ircd-hybrid/src/dynlink.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  dynlink.c: A module loader.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 * $Id$
 *
 */
#include "stdinc.h"
#include "modules.h"
#include "client.h"
#include "send.h"

#ifndef RTLD_NOW
#define RTLD_NOW RTLD_LAZY /* openbsd deficiency */
#endif

extern dlink_list mod_list;

static char unknown_ver[] = "<unknown>";

/* This file contains the core functions to use dynamic libraries.
 * -TimeMr14C
 */

#if !defined(HAVE_SHL_LOAD) && !defined(HAVE_DLFUNC)
/*
 * Fake dlfunc(3) if we don't have it, cause it's happy.
 */
typedef void (*__function_p)(void);

static __function_p
dlfunc(void *myHandle, const char *functionName)
{
  /* XXX This is not guaranteed to work, but with
   * traditional dl*(3), it is the best we can do.
   * -jmallett
   */
  void *symbolp;

  symbolp = dlsym(myHandle, functionName);
  return((__function_p)(uintptr_t)symbolp);
}
#endif

#ifdef _WIN32
/*
 * jmallett's dl*(3) stubs for DLL management.
 */

char *
dlerror(void)
{
  static char errbuf[IRCD_BUFSIZE];

  FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);

  return errbuf;
}

void *
dlopen(char *filename, int unused)
{
  return LoadLibrary(filename);
}

int
dlclose(void *module)
{
  return FreeLibrary((HMODULE) module) ? 0 : -1;
}

void *
dlsym(void *module, char *sym)
{
  return GetProcAddress((HMODULE) module, sym);
}
#endif

#ifdef HAVE_MACH_O_DYLD_H
/*
** jmallett's dl*(3) shims for NSModule(3) systems.
*/
#include <mach-o/dyld.h>

#ifndef HAVE_DLOPEN
#ifndef RTLD_LAZY
#define RTLD_LAZY 2185 /* built-in dl*(3) don't care */
#endif

void undefinedErrorHandler(const char *);
NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule);
void linkEditErrorHandler(NSLinkEditErrors, int, const char *, const char *);
char *dlerror(void);
void *dlopen(char *, int);
int dlclose(void *);
void *dlsym(void *, char *);

static int firstLoad = TRUE;
static int myDlError;
static const char *myErrorTable[] =
{
  "Loading file as object failed\n",
  "Loading file as object succeeded\n",
  "Not a valid shared object\n",
  "Architecture of object invalid on this architecture\n",
  "Invalid or corrupt image\n",
  "Could not access object\n",
  "NSCreateObjectFileImageFromFile failed\n",
  NULL
};

void
undefinedErrorHandler(const char *symbolName)
{
  sendto_realops_flags(UMODE_ALL, L_ALL, "Undefined symbol: %s", symbolName);
  ilog(L_WARN, "Undefined symbol: %s", symbolName);
}

NSModule
multipleErrorHandler(NSSymbol s, NSModule old, NSModule new)
{
  /* XXX
  ** This results in substantial leaking of memory... Should free one
  ** module, maybe?
  */
  sendto_realops_flags(UMODE_ALL, L_ALL, "Symbol `%s' found in `%s' and `%s'",
                       NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
  ilog(L_WARN, "Symbol `%s' found in `%s' and `%s'", NSNameOfSymbol(s),
       NSNameOfModule(old), NSNameOfModule(new));
  /* We return which module should be considered valid, I believe */
  return new;
}

void
linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum,
                     const char *fileName, const char *errorString)
{
  sendto_realops_flags(UMODE_ALL, L_ALL, "Link editor error: %s for %s",
                       errorString, fileName);
  ilog(L_WARN, "Link editor error: %s for %s", errorString, fileName);
  return;
}

char *
dlerror(void)
{
  return(myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]);
}

void *
dlopen(char *filename, int unused)
{
  NSObjectFileImage myImage;
  NSModule myModule;

  if (firstLoad)
  {
    /* If we are loading our first symbol (huzzah!) we should go ahead
     * and install link editor error handling!
     */
    NSLinkEditErrorHandlers linkEditorErrorHandlers;

    linkEditorErrorHandlers.undefined = undefinedErrorHandler;
    linkEditorErrorHandlers.multiple  = multipleErrorHandler;
    linkEditorErrorHandlers.linkEdit  = linkEditErrorHandler;
    NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
    firstLoad = FALSE;
  }

  myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);

  if (myDlError != NSObjectFileImageSuccess)
    return(NULL);

  myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
  return((void *)myModule);
}

int
dlclose(void *myModule)
{
  NSUnLinkModule(myModule, FALSE);
  return(0);
}

void *
dlsym(void *myModule, char *mySymbolName)
{
  NSSymbol mySymbol;

  mySymbol = NSLookupSymbolInModule((NSModule)myModule, mySymbolName);
  return NSAddressOfSymbol(mySymbol);
}
#endif
#endif

/* unload_one_module()
 *
 * inputs       - name of module to unload
 *              - 1 to say modules unloaded, 0 to not
 * output       - 0 if successful, -1 if error
 * side effects - module is unloaded
 */
int
unload_one_module(char *name, int warn)
{
  dlink_node *ptr = NULL;
  struct module *modp = NULL;

  if ((ptr = findmodule_byname(name)) == NULL) 
    return -1;

  modp = ptr->data;

  if (modp->modremove)
    (*modp->modremove)();

#ifdef HAVE_SHL_LOAD
    /* shl_* and friends have a slightly different format than dl*. But it does not
     * require creation of a totally new modules.c, instead proper usage of
     * defines solve this case. -TimeMr14C
     */
  shl_unload((shl_t) & (modp->handle));
#else
  /* We use FreeBSD's dlfunc(3) interface, or fake it as we
   * used to here if it isn't there.  The interface should
   * be standardised some day, and so it eventually will be
   * providing something guaranteed to do the right thing here.
   *          -jmallett
   */
  dlclose(modp->handle);
#endif
  assert(dlink_list_length(&mod_list) > 0);
  dlinkDelete(ptr, &mod_list);
  MyFree(modp->name);
  MyFree(modp);

  if (warn == 1)
  {
    ilog(L_INFO, "Module %s unloaded", name);
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
  }

  return 0;
}

/* load_a_module()
 *
 * inputs       - path name of module, int to notice, int of core
 * output       - -1 if error 0 if success
 * side effects - loads a module if successful
 */
int
load_a_module(char *path, int warn, int core)
{
#ifdef HAVE_DLINFO
  Link_map *map;
#endif
#ifdef HAVE_SHL_LOAD
  shl_t tmpptr;
#else
  void *tmpptr = NULL;
#endif
  void *addr = NULL;
  char *mod_basename;
  void (*initfunc)(void) = NULL;
  void (*mod_deinit)(void) = NULL;
  char **verp;
  char *ver;
  struct module *modp;

  mod_basename = basename(path);

  if (findmodule_byname(mod_basename) != NULL)
    return(1);

#ifdef HAVE_SHL_LOAD
  tmpptr = shl_load(path, BIND_IMMEDIATE, NULL);
#else
  tmpptr = dlopen(path, RTLD_NOW);
#endif

  if (tmpptr == NULL)
  {
#ifdef HAVE_SHL_LOAD
    const char *err = strerror(errno);
#else
    const char *err = dlerror();
#endif
    sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
                         mod_basename, err);
    ilog(L_WARN, "Error loading module %s: %s", mod_basename, err);
    
    return(-1);
  }

#ifdef HAVE_SHL_LOAD
  if (shl_findsym(&tmpptr, "_modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
  {
    if (shl_findsym(&tmpptr, "__modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
    {
      ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
      sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
                           mod_basename);
      shl_unload(tmpptr);
      return(-1);
    }
  }

  if (shl_findsym(&tmpptr, "_moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
  {
    if (shl_findsym(&tmpptr, "__moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
    {
      ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
      sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
                           mod_basename);
      /* this is a soft error.  we're allowed not to have one, i guess.
       * (judging by the code in unload_one_module() */
      mod_deinit = NULL;
    }
  }

  if (shl_findsym(&tmpptr, "_version", TYPE_UNDEFINED, &verp) == -1)
  {
    if (shl_findsym(&tmpptr, "__version", TYPE_UNDEFINED, &verp) == -1)
      ver = unknown_ver;
    else
      ver = *verp;
  }
  else
    ver = *verp;
#else
  if ((initfunc = (void(*)(void))dlfunc(tmpptr, "_modinit")) == NULL &&
      /* Only for compatibility, because some systems have underscore
       * prepended symbol names */
      (initfunc = (void(*)(void))dlfunc(tmpptr, "__modinit")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
                         mod_basename);
    ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
    dlclose(tmpptr);
    return(-1);
  }

  mod_deinit = (void(*)(void))dlfunc(tmpptr, "_moddeinit");

  if (mod_deinit == NULL && (mod_deinit = (void(*)(void))dlfunc(tmpptr, "__moddeinit")) == NULL)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
                         mod_basename);
    ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
    /* blah blah soft error, see above. */
    mod_deinit = NULL;
  }

  verp = (char **)dlsym(tmpptr, "_version");

  if (verp == NULL && (verp = (char **)dlsym(tmpptr, "__version")) == NULL)
    ver = unknown_ver;
  else
    ver = *verp;
#endif

  
  modp            = MyMalloc(sizeof(struct module));
#ifdef HAVE_DLINFO
  dlinfo(tmpptr, RTLD_DI_LINKMAP, &map);
  if (map != NULL)
    addr = map->l_addr;
  else
    addr = tmpptr;
#endif

  modp->handle    = tmpptr;
  modp->address   = addr;
  modp->version   = ver;
  modp->core      = core;
  modp->modremove = mod_deinit;

  DupString(modp->name, mod_basename);
  dlinkAdd(modp, &modp->node, &mod_list);

  initfunc();

  if (warn == 1)
  {
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "Module %s [version: %s] loaded at %p",
                         mod_basename, ver, addr);
    ilog(L_WARN, "Module %s [version: %s] loaded at %p",
         mod_basename, ver, addr);
  }

  return(0);
}
Revision:	186
Committed:	Sun Oct 23 16:05:01 2005 UTC (20 years, 9 months ago) by db
Content type:	text/x-csrc
File size:	10779 byte(s)
Log Message:	- Q. When is an address not an address? A. When it is a handle! Keep track of handle address and base address of loaded module separately. The address is also used for modlist and could be derived in modlist from handle, but later.
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* dynlink.c: A module loader.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*
24			*/
25			#include "stdinc.h"
26			#include "modules.h"
27			#include "client.h"
28			#include "send.h"
29
30			#ifndef RTLD_NOW
31			#define RTLD_NOW RTLD_LAZY /* openbsd deficiency */
32			#endif
33
34			extern dlink_list mod_list;
35
36			static char unknown_ver[] = "<unknown>";
37
38			/* This file contains the core functions to use dynamic libraries.
39			* -TimeMr14C
40			*/
41
42			#if !defined(HAVE_SHL_LOAD) && !defined(HAVE_DLFUNC)
43			/*
44			* Fake dlfunc(3) if we don't have it, cause it's happy.
45			*/
46			typedef void (*__function_p)(void);
47
48			static __function_p
49			dlfunc(void myHandle, const char functionName)
50			{
51			/* XXX This is not guaranteed to work, but with
52			* traditional dl*(3), it is the best we can do.
53			* -jmallett
54			*/
55			void *symbolp;
56
57			symbolp = dlsym(myHandle, functionName);
58			return((__function_p)(uintptr_t)symbolp);
59			}
60			#endif
61
62	adx	185	#ifdef _WIN32
63			/*
64			* jmallett's dl*(3) stubs for DLL management.
65			*/
66
67			char *
68			dlerror(void)
69			{
70			static char errbuf[IRCD_BUFSIZE];
71
72			FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
73			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, sizeof(errbuf), NULL);
74
75			return errbuf;
76			}
77
78			void *
79			dlopen(char *filename, int unused)
80			{
81			return LoadLibrary(filename);
82			}
83
84			int
85			dlclose(void *module)
86			{
87			return FreeLibrary((HMODULE) module) ? 0 : -1;
88			}
89
90			void *
91			dlsym(void module, char sym)
92			{
93			return GetProcAddress((HMODULE) module, sym);
94			}
95			#endif
96
97	adx	30	#ifdef HAVE_MACH_O_DYLD_H
98			/*
99			** jmallett's dl*(3) shims for NSModule(3) systems.
100			*/
101			#include <mach-o/dyld.h>
102
103			#ifndef HAVE_DLOPEN
104			#ifndef RTLD_LAZY
105			#define RTLD_LAZY 2185 /* built-in dl(3) don't care /
106			#endif
107
108			void undefinedErrorHandler(const char *);
109			NSModule multipleErrorHandler(NSSymbol, NSModule, NSModule);
110			void linkEditErrorHandler(NSLinkEditErrors, int, const char , const char );
111			char *dlerror(void);
112			void dlopen(char , int);
113			int dlclose(void *);
114			void dlsym(void , char *);
115
116			static int firstLoad = TRUE;
117			static int myDlError;
118			static const char *myErrorTable[] =
119			{
120			"Loading file as object failed\n",
121			"Loading file as object succeeded\n",
122			"Not a valid shared object\n",
123			"Architecture of object invalid on this architecture\n",
124			"Invalid or corrupt image\n",
125			"Could not access object\n",
126			"NSCreateObjectFileImageFromFile failed\n",
127			NULL
128			};
129
130			void
131			undefinedErrorHandler(const char *symbolName)
132			{
133			sendto_realops_flags(UMODE_ALL, L_ALL, "Undefined symbol: %s", symbolName);
134			ilog(L_WARN, "Undefined symbol: %s", symbolName);
135			}
136
137			NSModule
138			multipleErrorHandler(NSSymbol s, NSModule old, NSModule new)
139			{
140			/* XXX
141			** This results in substantial leaking of memory... Should free one
142			** module, maybe?
143			*/
144			sendto_realops_flags(UMODE_ALL, L_ALL, "Symbol `%s' found in `%s' and `%s'",
145			NSNameOfSymbol(s), NSNameOfModule(old), NSNameOfModule(new));
146			ilog(L_WARN, "Symbol `%s' found in `%s' and `%s'", NSNameOfSymbol(s),
147			NSNameOfModule(old), NSNameOfModule(new));
148			/* We return which module should be considered valid, I believe */
149	adx	185	return new;
150	adx	30	}
151
152			void
153			linkEditErrorHandler(NSLinkEditErrors errorClass, int errnum,
154			const char fileName, const char errorString)
155			{
156			sendto_realops_flags(UMODE_ALL, L_ALL, "Link editor error: %s for %s",
157			errorString, fileName);
158			ilog(L_WARN, "Link editor error: %s for %s", errorString, fileName);
159			return;
160			}
161
162			char *
163			dlerror(void)
164			{
165			return(myDlError == NSObjectFileImageSuccess ? NULL : myErrorTable[myDlError % 7]);
166			}
167
168			void *
169			dlopen(char *filename, int unused)
170			{
171			NSObjectFileImage myImage;
172			NSModule myModule;
173
174			if (firstLoad)
175			{
176			/* If we are loading our first symbol (huzzah!) we should go ahead
177			* and install link editor error handling!
178			*/
179			NSLinkEditErrorHandlers linkEditorErrorHandlers;
180
181			linkEditorErrorHandlers.undefined = undefinedErrorHandler;
182			linkEditorErrorHandlers.multiple = multipleErrorHandler;
183			linkEditorErrorHandlers.linkEdit = linkEditErrorHandler;
184			NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
185			firstLoad = FALSE;
186			}
187
188			myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);
189
190			if (myDlError != NSObjectFileImageSuccess)
191			return(NULL);
192
193			myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
194			return((void *)myModule);
195			}
196
197			int
198			dlclose(void *myModule)
199			{
200			NSUnLinkModule(myModule, FALSE);
201			return(0);
202			}
203
204			void *
205			dlsym(void myModule, char mySymbolName)
206			{
207			NSSymbol mySymbol;
208
209			mySymbol = NSLookupSymbolInModule((NSModule)myModule, mySymbolName);
210			return NSAddressOfSymbol(mySymbol);
211			}
212			#endif
213			#endif
214
215			/* unload_one_module()
216			*
217			* inputs - name of module to unload
218			* - 1 to say modules unloaded, 0 to not
219			* output - 0 if successful, -1 if error
220			* side effects - module is unloaded
221			*/
222			int
223			unload_one_module(char *name, int warn)
224			{
225			dlink_node *ptr = NULL;
226			struct module *modp = NULL;
227
228			if ((ptr = findmodule_byname(name)) == NULL)
229			return -1;
230
231			modp = ptr->data;
232
233			if (modp->modremove)
234			(*modp->modremove)();
235
236			#ifdef HAVE_SHL_LOAD
237			/* shl_* and friends have a slightly different format than dl*. But it does not
238			* require creation of a totally new modules.c, instead proper usage of
239			* defines solve this case. -TimeMr14C
240			*/
241	db	186	shl_unload((shl_t) & (modp->handle));
242	adx	30	#else
243			/* We use FreeBSD's dlfunc(3) interface, or fake it as we
244			* used to here if it isn't there. The interface should
245			* be standardised some day, and so it eventually will be
246			* providing something guaranteed to do the right thing here.
247			* -jmallett
248			*/
249	db	186	dlclose(modp->handle);
250	adx	30	#endif
251			assert(dlink_list_length(&mod_list) > 0);
252			dlinkDelete(ptr, &mod_list);
253			MyFree(modp->name);
254			MyFree(modp);
255
256			if (warn == 1)
257			{
258			ilog(L_INFO, "Module %s unloaded", name);
259			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s unloaded", name);
260			}
261
262			return 0;
263			}
264
265			/* load_a_module()
266			*
267			* inputs - path name of module, int to notice, int of core
268			* output - -1 if error 0 if success
269			* side effects - loads a module if successful
270			*/
271			int
272			load_a_module(char *path, int warn, int core)
273			{
274	db	165	#ifdef HAVE_DLINFO
275	db	164	Link_map *map;
276			#endif
277	adx	30	#ifdef HAVE_SHL_LOAD
278			shl_t tmpptr;
279			#else
280			void *tmpptr = NULL;
281			#endif
282	db	165	void *addr = NULL;
283	adx	30	char *mod_basename;
284			void (*initfunc)(void) = NULL;
285			void (*mod_deinit)(void) = NULL;
286			char **verp;
287			char *ver;
288			struct module *modp;
289
290			mod_basename = basename(path);
291
292			if (findmodule_byname(mod_basename) != NULL)
293			return(1);
294
295			#ifdef HAVE_SHL_LOAD
296			tmpptr = shl_load(path, BIND_IMMEDIATE, NULL);
297			#else
298			tmpptr = dlopen(path, RTLD_NOW);
299			#endif
300
301			if (tmpptr == NULL)
302			{
303			#ifdef HAVE_SHL_LOAD
304			const char *err = strerror(errno);
305			#else
306			const char *err = dlerror();
307			#endif
308			sendto_realops_flags(UMODE_ALL, L_ALL, "Error loading module %s: %s",
309			mod_basename, err);
310			ilog(L_WARN, "Error loading module %s: %s", mod_basename, err);
311
312			return(-1);
313			}
314
315			#ifdef HAVE_SHL_LOAD
316			if (shl_findsym(&tmpptr, "_modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
317			{
318			if (shl_findsym(&tmpptr, "__modinit", TYPE_UNDEFINED, (void *)&initfunc) == -1)
319			{
320			ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
321			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
322			mod_basename);
323			shl_unload(tmpptr);
324			return(-1);
325			}
326			}
327
328			if (shl_findsym(&tmpptr, "_moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
329			{
330			if (shl_findsym(&tmpptr, "__moddeinit", TYPE_UNDEFINED, (void *)&mod_deinit) == -1)
331			{
332			ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
333			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
334			mod_basename);
335			/* this is a soft error. we're allowed not to have one, i guess.
336			* (judging by the code in unload_one_module() */
337			mod_deinit = NULL;
338			}
339			}
340
341			if (shl_findsym(&tmpptr, "_version", TYPE_UNDEFINED, &verp) == -1)
342			{
343			if (shl_findsym(&tmpptr, "__version", TYPE_UNDEFINED, &verp) == -1)
344			ver = unknown_ver;
345			else
346			ver = *verp;
347			}
348			else
349			ver = *verp;
350			#else
351			if ((initfunc = (void(*)(void))dlfunc(tmpptr, "_modinit")) == NULL &&
352			/* Only for compatibility, because some systems have underscore
353			* prepended symbol names */
354			(initfunc = (void(*)(void))dlfunc(tmpptr, "__modinit")) == NULL)
355			{
356			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _modinit() function",
357			mod_basename);
358			ilog(L_WARN, "Module %s has no _modinit() function", mod_basename);
359			dlclose(tmpptr);
360			return(-1);
361			}
362
363			mod_deinit = (void(*)(void))dlfunc(tmpptr, "_moddeinit");
364
365			if (mod_deinit == NULL && (mod_deinit = (void(*)(void))dlfunc(tmpptr, "__moddeinit")) == NULL)
366			{
367			sendto_realops_flags(UMODE_ALL, L_ALL, "Module %s has no _moddeinit() function",
368			mod_basename);
369			ilog(L_WARN, "Module %s has no _moddeinit() function", mod_basename);
370			/* blah blah soft error, see above. */
371			mod_deinit = NULL;
372			}
373
374			verp = (char **)dlsym(tmpptr, "_version");
375
376			if (verp == NULL && (verp = (char **)dlsym(tmpptr, "__version")) == NULL)
377			ver = unknown_ver;
378			else
379			ver = *verp;
380			#endif
381
382	db	164
383	adx	30	modp = MyMalloc(sizeof(struct module));
384	db	165	#ifdef HAVE_DLINFO
385	db	164	dlinfo(tmpptr, RTLD_DI_LINKMAP, &map);
386			if (map != NULL)
387	db	165	addr = map->l_addr;
388	db	164	else
389	db	165	addr = tmpptr;
390	db	164	#endif
391	db	165
392	db	186	modp->handle = tmpptr;
393	db	165	modp->address = addr;
394	adx	30	modp->version = ver;
395			modp->core = core;
396			modp->modremove = mod_deinit;
397
398			DupString(modp->name, mod_basename);
399			dlinkAdd(modp, &modp->node, &mod_list);
400
401			initfunc();
402
403			if (warn == 1)
404			{
405			sendto_realops_flags(UMODE_ALL, L_ALL,
406			"Module %s [version: %s] loaded at %p",
407	db	165	mod_basename, ver, addr);
408	adx	30	ilog(L_WARN, "Module %s [version: %s] loaded at %p",
409	db	165	mod_basename, ver, addr);
410	adx	30	}
411
412			return(0);
413			}