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"
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/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>
55 #include <security/mac/mac_framework.h>
57 #include "linker_if.h"
60 #include <sys/pmckern.h>
67 #define KLD_LOCK() sx_xlock(&kld_sx)
68 #define KLD_UNLOCK() sx_xunlock(&kld_sx)
69 #define KLD_LOCKED() sx_xlocked(&kld_sx)
70 #define KLD_LOCK_ASSERT() do { \
72 sx_assert(&kld_sx, SX_XLOCKED); \
76 * static char *linker_search_path(const char *name, struct mod_depend
79 static const char *linker_basename(const char *path);
82 * Find a currently loaded file given its filename.
84 static linker_file_t linker_find_file_by_name(const char* _filename);
87 * Find a currently loaded file given its file id.
89 static linker_file_t linker_find_file_by_id(int _fileid);
91 /* Metadata from the static kernel */
92 SET_DECLARE(modmetadata_set, struct mod_metadata);
94 MALLOC_DEFINE(M_LINKER, "linker", "kernel linker");
96 linker_file_t linker_kernel_file;
98 static struct sx kld_sx; /* kernel linker lock */
101 * Load counter used by clients to determine if a linker file has been
102 * re-loaded. This counter is incremented for each file load.
106 static linker_class_list_t classes;
107 static linker_file_list_t linker_files;
108 static int next_file_id = 1;
109 static int linker_no_more_classes = 0;
111 #define LINKER_GET_NEXT_FILE_ID(a) do { \
112 linker_file_t lftmp; \
116 TAILQ_FOREACH(lftmp, &linker_files, link) { \
117 if (next_file_id == lftmp->id) { \
122 (a) = next_file_id; \
126 /* XXX wrong name; we're looking at version provision tags here, not modules */
127 typedef TAILQ_HEAD(, modlist) modlisthead_t;
129 TAILQ_ENTRY(modlist) link; /* chain together all modules */
130 linker_file_t container;
134 typedef struct modlist *modlist_t;
135 static modlisthead_t found_modules;
137 static int linker_file_add_dependency(linker_file_t file,
139 static caddr_t linker_file_lookup_symbol_internal(linker_file_t file,
140 const char* name, int deps);
141 static int linker_load_module(const char *kldname,
142 const char *modname, struct linker_file *parent,
143 struct mod_depend *verinfo, struct linker_file **lfpp);
144 static modlist_t modlist_lookup2(const char *name, struct mod_depend *verinfo);
147 linker_strdup(const char *str)
151 if ((result = malloc((strlen(str) + 1), M_LINKER, M_WAITOK)) != NULL)
157 linker_init(void *arg)
160 sx_init(&kld_sx, "kernel linker");
161 TAILQ_INIT(&classes);
162 TAILQ_INIT(&linker_files);
165 SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
168 linker_stop_class_add(void *arg)
171 linker_no_more_classes = 1;
174 SYSINIT(linker_class, SI_SUB_KLD, SI_ORDER_ANY, linker_stop_class_add, NULL);
177 linker_add_class(linker_class_t lc)
181 * We disallow any class registration past SI_ORDER_ANY
182 * of SI_SUB_KLD. We bump the reference count to keep the
183 * ops from being freed.
185 if (linker_no_more_classes == 1)
187 kobj_class_compile((kobj_class_t) lc);
188 ((kobj_class_t)lc)->refs++; /* XXX: kobj_mtx */
189 TAILQ_INSERT_TAIL(&classes, lc, link);
194 linker_file_sysinit(linker_file_t lf)
196 struct sysinit **start, **stop, **sipp, **xipp, *save;
198 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
201 if (linker_file_lookup_set(lf, "sysinit_set", &start, &stop, NULL) != 0)
204 * Perform a bubble sort of the system initialization objects by
205 * their subsystem (primary key) and order (secondary key).
207 * Since some things care about execution order, this is the operation
208 * which ensures continued function.
210 for (sipp = start; sipp < stop; sipp++) {
211 for (xipp = sipp + 1; xipp < stop; xipp++) {
212 if ((*sipp)->subsystem < (*xipp)->subsystem ||
213 ((*sipp)->subsystem == (*xipp)->subsystem &&
214 (*sipp)->order <= (*xipp)->order))
223 * Traverse the (now) ordered list of system initialization tasks.
224 * Perform each task, and continue on to the next task.
227 for (sipp = start; sipp < stop; sipp++) {
228 if ((*sipp)->subsystem == SI_SUB_DUMMY)
229 continue; /* skip dummy task(s) */
232 (*((*sipp)->func)) ((*sipp)->udata);
238 linker_file_sysuninit(linker_file_t lf)
240 struct sysinit **start, **stop, **sipp, **xipp, *save;
242 KLD_DPF(FILE, ("linker_file_sysuninit: calling SYSUNINITs for %s\n",
245 if (linker_file_lookup_set(lf, "sysuninit_set", &start, &stop,
250 * Perform a reverse bubble sort of the system initialization objects
251 * by their subsystem (primary key) and order (secondary key).
253 * Since some things care about execution order, this is the operation
254 * which ensures continued function.
256 for (sipp = start; sipp < stop; sipp++) {
257 for (xipp = sipp + 1; xipp < stop; xipp++) {
258 if ((*sipp)->subsystem > (*xipp)->subsystem ||
259 ((*sipp)->subsystem == (*xipp)->subsystem &&
260 (*sipp)->order >= (*xipp)->order))
269 * Traverse the (now) ordered list of system initialization tasks.
270 * Perform each task, and continue on to the next task.
273 for (sipp = start; sipp < stop; sipp++) {
274 if ((*sipp)->subsystem == SI_SUB_DUMMY)
275 continue; /* skip dummy task(s) */
278 (*((*sipp)->func)) ((*sipp)->udata);
284 linker_file_register_sysctls(linker_file_t lf)
286 struct sysctl_oid **start, **stop, **oidp;
289 ("linker_file_register_sysctls: registering SYSCTLs for %s\n",
292 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
296 for (oidp = start; oidp < stop; oidp++)
297 sysctl_register_oid(*oidp);
302 linker_file_unregister_sysctls(linker_file_t lf)
304 struct sysctl_oid **start, **stop, **oidp;
306 KLD_DPF(FILE, ("linker_file_unregister_sysctls: registering SYSCTLs"
307 " for %s\n", lf->filename));
309 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
313 for (oidp = start; oidp < stop; oidp++)
314 sysctl_unregister_oid(*oidp);
319 linker_file_register_modules(linker_file_t lf)
321 struct mod_metadata **start, **stop, **mdp;
322 const moduledata_t *moddata;
323 int first_error, error;
325 KLD_DPF(FILE, ("linker_file_register_modules: registering modules"
326 " in %s\n", lf->filename));
328 if (linker_file_lookup_set(lf, "modmetadata_set", &start,
331 * This fallback should be unnecessary, but if we get booted
332 * from boot2 instead of loader and we are missing our
333 * metadata then we have to try the best we can.
335 if (lf == linker_kernel_file) {
336 start = SET_BEGIN(modmetadata_set);
337 stop = SET_LIMIT(modmetadata_set);
342 for (mdp = start; mdp < stop; mdp++) {
343 if ((*mdp)->md_type != MDT_MODULE)
345 moddata = (*mdp)->md_data;
346 KLD_DPF(FILE, ("Registering module %s in %s\n",
347 moddata->name, lf->filename));
348 error = module_register(moddata, lf);
350 printf("Module %s failed to register: %d\n",
351 moddata->name, error);
352 if (first_error == 0)
356 return (first_error);
360 linker_init_kernel_modules(void)
363 linker_file_register_modules(linker_kernel_file);
366 SYSINIT(linker_kernel, SI_SUB_KLD, SI_ORDER_ANY, linker_init_kernel_modules,
370 linker_load_file(const char *filename, linker_file_t *result)
374 int foundfile, error;
376 /* Refuse to load modules if securelevel raised */
381 lf = linker_find_file_by_name(filename);
383 KLD_DPF(FILE, ("linker_load_file: file %s is already loaded,"
384 " incrementing refs\n", filename));
393 * We do not need to protect (lock) classes here because there is
394 * no class registration past startup (SI_SUB_KLD, SI_ORDER_ANY)
395 * and there is no class deregistration mechanism at this time.
397 TAILQ_FOREACH(lc, &classes, link) {
398 KLD_DPF(FILE, ("linker_load_file: trying to load %s\n",
400 error = LINKER_LOAD_FILE(lc, filename, &lf);
402 * If we got something other than ENOENT, then it exists but
403 * we cannot load it for some other reason.
408 error = linker_file_register_modules(lf);
409 if (error == EEXIST) {
410 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
414 linker_file_register_sysctls(lf);
415 linker_file_sysinit(lf);
417 lf->flags |= LINKER_FILE_LINKED;
423 * Less than ideal, but tells the user whether it failed to load or
424 * the module was not found.
428 * Format not recognized or otherwise unloadable.
429 * When loading a module that is statically built into
430 * the kernel EEXIST percolates back up as the return
431 * value. Preserve this so that apps like sysinstall
432 * can recognize this special case and not post bogus
438 error = ENOENT; /* Nothing found */
443 linker_reference_module(const char *modname, struct mod_depend *verinfo,
444 linker_file_t *result)
450 if ((mod = modlist_lookup2(modname, verinfo)) != NULL) {
451 *result = mod->container;
457 error = linker_load_module(NULL, modname, NULL, verinfo, result);
463 linker_release_module(const char *modname, struct mod_depend *verinfo,
471 KASSERT(modname != NULL,
472 ("linker_release_module: no file or name"));
473 mod = modlist_lookup2(modname, verinfo);
480 KASSERT(modname == NULL && verinfo == NULL,
481 ("linker_release_module: both file and name"));
482 error = linker_file_unload(lf, LINKER_UNLOAD_NORMAL);
488 linker_find_file_by_name(const char *filename)
493 koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK);
494 sprintf(koname, "%s.ko", filename);
497 TAILQ_FOREACH(lf, &linker_files, link) {
498 if (strcmp(lf->filename, koname) == 0)
500 if (strcmp(lf->filename, filename) == 0)
503 free(koname, M_LINKER);
508 linker_find_file_by_id(int fileid)
513 TAILQ_FOREACH(lf, &linker_files, link)
514 if (lf->id == fileid && lf->flags & LINKER_FILE_LINKED)
520 linker_file_foreach(linker_predicate_t *predicate, void *context)
526 TAILQ_FOREACH(lf, &linker_files, link) {
527 retval = predicate(lf, context);
536 linker_make_file(const char *pathname, linker_class_t lc)
539 const char *filename;
542 filename = linker_basename(pathname);
544 KLD_DPF(FILE, ("linker_make_file: new file, filename='%s' for pathname='%s'\n", filename, pathname));
545 lf = (linker_file_t)kobj_create((kobj_class_t)lc, M_LINKER, M_WAITOK);
551 lf->filename = linker_strdup(filename);
552 lf->pathname = linker_strdup(pathname);
553 LINKER_GET_NEXT_FILE_ID(lf->id);
556 lf->loadcnt = ++loadcnt;
557 lf->sdt_probes = NULL;
559 STAILQ_INIT(&lf->common);
560 TAILQ_INIT(&lf->modules);
561 TAILQ_INSERT_TAIL(&linker_files, lf, link);
566 linker_file_unload(linker_file_t file, int flags)
569 modlist_t ml, nextml;
570 struct common_symbol *cp;
573 /* Refuse to unload modules if securelevel raised. */
578 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
580 /* Easy case of just dropping a reference. */
581 if (file->refs > 1) {
586 KLD_DPF(FILE, ("linker_file_unload: file is unloading,"
587 " informing modules\n"));
590 * Quiesce all the modules to give them a chance to veto the unload.
593 for (mod = TAILQ_FIRST(&file->modules); mod;
594 mod = module_getfnext(mod)) {
596 error = module_quiesce(mod);
597 if (error != 0 && flags != LINKER_UNLOAD_FORCE) {
598 KLD_DPF(FILE, ("linker_file_unload: module %s"
599 " vetoed unload\n", module_getname(mod)));
601 * XXX: Do we need to tell all the quiesced modules
602 * that they can resume work now via a new module
612 * Inform any modules associated with this file that they are
616 for (mod = TAILQ_FIRST(&file->modules); mod; mod = next) {
617 next = module_getfnext(mod);
621 * Give the module a chance to veto the unload.
623 if ((error = module_unload(mod)) != 0) {
624 KLD_DPF(FILE, ("linker_file_unload: module %s"
625 " failed unload\n", mod));
633 TAILQ_FOREACH_SAFE(ml, &found_modules, link, nextml) {
634 if (ml->container == file) {
635 TAILQ_REMOVE(&found_modules, ml, link);
641 * Don't try to run SYSUNINITs if we are unloaded due to a
644 if (file->flags & LINKER_FILE_LINKED) {
645 file->flags &= ~LINKER_FILE_LINKED;
647 linker_file_sysuninit(file);
648 linker_file_unregister_sysctls(file);
651 TAILQ_REMOVE(&linker_files, file, link);
654 for (i = 0; i < file->ndeps; i++)
655 linker_file_unload(file->deps[i], flags);
656 free(file->deps, M_LINKER);
659 while ((cp = STAILQ_FIRST(&file->common)) != NULL) {
660 STAILQ_REMOVE_HEAD(&file->common, link);
665 if (file->filename) {
666 free(file->filename, M_LINKER);
667 file->filename = NULL;
669 if (file->pathname) {
670 free(file->pathname, M_LINKER);
671 file->pathname = NULL;
673 kobj_delete((kobj_t) file, M_LINKER);
678 linker_ctf_get(linker_file_t file, linker_ctf_t *lc)
680 return (LINKER_CTF_GET(file, lc));
684 linker_file_add_dependency(linker_file_t file, linker_file_t dep)
686 linker_file_t *newdeps;
689 newdeps = malloc((file->ndeps + 1) * sizeof(linker_file_t *),
690 M_LINKER, M_WAITOK | M_ZERO);
695 bcopy(file->deps, newdeps,
696 file->ndeps * sizeof(linker_file_t *));
697 free(file->deps, M_LINKER);
699 file->deps = newdeps;
700 file->deps[file->ndeps] = dep;
706 * Locate a linker set and its contents. This is a helper function to avoid
707 * linker_if.h exposure elsewhere. Note: firstp and lastp are really void **.
708 * This function is used in this file so we can avoid having lots of (void **)
712 linker_file_lookup_set(linker_file_t file, const char *name,
713 void *firstp, void *lastp, int *countp)
717 locked = KLD_LOCKED();
720 error = LINKER_LOOKUP_SET(file, name, firstp, lastp, countp);
727 * List all functions in a file.
730 linker_file_function_listall(linker_file_t lf,
731 linker_function_nameval_callback_t callback_func, void *arg)
733 return (LINKER_EACH_FUNCTION_NAMEVAL(lf, callback_func, arg));
737 linker_file_lookup_symbol(linker_file_t file, const char *name, int deps)
742 locked = KLD_LOCKED();
745 sym = linker_file_lookup_symbol_internal(file, name, deps);
752 linker_file_lookup_symbol_internal(linker_file_t file, const char *name,
756 linker_symval_t symval;
758 size_t common_size = 0;
762 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n",
765 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {
766 LINKER_SYMBOL_VALUES(file, sym, &symval);
767 if (symval.value == 0)
769 * For commons, first look them up in the
770 * dependencies and only allocate space if not found
773 common_size = symval.size;
775 KLD_DPF(SYM, ("linker_file_lookup_symbol: symbol"
776 ".value=%p\n", symval.value));
777 return (symval.value);
781 for (i = 0; i < file->ndeps; i++) {
782 address = linker_file_lookup_symbol_internal(
783 file->deps[i], name, 0);
785 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
786 " deps value=%p\n", address));
791 if (common_size > 0) {
793 * This is a common symbol which was not found in the
794 * dependencies. We maintain a simple common symbol table in
797 struct common_symbol *cp;
799 STAILQ_FOREACH(cp, &file->common, link) {
800 if (strcmp(cp->name, name) == 0) {
801 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
802 " old common value=%p\n", cp->address));
803 return (cp->address);
807 * Round the symbol size up to align.
809 common_size = (common_size + sizeof(int) - 1) & -sizeof(int);
810 cp = malloc(sizeof(struct common_symbol)
811 + common_size + strlen(name) + 1, M_LINKER,
813 cp->address = (caddr_t)(cp + 1);
814 cp->name = cp->address + common_size;
815 strcpy(cp->name, name);
816 bzero(cp->address, common_size);
817 STAILQ_INSERT_TAIL(&file->common, cp, link);
819 KLD_DPF(SYM, ("linker_file_lookup_symbol: new common"
820 " value=%p\n", cp->address));
821 return (cp->address);
823 KLD_DPF(SYM, ("linker_file_lookup_symbol: fail\n"));
828 * Both DDB and stack(9) rely on the kernel linker to provide forward and
829 * backward lookup of symbols. However, DDB and sometimes stack(9) need to
830 * do this in a lockfree manner. We provide a set of internal helper
831 * routines to perform these operations without locks, and then wrappers that
834 * linker_debug_lookup() is ifdef DDB as currently it's only used by DDB.
838 linker_debug_lookup(const char *symstr, c_linker_sym_t *sym)
842 TAILQ_FOREACH(lf, &linker_files, link) {
843 if (LINKER_LOOKUP_SYMBOL(lf, symstr, sym) == 0)
851 linker_debug_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
854 c_linker_sym_t best, es;
855 u_long diff, bestdiff, off;
858 off = (uintptr_t)value;
860 TAILQ_FOREACH(lf, &linker_files, link) {
861 if (LINKER_SEARCH_SYMBOL(lf, value, &es, &diff) != 0)
863 if (es != 0 && diff < bestdiff) {
882 linker_debug_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
886 TAILQ_FOREACH(lf, &linker_files, link) {
887 if (LINKER_SYMBOL_VALUES(lf, sym, symval) == 0)
894 linker_debug_search_symbol_name(caddr_t value, char *buf, u_int buflen,
897 linker_symval_t symval;
902 error = linker_debug_search_symbol(value, &sym, offset);
905 error = linker_debug_symbol_values(sym, &symval);
908 strlcpy(buf, symval.name, buflen);
914 * DDB Helpers. DDB has to look across multiple files with their own symbol
915 * tables and string tables.
917 * Note that we do not obey list locking protocols here. We really don't need
918 * DDB to hang because somebody's got the lock held. We'll take the chance
919 * that the files list is inconsistant instead.
922 linker_ddb_lookup(const char *symstr, c_linker_sym_t *sym)
925 return (linker_debug_lookup(symstr, sym));
929 linker_ddb_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
932 return (linker_debug_search_symbol(value, sym, diffp));
936 linker_ddb_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
939 return (linker_debug_symbol_values(sym, symval));
943 linker_ddb_search_symbol_name(caddr_t value, char *buf, u_int buflen,
947 return (linker_debug_search_symbol_name(value, buf, buflen, offset));
952 * stack(9) helper for non-debugging environemnts. Unlike DDB helpers, we do
953 * obey locking protocols, and offer a significantly less complex interface.
956 linker_search_symbol_name(caddr_t value, char *buf, u_int buflen,
962 error = linker_debug_search_symbol_name(value, buf, buflen, offset);
971 kern_kldload(struct thread *td, const char *file, int *fileid)
974 struct pmckern_map_in pkm;
976 const char *kldname, *modname;
980 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
983 if ((error = priv_check(td, PRIV_KLD_LOAD)) != 0)
987 * If file does not contain a qualified name or any dot in it
988 * (kldname.ko, or kldname.ver.ko) treat it as an interface
991 if (index(file, '/') || index(file, '.')) {
1000 error = linker_load_module(kldname, modname, NULL, NULL, &lf);
1004 pkm.pm_file = lf->filename;
1005 pkm.pm_address = (uintptr_t) lf->address;
1006 PMC_CALL_HOOK(td, PMC_FN_KLD_LOAD, (void *) &pkm);
1017 kldload(struct thread *td, struct kldload_args *uap)
1019 char *pathname = NULL;
1022 td->td_retval[0] = -1;
1024 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1025 error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL);
1027 error = kern_kldload(td, pathname, &fileid);
1029 td->td_retval[0] = fileid;
1031 free(pathname, M_TEMP);
1036 kern_kldunload(struct thread *td, int fileid, int flags)
1039 struct pmckern_map_out pkm;
1044 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1047 if ((error = priv_check(td, PRIV_KLD_UNLOAD)) != 0)
1051 lf = linker_find_file_by_id(fileid);
1053 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
1055 /* Check if there are DTrace probes enabled on this file. */
1056 if (lf->nenabled > 0) {
1057 printf("kldunload: attempt to unload file that has"
1058 " DTrace probes enabled\n");
1060 } else if (lf->userrefs == 0) {
1062 * XXX: maybe LINKER_UNLOAD_FORCE should override ?
1064 printf("kldunload: attempt to unload file that was"
1065 " loaded by the kernel\n");
1069 /* Save data needed by hwpmc(4) before unloading. */
1070 pkm.pm_address = (uintptr_t) lf->address;
1071 pkm.pm_size = lf->size;
1074 error = linker_file_unload(lf, flags);
1083 PMC_CALL_HOOK(td, PMC_FN_KLD_UNLOAD, (void *) &pkm);
1090 kldunload(struct thread *td, struct kldunload_args *uap)
1093 return (kern_kldunload(td, uap->fileid, LINKER_UNLOAD_NORMAL));
1097 kldunloadf(struct thread *td, struct kldunloadf_args *uap)
1100 if (uap->flags != LINKER_UNLOAD_NORMAL &&
1101 uap->flags != LINKER_UNLOAD_FORCE)
1103 return (kern_kldunload(td, uap->fileid, uap->flags));
1107 kldfind(struct thread *td, struct kldfind_args *uap)
1110 const char *filename;
1115 error = mac_check_kld_stat(td->td_ucred);
1120 td->td_retval[0] = -1;
1122 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1123 if ((error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL)) != 0)
1126 filename = linker_basename(pathname);
1128 lf = linker_find_file_by_name(filename);
1130 td->td_retval[0] = lf->id;
1135 free(pathname, M_TEMP);
1140 kldnext(struct thread *td, struct kldnext_args *uap)
1146 error = mac_check_kld_stat(td->td_ucred);
1152 if (uap->fileid == 0)
1153 lf = TAILQ_FIRST(&linker_files);
1155 lf = linker_find_file_by_id(uap->fileid);
1160 lf = TAILQ_NEXT(lf, link);
1163 /* Skip partially loaded files. */
1164 while (lf != NULL && !(lf->flags & LINKER_FILE_LINKED))
1165 lf = TAILQ_NEXT(lf, link);
1168 td->td_retval[0] = lf->id;
1170 td->td_retval[0] = 0;
1177 kldstat(struct thread *td, struct kldstat_args *uap)
1179 struct kld_file_stat stat;
1181 int error, namelen, version, version_num;
1184 * Check the version of the user's structure.
1186 if ((error = copyin(&uap->stat->version, &version, sizeof(version))) != 0)
1188 if (version == sizeof(struct kld_file_stat_1))
1190 else if (version == sizeof(struct kld_file_stat))
1196 error = mac_check_kld_stat(td->td_ucred);
1202 lf = linker_find_file_by_id(uap->fileid);
1208 /* Version 1 fields: */
1209 namelen = strlen(lf->filename) + 1;
1210 if (namelen > MAXPATHLEN)
1211 namelen = MAXPATHLEN;
1212 bcopy(lf->filename, &stat.name[0], namelen);
1213 stat.refs = lf->refs;
1215 stat.address = lf->address;
1216 stat.size = lf->size;
1217 if (version_num > 1) {
1218 /* Version 2 fields: */
1219 namelen = strlen(lf->pathname) + 1;
1220 if (namelen > MAXPATHLEN)
1221 namelen = MAXPATHLEN;
1222 bcopy(lf->pathname, &stat.pathname[0], namelen);
1226 td->td_retval[0] = 0;
1228 return (copyout(&stat, uap->stat, version));
1232 kldfirstmod(struct thread *td, struct kldfirstmod_args *uap)
1239 error = mac_check_kld_stat(td->td_ucred);
1245 lf = linker_find_file_by_id(uap->fileid);
1248 mp = TAILQ_FIRST(&lf->modules);
1250 td->td_retval[0] = module_getid(mp);
1252 td->td_retval[0] = 0;
1261 kldsym(struct thread *td, struct kldsym_args *uap)
1263 char *symstr = NULL;
1265 linker_symval_t symval;
1267 struct kld_sym_lookup lookup;
1271 error = mac_check_kld_stat(td->td_ucred);
1276 if ((error = copyin(uap->data, &lookup, sizeof(lookup))) != 0)
1278 if (lookup.version != sizeof(lookup) ||
1279 uap->cmd != KLDSYM_LOOKUP)
1281 symstr = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1282 if ((error = copyinstr(lookup.symname, symstr, MAXPATHLEN, NULL)) != 0)
1285 if (uap->fileid != 0) {
1286 lf = linker_find_file_by_id(uap->fileid);
1289 else if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1290 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1291 lookup.symvalue = (uintptr_t) symval.value;
1292 lookup.symsize = symval.size;
1293 error = copyout(&lookup, uap->data, sizeof(lookup));
1297 TAILQ_FOREACH(lf, &linker_files, link) {
1298 if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1299 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1300 lookup.symvalue = (uintptr_t)symval.value;
1301 lookup.symsize = symval.size;
1302 error = copyout(&lookup, uap->data,
1312 free(symstr, M_TEMP);
1317 * Preloaded module support
1321 modlist_lookup(const char *name, int ver)
1325 TAILQ_FOREACH(mod, &found_modules, link) {
1326 if (strcmp(mod->name, name) == 0 &&
1327 (ver == 0 || mod->version == ver))
1334 modlist_lookup2(const char *name, struct mod_depend *verinfo)
1336 modlist_t mod, bestmod;
1339 if (verinfo == NULL)
1340 return (modlist_lookup(name, 0));
1342 TAILQ_FOREACH(mod, &found_modules, link) {
1343 if (strcmp(mod->name, name) != 0)
1346 if (ver == verinfo->md_ver_preferred)
1348 if (ver >= verinfo->md_ver_minimum &&
1349 ver <= verinfo->md_ver_maximum &&
1350 (bestmod == NULL || ver > bestmod->version))
1357 modlist_newmodule(const char *modname, int version, linker_file_t container)
1361 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT | M_ZERO);
1363 panic("no memory for module list");
1364 mod->container = container;
1365 mod->name = modname;
1366 mod->version = version;
1367 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1372 linker_addmodules(linker_file_t lf, struct mod_metadata **start,
1373 struct mod_metadata **stop, int preload)
1375 struct mod_metadata *mp, **mdp;
1376 const char *modname;
1379 for (mdp = start; mdp < stop; mdp++) {
1381 if (mp->md_type != MDT_VERSION)
1383 modname = mp->md_cval;
1384 ver = ((struct mod_version *)mp->md_data)->mv_version;
1385 if (modlist_lookup(modname, ver) != NULL) {
1386 printf("module %s already present!\n", modname);
1387 /* XXX what can we do? this is a build error. :-( */
1390 modlist_newmodule(modname, ver, lf);
1395 linker_preload(void *arg)
1398 const char *modname, *nmodname;
1400 linker_file_t lf, nlf;
1403 linker_file_list_t loaded_files;
1404 linker_file_list_t depended_files;
1405 struct mod_metadata *mp, *nmp;
1406 struct mod_metadata **start, **stop, **mdp, **nmdp;
1407 struct mod_depend *verinfo;
1411 struct sysinit **si_start, **si_stop;
1413 TAILQ_INIT(&loaded_files);
1414 TAILQ_INIT(&depended_files);
1415 TAILQ_INIT(&found_modules);
1419 while ((modptr = preload_search_next_name(modptr)) != NULL) {
1420 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
1421 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
1422 if (modname == NULL) {
1423 printf("Preloaded module at %p does not have a"
1424 " name!\n", modptr);
1427 if (modtype == NULL) {
1428 printf("Preloaded module at %p does not have a type!\n",
1433 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname,
1436 TAILQ_FOREACH(lc, &classes, link) {
1437 error = LINKER_LINK_PRELOAD(lc, modname, &lf);
1443 TAILQ_INSERT_TAIL(&loaded_files, lf, loaded);
1447 * First get a list of stuff in the kernel.
1449 if (linker_file_lookup_set(linker_kernel_file, MDT_SETNAME, &start,
1451 linker_addmodules(linker_kernel_file, start, stop, 1);
1454 * This is a once-off kinky bubble sort to resolve relocation
1455 * dependency requirements.
1458 TAILQ_FOREACH(lf, &loaded_files, loaded) {
1459 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1462 * First, look to see if we would successfully link with this
1465 resolves = 1; /* unless we know otherwise */
1467 for (mdp = start; mdp < stop; mdp++) {
1469 if (mp->md_type != MDT_DEPEND)
1471 modname = mp->md_cval;
1472 verinfo = mp->md_data;
1473 for (nmdp = start; nmdp < stop; nmdp++) {
1475 if (nmp->md_type != MDT_VERSION)
1477 nmodname = nmp->md_cval;
1478 if (strcmp(modname, nmodname) == 0)
1481 if (nmdp < stop) /* it's a self reference */
1485 * ok, the module isn't here yet, we
1488 if (modlist_lookup2(modname, verinfo) == NULL)
1493 * OK, if we found our modules, we can link. So, "provide"
1494 * the modules inside and add it to the end of the link order
1499 for (mdp = start; mdp < stop; mdp++) {
1501 if (mp->md_type != MDT_VERSION)
1503 modname = mp->md_cval;
1504 nver = ((struct mod_version *)
1505 mp->md_data)->mv_version;
1506 if (modlist_lookup(modname,
1508 printf("module %s already"
1509 " present!\n", modname);
1510 TAILQ_REMOVE(&loaded_files,
1512 linker_file_unload(lf,
1513 LINKER_UNLOAD_FORCE);
1514 /* we changed tailq next ptr */
1517 modlist_newmodule(modname, nver, lf);
1520 TAILQ_REMOVE(&loaded_files, lf, loaded);
1521 TAILQ_INSERT_TAIL(&depended_files, lf, loaded);
1523 * Since we provided modules, we need to restart the
1524 * sort so that the previous files that depend on us
1525 * have a chance. Also, we've busted the tailq next
1526 * pointer with the REMOVE.
1533 * At this point, we check to see what could not be resolved..
1535 while ((lf = TAILQ_FIRST(&loaded_files)) != NULL) {
1536 TAILQ_REMOVE(&loaded_files, lf, loaded);
1537 printf("KLD file %s is missing dependencies\n", lf->filename);
1538 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1542 * We made it. Finish off the linking in the order we determined.
1544 TAILQ_FOREACH_SAFE(lf, &depended_files, loaded, nlf) {
1545 if (linker_kernel_file) {
1546 linker_kernel_file->refs++;
1547 error = linker_file_add_dependency(lf,
1548 linker_kernel_file);
1550 panic("cannot add dependency");
1552 lf->userrefs++; /* so we can (try to) kldunload it */
1553 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1556 for (mdp = start; mdp < stop; mdp++) {
1558 if (mp->md_type != MDT_DEPEND)
1560 modname = mp->md_cval;
1561 verinfo = mp->md_data;
1562 mod = modlist_lookup2(modname, verinfo);
1563 /* Don't count self-dependencies */
1564 if (lf == mod->container)
1566 mod->container->refs++;
1567 error = linker_file_add_dependency(lf,
1570 panic("cannot add dependency");
1574 * Now do relocation etc using the symbol search paths
1575 * established by the dependencies
1577 error = LINKER_LINK_PRELOAD_FINISH(lf);
1579 TAILQ_REMOVE(&depended_files, lf, loaded);
1580 printf("KLD file %s - could not finalize loading\n",
1582 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1585 linker_file_register_modules(lf);
1586 if (linker_file_lookup_set(lf, "sysinit_set", &si_start,
1587 &si_stop, NULL) == 0)
1588 sysinit_add(si_start, si_stop);
1589 linker_file_register_sysctls(lf);
1590 lf->flags |= LINKER_FILE_LINKED;
1592 /* woohoo! we made it! */
1595 SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
1598 * Search for a not-loaded module by name.
1600 * Modules may be found in the following locations:
1602 * - preloaded (result is just the module name) - on disk (result is full path
1605 * If the module name is qualified in any way (contains path, etc.) the we
1606 * simply return a copy of it.
1608 * The search path can be manipulated via sysctl. Note that we use the ';'
1609 * character as a separator to be consistent with the bootloader.
1612 static char linker_hintfile[] = "linker.hints";
1613 static char linker_path[MAXPATHLEN] = "/boot/kernel;/boot/modules";
1615 SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RW, linker_path,
1616 sizeof(linker_path), "module load search path");
1618 TUNABLE_STR("module_path", linker_path, sizeof(linker_path));
1620 static char *linker_ext_list[] = {
1627 * Check if file actually exists either with or without extension listed in
1628 * the linker_ext_list. (probably should be generic for the rest of the
1632 linker_lookup_file(const char *path, int pathlen, const char *name,
1633 int namelen, struct vattr *vap)
1635 struct nameidata nd;
1636 struct thread *td = curthread; /* XXX */
1637 char *result, **cpp, *sep;
1638 int error, len, extlen, reclen, flags, vfslocked;
1642 for (cpp = linker_ext_list; *cpp; cpp++) {
1647 extlen++; /* trailing '\0' */
1648 sep = (path[pathlen - 1] != '/') ? "/" : "";
1650 reclen = pathlen + strlen(sep) + namelen + extlen + 1;
1651 result = malloc(reclen, M_LINKER, M_WAITOK);
1652 for (cpp = linker_ext_list; *cpp; cpp++) {
1653 snprintf(result, reclen, "%.*s%s%.*s%s", pathlen, path, sep,
1654 namelen, name, *cpp);
1656 * Attempt to open the file, and return the path if
1657 * we succeed and it's a regular file.
1659 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, result, td);
1661 error = vn_open(&nd, &flags, 0, NULL);
1663 vfslocked = NDHASGIANT(&nd);
1664 NDFREE(&nd, NDF_ONLY_PNBUF);
1665 type = nd.ni_vp->v_type;
1667 VOP_GETATTR(nd.ni_vp, vap, td->td_ucred, td);
1668 VOP_UNLOCK(nd.ni_vp, 0, td);
1669 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
1670 VFS_UNLOCK_GIANT(vfslocked);
1675 free(result, M_LINKER);
1679 #define INT_ALIGN(base, ptr) ptr = \
1680 (base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
1683 * Lookup KLD which contains requested module in the "linker.hints" file. If
1684 * version specification is available, then try to find the best KLD.
1685 * Otherwise just find the latest one.
1688 linker_hints_lookup(const char *path, int pathlen, const char *modname,
1689 int modnamelen, struct mod_depend *verinfo)
1691 struct thread *td = curthread; /* XXX */
1692 struct ucred *cred = td ? td->td_ucred : NULL;
1693 struct nameidata nd;
1694 struct vattr vattr, mattr;
1695 u_char *hints = NULL;
1696 u_char *cp, *recptr, *bufend, *result, *best, *pathbuf, *sep;
1697 int error, ival, bestver, *intp, reclen, found, flags, clen, blen;
1701 bestver = found = 0;
1703 sep = (path[pathlen - 1] != '/') ? "/" : "";
1704 reclen = imax(modnamelen, strlen(linker_hintfile)) + pathlen +
1706 pathbuf = malloc(reclen, M_LINKER, M_WAITOK);
1707 snprintf(pathbuf, reclen, "%.*s%s%s", pathlen, path, sep,
1710 NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE, UIO_SYSSPACE, pathbuf, td);
1712 error = vn_open(&nd, &flags, 0, NULL);
1715 vfslocked = NDHASGIANT(&nd);
1716 NDFREE(&nd, NDF_ONLY_PNBUF);
1717 if (nd.ni_vp->v_type != VREG)
1720 error = VOP_GETATTR(nd.ni_vp, &vattr, cred, td);
1724 * XXX: we need to limit this number to some reasonable value
1726 if (vattr.va_size > 100 * 1024) {
1727 printf("hints file too large %ld\n", (long)vattr.va_size);
1730 hints = malloc(vattr.va_size, M_TEMP, M_WAITOK);
1733 error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t)hints, vattr.va_size, 0,
1734 UIO_SYSSPACE, IO_NODELOCKED, cred, NOCRED, &reclen, td);
1737 VOP_UNLOCK(nd.ni_vp, 0, td);
1738 vn_close(nd.ni_vp, FREAD, cred, td);
1739 VFS_UNLOCK_GIANT(vfslocked);
1742 printf("can't read %d\n", reclen);
1745 intp = (int *)hints;
1747 if (ival != LINKER_HINTS_VERSION) {
1748 printf("hints file version mismatch %d\n", ival);
1751 bufend = hints + vattr.va_size;
1752 recptr = (u_char *)intp;
1754 while (recptr < bufend && !found) {
1755 intp = (int *)recptr;
1762 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
1765 INT_ALIGN(hints, cp);
1769 if (verinfo == NULL ||
1770 ival == verinfo->md_ver_preferred) {
1774 if (ival >= verinfo->md_ver_minimum &&
1775 ival <= verinfo->md_ver_maximum &&
1785 recptr += reclen + sizeof(int);
1788 * Finally check if KLD is in the place
1791 result = linker_lookup_file(path, pathlen, cp, clen, &mattr);
1793 result = linker_lookup_file(path, pathlen, best, blen, &mattr);
1796 * KLD is newer than hints file. What we should do now?
1798 if (result && timespeccmp(&mattr.va_mtime, &vattr.va_mtime, >))
1799 printf("warning: KLD '%s' is newer than the linker.hints"
1802 free(pathbuf, M_LINKER);
1804 free(hints, M_TEMP);
1805 if (nd.ni_vp != NULL) {
1806 VOP_UNLOCK(nd.ni_vp, 0, td);
1807 vn_close(nd.ni_vp, FREAD, cred, td);
1808 VFS_UNLOCK_GIANT(vfslocked);
1811 * If nothing found or hints is absent - fallback to the old
1812 * way by using "kldname[.ko]" as module name.
1814 if (!found && !bestver && result == NULL)
1815 result = linker_lookup_file(path, pathlen, modname,
1821 * Lookup KLD which contains requested module in the all directories.
1824 linker_search_module(const char *modname, int modnamelen,
1825 struct mod_depend *verinfo)
1827 char *cp, *ep, *result;
1830 * traverse the linker path
1832 for (cp = linker_path; *cp; cp = ep + 1) {
1833 /* find the end of this component */
1834 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++);
1835 result = linker_hints_lookup(cp, ep - cp, modname,
1836 modnamelen, verinfo);
1846 * Search for module in all directories listed in the linker_path.
1849 linker_search_kld(const char *name)
1851 char *cp, *ep, *result;
1854 /* qualified at all? */
1855 if (index(name, '/'))
1856 return (linker_strdup(name));
1858 /* traverse the linker path */
1860 for (ep = linker_path; *ep; ep++) {
1862 /* find the end of this component */
1863 for (; *ep != 0 && *ep != ';'; ep++);
1864 result = linker_lookup_file(cp, ep - cp, name, len, NULL);
1872 linker_basename(const char *path)
1874 const char *filename;
1876 filename = rindex(path, '/');
1877 if (filename == NULL)
1886 struct hwpmc_context {
1889 struct pmckern_map_in *kobase;
1893 linker_hwpmc_list_object(linker_file_t lf, void *arg)
1895 struct hwpmc_context *hc;
1899 /* If we run out of mappings, fail. */
1900 if (hc->nobjects >= hc->nmappings)
1903 /* Save the info for this linker file. */
1904 hc->kobase[hc->nobjects].pm_file = lf->filename;
1905 hc->kobase[hc->nobjects].pm_address = (uintptr_t)lf->address;
1911 * Inform hwpmc about the set of kernel modules currently loaded.
1914 linker_hwpmc_list_objects(void)
1916 struct hwpmc_context hc;
1918 hc.nmappings = 15; /* a reasonable default */
1921 /* allocate nmappings+1 entries */
1922 MALLOC(hc.kobase, struct pmckern_map_in *,
1923 (hc.nmappings + 1) * sizeof(struct pmckern_map_in), M_LINKER,
1927 if (linker_file_foreach(linker_hwpmc_list_object, &hc) != 0) {
1928 hc.nmappings = hc.nobjects;
1929 FREE(hc.kobase, M_LINKER);
1933 KASSERT(hc.nobjects > 0, ("linker_hpwmc_list_objects: no kernel "
1936 /* The last entry of the malloced area comprises of all zeros. */
1937 KASSERT(hc.kobase[hc.nobjects].pm_file == NULL,
1938 ("linker_hwpmc_list_objects: last object not NULL"));
1940 return ((void *)hc.kobase);
1945 * Find a file which contains given module and load it, if "parent" is not
1946 * NULL, register a reference to it.
1949 linker_load_module(const char *kldname, const char *modname,
1950 struct linker_file *parent, struct mod_depend *verinfo,
1951 struct linker_file **lfpp)
1953 linker_file_t lfdep;
1954 const char *filename;
1959 if (modname == NULL) {
1961 * We have to load KLD
1963 KASSERT(verinfo == NULL, ("linker_load_module: verinfo"
1965 pathname = linker_search_kld(kldname);
1967 if (modlist_lookup2(modname, verinfo) != NULL)
1969 if (kldname != NULL)
1970 pathname = linker_strdup(kldname);
1971 else if (rootvnode == NULL)
1975 * Need to find a KLD with required module
1977 pathname = linker_search_module(modname,
1978 strlen(modname), verinfo);
1980 if (pathname == NULL)
1984 * Can't load more than one file with the same basename XXX:
1985 * Actually it should be possible to have multiple KLDs with
1986 * the same basename but different path because they can
1987 * provide different versions of the same modules.
1989 filename = linker_basename(pathname);
1990 if (linker_find_file_by_name(filename))
1993 error = linker_load_file(pathname, &lfdep);
1996 if (modname && verinfo &&
1997 modlist_lookup2(modname, verinfo) == NULL) {
1998 linker_file_unload(lfdep, LINKER_UNLOAD_FORCE);
2003 error = linker_file_add_dependency(parent, lfdep);
2010 free(pathname, M_LINKER);
2015 * This routine is responsible for finding dependencies of userland initiated
2016 * kldload(2)'s of files.
2019 linker_load_dependencies(linker_file_t lf)
2021 linker_file_t lfdep;
2022 struct mod_metadata **start, **stop, **mdp, **nmdp;
2023 struct mod_metadata *mp, *nmp;
2024 struct mod_depend *verinfo;
2026 const char *modname, *nmodname;
2027 int ver, error = 0, count;
2030 * All files are dependant on /kernel.
2033 if (linker_kernel_file) {
2034 linker_kernel_file->refs++;
2035 error = linker_file_add_dependency(lf, linker_kernel_file);
2039 if (linker_file_lookup_set(lf, MDT_SETNAME, &start, &stop,
2042 for (mdp = start; mdp < stop; mdp++) {
2044 if (mp->md_type != MDT_VERSION)
2046 modname = mp->md_cval;
2047 ver = ((struct mod_version *)mp->md_data)->mv_version;
2048 mod = modlist_lookup(modname, ver);
2050 printf("interface %s.%d already present in the KLD"
2051 " '%s'!\n", modname, ver,
2052 mod->container->filename);
2057 for (mdp = start; mdp < stop; mdp++) {
2059 if (mp->md_type != MDT_DEPEND)
2061 modname = mp->md_cval;
2062 verinfo = mp->md_data;
2064 for (nmdp = start; nmdp < stop; nmdp++) {
2066 if (nmp->md_type != MDT_VERSION)
2068 nmodname = nmp->md_cval;
2069 if (strcmp(modname, nmodname) == 0)
2072 if (nmdp < stop)/* early exit, it's a self reference */
2074 mod = modlist_lookup2(modname, verinfo);
2075 if (mod) { /* woohoo, it's loaded already */
2076 lfdep = mod->container;
2078 error = linker_file_add_dependency(lf, lfdep);
2083 error = linker_load_module(NULL, modname, lf, verinfo, NULL);
2085 printf("KLD %s: depends on %s - not available\n",
2086 lf->filename, modname);
2093 linker_addmodules(lf, start, stop, 0);
2098 sysctl_kern_function_list_iterate(const char *name, void *opaque)
2100 struct sysctl_req *req;
2103 return (SYSCTL_OUT(req, name, strlen(name) + 1));
2107 * Export a nul-separated, double-nul-terminated list of all function names
2111 sysctl_kern_function_list(SYSCTL_HANDLER_ARGS)
2117 error = mac_check_kld_stat(req->td->td_ucred);
2121 error = sysctl_wire_old_buffer(req, 0);
2125 TAILQ_FOREACH(lf, &linker_files, link) {
2126 error = LINKER_EACH_FUNCTION_NAME(lf,
2127 sysctl_kern_function_list_iterate, req);
2134 return (SYSCTL_OUT(req, "", 1));
2137 SYSCTL_PROC(_kern, OID_AUTO, function_list, CTLFLAG_RD,
2138 NULL, 0, sysctl_kern_function_list, "", "kernel function list");