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 * Inform any modules associated with this file.
593 for (mod
= TAILQ_FIRST(&file
->modules
); mod
; mod
= next
) {
594 next
= module_getfnext(mod
);
598 * Give the module a chance to veto the unload.
600 if ((error
= module_unload(mod
, flags
)) != 0) {
601 KLD_DPF(FILE, ("linker_file_unload: module %p"
602 " vetoes unload\n", mod
));
610 TAILQ_FOREACH_SAFE(ml
, &found_modules
, link
, nextml
) {
611 if (ml
->container
== file
) {
612 TAILQ_REMOVE(&found_modules
, ml
, link
);
618 * Don't try to run SYSUNINITs if we are unloaded due to a
621 if (file
->flags
& LINKER_FILE_LINKED
) {
622 linker_file_sysuninit(file
);
623 linker_file_unregister_sysctls(file
);
625 TAILQ_REMOVE(&linker_files
, file
, link
);
628 for (i
= 0; i
< file
->ndeps
; i
++)
629 linker_file_unload(file
->deps
[i
], flags
);
630 free(file
->deps
, M_LINKER
);
633 while ((cp
= STAILQ_FIRST(&file
->common
)) != NULL
) {
634 STAILQ_REMOVE_HEAD(&file
->common
, link
);
639 if (file
->filename
) {
640 free(file
->filename
, M_LINKER
);
641 file
->filename
= NULL
;
643 if (file
->pathname
) {
644 free(file
->pathname
, M_LINKER
);
645 file
->pathname
= NULL
;
647 kobj_delete((kobj_t
) file
, M_LINKER
);
652 linker_ctf_get(linker_file_t file
, linker_ctf_t
*lc
)
654 return (LINKER_CTF_GET(file
, lc
));
658 linker_file_add_dependency(linker_file_t file
, linker_file_t dep
)
660 linker_file_t
*newdeps
;
663 newdeps
= malloc((file
->ndeps
+ 1) * sizeof(linker_file_t
*),
664 M_LINKER
, M_WAITOK
| M_ZERO
);
669 bcopy(file
->deps
, newdeps
,
670 file
->ndeps
* sizeof(linker_file_t
*));
671 free(file
->deps
, M_LINKER
);
673 file
->deps
= newdeps
;
674 file
->deps
[file
->ndeps
] = dep
;
680 * Locate a linker set and its contents. This is a helper function to avoid
681 * linker_if.h exposure elsewhere. Note: firstp and lastp are really void **.
682 * This function is used in this file so we can avoid having lots of (void **)
686 linker_file_lookup_set(linker_file_t file
, const char *name
,
687 void *firstp
, void *lastp
, int *countp
)
691 locked
= KLD_LOCKED();
694 error
= LINKER_LOOKUP_SET(file
, name
, firstp
, lastp
, countp
);
701 * List all functions in a file.
704 linker_file_function_listall(linker_file_t lf
,
705 linker_function_nameval_callback_t callback_func
, void *arg
)
707 return (LINKER_EACH_FUNCTION_NAMEVAL(lf
, callback_func
, arg
));
711 linker_file_lookup_symbol(linker_file_t file
, const char *name
, int deps
)
716 locked
= KLD_LOCKED();
719 sym
= linker_file_lookup_symbol_internal(file
, name
, deps
);
726 linker_file_lookup_symbol_internal(linker_file_t file
, const char *name
,
730 linker_symval_t symval
;
732 size_t common_size
= 0;
736 KLD_DPF(SYM
, ("linker_file_lookup_symbol: file=%p, name=%s, deps=%d\n",
739 if (LINKER_LOOKUP_SYMBOL(file
, name
, &sym
) == 0) {
740 LINKER_SYMBOL_VALUES(file
, sym
, &symval
);
741 if (symval
.value
== 0)
743 * For commons, first look them up in the
744 * dependencies and only allocate space if not found
747 common_size
= symval
.size
;
749 KLD_DPF(SYM
, ("linker_file_lookup_symbol: symbol"
750 ".value=%p\n", symval
.value
));
751 return (symval
.value
);
755 for (i
= 0; i
< file
->ndeps
; i
++) {
756 address
= linker_file_lookup_symbol_internal(
757 file
->deps
[i
], name
, 0);
759 KLD_DPF(SYM
, ("linker_file_lookup_symbol:"
760 " deps value=%p\n", address
));
765 if (common_size
> 0) {
767 * This is a common symbol which was not found in the
768 * dependencies. We maintain a simple common symbol table in
771 struct common_symbol
*cp
;
773 STAILQ_FOREACH(cp
, &file
->common
, link
) {
774 if (strcmp(cp
->name
, name
) == 0) {
775 KLD_DPF(SYM
, ("linker_file_lookup_symbol:"
776 " old common value=%p\n", cp
->address
));
777 return (cp
->address
);
781 * Round the symbol size up to align.
783 common_size
= (common_size
+ sizeof(int) - 1) & -sizeof(int);
784 cp
= malloc(sizeof(struct common_symbol
)
785 + common_size
+ strlen(name
) + 1, M_LINKER
,
787 cp
->address
= (caddr_t
)(cp
+ 1);
788 cp
->name
= cp
->address
+ common_size
;
789 strcpy(cp
->name
, name
);
790 bzero(cp
->address
, common_size
);
791 STAILQ_INSERT_TAIL(&file
->common
, cp
, link
);
793 KLD_DPF(SYM
, ("linker_file_lookup_symbol: new common"
794 " value=%p\n", cp
->address
));
795 return (cp
->address
);
797 KLD_DPF(SYM
, ("linker_file_lookup_symbol: fail\n"));
802 * Both DDB and stack(9) rely on the kernel linker to provide forward and
803 * backward lookup of symbols. However, DDB and sometimes stack(9) need to
804 * do this in a lockfree manner. We provide a set of internal helper
805 * routines to perform these operations without locks, and then wrappers that
808 * linker_debug_lookup() is ifdef DDB as currently it's only used by DDB.
812 linker_debug_lookup(const char *symstr
, c_linker_sym_t
*sym
)
816 TAILQ_FOREACH(lf
, &linker_files
, link
) {
817 if (LINKER_LOOKUP_SYMBOL(lf
, symstr
, sym
) == 0)
825 linker_debug_search_symbol(caddr_t value
, c_linker_sym_t
*sym
, long *diffp
)
828 c_linker_sym_t best
, es
;
829 u_long diff
, bestdiff
, off
;
832 off
= (uintptr_t)value
;
834 TAILQ_FOREACH(lf
, &linker_files
, link
) {
835 if (LINKER_SEARCH_SYMBOL(lf
, value
, &es
, &diff
) != 0)
837 if (es
!= 0 && diff
< bestdiff
) {
856 linker_debug_symbol_values(c_linker_sym_t sym
, linker_symval_t
*symval
)
860 TAILQ_FOREACH(lf
, &linker_files
, link
) {
861 if (LINKER_SYMBOL_VALUES(lf
, sym
, symval
) == 0)
868 linker_debug_search_symbol_name(caddr_t value
, char *buf
, u_int buflen
,
871 linker_symval_t symval
;
876 error
= linker_debug_search_symbol(value
, &sym
, offset
);
879 error
= linker_debug_symbol_values(sym
, &symval
);
882 strlcpy(buf
, symval
.name
, buflen
);
888 * DDB Helpers. DDB has to look across multiple files with their own symbol
889 * tables and string tables.
891 * Note that we do not obey list locking protocols here. We really don't need
892 * DDB to hang because somebody's got the lock held. We'll take the chance
893 * that the files list is inconsistant instead.
896 linker_ddb_lookup(const char *symstr
, c_linker_sym_t
*sym
)
899 return (linker_debug_lookup(symstr
, sym
));
903 linker_ddb_search_symbol(caddr_t value
, c_linker_sym_t
*sym
, long *diffp
)
906 return (linker_debug_search_symbol(value
, sym
, diffp
));
910 linker_ddb_symbol_values(c_linker_sym_t sym
, linker_symval_t
*symval
)
913 return (linker_debug_symbol_values(sym
, symval
));
917 linker_ddb_search_symbol_name(caddr_t value
, char *buf
, u_int buflen
,
921 return (linker_debug_search_symbol_name(value
, buf
, buflen
, offset
));
926 * stack(9) helper for non-debugging environemnts. Unlike DDB helpers, we do
927 * obey locking protocols, and offer a significantly less complex interface.
930 linker_search_symbol_name(caddr_t value
, char *buf
, u_int buflen
,
936 error
= linker_debug_search_symbol_name(value
, buf
, buflen
, offset
);
945 kern_kldload(struct thread
*td
, const char *file
, int *fileid
)
948 struct pmckern_map_in pkm
;
950 const char *kldname
, *modname
;
954 if ((error
= securelevel_gt(td
->td_ucred
, 0)) != 0)
957 if ((error
= priv_check(td
, PRIV_KLD_LOAD
)) != 0)
961 * If file does not contain a qualified name or any dot in it
962 * (kldname.ko, or kldname.ver.ko) treat it as an interface
965 if (index(file
, '/') || index(file
, '.')) {
974 error
= linker_load_module(kldname
, modname
, NULL
, NULL
, &lf
);
978 pkm
.pm_file
= lf
->filename
;
979 pkm
.pm_address
= (uintptr_t) lf
->address
;
980 PMC_CALL_HOOK(td
, PMC_FN_KLD_LOAD
, (void *) &pkm
);
991 kldload(struct thread
*td
, struct kldload_args
*uap
)
993 char *pathname
= NULL
;
996 td
->td_retval
[0] = -1;
998 pathname
= malloc(MAXPATHLEN
, M_TEMP
, M_WAITOK
);
999 error
= copyinstr(uap
->file
, pathname
, MAXPATHLEN
, NULL
);
1001 error
= kern_kldload(td
, pathname
, &fileid
);
1003 td
->td_retval
[0] = fileid
;
1005 free(pathname
, M_TEMP
);
1010 kern_kldunload(struct thread
*td
, int fileid
, int flags
)
1013 struct pmckern_map_out pkm
;
1018 if ((error
= securelevel_gt(td
->td_ucred
, 0)) != 0)
1021 if ((error
= priv_check(td
, PRIV_KLD_UNLOAD
)) != 0)
1025 lf
= linker_find_file_by_id(fileid
);
1027 KLD_DPF(FILE, ("kldunload: lf->userrefs=%d\n", lf
->userrefs
));
1029 /* Check if there are DTrace probes enabled on this file. */
1030 if (lf
->nenabled
> 0) {
1031 printf("kldunload: attempt to unload file that has"
1032 " DTrace probes enabled\n");
1034 } else if (lf
->userrefs
== 0) {
1036 * XXX: maybe LINKER_UNLOAD_FORCE should override ?
1038 printf("kldunload: attempt to unload file that was"
1039 " loaded by the kernel\n");
1043 /* Save data needed by hwpmc(4) before unloading. */
1044 pkm
.pm_address
= (uintptr_t) lf
->address
;
1045 pkm
.pm_size
= lf
->size
;
1048 error
= linker_file_unload(lf
, flags
);
1057 PMC_CALL_HOOK(td
, PMC_FN_KLD_UNLOAD
, (void *) &pkm
);
1064 kldunload(struct thread
*td
, struct kldunload_args
*uap
)
1067 return (kern_kldunload(td
, uap
->fileid
, LINKER_UNLOAD_NORMAL
));
1071 kldunloadf(struct thread
*td
, struct kldunloadf_args
*uap
)
1074 if (uap
->flags
!= LINKER_UNLOAD_NORMAL
&&
1075 uap
->flags
!= LINKER_UNLOAD_FORCE
)
1077 return (kern_kldunload(td
, uap
->fileid
, uap
->flags
));
1081 kldfind(struct thread
*td
, struct kldfind_args
*uap
)
1084 const char *filename
;
1089 error
= mac_kld_check_stat(td
->td_ucred
);
1094 td
->td_retval
[0] = -1;
1096 pathname
= malloc(MAXPATHLEN
, M_TEMP
, M_WAITOK
);
1097 if ((error
= copyinstr(uap
->file
, pathname
, MAXPATHLEN
, NULL
)) != 0)
1100 filename
= linker_basename(pathname
);
1102 lf
= linker_find_file_by_name(filename
);
1104 td
->td_retval
[0] = lf
->id
;
1109 free(pathname
, M_TEMP
);
1114 kldnext(struct thread
*td
, struct kldnext_args
*uap
)
1120 error
= mac_kld_check_stat(td
->td_ucred
);
1126 if (uap
->fileid
== 0)
1127 lf
= TAILQ_FIRST(&linker_files
);
1129 lf
= linker_find_file_by_id(uap
->fileid
);
1134 lf
= TAILQ_NEXT(lf
, link
);
1137 /* Skip partially loaded files. */
1138 while (lf
!= NULL
&& !(lf
->flags
& LINKER_FILE_LINKED
))
1139 lf
= TAILQ_NEXT(lf
, link
);
1142 td
->td_retval
[0] = lf
->id
;
1144 td
->td_retval
[0] = 0;
1151 kldstat(struct thread
*td
, struct kldstat_args
*uap
)
1153 struct kld_file_stat stat
;
1155 int error
, namelen
, version
, version_num
;
1158 * Check the version of the user's structure.
1160 if ((error
= copyin(&uap
->stat
->version
, &version
, sizeof(version
))) != 0)
1162 if (version
== sizeof(struct kld_file_stat_1
))
1164 else if (version
== sizeof(struct kld_file_stat
))
1170 error
= mac_kld_check_stat(td
->td_ucred
);
1176 lf
= linker_find_file_by_id(uap
->fileid
);
1182 /* Version 1 fields: */
1183 namelen
= strlen(lf
->filename
) + 1;
1184 if (namelen
> MAXPATHLEN
)
1185 namelen
= MAXPATHLEN
;
1186 bcopy(lf
->filename
, &stat
.name
[0], namelen
);
1187 stat
.refs
= lf
->refs
;
1189 stat
.address
= lf
->address
;
1190 stat
.size
= lf
->size
;
1191 if (version_num
> 1) {
1192 /* Version 2 fields: */
1193 namelen
= strlen(lf
->pathname
) + 1;
1194 if (namelen
> MAXPATHLEN
)
1195 namelen
= MAXPATHLEN
;
1196 bcopy(lf
->pathname
, &stat
.pathname
[0], namelen
);
1200 td
->td_retval
[0] = 0;
1202 return (copyout(&stat
, uap
->stat
, version
));
1206 kldfirstmod(struct thread
*td
, struct kldfirstmod_args
*uap
)
1213 error
= mac_kld_check_stat(td
->td_ucred
);
1219 lf
= linker_find_file_by_id(uap
->fileid
);
1222 mp
= TAILQ_FIRST(&lf
->modules
);
1224 td
->td_retval
[0] = module_getid(mp
);
1226 td
->td_retval
[0] = 0;
1235 kldsym(struct thread
*td
, struct kldsym_args
*uap
)
1237 char *symstr
= NULL
;
1239 linker_symval_t symval
;
1241 struct kld_sym_lookup lookup
;
1245 error
= mac_kld_check_stat(td
->td_ucred
);
1250 if ((error
= copyin(uap
->data
, &lookup
, sizeof(lookup
))) != 0)
1252 if (lookup
.version
!= sizeof(lookup
) ||
1253 uap
->cmd
!= KLDSYM_LOOKUP
)
1255 symstr
= malloc(MAXPATHLEN
, M_TEMP
, M_WAITOK
);
1256 if ((error
= copyinstr(lookup
.symname
, symstr
, MAXPATHLEN
, NULL
)) != 0)
1259 if (uap
->fileid
!= 0) {
1260 lf
= linker_find_file_by_id(uap
->fileid
);
1263 else if (LINKER_LOOKUP_SYMBOL(lf
, symstr
, &sym
) == 0 &&
1264 LINKER_SYMBOL_VALUES(lf
, sym
, &symval
) == 0) {
1265 lookup
.symvalue
= (uintptr_t) symval
.value
;
1266 lookup
.symsize
= symval
.size
;
1267 error
= copyout(&lookup
, uap
->data
, sizeof(lookup
));
1271 TAILQ_FOREACH(lf
, &linker_files
, link
) {
1272 if (LINKER_LOOKUP_SYMBOL(lf
, symstr
, &sym
) == 0 &&
1273 LINKER_SYMBOL_VALUES(lf
, sym
, &symval
) == 0) {
1274 lookup
.symvalue
= (uintptr_t)symval
.value
;
1275 lookup
.symsize
= symval
.size
;
1276 error
= copyout(&lookup
, uap
->data
,
1286 free(symstr
, M_TEMP
);
1291 * Preloaded module support
1295 modlist_lookup(const char *name
, int ver
)
1299 TAILQ_FOREACH(mod
, &found_modules
, link
) {
1300 if (strcmp(mod
->name
, name
) == 0 &&
1301 (ver
== 0 || mod
->version
== ver
))
1308 modlist_lookup2(const char *name
, struct mod_depend
*verinfo
)
1310 modlist_t mod
, bestmod
;
1313 if (verinfo
== NULL
)
1314 return (modlist_lookup(name
, 0));
1316 TAILQ_FOREACH(mod
, &found_modules
, link
) {
1317 if (strcmp(mod
->name
, name
) != 0)
1320 if (ver
== verinfo
->md_ver_preferred
)
1322 if (ver
>= verinfo
->md_ver_minimum
&&
1323 ver
<= verinfo
->md_ver_maximum
&&
1324 (bestmod
== NULL
|| ver
> bestmod
->version
))
1331 modlist_newmodule(const char *modname
, int version
, linker_file_t container
)
1335 mod
= malloc(sizeof(struct modlist
), M_LINKER
, M_NOWAIT
| M_ZERO
);
1337 panic("no memory for module list");
1338 mod
->container
= container
;
1339 mod
->name
= modname
;
1340 mod
->version
= version
;
1341 TAILQ_INSERT_TAIL(&found_modules
, mod
, link
);
1346 linker_addmodules(linker_file_t lf
, struct mod_metadata
**start
,
1347 struct mod_metadata
**stop
, int preload
)
1349 struct mod_metadata
*mp
, **mdp
;
1350 const char *modname
;
1353 for (mdp
= start
; mdp
< stop
; mdp
++) {
1355 if (mp
->md_type
!= MDT_VERSION
)
1357 modname
= mp
->md_cval
;
1358 ver
= ((struct mod_version
*)mp
->md_data
)->mv_version
;
1359 if (modlist_lookup(modname
, ver
) != NULL
) {
1360 printf("module %s already present!\n", modname
);
1361 /* XXX what can we do? this is a build error. :-( */
1364 modlist_newmodule(modname
, ver
, lf
);
1369 linker_preload(void *arg
)
1372 const char *modname
, *nmodname
;
1374 linker_file_t lf
, nlf
;
1377 linker_file_list_t loaded_files
;
1378 linker_file_list_t depended_files
;
1379 struct mod_metadata
*mp
, *nmp
;
1380 struct mod_metadata
**start
, **stop
, **mdp
, **nmdp
;
1381 struct mod_depend
*verinfo
;
1385 struct sysinit
**si_start
, **si_stop
;
1387 TAILQ_INIT(&loaded_files
);
1388 TAILQ_INIT(&depended_files
);
1389 TAILQ_INIT(&found_modules
);
1393 while ((modptr
= preload_search_next_name(modptr
)) != NULL
) {
1394 modname
= (char *)preload_search_info(modptr
, MODINFO_NAME
);
1395 modtype
= (char *)preload_search_info(modptr
, MODINFO_TYPE
);
1396 if (modname
== NULL
) {
1397 printf("Preloaded module at %p does not have a"
1398 " name!\n", modptr
);
1401 if (modtype
== NULL
) {
1402 printf("Preloaded module at %p does not have a type!\n",
1407 printf("Preloaded %s \"%s\" at %p.\n", modtype
, modname
,
1410 TAILQ_FOREACH(lc
, &classes
, link
) {
1411 error
= LINKER_LINK_PRELOAD(lc
, modname
, &lf
);
1417 TAILQ_INSERT_TAIL(&loaded_files
, lf
, loaded
);
1421 * First get a list of stuff in the kernel.
1423 if (linker_file_lookup_set(linker_kernel_file
, MDT_SETNAME
, &start
,
1425 linker_addmodules(linker_kernel_file
, start
, stop
, 1);
1428 * This is a once-off kinky bubble sort to resolve relocation
1429 * dependency requirements.
1432 TAILQ_FOREACH(lf
, &loaded_files
, loaded
) {
1433 error
= linker_file_lookup_set(lf
, MDT_SETNAME
, &start
,
1436 * First, look to see if we would successfully link with this
1439 resolves
= 1; /* unless we know otherwise */
1441 for (mdp
= start
; mdp
< stop
; mdp
++) {
1443 if (mp
->md_type
!= MDT_DEPEND
)
1445 modname
= mp
->md_cval
;
1446 verinfo
= mp
->md_data
;
1447 for (nmdp
= start
; nmdp
< stop
; nmdp
++) {
1449 if (nmp
->md_type
!= MDT_VERSION
)
1451 nmodname
= nmp
->md_cval
;
1452 if (strcmp(modname
, nmodname
) == 0)
1455 if (nmdp
< stop
) /* it's a self reference */
1459 * ok, the module isn't here yet, we
1462 if (modlist_lookup2(modname
, verinfo
) == NULL
)
1467 * OK, if we found our modules, we can link. So, "provide"
1468 * the modules inside and add it to the end of the link order
1473 for (mdp
= start
; mdp
< stop
; mdp
++) {
1475 if (mp
->md_type
!= MDT_VERSION
)
1477 modname
= mp
->md_cval
;
1478 nver
= ((struct mod_version
*)
1479 mp
->md_data
)->mv_version
;
1480 if (modlist_lookup(modname
,
1482 printf("module %s already"
1483 " present!\n", modname
);
1484 TAILQ_REMOVE(&loaded_files
,
1486 linker_file_unload(lf
,
1487 LINKER_UNLOAD_FORCE
);
1488 /* we changed tailq next ptr */
1491 modlist_newmodule(modname
, nver
, lf
);
1494 TAILQ_REMOVE(&loaded_files
, lf
, loaded
);
1495 TAILQ_INSERT_TAIL(&depended_files
, lf
, loaded
);
1497 * Since we provided modules, we need to restart the
1498 * sort so that the previous files that depend on us
1499 * have a chance. Also, we've busted the tailq next
1500 * pointer with the REMOVE.
1507 * At this point, we check to see what could not be resolved..
1509 while ((lf
= TAILQ_FIRST(&loaded_files
)) != NULL
) {
1510 TAILQ_REMOVE(&loaded_files
, lf
, loaded
);
1511 printf("KLD file %s is missing dependencies\n", lf
->filename
);
1512 linker_file_unload(lf
, LINKER_UNLOAD_FORCE
);
1516 * We made it. Finish off the linking in the order we determined.
1518 TAILQ_FOREACH_SAFE(lf
, &depended_files
, loaded
, nlf
) {
1519 if (linker_kernel_file
) {
1520 linker_kernel_file
->refs
++;
1521 error
= linker_file_add_dependency(lf
,
1522 linker_kernel_file
);
1524 panic("cannot add dependency");
1526 lf
->userrefs
++; /* so we can (try to) kldunload it */
1527 error
= linker_file_lookup_set(lf
, MDT_SETNAME
, &start
,
1530 for (mdp
= start
; mdp
< stop
; mdp
++) {
1532 if (mp
->md_type
!= MDT_DEPEND
)
1534 modname
= mp
->md_cval
;
1535 verinfo
= mp
->md_data
;
1536 mod
= modlist_lookup2(modname
, verinfo
);
1537 /* Don't count self-dependencies */
1538 if (lf
== mod
->container
)
1540 mod
->container
->refs
++;
1541 error
= linker_file_add_dependency(lf
,
1544 panic("cannot add dependency");
1548 * Now do relocation etc using the symbol search paths
1549 * established by the dependencies
1551 error
= LINKER_LINK_PRELOAD_FINISH(lf
);
1553 TAILQ_REMOVE(&depended_files
, lf
, loaded
);
1554 printf("KLD file %s - could not finalize loading\n",
1556 linker_file_unload(lf
, LINKER_UNLOAD_FORCE
);
1559 linker_file_register_modules(lf
);
1560 if (linker_file_lookup_set(lf
, "sysinit_set", &si_start
,
1561 &si_stop
, NULL
) == 0)
1562 sysinit_add(si_start
, si_stop
);
1563 linker_file_register_sysctls(lf
);
1564 lf
->flags
|= LINKER_FILE_LINKED
;
1566 /* woohoo! we made it! */
1569 SYSINIT(preload
, SI_SUB_KLD
, SI_ORDER_MIDDLE
, linker_preload
, 0);
1572 * Search for a not-loaded module by name.
1574 * Modules may be found in the following locations:
1576 * - preloaded (result is just the module name) - on disk (result is full path
1579 * If the module name is qualified in any way (contains path, etc.) the we
1580 * simply return a copy of it.
1582 * The search path can be manipulated via sysctl. Note that we use the ';'
1583 * character as a separator to be consistent with the bootloader.
1586 static char linker_hintfile
[] = "linker.hints";
1587 static char linker_path
[MAXPATHLEN
] = "/boot/kernel;/boot/modules";
1589 SYSCTL_STRING(_kern
, OID_AUTO
, module_path
, CTLFLAG_RW
, linker_path
,
1590 sizeof(linker_path
), "module load search path");
1592 TUNABLE_STR("module_path", linker_path
, sizeof(linker_path
));
1594 static char *linker_ext_list
[] = {
1601 * Check if file actually exists either with or without extension listed in
1602 * the linker_ext_list. (probably should be generic for the rest of the
1606 linker_lookup_file(const char *path
, int pathlen
, const char *name
,
1607 int namelen
, struct vattr
*vap
)
1609 struct nameidata nd
;
1610 struct thread
*td
= curthread
; /* XXX */
1611 char *result
, **cpp
, *sep
;
1612 int error
, len
, extlen
, reclen
, flags
, vfslocked
;
1616 for (cpp
= linker_ext_list
; *cpp
; cpp
++) {
1621 extlen
++; /* trailing '\0' */
1622 sep
= (path
[pathlen
- 1] != '/') ? "/" : "";
1624 reclen
= pathlen
+ strlen(sep
) + namelen
+ extlen
+ 1;
1625 result
= malloc(reclen
, M_LINKER
, M_WAITOK
);
1626 for (cpp
= linker_ext_list
; *cpp
; cpp
++) {
1627 snprintf(result
, reclen
, "%.*s%s%.*s%s", pathlen
, path
, sep
,
1628 namelen
, name
, *cpp
);
1630 * Attempt to open the file, and return the path if
1631 * we succeed and it's a regular file.
1633 NDINIT(&nd
, LOOKUP
, FOLLOW
| MPSAFE
, UIO_SYSSPACE
, result
, td
);
1635 error
= vn_open(&nd
, &flags
, 0, NULL
);
1637 vfslocked
= NDHASGIANT(&nd
);
1638 NDFREE(&nd
, NDF_ONLY_PNBUF
);
1639 type
= nd
.ni_vp
->v_type
;
1641 VOP_GETATTR(nd
.ni_vp
, vap
, td
->td_ucred
);
1642 VOP_UNLOCK(nd
.ni_vp
, 0);
1643 vn_close(nd
.ni_vp
, FREAD
, td
->td_ucred
, td
);
1644 VFS_UNLOCK_GIANT(vfslocked
);
1649 free(result
, M_LINKER
);
1653 #define INT_ALIGN(base, ptr) ptr = \
1654 (base) + (((ptr) - (base) + sizeof(int) - 1) & ~(sizeof(int) - 1))
1657 * Lookup KLD which contains requested module in the "linker.hints" file. If
1658 * version specification is available, then try to find the best KLD.
1659 * Otherwise just find the latest one.
1662 linker_hints_lookup(const char *path
, int pathlen
, const char *modname
,
1663 int modnamelen
, struct mod_depend
*verinfo
)
1665 struct thread
*td
= curthread
; /* XXX */
1666 struct ucred
*cred
= td
? td
->td_ucred
: NULL
;
1667 struct nameidata nd
;
1668 struct vattr vattr
, mattr
;
1669 u_char
*hints
= NULL
;
1670 u_char
*cp
, *recptr
, *bufend
, *result
, *best
, *pathbuf
, *sep
;
1671 int error
, ival
, bestver
, *intp
, reclen
, found
, flags
, clen
, blen
;
1675 bestver
= found
= 0;
1677 sep
= (path
[pathlen
- 1] != '/') ? "/" : "";
1678 reclen
= imax(modnamelen
, strlen(linker_hintfile
)) + pathlen
+
1680 pathbuf
= malloc(reclen
, M_LINKER
, M_WAITOK
);
1681 snprintf(pathbuf
, reclen
, "%.*s%s%s", pathlen
, path
, sep
,
1684 NDINIT(&nd
, LOOKUP
, NOFOLLOW
| MPSAFE
, UIO_SYSSPACE
, pathbuf
, td
);
1686 error
= vn_open(&nd
, &flags
, 0, NULL
);
1689 vfslocked
= NDHASGIANT(&nd
);
1690 NDFREE(&nd
, NDF_ONLY_PNBUF
);
1691 if (nd
.ni_vp
->v_type
!= VREG
)
1694 error
= VOP_GETATTR(nd
.ni_vp
, &vattr
, cred
);
1698 * XXX: we need to limit this number to some reasonable value
1700 if (vattr
.va_size
> 100 * 1024) {
1701 printf("hints file too large %ld\n", (long)vattr
.va_size
);
1704 hints
= malloc(vattr
.va_size
, M_TEMP
, M_WAITOK
);
1707 error
= vn_rdwr(UIO_READ
, nd
.ni_vp
, (caddr_t
)hints
, vattr
.va_size
, 0,
1708 UIO_SYSSPACE
, IO_NODELOCKED
, cred
, NOCRED
, &reclen
, td
);
1711 VOP_UNLOCK(nd
.ni_vp
, 0);
1712 vn_close(nd
.ni_vp
, FREAD
, cred
, td
);
1713 VFS_UNLOCK_GIANT(vfslocked
);
1716 printf("can't read %d\n", reclen
);
1719 intp
= (int *)hints
;
1721 if (ival
!= LINKER_HINTS_VERSION
) {
1722 printf("hints file version mismatch %d\n", ival
);
1725 bufend
= hints
+ vattr
.va_size
;
1726 recptr
= (u_char
*)intp
;
1728 while (recptr
< bufend
&& !found
) {
1729 intp
= (int *)recptr
;
1736 if (clen
!= modnamelen
|| bcmp(cp
, modname
, clen
) != 0)
1739 INT_ALIGN(hints
, cp
);
1743 if (verinfo
== NULL
||
1744 ival
== verinfo
->md_ver_preferred
) {
1748 if (ival
>= verinfo
->md_ver_minimum
&&
1749 ival
<= verinfo
->md_ver_maximum
&&
1759 recptr
+= reclen
+ sizeof(int);
1762 * Finally check if KLD is in the place
1765 result
= linker_lookup_file(path
, pathlen
, cp
, clen
, &mattr
);
1767 result
= linker_lookup_file(path
, pathlen
, best
, blen
, &mattr
);
1770 * KLD is newer than hints file. What we should do now?
1772 if (result
&& timespeccmp(&mattr
.va_mtime
, &vattr
.va_mtime
, >))
1773 printf("warning: KLD '%s' is newer than the linker.hints"
1776 free(pathbuf
, M_LINKER
);
1778 free(hints
, M_TEMP
);
1779 if (nd
.ni_vp
!= NULL
) {
1780 VOP_UNLOCK(nd
.ni_vp
, 0);
1781 vn_close(nd
.ni_vp
, FREAD
, cred
, td
);
1782 VFS_UNLOCK_GIANT(vfslocked
);
1785 * If nothing found or hints is absent - fallback to the old
1786 * way by using "kldname[.ko]" as module name.
1788 if (!found
&& !bestver
&& result
== NULL
)
1789 result
= linker_lookup_file(path
, pathlen
, modname
,
1795 * Lookup KLD which contains requested module in the all directories.
1798 linker_search_module(const char *modname
, int modnamelen
,
1799 struct mod_depend
*verinfo
)
1801 char *cp
, *ep
, *result
;
1804 * traverse the linker path
1806 for (cp
= linker_path
; *cp
; cp
= ep
+ 1) {
1807 /* find the end of this component */
1808 for (ep
= cp
; (*ep
!= 0) && (*ep
!= ';'); ep
++);
1809 result
= linker_hints_lookup(cp
, ep
- cp
, modname
,
1810 modnamelen
, verinfo
);
1820 * Search for module in all directories listed in the linker_path.
1823 linker_search_kld(const char *name
)
1825 char *cp
, *ep
, *result
;
1828 /* qualified at all? */
1829 if (index(name
, '/'))
1830 return (linker_strdup(name
));
1832 /* traverse the linker path */
1834 for (ep
= linker_path
; *ep
; ep
++) {
1836 /* find the end of this component */
1837 for (; *ep
!= 0 && *ep
!= ';'; ep
++);
1838 result
= linker_lookup_file(cp
, ep
- cp
, name
, len
, NULL
);
1846 linker_basename(const char *path
)
1848 const char *filename
;
1850 filename
= rindex(path
, '/');
1851 if (filename
== NULL
)
1860 struct hwpmc_context
{
1863 struct pmckern_map_in
*kobase
;
1867 linker_hwpmc_list_object(linker_file_t lf
, void *arg
)
1869 struct hwpmc_context
*hc
;
1873 /* If we run out of mappings, fail. */
1874 if (hc
->nobjects
>= hc
->nmappings
)
1877 /* Save the info for this linker file. */
1878 hc
->kobase
[hc
->nobjects
].pm_file
= lf
->filename
;
1879 hc
->kobase
[hc
->nobjects
].pm_address
= (uintptr_t)lf
->address
;
1885 * Inform hwpmc about the set of kernel modules currently loaded.
1888 linker_hwpmc_list_objects(void)
1890 struct hwpmc_context hc
;
1892 hc
.nmappings
= 15; /* a reasonable default */
1895 /* allocate nmappings+1 entries */
1896 MALLOC(hc
.kobase
, struct pmckern_map_in
*,
1897 (hc
.nmappings
+ 1) * sizeof(struct pmckern_map_in
), M_LINKER
,
1901 if (linker_file_foreach(linker_hwpmc_list_object
, &hc
) != 0) {
1902 hc
.nmappings
= hc
.nobjects
;
1903 FREE(hc
.kobase
, M_LINKER
);
1907 KASSERT(hc
.nobjects
> 0, ("linker_hpwmc_list_objects: no kernel "
1910 /* The last entry of the malloced area comprises of all zeros. */
1911 KASSERT(hc
.kobase
[hc
.nobjects
].pm_file
== NULL
,
1912 ("linker_hwpmc_list_objects: last object not NULL"));
1914 return ((void *)hc
.kobase
);
1919 * Find a file which contains given module and load it, if "parent" is not
1920 * NULL, register a reference to it.
1923 linker_load_module(const char *kldname
, const char *modname
,
1924 struct linker_file
*parent
, struct mod_depend
*verinfo
,
1925 struct linker_file
**lfpp
)
1927 linker_file_t lfdep
;
1928 const char *filename
;
1933 if (modname
== NULL
) {
1935 * We have to load KLD
1937 KASSERT(verinfo
== NULL
, ("linker_load_module: verinfo"
1939 pathname
= linker_search_kld(kldname
);
1941 if (modlist_lookup2(modname
, verinfo
) != NULL
)
1943 if (kldname
!= NULL
)
1944 pathname
= linker_strdup(kldname
);
1945 else if (rootvnode
== NULL
)
1949 * Need to find a KLD with required module
1951 pathname
= linker_search_module(modname
,
1952 strlen(modname
), verinfo
);
1954 if (pathname
== NULL
)
1958 * Can't load more than one file with the same basename XXX:
1959 * Actually it should be possible to have multiple KLDs with
1960 * the same basename but different path because they can
1961 * provide different versions of the same modules.
1963 filename
= linker_basename(pathname
);
1964 if (linker_find_file_by_name(filename
))
1967 error
= linker_load_file(pathname
, &lfdep
);
1970 if (modname
&& verinfo
&&
1971 modlist_lookup2(modname
, verinfo
) == NULL
) {
1972 linker_file_unload(lfdep
, LINKER_UNLOAD_FORCE
);
1977 error
= linker_file_add_dependency(parent
, lfdep
);
1984 free(pathname
, M_LINKER
);
1989 * This routine is responsible for finding dependencies of userland initiated
1990 * kldload(2)'s of files.
1993 linker_load_dependencies(linker_file_t lf
)
1995 linker_file_t lfdep
;
1996 struct mod_metadata
**start
, **stop
, **mdp
, **nmdp
;
1997 struct mod_metadata
*mp
, *nmp
;
1998 struct mod_depend
*verinfo
;
2000 const char *modname
, *nmodname
;
2001 int ver
, error
= 0, count
;
2004 * All files are dependant on /kernel.
2007 if (linker_kernel_file
) {
2008 linker_kernel_file
->refs
++;
2009 error
= linker_file_add_dependency(lf
, linker_kernel_file
);
2013 if (linker_file_lookup_set(lf
, MDT_SETNAME
, &start
, &stop
,
2016 for (mdp
= start
; mdp
< stop
; mdp
++) {
2018 if (mp
->md_type
!= MDT_VERSION
)
2020 modname
= mp
->md_cval
;
2021 ver
= ((struct mod_version
*)mp
->md_data
)->mv_version
;
2022 mod
= modlist_lookup(modname
, ver
);
2024 printf("interface %s.%d already present in the KLD"
2025 " '%s'!\n", modname
, ver
,
2026 mod
->container
->filename
);
2031 for (mdp
= start
; mdp
< stop
; mdp
++) {
2033 if (mp
->md_type
!= MDT_DEPEND
)
2035 modname
= mp
->md_cval
;
2036 verinfo
= mp
->md_data
;
2038 for (nmdp
= start
; nmdp
< stop
; nmdp
++) {
2040 if (nmp
->md_type
!= MDT_VERSION
)
2042 nmodname
= nmp
->md_cval
;
2043 if (strcmp(modname
, nmodname
) == 0)
2046 if (nmdp
< stop
)/* early exit, it's a self reference */
2048 mod
= modlist_lookup2(modname
, verinfo
);
2049 if (mod
) { /* woohoo, it's loaded already */
2050 lfdep
= mod
->container
;
2052 error
= linker_file_add_dependency(lf
, lfdep
);
2057 error
= linker_load_module(NULL
, modname
, lf
, verinfo
, NULL
);
2059 printf("KLD %s: depends on %s - not available\n",
2060 lf
->filename
, modname
);
2067 linker_addmodules(lf
, start
, stop
, 0);
2072 sysctl_kern_function_list_iterate(const char *name
, void *opaque
)
2074 struct sysctl_req
*req
;
2077 return (SYSCTL_OUT(req
, name
, strlen(name
) + 1));
2081 * Export a nul-separated, double-nul-terminated list of all function names
2085 sysctl_kern_function_list(SYSCTL_HANDLER_ARGS
)
2091 error
= mac_kld_check_stat(req
->td
->td_ucred
);
2095 error
= sysctl_wire_old_buffer(req
, 0);
2099 TAILQ_FOREACH(lf
, &linker_files
, link
) {
2100 error
= LINKER_EACH_FUNCTION_NAME(lf
,
2101 sysctl_kern_function_list_iterate
, req
);
2108 return (SYSCTL_OUT(req
, "", 1));
2111 SYSCTL_PROC(_kern
, OID_AUTO
, function_list
, CTLFLAG_RD
,
2112 NULL
, 0, sysctl_kern_function_list
, "", "kernel function list");