diff options
Diffstat (limited to 'nsprpub/pr/src/linking/prlink.c')
| -rw-r--r-- | nsprpub/pr/src/linking/prlink.c | 1142 |
1 files changed, 1142 insertions, 0 deletions
diff --git a/nsprpub/pr/src/linking/prlink.c b/nsprpub/pr/src/linking/prlink.c new file mode 100644 index 0000000000..011ff17e6b --- /dev/null +++ b/nsprpub/pr/src/linking/prlink.c @@ -0,0 +1,1142 @@ +/* -*- 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_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 +#elif defined(USE_HPSHL) +#include <dl.h> +#endif +#endif /* XP_UNIX */ + +#define _PR_DEFAULT_LD_FLAGS PR_LD_LAZY + +/* + * On these platforms, symbols have a leading '_'. + */ +#if 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 + +#ifdef XP_UNIX +#if defined(USE_HPSHL) + shl_t dlh; +#else + void* dlh; +#endif +#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(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) +#if defined(USE_DLFCN) + { + char *p=NULL; + int len; + + ev = getenv("LD_LIBRARY_PATH"); + if (!ev) { + ev = "/usr/lib:/lib"; + } + 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) + 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 */ + 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); +} + +/* +** 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_UNIX) +#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 defined(DARWIN) + PRBool okToLoad = PR_FALSE; +#endif + + 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) + /* If the file contains an absolute or relative path (slash) + * and the path doesn't look like a System path, then require + * the file exists. + * The reason is that DARWIN's dlopen ignores the provided path + * and checks for the plain filename in DYLD_LIBRARY_PATH, + * which could load an unexpected version of a library. */ + if (strchr(name, PR_DIRECTORY_SEPARATOR) == NULL) { + /* no slash, allow to load from any location */ + okToLoad = PR_TRUE; + } else { + const char systemPrefix1[] = "/System/"; + const size_t systemPrefixLen1 = strlen(systemPrefix1); + const char systemPrefix2[] = "/usr/lib/"; + const size_t systemPrefixLen2 = strlen(systemPrefix2); + const size_t name_len = strlen(name); + if (((name_len > systemPrefixLen1) && + (strncmp(name, systemPrefix1, systemPrefixLen1) == 0)) || + ((name_len > systemPrefixLen2) && + (strncmp(name, systemPrefix2, systemPrefixLen2) == 0))) { + /* found at beginning, it's a system library. + * Skip filesystem check (required for macOS 11), + * allow loading from any location */ + okToLoad = PR_TRUE; + } else if (PR_Access(name, PR_ACCESS_EXISTS) == PR_SUCCESS) { + /* file exists, allow to load */ + okToLoad = PR_TRUE; + } + } + if (okToLoad) { + 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); +#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 */ + + lm->refCount = 1; + + 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_UNIX +#ifdef HAVE_DLL +#ifdef USE_DLFCN + result = dlclose(lib->dlh); +#elif defined(USE_HPSHL) + result = shl_unload(lib->dlh); +#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 */ + + /* 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) + 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 */ + +#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; + } +#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(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(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 +} |