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sdiff udiff text old ( 59603 ) new ( 59751 )
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kern_linker.c (59603) kern_linker.c (59751)
1/*-
2 * Copyright (c) 1997-2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 9 unchanged lines hidden (view full) ---

18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
1/*-
2 * Copyright (c) 1997-2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 9 unchanged lines hidden (view full) ---

18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/kern/kern_linker.c 59603 2000-04-24 17:08:04Z dfr $
26 * $FreeBSD: head/sys/kern/kern_linker.c 59751 2000-04-29 13:19:31Z peter $
27 */
28
29#include "opt_ddb.h"
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/systm.h>
34#include <sys/malloc.h>

--- 12 unchanged lines hidden (view full) ---

47#include <vm/vm_zone.h>
48
49#include "linker_if.h"
50
51#ifdef KLD_DEBUG
52int kld_debug = 0;
53#endif
54
27 */
28
29#include "opt_ddb.h"
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/systm.h>
34#include <sys/malloc.h>

--- 12 unchanged lines hidden (view full) ---

47#include <vm/vm_zone.h>
48
49#include "linker_if.h"
50
51#ifdef KLD_DEBUG
52int kld_debug = 0;
53#endif
54
55MALLOC_DEFINE(M_LINKER, "kld", "kernel linker");
56linker_file_t linker_current_file;
55static char *linker_search_path(const char *name);
56static const char *linker_basename(const char* path);
57
58MALLOC_DEFINE(M_LINKER, "linker", "kernel linker");
59
57linker_file_t linker_kernel_file;
58
59static struct lock lock; /* lock for the file list */
60static linker_class_list_t classes;
61static linker_file_list_t linker_files;
62static int next_file_id = 1;
63
60linker_file_t linker_kernel_file;
61
62static struct lock lock; /* lock for the file list */
63static linker_class_list_t classes;
64static linker_file_list_t linker_files;
65static int next_file_id = 1;
66
67/* XXX wrong name; we're looking at version provision tags here, not modules */
68typedef TAILQ_HEAD(, modlist) modlisthead_t;
69struct modlist {
70 TAILQ_ENTRY(modlist) link; /* chain together all modules */
71 linker_file_t container;
72 const char *name;
73};
74typedef struct modlist *modlist_t;
75static modlisthead_t found_modules;
76
64static char *
65linker_strdup(const char *str)
66{
67 char *result;
68
69 if ((result = malloc((strlen(str) + 1), M_LINKER, M_WAITOK)) != NULL)
70 strcpy(result, str);
71 return(result);

--- 8 unchanged lines hidden (view full) ---

80}
81
82SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
83
84int
85linker_add_class(linker_class_t lc)
86{
87 kobj_class_compile((kobj_class_t) lc);
77static char *
78linker_strdup(const char *str)
79{
80 char *result;
81
82 if ((result = malloc((strlen(str) + 1), M_LINKER, M_WAITOK)) != NULL)
83 strcpy(result, str);
84 return(result);

--- 8 unchanged lines hidden (view full) ---

93}
94
95SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
96
97int
98linker_add_class(linker_class_t lc)
99{
100 kobj_class_compile((kobj_class_t) lc);
88 TAILQ_INSERT_HEAD(&classes, lc, link);
101 TAILQ_INSERT_TAIL(&classes, lc, link);
89 return 0;
90}
91
92static void
93linker_file_sysinit(linker_file_t lf)
94{
95 struct linker_set* sysinits;
96 struct sysinit** sipp;
97 struct sysinit** xipp;
98 struct sysinit* save;
102 return 0;
103}
104
105static void
106linker_file_sysinit(linker_file_t lf)
107{
108 struct linker_set* sysinits;
109 struct sysinit** sipp;
110 struct sysinit** xipp;
111 struct sysinit* save;
99 const moduledata_t *moddata;
100 int error;
101
102 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
103 lf->filename));
104
105 sysinits = (struct linker_set*)
106 linker_file_lookup_symbol(lf, "sysinit_set", 0);
107
108 KLD_DPF(FILE, ("linker_file_sysinit: SYSINITs %p\n", sysinits));
109 if (!sysinits)
110 return;
112
113 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
114 lf->filename));
115
116 sysinits = (struct linker_set*)
117 linker_file_lookup_symbol(lf, "sysinit_set", 0);
118
119 KLD_DPF(FILE, ("linker_file_sysinit: SYSINITs %p\n", sysinits));
120 if (!sysinits)
121 return;
111
112 /* HACK ALERT! */
113 for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {
114 if ((*sipp)->func == module_register_init) {
115 moddata = (*sipp)->udata;
116 error = module_register(moddata, lf);
117 if (error)
118 printf("linker_file_sysinit \"%s\" failed to register! %d\n",
119 lf->filename, error);
120 }
121 }
122
123 /*
124 * Perform a bubble sort of the system initialization objects by
125 * their subsystem (primary key) and order (secondary key).
126 *
127 * Since some things care about execution order, this is the
128 * operation which ensures continued function.
129 */
130 for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {

--- 54 unchanged lines hidden (view full) ---

185 (*sipp)->order >= (*xipp)->order))
186 continue; /* skip*/
187 save = *sipp;
188 *sipp = *xipp;
189 *xipp = save;
190 }
191 }
192
122 /*
123 * Perform a bubble sort of the system initialization objects by
124 * their subsystem (primary key) and order (secondary key).
125 *
126 * Since some things care about execution order, this is the
127 * operation which ensures continued function.
128 */
129 for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {

--- 54 unchanged lines hidden (view full) ---

184 (*sipp)->order >= (*xipp)->order))
185 continue; /* skip*/
186 save = *sipp;
187 *sipp = *xipp;
188 *xipp = save;
189 }
190 }
191
193
194 /*
195 * Traverse the (now) ordered list of system initialization tasks.
196 * Perform each task, and continue on to the next task.
197 */
198 for (sipp = (struct sysinit **)sysuninits->ls_items; *sipp; sipp++) {
199 if ((*sipp)->subsystem == SI_SUB_DUMMY)
200 continue; /* skip dummy task(s)*/
201

--- 33 unchanged lines hidden (view full) ---

235
236 KLD_DPF(FILE, ("linker_file_unregister_sysctls: SYSCTLs %p\n", sysctls));
237 if (!sysctls)
238 return;
239
240 sysctl_unregister_set(sysctls);
241}
242
192 /*
193 * Traverse the (now) ordered list of system initialization tasks.
194 * Perform each task, and continue on to the next task.
195 */
196 for (sipp = (struct sysinit **)sysuninits->ls_items; *sipp; sipp++) {
197 if ((*sipp)->subsystem == SI_SUB_DUMMY)
198 continue; /* skip dummy task(s)*/
199

--- 33 unchanged lines hidden (view full) ---

233
234 KLD_DPF(FILE, ("linker_file_unregister_sysctls: SYSCTLs %p\n", sysctls));
235 if (!sysctls)
236 return;
237
238 sysctl_unregister_set(sysctls);
239}
240
241static int
242linker_file_register_modules(linker_file_t lf)
243{
244 int error, mcount;
245 struct linker_set *modules;
246 struct mod_metadata **mdpp;
247 const moduledata_t *moddata;
248 struct sysinit **sipp;
249
250 KLD_DPF(FILE, ("linker_file_register_modules: registering modules in %s\n",
251 lf->filename));
252
253 modules = (struct linker_set*)
254 linker_file_lookup_symbol(lf, "modmetadata_set", 0);
255 mcount = 0;
256 if (modules) {
257 for (mdpp = (struct mod_metadata**)modules->ls_items; *mdpp; mdpp++) {
258 if ((*mdpp)->md_type != MDT_MODULE)
259 continue;
260 mcount++;
261 moddata = (*mdpp)->md_data;
262 KLD_DPF(FILE, ("Registering module %s in %s\n",
263 moddata->name, lf->filename));
264 error = module_register(moddata, lf);
265 if (error)
266 printf("Module %s failed to register: %d\n", moddata->name, error);
267 }
268 }
269 if (mcount)
270 return mcount; /* Do not mix old and new style */
271
272 /* Hack - handle old kld's without metadata */
273 modules = (struct linker_set*)
274 linker_file_lookup_symbol(lf, "sysinit_set", 0);
275 if (modules) {
276 for (sipp = (struct sysinit **)modules->ls_items; *sipp; sipp++) {
277 if ((*sipp)->func != module_register_init)
278 continue;
279 mcount++;
280 moddata = (*sipp)->udata;
281 printf("Old-style KLD file %s found\n", moddata->name);
282 error = module_register(moddata, lf);
283 if (error)
284 printf("Old-style KLD file %s failed to register: %d\n", moddata->name, error);
285 }
286 }
287 return mcount;
288}
289
290static void
291linker_init_kernel_modules(void)
292{
293 linker_file_register_modules(linker_kernel_file);
294}
295
296SYSINIT(linker_kernel, SI_SUB_KLD, SI_ORDER_ANY, linker_init_kernel_modules, 0);
297
243int
244linker_load_file(const char* filename, linker_file_t* result)
245{
246 linker_class_t lc;
247 linker_file_t lf;
248 int foundfile, error = 0;
298int
299linker_load_file(const char* filename, linker_file_t* result)
300{
301 linker_class_t lc;
302 linker_file_t lf;
303 int foundfile, error = 0;
249 char *koname = NULL;
250
251 lf = linker_find_file_by_name(filename);
252 if (lf) {
253 KLD_DPF(FILE, ("linker_load_file: file %s is already loaded, incrementing refs\n", filename));
254 *result = lf;
255 lf->refs++;
256 goto out;
257 }
258
304
305 lf = linker_find_file_by_name(filename);
306 if (lf) {
307 KLD_DPF(FILE, ("linker_load_file: file %s is already loaded, incrementing refs\n", filename));
308 *result = lf;
309 lf->refs++;
310 goto out;
311 }
312
259 koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK);
260 if (koname == NULL) {
261 error = ENOMEM;
262 goto out;
263 }
264 sprintf(koname, "%s.ko", filename);
265 lf = NULL;
266 foundfile = 0;
267 for (lc = TAILQ_FIRST(&classes); lc; lc = TAILQ_NEXT(lc, link)) {
268 KLD_DPF(FILE, ("linker_load_file: trying to load %s as %s\n",
269 filename, lc->desc));
313 lf = NULL;
314 foundfile = 0;
315 for (lc = TAILQ_FIRST(&classes); lc; lc = TAILQ_NEXT(lc, link)) {
316 KLD_DPF(FILE, ("linker_load_file: trying to load %s as %s\n",
317 filename, lc->desc));
270
271 error = LINKER_LOAD_FILE(lc, koname, &lf); /* First with .ko */
272 if (lf == NULL && error == ENOENT)
273 error = LINKER_LOAD_FILE(lc, filename, &lf); /* Then try without */
318 error = LINKER_LOAD_FILE(lc, filename, &lf);
274 /*
275 * If we got something other than ENOENT, then it exists but we cannot
276 * load it for some other reason.
277 */
278 if (error != ENOENT)
279 foundfile = 1;
280 if (lf) {
319 /*
320 * If we got something other than ENOENT, then it exists but we cannot
321 * load it for some other reason.
322 */
323 if (error != ENOENT)
324 foundfile = 1;
325 if (lf) {
326 linker_file_register_modules(lf);
281 linker_file_register_sysctls(lf);
282 linker_file_sysinit(lf);
327 linker_file_register_sysctls(lf);
328 linker_file_sysinit(lf);
329 lf->flags |= LINKER_FILE_LINKED;
283
284 *result = lf;
285 error = 0;
286 goto out;
287 }
288 }
289 /*
290 * Less than ideal, but tells the user whether it failed to load or
291 * the module was not found.
292 */
293 if (foundfile)
294 error = ENOEXEC; /* Format not recognised (or unloadable) */
295 else
296 error = ENOENT; /* Nothing found */
297
298out:
330
331 *result = lf;
332 error = 0;
333 goto out;
334 }
335 }
336 /*
337 * Less than ideal, but tells the user whether it failed to load or
338 * the module was not found.
339 */
340 if (foundfile)
341 error = ENOEXEC; /* Format not recognised (or unloadable) */
342 else
343 error = ENOENT; /* Nothing found */
344
345out:
299 if (koname)
300 free(koname, M_LINKER);
301 return error;
302}
303
304linker_file_t
305linker_find_file_by_name(const char* filename)
306{
307 linker_file_t lf = 0;
308 char *koname;

--- 33 unchanged lines hidden (view full) ---

342}
343
344linker_file_t
345linker_make_file(const char* pathname, linker_class_t lc)
346{
347 linker_file_t lf = 0;
348 const char *filename;
349
346 return error;
347}
348
349linker_file_t
350linker_find_file_by_name(const char* filename)
351{
352 linker_file_t lf = 0;
353 char *koname;

--- 33 unchanged lines hidden (view full) ---

387}
388
389linker_file_t
390linker_make_file(const char* pathname, linker_class_t lc)
391{
392 linker_file_t lf = 0;
393 const char *filename;
394
350 filename = rindex(pathname, '/');
351 if (filename && filename[1])
352 filename++;
353 else
354 filename = pathname;
395 filename = linker_basename(pathname);
355
356 KLD_DPF(FILE, ("linker_make_file: new file, filename=%s\n", filename));
357 lockmgr(&lock, LK_EXCLUSIVE, 0, curproc);
358 lf = (linker_file_t) kobj_create((kobj_class_t) lc, M_LINKER, M_WAITOK);
359 if (!lf)
360 goto out;
361
362 lf->refs = 1;

--- 12 unchanged lines hidden (view full) ---

375 lockmgr(&lock, LK_RELEASE, 0, curproc);
376 return lf;
377}
378
379int
380linker_file_unload(linker_file_t file)
381{
382 module_t mod, next;
396
397 KLD_DPF(FILE, ("linker_make_file: new file, filename=%s\n", filename));
398 lockmgr(&lock, LK_EXCLUSIVE, 0, curproc);
399 lf = (linker_file_t) kobj_create((kobj_class_t) lc, M_LINKER, M_WAITOK);
400 if (!lf)
401 goto out;
402
403 lf->refs = 1;

--- 12 unchanged lines hidden (view full) ---

416 lockmgr(&lock, LK_RELEASE, 0, curproc);
417 return lf;
418}
419
420int
421linker_file_unload(linker_file_t file)
422{
423 module_t mod, next;
424 modlist_t ml, nextml;
383 struct common_symbol* cp;
384 int error = 0;
385 int i;
386
387 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
388 lockmgr(&lock, LK_EXCLUSIVE, 0, curproc);
389 if (file->refs == 1) {
390 KLD_DPF(FILE, ("linker_file_unload: file is unloading, informing modules\n"));

--- 18 unchanged lines hidden (view full) ---

409 }
410
411 file->refs--;
412 if (file->refs > 0) {
413 lockmgr(&lock, LK_RELEASE, 0, curproc);
414 goto out;
415 }
416
425 struct common_symbol* cp;
426 int error = 0;
427 int i;
428
429 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
430 lockmgr(&lock, LK_EXCLUSIVE, 0, curproc);
431 if (file->refs == 1) {
432 KLD_DPF(FILE, ("linker_file_unload: file is unloading, informing modules\n"));

--- 18 unchanged lines hidden (view full) ---

451 }
452
453 file->refs--;
454 if (file->refs > 0) {
455 lockmgr(&lock, LK_RELEASE, 0, curproc);
456 goto out;
457 }
458
459 for (ml = TAILQ_FIRST(&found_modules); ml; ml = nextml) {
460 nextml = TAILQ_NEXT(ml, link);
461 if (ml->container == file) {
462 TAILQ_REMOVE(&found_modules, ml, link);
463 }
464 }
465
417 /* Don't try to run SYSUNINITs if we are unloaded due to a link error */
418 if (file->flags & LINKER_FILE_LINKED) {
419 linker_file_sysuninit(file);
420 linker_file_unregister_sysctls(file);
421 }
422
423 TAILQ_REMOVE(&linker_files, file, link);
424 lockmgr(&lock, LK_RELEASE, 0, curproc);
425
466 /* Don't try to run SYSUNINITs if we are unloaded due to a link error */
467 if (file->flags & LINKER_FILE_LINKED) {
468 linker_file_sysuninit(file);
469 linker_file_unregister_sysctls(file);
470 }
471
472 TAILQ_REMOVE(&linker_files, file, link);
473 lockmgr(&lock, LK_RELEASE, 0, curproc);
474
426 for (i = 0; i < file->ndeps; i++)
427 linker_file_unload(file->deps[i]);
428 free(file->deps, M_LINKER);
475 if (file->deps) {
476 for (i = 0; i < file->ndeps; i++)
477 linker_file_unload(file->deps[i]);
478 free(file->deps, M_LINKER);
479 file->deps = NULL;
480 }
429
430 for (cp = STAILQ_FIRST(&file->common); cp;
431 cp = STAILQ_FIRST(&file->common)) {
432 STAILQ_REMOVE(&file->common, cp, common_symbol, link);
433 free(cp, M_LINKER);
434 }
435
436 LINKER_UNLOAD(file);
481
482 for (cp = STAILQ_FIRST(&file->common); cp;
483 cp = STAILQ_FIRST(&file->common)) {
484 STAILQ_REMOVE(&file->common, cp, common_symbol, link);
485 free(cp, M_LINKER);
486 }
487
488 LINKER_UNLOAD(file);
437 free(file->filename, M_LINKER);
489 if (file->filename) {
490 free(file->filename, M_LINKER);
491 file->filename = NULL;
492 }
438 kobj_delete((kobj_t) file, M_LINKER);
439
440out:
441 return error;
442}
443
444int
445linker_file_add_dependancy(linker_file_t file, linker_file_t dep)

--- 17 unchanged lines hidden (view full) ---

463 return 0;
464}
465
466caddr_t
467linker_file_lookup_symbol(linker_file_t file, const char* name, int deps)
468{
469 c_linker_sym_t sym;
470 linker_symval_t symval;
493 kobj_delete((kobj_t) file, M_LINKER);
494
495out:
496 return error;
497}
498
499int
500linker_file_add_dependancy(linker_file_t file, linker_file_t dep)

--- 17 unchanged lines hidden (view full) ---

518 return 0;
519}
520
521caddr_t
522linker_file_lookup_symbol(linker_file_t file, const char* name, int deps)
523{
524 c_linker_sym_t sym;
525 linker_symval_t symval;
471 linker_file_t lf;
472 caddr_t address;
473 size_t common_size = 0;
474 int i;
475
476 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%x, name=%s, deps=%d\n",
477 file, name, deps));
478
479 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {

--- 13 unchanged lines hidden (view full) ---

493 if (deps) {
494 for (i = 0; i < file->ndeps; i++) {
495 address = linker_file_lookup_symbol(file->deps[i], name, 0);
496 if (address) {
497 KLD_DPF(SYM, ("linker_file_lookup_symbol: deps value=%x\n", address));
498 return address;
499 }
500 }
526 caddr_t address;
527 size_t common_size = 0;
528 int i;
529
530 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%x, name=%s, deps=%d\n",
531 file, name, deps));
532
533 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {

--- 13 unchanged lines hidden (view full) ---

547 if (deps) {
548 for (i = 0; i < file->ndeps; i++) {
549 address = linker_file_lookup_symbol(file->deps[i], name, 0);
550 if (address) {
551 KLD_DPF(SYM, ("linker_file_lookup_symbol: deps value=%x\n", address));
552 return address;
553 }
554 }
501
502 /* If we have not found it in the dependencies, search globally */
503 for (lf = TAILQ_FIRST(&linker_files); lf; lf = TAILQ_NEXT(lf, link)) {
504 /* But skip the current file if it's on the list */
505 if (lf == file)
506 continue;
507 /* And skip the files we searched above */
508 for (i = 0; i < file->ndeps; i++)
509 if (lf == file->deps[i])
510 break;
511 if (i < file->ndeps)
512 continue;
513 address = linker_file_lookup_symbol(lf, name, 0);
514 if (address) {
515 KLD_DPF(SYM, ("linker_file_lookup_symbol: global value=%x\n", address));
516 return address;
517 }
518 }
519 }
520
521 if (common_size > 0) {
522 /*
523 * This is a common symbol which was not found in the
524 * dependancies. We maintain a simple common symbol table in
525 * the file object.
526 */

--- 104 unchanged lines hidden (view full) ---

631
632/*
633 * Syscalls.
634 */
635
636int
637kldload(struct proc* p, struct kldload_args* uap)
638{
555 }
556
557 if (common_size > 0) {
558 /*
559 * This is a common symbol which was not found in the
560 * dependancies. We maintain a simple common symbol table in
561 * the file object.
562 */

--- 104 unchanged lines hidden (view full) ---

667
668/*
669 * Syscalls.
670 */
671
672int
673kldload(struct proc* p, struct kldload_args* uap)
674{
639 char* filename = NULL, *modulename;
675 char* pathname, *realpath;
676 const char *filename;
640 linker_file_t lf;
641 int error = 0;
642
643 p->p_retval[0] = -1;
644
645 if (securelevel > 0)
646 return EPERM;
647
648 if ((error = suser(p)) != 0)
649 return error;
650
677 linker_file_t lf;
678 int error = 0;
679
680 p->p_retval[0] = -1;
681
682 if (securelevel > 0)
683 return EPERM;
684
685 if ((error = suser(p)) != 0)
686 return error;
687
651 filename = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
652 if ((error = copyinstr(SCARG(uap, file), filename, MAXPATHLEN, NULL)) != 0)
688 realpath = NULL;
689 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
690 if ((error = copyinstr(SCARG(uap, file), pathname, MAXPATHLEN, NULL)) != 0)
653 goto out;
654
691 goto out;
692
655 /* Can't load more than one module with the same name */
656 modulename = rindex(filename, '/');
657 if (modulename == NULL)
658 modulename = filename;
659 else
660 modulename++;
661 if (linker_find_file_by_name(modulename)) {
693 realpath = linker_search_path(pathname);
694 if (realpath == NULL) {
695 error = ENOENT;
696 goto out;
697 }
698 /* Can't load more than one file with the same name */
699 filename = linker_basename(realpath);
700 if (linker_find_file_by_name(filename)) {
662 error = EEXIST;
663 goto out;
664 }
665
701 error = EEXIST;
702 goto out;
703 }
704
666 if ((error = linker_load_file(filename, &lf)) != 0)
705 if ((error = linker_load_file(realpath, &lf)) != 0)
667 goto out;
668
669 lf->userrefs++;
670 p->p_retval[0] = lf->id;
671
672out:
706 goto out;
707
708 lf->userrefs++;
709 p->p_retval[0] = lf->id;
710
711out:
673 if (filename)
674 free(filename, M_TEMP);
712 if (pathname)
713 free(pathname, M_TEMP);
714 if (realpath)
715 free(realpath, M_LINKER);
675 return error;
676}
677
678int
679kldunload(struct proc* p, struct kldunload_args* uap)
680{
681 linker_file_t lf;
682 int error = 0;
683
684 if (securelevel > 0)
685 return EPERM;
686
687 if ((error = suser(p)) != 0)
688 return error;
689
690 lf = linker_find_file_by_id(SCARG(uap, fileid));
691 if (lf) {
692 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
693 if (lf->userrefs == 0) {
716 return error;
717}
718
719int
720kldunload(struct proc* p, struct kldunload_args* uap)
721{
722 linker_file_t lf;
723 int error = 0;
724
725 if (securelevel > 0)
726 return EPERM;
727
728 if ((error = suser(p)) != 0)
729 return error;
730
731 lf = linker_find_file_by_id(SCARG(uap, fileid));
732 if (lf) {
733 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
734 if (lf->userrefs == 0) {
694 printf("linkerunload: attempt to unload file that was loaded by the kernel\n");
735 printf("kldunload: attempt to unload file that was loaded by the kernel\n");
695 error = EBUSY;
696 goto out;
697 }
698 lf->userrefs--;
699 error = linker_file_unload(lf);
700 if (error)
701 lf->userrefs++;
702 } else
703 error = ENOENT;
704
705out:
706 return error;
707}
708
709int
710kldfind(struct proc* p, struct kldfind_args* uap)
711{
736 error = EBUSY;
737 goto out;
738 }
739 lf->userrefs--;
740 error = linker_file_unload(lf);
741 if (error)
742 lf->userrefs++;
743 } else
744 error = ENOENT;
745
746out:
747 return error;
748}
749
750int
751kldfind(struct proc* p, struct kldfind_args* uap)
752{
712 char* filename = NULL, *modulename;
753 char* pathname;
754 const char *filename;
713 linker_file_t lf;
714 int error = 0;
715
716 p->p_retval[0] = -1;
717
755 linker_file_t lf;
756 int error = 0;
757
758 p->p_retval[0] = -1;
759
718 filename = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
719 if ((error = copyinstr(SCARG(uap, file), filename, MAXPATHLEN, NULL)) != 0)
760 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
761 if ((error = copyinstr(SCARG(uap, file), pathname, MAXPATHLEN, NULL)) != 0)
720 goto out;
721
762 goto out;
763
722 modulename = rindex(filename, '/');
723 if (modulename == NULL)
724 modulename = filename;
764 filename = linker_basename(pathname);
725
765
726 lf = linker_find_file_by_name(modulename);
766 lf = linker_find_file_by_name(filename);
727 if (lf)
728 p->p_retval[0] = lf->id;
729 else
730 error = ENOENT;
731
732out:
767 if (lf)
768 p->p_retval[0] = lf->id;
769 else
770 error = ENOENT;
771
772out:
733 if (filename)
734 free(filename, M_TEMP);
773 if (pathname)
774 free(pathname, M_TEMP);
735 return error;
736}
737
738int
739kldnext(struct proc* p, struct kldnext_args* uap)
740{
741 linker_file_t lf;
742 int error = 0;

--- 135 unchanged lines hidden (view full) ---

878 free(symstr, M_TEMP);
879 return error;
880}
881
882/*
883 * Preloaded module support
884 */
885
775 return error;
776}
777
778int
779kldnext(struct proc* p, struct kldnext_args* uap)
780{
781 linker_file_t lf;
782 int error = 0;

--- 135 unchanged lines hidden (view full) ---

918 free(symstr, M_TEMP);
919 return error;
920}
921
922/*
923 * Preloaded module support
924 */
925
926static modlist_t
927modlist_lookup(const char *name)
928{
929 modlist_t mod;
930
931 for (mod = TAILQ_FIRST(&found_modules); mod; mod = TAILQ_NEXT(mod, link)) {
932 if (!strcmp(mod->name, name))
933 return mod;
934 }
935 return NULL;
936}
937
938/*
939 * This routine is cheap and nasty but will work for data pointers.
940 */
941static void *
942linker_reloc_ptr(linker_file_t lf, void *offset)
943{
944 return lf->address + (uintptr_t)offset;
945}
946
886static void
887linker_preload(void* arg)
888{
889 caddr_t modptr;
890 char *modname;
891 char *modtype;
892 linker_file_t lf;
893 linker_class_t lc;
947static void
948linker_preload(void* arg)
949{
950 caddr_t modptr;
951 char *modname;
952 char *modtype;
953 linker_file_t lf;
954 linker_class_t lc;
894 int error;
955 int error, mcount;
895 struct linker_set *sysinits;
956 struct linker_set *sysinits;
896 struct sysinit **sipp;
897 const moduledata_t *moddata;
957 linker_file_list_t loaded_files;
958 linker_file_list_t depended_files;
959 struct linker_set *deps;
960 struct mod_metadata *mp;
961 int i;
962 int resolves;
963 modlist_t mod;
898
964
965 TAILQ_INIT(&loaded_files);
966 TAILQ_INIT(&depended_files);
967 TAILQ_INIT(&found_modules);
968 error = 0;
969
899 modptr = NULL;
900 while ((modptr = preload_search_next_name(modptr)) != NULL) {
901 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
902 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
903 if (modname == NULL) {
904 printf("Preloaded module at %p does not have a name!\n", modptr);
905 continue;
906 }
907 if (modtype == NULL) {
908 printf("Preloaded module at %p does not have a type!\n", modptr);
909 continue;
910 }
911 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname, modptr);
970 modptr = NULL;
971 while ((modptr = preload_search_next_name(modptr)) != NULL) {
972 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
973 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
974 if (modname == NULL) {
975 printf("Preloaded module at %p does not have a name!\n", modptr);
976 continue;
977 }
978 if (modtype == NULL) {
979 printf("Preloaded module at %p does not have a type!\n", modptr);
980 continue;
981 }
982 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname, modptr);
912 lf = linker_find_file_by_name(modname);
913 if (lf) {
914 lf->userrefs++;
915 continue;
916 }
917 lf = NULL;
918 for (lc = TAILQ_FIRST(&classes); lc; lc = TAILQ_NEXT(lc, link)) {
983 lf = NULL;
984 for (lc = TAILQ_FIRST(&classes); lc; lc = TAILQ_NEXT(lc, link)) {
919 error = LINKER_LOAD_FILE(lc, modname, &lf);
985 error = LINKER_LINK_PRELOAD(lc, modname, &lf);
920 if (error) {
921 lf = NULL;
922 break;
923 }
924 }
986 if (error) {
987 lf = NULL;
988 break;
989 }
990 }
925 if (lf) {
926 lf->userrefs++;
991 if (lf)
992 TAILQ_INSERT_TAIL(&loaded_files, lf, loaded);
993 }
927
994
928 sysinits = (struct linker_set*)
929 linker_file_lookup_symbol(lf, "sysinit_set", 0);
930 if (sysinits) {
931 /* HACK ALERT!
932 * This is to set the sysinit moduledata so that the module
933 * can attach itself to the correct containing file.
934 * The sysinit could be run at *any* time.
935 */
936 for (sipp = (struct sysinit **)sysinits->ls_items; *sipp; sipp++) {
937 if ((*sipp)->func == module_register_init) {
938 moddata = (*sipp)->udata;
939 error = module_register(moddata, lf);
940 if (error)
941 printf("Preloaded %s \"%s\" failed to register: %d\n",
942 modtype, modname, error);
995 /*
996 * First get a list of stuff in the kernel.
997 */
998 deps = (struct linker_set*)
999 linker_file_lookup_symbol(linker_kernel_file, MDT_SETNAME, 0);
1000 if (deps) {
1001 for (i = 0; i < deps->ls_length; i++) {
1002 mp = deps->ls_items[i];
1003 if (mp->md_type != MDT_VERSION)
1004 continue;
1005 modname = mp->md_cval;
1006 if (modlist_lookup(modname) != NULL) {
1007 printf("module %s already present!\n", modname);
1008 /* XXX what can we do? this is a build error. :-( */
1009 continue;
1010 }
1011 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT);
1012 if (mod == NULL)
1013 panic("no memory for module list");
1014 bzero(mod, sizeof(*mod));
1015 mod->container = linker_kernel_file;
1016 mod->name = modname;
1017 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1018 }
1019 }
1020
1021 /*
1022 * this is a once-off kinky bubble sort
1023 * resolve relocation dependency requirements
1024 */
1025restart:
1026 for (lf = TAILQ_FIRST(&loaded_files); lf; lf = TAILQ_NEXT(lf, loaded)) {
1027 deps = (struct linker_set*)
1028 linker_file_lookup_symbol(lf, MDT_SETNAME, 0);
1029 /*
1030 * First, look to see if we would successfully link with this stuff.
1031 */
1032 resolves = 1; /* unless we know otherwise */
1033 if (deps) {
1034 for (i = 0; i < deps->ls_length; i++) {
1035 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1036 if (mp->md_type != MDT_DEPEND)
1037 continue;
1038 modname = linker_reloc_ptr(lf, mp->md_cval);
1039 if (modlist_lookup(modname) == NULL) {
1040 /* ok, the module isn't here yet, we are not finished */
1041 resolves = 0;
1042 }
1043 }
1044 }
1045 /*
1046 * OK, if we found our modules, we can link. So, "provide" the
1047 * modules inside and add it to the end of the link order list.
1048 */
1049 if (resolves) {
1050 if (deps) {
1051 for (i = 0; i < deps->ls_length; i++) {
1052 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1053 if (mp->md_type != MDT_VERSION)
1054 continue;
1055 modname = linker_reloc_ptr(lf, mp->md_cval);
1056 if (modlist_lookup(modname) != NULL) {
1057 printf("module %s already present!\n", modname);
1058 linker_file_unload(lf);
1059 TAILQ_REMOVE(&loaded_files, lf, loaded);
1060 goto restart; /* we changed the tailq next ptr */
943 }
1061 }
1062 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT);
1063 if (mod == NULL)
1064 panic("no memory for module list");
1065 bzero(mod, sizeof(*mod));
1066 mod->container = lf;
1067 mod->name = modname;
1068 TAILQ_INSERT_TAIL(&found_modules, mod, link);
944 }
1069 }
945 sysinit_add((struct sysinit **)sysinits->ls_items);
946 }
1070 }
947 linker_file_register_sysctls(lf);
1071 TAILQ_REMOVE(&loaded_files, lf, loaded);
1072 TAILQ_INSERT_TAIL(&depended_files, lf, loaded);
1073 /*
1074 * Since we provided modules, we need to restart the sort so
1075 * that the previous files that depend on us have a chance.
1076 * Also, we've busted the tailq next pointer with the REMOVE.
1077 */
1078 goto restart;
948 }
949 }
1079 }
1080 }
1081
1082 /*
1083 * At this point, we check to see what could not be resolved..
1084 */
1085 for (lf = TAILQ_FIRST(&loaded_files); lf; lf = TAILQ_NEXT(lf, loaded)) {
1086 printf("KLD file %s is missing dependencies\n", lf->filename);
1087 linker_file_unload(lf);
1088 TAILQ_REMOVE(&loaded_files, lf, loaded);
1089 }
1090
1091 /*
1092 * We made it. Finish off the linking in the order we determined.
1093 */
1094 for (lf = TAILQ_FIRST(&depended_files); lf; lf = TAILQ_NEXT(lf, loaded)) {
1095 if (linker_kernel_file) {
1096 linker_kernel_file->refs++;
1097 error = linker_file_add_dependancy(lf, linker_kernel_file);
1098 if (error)
1099 panic("cannot add dependency");
1100 }
1101 lf->userrefs++; /* so we can (try to) kldunload it */
1102 deps = (struct linker_set*)
1103 linker_file_lookup_symbol(lf, MDT_SETNAME, 0);
1104 if (deps) {
1105 for (i = 0; i < deps->ls_length; i++) {
1106 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1107 if (mp->md_type != MDT_DEPEND)
1108 continue;
1109 modname = linker_reloc_ptr(lf, mp->md_cval);
1110 mod = modlist_lookup(modname);
1111 mod->container->refs++;
1112 error = linker_file_add_dependancy(lf, mod->container);
1113 if (error)
1114 panic("cannot add dependency");
1115 }
1116 }
1117
1118 /* Now do relocation etc using the symbol search paths established by the dependencies */
1119 error = LINKER_LINK_PRELOAD_FINISH(lf);
1120 if (error) {
1121 printf("KLD file %s - could not finalize loading\n", lf->filename);
1122 linker_file_unload(lf);
1123 continue;
1124 }
1125
1126 mcount = linker_file_register_modules(lf);
1127 sysinits = (struct linker_set*)
1128 linker_file_lookup_symbol(lf, "sysinit_set", 0);
1129 if (sysinits)
1130 sysinit_add((struct sysinit **)sysinits->ls_items);
1131 linker_file_register_sysctls(lf);
1132 lf->flags |= LINKER_FILE_LINKED;
1133 }
1134 /* woohoo! we made it! */
950}
951
952SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
953
954/*
955 * Search for a not-loaded module by name.
956 *
957 * Modules may be found in the following locations:

--- 8 unchanged lines hidden (view full) ---

966 * character as a separator to be consistent with the bootloader.
967 */
968
969static char linker_path[MAXPATHLEN] = "/;/boot/;/modules/";
970
971SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RW, linker_path,
972 sizeof(linker_path), "module load search path");
973
1135}
1136
1137SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
1138
1139/*
1140 * Search for a not-loaded module by name.
1141 *
1142 * Modules may be found in the following locations:

--- 8 unchanged lines hidden (view full) ---

1151 * character as a separator to be consistent with the bootloader.
1152 */
1153
1154static char linker_path[MAXPATHLEN] = "/;/boot/;/modules/";
1155
1156SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RW, linker_path,
1157 sizeof(linker_path), "module load search path");
1158
974char *
1159static char *linker_ext_list[] = {
1160 ".ko",
1161 "",
1162 NULL
1163};
1164
1165static char *
975linker_search_path(const char *name)
976{
977 struct nameidata nd;
978 struct proc *p = curproc; /* XXX */
1166linker_search_path(const char *name)
1167{
1168 struct nameidata nd;
1169 struct proc *p = curproc; /* XXX */
979 char *cp, *ep, *result;
980 int error;
1170 char *cp, *ep, *result, **cpp;
1171 int error, extlen, len;
981 enum vtype type;
982
983 /* qualified at all? */
984 if (index(name, '/'))
985 return(linker_strdup(name));
986
1172 enum vtype type;
1173
1174 /* qualified at all? */
1175 if (index(name, '/'))
1176 return(linker_strdup(name));
1177
1178 extlen = 0;
1179 for (cpp = linker_ext_list; *cpp; cpp++) {
1180 len = strlen(*cpp);
1181 if (len > extlen)
1182 extlen = len;
1183 }
1184 extlen++; /* trailing '\0' */
1185
987 /* traverse the linker path */
988 cp = linker_path;
1186 /* traverse the linker path */
1187 cp = linker_path;
1188 len = strlen(name);
989 for (;;) {
990
991 /* find the end of this component */
992 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++)
993 ;
1189 for (;;) {
1190
1191 /* find the end of this component */
1192 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++)
1193 ;
994 result = malloc((strlen(name) + (ep - cp) + 1), M_LINKER, M_WAITOK);
1194 result = malloc((len + (ep - cp) + extlen), M_LINKER, M_WAITOK);
995 if (result == NULL) /* actually ENOMEM */
996 return(NULL);
1195 if (result == NULL) /* actually ENOMEM */
1196 return(NULL);
1197 for (cpp = linker_ext_list; *cpp; cpp++) {
1198 strncpy(result, cp, ep - cp);
1199 strcpy(result + (ep - cp), name);
1200 strcat(result, *cpp);
997
1201
998 strncpy(result, cp, ep - cp);
999 strcpy(result + (ep - cp), name);
1000
1001 /*
1002 * Attempt to open the file, and return the path if we succeed and it's
1003 * a regular file.
1004 */
1005 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, result, p);
1006 error = vn_open(&nd, FREAD, 0);
1007 if (error == 0) {
1008 NDFREE(&nd, NDF_ONLY_PNBUF);
1009 type = nd.ni_vp->v_type;
1010 VOP_UNLOCK(nd.ni_vp, 0, p);
1011 vn_close(nd.ni_vp, FREAD, p->p_ucred, p);
1012 if (type == VREG)
1013 return(result);
1202 /*
1203 * Attempt to open the file, and return the path if we succeed
1204 * and it's a regular file.
1205 */
1206 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, result, p);
1207 error = vn_open(&nd, FREAD, 0);
1208 if (error == 0) {
1209 NDFREE(&nd, NDF_ONLY_PNBUF);
1210 type = nd.ni_vp->v_type;
1211 VOP_UNLOCK(nd.ni_vp, 0, p);
1212 vn_close(nd.ni_vp, FREAD, p->p_ucred, p);
1213 if (type == VREG)
1214 return(result);
1215 }
1014 }
1015 free(result, M_LINKER);
1016
1017 if (*ep == 0)
1018 break;
1019 cp = ep + 1;
1020 }
1021 return(NULL);
1022}
1216 }
1217 free(result, M_LINKER);
1218
1219 if (*ep == 0)
1220 break;
1221 cp = ep + 1;
1222 }
1223 return(NULL);
1224}
1225
1226static const char *
1227linker_basename(const char* path)
1228{
1229 const char *filename;
1230
1231 filename = rindex(path, '/');
1232 if (filename == NULL)
1233 return path;
1234 if (filename[1])
1235 filename++;
1236 return filename;
1237}
1238
1239/*
1240 * Find a file which contains given module and load it,
1241 * if "parent" is not NULL, register a reference to it.
1242 */
1243static int
1244linker_load_module(const char *modname, struct linker_file *parent)
1245{
1246 linker_file_t lfdep;
1247 const char *filename;
1248 char *pathname;
1249 int error;
1250
1251 /*
1252 * There will be a system to look up or guess a file name from
1253 * a module name.
1254 * For now we just try to load a file with the same name.
1255 */
1256 pathname = linker_search_path(modname);
1257 if (pathname == NULL)
1258 return ENOENT;
1259
1260 /* Can't load more than one file with the same basename */
1261 filename = linker_basename(pathname);
1262 if (linker_find_file_by_name(filename)) {
1263 error = EEXIST;
1264 goto out;
1265 }
1266
1267 do {
1268 error = linker_load_file(pathname, &lfdep);
1269 if (error)
1270 break;
1271 if (parent) {
1272 error = linker_file_add_dependancy(parent, lfdep);
1273 if (error)
1274 break;
1275 }
1276 } while(0);
1277out:
1278 if (pathname)
1279 free(pathname, M_LINKER);
1280 return error;
1281}
1282
1283/*
1284 * This routine is responsible for finding dependencies of userland
1285 * initiated kldload(2)'s of files.
1286 */
1287int
1288linker_load_dependancies(linker_file_t lf)
1289{
1290 linker_file_t lfdep;
1291 struct linker_set *deps;
1292 struct mod_metadata *mp, *nmp;
1293 modlist_t mod;
1294 char *modname, *nmodname;
1295 int i, j, error = 0;
1296
1297 /*
1298 * All files are dependant on /kernel.
1299 */
1300 if (linker_kernel_file) {
1301 linker_kernel_file->refs++;
1302 error = linker_file_add_dependancy(lf, linker_kernel_file);
1303 if (error)
1304 return error;
1305 }
1306
1307 deps = (struct linker_set*)
1308 linker_file_lookup_symbol(lf, MDT_SETNAME, 0);
1309 if (deps != NULL) {
1310 for (i = 0; i < deps->ls_length; i++) {
1311 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1312 if (mp->md_type != MDT_VERSION)
1313 continue;
1314 modname = linker_reloc_ptr(lf, mp->md_cval);
1315 if (modlist_lookup(modname) != NULL) {
1316 printf("module %s already present!\n", modname);
1317 return EEXIST;
1318 }
1319 }
1320 }
1321 if (deps != NULL) {
1322 for (i = 0; i < deps->ls_length; i++) {
1323 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1324 if (mp->md_type != MDT_DEPEND)
1325 continue;
1326 modname = linker_reloc_ptr(lf, mp->md_cval);
1327 nmodname = NULL;
1328 for (j = 0; j < deps->ls_length; j++) {
1329 nmp = linker_reloc_ptr(lf, deps->ls_items[j]);
1330 if (nmp->md_type != MDT_VERSION)
1331 continue;
1332 nmodname = linker_reloc_ptr(lf, nmp->md_cval);
1333 if (strcmp(modname, nmodname) == 0)
1334 break;
1335 }
1336 if (j < deps->ls_length) /* early exit, it's a self reference */
1337 continue;
1338 mod = modlist_lookup(modname);
1339 if (mod) { /* woohoo, it's loaded already */
1340 lfdep = mod->container;
1341 lfdep->refs++;
1342 error = linker_file_add_dependancy(lf, lfdep);
1343 if (error)
1344 break;
1345 continue;
1346 }
1347 error = linker_load_module(modname, lf);
1348 if (error) {
1349 printf("KLD %s: depends on %s - not available\n",
1350 lf->filename, modname);
1351 break;
1352 }
1353 }
1354
1355 }
1356 if (error == 0 && deps) {
1357 for (i = 0; i < deps->ls_length; i++) {
1358 mp = linker_reloc_ptr(lf, deps->ls_items[i]);
1359 if (mp->md_type != MDT_VERSION)
1360 continue;
1361 modname = linker_reloc_ptr(lf, mp->md_cval);
1362 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT);
1363 if (mod == NULL)
1364 panic("no memory for module list");
1365 bzero(mod, sizeof(*mod));
1366 mod->container = lf;
1367 mod->name = modname;
1368 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1369 }
1370 }
1371 return error;
1372}