diff options
Diffstat (limited to 'winsup/cygwin/dlfcn.cc')
| -rw-r--r-- | winsup/cygwin/dlfcn.cc | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/winsup/cygwin/dlfcn.cc b/winsup/cygwin/dlfcn.cc deleted file mode 100644 index fb3df2c5f..000000000 --- a/winsup/cygwin/dlfcn.cc +++ /dev/null @@ -1,184 +0,0 @@ -/* dlfcn.cc - - Copyright 1998, 2000, 2001, 2002, 2003, 2004, 2008, 2009, 2010 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <psapi.h> -#include <stdlib.h> -#include <ctype.h> -#include "path.h" -#include "perprocess.h" -#include "dlfcn.h" -#include "cygtls.h" -#include "tls_pbuf.h" - -static void __stdcall -set_dl_error (const char *str) -{ - strcpy (_my_tls.locals.dl_buffer, strerror (get_errno ())); - _my_tls.locals.dl_error = 1; -} - -/* Look for an executable file given the name and the environment - variable to use for searching (eg., PATH); returns the full - pathname (static buffer) if found or NULL if not. */ -inline const char * __stdcall -check_path_access (const char *mywinenv, const char *name, path_conv& buf) -{ - return find_exec (name, buf, mywinenv, FE_NNF | FE_NATIVE | FE_CWD | FE_DLL); -} - -/* Search LD_LIBRARY_PATH for dll, if it exists. - Return Windows version of given path. */ -static bool __stdcall -get_full_path_of_dll (const char* str, path_conv &real_filename) -{ - int len = strlen (str); - - /* empty string? */ - if (len == 0) - { - set_errno (EINVAL); - return false; /* Yes. Let caller deal with it. */ - } - - tmp_pathbuf tp; - char *name = tp.c_get (); - - strcpy (name, str); /* Put it somewhere where we can manipulate it. */ - - if (isabspath (name) || - (check_path_access ("LD_LIBRARY_PATH=", name, real_filename) - ?: check_path_access ("/usr/lib", name, real_filename)) == NULL) - real_filename.check (name, PC_SYM_FOLLOW | PC_NOFULL | PC_NULLEMPTY); - - if (!real_filename.error) - return true; - - set_errno (real_filename.error); - return false; -} - -void * -dlopen (const char *name, int) -{ - void *ret; - - if (name == NULL) - ret = (void *) GetModuleHandle (NULL); /* handle for the current module */ - else - { - /* handle for the named library */ - path_conv pc; - if (!get_full_path_of_dll (name, pc)) - ret = NULL; - else - { - tmp_pathbuf tp; - wchar_t *path = tp.w_get (); - - pc.get_wide_win32_path (path); - /* Check if the last path component contains a dot. If so, - leave the filename alone. Otherwise add a traiing dot - to override LoadLibrary's automatic adding of a ".dll" suffix. */ - wchar_t *last_bs = wcsrchr (path, L'\\'); - if (last_bs && !wcschr (last_bs, L'.')) - wcscat (last_bs, L"."); - - /* Workaround for broken DLLs built against Cygwin versions 1.7.0-49 - up to 1.7.0-57. They override the cxx_malloc pointer in their - DLL initialization code even if loaded dynamically. This is a - no-no since a later dlclose lets cxx_malloc point into nirvana. - The below kludge "fixes" that by reverting the original cxx_malloc - pointer after LoadLibrary. This implies that their overrides - won't be applied; that's OK. All overrides should be present at - final link time, as Windows doesn't allow undefined references; - it would actually be wrong for a dlopen'd DLL to opportunistically - override functions in a way that wasn't known then. We're not - going to try and reproduce the full ELF dynamic loader here! */ - - /* Store original cxx_malloc pointer. */ - struct per_process_cxx_malloc *tmp_malloc; - tmp_malloc = __cygwin_user_data.cxx_malloc; - - ret = (void *) LoadLibraryW (path); - - /* Restore original cxx_malloc pointer. */ - __cygwin_user_data.cxx_malloc = tmp_malloc; - - if (ret == NULL) - __seterrno (); - } - } - - if (!ret) - set_dl_error ("dlopen"); - debug_printf ("ret %p", ret); - - return ret; -} - -void * -dlsym (void *handle, const char *name) -{ - void *ret = NULL; - if (handle == RTLD_DEFAULT) - { /* search all modules */ - HANDLE cur_proc = GetCurrentProcess (); - HMODULE *modules; - DWORD needed, i; - if (!EnumProcessModules (cur_proc, NULL, 0, &needed)) - { - dlsym_fail: - set_dl_error ("dlsym"); - return NULL; - } - modules = (HMODULE*) alloca (needed); - if (!EnumProcessModules (cur_proc, modules, needed, &needed)) - goto dlsym_fail; - for (i = 0; i < needed / sizeof (HMODULE); i++) - if ((ret = (void *) GetProcAddress (modules[i], name))) - break; - } - else - ret = (void *) GetProcAddress ((HMODULE)handle, name); - if (!ret) - set_dl_error ("dlsym"); - debug_printf ("ret %p", ret); - return ret; -} - -int -dlclose (void *handle) -{ - int ret; - if (handle == GetModuleHandle (NULL)) - ret = 0; - else if (FreeLibrary ((HMODULE) handle)) - ret = 0; - else - ret = -1; - if (ret) - set_dl_error ("dlclose"); - return ret; -} - -char * -dlerror () -{ - char *res; - if (!_my_tls.locals.dl_error) - res = NULL; - else - { - _my_tls.locals.dl_error = 0; - res = _my_tls.locals.dl_buffer; - } - return res; -} |