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 /* Search for module by name: must hold module_mutex. */
329 static struct module *find_module(const char *name)
333 list_for_each_entry(mod, &modules, list) {
334 if (strcmp(mod->name, name) == 0)
341 /* Number of blocks used and allocated. */
342 static unsigned int pcpu_num_used, pcpu_num_allocated;
343 /* Size of each block. -ve means used. */
344 static int *pcpu_size;
346 static int split_block(unsigned int i, unsigned short size)
348 /* Reallocation required? */
349 if (pcpu_num_used + 1 > pcpu_num_allocated) {
352 new = krealloc(pcpu_size, sizeof(new[0])*pcpu_num_allocated*2,
357 pcpu_num_allocated *= 2;
361 /* Insert a new subblock */
362 memmove(&pcpu_size[i+1], &pcpu_size[i],
363 sizeof(pcpu_size[0]) * (pcpu_num_used - i));
366 pcpu_size[i+1] -= size;
371 static inline unsigned int block_size(int val)
378 static void *percpu_modalloc(unsigned long size, unsigned long align,
385 if (align > PAGE_SIZE) {
386 printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
387 name, align, PAGE_SIZE);
391 ptr = __per_cpu_start;
392 for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
393 /* Extra for alignment requirement. */
394 extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
395 BUG_ON(i == 0 && extra != 0);
397 if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
400 /* Transfer extra to previous block. */
401 if (pcpu_size[i-1] < 0)
402 pcpu_size[i-1] -= extra;
404 pcpu_size[i-1] += extra;
405 pcpu_size[i] -= extra;
408 /* Split block if warranted */
409 if (pcpu_size[i] - size > sizeof(unsigned long))
410 if (!split_block(i, size))
414 pcpu_size[i] = -pcpu_size[i];
418 printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
423 static void percpu_modfree(void *freeme)
426 void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
428 /* First entry is core kernel percpu data. */
429 for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
431 pcpu_size[i] = -pcpu_size[i];
438 /* Merge with previous? */
439 if (pcpu_size[i-1] >= 0) {
440 pcpu_size[i-1] += pcpu_size[i];
442 memmove(&pcpu_size[i], &pcpu_size[i+1],
443 (pcpu_num_used - i) * sizeof(pcpu_size[0]));
446 /* Merge with next? */
447 if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
448 pcpu_size[i] += pcpu_size[i+1];
450 memmove(&pcpu_size[i+1], &pcpu_size[i+2],
451 (pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
455 static unsigned int find_pcpusec(Elf_Ehdr *hdr,
457 const char *secstrings)
459 return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
462 static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
466 for_each_possible_cpu(cpu)
467 memcpy(pcpudest + per_cpu_offset(cpu), from, size);
470 static int percpu_modinit(void)
473 pcpu_num_allocated = 2;
474 pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
476 /* Static in-kernel percpu data (used). */
477 pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
479 pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
480 if (pcpu_size[1] < 0) {
481 printk(KERN_ERR "No per-cpu room for modules.\n");
487 __initcall(percpu_modinit);
488 #else /* ... !CONFIG_SMP */
489 static inline void *percpu_modalloc(unsigned long size, unsigned long align,
494 static inline void percpu_modfree(void *pcpuptr)
498 static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
500 const char *secstrings)
504 static inline void percpu_modcopy(void *pcpudst, const void *src,
507 /* pcpusec should be 0, and size of that section should be 0. */
510 #endif /* CONFIG_SMP */
512 #define MODINFO_ATTR(field) \
513 static void setup_modinfo_##field(struct module *mod, const char *s) \
515 mod->field = kstrdup(s, GFP_KERNEL); \
517 static ssize_t show_modinfo_##field(struct module_attribute *mattr, \
518 struct module *mod, char *buffer) \
520 return sprintf(buffer, "%s\n", mod->field); \
522 static int modinfo_##field##_exists(struct module *mod) \
524 return mod->field != NULL; \
526 static void free_modinfo_##field(struct module *mod) \
531 static struct module_attribute modinfo_##field = { \
532 .attr = { .name = __stringify(field), .mode = 0444 }, \
533 .show = show_modinfo_##field, \
534 .setup = setup_modinfo_##field, \
535 .test = modinfo_##field##_exists, \
536 .free = free_modinfo_##field, \
539 MODINFO_ATTR(version);
540 MODINFO_ATTR(srcversion);
542 static char last_unloaded_module[MODULE_NAME_LEN+1];
544 #ifdef CONFIG_MODULE_UNLOAD
545 /* Init the unload section of the module. */
546 static void module_unload_init(struct module *mod)
550 INIT_LIST_HEAD(&mod->modules_which_use_me);
551 for (i = 0; i < NR_CPUS; i++)
552 local_set(&mod->ref[i].count, 0);
553 /* Hold reference count during initialization. */
554 local_set(&mod->ref[raw_smp_processor_id()].count, 1);
555 /* Backwards compatibility macros put refcount during init. */
556 mod->waiter = current;
559 /* modules using other modules */
562 struct list_head list;
563 struct module *module_which_uses;
566 /* Does a already use b? */
567 static int already_uses(struct module *a, struct module *b)
569 struct module_use *use;
571 list_for_each_entry(use, &b->modules_which_use_me, list) {
572 if (use->module_which_uses == a) {
573 DEBUGP("%s uses %s!\n", a->name, b->name);
577 DEBUGP("%s does not use %s!\n", a->name, b->name);
581 /* Module a uses b */
582 static int use_module(struct module *a, struct module *b)
584 struct module_use *use;
587 if (b == NULL || already_uses(a, b)) return 1;
589 /* If we're interrupted or time out, we fail. */
590 if (wait_event_interruptible_timeout(
591 module_wq, (err = strong_try_module_get(b)) != -EBUSY,
593 printk("%s: gave up waiting for init of module %s.\n",
598 /* If strong_try_module_get() returned a different error, we fail. */
602 DEBUGP("Allocating new usage for %s.\n", a->name);
603 use = kmalloc(sizeof(*use), GFP_ATOMIC);
605 printk("%s: out of memory loading\n", a->name);
610 use->module_which_uses = a;
611 list_add(&use->list, &b->modules_which_use_me);
612 no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
616 /* Clear the unload stuff of the module. */
617 static void module_unload_free(struct module *mod)
621 list_for_each_entry(i, &modules, list) {
622 struct module_use *use;
624 list_for_each_entry(use, &i->modules_which_use_me, list) {
625 if (use->module_which_uses == mod) {
626 DEBUGP("%s unusing %s\n", mod->name, i->name);
628 list_del(&use->list);
630 sysfs_remove_link(i->holders_dir, mod->name);
631 /* There can be at most one match. */
638 #ifdef CONFIG_MODULE_FORCE_UNLOAD
639 static inline int try_force_unload(unsigned int flags)
641 int ret = (flags & O_TRUNC);
643 add_taint(TAINT_FORCED_RMMOD);
647 static inline int try_force_unload(unsigned int flags)
651 #endif /* CONFIG_MODULE_FORCE_UNLOAD */
660 /* Whole machine is stopped with interrupts off when this runs. */
661 static int __try_stop_module(void *_sref)
663 struct stopref *sref = _sref;
665 /* If it's not unused, quit unless we're forcing. */
666 if (module_refcount(sref->mod) != 0) {
667 if (!(*sref->forced = try_force_unload(sref->flags)))
671 /* Mark it as dying. */
672 sref->mod->state = MODULE_STATE_GOING;
676 static int try_stop_module(struct module *mod, int flags, int *forced)
678 if (flags & O_NONBLOCK) {
679 struct stopref sref = { mod, flags, forced };
681 return stop_machine(__try_stop_module, &sref, NULL);
683 /* We don't need to stop the machine for this. */
684 mod->state = MODULE_STATE_GOING;
690 unsigned int module_refcount(struct module *mod)
692 unsigned int i, total = 0;
694 for (i = 0; i < NR_CPUS; i++)
695 total += local_read(&mod->ref[i].count);
698 EXPORT_SYMBOL(module_refcount);
700 /* This exists whether we can unload or not */
701 static void free_module(struct module *mod);
703 static void wait_for_zero_refcount(struct module *mod)
705 /* Since we might sleep for some time, release the mutex first */
706 mutex_unlock(&module_mutex);
708 DEBUGP("Looking at refcount...\n");
709 set_current_state(TASK_UNINTERRUPTIBLE);
710 if (module_refcount(mod) == 0)
714 current->state = TASK_RUNNING;
715 mutex_lock(&module_mutex);
719 sys_delete_module(const char __user *name_user, unsigned int flags)
722 char name[MODULE_NAME_LEN];
725 if (!capable(CAP_SYS_MODULE))
728 if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
730 name[MODULE_NAME_LEN-1] = '\0';
732 if (mutex_lock_interruptible(&module_mutex) != 0)
735 mod = find_module(name);
741 if (!list_empty(&mod->modules_which_use_me)) {
742 /* Other modules depend on us: get rid of them first. */
747 /* Doing init or already dying? */
748 if (mod->state != MODULE_STATE_LIVE) {
749 /* FIXME: if (force), slam module count and wake up
751 DEBUGP("%s already dying\n", mod->name);
756 /* If it has an init func, it must have an exit func to unload */
757 if (mod->init && !mod->exit) {
758 forced = try_force_unload(flags);
760 /* This module can't be removed */
766 /* Set this up before setting mod->state */
767 mod->waiter = current;
769 /* Stop the machine so refcounts can't move and disable module. */
770 ret = try_stop_module(mod, flags, &forced);
774 /* Never wait if forced. */
775 if (!forced && module_refcount(mod) != 0)
776 wait_for_zero_refcount(mod);
778 mutex_unlock(&module_mutex);
779 /* Final destruction now noone is using it. */
780 if (mod->exit != NULL)
782 blocking_notifier_call_chain(&module_notify_list,
783 MODULE_STATE_GOING, mod);
784 mutex_lock(&module_mutex);
785 /* Store the name of the last unloaded module for diagnostic purposes */
786 strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
790 mutex_unlock(&module_mutex);
794 static void print_unload_info(struct seq_file *m, struct module *mod)
796 struct module_use *use;
797 int printed_something = 0;
799 seq_printf(m, " %u ", module_refcount(mod));
801 /* Always include a trailing , so userspace can differentiate
802 between this and the old multi-field proc format. */
803 list_for_each_entry(use, &mod->modules_which_use_me, list) {
804 printed_something = 1;
805 seq_printf(m, "%s,", use->module_which_uses->name);
808 if (mod->init != NULL && mod->exit == NULL) {
809 printed_something = 1;
810 seq_printf(m, "[permanent],");
813 if (!printed_something)
817 void __symbol_put(const char *symbol)
819 struct module *owner;
822 if (IS_ERR_VALUE(find_symbol(symbol, &owner, NULL, true, false)))
827 EXPORT_SYMBOL(__symbol_put);
829 void symbol_put_addr(void *addr)
831 struct module *modaddr;
833 if (core_kernel_text((unsigned long)addr))
836 if (!(modaddr = module_text_address((unsigned long)addr)))
840 EXPORT_SYMBOL_GPL(symbol_put_addr);
842 static ssize_t show_refcnt(struct module_attribute *mattr,
843 struct module *mod, char *buffer)
845 return sprintf(buffer, "%u\n", module_refcount(mod));
848 static struct module_attribute refcnt = {
849 .attr = { .name = "refcnt", .mode = 0444 },
853 void module_put(struct module *module)
856 unsigned int cpu = get_cpu();
857 local_dec(&module->ref[cpu].count);
858 /* Maybe they're waiting for us to drop reference? */
859 if (unlikely(!module_is_live(module)))
860 wake_up_process(module->waiter);
864 EXPORT_SYMBOL(module_put);
866 #else /* !CONFIG_MODULE_UNLOAD */
867 static void print_unload_info(struct seq_file *m, struct module *mod)
869 /* We don't know the usage count, or what modules are using. */
870 seq_printf(m, " - -");
873 static inline void module_unload_free(struct module *mod)
877 static inline int use_module(struct module *a, struct module *b)
879 return strong_try_module_get(b) == 0;
882 static inline void module_unload_init(struct module *mod)
885 #endif /* CONFIG_MODULE_UNLOAD */
887 static ssize_t show_initstate(struct module_attribute *mattr,
888 struct module *mod, char *buffer)
890 const char *state = "unknown";
892 switch (mod->state) {
893 case MODULE_STATE_LIVE:
896 case MODULE_STATE_COMING:
899 case MODULE_STATE_GOING:
903 return sprintf(buffer, "%s\n", state);
906 static struct module_attribute initstate = {
907 .attr = { .name = "initstate", .mode = 0444 },
908 .show = show_initstate,
911 static struct module_attribute *modinfo_attrs[] = {
915 #ifdef CONFIG_MODULE_UNLOAD
921 static const char vermagic[] = VERMAGIC_STRING;
923 static int try_to_force_load(struct module *mod, const char *symname)
925 #ifdef CONFIG_MODULE_FORCE_LOAD
926 if (!(tainted & TAINT_FORCED_MODULE))
927 printk("%s: no version for \"%s\" found: kernel tainted.\n",
929 add_taint_module(mod, TAINT_FORCED_MODULE);
936 #ifdef CONFIG_MODVERSIONS
937 static int check_version(Elf_Shdr *sechdrs,
938 unsigned int versindex,
941 const unsigned long *crc)
943 unsigned int i, num_versions;
944 struct modversion_info *versions;
946 /* Exporting module didn't supply crcs? OK, we're already tainted. */
950 /* No versions at all? modprobe --force does this. */
952 return try_to_force_load(mod, symname) == 0;
954 versions = (void *) sechdrs[versindex].sh_addr;
955 num_versions = sechdrs[versindex].sh_size
956 / sizeof(struct modversion_info);
958 for (i = 0; i < num_versions; i++) {
959 if (strcmp(versions[i].name, symname) != 0)
962 if (versions[i].crc == *crc)
964 DEBUGP("Found checksum %lX vs module %lX\n",
965 *crc, versions[i].crc);
969 printk(KERN_WARNING "%s: no symbol version for %s\n",
974 printk("%s: disagrees about version of symbol %s\n",
979 static inline int check_modstruct_version(Elf_Shdr *sechdrs,
980 unsigned int versindex,
983 const unsigned long *crc;
985 if (IS_ERR_VALUE(find_symbol("struct_module", NULL, &crc, true, false)))
987 return check_version(sechdrs, versindex, "struct_module", mod, crc);
990 /* First part is kernel version, which we ignore if module has crcs. */
991 static inline int same_magic(const char *amagic, const char *bmagic,
995 amagic += strcspn(amagic, " ");
996 bmagic += strcspn(bmagic, " ");
998 return strcmp(amagic, bmagic) == 0;
1001 static inline int check_version(Elf_Shdr *sechdrs,
1002 unsigned int versindex,
1003 const char *symname,
1005 const unsigned long *crc)
1010 static inline int check_modstruct_version(Elf_Shdr *sechdrs,
1011 unsigned int versindex,
1017 static inline int same_magic(const char *amagic, const char *bmagic,
1020 return strcmp(amagic, bmagic) == 0;
1022 #endif /* CONFIG_MODVERSIONS */
1024 /* Resolve a symbol for this module. I.e. if we find one, record usage.
1025 Must be holding module_mutex. */
1026 static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
1027 unsigned int versindex,
1031 struct module *owner;
1033 const unsigned long *crc;
1035 ret = find_symbol(name, &owner, &crc,
1036 !(mod->taints & TAINT_PROPRIETARY_MODULE), true);
1037 if (!IS_ERR_VALUE(ret)) {
1038 /* use_module can fail due to OOM,
1039 or module initialization or unloading */
1040 if (!check_version(sechdrs, versindex, name, mod, crc) ||
1041 !use_module(mod, owner))
1048 * /sys/module/foo/sections stuff
1049 * J. Corbet <corbet@lwn.net>
1051 #if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
1052 struct module_sect_attr
1054 struct module_attribute mattr;
1056 unsigned long address;
1059 struct module_sect_attrs
1061 struct attribute_group grp;
1062 unsigned int nsections;
1063 struct module_sect_attr attrs[0];
1066 static ssize_t module_sect_show(struct module_attribute *mattr,
1067 struct module *mod, char *buf)
1069 struct module_sect_attr *sattr =
1070 container_of(mattr, struct module_sect_attr, mattr);
1071 return sprintf(buf, "0x%lx\n", sattr->address);
1074 static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
1076 unsigned int section;
1078 for (section = 0; section < sect_attrs->nsections; section++)
1079 kfree(sect_attrs->attrs[section].name);
1083 static void add_sect_attrs(struct module *mod, unsigned int nsect,
1084 char *secstrings, Elf_Shdr *sechdrs)
1086 unsigned int nloaded = 0, i, size[2];
1087 struct module_sect_attrs *sect_attrs;
1088 struct module_sect_attr *sattr;
1089 struct attribute **gattr;
1091 /* Count loaded sections and allocate structures */
1092 for (i = 0; i < nsect; i++)
1093 if (sechdrs[i].sh_flags & SHF_ALLOC)
1095 size[0] = ALIGN(sizeof(*sect_attrs)
1096 + nloaded * sizeof(sect_attrs->attrs[0]),
1097 sizeof(sect_attrs->grp.attrs[0]));
1098 size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
1099 sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL);
1100 if (sect_attrs == NULL)
1103 /* Setup section attributes. */
1104 sect_attrs->grp.name = "sections";
1105 sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
1107 sect_attrs->nsections = 0;
1108 sattr = §_attrs->attrs[0];
1109 gattr = §_attrs->grp.attrs[0];
1110 for (i = 0; i < nsect; i++) {
1111 if (! (sechdrs[i].sh_flags & SHF_ALLOC))
1113 sattr->address = sechdrs[i].sh_addr;
1114 sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
1116 if (sattr->name == NULL)
1118 sect_attrs->nsections++;
1119 sattr->mattr.show = module_sect_show;
1120 sattr->mattr.store = NULL;
1121 sattr->mattr.attr.name = sattr->name;
1122 sattr->mattr.attr.mode = S_IRUGO;
1123 *(gattr++) = &(sattr++)->mattr.attr;
1127 if (sysfs_create_group(&mod->mkobj.kobj, §_attrs->grp))
1130 mod->sect_attrs = sect_attrs;
1133 free_sect_attrs(sect_attrs);
1136 static void remove_sect_attrs(struct module *mod)
1138 if (mod->sect_attrs) {
1139 sysfs_remove_group(&mod->mkobj.kobj,
1140 &mod->sect_attrs->grp);
1141 /* We are positive that no one is using any sect attrs
1142 * at this point. Deallocate immediately. */
1143 free_sect_attrs(mod->sect_attrs);
1144 mod->sect_attrs = NULL;
1149 * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections.
1152 struct module_notes_attrs {
1153 struct kobject *dir;
1155 struct bin_attribute attrs[0];
1158 static ssize_t module_notes_read(struct kobject *kobj,
1159 struct bin_attribute *bin_attr,
1160 char *buf, loff_t pos, size_t count)
1163 * The caller checked the pos and count against our size.
1165 memcpy(buf, bin_attr->private + pos, count);
1169 static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
1172 if (notes_attrs->dir) {
1174 sysfs_remove_bin_file(notes_attrs->dir,
1175 ¬es_attrs->attrs[i]);
1176 kobject_del(notes_attrs->dir);
1181 static void add_notes_attrs(struct module *mod, unsigned int nsect,
1182 char *secstrings, Elf_Shdr *sechdrs)
1184 unsigned int notes, loaded, i;
1185 struct module_notes_attrs *notes_attrs;
1186 struct bin_attribute *nattr;
1188 /* Count notes sections and allocate structures. */
1190 for (i = 0; i < nsect; i++)
1191 if ((sechdrs[i].sh_flags & SHF_ALLOC) &&
1192 (sechdrs[i].sh_type == SHT_NOTE))
1198 notes_attrs = kzalloc(sizeof(*notes_attrs)
1199 + notes * sizeof(notes_attrs->attrs[0]),
1201 if (notes_attrs == NULL)
1204 notes_attrs->notes = notes;
1205 nattr = ¬es_attrs->attrs[0];
1206 for (loaded = i = 0; i < nsect; ++i) {
1207 if (!(sechdrs[i].sh_flags & SHF_ALLOC))
1209 if (sechdrs[i].sh_type == SHT_NOTE) {
1210 nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
1211 nattr->attr.mode = S_IRUGO;
1212 nattr->size = sechdrs[i].sh_size;
1213 nattr->private = (void *) sechdrs[i].sh_addr;
1214 nattr->read = module_notes_read;
1220 notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj);
1221 if (!notes_attrs->dir)
1224 for (i = 0; i < notes; ++i)
1225 if (sysfs_create_bin_file(notes_attrs->dir,
1226 ¬es_attrs->attrs[i]))
1229 mod->notes_attrs = notes_attrs;
1233 free_notes_attrs(notes_attrs, i);
1236 static void remove_notes_attrs(struct module *mod)
1238 if (mod->notes_attrs)
1239 free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes);
1244 static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
1245 char *sectstrings, Elf_Shdr *sechdrs)
1249 static inline void remove_sect_attrs(struct module *mod)
1253 static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
1254 char *sectstrings, Elf_Shdr *sechdrs)
1258 static inline void remove_notes_attrs(struct module *mod)
1264 int module_add_modinfo_attrs(struct module *mod)
1266 struct module_attribute *attr;
1267 struct module_attribute *temp_attr;
1271 mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) *
1272 (ARRAY_SIZE(modinfo_attrs) + 1)),
1274 if (!mod->modinfo_attrs)
1277 temp_attr = mod->modinfo_attrs;
1278 for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) {
1280 (attr->test && attr->test(mod))) {
1281 memcpy(temp_attr, attr, sizeof(*temp_attr));
1282 error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
1289 void module_remove_modinfo_attrs(struct module *mod)
1291 struct module_attribute *attr;
1294 for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) {
1295 /* pick a field to test for end of list */
1296 if (!attr->attr.name)
1298 sysfs_remove_file(&mod->mkobj.kobj,&attr->attr);
1302 kfree(mod->modinfo_attrs);
1305 int mod_sysfs_init(struct module *mod)
1308 struct kobject *kobj;
1310 if (!module_sysfs_initialized) {
1311 printk(KERN_ERR "%s: module sysfs not initialized\n",
1317 kobj = kset_find_obj(module_kset, mod->name);
1319 printk(KERN_ERR "%s: module is already loaded\n", mod->name);
1325 mod->mkobj.mod = mod;
1327 memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
1328 mod->mkobj.kobj.kset = module_kset;
1329 err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL,
1332 kobject_put(&mod->mkobj.kobj);
1334 /* delay uevent until full sysfs population */
1339 int mod_sysfs_setup(struct module *mod,
1340 struct kernel_param *kparam,
1341 unsigned int num_params)
1345 mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj);
1346 if (!mod->holders_dir) {
1351 err = module_param_sysfs_setup(mod, kparam, num_params);
1353 goto out_unreg_holders;
1355 err = module_add_modinfo_attrs(mod);
1357 goto out_unreg_param;
1359 kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
1363 module_param_sysfs_remove(mod);
1365 kobject_put(mod->holders_dir);
1367 kobject_put(&mod->mkobj.kobj);
1371 static void mod_sysfs_fini(struct module *mod)
1373 kobject_put(&mod->mkobj.kobj);
1376 #else /* CONFIG_SYSFS */
1378 static void mod_sysfs_fini(struct module *mod)
1382 #endif /* CONFIG_SYSFS */
1384 static void mod_kobject_remove(struct module *mod)
1386 module_remove_modinfo_attrs(mod);
1387 module_param_sysfs_remove(mod);
1388 kobject_put(mod->mkobj.drivers_dir);
1389 kobject_put(mod->holders_dir);
1390 mod_sysfs_fini(mod);
1394 * link the module with the whole machine is stopped with interrupts off
1395 * - this defends against kallsyms not taking locks
1397 static int __link_module(void *_mod)
1399 struct module *mod = _mod;
1400 list_add(&mod->list, &modules);
1405 * unlink the module with the whole machine is stopped with interrupts off
1406 * - this defends against kallsyms not taking locks
1408 static int __unlink_module(void *_mod)
1410 struct module *mod = _mod;
1411 list_del(&mod->list);
1415 /* Free a module, remove from lists, etc (must hold module_mutex). */
1416 static void free_module(struct module *mod)
1418 /* Delete from various lists */
1419 stop_machine(__unlink_module, mod, NULL);
1420 remove_notes_attrs(mod);
1421 remove_sect_attrs(mod);
1422 mod_kobject_remove(mod);
1424 unwind_remove_table(mod->unwind_info, 0);
1426 /* Arch-specific cleanup. */
1427 module_arch_cleanup(mod);
1429 /* Module unload stuff */
1430 module_unload_free(mod);
1432 /* This may be NULL, but that's OK */
1433 module_free(mod, mod->module_init);
1436 percpu_modfree(mod->percpu);
1438 /* Free lock-classes: */
1439 lockdep_free_key_range(mod->module_core, mod->core_size);
1441 /* Finally, free the core (containing the module structure) */
1442 module_free(mod, mod->module_core);
1445 void *__symbol_get(const char *symbol)
1447 struct module *owner;
1448 unsigned long value;
1451 value = find_symbol(symbol, &owner, NULL, true, true);
1452 if (IS_ERR_VALUE(value))
1454 else if (strong_try_module_get(owner))
1458 return (void *)value;
1460 EXPORT_SYMBOL_GPL(__symbol_get);
1463 * Ensure that an exported symbol [global namespace] does not already exist
1464 * in the kernel or in some other module's exported symbol table.
1466 static int verify_export_symbols(struct module *mod)
1469 struct module *owner;
1470 const struct kernel_symbol *s;
1472 const struct kernel_symbol *sym;
1475 { mod->syms, mod->num_syms },
1476 { mod->gpl_syms, mod->num_gpl_syms },
1477 { mod->gpl_future_syms, mod->num_gpl_future_syms },
1478 #ifdef CONFIG_UNUSED_SYMBOLS
1479 { mod->unused_syms, mod->num_unused_syms },
1480 { mod->unused_gpl_syms, mod->num_unused_gpl_syms },
1484 for (i = 0; i < ARRAY_SIZE(arr); i++) {
1485 for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) {
1486 if (!IS_ERR_VALUE(find_symbol(s->name, &owner,
1487 NULL, true, false))) {
1489 "%s: exports duplicate symbol %s"
1491 mod->name, s->name, module_name(owner));
1499 /* Change all symbols so that st_value encodes the pointer directly. */
1500 static int simplify_symbols(Elf_Shdr *sechdrs,
1501 unsigned int symindex,
1503 unsigned int versindex,
1504 unsigned int pcpuindex,
1507 Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
1508 unsigned long secbase;
1509 unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
1512 for (i = 1; i < n; i++) {
1513 switch (sym[i].st_shndx) {
1515 /* We compiled with -fno-common. These are not
1516 supposed to happen. */
1517 DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
1518 printk("%s: please compile with -fno-common\n",
1524 /* Don't need to do anything */
1525 DEBUGP("Absolute symbol: 0x%08lx\n",
1526 (long)sym[i].st_value);
1531 = resolve_symbol(sechdrs, versindex,
1532 strtab + sym[i].st_name, mod);
1534 /* Ok if resolved. */
1535 if (!IS_ERR_VALUE(sym[i].st_value))
1538 if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
1541 printk(KERN_WARNING "%s: Unknown symbol %s\n",
1542 mod->name, strtab + sym[i].st_name);
1547 /* Divert to percpu allocation if a percpu var. */
1548 if (sym[i].st_shndx == pcpuindex)
1549 secbase = (unsigned long)mod->percpu;
1551 secbase = sechdrs[sym[i].st_shndx].sh_addr;
1552 sym[i].st_value += secbase;
1560 /* Update size with this section: return offset. */
1561 static long get_offset(unsigned int *size, Elf_Shdr *sechdr)
1565 ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
1566 *size = ret + sechdr->sh_size;
1570 /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld
1571 might -- code, read-only data, read-write data, small data. Tally
1572 sizes, and place the offsets into sh_entsize fields: high bit means it
1574 static void layout_sections(struct module *mod,
1575 const Elf_Ehdr *hdr,
1577 const char *secstrings)
1579 static unsigned long const masks[][2] = {
1580 /* NOTE: all executable code must be the first section
1581 * in this array; otherwise modify the text_size
1582 * finder in the two loops below */
1583 { SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL },
1584 { SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL },
1585 { SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL },
1586 { ARCH_SHF_SMALL | SHF_ALLOC, 0 }
1590 for (i = 0; i < hdr->e_shnum; i++)
1591 sechdrs[i].sh_entsize = ~0UL;
1593 DEBUGP("Core section allocation order:\n");
1594 for (m = 0; m < ARRAY_SIZE(masks); ++m) {
1595 for (i = 0; i < hdr->e_shnum; ++i) {
1596 Elf_Shdr *s = &sechdrs[i];
1598 if ((s->sh_flags & masks[m][0]) != masks[m][0]
1599 || (s->sh_flags & masks[m][1])
1600 || s->sh_entsize != ~0UL
1601 || strncmp(secstrings + s->sh_name,
1604 s->sh_entsize = get_offset(&mod->core_size, s);
1605 DEBUGP("\t%s\n", secstrings + s->sh_name);
1608 mod->core_text_size = mod->core_size;
1611 DEBUGP("Init section allocation order:\n");
1612 for (m = 0; m < ARRAY_SIZE(masks); ++m) {
1613 for (i = 0; i < hdr->e_shnum; ++i) {
1614 Elf_Shdr *s = &sechdrs[i];
1616 if ((s->sh_flags & masks[m][0]) != masks[m][0]
1617 || (s->sh_flags & masks[m][1])
1618 || s->sh_entsize != ~0UL
1619 || strncmp(secstrings + s->sh_name,
1622 s->sh_entsize = (get_offset(&mod->init_size, s)
1623 | INIT_OFFSET_MASK);
1624 DEBUGP("\t%s\n", secstrings + s->sh_name);
1627 mod->init_text_size = mod->init_size;
1631 static void set_license(struct module *mod, const char *license)
1634 license = "unspecified";
1636 if (!license_is_gpl_compatible(license)) {
1637 if (!(tainted & TAINT_PROPRIETARY_MODULE))
1638 printk(KERN_WARNING "%s: module license '%s' taints "
1639 "kernel.\n", mod->name, license);
1640 add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
1644 /* Parse tag=value strings from .modinfo section */
1645 static char *next_string(char *string, unsigned long *secsize)
1647 /* Skip non-zero chars */
1650 if ((*secsize)-- <= 1)
1654 /* Skip any zero padding. */
1655 while (!string[0]) {
1657 if ((*secsize)-- <= 1)
1663 static char *get_modinfo(Elf_Shdr *sechdrs,
1668 unsigned int taglen = strlen(tag);
1669 unsigned long size = sechdrs[info].sh_size;
1671 for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) {
1672 if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
1673 return p + taglen + 1;
1678 static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
1679 unsigned int infoindex)
1681 struct module_attribute *attr;
1684 for (i = 0; (attr = modinfo_attrs[i]); i++) {
1687 get_modinfo(sechdrs,
1693 #ifdef CONFIG_KALLSYMS
1695 /* lookup symbol in given range of kernel_symbols */
1696 static const struct kernel_symbol *lookup_symbol(const char *name,
1697 const struct kernel_symbol *start,
1698 const struct kernel_symbol *stop)
1700 const struct kernel_symbol *ks = start;
1701 for (; ks < stop; ks++)
1702 if (strcmp(ks->name, name) == 0)
1707 static int is_exported(const char *name, const struct module *mod)
1709 if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
1712 if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
1719 static char elf_type(const Elf_Sym *sym,
1721 const char *secstrings,
1724 if (ELF_ST_BIND(sym->st_info) == STB_WEAK) {
1725 if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT)
1730 if (sym->st_shndx == SHN_UNDEF)
1732 if (sym->st_shndx == SHN_ABS)
1734 if (sym->st_shndx >= SHN_LORESERVE)
1736 if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR)
1738 if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC
1739 && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) {
1740 if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE))
1742 else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
1747 if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) {
1748 if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
1753 if (strncmp(secstrings + sechdrs[sym->st_shndx].sh_name,
1754 ".debug", strlen(".debug")) == 0)
1759 static void add_kallsyms(struct module *mod,
1761 unsigned int symindex,
1762 unsigned int strindex,
1763 const char *secstrings)
1767 mod->symtab = (void *)sechdrs[symindex].sh_addr;
1768 mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
1769 mod->strtab = (void *)sechdrs[strindex].sh_addr;
1771 /* Set types up while we still have access to sections. */
1772 for (i = 0; i < mod->num_symtab; i++)
1773 mod->symtab[i].st_info
1774 = elf_type(&mod->symtab[i], sechdrs, secstrings, mod);
1777 static inline void add_kallsyms(struct module *mod,
1779 unsigned int symindex,
1780 unsigned int strindex,
1781 const char *secstrings)
1784 #endif /* CONFIG_KALLSYMS */
1786 static void *module_alloc_update_bounds(unsigned long size)
1788 void *ret = module_alloc(size);
1791 /* Update module bounds. */
1792 if ((unsigned long)ret < module_addr_min)
1793 module_addr_min = (unsigned long)ret;
1794 if ((unsigned long)ret + size > module_addr_max)
1795 module_addr_max = (unsigned long)ret + size;
1800 /* Allocate and load the module: note that size of section 0 is always
1801 zero, and we rely on this for optional sections. */
1802 static noinline struct module *load_module(void __user *umod,
1804 const char __user *uargs)
1808 char *secstrings, *args, *modmagic, *strtab = NULL;
1811 unsigned int symindex = 0;
1812 unsigned int strindex = 0;
1813 unsigned int setupindex;
1814 unsigned int exindex;
1815 unsigned int exportindex;
1816 unsigned int modindex;
1817 unsigned int obsparmindex;
1818 unsigned int infoindex;
1819 unsigned int gplindex;
1820 unsigned int crcindex;
1821 unsigned int gplcrcindex;
1822 unsigned int versindex;
1823 unsigned int pcpuindex;
1824 unsigned int gplfutureindex;
1825 unsigned int gplfuturecrcindex;
1826 unsigned int unwindex = 0;
1827 #ifdef CONFIG_UNUSED_SYMBOLS
1828 unsigned int unusedindex;
1829 unsigned int unusedcrcindex;
1830 unsigned int unusedgplindex;
1831 unsigned int unusedgplcrcindex;
1833 unsigned int markersindex;
1834 unsigned int markersstringsindex;
1837 void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
1838 struct exception_table_entry *extable;
1839 mm_segment_t old_fs;
1841 DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
1843 if (len < sizeof(*hdr))
1844 return ERR_PTR(-ENOEXEC);
1846 /* Suck in entire file: we'll want most of it. */
1847 /* vmalloc barfs on "unusual" numbers. Check here */
1848 if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
1849 return ERR_PTR(-ENOMEM);
1850 if (copy_from_user(hdr, umod, len) != 0) {
1855 /* Sanity checks against insmoding binaries or wrong arch,
1856 weird elf version */
1857 if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0
1858 || hdr->e_type != ET_REL
1859 || !elf_check_arch(hdr)
1860 || hdr->e_shentsize != sizeof(*sechdrs)) {
1865 if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr))
1868 /* Convenience variables */
1869 sechdrs = (void *)hdr + hdr->e_shoff;
1870 secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
1871 sechdrs[0].sh_addr = 0;
1873 for (i = 1; i < hdr->e_shnum; i++) {
1874 if (sechdrs[i].sh_type != SHT_NOBITS
1875 && len < sechdrs[i].sh_offset + sechdrs[i].sh_size)
1878 /* Mark all sections sh_addr with their address in the
1880 sechdrs[i].sh_addr = (size_t)hdr + sechdrs[i].sh_offset;
1882 /* Internal symbols and strings. */
1883 if (sechdrs[i].sh_type == SHT_SYMTAB) {
1885 strindex = sechdrs[i].sh_link;
1886 strtab = (char *)hdr + sechdrs[strindex].sh_offset;
1888 #ifndef CONFIG_MODULE_UNLOAD
1889 /* Don't load .exit sections */
1890 if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
1891 sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
1895 modindex = find_sec(hdr, sechdrs, secstrings,
1896 ".gnu.linkonce.this_module");
1898 printk(KERN_WARNING "No module found in object\n");
1902 mod = (void *)sechdrs[modindex].sh_addr;
1904 if (symindex == 0) {
1905 printk(KERN_WARNING "%s: module has no symbols (stripped?)\n",
1911 /* Optional sections */
1912 exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab");
1913 gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl");
1914 gplfutureindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl_future");
1915 crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab");
1916 gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl");
1917 gplfuturecrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl_future");
1918 #ifdef CONFIG_UNUSED_SYMBOLS
1919 unusedindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused");
1920 unusedgplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused_gpl");
1921 unusedcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused");
1922 unusedgplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused_gpl");
1924 setupindex = find_sec(hdr, sechdrs, secstrings, "__param");
1925 exindex = find_sec(hdr, sechdrs, secstrings, "__ex_table");
1926 obsparmindex = find_sec(hdr, sechdrs, secstrings, "__obsparm");
1927 versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
1928 infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
1929 pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
1930 #ifdef ARCH_UNWIND_SECTION_NAME
1931 unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
1934 /* Don't keep modinfo and version sections. */
1935 sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
1936 sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
1937 #ifdef CONFIG_KALLSYMS
1938 /* Keep symbol and string tables for decoding later. */
1939 sechdrs[symindex].sh_flags |= SHF_ALLOC;
1940 sechdrs[strindex].sh_flags |= SHF_ALLOC;
1943 sechdrs[unwindex].sh_flags |= SHF_ALLOC;
1945 /* Check module struct version now, before we try to use module. */
1946 if (!check_modstruct_version(sechdrs, versindex, mod)) {
1951 modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
1952 /* This is allowed: modprobe --force will invalidate it. */
1954 err = try_to_force_load(mod, "magic");
1957 } else if (!same_magic(modmagic, vermagic, versindex)) {
1958 printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
1959 mod->name, modmagic, vermagic);
1964 staging = get_modinfo(sechdrs, infoindex, "staging");
1966 add_taint_module(mod, TAINT_CRAP);
1967 printk(KERN_WARNING "%s: module is from the staging directory,"
1968 " the quality is unknown, you have been warned.\n",
1972 /* Now copy in args */
1973 args = strndup_user(uargs, ~0UL >> 1);
1975 err = PTR_ERR(args);
1979 if (find_module(mod->name)) {
1984 mod->state = MODULE_STATE_COMING;
1986 /* Allow arches to frob section contents and sizes. */
1987 err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod);
1992 /* We have a special allocation for this section. */
1993 percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size,
1994 sechdrs[pcpuindex].sh_addralign,
2000 sechdrs[pcpuindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
2001 mod->percpu = percpu;
2004 /* Determine total sizes, and put offsets in sh_entsize. For now
2005 this is done generically; there doesn't appear to be any
2006 special cases for the architectures. */
2007 layout_sections(mod, hdr, sechdrs, secstrings);
2009 /* Do the allocs. */
2010 ptr = module_alloc_update_bounds(mod->core_size);
2015 memset(ptr, 0, mod->core_size);
2016 mod->module_core = ptr;
2018 ptr = module_alloc_update_bounds(mod->init_size);
2019 if (!ptr && mod->init_size) {
2023 memset(ptr, 0, mod->init_size);
2024 mod->module_init = ptr;
2026 /* Transfer each section which specifies SHF_ALLOC */
2027 DEBUGP("final section addresses:\n");
2028 for (i = 0; i < hdr->e_shnum; i++) {
2031 if (!(sechdrs[i].sh_flags & SHF_ALLOC))
2034 if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK)
2035 dest = mod->module_init
2036 + (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK);
2038 dest = mod->module_core + sechdrs[i].sh_entsize;
2040 if (sechdrs[i].sh_type != SHT_NOBITS)
2041 memcpy(dest, (void *)sechdrs[i].sh_addr,
2042 sechdrs[i].sh_size);
2043 /* Update sh_addr to point to copy in image. */
2044 sechdrs[i].sh_addr = (unsigned long)dest;
2045 DEBUGP("\t0x%lx %s\n", sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name);
2047 /* Module has been moved. */
2048 mod = (void *)sechdrs[modindex].sh_addr;
2050 /* Now we've moved module, initialize linked lists, etc. */
2051 module_unload_init(mod);
2053 /* add kobject, so we can reference it. */
2054 err = mod_sysfs_init(mod);
2058 /* Set up license info based on the info section */
2059 set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
2062 * ndiswrapper is under GPL by itself, but loads proprietary modules.
2063 * Don't use add_taint_module(), as it would prevent ndiswrapper from
2064 * using GPL-only symbols it needs.
2066 if (strcmp(mod->name, "ndiswrapper") == 0)
2067 add_taint(TAINT_PROPRIETARY_MODULE);
2069 /* driverloader was caught wrongly pretending to be under GPL */
2070 if (strcmp(mod->name, "driverloader") == 0)
2071 add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
2073 /* Set up MODINFO_ATTR fields */
2074 setup_modinfo(mod, sechdrs, infoindex);
2076 /* Fix up syms, so that st_value is a pointer to location. */
2077 err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex,
2082 /* Set up EXPORTed & EXPORT_GPLed symbols (section 0 is 0 length) */
2083 mod->num_syms = sechdrs[exportindex].sh_size / sizeof(*mod->syms);
2084 mod->syms = (void *)sechdrs[exportindex].sh_addr;
2086 mod->crcs = (void *)sechdrs[crcindex].sh_addr;
2087 mod->num_gpl_syms = sechdrs[gplindex].sh_size / sizeof(*mod->gpl_syms);
2088 mod->gpl_syms = (void *)sechdrs[gplindex].sh_addr;
2090 mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr;
2091 mod->num_gpl_future_syms = sechdrs[gplfutureindex].sh_size /
2092 sizeof(*mod->gpl_future_syms);
2093 mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr;
2094 if (gplfuturecrcindex)
2095 mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr;
2097 #ifdef CONFIG_UNUSED_SYMBOLS
2098 mod->num_unused_syms = sechdrs[unusedindex].sh_size /
2099 sizeof(*mod->unused_syms);
2100 mod->num_unused_gpl_syms = sechdrs[unusedgplindex].sh_size /
2101 sizeof(*mod->unused_gpl_syms);
2102 mod->unused_syms = (void *)sechdrs[unusedindex].sh_addr;
2104 mod->unused_crcs = (void *)sechdrs[unusedcrcindex].sh_addr;
2105 mod->unused_gpl_syms = (void *)sechdrs[unusedgplindex].sh_addr;
2106 if (unusedgplcrcindex)
2107 mod->unused_gpl_crcs
2108 = (void *)sechdrs[unusedgplcrcindex].sh_addr;
2111 #ifdef CONFIG_MODVERSIONS
2112 if ((mod->num_syms && !crcindex)
2113 || (mod->num_gpl_syms && !gplcrcindex)
2114 || (mod->num_gpl_future_syms && !gplfuturecrcindex)
2115 #ifdef CONFIG_UNUSED_SYMBOLS
2116 || (mod->num_unused_syms && !unusedcrcindex)
2117 || (mod->num_unused_gpl_syms && !unusedgplcrcindex)
2120 printk(KERN_WARNING "%s: No versions for exported symbols.\n", mod->name);
2121 err = try_to_force_load(mod, "nocrc");
2126 markersindex = find_sec(hdr, sechdrs, secstrings, "__markers");
2127 markersstringsindex = find_sec(hdr, sechdrs, secstrings,
2128 "__markers_strings");
2130 /* Now do relocations. */
2131 for (i = 1; i < hdr->e_shnum; i++) {
2132 const char *strtab = (char *)sechdrs[strindex].sh_addr;
2133 unsigned int info = sechdrs[i].sh_info;
2135 /* Not a valid relocation section? */
2136 if (info >= hdr->e_shnum)
2139 /* Don't bother with non-allocated sections */
2140 if (!(sechdrs[info].sh_flags & SHF_ALLOC))
2143 if (sechdrs[i].sh_type == SHT_REL)
2144 err = apply_relocate(sechdrs, strtab, symindex, i,mod);
2145 else if (sechdrs[i].sh_type == SHT_RELA)
2146 err = apply_relocate_add(sechdrs, strtab, symindex, i,
2151 #ifdef CONFIG_MARKERS
2152 mod->markers = (void *)sechdrs[markersindex].sh_addr;
2154 sechdrs[markersindex].sh_size / sizeof(*mod->markers);
2157 /* Find duplicate symbols */
2158 err = verify_export_symbols(mod);
2163 /* Set up and sort exception table */
2164 mod->num_exentries = sechdrs[exindex].sh_size / sizeof(*mod->extable);
2165 mod->extable = extable = (void *)sechdrs[exindex].sh_addr;
2166 sort_extable(extable, extable + mod->num_exentries);
2168 /* Finally, copy percpu area over. */
2169 percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
2170 sechdrs[pcpuindex].sh_size);
2172 add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
2174 #ifdef CONFIG_MARKERS
2176 marker_update_probe_range(mod->markers,
2177 mod->markers + mod->num_markers);
2179 err = module_finalize(hdr, sechdrs, mod);
2183 /* flush the icache in correct context */
2188 * Flush the instruction cache, since we've played with text.
2189 * Do it before processing of module parameters, so the module
2190 * can provide parameter accessor functions of its own.
2192 if (mod->module_init)
2193 flush_icache_range((unsigned long)mod->module_init,
2194 (unsigned long)mod->module_init
2196 flush_icache_range((unsigned long)mod->module_core,
2197 (unsigned long)mod->module_core + mod->core_size);
2203 printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
2206 /* Now sew it into the lists so we can get lockdep and oops
2207 * info during argument parsing. Noone should access us, since
2208 * strong_try_module_get() will fail. */
2209 stop_machine(__link_module, mod, NULL);
2211 /* Size of section 0 is 0, so this works well if no params */
2212 err = parse_args(mod->name, mod->args,
2213 (struct kernel_param *)
2214 sechdrs[setupindex].sh_addr,
2215 sechdrs[setupindex].sh_size
2216 / sizeof(struct kernel_param),
2221 err = mod_sysfs_setup(mod,
2222 (struct kernel_param *)
2223 sechdrs[setupindex].sh_addr,
2224 sechdrs[setupindex].sh_size
2225 / sizeof(struct kernel_param));
2228 add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
2229 add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
2231 /* Size of section 0 is 0, so this works well if no unwind info. */
2232 mod->unwind_info = unwind_add_table(mod,
2233 (void *)sechdrs[unwindex].sh_addr,
2234 sechdrs[unwindex].sh_size);
2236 /* Get rid of temporary copy */
2243 stop_machine(__unlink_module, mod, NULL);
2244 module_arch_cleanup(mod);
2246 kobject_del(&mod->mkobj.kobj);
2247 kobject_put(&mod->mkobj.kobj);
2249 module_unload_free(mod);
2250 module_free(mod, mod->module_init);
2252 module_free(mod, mod->module_core);
2255 percpu_modfree(percpu);
2260 return ERR_PTR(err);
2263 printk(KERN_ERR "Module len %lu truncated\n", len);
2268 /* This is where the real work happens */
2270 sys_init_module(void __user *umod,
2272 const char __user *uargs)
2277 /* Must have permission */
2278 if (!capable(CAP_SYS_MODULE))
2281 /* Only one module load at a time, please */
2282 if (mutex_lock_interruptible(&module_mutex) != 0)
2285 /* Do all the hard work */
2286 mod = load_module(umod, len, uargs);
2288 mutex_unlock(&module_mutex);
2289 return PTR_ERR(mod);
2292 /* Drop lock so they can recurse */
2293 mutex_unlock(&module_mutex);
2295 blocking_notifier_call_chain(&module_notify_list,
2296 MODULE_STATE_COMING, mod);
2298 /* Start the module */
2299 if (mod->init != NULL)
2300 ret = do_one_initcall(mod->init);
2302 /* Init routine failed: abort. Try to protect us from
2303 buggy refcounters. */
2304 mod->state = MODULE_STATE_GOING;
2305 synchronize_sched();
2307 blocking_notifier_call_chain(&module_notify_list,
2308 MODULE_STATE_GOING, mod);
2309 mutex_lock(&module_mutex);
2311 mutex_unlock(&module_mutex);
2312 wake_up(&module_wq);
2316 printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, "
2317 "it should follow 0/-E convention\n"
2318 KERN_WARNING "%s: loading module anyway...\n",
2319 __func__, mod->name, ret,
2324 /* Now it's a first class citizen! Wake up anyone waiting for it. */
2325 mod->state = MODULE_STATE_LIVE;
2326 wake_up(&module_wq);
2328 mutex_lock(&module_mutex);
2329 /* Drop initial reference. */
2331 unwind_remove_table(mod->unwind_info, 1);
2332 module_free(mod, mod->module_init);
2333 mod->module_init = NULL;
2335 mod->init_text_size = 0;
2336 mutex_unlock(&module_mutex);
2341 static inline int within(unsigned long addr, void *start, unsigned long size)
2343 return ((void *)addr >= start && (void *)addr < start + size);
2346 #ifdef CONFIG_KALLSYMS
2348 * This ignores the intensely annoying "mapping symbols" found
2349 * in ARM ELF files: $a, $t and $d.
2351 static inline int is_arm_mapping_symbol(const char *str)
2353 return str[0] == '$' && strchr("atd", str[1])
2354 && (str[2] == '\0' || str[2] == '.');
2357 static const char *get_ksymbol(struct module *mod,
2359 unsigned long *size,
2360 unsigned long *offset)
2362 unsigned int i, best = 0;
2363 unsigned long nextval;
2365 /* At worse, next value is at end of module */
2366 if (within(addr, mod->module_init, mod->init_size))
2367 nextval = (unsigned long)mod->module_init+mod->init_text_size;
2369 nextval = (unsigned long)mod->module_core+mod->core_text_size;
2371 /* Scan for closest preceeding symbol, and next symbol. (ELF
2372 starts real symbols at 1). */
2373 for (i = 1; i < mod->num_symtab; i++) {
2374 if (mod->symtab[i].st_shndx == SHN_UNDEF)
2377 /* We ignore unnamed symbols: they're uninformative
2378 * and inserted at a whim. */
2379 if (mod->symtab[i].st_value <= addr
2380 && mod->symtab[i].st_value > mod->symtab[best].st_value
2381 && *(mod->strtab + mod->symtab[i].st_name) != '\0'
2382 && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
2384 if (mod->symtab[i].st_value > addr
2385 && mod->symtab[i].st_value < nextval
2386 && *(mod->strtab + mod->symtab[i].st_name) != '\0'
2387 && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
2388 nextval = mod->symtab[i].st_value;
2395 *size = nextval - mod->symtab[best].st_value;
2397 *offset = addr - mod->symtab[best].st_value;
2398 return mod->strtab + mod->symtab[best].st_name;
2401 /* For kallsyms to ask for address resolution. NULL means not found. Careful
2402 * not to lock to avoid deadlock on oopses, simply disable preemption. */
2403 const char *module_address_lookup(unsigned long addr,
2404 unsigned long *size,
2405 unsigned long *offset,
2410 const char *ret = NULL;
2413 list_for_each_entry(mod, &modules, list) {
2414 if (within(addr, mod->module_init, mod->init_size)
2415 || within(addr, mod->module_core, mod->core_size)) {
2417 *modname = mod->name;
2418 ret = get_ksymbol(mod, addr, size, offset);
2422 /* Make a copy in here where it's safe */
2424 strncpy(namebuf, ret, KSYM_NAME_LEN - 1);
2431 int lookup_module_symbol_name(unsigned long addr, char *symname)
2436 list_for_each_entry(mod, &modules, list) {
2437 if (within(addr, mod->module_init, mod->init_size) ||
2438 within(addr, mod->module_core, mod->core_size)) {
2441 sym = get_ksymbol(mod, addr, NULL, NULL);
2444 strlcpy(symname, sym, KSYM_NAME_LEN);
2454 int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
2455 unsigned long *offset, char *modname, char *name)
2460 list_for_each_entry(mod, &modules, list) {
2461 if (within(addr, mod->module_init, mod->init_size) ||
2462 within(addr, mod->module_core, mod->core_size)) {
2465 sym = get_ksymbol(mod, addr, size, offset);
2469 strlcpy(modname, mod->name, MODULE_NAME_LEN);
2471 strlcpy(name, sym, KSYM_NAME_LEN);
2481 int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
2482 char *name, char *module_name, int *exported)
2487 list_for_each_entry(mod, &modules, list) {
2488 if (symnum < mod->num_symtab) {
2489 *value = mod->symtab[symnum].st_value;
2490 *type = mod->symtab[symnum].st_info;
2491 strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
2493 strlcpy(module_name, mod->name, MODULE_NAME_LEN);
2494 *exported = is_exported(name, mod);
2498 symnum -= mod->num_symtab;
2504 static unsigned long mod_find_symname(struct module *mod, const char *name)
2508 for (i = 0; i < mod->num_symtab; i++)
2509 if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 &&
2510 mod->symtab[i].st_info != 'U')
2511 return mod->symtab[i].st_value;
2515 /* Look for this name: can be of form module:name. */
2516 unsigned long module_kallsyms_lookup_name(const char *name)
2520 unsigned long ret = 0;
2522 /* Don't lock: we're in enough trouble already. */
2524 if ((colon = strchr(name, ':')) != NULL) {
2526 if ((mod = find_module(name)) != NULL)
2527 ret = mod_find_symname(mod, colon+1);
2530 list_for_each_entry(mod, &modules, list)
2531 if ((ret = mod_find_symname(mod, name)) != 0)
2537 #endif /* CONFIG_KALLSYMS */
2539 /* Called by the /proc file system to return a list of modules. */
2540 static void *m_start(struct seq_file *m, loff_t *pos)
2542 mutex_lock(&module_mutex);
2543 return seq_list_start(&modules, *pos);
2546 static void *m_next(struct seq_file *m, void *p, loff_t *pos)
2548 return seq_list_next(p, &modules, pos);
2551 static void m_stop(struct seq_file *m, void *p)
2553 mutex_unlock(&module_mutex);
2556 static char *module_flags(struct module *mod, char *buf)
2561 mod->state == MODULE_STATE_GOING ||
2562 mod->state == MODULE_STATE_COMING) {
2564 if (mod->taints & TAINT_PROPRIETARY_MODULE)
2566 if (mod->taints & TAINT_FORCED_MODULE)
2568 if (mod->taints & TAINT_CRAP)
2571 * TAINT_FORCED_RMMOD: could be added.
2572 * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
2576 /* Show a - for module-is-being-unloaded */
2577 if (mod->state == MODULE_STATE_GOING)
2579 /* Show a + for module-is-being-loaded */
2580 if (mod->state == MODULE_STATE_COMING)
2589 static int m_show(struct seq_file *m, void *p)
2591 struct module *mod = list_entry(p, struct module, list);
2594 seq_printf(m, "%s %u",
2595 mod->name, mod->init_size + mod->core_size);
2596 print_unload_info(m, mod);
2598 /* Informative for users. */
2599 seq_printf(m, " %s",
2600 mod->state == MODULE_STATE_GOING ? "Unloading":
2601 mod->state == MODULE_STATE_COMING ? "Loading":
2603 /* Used by oprofile and other similar tools. */
2604 seq_printf(m, " 0x%p", mod->module_core);
2608 seq_printf(m, " %s", module_flags(mod, buf));
2610 seq_printf(m, "\n");
2614 /* Format: modulename size refcount deps address
2616 Where refcount is a number or -, and deps is a comma-separated list
2619 const struct seq_operations modules_op = {
2626 /* Given an address, look for it in the module exception tables. */
2627 const struct exception_table_entry *search_module_extables(unsigned long addr)
2629 const struct exception_table_entry *e = NULL;
2633 list_for_each_entry(mod, &modules, list) {
2634 if (mod->num_exentries == 0)
2637 e = search_extable(mod->extable,
2638 mod->extable + mod->num_exentries - 1,
2645 /* Now, if we found one, we are running inside it now, hence
2646 we cannot unload the module, hence no refcnt needed. */
2651 * Is this a valid module address?
2653 int is_module_address(unsigned long addr)
2659 list_for_each_entry(mod, &modules, list) {
2660 if (within(addr, mod->module_core, mod->core_size)) {
2672 /* Is this a valid kernel address? */
2673 struct module *__module_text_address(unsigned long addr)
2677 if (addr < module_addr_min || addr > module_addr_max)
2680 list_for_each_entry(mod, &modules, list)
2681 if (within(addr, mod->module_init, mod->init_text_size)
2682 || within(addr, mod->module_core, mod->core_text_size))
2687 struct module *module_text_address(unsigned long addr)
2692 mod = __module_text_address(addr);
2698 /* Don't grab lock, we're oopsing. */
2699 void print_modules(void)
2704 printk("Modules linked in:");
2705 list_for_each_entry(mod, &modules, list)
2706 printk(" %s%s", mod->name, module_flags(mod, buf));
2707 if (last_unloaded_module[0])
2708 printk(" [last unloaded: %s]", last_unloaded_module);
2712 #ifdef CONFIG_MODVERSIONS
2713 /* Generate the signature for struct module here, too, for modversions. */
2714 void struct_module(struct module *mod) { return; }
2715 EXPORT_SYMBOL(struct_module);
2718 #ifdef CONFIG_MARKERS
2719 void module_update_markers(void)
2723 mutex_lock(&module_mutex);
2724 list_for_each_entry(mod, &modules, list)
2726 marker_update_probe_range(mod->markers,
2727 mod->markers + mod->num_markers);
2728 mutex_unlock(&module_mutex);