diff options
Diffstat (limited to 'nsprpub/pr/src/linking/prlink.c')
| -rw-r--r-- | nsprpub/pr/src/linking/prlink.c | 1608 |
1 files changed, 1608 insertions, 0 deletions
diff --git a/nsprpub/pr/src/linking/prlink.c b/nsprpub/pr/src/linking/prlink.c new file mode 100644 index 000000000..47154608a --- /dev/null +++ b/nsprpub/pr/src/linking/prlink.c @@ -0,0 +1,1608 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#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(DARWIN) && defined(USE_MACH_DYLD)) \ + || 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); + if (h == NULL) { + NSLinkEditErrors linkEditError; + int errorNum; + const char *fileName; + const char *errorString; + 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)); + } + 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 *fileName; + const char *errorString; + 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) { + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return PR_FAILURE; + } + + PR_EnterMonitor(pr_linker_lock); + + if (lib->refCount <= 0) { + PR_ExitMonitor(pr_linker_lock); + PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0); + return PR_FAILURE; + } + + 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_NOT_REACHED("_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(HAVE_DLADDR) + 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, ®info, + 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 +} |