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("$FreeBSD$");
31 #include "opt_hwpmc_hooks.h"
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/malloc.h>
37 #include <sys/sysproto.h>
38 #include <sys/sysent.h>
42 #include <sys/mutex.h>
44 #include <sys/module.h>
45 #include <sys/mount.h>
46 #include <sys/linker.h>
47 #include <sys/fcntl.h>
49 #include <sys/libkern.h>
50 #include <sys/namei.h>
51 #include <sys/vnode.h>
52 #include <sys/syscallsubr.h>
53 #include <sys/sysctl.h>
54 #include <sys/vimage.h>
56 #include <security/mac/mac_framework.h>
58 #include "linker_if.h"
61 #include <sys/pmckern.h>
68 #define KLD_LOCK() sx_xlock(&kld_sx)
69 #define KLD_UNLOCK() sx_xunlock(&kld_sx)
70 #define KLD_LOCKED() sx_xlocked(&kld_sx)
71 #define KLD_LOCK_ASSERT() do { \
73 sx_assert(&kld_sx, SX_XLOCKED); \
77 * static char *linker_search_path(const char *name, struct mod_depend
80 static const char *linker_basename(const char *path);
83 * Find a currently loaded file given its filename.
85 static linker_file_t linker_find_file_by_name(const char* _filename);
88 * Find a currently loaded file given its file id.
90 static linker_file_t linker_find_file_by_id(int _fileid);
92 /* Metadata from the static kernel */
93 SET_DECLARE(modmetadata_set, struct mod_metadata);
95 MALLOC_DEFINE(M_LINKER, "linker", "kernel linker");
97 linker_file_t linker_kernel_file;
99 static struct sx kld_sx; /* kernel linker lock */
102 * Load counter used by clients to determine if a linker file has been
103 * re-loaded. This counter is incremented for each file load.
107 static linker_class_list_t classes;
108 static linker_file_list_t linker_files;
109 static int next_file_id = 1;
110 static int linker_no_more_classes = 0;
112 #define LINKER_GET_NEXT_FILE_ID(a) do { \
113 linker_file_t lftmp; \
117 TAILQ_FOREACH(lftmp, &linker_files, link) { \
118 if (next_file_id == lftmp->id) { \
123 (a) = next_file_id; \
127 /* XXX wrong name; we're looking at version provision tags here, not modules */
128 typedef TAILQ_HEAD(, modlist) modlisthead_t;
130 TAILQ_ENTRY(modlist) link; /* chain together all modules */
131 linker_file_t container;
135 typedef struct modlist *modlist_t;
136 static modlisthead_t found_modules;
138 static int linker_file_add_dependency(linker_file_t file,
140 static caddr_t linker_file_lookup_symbol_internal(linker_file_t file,
141 const char* name, int deps);
142 static int linker_load_module(const char *kldname,
143 const char *modname, struct linker_file *parent,
144 struct mod_depend *verinfo, struct linker_file **lfpp);
145 static modlist_t modlist_lookup2(const char *name, struct mod_depend *verinfo);
148 linker_strdup(const char *str)
152 if ((result = malloc((strlen(str) + 1), M_LINKER, M_WAITOK)) != NULL)
158 linker_init(void *arg)
161 sx_init(&kld_sx, "kernel linker");
162 TAILQ_INIT(&classes);
163 TAILQ_INIT(&linker_files);
166 SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
169 linker_stop_class_add(void *arg)
172 linker_no_more_classes = 1;
175 SYSINIT(linker_class, SI_SUB_KLD, SI_ORDER_ANY, linker_stop_class_add, NULL);
178 linker_add_class(linker_class_t lc)
182 * We disallow any class registration past SI_ORDER_ANY
183 * of SI_SUB_KLD. We bump the reference count to keep the
184 * ops from being freed.
186 if (linker_no_more_classes == 1)
188 kobj_class_compile((kobj_class_t) lc);
189 ((kobj_class_t)lc)->refs++; /* XXX: kobj_mtx */
190 TAILQ_INSERT_TAIL(&classes, lc, link);
195 linker_file_sysinit(linker_file_t lf)
197 struct sysinit **start, **stop, **sipp, **xipp, *save;
199 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
202 if (linker_file_lookup_set(lf, "sysinit_set", &start, &stop, NULL) != 0)
205 * Perform a bubble sort of the system initialization objects by
206 * their subsystem (primary key) and order (secondary key).
208 * Since some things care about execution order, this is the operation
209 * which ensures continued function.
211 for (sipp = start; sipp < stop; sipp++) {
212 for (xipp = sipp + 1; xipp < stop; xipp++) {
213 if ((*sipp)->subsystem < (*xipp)->subsystem ||
214 ((*sipp)->subsystem == (*xipp)->subsystem &&
215 (*sipp)->order <= (*xipp)->order))
224 * Traverse the (now) ordered list of system initialization tasks.
225 * Perform each task, and continue on to the next task.
228 for (sipp = start; sipp < stop; sipp++) {
229 if ((*sipp)->subsystem == SI_SUB_DUMMY)
230 continue; /* skip dummy task(s) */
233 (*((*sipp)->func)) ((*sipp)->udata);
239 linker_file_sysuninit(linker_file_t lf)
241 struct sysinit **start, **stop, **sipp, **xipp, *save;
243 KLD_DPF(FILE, ("linker_file_sysuninit: calling SYSUNINITs for %s\n",
246 if (linker_file_lookup_set(lf, "sysuninit_set", &start, &stop,
251 * Perform a reverse bubble sort of the system initialization objects
252 * by their subsystem (primary key) and order (secondary key).
254 * Since some things care about execution order, this is the operation
255 * which ensures continued function.
257 for (sipp = start; sipp < stop; sipp++) {
258 for (xipp = sipp + 1; xipp < stop; xipp++) {
259 if ((*sipp)->subsystem > (*xipp)->subsystem ||
260 ((*sipp)->subsystem == (*xipp)->subsystem &&
261 (*sipp)->order >= (*xipp)->order))
270 * Traverse the (now) ordered list of system initialization tasks.
271 * Perform each task, and continue on to the next task.
274 for (sipp = start; sipp < stop; sipp++) {
275 if ((*sipp)->subsystem == SI_SUB_DUMMY)
276 continue; /* skip dummy task(s) */
279 (*((*sipp)->func)) ((*sipp)->udata);
285 linker_file_register_sysctls(linker_file_t lf)
287 struct sysctl_oid **start, **stop, **oidp;
290 ("linker_file_register_sysctls: registering SYSCTLs for %s\n",
293 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
297 for (oidp = start; oidp < stop; oidp++)
298 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: registering SYSCTLs"
308 " for %s\n", lf->filename));
310 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
314 for (oidp = start; oidp < stop; oidp++)
315 sysctl_unregister_oid(*oidp);
320 linker_file_register_modules(linker_file_t lf)
322 struct mod_metadata **start, **stop, **mdp;
323 const moduledata_t *moddata;
324 int first_error, error;
326 KLD_DPF(FILE, ("linker_file_register_modules: registering modules"
327 " in %s\n", lf->filename));
329 if (linker_file_lookup_set(lf, "modmetadata_set", &start,
332 * This fallback should be unnecessary, but if we get booted
333 * from boot2 instead of loader and we are missing our
334 * metadata then we have to try the best we can.
336 if (lf == linker_kernel_file) {
337 start = SET_BEGIN(modmetadata_set);
338 stop = SET_LIMIT(modmetadata_set);
343 for (mdp = start; mdp < stop; mdp++) {
344 if ((*mdp)->md_type != MDT_MODULE)
346 moddata = (*mdp)->md_data;
347 KLD_DPF(FILE, ("Registering module %s in %s\n",
348 moddata->name, lf->filename));
349 error = module_register(moddata, lf);
351 printf("Module %s failed to register: %d\n",
352 moddata->name, error);
353 if (first_error == 0)
357 return (first_error);
361 linker_init_kernel_modules(void)
364 linker_file_register_modules(linker_kernel_file);
367 SYSINIT(linker_kernel, SI_SUB_KLD, SI_ORDER_ANY, linker_init_kernel_modules,
371 linker_load_file(const char *filename, linker_file_t *result)
375 int foundfile, error;
377 /* Refuse to load modules if securelevel raised */
378 if (prison0.pr_securelevel > 0)
382 lf = linker_find_file_by_name(filename);
384 KLD_DPF(FILE, ("linker_load_file: file %s is already loaded,"
385 " incrementing refs\n", filename));
394 * We do not need to protect (lock) classes here because there is
395 * no class registration past startup (SI_SUB_KLD, SI_ORDER_ANY)
396 * and there is no class deregistration mechanism at this time.
398 TAILQ_FOREACH(lc, &classes, link) {
399 KLD_DPF(FILE, ("linker_load_file: trying to load %s\n",
401 error = LINKER_LOAD_FILE(lc, filename, &lf);
403 * If we got something other than ENOENT, then it exists but
404 * we cannot load it for some other reason.
409 error = linker_file_register_modules(lf);
410 if (error == EEXIST) {
411 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
415 linker_file_register_sysctls(lf);
416 linker_file_sysinit(lf);
418 lf->flags |= LINKER_FILE_LINKED;
424 * Less than ideal, but tells the user whether it failed to load or
425 * the module was not found.
430 * If the file type has not been recognized by the last try
431 * printout a message before to fail.
434 printf("linker_load_file: Unsupported file type\n");
437 * Format not recognized or otherwise unloadable.
438 * When loading a module that is statically built into
439 * the kernel EEXIST percolates back up as the return
440 * value. Preserve this so that apps like sysinstall
441 * can recognize this special case and not post bogus
447 error = ENOENT; /* Nothing found */
452 linker_reference_module(const char *modname, struct mod_depend *verinfo,
453 linker_file_t *result)
459 if ((mod = modlist_lookup2(modname, verinfo)) != NULL) {
460 *result = mod->container;
466 error = linker_load_module(NULL, modname, NULL, verinfo, result);
472 linker_release_module(const char *modname, struct mod_depend *verinfo,
480 KASSERT(modname != NULL,
481 ("linker_release_module: no file or name"));
482 mod = modlist_lookup2(modname, verinfo);
489 KASSERT(modname == NULL && verinfo == NULL,
490 ("linker_release_module: both file and name"));
491 error = linker_file_unload(lf, LINKER_UNLOAD_NORMAL);
497 linker_find_file_by_name(const char *filename)
502 koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK);
503 sprintf(koname, "%s.ko", filename);
506 TAILQ_FOREACH(lf, &linker_files, link) {
507 if (strcmp(lf->filename, koname) == 0)
509 if (strcmp(lf->filename, filename) == 0)
512 free(koname, M_LINKER);
517 linker_find_file_by_id(int fileid)
522 TAILQ_FOREACH(lf, &linker_files, link)
523 if (lf->id == fileid && lf->flags & LINKER_FILE_LINKED)
529 linker_file_foreach(linker_predicate_t *predicate, void *context)
535 TAILQ_FOREACH(lf, &linker_files, link) {
536 retval = predicate(lf, context);
545 linker_make_file(const char *pathname, linker_class_t lc)
548 const char *filename;
551 filename = linker_basename(pathname);
553 KLD_DPF(FILE, ("linker_make_file: new file, filename='%s' for pathname='%s'\n", filename, pathname));
554 lf = (linker_file_t)kobj_create((kobj_class_t)lc, M_LINKER, M_WAITOK);
560 lf->filename = linker_strdup(filename);
561 lf->pathname = linker_strdup(pathname);
562 LINKER_GET_NEXT_FILE_ID(lf->id);
565 lf->loadcnt = ++loadcnt;
566 lf->sdt_probes = NULL;
568 STAILQ_INIT(&lf->common);
569 TAILQ_INIT(&lf->modules);
570 TAILQ_INSERT_TAIL(&linker_files, lf, link);
575 linker_file_unload(linker_file_t file, int flags)
578 modlist_t ml, nextml;
579 struct common_symbol *cp;
582 /* Refuse to unload modules if securelevel raised. */
583 if (prison0.pr_securelevel > 0)
587 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
589 /* Easy case of just dropping a reference. */
590 if (file->refs > 1) {
595 KLD_DPF(FILE, ("linker_file_unload: file is unloading,"
596 " informing modules\n"));
599 * Quiesce all the modules to give them a chance to veto the unload.
602 for (mod = TAILQ_FIRST(&file->modules); mod;
603 mod = module_getfnext(mod)) {
605 error = module_quiesce(mod);
606 if (error != 0 && flags != LINKER_UNLOAD_FORCE) {
607 KLD_DPF(FILE, ("linker_file_unload: module %s"
608 " vetoed unload\n", module_getname(mod)));
610 * XXX: Do we need to tell all the quiesced modules
611 * that they can resume work now via a new module
621 * Inform any modules associated with this file that they are
625 for (mod = TAILQ_FIRST(&file->modules); mod; mod = next) {
626 next = module_getfnext(mod);
630 * Give the module a chance to veto the unload.
632 if ((error = module_unload(mod)) != 0) {
633 KLD_DPF(FILE, ("linker_file_unload: module %s"
634 " failed unload\n", mod));
642 TAILQ_FOREACH_SAFE(ml, &found_modules, link, nextml) {
643 if (ml->container == file) {
644 TAILQ_REMOVE(&found_modules, ml, link);
650 * Don't try to run SYSUNINITs if we are unloaded due to a
653 if (file->flags & LINKER_FILE_LINKED) {
654 file->flags &= ~LINKER_FILE_LINKED;
656 linker_file_sysuninit(file);
657 linker_file_unregister_sysctls(file);
660 TAILQ_REMOVE(&linker_files, file, link);
663 for (i = 0; i < file->ndeps; i++)
664 linker_file_unload(file->deps[i], flags);
665 free(file->deps, M_LINKER);
668 while ((cp = STAILQ_FIRST(&file->common)) != NULL) {
669 STAILQ_REMOVE_HEAD(&file->common, link);
674 if (file->filename) {
675 free(file->filename, M_LINKER);
676 file->filename = NULL;
678 if (file->pathname) {
679 free(file->pathname, M_LINKER);
680 file->pathname = NULL;
682 kobj_delete((kobj_t) file, M_LINKER);
687 linker_ctf_get(linker_file_t file, linker_ctf_t *lc)
689 return (LINKER_CTF_GET(file, lc));
693 linker_file_add_dependency(linker_file_t file, linker_file_t dep)
695 linker_file_t *newdeps;
698 newdeps = malloc((file->ndeps + 1) * sizeof(linker_file_t *),
699 M_LINKER, M_WAITOK | M_ZERO);
704 bcopy(file->deps, newdeps,
705 file->ndeps * sizeof(linker_file_t *));
706 free(file->deps, M_LINKER);
708 file->deps = newdeps;
709 file->deps[file->ndeps] = dep;
715 * Locate a linker set and its contents. This is a helper function to avoid
716 * linker_if.h exposure elsewhere. Note: firstp and lastp are really void **.
717 * This function is used in this file so we can avoid having lots of (void **)
721 linker_file_lookup_set(linker_file_t file, const char *name,
722 void *firstp, void *lastp, int *countp)
726 locked = KLD_LOCKED();
729 error = LINKER_LOOKUP_SET(file, name, firstp, lastp, countp);
736 * List all functions in a file.
739 linker_file_function_listall(linker_file_t lf,
740 linker_function_nameval_callback_t callback_func, void *arg)
742 return (LINKER_EACH_FUNCTION_NAMEVAL(lf, callback_func, arg));
746 linker_file_lookup_symbol(linker_file_t file, const char *name, int deps)
751 locked = KLD_LOCKED();
754 sym = linker_file_lookup_symbol_internal(file, name, deps);
761 linker_file_lookup_symbol_internal(linker_file_t file, const char *name,
765 linker_symval_t symval;
767 size_t common_size = 0;
771 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n",
774 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {
775 LINKER_SYMBOL_VALUES(file, sym, &symval);
776 if (symval.value == 0)
778 * For commons, first look them up in the
779 * dependencies and only allocate space if not found
782 common_size = symval.size;
784 KLD_DPF(SYM, ("linker_file_lookup_symbol: symbol"
785 ".value=%p\n", symval.value));
786 return (symval.value);
790 for (i = 0; i < file->ndeps; i++) {
791 address = linker_file_lookup_symbol_internal(
792 file->deps[i], name, 0);
794 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
795 " deps value=%p\n", address));
800 if (common_size > 0) {
802 * This is a common symbol which was not found in the
803 * dependencies. We maintain a simple common symbol table in
806 struct common_symbol *cp;
808 STAILQ_FOREACH(cp, &file->common, link) {
809 if (strcmp(cp->name, name) == 0) {
810 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
811 " old common value=%p\n", cp->address));
812 return (cp->address);
816 * Round the symbol size up to align.
818 common_size = (common_size + sizeof(int) - 1) & -sizeof(int);
819 cp = malloc(sizeof(struct common_symbol)
820 + common_size + strlen(name) + 1, M_LINKER,
822 cp->address = (caddr_t)(cp + 1);
823 cp->name = cp->address + common_size;
824 strcpy(cp->name, name);
825 bzero(cp->address, common_size);
826 STAILQ_INSERT_TAIL(&file->common, cp, link);
828 KLD_DPF(SYM, ("linker_file_lookup_symbol: new common"
829 " value=%p\n", cp->address));
830 return (cp->address);
832 KLD_DPF(SYM, ("linker_file_lookup_symbol: fail\n"));
837 * Both DDB and stack(9) rely on the kernel linker to provide forward and
838 * backward lookup of symbols. However, DDB and sometimes stack(9) need to
839 * do this in a lockfree manner. We provide a set of internal helper
840 * routines to perform these operations without locks, and then wrappers that
843 * linker_debug_lookup() is ifdef DDB as currently it's only used by DDB.
847 linker_debug_lookup(const char *symstr, c_linker_sym_t *sym)
851 TAILQ_FOREACH(lf, &linker_files, link) {
852 if (LINKER_LOOKUP_SYMBOL(lf, symstr, sym) == 0)
860 linker_debug_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
863 c_linker_sym_t best, es;
864 u_long diff, bestdiff, off;
867 off = (uintptr_t)value;
869 TAILQ_FOREACH(lf, &linker_files, link) {
870 if (LINKER_SEARCH_SYMBOL(lf, value, &es, &diff) != 0)
872 if (es != 0 && diff < bestdiff) {
891 linker_debug_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
895 TAILQ_FOREACH(lf, &linker_files, link) {
896 if (LINKER_SYMBOL_VALUES(lf, sym, symval) == 0)
903 linker_debug_search_symbol_name(caddr_t value, char *buf, u_int buflen,
906 linker_symval_t symval;
911 error = linker_debug_search_symbol(value, &sym, offset);
914 error = linker_debug_symbol_values(sym, &symval);
917 strlcpy(buf, symval.name, buflen);
923 * DDB Helpers. DDB has to look across multiple files with their own symbol
924 * tables and string tables.
926 * Note that we do not obey list locking protocols here. We really don't need
927 * DDB to hang because somebody's got the lock held. We'll take the chance
928 * that the files list is inconsistant instead.
931 linker_ddb_lookup(const char *symstr, c_linker_sym_t *sym)
934 return (linker_debug_lookup(symstr, sym));
938 linker_ddb_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
941 return (linker_debug_search_symbol(value, sym, diffp));
945 linker_ddb_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
948 return (linker_debug_symbol_values(sym, symval));
952 linker_ddb_search_symbol_name(caddr_t value, char *buf, u_int buflen,
956 return (linker_debug_search_symbol_name(value, buf, buflen, offset));
961 * stack(9) helper for non-debugging environemnts. Unlike DDB helpers, we do
962 * obey locking protocols, and offer a significantly less complex interface.
965 linker_search_symbol_name(caddr_t value, char *buf, u_int buflen,
971 error = linker_debug_search_symbol_name(value, buf, buflen, offset);
980 kern_kldload(struct thread *td, const char *file, int *fileid)
983 struct pmckern_map_in pkm;
985 const char *kldname, *modname;
989 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
992 if ((error = priv_check(td, PRIV_KLD_LOAD)) != 0)
996 * It is possible that kldloaded module will attach a new ifnet,
997 * so vnet context must be set when this ocurs.
999 CURVNET_SET(TD_TO_VNET(td));
1002 * If file does not contain a qualified name or any dot in it
1003 * (kldname.ko, or kldname.ver.ko) treat it as an interface
1006 if (index(file, '/') || index(file, '.')) {
1015 error = linker_load_module(kldname, modname, NULL, NULL, &lf);
1019 pkm.pm_file = lf->filename;
1020 pkm.pm_address = (uintptr_t) lf->address;
1021 PMC_CALL_HOOK(td, PMC_FN_KLD_LOAD, (void *) &pkm);
1033 kldload(struct thread *td, struct kldload_args *uap)
1035 char *pathname = NULL;
1038 td->td_retval[0] = -1;
1040 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1041 error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL);
1043 error = kern_kldload(td, pathname, &fileid);
1045 td->td_retval[0] = fileid;
1047 free(pathname, M_TEMP);
1052 kern_kldunload(struct thread *td, int fileid, int flags)
1055 struct pmckern_map_out pkm;
1060 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1063 if ((error = priv_check(td, PRIV_KLD_UNLOAD)) != 0)
1066 CURVNET_SET(TD_TO_VNET(td));
1068 lf = linker_find_file_by_id(fileid);
1070 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
1072 /* Check if there are DTrace probes enabled on this file. */
1073 if (lf->nenabled > 0) {
1074 printf("kldunload: attempt to unload file that has"
1075 " DTrace probes enabled\n");
1077 } else if (lf->userrefs == 0) {
1079 * XXX: maybe LINKER_UNLOAD_FORCE should override ?
1081 printf("kldunload: attempt to unload file that was"
1082 " loaded by the kernel\n");
1086 /* Save data needed by hwpmc(4) before unloading. */
1087 pkm.pm_address = (uintptr_t) lf->address;
1088 pkm.pm_size = lf->size;
1091 error = linker_file_unload(lf, flags);
1100 PMC_CALL_HOOK(td, PMC_FN_KLD_UNLOAD, (void *) &pkm);
1108 kldunload(struct thread *td, struct kldunload_args *uap)
1111 return (kern_kldunload(td, uap->fileid, LINKER_UNLOAD_NORMAL));
1115 kldunloadf(struct thread *td, struct kldunloadf_args *uap)
1118 if (uap->flags != LINKER_UNLOAD_NORMAL &&
1119 uap->flags != LINKER_UNLOAD_FORCE)
1121 return (kern_kldunload(td, uap->fileid, uap->flags));
1125 kldfind(struct thread *td, struct kldfind_args *uap)
1128 const char *filename;
1133 error = mac_kld_check_stat(td->td_ucred);
1138 td->td_retval[0] = -1;
1140 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1141 if ((error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL)) != 0)
1144 filename = linker_basename(pathname);
1146 lf = linker_find_file_by_name(filename);
1148 td->td_retval[0] = lf->id;
1153 free(pathname, M_TEMP);
1158 kldnext(struct thread *td, struct kldnext_args *uap)
1164 error = mac_kld_check_stat(td->td_ucred);
1170 if (uap->fileid == 0)
1171 lf = TAILQ_FIRST(&linker_files);
1173 lf = linker_find_file_by_id(uap->fileid);
1178 lf = TAILQ_NEXT(lf, link);
1181 /* Skip partially loaded files. */
1182 while (lf != NULL && !(lf->flags & LINKER_FILE_LINKED))
1183 lf = TAILQ_NEXT(lf, link);
1186 td->td_retval[0] = lf->id;
1188 td->td_retval[0] = 0;
1195 kldstat(struct thread *td, struct kldstat_args *uap)
1197 struct kld_file_stat stat;
1199 int error, namelen, version, version_num;
1202 * Check the version of the user's structure.
1204 if ((error = copyin(&uap->stat->version, &version, sizeof(version))) != 0)
1206 if (version == sizeof(struct kld_file_stat_1))
1208 else if (version == sizeof(struct kld_file_stat))
1214 error = mac_kld_check_stat(td->td_ucred);
1220 lf = linker_find_file_by_id(uap->fileid);
1226 /* Version 1 fields: */
1227 namelen = strlen(lf->filename) + 1;
1228 if (namelen > MAXPATHLEN)
1229 namelen = MAXPATHLEN;
1230 bcopy(lf->filename, &stat.name[0], namelen);
1231 stat.refs = lf->refs;
1233 stat.address = lf->address;
1234 stat.size = lf->size;
1235 if (version_num > 1) {
1236 /* Version 2 fields: */
1237 namelen = strlen(lf->pathname) + 1;
1238 if (namelen > MAXPATHLEN)
1239 namelen = MAXPATHLEN;
1240 bcopy(lf->pathname, &stat.pathname[0], namelen);
1244 td->td_retval[0] = 0;
1246 return (copyout(&stat, uap->stat, version));
1250 kldfirstmod(struct thread *td, struct kldfirstmod_args *uap)
1257 error = mac_kld_check_stat(td->td_ucred);
1263 lf = linker_find_file_by_id(uap->fileid);
1266 mp = TAILQ_FIRST(&lf->modules);
1268 td->td_retval[0] = module_getid(mp);
1270 td->td_retval[0] = 0;
1279 kldsym(struct thread *td, struct kldsym_args *uap)
1281 char *symstr = NULL;
1283 linker_symval_t symval;
1285 struct kld_sym_lookup lookup;
1289 error = mac_kld_check_stat(td->td_ucred);
1294 if ((error = copyin(uap->data, &lookup, sizeof(lookup))) != 0)
1296 if (lookup.version != sizeof(lookup) ||
1297 uap->cmd != KLDSYM_LOOKUP)
1299 symstr = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1300 if ((error = copyinstr(lookup.symname, symstr, MAXPATHLEN, NULL)) != 0)
1303 if (uap->fileid != 0) {
1304 lf = linker_find_file_by_id(uap->fileid);
1307 else if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1308 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1309 lookup.symvalue = (uintptr_t) symval.value;
1310 lookup.symsize = symval.size;
1311 error = copyout(&lookup, uap->data, sizeof(lookup));
1315 TAILQ_FOREACH(lf, &linker_files, link) {
1316 if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1317 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1318 lookup.symvalue = (uintptr_t)symval.value;
1319 lookup.symsize = symval.size;
1320 error = copyout(&lookup, uap->data,
1330 free(symstr, M_TEMP);
1335 * Preloaded module support
1339 modlist_lookup(const char *name, int ver)
1343 TAILQ_FOREACH(mod, &found_modules, link) {
1344 if (strcmp(mod->name, name) == 0 &&
1345 (ver == 0 || mod->version == ver))
1352 modlist_lookup2(const char *name, struct mod_depend *verinfo)
1354 modlist_t mod, bestmod;
1357 if (verinfo == NULL)
1358 return (modlist_lookup(name, 0));
1360 TAILQ_FOREACH(mod, &found_modules, link) {
1361 if (strcmp(mod->name, name) != 0)
1364 if (ver == verinfo->md_ver_preferred)
1366 if (ver >= verinfo->md_ver_minimum &&
1367 ver <= verinfo->md_ver_maximum &&
1368 (bestmod == NULL || ver > bestmod->version))
1375 modlist_newmodule(const char *modname, int version, linker_file_t container)
1379 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT | M_ZERO);
1381 panic("no memory for module list");
1382 mod->container = container;
1383 mod->name = modname;
1384 mod->version = version;
1385 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1390 linker_addmodules(linker_file_t lf, struct mod_metadata **start,
1391 struct mod_metadata **stop, int preload)
1393 struct mod_metadata *mp, **mdp;
1394 const char *modname;
1397 for (mdp = start; mdp < stop; mdp++) {
1399 if (mp->md_type != MDT_VERSION)
1401 modname = mp->md_cval;
1402 ver = ((struct mod_version *)mp->md_data)->mv_version;
1403 if (modlist_lookup(modname, ver) != NULL) {
1404 printf("module %s already present!\n", modname);
1405 /* XXX what can we do? this is a build error. :-( */
1408 modlist_newmodule(modname, ver, lf);
1413 linker_preload(void *arg)
1416 const char *modname, *nmodname;
1418 linker_file_t lf, nlf;
1421 linker_file_list_t loaded_files;
1422 linker_file_list_t depended_files;
1423 struct mod_metadata *mp, *nmp;
1424 struct mod_metadata **start, **stop, **mdp, **nmdp;
1425 struct mod_depend *verinfo;
1429 struct sysinit **si_start, **si_stop;
1431 TAILQ_INIT(&loaded_files);
1432 TAILQ_INIT(&depended_files);
1433 TAILQ_INIT(&found_modules);
1437 while ((modptr = preload_search_next_name(modptr)) != NULL) {
1438 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
1439 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
1440 if (modname == NULL) {
1441 printf("Preloaded module at %p does not have a"
1442 " name!\n", modptr);
1445 if (modtype == NULL) {
1446 printf("Preloaded module at %p does not have a type!\n",
1451 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname,
1454 TAILQ_FOREACH(lc, &classes, link) {
1455 error = LINKER_LINK_PRELOAD(lc, modname, &lf);
1461 TAILQ_INSERT_TAIL(&loaded_files, lf, loaded);
1465 * First get a list of stuff in the kernel.
1467 if (linker_file_lookup_set(linker_kernel_file, MDT_SETNAME, &start,
1469 linker_addmodules(linker_kernel_file, start, stop, 1);
1472 * This is a once-off kinky bubble sort to resolve relocation
1473 * dependency requirements.
1476 TAILQ_FOREACH(lf, &loaded_files, loaded) {
1477 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1480 * First, look to see if we would successfully link with this
1483 resolves = 1; /* unless we know otherwise */
1485 for (mdp = start; mdp < stop; mdp++) {
1487 if (mp->md_type != MDT_DEPEND)
1489 modname = mp->md_cval;
1490 verinfo = mp->md_data;
1491 for (nmdp = start; nmdp < stop; nmdp++) {
1493 if (nmp->md_type != MDT_VERSION)
1495 nmodname = nmp->md_cval;
1496 if (strcmp(modname, nmodname) == 0)
1499 if (nmdp < stop) /* it's a self reference */
1503 * ok, the module isn't here yet, we
1506 if (modlist_lookup2(modname, verinfo) == NULL)
1511 * OK, if we found our modules, we can link. So, "provide"
1512 * the modules inside and add it to the end of the link order
1517 for (mdp = start; mdp < stop; mdp++) {
1519 if (mp->md_type != MDT_VERSION)
1521 modname = mp->md_cval;
1522 nver = ((struct mod_version *)
1523 mp->md_data)->mv_version;
1524 if (modlist_lookup(modname,
1526 printf("module %s already"
1527 " present!\n", modname);
1528 TAILQ_REMOVE(&loaded_files,
1530 linker_file_unload(lf,
1531 LINKER_UNLOAD_FORCE);
1532 /* we changed tailq next ptr */
1535 modlist_newmodule(modname, nver, lf);
1538 TAILQ_REMOVE(&loaded_files, lf, loaded);
1539 TAILQ_INSERT_TAIL(&depended_files, lf, loaded);
1541 * Since we provided modules, we need to restart the
1542 * sort so that the previous files that depend on us
1543 * have a chance. Also, we've busted the tailq next
1544 * pointer with the REMOVE.
1551 * At this point, we check to see what could not be resolved..
1553 while ((lf = TAILQ_FIRST(&loaded_files)) != NULL) {
1554 TAILQ_REMOVE(&loaded_files, lf, loaded);
1555 printf("KLD file %s is missing dependencies\n", lf->filename);
1556 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1560 * We made it. Finish off the linking in the order we determined.
1562 TAILQ_FOREACH_SAFE(lf, &depended_files, loaded, nlf) {
1563 if (linker_kernel_file) {
1564 linker_kernel_file->refs++;
1565 error = linker_file_add_dependency(lf,
1566 linker_kernel_file);
1568 panic("cannot add dependency");
1570 lf->userrefs++; /* so we can (try to) kldunload it */
1571 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1574 for (mdp = start; mdp < stop; mdp++) {
1576 if (mp->md_type != MDT_DEPEND)
1578 modname = mp->md_cval;
1579 verinfo = mp->md_data;
1580 mod = modlist_lookup2(modname, verinfo);
1581 /* Don't count self-dependencies */
1582 if (lf == mod->container)
1584 mod->container->refs++;
1585 error = linker_file_add_dependency(lf,
1588 panic("cannot add dependency");
1592 * Now do relocation etc using the symbol search paths
1593 * established by the dependencies
1595 error = LINKER_LINK_PRELOAD_FINISH(lf);
1597 TAILQ_REMOVE(&depended_files, lf, loaded);
1598 printf("KLD file %s - could not finalize loading\n",
1600 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1603 linker_file_register_modules(lf);
1604 if (linker_file_lookup_set(lf, "sysinit_set", &si_start,
1605 &si_stop, NULL) == 0)
1606 sysinit_add(si_start, si_stop);
1607 linker_file_register_sysctls(lf);
1608 lf->flags |= LINKER_FILE_LINKED;
1610 /* woohoo! we made it! */
1613 SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
1616 * Search for a not-loaded module by name.
1618 * Modules may be found in the following locations:
1620 * - preloaded (result is just the module name) - on disk (result is full path
1623 * If the module name is qualified in any way (contains path, etc.) the we
1624 * simply return a copy of it.
1626 * The search path can be manipulated via sysctl. Note that we use the ';'
1627 * character as a separator to be consistent with the bootloader.
1630 static char linker_hintfile[] = "linker.hints";
1631 static char linker_path[MAXPATHLEN] = "/boot/kernel;/boot/modules";
1633 SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RW, linker_path,
1634 sizeof(linker_path), "module load search path");
1636 TUNABLE_STR("module_path", linker_path, sizeof(linker_path));
1638 static char *linker_ext_list[] = {
1645 * Check if file actually exists either with or without extension listed in
1646 * the linker_ext_list. (probably should be generic for the rest of the
1650 linker_lookup_file(const char *path, int pathlen, const char *name,
1651 int namelen, struct vattr *vap)
1653 struct nameidata nd;
1654 struct thread *td = curthread; /* XXX */
1655 char *result, **cpp, *sep;
1656 int error, len, extlen, reclen, flags, vfslocked;
1660 for (cpp = linker_ext_list; *cpp; cpp++) {
1665 extlen++; /* trailing '\0' */
1666 sep = (path[pathlen - 1] != '/') ? "/" : "";
1668 reclen = pathlen + strlen(sep) + namelen + extlen + 1;
1669 result = malloc(reclen, M_LINKER, M_WAITOK);
1670 for (cpp = linker_ext_list; *cpp; cpp++) {
1671 snprintf(result, reclen, "%.*s%s%.*s%s", pathlen, path, sep,
1672 namelen, name, *cpp);
1674 * Attempt to open the file, and return the path if
1675 * we succeed and it's a regular file.
1677 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, result, td);
1679 error = vn_open(&nd, &flags, 0, NULL);
1681 vfslocked = NDHASGIANT(&nd);
1682 NDFREE(&nd, NDF_ONLY_PNBUF);
1683 type = nd.ni_vp->v_type;
1685 VOP_GETATTR(nd.ni_vp, vap, td->td_ucred);
1686 VOP_UNLOCK(nd.ni_vp, 0);
1687 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
1688 VFS_UNLOCK_GIANT(vfslocked);
1693 free(result, M_LINKER);
1697 #define INT_ALIGN(base, ptr) ptr = \
1698 (base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
1701 * Lookup KLD which contains requested module in the "linker.hints" file. If
1702 * version specification is available, then try to find the best KLD.
1703 * Otherwise just find the latest one.
1706 linker_hints_lookup(const char *path, int pathlen, const char *modname,
1707 int modnamelen, struct mod_depend *verinfo)
1709 struct thread *td = curthread; /* XXX */
1710 struct ucred *cred = td ? td->td_ucred : NULL;
1711 struct nameidata nd;
1712 struct vattr vattr, mattr;
1713 u_char *hints = NULL;
1714 u_char *cp, *recptr, *bufend, *result, *best, *pathbuf, *sep;
1715 int error, ival, bestver, *intp, reclen, found, flags, clen, blen;
1719 bestver = found = 0;
1721 sep = (path[pathlen - 1] != '/') ? "/" : "";
1722 reclen = imax(modnamelen, strlen(linker_hintfile)) + pathlen +
1724 pathbuf = malloc(reclen, M_LINKER, M_WAITOK);
1725 snprintf(pathbuf, reclen, "%.*s%s%s", pathlen, path, sep,
1728 NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE, UIO_SYSSPACE, pathbuf, td);
1730 error = vn_open(&nd, &flags, 0, NULL);
1733 vfslocked = NDHASGIANT(&nd);
1734 NDFREE(&nd, NDF_ONLY_PNBUF);
1735 if (nd.ni_vp->v_type != VREG)
1738 error = VOP_GETATTR(nd.ni_vp, &vattr, cred);
1742 * XXX: we need to limit this number to some reasonable value
1744 if (vattr.va_size > 100 * 1024) {
1745 printf("hints file too large %ld\n", (long)vattr.va_size);
1748 hints = malloc(vattr.va_size, M_TEMP, M_WAITOK);
1751 error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t)hints, vattr.va_size, 0,
1752 UIO_SYSSPACE, IO_NODELOCKED, cred, NOCRED, &reclen, td);
1755 VOP_UNLOCK(nd.ni_vp, 0);
1756 vn_close(nd.ni_vp, FREAD, cred, td);
1757 VFS_UNLOCK_GIANT(vfslocked);
1760 printf("can't read %d\n", reclen);
1763 intp = (int *)hints;
1765 if (ival != LINKER_HINTS_VERSION) {
1766 printf("hints file version mismatch %d\n", ival);
1769 bufend = hints + vattr.va_size;
1770 recptr = (u_char *)intp;
1772 while (recptr < bufend && !found) {
1773 intp = (int *)recptr;
1780 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
1783 INT_ALIGN(hints, cp);
1787 if (verinfo == NULL ||
1788 ival == verinfo->md_ver_preferred) {
1792 if (ival >= verinfo->md_ver_minimum &&
1793 ival <= verinfo->md_ver_maximum &&
1803 recptr += reclen + sizeof(int);
1806 * Finally check if KLD is in the place
1809 result = linker_lookup_file(path, pathlen, cp, clen, &mattr);
1811 result = linker_lookup_file(path, pathlen, best, blen, &mattr);
1814 * KLD is newer than hints file. What we should do now?
1816 if (result && timespeccmp(&mattr.va_mtime, &vattr.va_mtime, >))
1817 printf("warning: KLD '%s' is newer than the linker.hints"
1820 free(pathbuf, M_LINKER);
1822 free(hints, M_TEMP);
1823 if (nd.ni_vp != NULL) {
1824 VOP_UNLOCK(nd.ni_vp, 0);
1825 vn_close(nd.ni_vp, FREAD, cred, td);
1826 VFS_UNLOCK_GIANT(vfslocked);
1829 * If nothing found or hints is absent - fallback to the old
1830 * way by using "kldname[.ko]" as module name.
1832 if (!found && !bestver && result == NULL)
1833 result = linker_lookup_file(path, pathlen, modname,
1839 * Lookup KLD which contains requested module in the all directories.
1842 linker_search_module(const char *modname, int modnamelen,
1843 struct mod_depend *verinfo)
1845 char *cp, *ep, *result;
1848 * traverse the linker path
1850 for (cp = linker_path; *cp; cp = ep + 1) {
1851 /* find the end of this component */
1852 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++);
1853 result = linker_hints_lookup(cp, ep - cp, modname,
1854 modnamelen, verinfo);
1864 * Search for module in all directories listed in the linker_path.
1867 linker_search_kld(const char *name)
1869 char *cp, *ep, *result;
1872 /* qualified at all? */
1873 if (index(name, '/'))
1874 return (linker_strdup(name));
1876 /* traverse the linker path */
1878 for (ep = linker_path; *ep; ep++) {
1880 /* find the end of this component */
1881 for (; *ep != 0 && *ep != ';'; ep++);
1882 result = linker_lookup_file(cp, ep - cp, name, len, NULL);
1890 linker_basename(const char *path)
1892 const char *filename;
1894 filename = rindex(path, '/');
1895 if (filename == NULL)
1904 * Inform hwpmc about the set of kernel modules currently loaded.
1907 linker_hwpmc_list_objects(void)
1910 struct pmckern_map_in *kobase;
1915 TAILQ_FOREACH(lf, &linker_files, link)
1918 /* Allocate nmappings + 1 entries. */
1919 kobase = malloc((nmappings + 1) * sizeof(struct pmckern_map_in),
1920 M_LINKER, M_WAITOK | M_ZERO);
1922 TAILQ_FOREACH(lf, &linker_files, link) {
1924 /* Save the info for this linker file. */
1925 kobase[i].pm_file = lf->filename;
1926 kobase[i].pm_address = (uintptr_t)lf->address;
1931 KASSERT(i > 0, ("linker_hpwmc_list_objects: no kernel objects?"));
1933 /* The last entry of the malloced area comprises of all zeros. */
1934 KASSERT(kobase[i].pm_file == NULL,
1935 ("linker_hwpmc_list_objects: last object not NULL"));
1937 return ((void *)kobase);
1942 * Find a file which contains given module and load it, if "parent" is not
1943 * NULL, register a reference to it.
1946 linker_load_module(const char *kldname, const char *modname,
1947 struct linker_file *parent, struct mod_depend *verinfo,
1948 struct linker_file **lfpp)
1950 linker_file_t lfdep;
1951 const char *filename;
1956 if (modname == NULL) {
1958 * We have to load KLD
1960 KASSERT(verinfo == NULL, ("linker_load_module: verinfo"
1962 pathname = linker_search_kld(kldname);
1964 if (modlist_lookup2(modname, verinfo) != NULL)
1966 if (kldname != NULL)
1967 pathname = linker_strdup(kldname);
1968 else if (rootvnode == NULL)
1972 * Need to find a KLD with required module
1974 pathname = linker_search_module(modname,
1975 strlen(modname), verinfo);
1977 if (pathname == NULL)
1981 * Can't load more than one file with the same basename XXX:
1982 * Actually it should be possible to have multiple KLDs with
1983 * the same basename but different path because they can
1984 * provide different versions of the same modules.
1986 filename = linker_basename(pathname);
1987 if (linker_find_file_by_name(filename))
1990 error = linker_load_file(pathname, &lfdep);
1993 if (modname && verinfo &&
1994 modlist_lookup2(modname, verinfo) == NULL) {
1995 linker_file_unload(lfdep, LINKER_UNLOAD_FORCE);
2000 error = linker_file_add_dependency(parent, lfdep);
2007 free(pathname, M_LINKER);
2012 * This routine is responsible for finding dependencies of userland initiated
2013 * kldload(2)'s of files.
2016 linker_load_dependencies(linker_file_t lf)
2018 linker_file_t lfdep;
2019 struct mod_metadata **start, **stop, **mdp, **nmdp;
2020 struct mod_metadata *mp, *nmp;
2021 struct mod_depend *verinfo;
2023 const char *modname, *nmodname;
2024 int ver, error = 0, count;
2027 * All files are dependant on /kernel.
2030 if (linker_kernel_file) {
2031 linker_kernel_file->refs++;
2032 error = linker_file_add_dependency(lf, linker_kernel_file);
2036 if (linker_file_lookup_set(lf, MDT_SETNAME, &start, &stop,
2039 for (mdp = start; mdp < stop; mdp++) {
2041 if (mp->md_type != MDT_VERSION)
2043 modname = mp->md_cval;
2044 ver = ((struct mod_version *)mp->md_data)->mv_version;
2045 mod = modlist_lookup(modname, ver);
2047 printf("interface %s.%d already present in the KLD"
2048 " '%s'!\n", modname, ver,
2049 mod->container->filename);
2054 for (mdp = start; mdp < stop; mdp++) {
2056 if (mp->md_type != MDT_DEPEND)
2058 modname = mp->md_cval;
2059 verinfo = mp->md_data;
2061 for (nmdp = start; nmdp < stop; nmdp++) {
2063 if (nmp->md_type != MDT_VERSION)
2065 nmodname = nmp->md_cval;
2066 if (strcmp(modname, nmodname) == 0)
2069 if (nmdp < stop)/* early exit, it's a self reference */
2071 mod = modlist_lookup2(modname, verinfo);
2072 if (mod) { /* woohoo, it's loaded already */
2073 lfdep = mod->container;
2075 error = linker_file_add_dependency(lf, lfdep);
2080 error = linker_load_module(NULL, modname, lf, verinfo, NULL);
2082 printf("KLD %s: depends on %s - not available or"
2083 " version mismatch\n", lf->filename, modname);
2090 linker_addmodules(lf, start, stop, 0);
2095 sysctl_kern_function_list_iterate(const char *name, void *opaque)
2097 struct sysctl_req *req;
2100 return (SYSCTL_OUT(req, name, strlen(name) + 1));
2104 * Export a nul-separated, double-nul-terminated list of all function names
2108 sysctl_kern_function_list(SYSCTL_HANDLER_ARGS)
2114 error = mac_kld_check_stat(req->td->td_ucred);
2118 error = sysctl_wire_old_buffer(req, 0);
2122 TAILQ_FOREACH(lf, &linker_files, link) {
2123 error = LINKER_EACH_FUNCTION_NAME(lf,
2124 sysctl_kern_function_list_iterate, req);
2131 return (SYSCTL_OUT(req, "", 1));
2134 SYSCTL_PROC(_kern, OID_AUTO, function_list, CTLFLAG_RD,
2135 NULL, 0, sysctl_kern_function_list, "", "kernel function list");