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Diffstat (limited to 'libltdl/loaders/shl_load.c')
| -rw-r--r-- | libltdl/loaders/shl_load.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/libltdl/loaders/shl_load.c b/libltdl/loaders/shl_load.c deleted file mode 100644 index 5a09d87..0000000 --- a/libltdl/loaders/shl_load.c +++ /dev/null @@ -1,222 +0,0 @@ -/* loader-shl_load.c -- dynamic linking with shl_load (HP-UX) - - Copyright (C) 1998, 1999, 2000, 2004, 2006, - 2007, 2008 Free Software Foundation, Inc. - Written by Thomas Tanner, 1998 - - NOTE: The canonical source of this file is maintained with the - GNU Libtool package. Report bugs to bug-libtool@gnu.org. - -GNU Libltdl 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 of the License, or (at your option) any later version. - -As a special exception to the GNU Lesser General Public License, -if you distribute this file as part of a program or library that -is built using GNU Libtool, you may include this file under the -same distribution terms that you use for the rest of that program. - -GNU Libltdl 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 GNU Libltdl; see the file COPYING.LIB. If not, a -copy can be downloaded from http://www.gnu.org/licenses/lgpl.html, -or obtained by writing to the Free Software Foundation, Inc., -51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. -*/ - -#include "lt__private.h" -#include "lt_dlloader.h" - -/* Use the preprocessor to rename non-static symbols to avoid namespace - collisions when the loader code is statically linked into libltdl. - Use the "<module_name>_LTX_" prefix so that the symbol addresses can - be fetched from the preloaded symbol list by lt_dlsym(): */ -#define get_vtable shl_load_LTX_get_vtable - -LT_BEGIN_C_DECLS -LT_SCOPE lt_dlvtable *get_vtable (lt_user_data loader_data); -LT_END_C_DECLS - - -/* Boilerplate code to set up the vtable for hooking this loader into - libltdl's loader list: */ -static int vl_exit (lt_user_data loader_data); -static lt_module vm_open (lt_user_data loader_data, const char *filename, - lt_dladvise advise); -static int vm_close (lt_user_data loader_data, lt_module module); -static void * vm_sym (lt_user_data loader_data, lt_module module, - const char *symbolname); - -static lt_dlvtable *vtable = 0; - -/* Return the vtable for this loader, only the name and sym_prefix - attributes (plus the virtual function implementations, obviously) - change between loaders. */ -lt_dlvtable * -get_vtable (lt_user_data loader_data) -{ - if (!vtable) - { - vtable = lt__zalloc (sizeof *vtable); - } - - if (vtable && !vtable->name) - { - vtable->name = "lt_shl_load"; - vtable->module_open = vm_open; - vtable->module_close = vm_close; - vtable->find_sym = vm_sym; - vtable->dlloader_exit = vl_exit; - vtable->dlloader_data = loader_data; - vtable->priority = LT_DLLOADER_APPEND; - } - - if (vtable && (vtable->dlloader_data != loader_data)) - { - LT__SETERROR (INIT_LOADER); - return 0; - } - - return vtable; -} - - - -/* --- IMPLEMENTATION --- */ - - -#if defined(HAVE_DL_H) -# include <dl.h> -#endif - -/* some flags are missing on some systems, so we provide - * harmless defaults. - * - * Mandatory: - * BIND_IMMEDIATE - Resolve symbol references when the library is loaded. - * BIND_DEFERRED - Delay code symbol resolution until actual reference. - * - * Optionally: - * BIND_FIRST - Place the library at the head of the symbol search - * order. - * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all - * unsatisfied symbols as fatal. This flag allows - * binding of unsatisfied code symbols to be deferred - * until use. - * [Perl: For certain libraries, like DCE, deferred - * binding often causes run time problems. Adding - * BIND_NONFATAL to BIND_IMMEDIATE still allows - * unresolved references in situations like this.] - * BIND_NOSTART - Do not call the initializer for the shared library - * when the library is loaded, nor on a future call to - * shl_unload(). - * BIND_VERBOSE - Print verbose messages concerning possible - * unsatisfied symbols. - * - * hp9000s700/hp9000s800: - * BIND_RESTRICTED - Restrict symbols visible by the library to those - * present at library load time. - * DYNAMIC_PATH - Allow the loader to dynamically search for the - * library specified by the path argument. - */ - -#if !defined(DYNAMIC_PATH) -# define DYNAMIC_PATH 0 -#endif -#if !defined(BIND_RESTRICTED) -# define BIND_RESTRICTED 0 -#endif - -#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) - - -/* A function called through the vtable when this loader is no - longer needed by the application. */ -static int -vl_exit (lt_user_data LT__UNUSED loader_data) -{ - vtable = NULL; - return 0; -} - -/* A function called through the vtable to open a module with this - loader. Returns an opaque representation of the newly opened - module for processing with this loader's other vtable functions. */ -static lt_module -vm_open (lt_user_data LT__UNUSED loader_data, const char *filename, - lt_dladvise LT__UNUSED advise) -{ - static shl_t self = (shl_t) 0; - lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L); - - /* Since searching for a symbol against a NULL module handle will also - look in everything else that was already loaded and exported with - the -E compiler flag, we always cache a handle saved before any - modules are loaded. */ - if (!self) - { - void *address; - shl_findsym (&self, "main", TYPE_UNDEFINED, &address); - } - - if (!filename) - { - module = self; - } - else - { - module = shl_load (filename, LT_BIND_FLAGS, 0L); - - if (!module) - { - LT__SETERROR (CANNOT_OPEN); - } - } - - return module; -} - -/* A function called through the vtable when a particular module - should be unloaded. */ -static int -vm_close (lt_user_data LT__UNUSED loader_data, lt_module module) -{ - int errors = 0; - - if (module && (shl_unload ((shl_t) (module)) != 0)) - { - LT__SETERROR (CANNOT_CLOSE); - ++errors; - } - - return errors; -} - - -/* A function called through the vtable to get the address of - a symbol loaded from a particular module. */ -static void * -vm_sym (lt_user_data LT__UNUSED loader_data, lt_module module, const char *name) -{ - void *address = 0; - - /* sys_shl_open should never return a NULL module handle */ - if (module == (lt_module) 0) - { - LT__SETERROR (INVALID_HANDLE); - } - else if (!shl_findsym((shl_t*) &module, name, TYPE_UNDEFINED, &address)) - { - if (!address) - { - LT__SETERROR (SYMBOL_NOT_FOUND); - } - } - - return address; -} |