| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (dylib.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <string.h> |
| 24 | #include <stdio.h> |
| 25 | #include <dynamic/dylib.h> |
| 26 | #include <encodings/utf.h> |
| 27 | |
| 28 | #if defined(ORBIS) |
| 29 | #include <orbis/libkernel.h> |
| 30 | #endif |
| 31 | |
| 32 | #ifdef NEED_DYNAMIC |
| 33 | |
| 34 | #ifdef _WIN32 |
| 35 | #include <compat/posix_string.h> |
| 36 | #include <windows.h> |
| 37 | #else |
| 38 | #if !defined(ORBIS) |
| 39 | #include <dlfcn.h> |
| 40 | #endif |
| 41 | #endif |
| 42 | |
| 43 | /* Assume W-functions do not work below Win2K and Xbox platforms */ |
| 44 | #if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX) |
| 45 | |
| 46 | #ifndef LEGACY_WIN32 |
| 47 | #define LEGACY_WIN32 |
| 48 | #endif |
| 49 | |
| 50 | #endif |
| 51 | |
| 52 | #ifdef _WIN32 |
| 53 | static char last_dyn_error[512]; |
| 54 | |
| 55 | static void set_dl_error(void) |
| 56 | { |
| 57 | DWORD err = GetLastError(); |
| 58 | |
| 59 | if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | |
| 60 | FORMAT_MESSAGE_FROM_SYSTEM, |
| 61 | NULL, |
| 62 | err, |
| 63 | MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT), |
| 64 | last_dyn_error, |
| 65 | sizeof(last_dyn_error) - 1, |
| 66 | NULL) == 0) |
| 67 | snprintf(last_dyn_error, sizeof(last_dyn_error) - 1, |
| 68 | "unknown error %lu", err); |
| 69 | } |
| 70 | #endif |
| 71 | |
| 72 | /** |
| 73 | * dylib_load: |
| 74 | * @path : Path to libretro core library. |
| 75 | * |
| 76 | * Platform independent dylib loading. |
| 77 | * |
| 78 | * @return Library handle on success, otherwise NULL. |
| 79 | **/ |
| 80 | dylib_t dylib_load(const char *path) |
| 81 | { |
| 82 | #ifdef _WIN32 |
| 83 | #ifndef __WINRT__ |
| 84 | int prevmode = SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX); |
| 85 | #endif |
| 86 | #ifdef __WINRT__ |
| 87 | dylib_t lib; |
| 88 | /* On UWP, you can only load DLLs inside your install directory, using a special function that takes a relative path */ |
| 89 | char relative_path_abbrev[PATH_MAX_LENGTH]; |
| 90 | char *relative_path = relative_path_abbrev; |
| 91 | wchar_t *path_wide = NULL; |
| 92 | |
| 93 | relative_path_abbrev[0] = '\0'; |
| 94 | |
| 95 | if (!path_is_absolute(path)) |
| 96 | RARCH_WARN("Relative path in dylib_load! This is likely an attempt to load a system library that will fail\n"); |
| 97 | |
| 98 | fill_pathname_abbreviate_special(relative_path_abbrev, path, sizeof(relative_path_abbrev)); |
| 99 | |
| 100 | /* Path to dylib_load is not inside app install directory. |
| 101 | * Loading will probably fail. */ |
| 102 | if (relative_path[0] != ':' || !PATH_CHAR_IS_SLASH(relative_path[1])) { } |
| 103 | else |
| 104 | relative_path += 2; |
| 105 | |
| 106 | path_wide = utf8_to_utf16_string_alloc(relative_path); |
| 107 | lib = LoadPackagedLibrary(path_wide, 0); |
| 108 | free(path_wide); |
| 109 | #elif defined(LEGACY_WIN32) |
| 110 | dylib_t lib = LoadLibrary(path); |
| 111 | #else |
| 112 | wchar_t *path_wide = utf8_to_utf16_string_alloc(path); |
| 113 | dylib_t lib = LoadLibraryW(path_wide); |
| 114 | free(path_wide); |
| 115 | #endif |
| 116 | |
| 117 | #ifndef __WINRT__ |
| 118 | SetErrorMode(prevmode); |
| 119 | #endif |
| 120 | |
| 121 | if (!lib) |
| 122 | { |
| 123 | set_dl_error(); |
| 124 | return NULL; |
| 125 | } |
| 126 | last_dyn_error[0] = 0; |
| 127 | #elif defined(ORBIS) |
| 128 | int res; |
| 129 | dylib_t lib = (dylib_t)sceKernelLoadStartModule(path, 0, NULL, 0, NULL, &res); |
| 130 | #else |
| 131 | dylib_t lib = dlopen(path, RTLD_LAZY | RTLD_LOCAL); |
| 132 | #endif |
| 133 | return lib; |
| 134 | } |
| 135 | |
| 136 | char *dylib_error(void) |
| 137 | { |
| 138 | #ifdef _WIN32 |
| 139 | if (last_dyn_error[0]) |
| 140 | return last_dyn_error; |
| 141 | return NULL; |
| 142 | #else |
| 143 | return (char*)dlerror(); |
| 144 | #endif |
| 145 | } |
| 146 | |
| 147 | function_t dylib_proc(dylib_t lib, const char *proc) |
| 148 | { |
| 149 | function_t sym; |
| 150 | |
| 151 | #ifdef _WIN32 |
| 152 | HMODULE mod = (HMODULE)lib; |
| 153 | if (!mod) |
| 154 | { |
| 155 | #ifdef __WINRT__ |
| 156 | /* GetModuleHandle is not available on UWP */ |
| 157 | /* It's not possible to lookup symbols in current executable |
| 158 | * on UWP. */ |
| 159 | DebugBreak(); |
| 160 | return NULL; |
| 161 | #else |
| 162 | mod = GetModuleHandle(NULL); |
| 163 | #endif |
| 164 | } |
| 165 | if (!(sym = (function_t)GetProcAddress(mod, proc))) |
| 166 | { |
| 167 | set_dl_error(); |
| 168 | return NULL; |
| 169 | } |
| 170 | last_dyn_error[0] = 0; |
| 171 | #elif defined(ORBIS) |
| 172 | void *ptr_sym = NULL; |
| 173 | sym = NULL; |
| 174 | |
| 175 | if (lib) |
| 176 | { |
| 177 | sceKernelDlsym((SceKernelModule)lib, proc, &ptr_sym); |
| 178 | memcpy(&sym, &ptr_sym, sizeof(void*)); |
| 179 | } |
| 180 | #else |
| 181 | void *ptr_sym = NULL; |
| 182 | |
| 183 | if (lib) |
| 184 | ptr_sym = dlsym(lib, proc); |
| 185 | else |
| 186 | { |
| 187 | void *handle = dlopen(NULL, RTLD_LAZY); |
| 188 | if (handle) |
| 189 | { |
| 190 | ptr_sym = dlsym(handle, proc); |
| 191 | dlclose(handle); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | /* Dirty hack to workaround the non-legality of |
| 196 | * (void*) -> fn-pointer casts. */ |
| 197 | memcpy(&sym, &ptr_sym, sizeof(void*)); |
| 198 | #endif |
| 199 | |
| 200 | return sym; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * dylib_close: |
| 205 | * @lib : Library handle. |
| 206 | * |
| 207 | * Frees library handle. |
| 208 | **/ |
| 209 | void dylib_close(dylib_t lib) |
| 210 | { |
| 211 | #ifdef _WIN32 |
| 212 | if (!FreeLibrary((HMODULE)lib)) |
| 213 | set_dl_error(); |
| 214 | last_dyn_error[0] = 0; |
| 215 | #elif defined(ORBIS) |
| 216 | int res; |
| 217 | sceKernelStopUnloadModule((SceKernelModule)lib, 0, NULL, 0, NULL, &res); |
| 218 | #else |
| 219 | #ifndef NO_DLCLOSE |
| 220 | dlclose(lib); |
| 221 | #endif |
| 222 | #endif |
| 223 | } |
| 224 | |
| 225 | #endif |