL) {
return NULL;
}
/* If buffer is too small, loadquery fails with ENOMEM. */
if (loadquery(loadflags, info, info_length) != -1) {
break;
}
/*
* Calling loadquery when compiled for 64-bit with the
* L_IGNOREUNLOAD flag can cause an invalid argument error
* on AIX 5.1. Detect this error the first time that
* loadquery is called, and try calling it again without
* this flag set.
*/
if (errno == EINVAL && (loadflags & L_IGNOREUNLOAD)) {
loadflags &= ~L_IGNOREUNLOAD;
if (loadquery(loadflags, info, info_length) != -1) {
break;
}
}
PR_Free(info);
if (errno != ENOMEM) {
/* should not happen */
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
return NULL;
}
/* retry with a larger buffer */
info_length += LD_INFO_INCREMENT * sizeof(struct ld_info);
}
for (infop = info;
;
infop = (struct ld_info *)((char *)infop + infop->ldinfo_next)) {
unsigned long start = (unsigned long)infop->ldinfo_dataorg;
unsigned long end = start + infop->ldinfo_datasize;
if (start <= (unsigned long)addr && end > (unsigned long)addr) {
result = PR_Malloc(strlen(infop->ldinfo_filename)+1);
if (result != NULL) {
strcpy(result, infop->ldinfo_filename);
}
break;
}
if (!infop->ldinfo_next) {
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, 0);
result = NULL;
break;
}
}
PR_Free(info);
return result;
#elif defined(OSF1)
/* Contributed by Steve Streeter of HP */
ldr_process_t process, ldr_my_process();
ldr_module_t mod_id;
ldr_module_info_t info;
ldr_region_t regno;
ldr_region_info_t reginfo;
size_t retsize;
int rv;
char *result;
/* Get process for which dynamic modules will be listed */
process = ldr_my_process();
/* Attach to process */
rv = ldr_xattach(process);
if (rv) {
/* should not happen */
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
return NULL;
}
/* Print information for list of modules */
mod_id = LDR_NULL_MODULE;
for (;;) {
/* Get information for the next module in the module list. */
ldr_next_module(process, &mod_id);
if (ldr_inq_module(process, mod_id, &info, sizeof(info),
&retsize) != 0) {
/* No more modules */
break;
}
if (retsize < sizeof(info)) {
continue;
}
/*
* Get information for each region in the module and check if any
* contain the address of this function.
*/
for (regno = 0; ; regno++) {
if (ldr_inq_region(process, mod_id, regno, &reginfo,
sizeof(reginfo), &retsize) != 0) {
/* No more regions */
break;
}
if (((unsigned long)reginfo.lri_mapaddr <=
(unsigned long)addr) &&
(((unsigned long)reginfo.lri_mapaddr + reginfo.lri_size) >
(unsigned long)addr)) {
/* Found it. */
result = PR_Malloc(strlen(info.lmi_name)+1);
if (result != NULL) {
strcpy(result, info.lmi_name);
}
return result;
}
}
}
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, 0);
return NULL;
#elif defined(HPUX) && defined(USE_HPSHL)
int index;
struct shl_descriptor desc;
char *result;
for (index = 0; shl_get_r(index, &desc) == 0; index++) {
if (strstr(desc.filename, name) != NULL) {
result = PR_Malloc(strlen(desc.filename)+1);
if (result != NULL) {
strcpy(result, desc.filename);
}
return result;
}
}
/*
* Since the index value of a library is decremented if
* a library preceding it in the shared library search
* list was unloaded, it is possible that we missed some
* libraries as we went up the list. So we should go
* down the list to be sure that we not miss anything.
*/
for (index--; index >= 0; index--) {
if ((shl_get_r(index, &desc) == 0)
&& (strstr(desc.filename, name) != NULL)) {
result = PR_Malloc(strlen(desc.filename)+1);
if (result != NULL) {
strcpy(result, desc.filename);
}
return result;
}
}
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, 0);
return NULL;
#elif defined(HPUX) && defined(USE_DLFCN)
struct load_module_desc desc;
char *result;
const char *module_name;
if (dlmodinfo((unsigned long)addr, &desc, sizeof desc, NULL, 0, 0) == 0) {
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
return NULL;
}
module_name = dlgetname(&desc, sizeof desc, NULL, 0, 0);
if (module_name == NULL) {
/* should not happen */
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
return NULL;
}
result = PR_Malloc(strlen(module_name)+1);
if (result != NULL) {
strcpy(result, module_name);
}
return result;
#elif defined(WIN32)
PRUnichar wname[MAX_PATH];
HMODULE handle = NULL;
PRUnichar module_name[MAX_PATH];
int len;
char *result;
if (MultiByteToWideChar(CP_ACP, 0, name, -1, wname, MAX_PATH)) {
handle = GetModuleHandleW(wname);
}
if (handle == NULL) {
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
return NULL;
}
if (GetModuleFileNameW(handle, module_name, MAX_PATH) == 0) {
/* should not happen */
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
return NULL;
}
len = WideCharToMultiByte(CP_ACP, 0, module_name, -1,
NULL, 0, NULL, NULL);
if (len == 0) {
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
return NULL;
}
result = PR_Malloc(len * sizeof(PRUnichar));
if (result != NULL) {
WideCharToMultiByte(CP_ACP, 0, module_name, -1,
result, len, NULL, NULL);
}
return result;
#elif defined(XP_OS2)
HMODULE module = NULL;
char module_name[_MAX_PATH];
char *result;
APIRET ulrc = DosQueryModFromEIP(&module, NULL, 0, NULL, NULL, (ULONG) addr);
if ((NO_ERROR != ulrc) || (NULL == module) ) {
PR_SetError(PR_LIBRARY_NOT_LOADED_ERROR, _MD_ERRNO());
DLLErrorInternal(_MD_ERRNO());
return NULL;
}
ulrc = DosQueryModuleName(module, sizeof module_name, module_name);
if (NO_ERROR != ulrc) {
/* should not happen */
_PR_MD_MAP_DEFAULT_ERROR(_MD_ERRNO());
return NULL;
}
result = PR_Malloc(strlen(module_name)+1);
if (result != NULL) {
strcpy(result, module_name);
}
return result;
#else
PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
return NULL;
#endif
}