1 //===-- DynamicLinker.cpp - Implement DynamicLinker interface -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Lightweight interface to dynamic library linking and loading, and dynamic
11 // symbol lookup functionality, in whatever form the operating system
14 // Possible future extensions include support for the HPUX shl_load()
15 // interface, the Mac OS X NSLinkModule() interface, and the Windows
16 // LoadLibrary() interface.
18 // Note that we assume that if dlopen() is available, then dlsym() is too.
20 //===----------------------------------------------------------------------===//
22 #include "Support/DynamicLinker.h"
23 #include "Config/dlfcn.h"
24 #include "Config/windows.h"
28 bool llvm::LinkDynamicObject (const char *filename, std::string *ErrorMessage) {
29 #if defined (HAVE_DLOPEN)
30 if (dlopen (filename, RTLD_NOW | RTLD_GLOBAL) == 0) {
31 if (ErrorMessage) *ErrorMessage = dlerror ();
35 #elif defined(HAVE_WINDOWS_H)
36 if (LoadLibrary(filename))
40 // FIXME: This should use FormatMessage
41 sprintf(Buffer, "Windows error code %d\n", GetLastError());
42 *ErrorMessage = Buffer;
46 assert (0 && "Dynamic object linking not implemented for this platform");
50 void *llvm::GetAddressOfSymbol (const char *symbolName) {
51 #if defined (HAVE_DLOPEN)
53 return dlsym (RTLD_DEFAULT, symbolName);
55 static void* CurHandle = dlopen(0, RTLD_LAZY);
56 return dlsym(CurHandle, symbolName);
58 #elif defined(HAVE_WINDOWS_H)
59 static HMODULE ModHandle = NULL;
60 if (ModHandle == 0) ModHandle = GetModuleHandle(NULL);
61 return (void*)GetProcAddress(ModHandle, symbolName);
63 assert (0 && "Dynamic symbol lookup not implemented for this platform");
67 // soft, cushiony C++ interface.
68 void *llvm::GetAddressOfSymbol(const std::string &symbolName) {
69 return GetAddressOfSymbol(symbolName.c_str());