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under dramatic changes...

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hyung-hwan
2014-07-02 14:29:01 +00:00
parent 45db0d7198
commit 69558e9e45
90 changed files with 129552 additions and 166 deletions
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158
libltdl/loaders/dld_link.c Normal file
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/* loader-dld_link.c -- dynamic linking with dld
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 dld_link_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_dld_link";
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_DLD_H)
# include <dld.h>
#endif
/* 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)
{
lt_module module = lt__strdup (filename);
if (dld_link (filename) != 0)
{
LT__SETERROR (CANNOT_OPEN);
FREE (module);
}
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 (dld_unlink_by_file ((char*)(module), 1) != 0)
{
LT__SETERROR (CANNOT_CLOSE);
++errors;
}
else
{
FREE (module);
}
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 LT__UNUSED module,
const char *name)
{
void *address = dld_get_func (name);
if (!address)
{
LT__SETERROR (SYMBOL_NOT_FOUND);
}
return address;
}

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libltdl/loaders/dlopen.c Normal file
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/* loader-dlopen.c -- dynamic linking with dlopen/dlsym
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 dlopen_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_dlvtable *) lt__zalloc (sizeof *vtable);
}
if (vtable && !vtable->name)
{
vtable->name = "lt_dlopen";
#if defined(DLSYM_USCORE)
vtable->sym_prefix = "_";
#endif
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_PREPEND;
}
if (vtable && (vtable->dlloader_data != loader_data))
{
LT__SETERROR (INIT_LOADER);
return 0;
}
return vtable;
}
/* --- IMPLEMENTATION --- */
#if defined(HAVE_DLFCN_H)
# include <dlfcn.h>
#endif
#if defined(HAVE_SYS_DL_H)
# include <sys/dl.h>
#endif
/* We may have to define LT_LAZY_OR_NOW in the command line if we
find out it does not work in some platform. */
#if !defined(LT_LAZY_OR_NOW)
# if defined(RTLD_LAZY)
# define LT_LAZY_OR_NOW RTLD_LAZY
# else
# if defined(DL_LAZY)
# define LT_LAZY_OR_NOW DL_LAZY
# endif
# endif /* !RTLD_LAZY */
#endif
#if !defined(LT_LAZY_OR_NOW)
# if defined(RTLD_NOW)
# define LT_LAZY_OR_NOW RTLD_NOW
# else
# if defined(DL_NOW)
# define LT_LAZY_OR_NOW DL_NOW
# endif
# endif /* !RTLD_NOW */
#endif
#if !defined(LT_LAZY_OR_NOW)
# define LT_LAZY_OR_NOW 0
#endif /* !LT_LAZY_OR_NOW */
/* We only support local and global symbols from modules for loaders
that provide such a thing, otherwise the system default is used. */
#if !defined(RTLD_GLOBAL)
# if defined(DL_GLOBAL)
# define RTLD_GLOBAL DL_GLOBAL
# endif
#endif /* !RTLD_GLOBAL */
#if !defined(RTLD_LOCAL)
# if defined(DL_LOCAL)
# define RTLD_LOCAL DL_LOCAL
# endif
#endif /* !RTLD_LOCAL */
#if defined(HAVE_DLERROR)
# define DLERROR(arg) dlerror ()
#else
# define DLERROR(arg) LT__STRERROR (arg)
#endif
#define DL__SETERROR(errorcode) \
LT__SETERRORSTR (DLERROR (errorcode))
/* 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 advise)
{
int module_flags = LT_LAZY_OR_NOW;
lt_module module;
if (advise)
{
#ifdef RTLD_GLOBAL
/* If there is some means of asking for global symbol resolution,
do so. */
if (advise->is_symglobal)
module_flags |= RTLD_GLOBAL;
#else
/* Otherwise, reset that bit so the caller can tell it wasn't
acted on. */
advise->is_symglobal = 0;
#endif
/* And similarly for local only symbol resolution. */
#ifdef RTLD_LOCAL
if (advise->is_symlocal)
module_flags |= RTLD_LOCAL;
#else
advise->is_symlocal = 0;
#endif
}
module = dlopen (filename, module_flags);
if (!module)
{
DL__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 (dlclose (module) != 0)
{
DL__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 = dlsym (module, name);
if (!address)
{
DL__SETERROR (SYMBOL_NOT_FOUND);
}
return address;
}

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libltdl/loaders/dyld.c Normal file
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/* loader-dyld.c -- dynamic linking on darwin and OS X
Copyright (C) 1998, 1999, 2000, 2004, 2006,
2007, 2008 Free Software Foundation, Inc.
Written by Peter O'Gorman, 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 dyld_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_init (lt_user_data loader_data);
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_dyld";
vtable->sym_prefix = "_";
vtable->dlloader_init = vl_init;
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_MACH_O_DYLD_H)
# if !defined(__APPLE_CC__) && !defined(__MWERKS__) && !defined(__private_extern__)
/* Is this correct? Does it still function properly? */
# define __private_extern__ extern
# endif
# include <mach-o/dyld.h>
#endif
#include <mach-o/getsect.h>
/* We have to put some stuff here that isn't in older dyld.h files */
#if !defined(ENUM_DYLD_BOOL)
# define ENUM_DYLD_BOOL
# undef FALSE
# undef TRUE
enum DYLD_BOOL {
FALSE,
TRUE
};
#endif
#if !defined(LC_REQ_DYLD)
# define LC_REQ_DYLD 0x80000000
#endif
#if !defined(LC_LOAD_WEAK_DYLIB)
# define LC_LOAD_WEAK_DYLIB (0x18 | LC_REQ_DYLD)
#endif
#if !defined(NSADDIMAGE_OPTION_NONE)
# define NSADDIMAGE_OPTION_NONE 0x0
#endif
#if !defined(NSADDIMAGE_OPTION_RETURN_ON_ERROR)
# define NSADDIMAGE_OPTION_RETURN_ON_ERROR 0x1
#endif
#if !defined(NSADDIMAGE_OPTION_WITH_SEARCHING)
# define NSADDIMAGE_OPTION_WITH_SEARCHING 0x2
#endif
#if !defined(NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED)
# define NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED 0x4
#endif
#if !defined(NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME)
# define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
#endif
#if !defined(NSLOOKUPSYMBOLINIMAGE_OPTION_BIND)
# define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND 0x0
#endif
#if !defined(NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW)
# define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW 0x1
#endif
#if !defined(NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY)
# define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY 0x2
#endif
#if !defined(NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR)
# define NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR 0x4
#endif
#define LT__SYMLOOKUP_OPTS (NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW \
| NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR)
#if defined(__BIG_ENDIAN__)
# define LT__MAGIC MH_MAGIC
#else
# define LT__MAGIC MH_CIGAM
#endif
#define DYLD__SETMYERROR(errmsg) LT__SETERRORSTR (dylderror (errmsg))
#define DYLD__SETERROR(errcode) DYLD__SETMYERROR (LT__STRERROR (errcode))
typedef struct mach_header mach_header;
typedef struct dylib_command dylib_command;
static const char *dylderror (const char *errmsg);
static const mach_header *lt__nsmodule_get_header (NSModule module);
static const char *lt__header_get_instnam (const mach_header *mh);
static const mach_header *lt__match_loadedlib (const char *name);
static NSSymbol lt__linkedlib_symbol (const char *symname, const mach_header *mh);
static const mach_header *(*lt__addimage) (const char *image_name,
unsigned long options) = 0;
static NSSymbol (*lt__image_symbol) (const mach_header *image,
const char *symbolName,
unsigned long options) = 0;
static enum DYLD_BOOL (*lt__image_symbol_p) (const mach_header *image,
const char *symbolName) = 0;
static enum DYLD_BOOL (*lt__module_export) (NSModule module) = 0;
static int dyld_cannot_close = 0;
/* 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 initialise this loader. */
static int
vl_init (lt_user_data loader_data)
{
int errors = 0;
if (! dyld_cannot_close)
{
if (!_dyld_present ())
{
++errors;
}
else
{
(void) _dyld_func_lookup ("__dyld_NSAddImage",
(unsigned long*) &lt__addimage);
(void) _dyld_func_lookup ("__dyld_NSLookupSymbolInImage",
(unsigned long*)&lt__image_symbol);
(void) _dyld_func_lookup ("__dyld_NSIsSymbolNameDefinedInImage",
(unsigned long*) &lt__image_symbol_p);
(void) _dyld_func_lookup ("__dyld_NSMakePrivateModulePublic",
(unsigned long*) &lt__module_export);
dyld_cannot_close = lt_dladderror ("can't close a dylib");
}
}
return errors;
}
/* 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 loader_data, const char *filename,
lt_dladvise LT__UNUSED advise)
{
lt_module module = 0;
NSObjectFileImage ofi = 0;
if (!filename)
{
return (lt_module) -1;
}
switch (NSCreateObjectFileImageFromFile (filename, &ofi))
{
case NSObjectFileImageSuccess:
module = NSLinkModule (ofi, filename, NSLINKMODULE_OPTION_RETURN_ON_ERROR
| NSLINKMODULE_OPTION_PRIVATE
| NSLINKMODULE_OPTION_BINDNOW);
NSDestroyObjectFileImage (ofi);
if (module)
{
lt__module_export (module);
}
break;
case NSObjectFileImageInappropriateFile:
if (lt__image_symbol_p && lt__image_symbol)
{
module = (lt_module) lt__addimage(filename,
NSADDIMAGE_OPTION_RETURN_ON_ERROR);
}
break;
case NSObjectFileImageFailure:
case NSObjectFileImageArch:
case NSObjectFileImageFormat:
case NSObjectFileImageAccess:
/*NOWORK*/
break;
}
if (!module)
{
DYLD__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 loader_data, lt_module module)
{
int errors = 0;
if (module != (lt_module) -1)
{
const mach_header *mh = (const mach_header *) module;
int flags = 0;
if (mh->magic == LT__MAGIC)
{
lt_dlseterror (dyld_cannot_close);
++errors;
}
else
{
/* Currently, if a module contains c++ static destructors and it
is unloaded, we get a segfault in atexit(), due to compiler and
dynamic loader differences of opinion, this works around that. */
if ((const struct section *) NULL !=
getsectbynamefromheader (lt__nsmodule_get_header (module),
"__DATA", "__mod_term_func"))
{
flags |= NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED;
}
#if defined(__ppc__)
flags |= NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES;
#endif
if (!NSUnLinkModule (module, flags))
{
DYLD__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 loader_data, lt_module module, const char *name)
{
NSSymbol *nssym = 0;
const mach_header *mh = (const mach_header *) module;
char saveError[256] = "Symbol not found";
if (module == (lt_module) -1)
{
void *address, *unused;
_dyld_lookup_and_bind (name, (unsigned long*) &address, &unused);
return address;
}
if (mh->magic == LT__MAGIC)
{
if (lt__image_symbol_p && lt__image_symbol)
{
if (lt__image_symbol_p (mh, name))
{
nssym = lt__image_symbol (mh, name, LT__SYMLOOKUP_OPTS);
}
}
}
else
{
nssym = NSLookupSymbolInModule (module, name);
}
if (!nssym)
{
strncpy (saveError, dylderror (LT__STRERROR (SYMBOL_NOT_FOUND)), 255);
saveError[255] = 0;
if (!mh)
{
mh = (mach_header *)lt__nsmodule_get_header (module);
}
nssym = lt__linkedlib_symbol (name, mh);
}
if (!nssym)
{
LT__SETERRORSTR (saveError);
}
return nssym ? NSAddressOfSymbol (nssym) : 0;
}
/* --- HELPER FUNCTIONS --- */
/* Return the dyld error string, or the passed in error string if none. */
static const char *
dylderror (const char *errmsg)
{
NSLinkEditErrors ler;
int lerno;
const char *file;
const char *errstr;
NSLinkEditError (&ler, &lerno, &file, &errstr);
if (! (errstr && *errstr))
{
errstr = errmsg;
}
return errstr;
}
/* There should probably be an apple dyld api for this. */
static const mach_header *
lt__nsmodule_get_header (NSModule module)
{
int i = _dyld_image_count();
const char *modname = NSNameOfModule (module);
const mach_header *mh = 0;
if (!modname)
return NULL;
while (i > 0)
{
--i;
if (strneq (_dyld_get_image_name (i), modname))
{
mh = _dyld_get_image_header (i);
break;
}
}
return mh;
}
/* NSAddImage is also used to get the loaded image, but it only works if
the lib is installed, for uninstalled libs we need to check the
install_names against each other. Note that this is still broken if
DYLD_IMAGE_SUFFIX is set and a different lib was loaded as a result. */
static const char *
lt__header_get_instnam (const mach_header *mh)
{
unsigned long offset = sizeof(mach_header);
const char* result = 0;
int j;
for (j = 0; j < mh->ncmds; j++)
{
struct load_command *lc;
lc = (struct load_command*) (((unsigned long) mh) + offset);
if (LC_ID_DYLIB == lc->cmd)
{
result=(char*)(((dylib_command*) lc)->dylib.name.offset +
(unsigned long) lc);
}
offset += lc->cmdsize;
}
return result;
}
static const mach_header *
lt__match_loadedlib (const char *name)
{
const mach_header *mh = 0;
int i = _dyld_image_count();
while (i > 0)
{
const char *id;
--i;
id = lt__header_get_instnam (_dyld_get_image_header (i));
if (id && strneq (id, name))
{
mh = _dyld_get_image_header (i);
break;
}
}
return mh;
}
/* Safe to assume our mh is good. */
static NSSymbol
lt__linkedlib_symbol (const char *symname, const mach_header *mh)
{
NSSymbol symbol = 0;
if (lt__image_symbol && NSIsSymbolNameDefined (symname))
{
unsigned long offset = sizeof(mach_header);
struct load_command *lc;
int j;
for (j = 0; j < mh->ncmds; j++)
{
lc = (struct load_command*) (((unsigned long) mh) + offset);
if ((LC_LOAD_DYLIB == lc->cmd) || (LC_LOAD_WEAK_DYLIB == lc->cmd))
{
unsigned long base = ((dylib_command *) lc)->dylib.name.offset;
char *name = (char *) (base + (unsigned long) lc);
const mach_header *mh1 = lt__match_loadedlib (name);
if (!mh1)
{
/* Maybe NSAddImage can find it */
mh1 = lt__addimage (name,
NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
| NSADDIMAGE_OPTION_WITH_SEARCHING
| NSADDIMAGE_OPTION_RETURN_ON_ERROR);
}
if (mh1)
{
symbol = lt__image_symbol (mh1, symname, LT__SYMLOOKUP_OPTS);
if (symbol)
break;
}
}
offset += lc->cmdsize;
}
}
return symbol;
}

167
libltdl/loaders/load_add_on.c Normal file
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/* loader-load_add_on.c -- dynamic linking for BeOS
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 load_add_on_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_load_add_on";
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 --- */
#include <kernel/image.h>
/* 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)
{
image_id image = 0;
if (filename)
{
image = load_add_on (filename);
}
else
{
image_info info;
int32 cookie = 0;
if (get_next_image_info (0, &cookie, &info) == B_OK)
image = load_add_on (info.name);
}
if (image <= 0)
{
LT__SETERROR (CANNOT_OPEN);
image = 0;
}
return (lt_module) image;
}
/* 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 (unload_add_on ((image_id) module) != B_OK)
{
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;
image_id image = (image_id) module;
if (get_image_symbol (image, name, B_SYMBOL_TYPE_ANY, address) != B_OK)
{
LT__SETERROR (SYMBOL_NOT_FOUND);
address = 0;
}
return address;
}

369
libltdl/loaders/loadlibrary.c Normal file
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/* loader-loadlibrary.c -- dynamic linking for Win32
Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006,
2007, 2008, 2010 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"
#if defined(__CYGWIN__)
# include <sys/cygwin.h>
#endif
/* 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 loadlibrary_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_dlinterface_id iface_id = 0;
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_dlvtable *) lt__zalloc (sizeof *vtable);
iface_id = lt_dlinterface_register ("ltdl loadlibrary", NULL);
}
if (vtable && !vtable->name)
{
vtable->name = "lt_loadlibrary";
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 --- */
#include <windows.h>
#define LOCALFREE(mem) LT_STMT_START { \
if (mem) { LocalFree ((void *)mem); mem = NULL; } } LT_STMT_END
#define LOADLIB__SETERROR(errmsg) LT__SETERRORSTR (loadlibraryerror (errmsg))
#define LOADLIB_SETERROR(errcode) LOADLIB__SETERROR (LT__STRERROR (errcode))
static const char *loadlibraryerror (const char *default_errmsg);
static DWORD WINAPI wrap_getthreaderrormode (void);
static DWORD WINAPI fallback_getthreaderrormode (void);
static BOOL WINAPI wrap_setthreaderrormode (DWORD mode, DWORD *oldmode);
static BOOL WINAPI fallback_setthreaderrormode (DWORD mode, DWORD *oldmode);
typedef DWORD (WINAPI getthreaderrormode_type) (void);
typedef BOOL (WINAPI setthreaderrormode_type) (DWORD, DWORD *);
static getthreaderrormode_type *getthreaderrormode = wrap_getthreaderrormode;
static setthreaderrormode_type *setthreaderrormode = wrap_setthreaderrormode;
static char *error_message = 0;
/* 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;
LOCALFREE (error_message);
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)
{
lt_module module = 0;
char *ext;
char wpath[MAX_PATH];
size_t len;
if (!filename)
{
/* Get the name of main module */
*wpath = 0;
GetModuleFileName (NULL, wpath, sizeof (wpath));
filename = wpath;
}
else
{
len = LT_STRLEN (filename);
if (len >= MAX_PATH)
{
LT__SETERROR (CANNOT_OPEN);
return 0;
}
#if HAVE_DECL_CYGWIN_CONV_PATH
if (cygwin_conv_path (CCP_POSIX_TO_WIN_A, filename, wpath, MAX_PATH))
{
LT__SETERROR (CANNOT_OPEN);
return 0;
}
len = 0;
#elif defined(__CYGWIN__)
cygwin_conv_to_full_win32_path (filename, wpath);
len = 0;
#else
strcpy(wpath, filename);
#endif
ext = strrchr (wpath, '.');
if (!ext)
{
/* Append a `.' to stop Windows from adding an
implicit `.dll' extension. */
if (!len)
len = strlen (wpath);
if (len + 1 >= MAX_PATH)
{
LT__SETERROR (CANNOT_OPEN);
return 0;
}
wpath[len] = '.';
wpath[len+1] = '\0';
}
}
{
/* Silence dialog from LoadLibrary on some failures. */
DWORD errormode = getthreaderrormode ();
DWORD last_error;
setthreaderrormode (errormode | SEM_FAILCRITICALERRORS, NULL);
module = LoadLibrary (wpath);
/* Restore the error mode. */
last_error = GetLastError ();
setthreaderrormode (errormode, NULL);
SetLastError (last_error);
}
/* libltdl expects this function to fail if it is unable
to physically load the library. Sadly, LoadLibrary
will search the loaded libraries for a match and return
one of them if the path search load fails.
We check whether LoadLibrary is returning a handle to
an already loaded module, and simulate failure if we
find one. */
{
lt_dlhandle cur = 0;
while ((cur = lt_dlhandle_iterate (iface_id, cur)))
{
if (!cur->module)
{
cur = 0;
break;
}
if (cur->module == module)
{
break;
}
}
if (!module)
LOADLIB_SETERROR (CANNOT_OPEN);
else if (cur)
{
LT__SETERROR (CANNOT_OPEN);
module = 0;
}
}
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 (FreeLibrary ((HMODULE) module) == 0)
{
LOADLIB_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 = (void *) GetProcAddress ((HMODULE) module, name);
if (!address)
{
LOADLIB_SETERROR (SYMBOL_NOT_FOUND);
}
return address;
}
/* --- HELPER FUNCTIONS --- */
/* Return the windows error message, or the passed in error message on
failure. */
static const char *
loadlibraryerror (const char *default_errmsg)
{
size_t len;
LOCALFREE (error_message);
FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError (),
0,
(char *) &error_message,
0, NULL);
/* Remove trailing CRNL */
len = LT_STRLEN (error_message);
if (len && error_message[len - 1] == '\n')
error_message[--len] = LT_EOS_CHAR;
if (len && error_message[len - 1] == '\r')
error_message[--len] = LT_EOS_CHAR;
return len ? error_message : default_errmsg;
}
/* A function called through the getthreaderrormode variable which checks
if the system supports GetThreadErrorMode (or GetErrorMode) and arranges
for it or a fallback implementation to be called directly in the future.
The selected version is then called. */
static DWORD WINAPI
wrap_getthreaderrormode (void)
{
HMODULE kernel32 = GetModuleHandleA ("kernel32.dll");
getthreaderrormode
= (getthreaderrormode_type *) GetProcAddress (kernel32,
"GetThreadErrorMode");
if (!getthreaderrormode)
getthreaderrormode
= (getthreaderrormode_type *) GetProcAddress (kernel32,
"GetErrorMode");
if (!getthreaderrormode)
getthreaderrormode = fallback_getthreaderrormode;
return getthreaderrormode ();
}
/* A function called through the getthreaderrormode variable for cases
where the system does not support GetThreadErrorMode or GetErrorMode */
static DWORD WINAPI
fallback_getthreaderrormode (void)
{
/* Prior to Windows Vista, the only way to get the current error
mode was to set a new one. In our case, we are setting a new
error mode right after "getting" it while ignoring the error
mode in effect when setting the new error mode, so that's
fairly ok. */
return (DWORD) SetErrorMode (SEM_FAILCRITICALERRORS);
}
/* A function called through the setthreaderrormode variable which checks
if the system supports SetThreadErrorMode and arranges for it or a
fallback implementation to be called directly in the future.
The selected version is then called. */
static BOOL WINAPI
wrap_setthreaderrormode (DWORD mode, DWORD *oldmode)
{
HMODULE kernel32 = GetModuleHandleA ("kernel32.dll");
setthreaderrormode
= (setthreaderrormode_type *) GetProcAddress (kernel32,
"SetThreadErrorMode");
if (!setthreaderrormode)
setthreaderrormode = fallback_setthreaderrormode;
return setthreaderrormode (mode, oldmode);
}
/* A function called through the setthreaderrormode variable for cases
where the system does not support SetThreadErrorMode. */
static BOOL WINAPI
fallback_setthreaderrormode (DWORD mode, DWORD *oldmode)
{
/* Prior to Windows 7, there was no way to set the thread local error
mode, so set the process global error mode instead. */
DWORD old = (DWORD) SetErrorMode (mode);
if (oldmode)
*oldmode = old;
return TRUE;
}

375
libltdl/loaders/preopen.c Normal file
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/* loader-preopen.c -- emulate dynamic linking using preloaded_symbols
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 preopen_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_init (lt_user_data loader_data);
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_dlvtable *) lt__zalloc (sizeof *vtable);
}
if (vtable && !vtable->name)
{
vtable->name = "lt_preopen";
vtable->sym_prefix = 0;
vtable->module_open = vm_open;
vtable->module_close = vm_close;
vtable->find_sym = vm_sym;
vtable->dlloader_init = vl_init;
vtable->dlloader_exit = vl_exit;
vtable->dlloader_data = loader_data;
vtable->priority = LT_DLLOADER_PREPEND;
}
if (vtable && (vtable->dlloader_data != loader_data))
{
LT__SETERROR (INIT_LOADER);
return 0;
}
return vtable;
}
/* --- IMPLEMENTATION --- */
/* Wrapper type to chain together symbol lists of various origins. */
typedef struct symlist_chain
{
struct symlist_chain *next;
const lt_dlsymlist *symlist;
} symlist_chain;
static int add_symlist (const lt_dlsymlist *symlist);
static int free_symlists (void);
/* The start of the symbol lists chain. */
static symlist_chain *preloaded_symlists = 0;
/* A symbol list preloaded before lt_init() was called. */
static const lt_dlsymlist *default_preloaded_symbols = 0;
/* A function called through the vtable to initialise this loader. */
static int
vl_init (lt_user_data LT__UNUSED loader_data)
{
int errors = 0;
preloaded_symlists = 0;
if (default_preloaded_symbols)
{
errors = lt_dlpreload (default_preloaded_symbols);
}
return errors;
}
/* 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;
free_symlists ();
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)
{
symlist_chain *lists;
lt_module module = 0;
if (!preloaded_symlists)
{
LT__SETERROR (NO_SYMBOLS);
goto done;
}
/* Can't use NULL as the reflective symbol header, as NULL is
used to mark the end of the entire symbol list. Self-dlpreopened
symbols follow this magic number, chosen to be an unlikely
clash with a real module name. */
if (!filename)
{
filename = "@PROGRAM@";
}
for (lists = preloaded_symlists; lists; lists = lists->next)
{
const lt_dlsymlist *symbol;
for (symbol= lists->symlist; symbol->name; ++symbol)
{
if (!symbol->address && streq (symbol->name, filename))
{
/* If the next symbol's name and address is 0, it means
the module just contains the originator and no symbols.
In this case we pretend that we never saw the module and
hope that some other loader will be able to load the module
and have access to its symbols */
const lt_dlsymlist *next_symbol = symbol +1;
if (next_symbol->address && next_symbol->name)
{
module = (lt_module) lists->symlist;
goto done;
}
}
}
}
LT__SETERROR (FILE_NOT_FOUND);
done:
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 LT__UNUSED module)
{
/* Just to silence gcc -Wall */
module = 0;
return 0;
}
/* 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)
{
lt_dlsymlist *symbol = (lt_dlsymlist*) module;
symbol +=2; /* Skip header (originator then libname). */
while (symbol->name)
{
if (streq (symbol->name, name))
{
return symbol->address;
}
++symbol;
}
LT__SETERROR (SYMBOL_NOT_FOUND);
return 0;
}
/* --- HELPER FUNCTIONS --- */
/* The symbol lists themselves are not allocated from the heap, but
we can unhook them and free up the chain of links between them. */
static int
free_symlists (void)
{
symlist_chain *lists;
lists = preloaded_symlists;
while (lists)
{
symlist_chain *next = lists->next;
FREE (lists);
lists = next;
}
preloaded_symlists = 0;
return 0;
}
/* Add a new symbol list to the global chain. */
static int
add_symlist (const lt_dlsymlist *symlist)
{
symlist_chain *lists;
int errors = 0;
/* Search for duplicate entries: */
for (lists = preloaded_symlists;
lists && lists->symlist != symlist; lists = lists->next)
/*NOWORK*/;
/* Don't add the same list twice: */
if (!lists)
{
symlist_chain *tmp = (symlist_chain *) lt__zalloc (sizeof *tmp);
if (tmp)
{
tmp->symlist = symlist;
tmp->next = preloaded_symlists;
preloaded_symlists = tmp;
}
else
{
++errors;
}
}
return errors;
}
/* --- PRELOADING API CALL IMPLEMENTATIONS --- */
/* Save a default symbol list for later. */
int
lt_dlpreload_default (const lt_dlsymlist *preloaded)
{
default_preloaded_symbols = preloaded;
return 0;
}
/* Add a symbol list to the global chain, or with a NULL argument,
revert to just the default list. */
int
lt_dlpreload (const lt_dlsymlist *preloaded)
{
int errors = 0;
if (preloaded)
{
errors = add_symlist (preloaded);
}
else
{
free_symlists();
if (default_preloaded_symbols)
{
errors = lt_dlpreload (default_preloaded_symbols);
}
}
return errors;
}
/* Open all the preloaded modules from the named originator, executing
a callback for each one. If ORIGINATOR is NULL, then call FUNC for
each preloaded module from the program itself. */
int
lt_dlpreload_open (const char *originator, lt_dlpreload_callback_func *func)
{
symlist_chain *list;
int errors = 0;
int found = 0;
/* For each symlist in the chain... */
for (list = preloaded_symlists; list; list = list->next)
{
/* ...that was preloaded by the requesting ORIGINATOR... */
if ((originator && streq (list->symlist->name, originator))
|| (!originator && streq (list->symlist->name, "@PROGRAM@")))
{
const lt_dlsymlist *symbol;
unsigned int idx = 0;
++found;
/* ...load the symbols per source compilation unit:
(we preincrement the index to skip over the originator entry) */
while ((symbol = &list->symlist[++idx])->name != 0)
{
if ((symbol->address == 0)
&& (strneq (symbol->name, "@PROGRAM@")))
{
lt_dlhandle handle = lt_dlopen (symbol->name);
if (handle == 0)
{
++errors;
}
else
{
errors += (*func) (handle);
}
}
}
}
}
if (!found)
{
LT__SETERROR(CANNOT_OPEN);
++errors;
}
return errors;
}

222
libltdl/loaders/shl_load.c Normal file
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@ -0,0 +1,222 @@
/* 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;
}