2 * Copyright (c) 1997-2000 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include "opt_hwpmc_hooks.h"
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/sysproto.h>
39 #include <sys/sysent.h>
43 #include <sys/mutex.h>
45 #include <sys/module.h>
46 #include <sys/mount.h>
47 #include <sys/linker.h>
48 #include <sys/eventhandler.h>
49 #include <sys/fcntl.h>
51 #include <sys/libkern.h>
52 #include <sys/namei.h>
53 #include <sys/vnode.h>
54 #include <sys/syscallsubr.h>
55 #include <sys/sysctl.h>
59 #include <security/mac/mac_framework.h>
61 #include "linker_if.h"
64 #include <sys/pmckern.h>
69 SYSCTL_INT(_debug, OID_AUTO, kld_debug, CTLFLAG_RWTUN,
70 &kld_debug, 0, "Set various levels of KLD debug");
74 * static char *linker_search_path(const char *name, struct mod_depend
77 static const char *linker_basename(const char *path);
80 * Find a currently loaded file given its filename.
82 static linker_file_t linker_find_file_by_name(const char* _filename);
85 * Find a currently loaded file given its file id.
87 static linker_file_t linker_find_file_by_id(int _fileid);
89 /* Metadata from the static kernel */
90 SET_DECLARE(modmetadata_set, struct mod_metadata);
92 MALLOC_DEFINE(M_LINKER, "linker", "kernel linker");
94 linker_file_t linker_kernel_file;
96 static struct sx kld_sx; /* kernel linker lock */
99 * Load counter used by clients to determine if a linker file has been
100 * re-loaded. This counter is incremented for each file load.
104 static linker_class_list_t classes;
105 static linker_file_list_t linker_files;
106 static int next_file_id = 1;
107 static int linker_no_more_classes = 0;
109 #define LINKER_GET_NEXT_FILE_ID(a) do { \
110 linker_file_t lftmp; \
113 sx_assert(&kld_sx, SA_XLOCKED); \
115 TAILQ_FOREACH(lftmp, &linker_files, link) { \
116 if (next_file_id == lftmp->id) { \
121 (a) = next_file_id; \
125 /* XXX wrong name; we're looking at version provision tags here, not modules */
126 typedef TAILQ_HEAD(, modlist) modlisthead_t;
128 TAILQ_ENTRY(modlist) link; /* chain together all modules */
129 linker_file_t container;
133 typedef struct modlist *modlist_t;
134 static modlisthead_t found_modules;
136 static int linker_file_add_dependency(linker_file_t file,
138 static caddr_t linker_file_lookup_symbol_internal(linker_file_t file,
139 const char* name, int deps);
140 static int linker_load_module(const char *kldname,
141 const char *modname, struct linker_file *parent,
142 struct mod_depend *verinfo, struct linker_file **lfpp);
143 static modlist_t modlist_lookup2(const char *name, struct mod_depend *verinfo);
146 linker_init(void *arg)
149 sx_init(&kld_sx, "kernel linker");
150 TAILQ_INIT(&classes);
151 TAILQ_INIT(&linker_files);
154 SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
157 linker_stop_class_add(void *arg)
160 linker_no_more_classes = 1;
163 SYSINIT(linker_class, SI_SUB_KLD, SI_ORDER_ANY, linker_stop_class_add, NULL);
166 linker_add_class(linker_class_t lc)
170 * We disallow any class registration past SI_ORDER_ANY
171 * of SI_SUB_KLD. We bump the reference count to keep the
172 * ops from being freed.
174 if (linker_no_more_classes == 1)
176 kobj_class_compile((kobj_class_t) lc);
177 ((kobj_class_t)lc)->refs++; /* XXX: kobj_mtx */
178 TAILQ_INSERT_TAIL(&classes, lc, link);
183 linker_file_sysinit(linker_file_t lf)
185 struct sysinit **start, **stop, **sipp, **xipp, *save;
187 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
190 sx_assert(&kld_sx, SA_XLOCKED);
192 if (linker_file_lookup_set(lf, "sysinit_set", &start, &stop, NULL) != 0)
195 * Perform a bubble sort of the system initialization objects by
196 * their subsystem (primary key) and order (secondary key).
198 * Since some things care about execution order, this is the operation
199 * which ensures continued function.
201 for (sipp = start; sipp < stop; sipp++) {
202 for (xipp = sipp + 1; xipp < stop; xipp++) {
203 if ((*sipp)->subsystem < (*xipp)->subsystem ||
204 ((*sipp)->subsystem == (*xipp)->subsystem &&
205 (*sipp)->order <= (*xipp)->order))
214 * Traverse the (now) ordered list of system initialization tasks.
215 * Perform each task, and continue on to the next task.
219 for (sipp = start; sipp < stop; sipp++) {
220 if ((*sipp)->subsystem == SI_SUB_DUMMY)
221 continue; /* skip dummy task(s) */
224 (*((*sipp)->func)) ((*sipp)->udata);
231 linker_file_sysuninit(linker_file_t lf)
233 struct sysinit **start, **stop, **sipp, **xipp, *save;
235 KLD_DPF(FILE, ("linker_file_sysuninit: calling SYSUNINITs for %s\n",
238 sx_assert(&kld_sx, SA_XLOCKED);
240 if (linker_file_lookup_set(lf, "sysuninit_set", &start, &stop,
245 * Perform a reverse bubble sort of the system initialization objects
246 * by their subsystem (primary key) and order (secondary key).
248 * Since some things care about execution order, this is the operation
249 * which ensures continued function.
251 for (sipp = start; sipp < stop; sipp++) {
252 for (xipp = sipp + 1; xipp < stop; xipp++) {
253 if ((*sipp)->subsystem > (*xipp)->subsystem ||
254 ((*sipp)->subsystem == (*xipp)->subsystem &&
255 (*sipp)->order >= (*xipp)->order))
264 * Traverse the (now) ordered list of system initialization tasks.
265 * Perform each task, and continue on to the next task.
269 for (sipp = start; sipp < stop; sipp++) {
270 if ((*sipp)->subsystem == SI_SUB_DUMMY)
271 continue; /* skip dummy task(s) */
274 (*((*sipp)->func)) ((*sipp)->udata);
281 linker_file_register_sysctls(linker_file_t lf)
283 struct sysctl_oid **start, **stop, **oidp;
286 ("linker_file_register_sysctls: registering SYSCTLs for %s\n",
289 sx_assert(&kld_sx, SA_XLOCKED);
291 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
296 for (oidp = start; oidp < stop; oidp++)
297 sysctl_register_oid(*oidp);
303 linker_file_unregister_sysctls(linker_file_t lf)
305 struct sysctl_oid **start, **stop, **oidp;
307 KLD_DPF(FILE, ("linker_file_unregister_sysctls: unregistering SYSCTLs"
308 " for %s\n", lf->filename));
310 sx_assert(&kld_sx, SA_XLOCKED);
312 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
317 for (oidp = start; oidp < stop; oidp++)
318 sysctl_unregister_oid(*oidp);
324 linker_file_register_modules(linker_file_t lf)
326 struct mod_metadata **start, **stop, **mdp;
327 const moduledata_t *moddata;
328 int first_error, error;
330 KLD_DPF(FILE, ("linker_file_register_modules: registering modules"
331 " in %s\n", lf->filename));
333 sx_assert(&kld_sx, SA_XLOCKED);
335 if (linker_file_lookup_set(lf, "modmetadata_set", &start,
338 * This fallback should be unnecessary, but if we get booted
339 * from boot2 instead of loader and we are missing our
340 * metadata then we have to try the best we can.
342 if (lf == linker_kernel_file) {
343 start = SET_BEGIN(modmetadata_set);
344 stop = SET_LIMIT(modmetadata_set);
349 for (mdp = start; mdp < stop; mdp++) {
350 if ((*mdp)->md_type != MDT_MODULE)
352 moddata = (*mdp)->md_data;
353 KLD_DPF(FILE, ("Registering module %s in %s\n",
354 moddata->name, lf->filename));
355 error = module_register(moddata, lf);
357 printf("Module %s failed to register: %d\n",
358 moddata->name, error);
359 if (first_error == 0)
363 return (first_error);
367 linker_init_kernel_modules(void)
371 linker_file_register_modules(linker_kernel_file);
375 SYSINIT(linker_kernel, SI_SUB_KLD, SI_ORDER_ANY, linker_init_kernel_modules,
379 linker_load_file(const char *filename, linker_file_t *result)
383 int foundfile, error, modules;
385 /* Refuse to load modules if securelevel raised */
386 if (prison0.pr_securelevel > 0)
389 sx_assert(&kld_sx, SA_XLOCKED);
390 lf = linker_find_file_by_name(filename);
392 KLD_DPF(FILE, ("linker_load_file: file %s is already loaded,"
393 " incrementing refs\n", filename));
402 * We do not need to protect (lock) classes here because there is
403 * no class registration past startup (SI_SUB_KLD, SI_ORDER_ANY)
404 * and there is no class deregistration mechanism at this time.
406 TAILQ_FOREACH(lc, &classes, link) {
407 KLD_DPF(FILE, ("linker_load_file: trying to load %s\n",
409 error = LINKER_LOAD_FILE(lc, filename, &lf);
411 * If we got something other than ENOENT, then it exists but
412 * we cannot load it for some other reason.
417 error = linker_file_register_modules(lf);
418 if (error == EEXIST) {
419 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
422 modules = !TAILQ_EMPTY(&lf->modules);
423 linker_file_register_sysctls(lf);
424 linker_file_sysinit(lf);
425 lf->flags |= LINKER_FILE_LINKED;
428 * If all of the modules in this file failed
429 * to load, unload the file and return an
432 if (modules && TAILQ_EMPTY(&lf->modules)) {
433 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
436 EVENTHANDLER_INVOKE(kld_load, lf);
442 * Less than ideal, but tells the user whether it failed to load or
443 * the module was not found.
448 * If the file type has not been recognized by the last try
449 * printout a message before to fail.
452 printf("linker_load_file: Unsupported file type\n");
455 * Format not recognized or otherwise unloadable.
456 * When loading a module that is statically built into
457 * the kernel EEXIST percolates back up as the return
458 * value. Preserve this so that apps like sysinstall
459 * can recognize this special case and not post bogus
465 error = ENOENT; /* Nothing found */
470 linker_reference_module(const char *modname, struct mod_depend *verinfo,
471 linker_file_t *result)
477 if ((mod = modlist_lookup2(modname, verinfo)) != NULL) {
478 *result = mod->container;
484 error = linker_load_module(NULL, modname, NULL, verinfo, result);
490 linker_release_module(const char *modname, struct mod_depend *verinfo,
498 KASSERT(modname != NULL,
499 ("linker_release_module: no file or name"));
500 mod = modlist_lookup2(modname, verinfo);
507 KASSERT(modname == NULL && verinfo == NULL,
508 ("linker_release_module: both file and name"));
509 error = linker_file_unload(lf, LINKER_UNLOAD_NORMAL);
515 linker_find_file_by_name(const char *filename)
520 koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK);
521 sprintf(koname, "%s.ko", filename);
523 sx_assert(&kld_sx, SA_XLOCKED);
524 TAILQ_FOREACH(lf, &linker_files, link) {
525 if (strcmp(lf->filename, koname) == 0)
527 if (strcmp(lf->filename, filename) == 0)
530 free(koname, M_LINKER);
535 linker_find_file_by_id(int fileid)
539 sx_assert(&kld_sx, SA_XLOCKED);
540 TAILQ_FOREACH(lf, &linker_files, link)
541 if (lf->id == fileid && lf->flags & LINKER_FILE_LINKED)
547 linker_file_foreach(linker_predicate_t *predicate, void *context)
553 TAILQ_FOREACH(lf, &linker_files, link) {
554 retval = predicate(lf, context);
563 linker_make_file(const char *pathname, linker_class_t lc)
566 const char *filename;
569 sx_assert(&kld_sx, SA_XLOCKED);
570 filename = linker_basename(pathname);
572 KLD_DPF(FILE, ("linker_make_file: new file, filename='%s' for pathname='%s'\n", filename, pathname));
573 lf = (linker_file_t)kobj_create((kobj_class_t)lc, M_LINKER, M_WAITOK);
579 lf->filename = strdup(filename, M_LINKER);
580 lf->pathname = strdup(pathname, M_LINKER);
581 LINKER_GET_NEXT_FILE_ID(lf->id);
584 lf->loadcnt = ++loadcnt;
585 STAILQ_INIT(&lf->common);
586 TAILQ_INIT(&lf->modules);
587 TAILQ_INSERT_TAIL(&linker_files, lf, link);
592 linker_file_unload(linker_file_t file, int flags)
595 modlist_t ml, nextml;
596 struct common_symbol *cp;
599 /* Refuse to unload modules if securelevel raised. */
600 if (prison0.pr_securelevel > 0)
603 sx_assert(&kld_sx, SA_XLOCKED);
604 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
606 /* Easy case of just dropping a reference. */
607 if (file->refs > 1) {
612 /* Give eventhandlers a chance to prevent the unload. */
614 EVENTHANDLER_INVOKE(kld_unload_try, file, &error);
618 KLD_DPF(FILE, ("linker_file_unload: file is unloading,"
619 " informing modules\n"));
622 * Quiesce all the modules to give them a chance to veto the unload.
625 for (mod = TAILQ_FIRST(&file->modules); mod;
626 mod = module_getfnext(mod)) {
628 error = module_quiesce(mod);
629 if (error != 0 && flags != LINKER_UNLOAD_FORCE) {
630 KLD_DPF(FILE, ("linker_file_unload: module %s"
631 " vetoed unload\n", module_getname(mod)));
633 * XXX: Do we need to tell all the quiesced modules
634 * that they can resume work now via a new module
644 * Inform any modules associated with this file that they are
648 for (mod = TAILQ_FIRST(&file->modules); mod; mod = next) {
649 next = module_getfnext(mod);
653 * Give the module a chance to veto the unload.
655 if ((error = module_unload(mod)) != 0) {
658 KLD_DPF(FILE, ("linker_file_unload: module %s"
659 " failed unload\n", module_getname(mod)));
669 TAILQ_FOREACH_SAFE(ml, &found_modules, link, nextml) {
670 if (ml->container == file) {
671 TAILQ_REMOVE(&found_modules, ml, link);
677 * Don't try to run SYSUNINITs if we are unloaded due to a
680 if (file->flags & LINKER_FILE_LINKED) {
681 file->flags &= ~LINKER_FILE_LINKED;
682 linker_file_sysuninit(file);
683 linker_file_unregister_sysctls(file);
685 TAILQ_REMOVE(&linker_files, file, link);
688 for (i = 0; i < file->ndeps; i++)
689 linker_file_unload(file->deps[i], flags);
690 free(file->deps, M_LINKER);
693 while ((cp = STAILQ_FIRST(&file->common)) != NULL) {
694 STAILQ_REMOVE_HEAD(&file->common, link);
700 EVENTHANDLER_INVOKE(kld_unload, file->filename, file->address,
703 if (file->filename) {
704 free(file->filename, M_LINKER);
705 file->filename = NULL;
707 if (file->pathname) {
708 free(file->pathname, M_LINKER);
709 file->pathname = NULL;
711 kobj_delete((kobj_t) file, M_LINKER);
716 linker_ctf_get(linker_file_t file, linker_ctf_t *lc)
718 return (LINKER_CTF_GET(file, lc));
722 linker_file_add_dependency(linker_file_t file, linker_file_t dep)
724 linker_file_t *newdeps;
726 sx_assert(&kld_sx, SA_XLOCKED);
727 file->deps = realloc(file->deps, (file->ndeps + 1) * sizeof(*newdeps),
728 M_LINKER, M_WAITOK | M_ZERO);
729 file->deps[file->ndeps] = dep;
731 KLD_DPF(FILE, ("linker_file_add_dependency:"
732 " adding %s as dependency for %s\n",
733 dep->filename, file->filename));
738 * Locate a linker set and its contents. This is a helper function to avoid
739 * linker_if.h exposure elsewhere. Note: firstp and lastp are really void **.
740 * This function is used in this file so we can avoid having lots of (void **)
744 linker_file_lookup_set(linker_file_t file, const char *name,
745 void *firstp, void *lastp, int *countp)
748 sx_assert(&kld_sx, SA_LOCKED);
749 return (LINKER_LOOKUP_SET(file, name, firstp, lastp, countp));
753 * List all functions in a file.
756 linker_file_function_listall(linker_file_t lf,
757 linker_function_nameval_callback_t callback_func, void *arg)
759 return (LINKER_EACH_FUNCTION_NAMEVAL(lf, callback_func, arg));
763 linker_file_lookup_symbol(linker_file_t file, const char *name, int deps)
768 locked = sx_xlocked(&kld_sx);
771 sym = linker_file_lookup_symbol_internal(file, name, deps);
778 linker_file_lookup_symbol_internal(linker_file_t file, const char *name,
782 linker_symval_t symval;
784 size_t common_size = 0;
787 sx_assert(&kld_sx, SA_XLOCKED);
788 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n",
791 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {
792 LINKER_SYMBOL_VALUES(file, sym, &symval);
793 if (symval.value == 0)
795 * For commons, first look them up in the
796 * dependencies and only allocate space if not found
799 common_size = symval.size;
801 KLD_DPF(SYM, ("linker_file_lookup_symbol: symbol"
802 ".value=%p\n", symval.value));
803 return (symval.value);
807 for (i = 0; i < file->ndeps; i++) {
808 address = linker_file_lookup_symbol_internal(
809 file->deps[i], name, 0);
811 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
812 " deps value=%p\n", address));
817 if (common_size > 0) {
819 * This is a common symbol which was not found in the
820 * dependencies. We maintain a simple common symbol table in
823 struct common_symbol *cp;
825 STAILQ_FOREACH(cp, &file->common, link) {
826 if (strcmp(cp->name, name) == 0) {
827 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
828 " old common value=%p\n", cp->address));
829 return (cp->address);
833 * Round the symbol size up to align.
835 common_size = (common_size + sizeof(int) - 1) & -sizeof(int);
836 cp = malloc(sizeof(struct common_symbol)
837 + common_size + strlen(name) + 1, M_LINKER,
839 cp->address = (caddr_t)(cp + 1);
840 cp->name = cp->address + common_size;
841 strcpy(cp->name, name);
842 bzero(cp->address, common_size);
843 STAILQ_INSERT_TAIL(&file->common, cp, link);
845 KLD_DPF(SYM, ("linker_file_lookup_symbol: new common"
846 " value=%p\n", cp->address));
847 return (cp->address);
849 KLD_DPF(SYM, ("linker_file_lookup_symbol: fail\n"));
854 * Both DDB and stack(9) rely on the kernel linker to provide forward and
855 * backward lookup of symbols. However, DDB and sometimes stack(9) need to
856 * do this in a lockfree manner. We provide a set of internal helper
857 * routines to perform these operations without locks, and then wrappers that
860 * linker_debug_lookup() is ifdef DDB as currently it's only used by DDB.
864 linker_debug_lookup(const char *symstr, c_linker_sym_t *sym)
868 TAILQ_FOREACH(lf, &linker_files, link) {
869 if (LINKER_LOOKUP_SYMBOL(lf, symstr, sym) == 0)
877 linker_debug_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
880 c_linker_sym_t best, es;
881 u_long diff, bestdiff, off;
884 off = (uintptr_t)value;
886 TAILQ_FOREACH(lf, &linker_files, link) {
887 if (LINKER_SEARCH_SYMBOL(lf, value, &es, &diff) != 0)
889 if (es != 0 && diff < bestdiff) {
908 linker_debug_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
912 TAILQ_FOREACH(lf, &linker_files, link) {
913 if (LINKER_SYMBOL_VALUES(lf, sym, symval) == 0)
920 linker_debug_search_symbol_name(caddr_t value, char *buf, u_int buflen,
923 linker_symval_t symval;
928 error = linker_debug_search_symbol(value, &sym, offset);
931 error = linker_debug_symbol_values(sym, &symval);
934 strlcpy(buf, symval.name, buflen);
939 * DDB Helpers. DDB has to look across multiple files with their own symbol
940 * tables and string tables.
942 * Note that we do not obey list locking protocols here. We really don't need
943 * DDB to hang because somebody's got the lock held. We'll take the chance
944 * that the files list is inconsistant instead.
948 linker_ddb_lookup(const char *symstr, c_linker_sym_t *sym)
951 return (linker_debug_lookup(symstr, sym));
956 linker_ddb_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
959 return (linker_debug_search_symbol(value, sym, diffp));
963 linker_ddb_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
966 return (linker_debug_symbol_values(sym, symval));
970 linker_ddb_search_symbol_name(caddr_t value, char *buf, u_int buflen,
974 return (linker_debug_search_symbol_name(value, buf, buflen, offset));
978 * stack(9) helper for non-debugging environemnts. Unlike DDB helpers, we do
979 * obey locking protocols, and offer a significantly less complex interface.
982 linker_search_symbol_name(caddr_t value, char *buf, u_int buflen,
988 error = linker_debug_search_symbol_name(value, buf, buflen, offset);
997 kern_kldload(struct thread *td, const char *file, int *fileid)
999 const char *kldname, *modname;
1003 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1006 if ((error = priv_check(td, PRIV_KLD_LOAD)) != 0)
1010 * It is possible that kldloaded module will attach a new ifnet,
1011 * so vnet context must be set when this ocurs.
1013 CURVNET_SET(TD_TO_VNET(td));
1016 * If file does not contain a qualified name or any dot in it
1017 * (kldname.ko, or kldname.ver.ko) treat it as an interface
1020 if (strchr(file, '/') || strchr(file, '.')) {
1029 error = linker_load_module(kldname, modname, NULL, NULL, &lf);
1031 sx_xunlock(&kld_sx);
1037 sx_xunlock(&kld_sx);
1045 sys_kldload(struct thread *td, struct kldload_args *uap)
1047 char *pathname = NULL;
1050 td->td_retval[0] = -1;
1052 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1053 error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL);
1055 error = kern_kldload(td, pathname, &fileid);
1057 td->td_retval[0] = fileid;
1059 free(pathname, M_TEMP);
1064 kern_kldunload(struct thread *td, int fileid, int flags)
1069 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1072 if ((error = priv_check(td, PRIV_KLD_UNLOAD)) != 0)
1075 CURVNET_SET(TD_TO_VNET(td));
1077 lf = linker_find_file_by_id(fileid);
1079 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
1081 if (lf->userrefs == 0) {
1083 * XXX: maybe LINKER_UNLOAD_FORCE should override ?
1085 printf("kldunload: attempt to unload file that was"
1086 " loaded by the kernel\n");
1090 error = linker_file_unload(lf, flags);
1096 sx_xunlock(&kld_sx);
1103 sys_kldunload(struct thread *td, struct kldunload_args *uap)
1106 return (kern_kldunload(td, uap->fileid, LINKER_UNLOAD_NORMAL));
1110 sys_kldunloadf(struct thread *td, struct kldunloadf_args *uap)
1113 if (uap->flags != LINKER_UNLOAD_NORMAL &&
1114 uap->flags != LINKER_UNLOAD_FORCE)
1116 return (kern_kldunload(td, uap->fileid, uap->flags));
1120 sys_kldfind(struct thread *td, struct kldfind_args *uap)
1123 const char *filename;
1128 error = mac_kld_check_stat(td->td_ucred);
1133 td->td_retval[0] = -1;
1135 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1136 if ((error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL)) != 0)
1139 filename = linker_basename(pathname);
1141 lf = linker_find_file_by_name(filename);
1143 td->td_retval[0] = lf->id;
1146 sx_xunlock(&kld_sx);
1148 free(pathname, M_TEMP);
1153 sys_kldnext(struct thread *td, struct kldnext_args *uap)
1159 error = mac_kld_check_stat(td->td_ucred);
1165 if (uap->fileid == 0)
1166 lf = TAILQ_FIRST(&linker_files);
1168 lf = linker_find_file_by_id(uap->fileid);
1173 lf = TAILQ_NEXT(lf, link);
1176 /* Skip partially loaded files. */
1177 while (lf != NULL && !(lf->flags & LINKER_FILE_LINKED))
1178 lf = TAILQ_NEXT(lf, link);
1181 td->td_retval[0] = lf->id;
1183 td->td_retval[0] = 0;
1185 sx_xunlock(&kld_sx);
1190 sys_kldstat(struct thread *td, struct kldstat_args *uap)
1192 struct kld_file_stat stat;
1196 * Check the version of the user's structure.
1198 if ((error = copyin(&uap->stat->version, &version, sizeof(version)))
1201 if (version != sizeof(struct kld_file_stat_1) &&
1202 version != sizeof(struct kld_file_stat))
1205 error = kern_kldstat(td, uap->fileid, &stat);
1208 return (copyout(&stat, uap->stat, version));
1212 kern_kldstat(struct thread *td, int fileid, struct kld_file_stat *stat)
1219 error = mac_kld_check_stat(td->td_ucred);
1225 lf = linker_find_file_by_id(fileid);
1227 sx_xunlock(&kld_sx);
1231 /* Version 1 fields: */
1232 namelen = strlen(lf->filename) + 1;
1233 if (namelen > MAXPATHLEN)
1234 namelen = MAXPATHLEN;
1235 bcopy(lf->filename, &stat->name[0], namelen);
1236 stat->refs = lf->refs;
1238 stat->address = lf->address;
1239 stat->size = lf->size;
1240 /* Version 2 fields: */
1241 namelen = strlen(lf->pathname) + 1;
1242 if (namelen > MAXPATHLEN)
1243 namelen = MAXPATHLEN;
1244 bcopy(lf->pathname, &stat->pathname[0], namelen);
1245 sx_xunlock(&kld_sx);
1247 td->td_retval[0] = 0;
1252 sys_kldfirstmod(struct thread *td, struct kldfirstmod_args *uap)
1259 error = mac_kld_check_stat(td->td_ucred);
1265 lf = linker_find_file_by_id(uap->fileid);
1268 mp = TAILQ_FIRST(&lf->modules);
1270 td->td_retval[0] = module_getid(mp);
1272 td->td_retval[0] = 0;
1276 sx_xunlock(&kld_sx);
1281 sys_kldsym(struct thread *td, struct kldsym_args *uap)
1283 char *symstr = NULL;
1285 linker_symval_t symval;
1287 struct kld_sym_lookup lookup;
1291 error = mac_kld_check_stat(td->td_ucred);
1296 if ((error = copyin(uap->data, &lookup, sizeof(lookup))) != 0)
1298 if (lookup.version != sizeof(lookup) ||
1299 uap->cmd != KLDSYM_LOOKUP)
1301 symstr = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1302 if ((error = copyinstr(lookup.symname, symstr, MAXPATHLEN, NULL)) != 0)
1305 if (uap->fileid != 0) {
1306 lf = linker_find_file_by_id(uap->fileid);
1309 else if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1310 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1311 lookup.symvalue = (uintptr_t) symval.value;
1312 lookup.symsize = symval.size;
1313 error = copyout(&lookup, uap->data, sizeof(lookup));
1317 TAILQ_FOREACH(lf, &linker_files, link) {
1318 if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1319 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1320 lookup.symvalue = (uintptr_t)symval.value;
1321 lookup.symsize = symval.size;
1322 error = copyout(&lookup, uap->data,
1330 sx_xunlock(&kld_sx);
1332 free(symstr, M_TEMP);
1337 * Preloaded module support
1341 modlist_lookup(const char *name, int ver)
1345 TAILQ_FOREACH(mod, &found_modules, link) {
1346 if (strcmp(mod->name, name) == 0 &&
1347 (ver == 0 || mod->version == ver))
1354 modlist_lookup2(const char *name, struct mod_depend *verinfo)
1356 modlist_t mod, bestmod;
1359 if (verinfo == NULL)
1360 return (modlist_lookup(name, 0));
1362 TAILQ_FOREACH(mod, &found_modules, link) {
1363 if (strcmp(mod->name, name) != 0)
1366 if (ver == verinfo->md_ver_preferred)
1368 if (ver >= verinfo->md_ver_minimum &&
1369 ver <= verinfo->md_ver_maximum &&
1370 (bestmod == NULL || ver > bestmod->version))
1377 modlist_newmodule(const char *modname, int version, linker_file_t container)
1381 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT | M_ZERO);
1383 panic("no memory for module list");
1384 mod->container = container;
1385 mod->name = modname;
1386 mod->version = version;
1387 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1392 linker_addmodules(linker_file_t lf, struct mod_metadata **start,
1393 struct mod_metadata **stop, int preload)
1395 struct mod_metadata *mp, **mdp;
1396 const char *modname;
1399 for (mdp = start; mdp < stop; mdp++) {
1401 if (mp->md_type != MDT_VERSION)
1403 modname = mp->md_cval;
1404 ver = ((struct mod_version *)mp->md_data)->mv_version;
1405 if (modlist_lookup(modname, ver) != NULL) {
1406 printf("module %s already present!\n", modname);
1407 /* XXX what can we do? this is a build error. :-( */
1410 modlist_newmodule(modname, ver, lf);
1415 linker_preload(void *arg)
1418 const char *modname, *nmodname;
1420 linker_file_t lf, nlf;
1423 linker_file_list_t loaded_files;
1424 linker_file_list_t depended_files;
1425 struct mod_metadata *mp, *nmp;
1426 struct mod_metadata **start, **stop, **mdp, **nmdp;
1427 struct mod_depend *verinfo;
1431 struct sysinit **si_start, **si_stop;
1433 TAILQ_INIT(&loaded_files);
1434 TAILQ_INIT(&depended_files);
1435 TAILQ_INIT(&found_modules);
1440 while ((modptr = preload_search_next_name(modptr)) != NULL) {
1441 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
1442 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
1443 if (modname == NULL) {
1444 printf("Preloaded module at %p does not have a"
1445 " name!\n", modptr);
1448 if (modtype == NULL) {
1449 printf("Preloaded module at %p does not have a type!\n",
1454 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname,
1457 TAILQ_FOREACH(lc, &classes, link) {
1458 error = LINKER_LINK_PRELOAD(lc, modname, &lf);
1464 TAILQ_INSERT_TAIL(&loaded_files, lf, loaded);
1468 * First get a list of stuff in the kernel.
1470 if (linker_file_lookup_set(linker_kernel_file, MDT_SETNAME, &start,
1472 linker_addmodules(linker_kernel_file, start, stop, 1);
1475 * This is a once-off kinky bubble sort to resolve relocation
1476 * dependency requirements.
1479 TAILQ_FOREACH(lf, &loaded_files, loaded) {
1480 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1483 * First, look to see if we would successfully link with this
1486 resolves = 1; /* unless we know otherwise */
1488 for (mdp = start; mdp < stop; mdp++) {
1490 if (mp->md_type != MDT_DEPEND)
1492 modname = mp->md_cval;
1493 verinfo = mp->md_data;
1494 for (nmdp = start; nmdp < stop; nmdp++) {
1496 if (nmp->md_type != MDT_VERSION)
1498 nmodname = nmp->md_cval;
1499 if (strcmp(modname, nmodname) == 0)
1502 if (nmdp < stop) /* it's a self reference */
1506 * ok, the module isn't here yet, we
1509 if (modlist_lookup2(modname, verinfo) == NULL)
1514 * OK, if we found our modules, we can link. So, "provide"
1515 * the modules inside and add it to the end of the link order
1520 for (mdp = start; mdp < stop; mdp++) {
1522 if (mp->md_type != MDT_VERSION)
1524 modname = mp->md_cval;
1525 nver = ((struct mod_version *)
1526 mp->md_data)->mv_version;
1527 if (modlist_lookup(modname,
1529 printf("module %s already"
1530 " present!\n", modname);
1531 TAILQ_REMOVE(&loaded_files,
1533 linker_file_unload(lf,
1534 LINKER_UNLOAD_FORCE);
1535 /* we changed tailq next ptr */
1538 modlist_newmodule(modname, nver, lf);
1541 TAILQ_REMOVE(&loaded_files, lf, loaded);
1542 TAILQ_INSERT_TAIL(&depended_files, lf, loaded);
1544 * Since we provided modules, we need to restart the
1545 * sort so that the previous files that depend on us
1546 * have a chance. Also, we've busted the tailq next
1547 * pointer with the REMOVE.
1554 * At this point, we check to see what could not be resolved..
1556 while ((lf = TAILQ_FIRST(&loaded_files)) != NULL) {
1557 TAILQ_REMOVE(&loaded_files, lf, loaded);
1558 printf("KLD file %s is missing dependencies\n", lf->filename);
1559 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1563 * We made it. Finish off the linking in the order we determined.
1565 TAILQ_FOREACH_SAFE(lf, &depended_files, loaded, nlf) {
1566 if (linker_kernel_file) {
1567 linker_kernel_file->refs++;
1568 error = linker_file_add_dependency(lf,
1569 linker_kernel_file);
1571 panic("cannot add dependency");
1573 lf->userrefs++; /* so we can (try to) kldunload it */
1574 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1577 for (mdp = start; mdp < stop; mdp++) {
1579 if (mp->md_type != MDT_DEPEND)
1581 modname = mp->md_cval;
1582 verinfo = mp->md_data;
1583 mod = modlist_lookup2(modname, verinfo);
1585 printf("KLD file %s - cannot find "
1586 "dependency \"%s\"\n",
1587 lf->filename, modname);
1590 /* Don't count self-dependencies */
1591 if (lf == mod->container)
1593 mod->container->refs++;
1594 error = linker_file_add_dependency(lf,
1597 panic("cannot add dependency");
1601 * Now do relocation etc using the symbol search paths
1602 * established by the dependencies
1604 error = LINKER_LINK_PRELOAD_FINISH(lf);
1606 printf("KLD file %s - could not finalize loading\n",
1610 linker_file_register_modules(lf);
1611 if (linker_file_lookup_set(lf, "sysinit_set", &si_start,
1612 &si_stop, NULL) == 0)
1613 sysinit_add(si_start, si_stop);
1614 linker_file_register_sysctls(lf);
1615 lf->flags |= LINKER_FILE_LINKED;
1618 TAILQ_REMOVE(&depended_files, lf, loaded);
1619 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1621 sx_xunlock(&kld_sx);
1622 /* woohoo! we made it! */
1625 SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
1628 * Search for a not-loaded module by name.
1630 * Modules may be found in the following locations:
1632 * - preloaded (result is just the module name) - on disk (result is full path
1635 * If the module name is qualified in any way (contains path, etc.) the we
1636 * simply return a copy of it.
1638 * The search path can be manipulated via sysctl. Note that we use the ';'
1639 * character as a separator to be consistent with the bootloader.
1642 static char linker_hintfile[] = "linker.hints";
1643 static char linker_path[MAXPATHLEN] = "/boot/kernel;/boot/modules";
1645 SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RWTUN, linker_path,
1646 sizeof(linker_path), "module load search path");
1648 TUNABLE_STR("module_path", linker_path, sizeof(linker_path));
1650 static char *linker_ext_list[] = {
1657 * Check if file actually exists either with or without extension listed in
1658 * the linker_ext_list. (probably should be generic for the rest of the
1662 linker_lookup_file(const char *path, int pathlen, const char *name,
1663 int namelen, struct vattr *vap)
1665 struct nameidata nd;
1666 struct thread *td = curthread; /* XXX */
1667 char *result, **cpp, *sep;
1668 int error, len, extlen, reclen, flags;
1672 for (cpp = linker_ext_list; *cpp; cpp++) {
1677 extlen++; /* trailing '\0' */
1678 sep = (path[pathlen - 1] != '/') ? "/" : "";
1680 reclen = pathlen + strlen(sep) + namelen + extlen + 1;
1681 result = malloc(reclen, M_LINKER, M_WAITOK);
1682 for (cpp = linker_ext_list; *cpp; cpp++) {
1683 snprintf(result, reclen, "%.*s%s%.*s%s", pathlen, path, sep,
1684 namelen, name, *cpp);
1686 * Attempt to open the file, and return the path if
1687 * we succeed and it's a regular file.
1689 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, result, td);
1691 error = vn_open(&nd, &flags, 0, NULL);
1693 NDFREE(&nd, NDF_ONLY_PNBUF);
1694 type = nd.ni_vp->v_type;
1696 VOP_GETATTR(nd.ni_vp, vap, td->td_ucred);
1697 VOP_UNLOCK(nd.ni_vp, 0);
1698 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
1703 free(result, M_LINKER);
1707 #define INT_ALIGN(base, ptr) ptr = \
1708 (base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
1711 * Lookup KLD which contains requested module in the "linker.hints" file. If
1712 * version specification is available, then try to find the best KLD.
1713 * Otherwise just find the latest one.
1716 linker_hints_lookup(const char *path, int pathlen, const char *modname,
1717 int modnamelen, struct mod_depend *verinfo)
1719 struct thread *td = curthread; /* XXX */
1720 struct ucred *cred = td ? td->td_ucred : NULL;
1721 struct nameidata nd;
1722 struct vattr vattr, mattr;
1723 u_char *hints = NULL;
1724 u_char *cp, *recptr, *bufend, *result, *best, *pathbuf, *sep;
1725 int error, ival, bestver, *intp, found, flags, clen, blen;
1729 bestver = found = 0;
1731 sep = (path[pathlen - 1] != '/') ? "/" : "";
1732 reclen = imax(modnamelen, strlen(linker_hintfile)) + pathlen +
1734 pathbuf = malloc(reclen, M_LINKER, M_WAITOK);
1735 snprintf(pathbuf, reclen, "%.*s%s%s", pathlen, path, sep,
1738 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, pathbuf, td);
1740 error = vn_open(&nd, &flags, 0, NULL);
1743 NDFREE(&nd, NDF_ONLY_PNBUF);
1744 if (nd.ni_vp->v_type != VREG)
1747 error = VOP_GETATTR(nd.ni_vp, &vattr, cred);
1751 * XXX: we need to limit this number to some reasonable value
1753 if (vattr.va_size > 100 * 1024) {
1754 printf("hints file too large %ld\n", (long)vattr.va_size);
1757 hints = malloc(vattr.va_size, M_TEMP, M_WAITOK);
1760 error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t)hints, vattr.va_size, 0,
1761 UIO_SYSSPACE, IO_NODELOCKED, cred, NOCRED, &reclen, td);
1764 VOP_UNLOCK(nd.ni_vp, 0);
1765 vn_close(nd.ni_vp, FREAD, cred, td);
1768 printf("can't read %zd\n", reclen);
1771 intp = (int *)hints;
1773 if (ival != LINKER_HINTS_VERSION) {
1774 printf("hints file version mismatch %d\n", ival);
1777 bufend = hints + vattr.va_size;
1778 recptr = (u_char *)intp;
1780 while (recptr < bufend && !found) {
1781 intp = (int *)recptr;
1788 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
1791 INT_ALIGN(hints, cp);
1795 if (verinfo == NULL ||
1796 ival == verinfo->md_ver_preferred) {
1800 if (ival >= verinfo->md_ver_minimum &&
1801 ival <= verinfo->md_ver_maximum &&
1811 recptr += reclen + sizeof(int);
1814 * Finally check if KLD is in the place
1817 result = linker_lookup_file(path, pathlen, cp, clen, &mattr);
1819 result = linker_lookup_file(path, pathlen, best, blen, &mattr);
1822 * KLD is newer than hints file. What we should do now?
1824 if (result && timespeccmp(&mattr.va_mtime, &vattr.va_mtime, >))
1825 printf("warning: KLD '%s' is newer than the linker.hints"
1828 free(pathbuf, M_LINKER);
1830 free(hints, M_TEMP);
1831 if (nd.ni_vp != NULL) {
1832 VOP_UNLOCK(nd.ni_vp, 0);
1833 vn_close(nd.ni_vp, FREAD, cred, td);
1836 * If nothing found or hints is absent - fallback to the old
1837 * way by using "kldname[.ko]" as module name.
1839 if (!found && !bestver && result == NULL)
1840 result = linker_lookup_file(path, pathlen, modname,
1846 * Lookup KLD which contains requested module in the all directories.
1849 linker_search_module(const char *modname, int modnamelen,
1850 struct mod_depend *verinfo)
1852 char *cp, *ep, *result;
1855 * traverse the linker path
1857 for (cp = linker_path; *cp; cp = ep + 1) {
1858 /* find the end of this component */
1859 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++);
1860 result = linker_hints_lookup(cp, ep - cp, modname,
1861 modnamelen, verinfo);
1871 * Search for module in all directories listed in the linker_path.
1874 linker_search_kld(const char *name)
1876 char *cp, *ep, *result;
1879 /* qualified at all? */
1880 if (strchr(name, '/'))
1881 return (strdup(name, M_LINKER));
1883 /* traverse the linker path */
1885 for (ep = linker_path; *ep; ep++) {
1887 /* find the end of this component */
1888 for (; *ep != 0 && *ep != ';'; ep++);
1889 result = linker_lookup_file(cp, ep - cp, name, len, NULL);
1897 linker_basename(const char *path)
1899 const char *filename;
1901 filename = strrchr(path, '/');
1902 if (filename == NULL)
1911 * Inform hwpmc about the set of kernel modules currently loaded.
1914 linker_hwpmc_list_objects(void)
1917 struct pmckern_map_in *kobase;
1922 TAILQ_FOREACH(lf, &linker_files, link)
1925 /* Allocate nmappings + 1 entries. */
1926 kobase = malloc((nmappings + 1) * sizeof(struct pmckern_map_in),
1927 M_LINKER, M_WAITOK | M_ZERO);
1929 TAILQ_FOREACH(lf, &linker_files, link) {
1931 /* Save the info for this linker file. */
1932 kobase[i].pm_file = lf->filename;
1933 kobase[i].pm_address = (uintptr_t)lf->address;
1936 sx_sunlock(&kld_sx);
1938 KASSERT(i > 0, ("linker_hpwmc_list_objects: no kernel objects?"));
1940 /* The last entry of the malloced area comprises of all zeros. */
1941 KASSERT(kobase[i].pm_file == NULL,
1942 ("linker_hwpmc_list_objects: last object not NULL"));
1944 return ((void *)kobase);
1949 * Find a file which contains given module and load it, if "parent" is not
1950 * NULL, register a reference to it.
1953 linker_load_module(const char *kldname, const char *modname,
1954 struct linker_file *parent, struct mod_depend *verinfo,
1955 struct linker_file **lfpp)
1957 linker_file_t lfdep;
1958 const char *filename;
1962 sx_assert(&kld_sx, SA_XLOCKED);
1963 if (modname == NULL) {
1965 * We have to load KLD
1967 KASSERT(verinfo == NULL, ("linker_load_module: verinfo"
1969 pathname = linker_search_kld(kldname);
1971 if (modlist_lookup2(modname, verinfo) != NULL)
1973 if (kldname != NULL)
1974 pathname = strdup(kldname, M_LINKER);
1975 else if (rootvnode == NULL)
1979 * Need to find a KLD with required module
1981 pathname = linker_search_module(modname,
1982 strlen(modname), verinfo);
1984 if (pathname == NULL)
1988 * Can't load more than one file with the same basename XXX:
1989 * Actually it should be possible to have multiple KLDs with
1990 * the same basename but different path because they can
1991 * provide different versions of the same modules.
1993 filename = linker_basename(pathname);
1994 if (linker_find_file_by_name(filename))
1997 error = linker_load_file(pathname, &lfdep);
2000 if (modname && verinfo &&
2001 modlist_lookup2(modname, verinfo) == NULL) {
2002 linker_file_unload(lfdep, LINKER_UNLOAD_FORCE);
2007 error = linker_file_add_dependency(parent, lfdep);
2014 free(pathname, M_LINKER);
2019 * This routine is responsible for finding dependencies of userland initiated
2020 * kldload(2)'s of files.
2023 linker_load_dependencies(linker_file_t lf)
2025 linker_file_t lfdep;
2026 struct mod_metadata **start, **stop, **mdp, **nmdp;
2027 struct mod_metadata *mp, *nmp;
2028 struct mod_depend *verinfo;
2030 const char *modname, *nmodname;
2031 int ver, error = 0, count;
2034 * All files are dependant on /kernel.
2036 sx_assert(&kld_sx, SA_XLOCKED);
2037 if (linker_kernel_file) {
2038 linker_kernel_file->refs++;
2039 error = linker_file_add_dependency(lf, linker_kernel_file);
2043 if (linker_file_lookup_set(lf, MDT_SETNAME, &start, &stop,
2046 for (mdp = start; mdp < stop; mdp++) {
2048 if (mp->md_type != MDT_VERSION)
2050 modname = mp->md_cval;
2051 ver = ((struct mod_version *)mp->md_data)->mv_version;
2052 mod = modlist_lookup(modname, ver);
2054 printf("interface %s.%d already present in the KLD"
2055 " '%s'!\n", modname, ver,
2056 mod->container->filename);
2061 for (mdp = start; mdp < stop; mdp++) {
2063 if (mp->md_type != MDT_DEPEND)
2065 modname = mp->md_cval;
2066 verinfo = mp->md_data;
2068 for (nmdp = start; nmdp < stop; nmdp++) {
2070 if (nmp->md_type != MDT_VERSION)
2072 nmodname = nmp->md_cval;
2073 if (strcmp(modname, nmodname) == 0)
2076 if (nmdp < stop)/* early exit, it's a self reference */
2078 mod = modlist_lookup2(modname, verinfo);
2079 if (mod) { /* woohoo, it's loaded already */
2080 lfdep = mod->container;
2082 error = linker_file_add_dependency(lf, lfdep);
2087 error = linker_load_module(NULL, modname, lf, verinfo, NULL);
2089 printf("KLD %s: depends on %s - not available or"
2090 " version mismatch\n", lf->filename, modname);
2097 linker_addmodules(lf, start, stop, 0);
2102 sysctl_kern_function_list_iterate(const char *name, void *opaque)
2104 struct sysctl_req *req;
2107 return (SYSCTL_OUT(req, name, strlen(name) + 1));
2111 * Export a nul-separated, double-nul-terminated list of all function names
2115 sysctl_kern_function_list(SYSCTL_HANDLER_ARGS)
2121 error = mac_kld_check_stat(req->td->td_ucred);
2125 error = sysctl_wire_old_buffer(req, 0);
2129 TAILQ_FOREACH(lf, &linker_files, link) {
2130 error = LINKER_EACH_FUNCTION_NAME(lf,
2131 sysctl_kern_function_list_iterate, req);
2133 sx_xunlock(&kld_sx);
2137 sx_xunlock(&kld_sx);
2138 return (SYSCTL_OUT(req, "", 1));
2141 SYSCTL_PROC(_kern, OID_AUTO, function_list, CTLTYPE_OPAQUE | CTLFLAG_RD,
2142 NULL, 0, sysctl_kern_function_list, "", "kernel function list");