2 Copyright (C) 2002 Richard Henderson
3 Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #include <linux/module.h>
20 #include <linux/moduleloader.h>
21 #include <linux/init.h>
22 #include <linux/kallsyms.h>
23 #include <linux/sysfs.h>
24 #include <linux/kernel.h>
25 #include <linux/slab.h>
26 #include <linux/vmalloc.h>
27 #include <linux/elf.h>
28 #include <linux/seq_file.h>
29 #include <linux/syscalls.h>
30 #include <linux/fcntl.h>
31 #include <linux/rcupdate.h>
32 #include <linux/capability.h>
33 #include <linux/cpu.h>
34 #include <linux/moduleparam.h>
35 #include <linux/errno.h>
36 #include <linux/err.h>
37 #include <linux/vermagic.h>
38 #include <linux/notifier.h>
39 #include <linux/sched.h>
40 #include <linux/stop_machine.h>
41 #include <linux/device.h>
42 #include <linux/string.h>
43 #include <linux/mutex.h>
44 #include <linux/unwind.h>
45 #include <asm/uaccess.h>
46 #include <asm/cacheflush.h>
47 #include <linux/license.h>
48 #include <asm/sections.h>
53 #define DEBUGP(fmt , a...)
56 #ifndef ARCH_SHF_SMALL
57 #define ARCH_SHF_SMALL 0
60 /* If this is set, the section belongs in the init part of the module */
61 #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
63 /* List of modules, protected by module_mutex or preempt_disable
64 * (add/delete uses stop_machine). */
65 static DEFINE_MUTEX(module_mutex);
66 static LIST_HEAD(modules);
68 /* Waiting for a module to finish initializing? */
69 static DECLARE_WAIT_QUEUE_HEAD(module_wq);
71 static BLOCKING_NOTIFIER_HEAD(module_notify_list);
73 /* Bounds of module allocation, for speeding __module_text_address */
74 static unsigned long module_addr_min = -1UL, module_addr_max = 0;
76 int register_module_notifier(struct notifier_block * nb)
78 return blocking_notifier_chain_register(&module_notify_list, nb);
80 EXPORT_SYMBOL(register_module_notifier);
82 int unregister_module_notifier(struct notifier_block * nb)
84 return blocking_notifier_chain_unregister(&module_notify_list, nb);
86 EXPORT_SYMBOL(unregister_module_notifier);
88 /* We require a truly strong try_module_get(): 0 means failure due to
89 ongoing or failed initialization etc. */
90 static inline int strong_try_module_get(struct module *mod)
92 if (mod && mod->state == MODULE_STATE_COMING)
94 if (try_module_get(mod))
100 static inline void add_taint_module(struct module *mod, unsigned flag)
107 * A thread that wants to hold a reference to a module only while it
108 * is running can call this to safely exit. nfsd and lockd use this.
110 void __module_put_and_exit(struct module *mod, long code)
115 EXPORT_SYMBOL(__module_put_and_exit);
117 /* Find a module section: 0 means not found. */
118 static unsigned int find_sec(Elf_Ehdr *hdr,
120 const char *secstrings,
125 for (i = 1; i < hdr->e_shnum; i++)
126 /* Alloc bit cleared means "ignore it." */
127 if ((sechdrs[i].sh_flags & SHF_ALLOC)
128 && strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
133 /* Provided by the linker */
134 extern const struct kernel_symbol __start___ksymtab[];
135 extern const struct kernel_symbol __stop___ksymtab[];
136 extern const struct kernel_symbol __start___ksymtab_gpl[];
137 extern const struct kernel_symbol __stop___ksymtab_gpl[];
138 extern const struct kernel_symbol __start___ksymtab_gpl_future[];
139 extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
140 extern const struct kernel_symbol __start___ksymtab_gpl_future[];
141 extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
142 extern const unsigned long __start___kcrctab[];
143 extern const unsigned long __start___kcrctab_gpl[];
144 extern const unsigned long __start___kcrctab_gpl_future[];
145 #ifdef CONFIG_UNUSED_SYMBOLS
146 extern const struct kernel_symbol __start___ksymtab_unused[];
147 extern const struct kernel_symbol __stop___ksymtab_unused[];
148 extern const struct kernel_symbol __start___ksymtab_unused_gpl[];
149 extern const struct kernel_symbol __stop___ksymtab_unused_gpl[];
150 extern const unsigned long __start___kcrctab_unused[];
151 extern const unsigned long __start___kcrctab_unused_gpl[];
154 #ifndef CONFIG_MODVERSIONS
155 #define symversion(base, idx) NULL
157 #define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL)
161 const struct kernel_symbol *start, *stop;
162 const unsigned long *crcs;
171 static bool each_symbol_in_section(const struct symsearch *arr,
172 unsigned int arrsize,
173 struct module *owner,
174 bool (*fn)(const struct symsearch *syms,
175 struct module *owner,
176 unsigned int symnum, void *data),
181 for (j = 0; j < arrsize; j++) {
182 for (i = 0; i < arr[j].stop - arr[j].start; i++)
183 if (fn(&arr[j], owner, i, data))
190 /* Returns true as soon as fn returns true, otherwise false. */
191 static bool each_symbol(bool (*fn)(const struct symsearch *arr,
192 struct module *owner,
193 unsigned int symnum, void *data),
197 const struct symsearch arr[] = {
198 { __start___ksymtab, __stop___ksymtab, __start___kcrctab,
199 NOT_GPL_ONLY, false },
200 { __start___ksymtab_gpl, __stop___ksymtab_gpl,
201 __start___kcrctab_gpl,
203 { __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future,
204 __start___kcrctab_gpl_future,
205 WILL_BE_GPL_ONLY, false },
206 #ifdef CONFIG_UNUSED_SYMBOLS
207 { __start___ksymtab_unused, __stop___ksymtab_unused,
208 __start___kcrctab_unused,
209 NOT_GPL_ONLY, true },
210 { __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl,
211 __start___kcrctab_unused_gpl,
216 if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data))
219 list_for_each_entry(mod, &modules, list) {
220 struct symsearch arr[] = {
221 { mod->syms, mod->syms + mod->num_syms, mod->crcs,
222 NOT_GPL_ONLY, false },
223 { mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms,
226 { mod->gpl_future_syms,
227 mod->gpl_future_syms + mod->num_gpl_future_syms,
228 mod->gpl_future_crcs,
229 WILL_BE_GPL_ONLY, false },
230 #ifdef CONFIG_UNUSED_SYMBOLS
232 mod->unused_syms + mod->num_unused_syms,
234 NOT_GPL_ONLY, true },
235 { mod->unused_gpl_syms,
236 mod->unused_gpl_syms + mod->num_unused_gpl_syms,
237 mod->unused_gpl_crcs,
242 if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data))
248 struct find_symbol_arg {
255 struct module *owner;
256 const unsigned long *crc;
260 static bool find_symbol_in_section(const struct symsearch *syms,
261 struct module *owner,
262 unsigned int symnum, void *data)
264 struct find_symbol_arg *fsa = data;
266 if (strcmp(syms->start[symnum].name, fsa->name) != 0)
270 if (syms->licence == GPL_ONLY)
272 if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) {
273 printk(KERN_WARNING "Symbol %s is being used "
274 "by a non-GPL module, which will not "
275 "be allowed in the future\n", fsa->name);
276 printk(KERN_WARNING "Please see the file "
277 "Documentation/feature-removal-schedule.txt "
278 "in the kernel source tree for more details.\n");
282 #ifdef CONFIG_UNUSED_SYMBOLS
283 if (syms->unused && fsa->warn) {
284 printk(KERN_WARNING "Symbol %s is marked as UNUSED, "
285 "however this module is using it.\n", fsa->name);
287 "This symbol will go away in the future.\n");
289 "Please evalute if this is the right api to use and if "
290 "it really is, submit a report the linux kernel "
291 "mailinglist together with submitting your code for "
297 fsa->crc = symversion(syms->crcs, symnum);
298 fsa->value = syms->start[symnum].value;
302 /* Find a symbol, return value, (optional) crc and (optional) module
304 static unsigned long find_symbol(const char *name,
305 struct module **owner,
306 const unsigned long **crc,
310 struct find_symbol_arg fsa;
316 if (each_symbol(find_symbol_in_section, &fsa)) {
324 DEBUGP("Failed to find symbol %s\n", name);
328 /* lookup symbol in given range of kernel_symbols */
329 static const struct kernel_symbol *lookup_symbol(const char *name,
330 const struct kernel_symbol *start,
331 const struct kernel_symbol *stop)
333 const struct kernel_symbol *ks = start;
334 for (; ks < stop; ks++)
335 if (strcmp(ks->name, name) == 0)
340 /* Search for module by name: must hold module_mutex. */
341 static struct module *find_module(const char *name)
345 list_for_each_entry(mod, &modules, list) {
346 if (strcmp(mod->name, name) == 0)
353 /* Number of blocks used and allocated. */
354 static unsigned int pcpu_num_used, pcpu_num_allocated;
355 /* Size of each block. -ve means used. */
356 static int *pcpu_size;
358 static int split_block(unsigned int i, unsigned short size)
360 /* Reallocation required? */
361 if (pcpu_num_used + 1 > pcpu_num_allocated) {
364 new = krealloc(pcpu_size, sizeof(new[0])*pcpu_num_allocated*2,
369 pcpu_num_allocated *= 2;
373 /* Insert a new subblock */
374 memmove(&pcpu_size[i+1], &pcpu_size[i],
375 sizeof(pcpu_size[0]) * (pcpu_num_used - i));
378 pcpu_size[i+1] -= size;
383 static inline unsigned int block_size(int val)
390 static void *percpu_modalloc(unsigned long size, unsigned long align,
397 if (align > PAGE_SIZE) {
398 printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
399 name, align, PAGE_SIZE);
403 ptr = __per_cpu_start;
404 for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
405 /* Extra for alignment requirement. */
406 extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
407 BUG_ON(i == 0 && extra != 0);
409 if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
412 /* Transfer extra to previous block. */
413 if (pcpu_size[i-1] < 0)
414 pcpu_size[i-1] -= extra;
416 pcpu_size[i-1] += extra;
417 pcpu_size[i] -= extra;
420 /* Split block if warranted */
421 if (pcpu_size[i] - size > sizeof(unsigned long))
422 if (!split_block(i, size))
426 pcpu_size[i] = -pcpu_size[i];
430 printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
435 static void percpu_modfree(void *freeme)
438 void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
440 /* First entry is core kernel percpu data. */
441 for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
443 pcpu_size[i] = -pcpu_size[i];
450 /* Merge with previous? */
451 if (pcpu_size[i-1] >= 0) {
452 pcpu_size[i-1] += pcpu_size[i];
454 memmove(&pcpu_size[i], &pcpu_size[i+1],
455 (pcpu_num_used - i) * sizeof(pcpu_size[0]));
458 /* Merge with next? */
459 if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
460 pcpu_size[i] += pcpu_size[i+1];
462 memmove(&pcpu_size[i+1], &pcpu_size[i+2],
463 (pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
467 static unsigned int find_pcpusec(Elf_Ehdr *hdr,
469 const char *secstrings)
471 return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
474 static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
478 for_each_possible_cpu(cpu)
479 memcpy(pcpudest + per_cpu_offset(cpu), from, size);
482 static int percpu_modinit(void)
485 pcpu_num_allocated = 2;
486 pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
488 /* Static in-kernel percpu data (used). */
489 pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
491 pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
492 if (pcpu_size[1] < 0) {
493 printk(KERN_ERR "No per-cpu room for modules.\n");
499 __initcall(percpu_modinit);
500 #else /* ... !CONFIG_SMP */
501 static inline void *percpu_modalloc(unsigned long size, unsigned long align,
506 static inline void percpu_modfree(void *pcpuptr)
510 static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
512 const char *secstrings)
516 static inline void percpu_modcopy(void *pcpudst, const void *src,
519 /* pcpusec should be 0, and size of that section should be 0. */
522 #endif /* CONFIG_SMP */
524 #define MODINFO_ATTR(field) \
525 static void setup_modinfo_##field(struct module *mod, const char *s) \
527 mod->field = kstrdup(s, GFP_KERNEL); \
529 static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
530 struct module *mod, char *buffer) \
532 return sprintf(buffer, "%s\n", mod->field); \
534 static int modinfo_##field##_exists(struct module *mod) \
536 return mod->field != NULL; \
538 static void free_modinfo_##field(struct module *mod) \
543 static struct module_attribute modinfo_##field = { \
544 .attr = { .name = __stringify(field), .mode = 0444 }, \
545 .show = show_modinfo_##field, \
546 .setup = setup_modinfo_##field, \
547 .test = modinfo_##field##_exists, \
548 .free = free_modinfo_##field, \
551 MODINFO_ATTR(version);
552 MODINFO_ATTR(srcversion);
554 static char last_unloaded_module[MODULE_NAME_LEN+1];
556 #ifdef CONFIG_MODULE_UNLOAD
557 /* Init the unload section of the module. */
558 static void module_unload_init(struct module *mod)
562 INIT_LIST_HEAD(&mod->modules_which_use_me);
563 for (i = 0; i < NR_CPUS; i++)
564 local_set(&mod->ref[i].count, 0);
565 /* Hold reference count during initialization. */
566 local_set(&mod->ref[raw_smp_processor_id()].count, 1);
567 /* Backwards compatibility macros put refcount during init. */
568 mod->waiter = current;
571 /* modules using other modules */
574 struct list_head list;
575 struct module *module_which_uses;
578 /* Does a already use b? */
579 static int already_uses(struct module *a, struct module *b)
581 struct module_use *use;
583 list_for_each_entry(use, &b->modules_which_use_me, list) {
584 if (use->module_which_uses == a) {
585 DEBUGP("%s uses %s!\n", a->name, b->name);
589 DEBUGP("%s does not use %s!\n", a->name, b->name);
593 /* Module a uses b */
594 static int use_module(struct module *a, struct module *b)
596 struct module_use *use;
599 if (b == NULL || already_uses(a, b)) return 1;
601 /* If we're interrupted or time out, we fail. */
602 if (wait_event_interruptible_timeout(
603 module_wq, (err = strong_try_module_get(b)) != -EBUSY,
605 printk("%s: gave up waiting for init of module %s.\n",
610 /* If strong_try_module_get() returned a different error, we fail. */
614 DEBUGP("Allocating new usage for %s.\n", a->name);
615 use = kmalloc(sizeof(*use), GFP_ATOMIC);
617 printk("%s: out of memory loading\n", a->name);
622 use->module_which_uses = a;
623 list_add(&use->list, &b->modules_which_use_me);
624 no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
628 /* Clear the unload stuff of the module. */
629 static void module_unload_free(struct module *mod)
633 list_for_each_entry(i, &modules, list) {
634 struct module_use *use;
636 list_for_each_entry(use, &i->modules_which_use_me, list) {
637 if (use->module_which_uses == mod) {
638 DEBUGP("%s unusing %s\n", mod->name, i->name);
640 list_del(&use->list);
642 sysfs_remove_link(i->holders_dir, mod->name);
643 /* There can be at most one match. */
650 #ifdef CONFIG_MODULE_FORCE_UNLOAD
651 static inline int try_force_unload(unsigned int flags)
653 int ret = (flags & O_TRUNC);
655 add_taint(TAINT_FORCED_RMMOD);
659 static inline int try_force_unload(unsigned int flags)
663 #endif /* CONFIG_MODULE_FORCE_UNLOAD */
672 /* Whole machine is stopped with interrupts off when this runs. */
673 static int __try_stop_module(void *_sref)
675 struct stopref *sref = _sref;
677 /* If it's not unused, quit unless we're forcing. */
678 if (module_refcount(sref->mod) != 0) {
679 if (!(*sref->forced = try_force_unload(sref->flags)))
683 /* Mark it as dying. */
684 sref->mod->state = MODULE_STATE_GOING;
688 static int try_stop_module(struct module *mod, int flags, int *forced)
690 if (flags & O_NONBLOCK) {
691 struct stopref sref = { mod, flags, forced };
693 return stop_machine_run(__try_stop_module, &sref, NR_CPUS);
695 /* We don't need to stop the machine for this. */
696 mod->state = MODULE_STATE_GOING;
702 unsigned int module_refcount(struct module *mod)
704 unsigned int i, total = 0;
706 for (i = 0; i < NR_CPUS; i++)
707 total += local_read(&mod->ref[i].count);
710 EXPORT_SYMBOL(module_refcount);
712 /* This exists whether we can unload or not */
713 static void free_module(struct module *mod);
715 static void wait_for_zero_refcount(struct module *mod)
717 /* Since we might sleep for some time, release the mutex first */
718 mutex_unlock(&module_mutex);
720 DEBUGP("Looking at refcount...\n");
721 set_current_state(TASK_UNINTERRUPTIBLE);
722 if (module_refcount(mod) == 0)
726 current->state = TASK_RUNNING;
727 mutex_lock(&module_mutex);
731 sys_delete_module(const char __user *name_user, unsigned int flags)
734 char name[MODULE_NAME_LEN];
737 if (!capable(CAP_SYS_MODULE))
740 if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
742 name[MODULE_NAME_LEN-1] = '\0';
744 if (mutex_lock_interruptible(&module_mutex) != 0)
747 mod = find_module(name);
753 if (!list_empty(&mod->modules_which_use_me)) {
754 /* Other modules depend on us: get rid of them first. */
759 /* Doing init or already dying? */
760 if (mod->state != MODULE_STATE_LIVE) {
761 /* FIXME: if (force), slam module count and wake up
763 DEBUGP("%s already dying\n", mod->name);
768 /* If it has an init func, it must have an exit func to unload */
769 if (mod->init && !mod->exit) {
770 forced = try_force_unload(flags);
772 /* This module can't be removed */
778 /* Set this up before setting mod->state */
779 mod->waiter = current;
781 /* Stop the machine so refcounts can't move and disable module. */
782 ret = try_stop_module(mod, flags, &forced);
786 /* Never wait if forced. */
787 if (!forced && module_refcount(mod) != 0)
788 wait_for_zero_refcount(mod);
790 mutex_unlock(&module_mutex);
791 /* Final destruction now noone is using it. */
792 if (mod->exit != NULL)
794 blocking_notifier_call_chain(&module_notify_list,
795 MODULE_STATE_GOING, mod);
796 mutex_lock(&module_mutex);
797 /* Store the name of the last unloaded module for diagnostic purposes */
798 strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
802 mutex_unlock(&module_mutex);
806 static void print_unload_info(struct seq_file *m, struct module *mod)
808 struct module_use *use;
809 int printed_something = 0;
811 seq_printf(m, " %u ", module_refcount(mod));
813 /* Always include a trailing , so userspace can differentiate
814 between this and the old multi-field proc format. */
815 list_for_each_entry(use, &mod->modules_which_use_me, list) {
816 printed_something = 1;
817 seq_printf(m, "%s,", use->module_which_uses->name);
820 if (mod->init != NULL && mod->exit == NULL) {
821 printed_something = 1;
822 seq_printf(m, "[permanent],");
825 if (!printed_something)
829 void __symbol_put(const char *symbol)
831 struct module *owner;
834 if (IS_ERR_VALUE(find_symbol(symbol, &owner, NULL, true, false)))
839 EXPORT_SYMBOL(__symbol_put);
841 void symbol_put_addr(void *addr)
843 struct module *modaddr;
845 if (core_kernel_text((unsigned long)addr))
848 if (!(modaddr = module_text_address((unsigned long)addr)))
852 EXPORT_SYMBOL_GPL(symbol_put_addr);
854 static ssize_t show_refcnt(struct module_attribute *mattr,
855 struct module *mod, char *buffer)
857 return sprintf(buffer, "%u\n", module_refcount(mod));
860 static struct module_attribute refcnt = {
861 .attr = { .name = "refcnt", .mode = 0444 },
865 void module_put(struct module *module)
868 unsigned int cpu = get_cpu();
869 local_dec(&module->ref[cpu].count);
870 /* Maybe they're waiting for us to drop reference? */
871 if (unlikely(!module_is_live(module)))
872 wake_up_process(module->waiter);
876 EXPORT_SYMBOL(module_put);
878 #else /* !CONFIG_MODULE_UNLOAD */
879 static void print_unload_info(struct seq_file *m, struct module *mod)
881 /* We don't know the usage count, or what modules are using. */
882 seq_printf(m, " - -");
885 static inline void module_unload_free(struct module *mod)
889 static inline int use_module(struct module *a, struct module *b)
891 return strong_try_module_get(b) == 0;
894 static inline void module_unload_init(struct module *mod)
897 #endif /* CONFIG_MODULE_UNLOAD */
899 static ssize_t show_initstate(struct module_attribute *mattr,
900 struct module *mod, char *buffer)
902 const char *state = "unknown";
904 switch (mod->state) {
905 case MODULE_STATE_LIVE:
908 case MODULE_STATE_COMING:
911 case MODULE_STATE_GOING:
915 return sprintf(buffer, "%s\n", state);
918 static struct module_attribute initstate = {
919 .attr = { .name = "initstate", .mode = 0444 },
920 .show = show_initstate,
923 static struct module_attribute *modinfo_attrs[] = {
927 #ifdef CONFIG_MODULE_UNLOAD
933 static const char vermagic[] = VERMAGIC_STRING;
935 static int try_to_force_load(struct module *mod, const char *symname)
937 #ifdef CONFIG_MODULE_FORCE_LOAD
938 if (!(tainted & TAINT_FORCED_MODULE))
939 printk("%s: no version for \"%s\" found: kernel tainted.\n",
941 add_taint_module(mod, TAINT_FORCED_MODULE);
948 #ifdef CONFIG_MODVERSIONS
949 static int check_version(Elf_Shdr *sechdrs,
950 unsigned int versindex,
953 const unsigned long *crc)
955 unsigned int i, num_versions;
956 struct modversion_info *versions;
958 /* Exporting module didn't supply crcs? OK, we're already tainted. */
962 /* No versions at all? modprobe --force does this. */
964 return try_to_force_load(mod, symname) == 0;
966 versions = (void *) sechdrs[versindex].sh_addr;
967 num_versions = sechdrs[versindex].sh_size
968 / sizeof(struct modversion_info);
970 for (i = 0; i < num_versions; i++) {
971 if (strcmp(versions[i].name, symname) != 0)
974 if (versions[i].crc == *crc)
976 DEBUGP("Found checksum %lX vs module %lX\n",
977 *crc, versions[i].crc);
981 printk(KERN_WARNING "%s: no symbol version for %s\n",
986 printk("%s: disagrees about version of symbol %s\n",
991 static inline int check_modstruct_version(Elf_Shdr *sechdrs,
992 unsigned int versindex,
995 const unsigned long *crc;
997 if (IS_ERR_VALUE(find_symbol("struct_module", NULL, &crc, true, false)))
999 return check_version(sechdrs, versindex, "struct_module", mod, crc);
1002 /* First part is kernel version, which we ignore if module has crcs. */
1003 static inline int same_magic(const char *amagic, const char *bmagic,
1007 amagic += strcspn(amagic, " ");
1008 bmagic += strcspn(bmagic, " ");
1010 return strcmp(amagic, bmagic) == 0;
1013 static inline int check_version(Elf_Shdr *sechdrs,
1014 unsigned int versindex,
1015 const char *symname,
1017 const unsigned long *crc)
1022 static inline int check_modstruct_version(Elf_Shdr *sechdrs,
1023 unsigned int versindex,
1029 static inline int same_magic(const char *amagic, const char *bmagic,
1032 return strcmp(amagic, bmagic) == 0;
1034 #endif /* CONFIG_MODVERSIONS */
1036 /* Resolve a symbol for this module. I.e. if we find one, record usage.
1037 Must be holding module_mutex. */
1038 static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
1039 unsigned int versindex,
1043 struct module *owner;
1045 const unsigned long *crc;
1047 ret = find_symbol(name, &owner, &crc,
1048 !(mod->taints & TAINT_PROPRIETARY_MODULE), true);
1049 if (!IS_ERR_VALUE(ret)) {
1050 /* use_module can fail due to OOM,
1051 or module initialization or unloading */
1052 if (!check_version(sechdrs, versindex, name, mod, crc) ||
1053 !use_module(mod, owner))
1060 * /sys/module/foo/sections stuff
1061 * J. Corbet <corbet@lwn.net>
1063 #if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
1064 struct module_sect_attr
1066 struct module_attribute mattr;
1068 unsigned long address;
1071 struct module_sect_attrs
1073 struct attribute_group grp;
1074 unsigned int nsections;
1075 struct module_sect_attr attrs[0];
1078 static ssize_t module_sect_show(struct module_attribute *mattr,
1079 struct module *mod, char *buf)
1081 struct module_sect_attr *sattr =
1082 container_of(mattr, struct module_sect_attr, mattr);
1083 return sprintf(buf, "0x%lx\n", sattr->address);
1086 static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
1088 unsigned int section;
1090 for (section = 0; section < sect_attrs->nsections; section++)
1091 kfree(sect_attrs->attrs[section].name);
1095 static void add_sect_attrs(struct module *mod, unsigned int nsect,
1096 char *secstrings, Elf_Shdr *sechdrs)
1098 unsigned int nloaded = 0, i, size[2];
1099 struct module_sect_attrs *sect_attrs;
1100 struct module_sect_attr *sattr;
1101 struct attribute **gattr;
1103 /* Count loaded sections and allocate structures */
1104 for (i = 0; i < nsect; i++)
1105 if (sechdrs[i].sh_flags & SHF_ALLOC)
1107 size[0] = ALIGN(sizeof(*sect_attrs)
1108 + nloaded * sizeof(sect_attrs->attrs[0]),
1109 sizeof(sect_attrs->grp.attrs[0]));
1110 size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
1111 sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL);
1112 if (sect_attrs == NULL)
1115 /* Setup section attributes. */
1116 sect_attrs->grp.name = "sections";
1117 sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
1119 sect_attrs->nsections = 0;
1120 sattr = §_attrs->attrs[0];
1121 gattr = §_attrs->grp.attrs[0];
1122 for (i = 0; i < nsect; i++) {
1123 if (! (sechdrs[i].sh_flags & SHF_ALLOC))
1125 sattr->address = sechdrs[i].sh_addr;
1126 sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
1128 if (sattr->name == NULL)
1130 sect_attrs->nsections++;
1131 sattr->mattr.show = module_sect_show;
1132 sattr->mattr.store = NULL;
1133 sattr->mattr.attr.name = sattr->name;
1134 sattr->mattr.attr.mode = S_IRUGO;
1135 *(gattr++) = &(sattr++)->mattr.attr;
1139 if (sysfs_create_group(&mod->mkobj.kobj, §_attrs->grp))
1142 mod->sect_attrs = sect_attrs;
1145 free_sect_attrs(sect_attrs);
1148 static void remove_sect_attrs(struct module *mod)
1150 if (mod->sect_attrs) {
1151 sysfs_remove_group(&mod->mkobj.kobj,
1152 &mod->sect_attrs->grp);
1153 /* We are positive that no one is using any sect attrs
1154 * at this point. Deallocate immediately. */
1155 free_sect_attrs(mod->sect_attrs);
1156 mod->sect_attrs = NULL;
1161 * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections.
1164 struct module_notes_attrs {
1165 struct kobject *dir;
1167 struct bin_attribute attrs[0];
1170 static ssize_t module_notes_read(struct kobject *kobj,
1171 struct bin_attribute *bin_attr,
1172 char *buf, loff_t pos, size_t count)
1175 * The caller checked the pos and count against our size.
1177 memcpy(buf, bin_attr->private + pos, count);
1181 static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
1184 if (notes_attrs->dir) {
1186 sysfs_remove_bin_file(notes_attrs->dir,
1187 ¬es_attrs->attrs[i]);
1188 kobject_del(notes_attrs->dir);
1193 static void add_notes_attrs(struct module *mod, unsigned int nsect,
1194 char *secstrings, Elf_Shdr *sechdrs)
1196 unsigned int notes, loaded, i;
1197 struct module_notes_attrs *notes_attrs;
1198 struct bin_attribute *nattr;
1200 /* Count notes sections and allocate structures. */
1202 for (i = 0; i < nsect; i++)
1203 if ((sechdrs[i].sh_flags & SHF_ALLOC) &&
1204 (sechdrs[i].sh_type == SHT_NOTE))
1210 notes_attrs = kzalloc(sizeof(*notes_attrs)
1211 + notes * sizeof(notes_attrs->attrs[0]),
1213 if (notes_attrs == NULL)
1216 notes_attrs->notes = notes;
1217 nattr = ¬es_attrs->attrs[0];
1218 for (loaded = i = 0; i < nsect; ++i) {
1219 if (!(sechdrs[i].sh_flags & SHF_ALLOC))
1221 if (sechdrs[i].sh_type == SHT_NOTE) {
1222 nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
1223 nattr->attr.mode = S_IRUGO;
1224 nattr->size = sechdrs[i].sh_size;
1225 nattr->private = (void *) sechdrs[i].sh_addr;
1226 nattr->read = module_notes_read;
1232 notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj);
1233 if (!notes_attrs->dir)
1236 for (i = 0; i < notes; ++i)
1237 if (sysfs_create_bin_file(notes_attrs->dir,
1238 ¬es_attrs->attrs[i]))
1241 mod->notes_attrs = notes_attrs;
1245 free_notes_attrs(notes_attrs, i);
1248 static void remove_notes_attrs(struct module *mod)
1250 if (mod->notes_attrs)
1251 free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes);
1256 static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
1257 char *sectstrings, Elf_Shdr *sechdrs)
1261 static inline void remove_sect_attrs(struct module *mod)
1265 static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
1266 char *sectstrings, Elf_Shdr *sechdrs)
1270 static inline void remove_notes_attrs(struct module *mod)
1276 int module_add_modinfo_attrs(struct module *mod)
1278 struct module_attribute *attr;
1279 struct module_attribute *temp_attr;
1283 mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) *
1284 (ARRAY_SIZE(modinfo_attrs) + 1)),
1286 if (!mod->modinfo_attrs)
1289 temp_attr = mod->modinfo_attrs;
1290 for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) {
1292 (attr->test && attr->test(mod))) {
1293 memcpy(temp_attr, attr, sizeof(*temp_attr));
1294 error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
1301 void module_remove_modinfo_attrs(struct module *mod)
1303 struct module_attribute *attr;
1306 for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) {
1307 /* pick a field to test for end of list */
1308 if (!attr->attr.name)
1310 sysfs_remove_file(&mod->mkobj.kobj,&attr->attr);
1314 kfree(mod->modinfo_attrs);
1317 int mod_sysfs_init(struct module *mod)
1320 struct kobject *kobj;
1322 if (!module_sysfs_initialized) {
1323 printk(KERN_ERR "%s: module sysfs not initialized\n",
1329 kobj = kset_find_obj(module_kset, mod->name);
1331 printk(KERN_ERR "%s: module is already loaded\n", mod->name);
1337 mod->mkobj.mod = mod;
1339 memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
1340 mod->mkobj.kobj.kset = module_kset;
1341 err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL,
1344 kobject_put(&mod->mkobj.kobj);
1346 /* delay uevent until full sysfs population */
1351 int mod_sysfs_setup(struct module *mod,
1352 struct kernel_param *kparam,
1353 unsigned int num_params)
1357 mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj);
1358 if (!mod->holders_dir) {
1363 err = module_param_sysfs_setup(mod, kparam, num_params);
1365 goto out_unreg_holders;
1367 err = module_add_modinfo_attrs(mod);
1369 goto out_unreg_param;
1371 kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
1375 module_param_sysfs_remove(mod);
1377 kobject_put(mod->holders_dir);
1379 kobject_put(&mod->mkobj.kobj);
1383 static void mod_sysfs_fini(struct module *mod)
1385 kobject_put(&mod->mkobj.kobj);
1388 #else /* CONFIG_SYSFS */
1390 static void mod_sysfs_fini(struct module *mod)
1394 #endif /* CONFIG_SYSFS */
1396 static void mod_kobject_remove(struct module *mod)
1398 module_remove_modinfo_attrs(mod);
1399 module_param_sysfs_remove(mod);
1400 kobject_put(mod->mkobj.drivers_dir);
1401 kobject_put(mod->holders_dir);
1402 mod_sysfs_fini(mod);
1406 * link the module with the whole machine is stopped with interrupts off
1407 * - this defends against kallsyms not taking locks
1409 static int __link_module(void *_mod)
1411 struct module *mod = _mod;
1412 list_add(&mod->list, &modules);
1417 * unlink the module with the whole machine is stopped with interrupts off
1418 * - this defends against kallsyms not taking locks
1420 static int __unlink_module(void *_mod)
1422 struct module *mod = _mod;
1423 list_del(&mod->list);
1427 /* Free a module, remove from lists, etc (must hold module_mutex). */
1428 static void free_module(struct module *mod)
1430 /* Delete from various lists */
1431 stop_machine_run(__unlink_module, mod, NR_CPUS);
1432 remove_notes_attrs(mod);
1433 remove_sect_attrs(mod);
1434 mod_kobject_remove(mod);
1436 unwind_remove_table(mod->unwind_info, 0);
1438 /* Arch-specific cleanup. */
1439 module_arch_cleanup(mod);
1441 /* Module unload stuff */
1442 module_unload_free(mod);
1444 /* This may be NULL, but that's OK */
1445 module_free(mod, mod->module_init);
1448 percpu_modfree(mod->percpu);
1450 /* Free lock-classes: */
1451 lockdep_free_key_range(mod->module_core, mod->core_size);
1453 /* Finally, free the core (containing the module structure) */
1454 module_free(mod, mod->module_core);
1457 void *__symbol_get(const char *symbol)
1459 struct module *owner;
1460 unsigned long value;
1463 value = find_symbol(symbol, &owner, NULL, true, true);
1464 if (IS_ERR_VALUE(value))
1466 else if (strong_try_module_get(owner))
1470 return (void *)value;
1472 EXPORT_SYMBOL_GPL(__symbol_get);
1475 * Ensure that an exported symbol [global namespace] does not already exist
1476 * in the kernel or in some other module's exported symbol table.
1478 static int verify_export_symbols(struct module *mod)
1481 struct module *owner;
1482 const struct kernel_symbol *s;
1484 const struct kernel_symbol *sym;
1487 { mod->syms, mod->num_syms },
1488 { mod->gpl_syms, mod->num_gpl_syms },
1489 { mod->gpl_future_syms, mod->num_gpl_future_syms },
1490 #ifdef CONFIG_UNUSED_SYMBOLS
1491 { mod->unused_syms, mod->num_unused_syms },
1492 { mod->unused_gpl_syms, mod->num_unused_gpl_syms },
1496 for (i = 0; i < ARRAY_SIZE(arr); i++) {
1497 for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) {
1498 if (!IS_ERR_VALUE(find_symbol(s->name, &owner,
1499 NULL, true, false))) {
1501 "%s: exports duplicate symbol %s"
1503 mod->name, s->name, module_name(owner));
1511 /* Change all symbols so that st_value encodes the pointer directly. */
1512 static int simplify_symbols(Elf_Shdr *sechdrs,
1513 unsigned int symindex,
1515 unsigned int versindex,
1516 unsigned int pcpuindex,
1519 Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
1520 unsigned long secbase;
1521 unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
1524 for (i = 1; i < n; i++) {
1525 switch (sym[i].st_shndx) {
1527 /* We compiled with -fno-common. These are not
1528 supposed to happen. */
1529 DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
1530 printk("%s: please compile with -fno-common\n",
1536 /* Don't need to do anything */
1537 DEBUGP("Absolute symbol: 0x%08lx\n",
1538 (long)sym[i].st_value);
1543 = resolve_symbol(sechdrs, versindex,
1544 strtab + sym[i].st_name, mod);
1546 /* Ok if resolved. */
1547 if (!IS_ERR_VALUE(sym[i].st_value))
1550 if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
1553 printk(KERN_WARNING "%s: Unknown symbol %s\n",
1554 mod->name, strtab + sym[i].st_name);
1559 /* Divert to percpu allocation if a percpu var. */
1560 if (sym[i].st_shndx == pcpuindex)
1561 secbase = (unsigned long)mod->percpu;
1563 secbase = sechdrs[sym[i].st_shndx].sh_addr;
1564 sym[i].st_value += secbase;
1572 /* Update size with this section: return offset. */
1573 static long get_offset(unsigned int *size, Elf_Shdr *sechdr)
1577 ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
1578 *size = ret + sechdr->sh_size;
1582 /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld
1583 might -- code, read-only data, read-write data, small data. Tally
1584 sizes, and place the offsets into sh_entsize fields: high bit means it
1586 static void layout_sections(struct module *mod,
1587 const Elf_Ehdr *hdr,
1589 const char *secstrings)
1591 static unsigned long const masks[][2] = {
1592 /* NOTE: all executable code must be the first section
1593 * in this array; otherwise modify the text_size
1594 * finder in the two loops below */
1595 { SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL },
1596 { SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL },
1597 { SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL },
1598 { ARCH_SHF_SMALL | SHF_ALLOC, 0 }
1602 for (i = 0; i < hdr->e_shnum; i++)
1603 sechdrs[i].sh_entsize = ~0UL;
1605 DEBUGP("Core section allocation order:\n");
1606 for (m = 0; m < ARRAY_SIZE(masks); ++m) {
1607 for (i = 0; i < hdr->e_shnum; ++i) {
1608 Elf_Shdr *s = &sechdrs[i];
1610 if ((s->sh_flags & masks[m][0]) != masks[m][0]
1611 || (s->sh_flags & masks[m][1])
1612 || s->sh_entsize != ~0UL
1613 || strncmp(secstrings + s->sh_name,
1616 s->sh_entsize = get_offset(&mod->core_size, s);
1617 DEBUGP("\t%s\n", secstrings + s->sh_name);
1620 mod->core_text_size = mod->core_size;
1623 DEBUGP("Init section allocation order:\n");
1624 for (m = 0; m < ARRAY_SIZE(masks); ++m) {
1625 for (i = 0; i < hdr->e_shnum; ++i) {
1626 Elf_Shdr *s = &sechdrs[i];
1628 if ((s->sh_flags & masks[m][0]) != masks[m][0]
1629 || (s->sh_flags & masks[m][1])
1630 || s->sh_entsize != ~0UL
1631 || strncmp(secstrings + s->sh_name,
1634 s->sh_entsize = (get_offset(&mod->init_size, s)
1635 | INIT_OFFSET_MASK);
1636 DEBUGP("\t%s\n", secstrings + s->sh_name);
1639 mod->init_text_size = mod->init_size;
1643 static void set_license(struct module *mod, const char *license)
1646 license = "unspecified";
1648 if (!license_is_gpl_compatible(license)) {
1649 if (!(tainted & TAINT_PROPRIETARY_MODULE))
1650 printk(KERN_WARNING "%s: module license '%s' taints "
1651 "kernel.\n", mod->name, license);
1652 add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
1656 /* Parse tag=value strings from .modinfo section */
1657 static char *next_string(char *string, unsigned long *secsize)
1659 /* Skip non-zero chars */
1662 if ((*secsize)-- <= 1)
1666 /* Skip any zero padding. */
1667 while (!string[0]) {
1669 if ((*secsize)-- <= 1)
1675 static char *get_modinfo(Elf_Shdr *sechdrs,
1680 unsigned int taglen = strlen(tag);
1681 unsigned long size = sechdrs[info].sh_size;
1683 for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) {
1684 if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
1685 return p + taglen + 1;
1690 static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
1691 unsigned int infoindex)
1693 struct module_attribute *attr;
1696 for (i = 0; (attr = modinfo_attrs[i]); i++) {
1699 get_modinfo(sechdrs,
1705 #ifdef CONFIG_KALLSYMS
1706 static int is_exported(const char *name, const struct module *mod)
1708 if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
1711 if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
1718 static char elf_type(const Elf_Sym *sym,
1720 const char *secstrings,
1723 if (ELF_ST_BIND(sym->st_info) == STB_WEAK) {
1724 if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT)
1729 if (sym->st_shndx == SHN_UNDEF)
1731 if (sym->st_shndx == SHN_ABS)
1733 if (sym->st_shndx >= SHN_LORESERVE)
1735 if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR)
1737 if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC
1738 && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) {
1739 if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE))
1741 else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
1746 if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) {
1747 if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
1752 if (strncmp(secstrings + sechdrs[sym->st_shndx].sh_name,
1753 ".debug", strlen(".debug")) == 0)
1758 static void add_kallsyms(struct module *mod,
1760 unsigned int symindex,
1761 unsigned int strindex,
1762 const char *secstrings)
1766 mod->symtab = (void *)sechdrs[symindex].sh_addr;
1767 mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
1768 mod->strtab = (void *)sechdrs[strindex].sh_addr;
1770 /* Set types up while we still have access to sections. */
1771 for (i = 0; i < mod->num_symtab; i++)
1772 mod->symtab[i].st_info
1773 = elf_type(&mod->symtab[i], sechdrs, secstrings, mod);
1776 static inline void add_kallsyms(struct module *mod,
1778 unsigned int symindex,
1779 unsigned int strindex,
1780 const char *secstrings)
1783 #endif /* CONFIG_KALLSYMS */
1785 static void *module_alloc_update_bounds(unsigned long size)
1787 void *ret = module_alloc(size);
1790 /* Update module bounds. */
1791 if ((unsigned long)ret < module_addr_min)
1792 module_addr_min = (unsigned long)ret;
1793 if ((unsigned long)ret + size > module_addr_max)
1794 module_addr_max = (unsigned long)ret + size;
1799 /* Allocate and load the module: note that size of section 0 is always
1800 zero, and we rely on this for optional sections. */
1801 static struct module *load_module(void __user *umod,
1803 const char __user *uargs)
1807 char *secstrings, *args, *modmagic, *strtab = NULL;
1809 unsigned int symindex = 0;
1810 unsigned int strindex = 0;
1811 unsigned int setupindex;
1812 unsigned int exindex;
1813 unsigned int exportindex;
1814 unsigned int modindex;
1815 unsigned int obsparmindex;
1816 unsigned int infoindex;
1817 unsigned int gplindex;
1818 unsigned int crcindex;
1819 unsigned int gplcrcindex;
1820 unsigned int versindex;
1821 unsigned int pcpuindex;
1822 unsigned int gplfutureindex;
1823 unsigned int gplfuturecrcindex;
1824 unsigned int unwindex = 0;
1825 #ifdef CONFIG_UNUSED_SYMBOLS
1826 unsigned int unusedindex;
1827 unsigned int unusedcrcindex;
1828 unsigned int unusedgplindex;
1829 unsigned int unusedgplcrcindex;
1831 unsigned int markersindex;
1832 unsigned int markersstringsindex;
1835 void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
1836 struct exception_table_entry *extable;
1837 mm_segment_t old_fs;
1839 DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
1841 if (len < sizeof(*hdr))
1842 return ERR_PTR(-ENOEXEC);
1844 /* Suck in entire file: we'll want most of it. */
1845 /* vmalloc barfs on "unusual" numbers. Check here */
1846 if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
1847 return ERR_PTR(-ENOMEM);
1848 if (copy_from_user(hdr, umod, len) != 0) {
1853 /* Sanity checks against insmoding binaries or wrong arch,
1854 weird elf version */
1855 if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0
1856 || hdr->e_type != ET_REL
1857 || !elf_check_arch(hdr)
1858 || hdr->e_shentsize != sizeof(*sechdrs)) {
1863 if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr))
1866 /* Convenience variables */
1867 sechdrs = (void *)hdr + hdr->e_shoff;
1868 secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
1869 sechdrs[0].sh_addr = 0;
1871 for (i = 1; i < hdr->e_shnum; i++) {
1872 if (sechdrs[i].sh_type != SHT_NOBITS
1873 && len < sechdrs[i].sh_offset + sechdrs[i].sh_size)
1876 /* Mark all sections sh_addr with their address in the
1878 sechdrs[i].sh_addr = (size_t)hdr + sechdrs[i].sh_offset;
1880 /* Internal symbols and strings. */
1881 if (sechdrs[i].sh_type == SHT_SYMTAB) {
1883 strindex = sechdrs[i].sh_link;
1884 strtab = (char *)hdr + sechdrs[strindex].sh_offset;
1886 #ifndef CONFIG_MODULE_UNLOAD
1887 /* Don't load .exit sections */
1888 if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
1889 sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
1893 modindex = find_sec(hdr, sechdrs, secstrings,
1894 ".gnu.linkonce.this_module");
1896 printk(KERN_WARNING "No module found in object\n");
1900 mod = (void *)sechdrs[modindex].sh_addr;
1902 if (symindex == 0) {
1903 printk(KERN_WARNING "%s: module has no symbols (stripped?)\n",
1909 /* Optional sections */
1910 exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab");
1911 gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl");
1912 gplfutureindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl_future");
1913 crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab");
1914 gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl");
1915 gplfuturecrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl_future");
1916 #ifdef CONFIG_UNUSED_SYMBOLS
1917 unusedindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused");
1918 unusedgplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused_gpl");
1919 unusedcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused");
1920 unusedgplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused_gpl");
1922 setupindex = find_sec(hdr, sechdrs, secstrings, "__param");
1923 exindex = find_sec(hdr, sechdrs, secstrings, "__ex_table");
1924 obsparmindex = find_sec(hdr, sechdrs, secstrings, "__obsparm");
1925 versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
1926 infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
1927 pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
1928 #ifdef ARCH_UNWIND_SECTION_NAME
1929 unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
1932 /* Don't keep modinfo and version sections. */
1933 sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
1934 sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
1935 #ifdef CONFIG_KALLSYMS
1936 /* Keep symbol and string tables for decoding later. */
1937 sechdrs[symindex].sh_flags |= SHF_ALLOC;
1938 sechdrs[strindex].sh_flags |= SHF_ALLOC;
1941 sechdrs[unwindex].sh_flags |= SHF_ALLOC;
1943 /* Check module struct version now, before we try to use module. */
1944 if (!check_modstruct_version(sechdrs, versindex, mod)) {
1949 modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
1950 /* This is allowed: modprobe --force will invalidate it. */
1952 err = try_to_force_load(mod, "magic");
1955 } else if (!same_magic(modmagic, vermagic, versindex)) {
1956 printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
1957 mod->name, modmagic, vermagic);
1962 /* Now copy in args */
1963 args = strndup_user(uargs, ~0UL >> 1);
1965 err = PTR_ERR(args);
1969 if (find_module(mod->name)) {
1974 mod->state = MODULE_STATE_COMING;
1976 /* Allow arches to frob section contents and sizes. */
1977 err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod);
1982 /* We have a special allocation for this section. */
1983 percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size,
1984 sechdrs[pcpuindex].sh_addralign,
1990 sechdrs[pcpuindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
1991 mod->percpu = percpu;
1994 /* Determine total sizes, and put offsets in sh_entsize. For now
1995 this is done generically; there doesn't appear to be any
1996 special cases for the architectures. */
1997 layout_sections(mod, hdr, sechdrs, secstrings);
1999 /* Do the allocs. */
2000 ptr = module_alloc_update_bounds(mod->core_size);
2005 memset(ptr, 0, mod->core_size);
2006 mod->module_core = ptr;
2008 ptr = module_alloc_update_bounds(mod->init_size);
2009 if (!ptr && mod->init_size) {
2013 memset(ptr, 0, mod->init_size);
2014 mod->module_init = ptr;
2016 /* Transfer each section which specifies SHF_ALLOC */
2017 DEBUGP("final section addresses:\n");
2018 for (i = 0; i < hdr->e_shnum; i++) {
2021 if (!(sechdrs[i].sh_flags & SHF_ALLOC))
2024 if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK)
2025 dest = mod->module_init
2026 + (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK);
2028 dest = mod->module_core + sechdrs[i].sh_entsize;
2030 if (sechdrs[i].sh_type != SHT_NOBITS)
2031 memcpy(dest, (void *)sechdrs[i].sh_addr,
2032 sechdrs[i].sh_size);
2033 /* Update sh_addr to point to copy in image. */
2034 sechdrs[i].sh_addr = (unsigned long)dest;
2035 DEBUGP("\t0x%lx %s\n", sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name);
2037 /* Module has been moved. */
2038 mod = (void *)sechdrs[modindex].sh_addr;
2040 /* Now we've moved module, initialize linked lists, etc. */
2041 module_unload_init(mod);
2043 /* add kobject, so we can reference it. */
2044 err = mod_sysfs_init(mod);
2048 /* Set up license info based on the info section */
2049 set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
2052 * ndiswrapper is under GPL by itself, but loads proprietary modules.
2053 * Don't use add_taint_module(), as it would prevent ndiswrapper from
2054 * using GPL-only symbols it needs.
2056 if (strcmp(mod->name, "ndiswrapper") == 0)
2057 add_taint(TAINT_PROPRIETARY_MODULE);
2059 /* driverloader was caught wrongly pretending to be under GPL */
2060 if (strcmp(mod->name, "driverloader") == 0)
2061 add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
2063 /* Set up MODINFO_ATTR fields */
2064 setup_modinfo(mod, sechdrs, infoindex);
2066 /* Fix up syms, so that st_value is a pointer to location. */
2067 err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex,
2072 /* Set up EXPORTed & EXPORT_GPLed symbols (section 0 is 0 length) */
2073 mod->num_syms = sechdrs[exportindex].sh_size / sizeof(*mod->syms);
2074 mod->syms = (void *)sechdrs[exportindex].sh_addr;
2076 mod->crcs = (void *)sechdrs[crcindex].sh_addr;
2077 mod->num_gpl_syms = sechdrs[gplindex].sh_size / sizeof(*mod->gpl_syms);
2078 mod->gpl_syms = (void *)sechdrs[gplindex].sh_addr;
2080 mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr;
2081 mod->num_gpl_future_syms = sechdrs[gplfutureindex].sh_size /
2082 sizeof(*mod->gpl_future_syms);
2083 mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr;
2084 if (gplfuturecrcindex)
2085 mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr;
2087 #ifdef CONFIG_UNUSED_SYMBOLS
2088 mod->num_unused_syms = sechdrs[unusedindex].sh_size /
2089 sizeof(*mod->unused_syms);
2090 mod->num_unused_gpl_syms = sechdrs[unusedgplindex].sh_size /
2091 sizeof(*mod->unused_gpl_syms);
2092 mod->unused_syms = (void *)sechdrs[unusedindex].sh_addr;
2094 mod->unused_crcs = (void *)sechdrs[unusedcrcindex].sh_addr;
2095 mod->unused_gpl_syms = (void *)sechdrs[unusedgplindex].sh_addr;
2096 if (unusedgplcrcindex)
2097 mod->unused_gpl_crcs
2098 = (void *)sechdrs[unusedgplcrcindex].sh_addr;
2101 #ifdef CONFIG_MODVERSIONS
2102 if ((mod->num_syms && !crcindex)
2103 || (mod->num_gpl_syms && !gplcrcindex)
2104 || (mod->num_gpl_future_syms && !gplfuturecrcindex)
2105 #ifdef CONFIG_UNUSED_SYMBOLS
2106 || (mod->num_unused_syms && !unusedcrcindex)
2107 || (mod->num_unused_gpl_syms && !unusedgplcrcindex)
2110 printk(KERN_WARNING "%s: No versions for exported symbols.\n", mod->name);
2111 err = try_to_force_load(mod, "nocrc");
2116 markersindex = find_sec(hdr, sechdrs, secstrings, "__markers");
2117 markersstringsindex = find_sec(hdr, sechdrs, secstrings,
2118 "__markers_strings");
2120 /* Now do relocations. */
2121 for (i = 1; i < hdr->e_shnum; i++) {
2122 const char *strtab = (char *)sechdrs[strindex].sh_addr;
2123 unsigned int info = sechdrs[i].sh_info;
2125 /* Not a valid relocation section? */
2126 if (info >= hdr->e_shnum)
2129 /* Don't bother with non-allocated sections */
2130 if (!(sechdrs[info].sh_flags & SHF_ALLOC))
2133 if (sechdrs[i].sh_type == SHT_REL)
2134 err = apply_relocate(sechdrs, strtab, symindex, i,mod);
2135 else if (sechdrs[i].sh_type == SHT_RELA)
2136 err = apply_relocate_add(sechdrs, strtab, symindex, i,
2141 #ifdef CONFIG_MARKERS
2142 mod->markers = (void *)sechdrs[markersindex].sh_addr;
2144 sechdrs[markersindex].sh_size / sizeof(*mod->markers);
2147 /* Find duplicate symbols */
2148 err = verify_export_symbols(mod);
2153 /* Set up and sort exception table */
2154 mod->num_exentries = sechdrs[exindex].sh_size / sizeof(*mod->extable);
2155 mod->extable = extable = (void *)sechdrs[exindex].sh_addr;
2156 sort_extable(extable, extable + mod->num_exentries);
2158 /* Finally, copy percpu area over. */
2159 percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
2160 sechdrs[pcpuindex].sh_size);
2162 add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
2164 #ifdef CONFIG_MARKERS
2166 marker_update_probe_range(mod->markers,
2167 mod->markers + mod->num_markers);
2169 err = module_finalize(hdr, sechdrs, mod);
2173 /* flush the icache in correct context */
2178 * Flush the instruction cache, since we've played with text.
2179 * Do it before processing of module parameters, so the module
2180 * can provide parameter accessor functions of its own.
2182 if (mod->module_init)
2183 flush_icache_range((unsigned long)mod->module_init,
2184 (unsigned long)mod->module_init
2186 flush_icache_range((unsigned long)mod->module_core,
2187 (unsigned long)mod->module_core + mod->core_size);
2193 printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
2196 /* Now sew it into the lists so we can get lockdep and oops
2197 * info during argument parsing. Noone should access us, since
2198 * strong_try_module_get() will fail. */
2199 stop_machine_run(__link_module, mod, NR_CPUS);
2201 /* Size of section 0 is 0, so this works well if no params */
2202 err = parse_args(mod->name, mod->args,
2203 (struct kernel_param *)
2204 sechdrs[setupindex].sh_addr,
2205 sechdrs[setupindex].sh_size
2206 / sizeof(struct kernel_param),
2211 err = mod_sysfs_setup(mod,
2212 (struct kernel_param *)
2213 sechdrs[setupindex].sh_addr,
2214 sechdrs[setupindex].sh_size
2215 / sizeof(struct kernel_param));
2218 add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
2219 add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
2221 /* Size of section 0 is 0, so this works well if no unwind info. */
2222 mod->unwind_info = unwind_add_table(mod,
2223 (void *)sechdrs[unwindex].sh_addr,
2224 sechdrs[unwindex].sh_size);
2226 /* Get rid of temporary copy */
2233 stop_machine_run(__unlink_module, mod, NR_CPUS);
2234 module_arch_cleanup(mod);
2236 kobject_del(&mod->mkobj.kobj);
2237 kobject_put(&mod->mkobj.kobj);
2239 module_unload_free(mod);
2240 module_free(mod, mod->module_init);
2242 module_free(mod, mod->module_core);
2245 percpu_modfree(percpu);
2250 return ERR_PTR(err);
2253 printk(KERN_ERR "Module len %lu truncated\n", len);
2258 /* This is where the real work happens */
2260 sys_init_module(void __user *umod,
2262 const char __user *uargs)
2267 /* Must have permission */
2268 if (!capable(CAP_SYS_MODULE))
2271 /* Only one module load at a time, please */
2272 if (mutex_lock_interruptible(&module_mutex) != 0)
2275 /* Do all the hard work */
2276 mod = load_module(umod, len, uargs);
2278 mutex_unlock(&module_mutex);
2279 return PTR_ERR(mod);
2282 /* Drop lock so they can recurse */
2283 mutex_unlock(&module_mutex);
2285 blocking_notifier_call_chain(&module_notify_list,
2286 MODULE_STATE_COMING, mod);
2288 /* Start the module */
2289 if (mod->init != NULL)
2292 /* Init routine failed: abort. Try to protect us from
2293 buggy refcounters. */
2294 mod->state = MODULE_STATE_GOING;
2295 synchronize_sched();
2297 blocking_notifier_call_chain(&module_notify_list,
2298 MODULE_STATE_GOING, mod);
2299 mutex_lock(&module_mutex);
2301 mutex_unlock(&module_mutex);
2302 wake_up(&module_wq);
2306 printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, "
2307 "it should follow 0/-E convention\n"
2308 KERN_WARNING "%s: loading module anyway...\n",
2309 __func__, mod->name, ret,
2314 /* Now it's a first class citizen! Wake up anyone waiting for it. */
2315 mod->state = MODULE_STATE_LIVE;
2316 wake_up(&module_wq);
2318 mutex_lock(&module_mutex);
2319 /* Drop initial reference. */
2321 unwind_remove_table(mod->unwind_info, 1);
2322 module_free(mod, mod->module_init);
2323 mod->module_init = NULL;
2325 mod->init_text_size = 0;
2326 mutex_unlock(&module_mutex);
2331 static inline int within(unsigned long addr, void *start, unsigned long size)
2333 return ((void *)addr >= start && (void *)addr < start + size);
2336 #ifdef CONFIG_KALLSYMS
2338 * This ignores the intensely annoying "mapping symbols" found
2339 * in ARM ELF files: $a, $t and $d.
2341 static inline int is_arm_mapping_symbol(const char *str)
2343 return str[0] == '$' && strchr("atd", str[1])
2344 && (str[2] == '\0' || str[2] == '.');
2347 static const char *get_ksymbol(struct module *mod,
2349 unsigned long *size,
2350 unsigned long *offset)
2352 unsigned int i, best = 0;
2353 unsigned long nextval;
2355 /* At worse, next value is at end of module */
2356 if (within(addr, mod->module_init, mod->init_size))
2357 nextval = (unsigned long)mod->module_init+mod->init_text_size;
2359 nextval = (unsigned long)mod->module_core+mod->core_text_size;
2361 /* Scan for closest preceeding symbol, and next symbol. (ELF
2362 starts real symbols at 1). */
2363 for (i = 1; i < mod->num_symtab; i++) {
2364 if (mod->symtab[i].st_shndx == SHN_UNDEF)
2367 /* We ignore unnamed symbols: they're uninformative
2368 * and inserted at a whim. */
2369 if (mod->symtab[i].st_value <= addr
2370 && mod->symtab[i].st_value > mod->symtab[best].st_value
2371 && *(mod->strtab + mod->symtab[i].st_name) != '\0'
2372 && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
2374 if (mod->symtab[i].st_value > addr
2375 && mod->symtab[i].st_value < nextval
2376 && *(mod->strtab + mod->symtab[i].st_name) != '\0'
2377 && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
2378 nextval = mod->symtab[i].st_value;
2385 *size = nextval - mod->symtab[best].st_value;
2387 *offset = addr - mod->symtab[best].st_value;
2388 return mod->strtab + mod->symtab[best].st_name;
2391 /* For kallsyms to ask for address resolution. NULL means not found. Careful
2392 * not to lock to avoid deadlock on oopses, simply disable preemption. */
2393 const char *module_address_lookup(unsigned long addr,
2394 unsigned long *size,
2395 unsigned long *offset,
2400 const char *ret = NULL;
2403 list_for_each_entry(mod, &modules, list) {
2404 if (within(addr, mod->module_init, mod->init_size)
2405 || within(addr, mod->module_core, mod->core_size)) {
2407 *modname = mod->name;
2408 ret = get_ksymbol(mod, addr, size, offset);
2412 /* Make a copy in here where it's safe */
2414 strncpy(namebuf, ret, KSYM_NAME_LEN - 1);
2421 int lookup_module_symbol_name(unsigned long addr, char *symname)
2426 list_for_each_entry(mod, &modules, list) {
2427 if (within(addr, mod->module_init, mod->init_size) ||
2428 within(addr, mod->module_core, mod->core_size)) {
2431 sym = get_ksymbol(mod, addr, NULL, NULL);
2434 strlcpy(symname, sym, KSYM_NAME_LEN);
2444 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
2445 unsigned long *offset, char *modname, char *name)
2450 list_for_each_entry(mod, &modules, list) {
2451 if (within(addr, mod->module_init, mod->init_size) ||
2452 within(addr, mod->module_core, mod->core_size)) {
2455 sym = get_ksymbol(mod, addr, size, offset);
2459 strlcpy(modname, mod->name, MODULE_NAME_LEN);
2461 strlcpy(name, sym, KSYM_NAME_LEN);
2471 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
2472 char *name, char *module_name, int *exported)
2477 list_for_each_entry(mod, &modules, list) {
2478 if (symnum < mod->num_symtab) {
2479 *value = mod->symtab[symnum].st_value;
2480 *type = mod->symtab[symnum].st_info;
2481 strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
2483 strlcpy(module_name, mod->name, MODULE_NAME_LEN);
2484 *exported = is_exported(name, mod);
2488 symnum -= mod->num_symtab;
2494 static unsigned long mod_find_symname(struct module *mod, const char *name)
2498 for (i = 0; i < mod->num_symtab; i++)
2499 if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 &&
2500 mod->symtab[i].st_info != 'U')
2501 return mod->symtab[i].st_value;
2505 /* Look for this name: can be of form module:name. */
2506 unsigned long module_kallsyms_lookup_name(const char *name)
2510 unsigned long ret = 0;
2512 /* Don't lock: we're in enough trouble already. */
2514 if ((colon = strchr(name, ':')) != NULL) {
2516 if ((mod = find_module(name)) != NULL)
2517 ret = mod_find_symname(mod, colon+1);
2520 list_for_each_entry(mod, &modules, list)
2521 if ((ret = mod_find_symname(mod, name)) != 0)
2527 #endif /* CONFIG_KALLSYMS */
2529 /* Called by the /proc file system to return a list of modules. */
2530 static void *m_start(struct seq_file *m, loff_t *pos)
2532 mutex_lock(&module_mutex);
2533 return seq_list_start(&modules, *pos);
2536 static void *m_next(struct seq_file *m, void *p, loff_t *pos)
2538 return seq_list_next(p, &modules, pos);
2541 static void m_stop(struct seq_file *m, void *p)
2543 mutex_unlock(&module_mutex);
2546 static char *module_flags(struct module *mod, char *buf)
2551 mod->state == MODULE_STATE_GOING ||
2552 mod->state == MODULE_STATE_COMING) {
2554 if (mod->taints & TAINT_PROPRIETARY_MODULE)
2556 if (mod->taints & TAINT_FORCED_MODULE)
2559 * TAINT_FORCED_RMMOD: could be added.
2560 * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
2564 /* Show a - for module-is-being-unloaded */
2565 if (mod->state == MODULE_STATE_GOING)
2567 /* Show a + for module-is-being-loaded */
2568 if (mod->state == MODULE_STATE_COMING)
2577 static int m_show(struct seq_file *m, void *p)
2579 struct module *mod = list_entry(p, struct module, list);
2582 seq_printf(m, "%s %u",
2583 mod->name, mod->init_size + mod->core_size);
2584 print_unload_info(m, mod);
2586 /* Informative for users. */
2587 seq_printf(m, " %s",
2588 mod->state == MODULE_STATE_GOING ? "Unloading":
2589 mod->state == MODULE_STATE_COMING ? "Loading":
2591 /* Used by oprofile and other similar tools. */
2592 seq_printf(m, " 0x%p", mod->module_core);
2596 seq_printf(m, " %s", module_flags(mod, buf));
2598 seq_printf(m, "\n");
2602 /* Format: modulename size refcount deps address
2604 Where refcount is a number or -, and deps is a comma-separated list
2607 const struct seq_operations modules_op = {
2614 /* Given an address, look for it in the module exception tables. */
2615 const struct exception_table_entry *search_module_extables(unsigned long addr)
2617 const struct exception_table_entry *e = NULL;
2621 list_for_each_entry(mod, &modules, list) {
2622 if (mod->num_exentries == 0)
2625 e = search_extable(mod->extable,
2626 mod->extable + mod->num_exentries - 1,
2633 /* Now, if we found one, we are running inside it now, hence
2634 we cannot unload the module, hence no refcnt needed. */
2639 * Is this a valid module address?
2641 int is_module_address(unsigned long addr)
2647 list_for_each_entry(mod, &modules, list) {
2648 if (within(addr, mod->module_core, mod->core_size)) {
2660 /* Is this a valid kernel address? */
2661 struct module *__module_text_address(unsigned long addr)
2665 if (addr < module_addr_min || addr > module_addr_max)
2668 list_for_each_entry(mod, &modules, list)
2669 if (within(addr, mod->module_init, mod->init_text_size)
2670 || within(addr, mod->module_core, mod->core_text_size))
2675 struct module *module_text_address(unsigned long addr)
2680 mod = __module_text_address(addr);
2686 /* Don't grab lock, we're oopsing. */
2687 void print_modules(void)
2692 printk("Modules linked in:");
2693 list_for_each_entry(mod, &modules, list)
2694 printk(" %s%s", mod->name, module_flags(mod, buf));
2695 if (last_unloaded_module[0])
2696 printk(" [last unloaded: %s]", last_unloaded_module);
2700 #ifdef CONFIG_MODVERSIONS
2701 /* Generate the signature for struct module here, too, for modversions. */
2702 void struct_module(struct module *mod) { return; }
2703 EXPORT_SYMBOL(struct_module);
2706 #ifdef CONFIG_MARKERS
2707 void module_update_markers(void)
2711 mutex_lock(&module_mutex);
2712 list_for_each_entry(mod, &modules, list)
2714 marker_update_probe_range(mod->markers,
2715 mod->markers + mod->num_markers);
2716 mutex_unlock(&module_mutex);