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/fcntl.h>
50 #include <sys/libkern.h>
51 #include <sys/namei.h>
52 #include <sys/vnode.h>
53 #include <sys/syscallsubr.h>
54 #include <sys/sysctl.h>
58 #include <security/mac/mac_framework.h>
60 #include "linker_if.h"
63 #include <sys/pmckern.h>
68 SYSCTL_INT(_debug, OID_AUTO, kld_debug, CTLFLAG_RW | CTLFLAG_TUN,
69 &kld_debug, 0, "Set various levels of KLD debug");
70 TUNABLE_INT("debug.kld_debug", &kld_debug);
73 #define KLD_LOCK() sx_xlock(&kld_sx)
74 #define KLD_UNLOCK() sx_xunlock(&kld_sx)
75 #define KLD_DOWNGRADE() sx_downgrade(&kld_sx)
76 #define KLD_LOCK_READ() sx_slock(&kld_sx)
77 #define KLD_UNLOCK_READ() sx_sunlock(&kld_sx)
78 #define KLD_LOCKED() sx_xlocked(&kld_sx)
79 #define KLD_LOCK_ASSERT() do { \
81 sx_assert(&kld_sx, SX_XLOCKED); \
85 * static char *linker_search_path(const char *name, struct mod_depend
88 static const char *linker_basename(const char *path);
91 * Find a currently loaded file given its filename.
93 static linker_file_t linker_find_file_by_name(const char* _filename);
96 * Find a currently loaded file given its file id.
98 static linker_file_t linker_find_file_by_id(int _fileid);
100 /* Metadata from the static kernel */
101 SET_DECLARE(modmetadata_set, struct mod_metadata);
103 MALLOC_DEFINE(M_LINKER, "linker", "kernel linker");
105 linker_file_t linker_kernel_file;
107 static struct sx kld_sx; /* kernel linker lock */
110 * Load counter used by clients to determine if a linker file has been
111 * re-loaded. This counter is incremented for each file load.
115 static linker_class_list_t classes;
116 static linker_file_list_t linker_files;
117 static int next_file_id = 1;
118 static int linker_no_more_classes = 0;
120 #define LINKER_GET_NEXT_FILE_ID(a) do { \
121 linker_file_t lftmp; \
125 TAILQ_FOREACH(lftmp, &linker_files, link) { \
126 if (next_file_id == lftmp->id) { \
131 (a) = next_file_id; \
135 /* XXX wrong name; we're looking at version provision tags here, not modules */
136 typedef TAILQ_HEAD(, modlist) modlisthead_t;
138 TAILQ_ENTRY(modlist) link; /* chain together all modules */
139 linker_file_t container;
143 typedef struct modlist *modlist_t;
144 static modlisthead_t found_modules;
146 static int linker_file_add_dependency(linker_file_t file,
148 static caddr_t linker_file_lookup_symbol_internal(linker_file_t file,
149 const char* name, int deps);
150 static int linker_load_module(const char *kldname,
151 const char *modname, struct linker_file *parent,
152 struct mod_depend *verinfo, struct linker_file **lfpp);
153 static modlist_t modlist_lookup2(const char *name, struct mod_depend *verinfo);
156 linker_strdup(const char *str)
160 if ((result = malloc((strlen(str) + 1), M_LINKER, M_WAITOK)) != NULL)
166 linker_init(void *arg)
169 sx_init(&kld_sx, "kernel linker");
170 TAILQ_INIT(&classes);
171 TAILQ_INIT(&linker_files);
174 SYSINIT(linker, SI_SUB_KLD, SI_ORDER_FIRST, linker_init, 0);
177 linker_stop_class_add(void *arg)
180 linker_no_more_classes = 1;
183 SYSINIT(linker_class, SI_SUB_KLD, SI_ORDER_ANY, linker_stop_class_add, NULL);
186 linker_add_class(linker_class_t lc)
190 * We disallow any class registration past SI_ORDER_ANY
191 * of SI_SUB_KLD. We bump the reference count to keep the
192 * ops from being freed.
194 if (linker_no_more_classes == 1)
196 kobj_class_compile((kobj_class_t) lc);
197 ((kobj_class_t)lc)->refs++; /* XXX: kobj_mtx */
198 TAILQ_INSERT_TAIL(&classes, lc, link);
203 linker_file_sysinit(linker_file_t lf)
205 struct sysinit **start, **stop, **sipp, **xipp, *save;
207 KLD_DPF(FILE, ("linker_file_sysinit: calling SYSINITs for %s\n",
210 if (linker_file_lookup_set(lf, "sysinit_set", &start, &stop, NULL) != 0)
213 * Perform a bubble sort of the system initialization objects by
214 * their subsystem (primary key) and order (secondary key).
216 * Since some things care about execution order, this is the operation
217 * which ensures continued function.
219 for (sipp = start; sipp < stop; sipp++) {
220 for (xipp = sipp + 1; xipp < stop; xipp++) {
221 if ((*sipp)->subsystem < (*xipp)->subsystem ||
222 ((*sipp)->subsystem == (*xipp)->subsystem &&
223 (*sipp)->order <= (*xipp)->order))
232 * Traverse the (now) ordered list of system initialization tasks.
233 * Perform each task, and continue on to the next task.
236 for (sipp = start; sipp < stop; sipp++) {
237 if ((*sipp)->subsystem == SI_SUB_DUMMY)
238 continue; /* skip dummy task(s) */
241 (*((*sipp)->func)) ((*sipp)->udata);
247 linker_file_sysuninit(linker_file_t lf)
249 struct sysinit **start, **stop, **sipp, **xipp, *save;
251 KLD_DPF(FILE, ("linker_file_sysuninit: calling SYSUNINITs for %s\n",
254 if (linker_file_lookup_set(lf, "sysuninit_set", &start, &stop,
259 * Perform a reverse bubble sort of the system initialization objects
260 * by their subsystem (primary key) and order (secondary key).
262 * Since some things care about execution order, this is the operation
263 * which ensures continued function.
265 for (sipp = start; sipp < stop; sipp++) {
266 for (xipp = sipp + 1; xipp < stop; xipp++) {
267 if ((*sipp)->subsystem > (*xipp)->subsystem ||
268 ((*sipp)->subsystem == (*xipp)->subsystem &&
269 (*sipp)->order >= (*xipp)->order))
278 * Traverse the (now) ordered list of system initialization tasks.
279 * Perform each task, and continue on to the next task.
282 for (sipp = start; sipp < stop; sipp++) {
283 if ((*sipp)->subsystem == SI_SUB_DUMMY)
284 continue; /* skip dummy task(s) */
287 (*((*sipp)->func)) ((*sipp)->udata);
293 linker_file_register_sysctls(linker_file_t lf)
295 struct sysctl_oid **start, **stop, **oidp;
298 ("linker_file_register_sysctls: registering SYSCTLs for %s\n",
301 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
305 for (oidp = start; oidp < stop; oidp++)
306 sysctl_register_oid(*oidp);
311 linker_file_unregister_sysctls(linker_file_t lf)
313 struct sysctl_oid **start, **stop, **oidp;
315 KLD_DPF(FILE, ("linker_file_unregister_sysctls: unregistering SYSCTLs"
316 " for %s\n", lf->filename));
318 if (linker_file_lookup_set(lf, "sysctl_set", &start, &stop, NULL) != 0)
322 for (oidp = start; oidp < stop; oidp++)
323 sysctl_unregister_oid(*oidp);
328 linker_file_register_modules(linker_file_t lf)
330 struct mod_metadata **start, **stop, **mdp;
331 const moduledata_t *moddata;
332 int first_error, error;
334 KLD_DPF(FILE, ("linker_file_register_modules: registering modules"
335 " in %s\n", lf->filename));
337 if (linker_file_lookup_set(lf, "modmetadata_set", &start,
340 * This fallback should be unnecessary, but if we get booted
341 * from boot2 instead of loader and we are missing our
342 * metadata then we have to try the best we can.
344 if (lf == linker_kernel_file) {
345 start = SET_BEGIN(modmetadata_set);
346 stop = SET_LIMIT(modmetadata_set);
351 for (mdp = start; mdp < stop; mdp++) {
352 if ((*mdp)->md_type != MDT_MODULE)
354 moddata = (*mdp)->md_data;
355 KLD_DPF(FILE, ("Registering module %s in %s\n",
356 moddata->name, lf->filename));
357 error = module_register(moddata, lf);
359 printf("Module %s failed to register: %d\n",
360 moddata->name, error);
361 if (first_error == 0)
365 return (first_error);
369 linker_init_kernel_modules(void)
372 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)
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);
424 linker_file_register_sysctls(lf);
425 linker_file_sysinit(lf);
427 lf->flags |= LINKER_FILE_LINKED;
430 * If all of the modules in this file failed
431 * to load, unload the file and return an
434 if (modules && TAILQ_EMPTY(&lf->modules)) {
435 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
443 * Less than ideal, but tells the user whether it failed to load or
444 * the module was not found.
449 * If the file type has not been recognized by the last try
450 * printout a message before to fail.
453 printf("linker_load_file: Unsupported file type\n");
456 * Format not recognized or otherwise unloadable.
457 * When loading a module that is statically built into
458 * the kernel EEXIST percolates back up as the return
459 * value. Preserve this so that apps like sysinstall
460 * can recognize this special case and not post bogus
466 error = ENOENT; /* Nothing found */
471 linker_reference_module(const char *modname, struct mod_depend *verinfo,
472 linker_file_t *result)
478 if ((mod = modlist_lookup2(modname, verinfo)) != NULL) {
479 *result = mod->container;
485 error = linker_load_module(NULL, modname, NULL, verinfo, result);
491 linker_release_module(const char *modname, struct mod_depend *verinfo,
499 KASSERT(modname != NULL,
500 ("linker_release_module: no file or name"));
501 mod = modlist_lookup2(modname, verinfo);
508 KASSERT(modname == NULL && verinfo == NULL,
509 ("linker_release_module: both file and name"));
510 error = linker_file_unload(lf, LINKER_UNLOAD_NORMAL);
516 linker_find_file_by_name(const char *filename)
521 koname = malloc(strlen(filename) + 4, M_LINKER, M_WAITOK);
522 sprintf(koname, "%s.ko", filename);
525 TAILQ_FOREACH(lf, &linker_files, link) {
526 if (strcmp(lf->filename, koname) == 0)
528 if (strcmp(lf->filename, filename) == 0)
531 free(koname, M_LINKER);
536 linker_find_file_by_id(int fileid)
541 TAILQ_FOREACH(lf, &linker_files, link)
542 if (lf->id == fileid && lf->flags & LINKER_FILE_LINKED)
548 linker_file_foreach(linker_predicate_t *predicate, void *context)
554 TAILQ_FOREACH(lf, &linker_files, link) {
555 retval = predicate(lf, context);
564 linker_make_file(const char *pathname, linker_class_t lc)
567 const char *filename;
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 = linker_strdup(filename);
580 lf->pathname = linker_strdup(pathname);
581 LINKER_GET_NEXT_FILE_ID(lf->id);
584 lf->loadcnt = ++loadcnt;
585 lf->sdt_probes = NULL;
587 STAILQ_INIT(&lf->common);
588 TAILQ_INIT(&lf->modules);
589 TAILQ_INSERT_TAIL(&linker_files, lf, link);
594 linker_file_unload(linker_file_t file, int flags)
597 modlist_t ml, nextml;
598 struct common_symbol *cp;
601 /* Refuse to unload modules if securelevel raised. */
602 if (prison0.pr_securelevel > 0)
606 KLD_DPF(FILE, ("linker_file_unload: lf->refs=%d\n", file->refs));
608 /* Easy case of just dropping a reference. */
609 if (file->refs > 1) {
614 KLD_DPF(FILE, ("linker_file_unload: file is unloading,"
615 " informing modules\n"));
618 * Quiesce all the modules to give them a chance to veto the unload.
621 for (mod = TAILQ_FIRST(&file->modules); mod;
622 mod = module_getfnext(mod)) {
624 error = module_quiesce(mod);
625 if (error != 0 && flags != LINKER_UNLOAD_FORCE) {
626 KLD_DPF(FILE, ("linker_file_unload: module %s"
627 " vetoed unload\n", module_getname(mod)));
629 * XXX: Do we need to tell all the quiesced modules
630 * that they can resume work now via a new module
640 * Inform any modules associated with this file that they are
644 for (mod = TAILQ_FIRST(&file->modules); mod; mod = next) {
645 next = module_getfnext(mod);
649 * Give the module a chance to veto the unload.
651 if ((error = module_unload(mod)) != 0) {
654 KLD_DPF(FILE, ("linker_file_unload: module %s"
655 " failed unload\n", module_getname(mod)));
665 TAILQ_FOREACH_SAFE(ml, &found_modules, link, nextml) {
666 if (ml->container == file) {
667 TAILQ_REMOVE(&found_modules, ml, link);
673 * Don't try to run SYSUNINITs if we are unloaded due to a
676 if (file->flags & LINKER_FILE_LINKED) {
677 file->flags &= ~LINKER_FILE_LINKED;
679 linker_file_sysuninit(file);
680 linker_file_unregister_sysctls(file);
683 TAILQ_REMOVE(&linker_files, file, link);
686 for (i = 0; i < file->ndeps; i++)
687 linker_file_unload(file->deps[i], flags);
688 free(file->deps, M_LINKER);
691 while ((cp = STAILQ_FIRST(&file->common)) != NULL) {
692 STAILQ_REMOVE_HEAD(&file->common, link);
697 if (file->filename) {
698 free(file->filename, M_LINKER);
699 file->filename = NULL;
701 if (file->pathname) {
702 free(file->pathname, M_LINKER);
703 file->pathname = NULL;
705 kobj_delete((kobj_t) file, M_LINKER);
710 linker_ctf_get(linker_file_t file, linker_ctf_t *lc)
712 return (LINKER_CTF_GET(file, lc));
716 linker_file_add_dependency(linker_file_t file, linker_file_t dep)
718 linker_file_t *newdeps;
721 newdeps = malloc((file->ndeps + 1) * sizeof(linker_file_t *),
722 M_LINKER, M_WAITOK | M_ZERO);
727 bcopy(file->deps, newdeps,
728 file->ndeps * sizeof(linker_file_t *));
729 free(file->deps, M_LINKER);
731 file->deps = newdeps;
732 file->deps[file->ndeps] = dep;
734 KLD_DPF(FILE, ("linker_file_add_dependency:"
735 " adding %s as dependency for %s\n",
736 dep->filename, file->filename));
741 * Locate a linker set and its contents. This is a helper function to avoid
742 * linker_if.h exposure elsewhere. Note: firstp and lastp are really void **.
743 * This function is used in this file so we can avoid having lots of (void **)
747 linker_file_lookup_set(linker_file_t file, const char *name,
748 void *firstp, void *lastp, int *countp)
752 locked = KLD_LOCKED();
755 error = LINKER_LOOKUP_SET(file, name, firstp, lastp, countp);
762 * List all functions in a file.
765 linker_file_function_listall(linker_file_t lf,
766 linker_function_nameval_callback_t callback_func, void *arg)
768 return (LINKER_EACH_FUNCTION_NAMEVAL(lf, callback_func, arg));
772 linker_file_lookup_symbol(linker_file_t file, const char *name, int deps)
777 locked = KLD_LOCKED();
780 sym = linker_file_lookup_symbol_internal(file, name, deps);
787 linker_file_lookup_symbol_internal(linker_file_t file, const char *name,
791 linker_symval_t symval;
793 size_t common_size = 0;
797 KLD_DPF(SYM, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n",
800 if (LINKER_LOOKUP_SYMBOL(file, name, &sym) == 0) {
801 LINKER_SYMBOL_VALUES(file, sym, &symval);
802 if (symval.value == 0)
804 * For commons, first look them up in the
805 * dependencies and only allocate space if not found
808 common_size = symval.size;
810 KLD_DPF(SYM, ("linker_file_lookup_symbol: symbol"
811 ".value=%p\n", symval.value));
812 return (symval.value);
816 for (i = 0; i < file->ndeps; i++) {
817 address = linker_file_lookup_symbol_internal(
818 file->deps[i], name, 0);
820 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
821 " deps value=%p\n", address));
826 if (common_size > 0) {
828 * This is a common symbol which was not found in the
829 * dependencies. We maintain a simple common symbol table in
832 struct common_symbol *cp;
834 STAILQ_FOREACH(cp, &file->common, link) {
835 if (strcmp(cp->name, name) == 0) {
836 KLD_DPF(SYM, ("linker_file_lookup_symbol:"
837 " old common value=%p\n", cp->address));
838 return (cp->address);
842 * Round the symbol size up to align.
844 common_size = (common_size + sizeof(int) - 1) & -sizeof(int);
845 cp = malloc(sizeof(struct common_symbol)
846 + common_size + strlen(name) + 1, M_LINKER,
848 cp->address = (caddr_t)(cp + 1);
849 cp->name = cp->address + common_size;
850 strcpy(cp->name, name);
851 bzero(cp->address, common_size);
852 STAILQ_INSERT_TAIL(&file->common, cp, link);
854 KLD_DPF(SYM, ("linker_file_lookup_symbol: new common"
855 " value=%p\n", cp->address));
856 return (cp->address);
858 KLD_DPF(SYM, ("linker_file_lookup_symbol: fail\n"));
863 * Both DDB and stack(9) rely on the kernel linker to provide forward and
864 * backward lookup of symbols. However, DDB and sometimes stack(9) need to
865 * do this in a lockfree manner. We provide a set of internal helper
866 * routines to perform these operations without locks, and then wrappers that
869 * linker_debug_lookup() is ifdef DDB as currently it's only used by DDB.
873 linker_debug_lookup(const char *symstr, c_linker_sym_t *sym)
877 TAILQ_FOREACH(lf, &linker_files, link) {
878 if (LINKER_LOOKUP_SYMBOL(lf, symstr, sym) == 0)
886 linker_debug_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
889 c_linker_sym_t best, es;
890 u_long diff, bestdiff, off;
893 off = (uintptr_t)value;
895 TAILQ_FOREACH(lf, &linker_files, link) {
896 if (LINKER_SEARCH_SYMBOL(lf, value, &es, &diff) != 0)
898 if (es != 0 && diff < bestdiff) {
917 linker_debug_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
921 TAILQ_FOREACH(lf, &linker_files, link) {
922 if (LINKER_SYMBOL_VALUES(lf, sym, symval) == 0)
929 linker_debug_search_symbol_name(caddr_t value, char *buf, u_int buflen,
932 linker_symval_t symval;
937 error = linker_debug_search_symbol(value, &sym, offset);
940 error = linker_debug_symbol_values(sym, &symval);
943 strlcpy(buf, symval.name, buflen);
948 * DDB Helpers. DDB has to look across multiple files with their own symbol
949 * tables and string tables.
951 * Note that we do not obey list locking protocols here. We really don't need
952 * DDB to hang because somebody's got the lock held. We'll take the chance
953 * that the files list is inconsistant instead.
957 linker_ddb_lookup(const char *symstr, c_linker_sym_t *sym)
960 return (linker_debug_lookup(symstr, sym));
965 linker_ddb_search_symbol(caddr_t value, c_linker_sym_t *sym, long *diffp)
968 return (linker_debug_search_symbol(value, sym, diffp));
972 linker_ddb_symbol_values(c_linker_sym_t sym, linker_symval_t *symval)
975 return (linker_debug_symbol_values(sym, symval));
979 linker_ddb_search_symbol_name(caddr_t value, char *buf, u_int buflen,
983 return (linker_debug_search_symbol_name(value, buf, buflen, offset));
987 * stack(9) helper for non-debugging environemnts. Unlike DDB helpers, we do
988 * obey locking protocols, and offer a significantly less complex interface.
991 linker_search_symbol_name(caddr_t value, char *buf, u_int buflen,
997 error = linker_debug_search_symbol_name(value, buf, buflen, offset);
1006 kern_kldload(struct thread *td, const char *file, int *fileid)
1009 struct pmckern_map_in pkm;
1011 const char *kldname, *modname;
1015 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1018 if ((error = priv_check(td, PRIV_KLD_LOAD)) != 0)
1022 * It is possible that kldloaded module will attach a new ifnet,
1023 * so vnet context must be set when this ocurs.
1025 CURVNET_SET(TD_TO_VNET(td));
1028 * If file does not contain a qualified name or any dot in it
1029 * (kldname.ko, or kldname.ver.ko) treat it as an interface
1032 if (strchr(file, '/') || strchr(file, '.')) {
1041 error = linker_load_module(kldname, modname, NULL, NULL, &lf);
1051 pkm.pm_file = lf->filename;
1052 pkm.pm_address = (uintptr_t) lf->address;
1053 PMC_CALL_HOOK(td, PMC_FN_KLD_LOAD, (void *) &pkm);
1065 sys_kldload(struct thread *td, struct kldload_args *uap)
1067 char *pathname = NULL;
1070 td->td_retval[0] = -1;
1072 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1073 error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL);
1075 error = kern_kldload(td, pathname, &fileid);
1077 td->td_retval[0] = fileid;
1079 free(pathname, M_TEMP);
1084 kern_kldunload(struct thread *td, int fileid, int flags)
1087 struct pmckern_map_out pkm;
1092 if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
1095 if ((error = priv_check(td, PRIV_KLD_UNLOAD)) != 0)
1098 CURVNET_SET(TD_TO_VNET(td));
1100 lf = linker_find_file_by_id(fileid);
1102 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf->userrefs));
1104 /* Check if there are DTrace probes enabled on this file. */
1105 if (lf->nenabled > 0) {
1106 printf("kldunload: attempt to unload file that has"
1107 " DTrace probes enabled\n");
1109 } else if (lf->userrefs == 0) {
1111 * XXX: maybe LINKER_UNLOAD_FORCE should override ?
1113 printf("kldunload: attempt to unload file that was"
1114 " loaded by the kernel\n");
1118 /* Save data needed by hwpmc(4) before unloading. */
1119 pkm.pm_address = (uintptr_t) lf->address;
1120 pkm.pm_size = lf->size;
1123 error = linker_file_unload(lf, flags);
1133 PMC_CALL_HOOK(td, PMC_FN_KLD_UNLOAD, (void *) &pkm);
1145 sys_kldunload(struct thread *td, struct kldunload_args *uap)
1148 return (kern_kldunload(td, uap->fileid, LINKER_UNLOAD_NORMAL));
1152 sys_kldunloadf(struct thread *td, struct kldunloadf_args *uap)
1155 if (uap->flags != LINKER_UNLOAD_NORMAL &&
1156 uap->flags != LINKER_UNLOAD_FORCE)
1158 return (kern_kldunload(td, uap->fileid, uap->flags));
1162 sys_kldfind(struct thread *td, struct kldfind_args *uap)
1165 const char *filename;
1170 error = mac_kld_check_stat(td->td_ucred);
1175 td->td_retval[0] = -1;
1177 pathname = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1178 if ((error = copyinstr(uap->file, pathname, MAXPATHLEN, NULL)) != 0)
1181 filename = linker_basename(pathname);
1183 lf = linker_find_file_by_name(filename);
1185 td->td_retval[0] = lf->id;
1190 free(pathname, M_TEMP);
1195 sys_kldnext(struct thread *td, struct kldnext_args *uap)
1201 error = mac_kld_check_stat(td->td_ucred);
1207 if (uap->fileid == 0)
1208 lf = TAILQ_FIRST(&linker_files);
1210 lf = linker_find_file_by_id(uap->fileid);
1215 lf = TAILQ_NEXT(lf, link);
1218 /* Skip partially loaded files. */
1219 while (lf != NULL && !(lf->flags & LINKER_FILE_LINKED))
1220 lf = TAILQ_NEXT(lf, link);
1223 td->td_retval[0] = lf->id;
1225 td->td_retval[0] = 0;
1232 sys_kldstat(struct thread *td, struct kldstat_args *uap)
1234 struct kld_file_stat stat;
1238 * Check the version of the user's structure.
1240 if ((error = copyin(&uap->stat->version, &version, sizeof(version)))
1243 if (version != sizeof(struct kld_file_stat_1) &&
1244 version != sizeof(struct kld_file_stat))
1247 error = kern_kldstat(td, uap->fileid, &stat);
1250 return (copyout(&stat, uap->stat, version));
1254 kern_kldstat(struct thread *td, int fileid, struct kld_file_stat *stat)
1261 error = mac_kld_check_stat(td->td_ucred);
1267 lf = linker_find_file_by_id(fileid);
1273 /* Version 1 fields: */
1274 namelen = strlen(lf->filename) + 1;
1275 if (namelen > MAXPATHLEN)
1276 namelen = MAXPATHLEN;
1277 bcopy(lf->filename, &stat->name[0], namelen);
1278 stat->refs = lf->refs;
1280 stat->address = lf->address;
1281 stat->size = lf->size;
1282 /* Version 2 fields: */
1283 namelen = strlen(lf->pathname) + 1;
1284 if (namelen > MAXPATHLEN)
1285 namelen = MAXPATHLEN;
1286 bcopy(lf->pathname, &stat->pathname[0], namelen);
1289 td->td_retval[0] = 0;
1294 sys_kldfirstmod(struct thread *td, struct kldfirstmod_args *uap)
1301 error = mac_kld_check_stat(td->td_ucred);
1307 lf = linker_find_file_by_id(uap->fileid);
1310 mp = TAILQ_FIRST(&lf->modules);
1312 td->td_retval[0] = module_getid(mp);
1314 td->td_retval[0] = 0;
1323 sys_kldsym(struct thread *td, struct kldsym_args *uap)
1325 char *symstr = NULL;
1327 linker_symval_t symval;
1329 struct kld_sym_lookup lookup;
1333 error = mac_kld_check_stat(td->td_ucred);
1338 if ((error = copyin(uap->data, &lookup, sizeof(lookup))) != 0)
1340 if (lookup.version != sizeof(lookup) ||
1341 uap->cmd != KLDSYM_LOOKUP)
1343 symstr = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1344 if ((error = copyinstr(lookup.symname, symstr, MAXPATHLEN, NULL)) != 0)
1347 if (uap->fileid != 0) {
1348 lf = linker_find_file_by_id(uap->fileid);
1351 else if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1352 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1353 lookup.symvalue = (uintptr_t) symval.value;
1354 lookup.symsize = symval.size;
1355 error = copyout(&lookup, uap->data, sizeof(lookup));
1359 TAILQ_FOREACH(lf, &linker_files, link) {
1360 if (LINKER_LOOKUP_SYMBOL(lf, symstr, &sym) == 0 &&
1361 LINKER_SYMBOL_VALUES(lf, sym, &symval) == 0) {
1362 lookup.symvalue = (uintptr_t)symval.value;
1363 lookup.symsize = symval.size;
1364 error = copyout(&lookup, uap->data,
1374 free(symstr, M_TEMP);
1379 * Preloaded module support
1383 modlist_lookup(const char *name, int ver)
1387 TAILQ_FOREACH(mod, &found_modules, link) {
1388 if (strcmp(mod->name, name) == 0 &&
1389 (ver == 0 || mod->version == ver))
1396 modlist_lookup2(const char *name, struct mod_depend *verinfo)
1398 modlist_t mod, bestmod;
1401 if (verinfo == NULL)
1402 return (modlist_lookup(name, 0));
1404 TAILQ_FOREACH(mod, &found_modules, link) {
1405 if (strcmp(mod->name, name) != 0)
1408 if (ver == verinfo->md_ver_preferred)
1410 if (ver >= verinfo->md_ver_minimum &&
1411 ver <= verinfo->md_ver_maximum &&
1412 (bestmod == NULL || ver > bestmod->version))
1419 modlist_newmodule(const char *modname, int version, linker_file_t container)
1423 mod = malloc(sizeof(struct modlist), M_LINKER, M_NOWAIT | M_ZERO);
1425 panic("no memory for module list");
1426 mod->container = container;
1427 mod->name = modname;
1428 mod->version = version;
1429 TAILQ_INSERT_TAIL(&found_modules, mod, link);
1434 linker_addmodules(linker_file_t lf, struct mod_metadata **start,
1435 struct mod_metadata **stop, int preload)
1437 struct mod_metadata *mp, **mdp;
1438 const char *modname;
1441 for (mdp = start; mdp < stop; mdp++) {
1443 if (mp->md_type != MDT_VERSION)
1445 modname = mp->md_cval;
1446 ver = ((struct mod_version *)mp->md_data)->mv_version;
1447 if (modlist_lookup(modname, ver) != NULL) {
1448 printf("module %s already present!\n", modname);
1449 /* XXX what can we do? this is a build error. :-( */
1452 modlist_newmodule(modname, ver, lf);
1457 linker_preload(void *arg)
1460 const char *modname, *nmodname;
1462 linker_file_t lf, nlf;
1465 linker_file_list_t loaded_files;
1466 linker_file_list_t depended_files;
1467 struct mod_metadata *mp, *nmp;
1468 struct mod_metadata **start, **stop, **mdp, **nmdp;
1469 struct mod_depend *verinfo;
1473 struct sysinit **si_start, **si_stop;
1475 TAILQ_INIT(&loaded_files);
1476 TAILQ_INIT(&depended_files);
1477 TAILQ_INIT(&found_modules);
1481 while ((modptr = preload_search_next_name(modptr)) != NULL) {
1482 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
1483 modtype = (char *)preload_search_info(modptr, MODINFO_TYPE);
1484 if (modname == NULL) {
1485 printf("Preloaded module at %p does not have a"
1486 " name!\n", modptr);
1489 if (modtype == NULL) {
1490 printf("Preloaded module at %p does not have a type!\n",
1495 printf("Preloaded %s \"%s\" at %p.\n", modtype, modname,
1498 TAILQ_FOREACH(lc, &classes, link) {
1499 error = LINKER_LINK_PRELOAD(lc, modname, &lf);
1505 TAILQ_INSERT_TAIL(&loaded_files, lf, loaded);
1509 * First get a list of stuff in the kernel.
1511 if (linker_file_lookup_set(linker_kernel_file, MDT_SETNAME, &start,
1513 linker_addmodules(linker_kernel_file, start, stop, 1);
1516 * This is a once-off kinky bubble sort to resolve relocation
1517 * dependency requirements.
1520 TAILQ_FOREACH(lf, &loaded_files, loaded) {
1521 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1524 * First, look to see if we would successfully link with this
1527 resolves = 1; /* unless we know otherwise */
1529 for (mdp = start; mdp < stop; mdp++) {
1531 if (mp->md_type != MDT_DEPEND)
1533 modname = mp->md_cval;
1534 verinfo = mp->md_data;
1535 for (nmdp = start; nmdp < stop; nmdp++) {
1537 if (nmp->md_type != MDT_VERSION)
1539 nmodname = nmp->md_cval;
1540 if (strcmp(modname, nmodname) == 0)
1543 if (nmdp < stop) /* it's a self reference */
1547 * ok, the module isn't here yet, we
1550 if (modlist_lookup2(modname, verinfo) == NULL)
1555 * OK, if we found our modules, we can link. So, "provide"
1556 * the modules inside and add it to the end of the link order
1561 for (mdp = start; mdp < stop; mdp++) {
1563 if (mp->md_type != MDT_VERSION)
1565 modname = mp->md_cval;
1566 nver = ((struct mod_version *)
1567 mp->md_data)->mv_version;
1568 if (modlist_lookup(modname,
1570 printf("module %s already"
1571 " present!\n", modname);
1572 TAILQ_REMOVE(&loaded_files,
1574 linker_file_unload(lf,
1575 LINKER_UNLOAD_FORCE);
1576 /* we changed tailq next ptr */
1579 modlist_newmodule(modname, nver, lf);
1582 TAILQ_REMOVE(&loaded_files, lf, loaded);
1583 TAILQ_INSERT_TAIL(&depended_files, lf, loaded);
1585 * Since we provided modules, we need to restart the
1586 * sort so that the previous files that depend on us
1587 * have a chance. Also, we've busted the tailq next
1588 * pointer with the REMOVE.
1595 * At this point, we check to see what could not be resolved..
1597 while ((lf = TAILQ_FIRST(&loaded_files)) != NULL) {
1598 TAILQ_REMOVE(&loaded_files, lf, loaded);
1599 printf("KLD file %s is missing dependencies\n", lf->filename);
1600 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1604 * We made it. Finish off the linking in the order we determined.
1606 TAILQ_FOREACH_SAFE(lf, &depended_files, loaded, nlf) {
1607 if (linker_kernel_file) {
1608 linker_kernel_file->refs++;
1609 error = linker_file_add_dependency(lf,
1610 linker_kernel_file);
1612 panic("cannot add dependency");
1614 lf->userrefs++; /* so we can (try to) kldunload it */
1615 error = linker_file_lookup_set(lf, MDT_SETNAME, &start,
1618 for (mdp = start; mdp < stop; mdp++) {
1620 if (mp->md_type != MDT_DEPEND)
1622 modname = mp->md_cval;
1623 verinfo = mp->md_data;
1624 mod = modlist_lookup2(modname, verinfo);
1626 printf("KLD file %s - cannot find "
1627 "dependency \"%s\"\n",
1628 lf->filename, modname);
1631 /* Don't count self-dependencies */
1632 if (lf == mod->container)
1634 mod->container->refs++;
1635 error = linker_file_add_dependency(lf,
1638 panic("cannot add dependency");
1642 * Now do relocation etc using the symbol search paths
1643 * established by the dependencies
1645 error = LINKER_LINK_PRELOAD_FINISH(lf);
1647 printf("KLD file %s - could not finalize loading\n",
1651 linker_file_register_modules(lf);
1652 if (linker_file_lookup_set(lf, "sysinit_set", &si_start,
1653 &si_stop, NULL) == 0)
1654 sysinit_add(si_start, si_stop);
1655 linker_file_register_sysctls(lf);
1656 lf->flags |= LINKER_FILE_LINKED;
1659 TAILQ_REMOVE(&depended_files, lf, loaded);
1660 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
1662 /* woohoo! we made it! */
1665 SYSINIT(preload, SI_SUB_KLD, SI_ORDER_MIDDLE, linker_preload, 0);
1668 * Search for a not-loaded module by name.
1670 * Modules may be found in the following locations:
1672 * - preloaded (result is just the module name) - on disk (result is full path
1675 * If the module name is qualified in any way (contains path, etc.) the we
1676 * simply return a copy of it.
1678 * The search path can be manipulated via sysctl. Note that we use the ';'
1679 * character as a separator to be consistent with the bootloader.
1682 static char linker_hintfile[] = "linker.hints";
1683 static char linker_path[MAXPATHLEN] = "/boot/kernel;/boot/modules";
1685 SYSCTL_STRING(_kern, OID_AUTO, module_path, CTLFLAG_RW, linker_path,
1686 sizeof(linker_path), "module load search path");
1688 TUNABLE_STR("module_path", linker_path, sizeof(linker_path));
1690 static char *linker_ext_list[] = {
1697 * Check if file actually exists either with or without extension listed in
1698 * the linker_ext_list. (probably should be generic for the rest of the
1702 linker_lookup_file(const char *path, int pathlen, const char *name,
1703 int namelen, struct vattr *vap)
1705 struct nameidata nd;
1706 struct thread *td = curthread; /* XXX */
1707 char *result, **cpp, *sep;
1708 int error, len, extlen, reclen, flags, vfslocked;
1712 for (cpp = linker_ext_list; *cpp; cpp++) {
1717 extlen++; /* trailing '\0' */
1718 sep = (path[pathlen - 1] != '/') ? "/" : "";
1720 reclen = pathlen + strlen(sep) + namelen + extlen + 1;
1721 result = malloc(reclen, M_LINKER, M_WAITOK);
1722 for (cpp = linker_ext_list; *cpp; cpp++) {
1723 snprintf(result, reclen, "%.*s%s%.*s%s", pathlen, path, sep,
1724 namelen, name, *cpp);
1726 * Attempt to open the file, and return the path if
1727 * we succeed and it's a regular file.
1729 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, result, td);
1731 error = vn_open(&nd, &flags, 0, NULL);
1733 vfslocked = NDHASGIANT(&nd);
1734 NDFREE(&nd, NDF_ONLY_PNBUF);
1735 type = nd.ni_vp->v_type;
1737 VOP_GETATTR(nd.ni_vp, vap, td->td_ucred);
1738 VOP_UNLOCK(nd.ni_vp, 0);
1739 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
1740 VFS_UNLOCK_GIANT(vfslocked);
1745 free(result, M_LINKER);
1749 #define INT_ALIGN(base, ptr) ptr = \
1750 (base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
1753 * Lookup KLD which contains requested module in the "linker.hints" file. If
1754 * version specification is available, then try to find the best KLD.
1755 * Otherwise just find the latest one.
1758 linker_hints_lookup(const char *path, int pathlen, const char *modname,
1759 int modnamelen, struct mod_depend *verinfo)
1761 struct thread *td = curthread; /* XXX */
1762 struct ucred *cred = td ? td->td_ucred : NULL;
1763 struct nameidata nd;
1764 struct vattr vattr, mattr;
1765 u_char *hints = NULL;
1766 u_char *cp, *recptr, *bufend, *result, *best, *pathbuf, *sep;
1767 int error, ival, bestver, *intp, found, flags, clen, blen;
1772 bestver = found = 0;
1774 sep = (path[pathlen - 1] != '/') ? "/" : "";
1775 reclen = imax(modnamelen, strlen(linker_hintfile)) + pathlen +
1777 pathbuf = malloc(reclen, M_LINKER, M_WAITOK);
1778 snprintf(pathbuf, reclen, "%.*s%s%s", pathlen, path, sep,
1781 NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE, UIO_SYSSPACE, pathbuf, td);
1783 error = vn_open(&nd, &flags, 0, NULL);
1786 vfslocked = NDHASGIANT(&nd);
1787 NDFREE(&nd, NDF_ONLY_PNBUF);
1788 if (nd.ni_vp->v_type != VREG)
1791 error = VOP_GETATTR(nd.ni_vp, &vattr, cred);
1795 * XXX: we need to limit this number to some reasonable value
1797 if (vattr.va_size > 100 * 1024) {
1798 printf("hints file too large %ld\n", (long)vattr.va_size);
1801 hints = malloc(vattr.va_size, M_TEMP, M_WAITOK);
1804 error = vn_rdwr(UIO_READ, nd.ni_vp, (caddr_t)hints, vattr.va_size, 0,
1805 UIO_SYSSPACE, IO_NODELOCKED, cred, NOCRED, &reclen, td);
1808 VOP_UNLOCK(nd.ni_vp, 0);
1809 vn_close(nd.ni_vp, FREAD, cred, td);
1810 VFS_UNLOCK_GIANT(vfslocked);
1813 printf("can't read %zd\n", reclen);
1816 intp = (int *)hints;
1818 if (ival != LINKER_HINTS_VERSION) {
1819 printf("hints file version mismatch %d\n", ival);
1822 bufend = hints + vattr.va_size;
1823 recptr = (u_char *)intp;
1825 while (recptr < bufend && !found) {
1826 intp = (int *)recptr;
1833 if (clen != modnamelen || bcmp(cp, modname, clen) != 0)
1836 INT_ALIGN(hints, cp);
1840 if (verinfo == NULL ||
1841 ival == verinfo->md_ver_preferred) {
1845 if (ival >= verinfo->md_ver_minimum &&
1846 ival <= verinfo->md_ver_maximum &&
1856 recptr += reclen + sizeof(int);
1859 * Finally check if KLD is in the place
1862 result = linker_lookup_file(path, pathlen, cp, clen, &mattr);
1864 result = linker_lookup_file(path, pathlen, best, blen, &mattr);
1867 * KLD is newer than hints file. What we should do now?
1869 if (result && timespeccmp(&mattr.va_mtime, &vattr.va_mtime, >))
1870 printf("warning: KLD '%s' is newer than the linker.hints"
1873 free(pathbuf, M_LINKER);
1875 free(hints, M_TEMP);
1876 if (nd.ni_vp != NULL) {
1877 VOP_UNLOCK(nd.ni_vp, 0);
1878 vn_close(nd.ni_vp, FREAD, cred, td);
1879 VFS_UNLOCK_GIANT(vfslocked);
1882 * If nothing found or hints is absent - fallback to the old
1883 * way by using "kldname[.ko]" as module name.
1885 if (!found && !bestver && result == NULL)
1886 result = linker_lookup_file(path, pathlen, modname,
1892 * Lookup KLD which contains requested module in the all directories.
1895 linker_search_module(const char *modname, int modnamelen,
1896 struct mod_depend *verinfo)
1898 char *cp, *ep, *result;
1901 * traverse the linker path
1903 for (cp = linker_path; *cp; cp = ep + 1) {
1904 /* find the end of this component */
1905 for (ep = cp; (*ep != 0) && (*ep != ';'); ep++);
1906 result = linker_hints_lookup(cp, ep - cp, modname,
1907 modnamelen, verinfo);
1917 * Search for module in all directories listed in the linker_path.
1920 linker_search_kld(const char *name)
1922 char *cp, *ep, *result;
1925 /* qualified at all? */
1926 if (strchr(name, '/'))
1927 return (linker_strdup(name));
1929 /* traverse the linker path */
1931 for (ep = linker_path; *ep; ep++) {
1933 /* find the end of this component */
1934 for (; *ep != 0 && *ep != ';'; ep++);
1935 result = linker_lookup_file(cp, ep - cp, name, len, NULL);
1943 linker_basename(const char *path)
1945 const char *filename;
1947 filename = strrchr(path, '/');
1948 if (filename == NULL)
1957 * Inform hwpmc about the set of kernel modules currently loaded.
1960 linker_hwpmc_list_objects(void)
1963 struct pmckern_map_in *kobase;
1968 TAILQ_FOREACH(lf, &linker_files, link)
1971 /* Allocate nmappings + 1 entries. */
1972 kobase = malloc((nmappings + 1) * sizeof(struct pmckern_map_in),
1973 M_LINKER, M_WAITOK | M_ZERO);
1975 TAILQ_FOREACH(lf, &linker_files, link) {
1977 /* Save the info for this linker file. */
1978 kobase[i].pm_file = lf->filename;
1979 kobase[i].pm_address = (uintptr_t)lf->address;
1984 KASSERT(i > 0, ("linker_hpwmc_list_objects: no kernel objects?"));
1986 /* The last entry of the malloced area comprises of all zeros. */
1987 KASSERT(kobase[i].pm_file == NULL,
1988 ("linker_hwpmc_list_objects: last object not NULL"));
1990 return ((void *)kobase);
1995 * Find a file which contains given module and load it, if "parent" is not
1996 * NULL, register a reference to it.
1999 linker_load_module(const char *kldname, const char *modname,
2000 struct linker_file *parent, struct mod_depend *verinfo,
2001 struct linker_file **lfpp)
2003 linker_file_t lfdep;
2004 const char *filename;
2009 if (modname == NULL) {
2011 * We have to load KLD
2013 KASSERT(verinfo == NULL, ("linker_load_module: verinfo"
2015 pathname = linker_search_kld(kldname);
2017 if (modlist_lookup2(modname, verinfo) != NULL)
2019 if (kldname != NULL)
2020 pathname = linker_strdup(kldname);
2021 else if (rootvnode == NULL)
2025 * Need to find a KLD with required module
2027 pathname = linker_search_module(modname,
2028 strlen(modname), verinfo);
2030 if (pathname == NULL)
2034 * Can't load more than one file with the same basename XXX:
2035 * Actually it should be possible to have multiple KLDs with
2036 * the same basename but different path because they can
2037 * provide different versions of the same modules.
2039 filename = linker_basename(pathname);
2040 if (linker_find_file_by_name(filename))
2043 error = linker_load_file(pathname, &lfdep);
2046 if (modname && verinfo &&
2047 modlist_lookup2(modname, verinfo) == NULL) {
2048 linker_file_unload(lfdep, LINKER_UNLOAD_FORCE);
2053 error = linker_file_add_dependency(parent, lfdep);
2060 free(pathname, M_LINKER);
2065 * This routine is responsible for finding dependencies of userland initiated
2066 * kldload(2)'s of files.
2069 linker_load_dependencies(linker_file_t lf)
2071 linker_file_t lfdep;
2072 struct mod_metadata **start, **stop, **mdp, **nmdp;
2073 struct mod_metadata *mp, *nmp;
2074 struct mod_depend *verinfo;
2076 const char *modname, *nmodname;
2077 int ver, error = 0, count;
2080 * All files are dependant on /kernel.
2083 if (linker_kernel_file) {
2084 linker_kernel_file->refs++;
2085 error = linker_file_add_dependency(lf, linker_kernel_file);
2089 if (linker_file_lookup_set(lf, MDT_SETNAME, &start, &stop,
2092 for (mdp = start; mdp < stop; mdp++) {
2094 if (mp->md_type != MDT_VERSION)
2096 modname = mp->md_cval;
2097 ver = ((struct mod_version *)mp->md_data)->mv_version;
2098 mod = modlist_lookup(modname, ver);
2100 printf("interface %s.%d already present in the KLD"
2101 " '%s'!\n", modname, ver,
2102 mod->container->filename);
2107 for (mdp = start; mdp < stop; mdp++) {
2109 if (mp->md_type != MDT_DEPEND)
2111 modname = mp->md_cval;
2112 verinfo = mp->md_data;
2114 for (nmdp = start; nmdp < stop; nmdp++) {
2116 if (nmp->md_type != MDT_VERSION)
2118 nmodname = nmp->md_cval;
2119 if (strcmp(modname, nmodname) == 0)
2122 if (nmdp < stop)/* early exit, it's a self reference */
2124 mod = modlist_lookup2(modname, verinfo);
2125 if (mod) { /* woohoo, it's loaded already */
2126 lfdep = mod->container;
2128 error = linker_file_add_dependency(lf, lfdep);
2133 error = linker_load_module(NULL, modname, lf, verinfo, NULL);
2135 printf("KLD %s: depends on %s - not available or"
2136 " version mismatch\n", lf->filename, modname);
2143 linker_addmodules(lf, start, stop, 0);
2148 sysctl_kern_function_list_iterate(const char *name, void *opaque)
2150 struct sysctl_req *req;
2153 return (SYSCTL_OUT(req, name, strlen(name) + 1));
2157 * Export a nul-separated, double-nul-terminated list of all function names
2161 sysctl_kern_function_list(SYSCTL_HANDLER_ARGS)
2167 error = mac_kld_check_stat(req->td->td_ucred);
2171 error = sysctl_wire_old_buffer(req, 0);
2175 TAILQ_FOREACH(lf, &linker_files, link) {
2176 error = LINKER_EACH_FUNCTION_NAME(lf,
2177 sysctl_kern_function_list_iterate, req);
2184 return (SYSCTL_OUT(req, "", 1));
2187 SYSCTL_PROC(_kern, OID_AUTO, function_list, CTLTYPE_OPAQUE | CTLFLAG_RD,
2188 NULL, 0, sysctl_kern_function_list, "", "kernel function list");