/* * Win32 builtin dlls support * * Copyright 2000 Alexandre Julliard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "config.h" #include "wine/port.h" #include #include #include #include #include #include #include #ifdef HAVE_SYS_MMAN_H #include #endif #ifdef HAVE_UNISTD_H # include #endif #define NONAMELESSUNION #define NONAMELESSSTRUCT #include "windef.h" #include "winbase.h" #include "wine/library.h" #ifdef __APPLE__ #include #define environ (*_NSGetEnviron()) #else extern char **environ; #endif /* argc/argv for the Windows application */ int __wine_main_argc = 0; char **__wine_main_argv = NULL; WCHAR **__wine_main_wargv = NULL; char **__wine_main_environ = NULL; struct dll_path_context { int index; char *buffer; }; #define MAX_DLLS 100 static struct { const IMAGE_NT_HEADERS *nt; /* NT header */ const char *filename; /* DLL file name */ } builtin_dlls[MAX_DLLS]; static int nb_dlls; static const IMAGE_NT_HEADERS *main_exe; static load_dll_callback_t load_dll_callback; static const char **dll_paths; static int nb_dll_paths; static int dll_path_maxlen; extern void mmap_init(void); /* build the dll load path from the WINEDLLPATH variable */ static void build_dll_path(void) { static const char * const dlldir = DLLDIR; int len, count = 0; char *p, *path = getenv( "WINEDLLPATH" ); if (path) { /* count how many path elements we need */ path = strdup(path); p = path; while (*p) { while (*p == ':') p++; if (!*p) break; count++; while (*p && *p != ':') p++; } } dll_paths = malloc( (count+1) * sizeof(*dll_paths) ); if (count) { p = path; nb_dll_paths = 0; while (*p) { while (*p == ':') *p++ = 0; if (!*p) break; dll_paths[nb_dll_paths] = p; while (*p && *p != ':') p++; if (p - dll_paths[nb_dll_paths] > dll_path_maxlen) dll_path_maxlen = p - dll_paths[nb_dll_paths]; nb_dll_paths++; } } /* append default dll dir (if not empty) to path */ if ((len = strlen(dlldir))) { if (len > dll_path_maxlen) dll_path_maxlen = len; dll_paths[nb_dll_paths++] = dlldir; } } /* check if a given file can be opened */ inline static int file_exists( const char *name ) { int fd = open( name, O_RDONLY ); if (fd != -1) close( fd ); return (fd != -1); } /* get a filename from the next entry in the dll path */ static char *next_dll_path( struct dll_path_context *context ) { int index = context->index++; if (index < nb_dll_paths) { int len = strlen( dll_paths[index] ); char *path = context->buffer + dll_path_maxlen - len; memcpy( path, dll_paths[index], len ); return path; } return NULL; } /* get a filename from the first entry in the dll path */ static char *first_dll_path( const char *name, const char *ext, struct dll_path_context *context ) { char *p; int namelen = strlen( name ); context->buffer = p = malloc( dll_path_maxlen + namelen + strlen(ext) + 2 ); context->index = 0; /* store the name at the end of the buffer, followed by extension */ p += dll_path_maxlen; *p++ = '/'; memcpy( p, name, namelen ); strcpy( p + namelen, ext ); return next_dll_path( context ); } /* free the dll path context created by first_dll_path */ inline static void free_dll_path( struct dll_path_context *context ) { free( context->buffer ); } /* open a library for a given dll, searching in the dll path * 'name' must be the Windows dll name (e.g. "kernel32.dll") */ static void *dlopen_dll( const char *name, char *error, int errorsize, int test_only, int *exists ) { struct dll_path_context context; char *path; void *ret = NULL; *exists = 0; for (path = first_dll_path( name, ".so", &context ); path; path = next_dll_path( &context )) { if (!test_only && (ret = wine_dlopen( path, RTLD_NOW, error, errorsize ))) break; if ((*exists = file_exists( path ))) break; /* exists but cannot be loaded, return the error */ } free_dll_path( &context ); return ret; } /* adjust an array of pointers to make them into RVAs */ static inline void fixup_rva_ptrs( void *array, void *base, int count ) { void **ptr = (void **)array; while (count--) { if (*ptr) *ptr = (void *)((char *)*ptr - (char *)base); ptr++; } } /* fixup RVAs in the import directory */ static void fixup_imports( IMAGE_IMPORT_DESCRIPTOR *dir, DWORD size, void *base ) { int count = size / sizeof(void *); void **ptr = (void **)dir; /* everything is either a pointer or an ordinal value below 0x10000 */ while (count--) { if (*ptr >= (void *)0x10000) *ptr = (void *)((char *)*ptr - (char *)base); else if (*ptr) *ptr = (void *)(0x80000000 | (unsigned int)*ptr); ptr++; } } /* fixup RVAs in the resource directory */ static void fixup_resources( IMAGE_RESOURCE_DIRECTORY *dir, char *root, void *base ) { IMAGE_RESOURCE_DIRECTORY_ENTRY *entry; int i; entry = (IMAGE_RESOURCE_DIRECTORY_ENTRY *)(dir + 1); for (i = 0; i < dir->NumberOfNamedEntries + dir->NumberOfIdEntries; i++, entry++) { void *ptr = root + entry->u2.s3.OffsetToDirectory; if (entry->u2.s3.DataIsDirectory) fixup_resources( ptr, root, base ); else { IMAGE_RESOURCE_DATA_ENTRY *data = ptr; fixup_rva_ptrs( &data->OffsetToData, base, 1 ); } } } /* map a builtin dll in memory and fixup RVAs */ static void *map_dll( const IMAGE_NT_HEADERS *nt_descr ) { #ifdef HAVE_MMAP IMAGE_DATA_DIRECTORY *dir; IMAGE_DOS_HEADER *dos; IMAGE_NT_HEADERS *nt; IMAGE_SECTION_HEADER *sec; BYTE *addr; DWORD code_start, data_start, data_end; const size_t page_size = getpagesize(); const size_t page_mask = page_size - 1; int nb_sections = 2; /* code + data */ size_t size = (sizeof(IMAGE_DOS_HEADER) + sizeof(IMAGE_NT_HEADERS) + nb_sections * sizeof(IMAGE_SECTION_HEADER)); assert( size <= page_size ); /* module address must be aligned on 64K boundary */ addr = (BYTE *)((nt_descr->OptionalHeader.ImageBase + 0xffff) & ~0xffff); if (wine_anon_mmap( addr, page_size, PROT_READ|PROT_WRITE, MAP_FIXED ) != addr) return NULL; dos = (IMAGE_DOS_HEADER *)addr; nt = (IMAGE_NT_HEADERS *)(dos + 1); sec = (IMAGE_SECTION_HEADER *)(nt + 1); /* Build the DOS and NT headers */ dos->e_magic = IMAGE_DOS_SIGNATURE; dos->e_cblp = sizeof(*dos); dos->e_cp = 1; dos->e_cparhdr = (sizeof(*dos)+0xf)/0x10; dos->e_minalloc = 0; dos->e_maxalloc = 0xffff; dos->e_ss = 0x0000; dos->e_sp = 0x00b8; dos->e_lfarlc = sizeof(*dos); dos->e_lfanew = sizeof(*dos); *nt = *nt_descr; code_start = page_size; data_start = ((BYTE *)nt->OptionalHeader.BaseOfData - addr) & ~page_mask; data_end = (((BYTE *)nt->OptionalHeader.SizeOfImage - addr) + page_mask) & ~page_mask; nt->FileHeader.NumberOfSections = nb_sections; nt->OptionalHeader.BaseOfCode = code_start; nt->OptionalHeader.BaseOfData = data_start; nt->OptionalHeader.SizeOfCode = data_start - code_start; nt->OptionalHeader.SizeOfInitializedData = data_end - data_start; nt->OptionalHeader.SizeOfUninitializedData = 0; nt->OptionalHeader.SizeOfImage = data_end; nt->OptionalHeader.ImageBase = (DWORD)addr; fixup_rva_ptrs( &nt->OptionalHeader.AddressOfEntryPoint, addr, 1 ); /* Build the code section */ memcpy( sec->Name, ".text", sizeof(".text") ); sec->SizeOfRawData = data_start - code_start; sec->Misc.VirtualSize = sec->SizeOfRawData; sec->VirtualAddress = code_start; sec->PointerToRawData = code_start; sec->Characteristics = (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ); sec++; /* Build the data section */ memcpy( sec->Name, ".data", sizeof(".data") ); sec->SizeOfRawData = data_end - data_start; sec->Misc.VirtualSize = sec->SizeOfRawData; sec->VirtualAddress = data_start; sec->PointerToRawData = data_start; sec->Characteristics = (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_WRITE | IMAGE_SCN_MEM_READ); sec++; /* Build the import directory */ dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_IMPORT_DIRECTORY]; if (dir->Size) { IMAGE_IMPORT_DESCRIPTOR *imports = (void *)dir->VirtualAddress; fixup_rva_ptrs( &dir->VirtualAddress, addr, 1 ); fixup_imports( imports, dir->Size, addr ); } /* Build the resource directory */ dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_RESOURCE_DIRECTORY]; if (dir->Size) { void *ptr = (void *)dir->VirtualAddress; fixup_rva_ptrs( &dir->VirtualAddress, addr, 1 ); fixup_resources( ptr, ptr, addr ); } /* Build the export directory */ dir = &nt->OptionalHeader.DataDirectory[IMAGE_FILE_EXPORT_DIRECTORY]; if (dir->Size) { IMAGE_EXPORT_DIRECTORY *exports = (void *)dir->VirtualAddress; fixup_rva_ptrs( &dir->VirtualAddress, addr, 1 ); fixup_rva_ptrs( (void *)exports->AddressOfFunctions, addr, exports->NumberOfFunctions ); fixup_rva_ptrs( (void *)exports->AddressOfNames, addr, exports->NumberOfNames ); fixup_rva_ptrs( &exports->Name, addr, 1 ); fixup_rva_ptrs( &exports->AddressOfFunctions, addr, 1 ); fixup_rva_ptrs( &exports->AddressOfNames, addr, 1 ); fixup_rva_ptrs( &exports->AddressOfNameOrdinals, addr, 1 ); } return addr; #else /* HAVE_MMAP */ return NULL; #endif /* HAVE_MMAP */ } /*********************************************************************** * __wine_dll_register * * Register a built-in DLL descriptor. */ void __wine_dll_register( const IMAGE_NT_HEADERS *header, const char *filename ) { if (load_dll_callback) load_dll_callback( map_dll(header), filename ); else { if (!(header->FileHeader.Characteristics & IMAGE_FILE_DLL)) main_exe = header; else { assert( nb_dlls < MAX_DLLS ); builtin_dlls[nb_dlls].nt = header; builtin_dlls[nb_dlls].filename = filename; nb_dlls++; } } } /*********************************************************************** * wine_dll_set_callback * * Set the callback function for dll loading, and call it * for all dlls that were implicitly loaded already. */ void wine_dll_set_callback( load_dll_callback_t load ) { int i; load_dll_callback = load; for (i = 0; i < nb_dlls; i++) { const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt; if (!nt) continue; builtin_dlls[i].nt = NULL; load_dll_callback( map_dll(nt), builtin_dlls[i].filename ); } nb_dlls = 0; if (main_exe) load_dll_callback( map_dll(main_exe), "" ); } /*********************************************************************** * wine_dll_load * * Load a builtin dll. */ void *wine_dll_load( const char *filename, char *error, int errorsize, int *file_exists ) { int i; /* callback must have been set already */ assert( load_dll_callback ); /* check if we have it in the list */ /* this can happen when initializing pre-loaded dlls in wine_dll_set_callback */ for (i = 0; i < nb_dlls; i++) { if (!builtin_dlls[i].nt) continue; if (!strcmp( builtin_dlls[i].filename, filename )) { const IMAGE_NT_HEADERS *nt = builtin_dlls[i].nt; builtin_dlls[i].nt = NULL; load_dll_callback( map_dll(nt), builtin_dlls[i].filename ); *file_exists = 1; return (void *)1; } } return dlopen_dll( filename, error, errorsize, 0, file_exists ); } /*********************************************************************** * wine_dll_unload * * Unload a builtin dll. */ void wine_dll_unload( void *handle ) { if (handle != (void *)1) wine_dlclose( handle, NULL, 0 ); } /*********************************************************************** * wine_dll_load_main_exe * * Try to load the .so for the main exe. */ void *wine_dll_load_main_exe( const char *name, char *error, int errorsize, int test_only, int *file_exists ) { return dlopen_dll( name, error, errorsize, test_only, file_exists ); } /*********************************************************************** * wine_dll_get_owner * * Retrieve the name of the 32-bit owner dll for a 16-bit dll. * Return 0 if OK, -1 on error. */ int wine_dll_get_owner( const char *name, char *buffer, int size, int *exists ) { int ret = -1; char *path; struct dll_path_context context; *exists = 0; for (path = first_dll_path( name, ".so", &context ); path; path = next_dll_path( &context )) { int res = readlink( path, buffer, size ); if (res != -1) /* got a symlink */ { *exists = 1; if (res < 4 || res >= size) break; buffer[res] = 0; if (strchr( buffer, '/' )) break; /* contains a path, not valid */ if (strcmp( buffer + res - 3, ".so" )) break; /* does not end in .so, not valid */ buffer[res - 3] = 0; /* remove .so */ ret = 0; break; } if ((*exists = file_exists( path ))) break; /* exists but not a symlink, return the error */ } free_dll_path( &context ); return ret; } /*********************************************************************** * debug_usage */ static void debug_usage(void) { static const char usage[] = "Syntax of the WINEDEBUG variable:\n" " WINEDEBUG=[class]+xxx,[class]-yyy,...\n\n" "Example: WINEDEBUG=+all,warn-heap\n" " turns on all messages except warning heap messages\n" "Available message classes: err, warn, fixme, trace\n"; write( 2, usage, sizeof(usage) - 1 ); exit(1); } /*********************************************************************** * wine_init * * Main Wine initialisation. */ void wine_init( int argc, char *argv[], char *error, int error_size ) { char *wine_debug; int file_exists; void *ntdll; void (*init_func)(void); build_dll_path(); wine_init_argv0_path( argv[0] ); __wine_main_argc = argc; __wine_main_argv = argv; __wine_main_environ = environ; mmap_init(); if ((wine_debug = getenv("WINEDEBUG"))) { if (!strcmp( wine_debug, "help" )) debug_usage(); wine_dbg_parse_options( wine_debug ); } if (!(ntdll = dlopen_dll( "ntdll.dll", error, error_size, 0, &file_exists ))) return; if (!(init_func = wine_dlsym( ntdll, "__wine_process_init", error, error_size ))) return; init_func(); } /* * These functions provide wrappers around dlopen() and associated * functions. They work around a bug in glibc 2.1.x where calling * a dl*() function after a previous dl*() function has failed * without a dlerror() call between the two will cause a crash. * They all take a pointer to a buffer that * will receive the error description (from dlerror()). This * parameter may be NULL if the error description is not required. */ #ifndef RTLD_FIRST #define RTLD_FIRST 0 #endif /*********************************************************************** * wine_dlopen */ void *wine_dlopen( const char *filename, int flag, char *error, size_t errorsize ) { #ifdef HAVE_DLOPEN void *ret; const char *s; dlerror(); dlerror(); ret = dlopen( filename, flag | RTLD_FIRST ); s = dlerror(); if (error && errorsize) { if (s) { size_t len = strlen(s); if (len >= errorsize) len = errorsize - 1; memcpy( error, s, len ); error[len] = 0; } else error[0] = 0; } dlerror(); return ret; #else if (error) { static const char msg[] = "dlopen interface not detected by configure"; size_t len = min( errorsize, sizeof(msg) ); memcpy( error, msg, len ); error[len - 1] = 0; } return NULL; #endif } /*********************************************************************** * wine_dlsym */ void *wine_dlsym( void *handle, const char *symbol, char *error, size_t errorsize ) { #ifdef HAVE_DLOPEN void *ret; const char *s; dlerror(); dlerror(); ret = dlsym( handle, symbol ); s = dlerror(); if (error && errorsize) { if (s) { size_t len = strlen(s); if (len >= errorsize) len = errorsize - 1; memcpy( error, s, len ); error[len] = 0; } else error[0] = 0; } dlerror(); return ret; #else if (error) { static const char msg[] = "dlopen interface not detected by configure"; size_t len = min( errorsize, sizeof(msg) ); memcpy( error, msg, len ); error[len - 1] = 0; } return NULL; #endif } /*********************************************************************** * wine_dlclose */ int wine_dlclose( void *handle, char *error, size_t errorsize ) { #ifdef HAVE_DLOPEN int ret; const char *s; dlerror(); dlerror(); ret = dlclose( handle ); s = dlerror(); if (error && errorsize) { if (s) { size_t len = strlen(s); if (len >= errorsize) len = errorsize - 1; memcpy( error, s, len ); error[len] = 0; } else error[0] = 0; } dlerror(); return ret; #else if (error) { static const char msg[] = "dlopen interface not detected by configure"; size_t len = min( errorsize, sizeof(msg) ); memcpy( error, msg, len ); error[len - 1] = 0; } return 1; #endif }