Blame view
kernel/module.c
96.5 KB
f71d20e96 [PATCH] Add EXPOR... |
1 |
/* |
1da177e4c Linux-2.6.12-rc2 |
2 |
Copyright (C) 2002 Richard Henderson |
51f3d0f47 module: cleanup c... |
3 |
Copyright (C) 2001 Rusty Russell, 2002, 2010 Rusty Russell IBM. |
1da177e4c Linux-2.6.12-rc2 |
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
9984de1a5 kernel: Map most ... |
19 |
#include <linux/export.h> |
1da177e4c Linux-2.6.12-rc2 |
20 |
#include <linux/moduleloader.h> |
6d723736e tracing/events: a... |
21 |
#include <linux/ftrace_event.h> |
1da177e4c Linux-2.6.12-rc2 |
22 |
#include <linux/init.h> |
ae84e3247 Simplify module_g... |
23 |
#include <linux/kallsyms.h> |
34e1169d9 module: add sysca... |
24 |
#include <linux/file.h> |
3b5d5c6b0 proc: move /proc/... |
25 |
#include <linux/fs.h> |
6d7601338 Add /sys/module/n... |
26 |
#include <linux/sysfs.h> |
9f1583339 [PATCH] use add_t... |
27 |
#include <linux/kernel.h> |
1da177e4c Linux-2.6.12-rc2 |
28 29 30 |
#include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/elf.h> |
3b5d5c6b0 proc: move /proc/... |
31 |
#include <linux/proc_fs.h> |
2e72d51b4 security: introdu... |
32 |
#include <linux/security.h> |
1da177e4c Linux-2.6.12-rc2 |
33 34 35 36 |
#include <linux/seq_file.h> #include <linux/syscalls.h> #include <linux/fcntl.h> #include <linux/rcupdate.h> |
c59ede7b7 [PATCH] move capa... |
37 |
#include <linux/capability.h> |
1da177e4c Linux-2.6.12-rc2 |
38 39 40 41 42 43 |
#include <linux/cpu.h> #include <linux/moduleparam.h> #include <linux/errno.h> #include <linux/err.h> #include <linux/vermagic.h> #include <linux/notifier.h> |
f6a570333 [PATCH] severing ... |
44 |
#include <linux/sched.h> |
1da177e4c Linux-2.6.12-rc2 |
45 46 |
#include <linux/stop_machine.h> #include <linux/device.h> |
c988d2b28 [PATCH] modules: ... |
47 |
#include <linux/string.h> |
97d1f15b7 [PATCH] sem2mutex... |
48 |
#include <linux/mutex.h> |
d72b37513 Remove stop_machi... |
49 |
#include <linux/rculist.h> |
1da177e4c Linux-2.6.12-rc2 |
50 |
#include <asm/uaccess.h> |
1da177e4c Linux-2.6.12-rc2 |
51 |
#include <asm/cacheflush.h> |
eb8cdec4a nommu: add suppor... |
52 |
#include <asm/mmu_context.h> |
b817f6fef kbuild: check lic... |
53 |
#include <linux/license.h> |
6d7623943 modules: include ... |
54 |
#include <asm/sections.h> |
97e1c18e8 tracing: Kernel T... |
55 |
#include <linux/tracepoint.h> |
90d595fe5 ftrace: enable mc... |
56 |
#include <linux/ftrace.h> |
22a9d6456 async: Asynchrono... |
57 |
#include <linux/async.h> |
fbf59bc9d percpu: implement... |
58 |
#include <linux/percpu.h> |
4f2294b6d kmemleak: Add mod... |
59 |
#include <linux/kmemleak.h> |
bf5438fca jump label: Base ... |
60 |
#include <linux/jump_label.h> |
84e1c6bb3 x86: Add RO/NX pr... |
61 |
#include <linux/pfn.h> |
403ed2784 module: Use the b... |
62 |
#include <linux/bsearch.h> |
1d0059f3a MODSIGN: Add FIPS... |
63 |
#include <linux/fips.h> |
2f3238aeb module: add flags... |
64 |
#include <uapi/linux/module.h> |
106a4ee25 module: signature... |
65 |
#include "module-internal.h" |
1da177e4c Linux-2.6.12-rc2 |
66 |
|
7ead8b831 tracing/events: A... |
67 68 |
#define CREATE_TRACE_POINTS #include <trace/events/module.h> |
1da177e4c Linux-2.6.12-rc2 |
69 70 71 |
#ifndef ARCH_SHF_SMALL #define ARCH_SHF_SMALL 0 #endif |
84e1c6bb3 x86: Add RO/NX pr... |
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 |
/* * Modules' sections will be aligned on page boundaries * to ensure complete separation of code and data, but * only when CONFIG_DEBUG_SET_MODULE_RONX=y */ #ifdef CONFIG_DEBUG_SET_MODULE_RONX # define debug_align(X) ALIGN(X, PAGE_SIZE) #else # define debug_align(X) (X) #endif /* * Given BASE and SIZE this macro calculates the number of pages the * memory regions occupies */ #define MOD_NUMBER_OF_PAGES(BASE, SIZE) (((SIZE) > 0) ? \ (PFN_DOWN((unsigned long)(BASE) + (SIZE) - 1) - \ PFN_DOWN((unsigned long)BASE) + 1) \ : (0UL)) |
1da177e4c Linux-2.6.12-rc2 |
91 92 |
/* If this is set, the section belongs in the init part of the module */ #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) |
75676500f module: make lock... |
93 94 95 96 97 |
/* * Mutex protects: * 1) List of modules (also safely readable with preempt_disable), * 2) module_use links, * 3) module_addr_min/module_addr_max. |
d72b37513 Remove stop_machi... |
98 |
* (delete uses stop_machine/add uses RCU list operations). */ |
c6b378019 module: Export sy... |
99 100 |
DEFINE_MUTEX(module_mutex); EXPORT_SYMBOL_GPL(module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
101 |
static LIST_HEAD(modules); |
67fc4e0cb kdb: core for kgd... |
102 103 104 |
#ifdef CONFIG_KGDB_KDB struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */ #endif /* CONFIG_KGDB_KDB */ |
106a4ee25 module: signature... |
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 |
#ifdef CONFIG_MODULE_SIG #ifdef CONFIG_MODULE_SIG_FORCE static bool sig_enforce = true; #else static bool sig_enforce = false; static int param_set_bool_enable_only(const char *val, const struct kernel_param *kp) { int err; bool test; struct kernel_param dummy_kp = *kp; dummy_kp.arg = &test; err = param_set_bool(val, &dummy_kp); if (err) return err; /* Don't let them unset it once it's set! */ if (!test && sig_enforce) return -EROFS; if (test) sig_enforce = true; return 0; } static const struct kernel_param_ops param_ops_bool_enable_only = { |
0ce814096 module: Add NOARG... |
134 |
.flags = KERNEL_PARAM_FL_NOARG, |
106a4ee25 module: signature... |
135 136 137 138 139 140 141 142 |
.set = param_set_bool_enable_only, .get = param_get_bool, }; #define param_check_bool_enable_only param_check_bool module_param(sig_enforce, bool_enable_only, 0644); #endif /* !CONFIG_MODULE_SIG_FORCE */ #endif /* CONFIG_MODULE_SIG */ |
1da177e4c Linux-2.6.12-rc2 |
143 |
|
19e4529ee modules: Fix up b... |
144 145 |
/* Block module loading/unloading? */ int modules_disabled = 0; |
02608bef8 module: add kerne... |
146 |
core_param(nomodule, modules_disabled, bint, 0); |
19e4529ee modules: Fix up b... |
147 |
|
c9a3ba55b module: wait for ... |
148 149 |
/* Waiting for a module to finish initializing? */ static DECLARE_WAIT_QUEUE_HEAD(module_wq); |
e041c6834 [PATCH] Notifier ... |
150 |
static BLOCKING_NOTIFIER_HEAD(module_notify_list); |
1da177e4c Linux-2.6.12-rc2 |
151 |
|
75676500f module: make lock... |
152 153 |
/* Bounds of module allocation, for speeding __module_address. * Protected by module_mutex. */ |
3a642e99b modules: Take a s... |
154 |
static unsigned long module_addr_min = -1UL, module_addr_max = 0; |
1da177e4c Linux-2.6.12-rc2 |
155 156 |
int register_module_notifier(struct notifier_block * nb) { |
e041c6834 [PATCH] Notifier ... |
157 |
return blocking_notifier_chain_register(&module_notify_list, nb); |
1da177e4c Linux-2.6.12-rc2 |
158 159 160 161 162 |
} EXPORT_SYMBOL(register_module_notifier); int unregister_module_notifier(struct notifier_block * nb) { |
e041c6834 [PATCH] Notifier ... |
163 |
return blocking_notifier_chain_unregister(&module_notify_list, nb); |
1da177e4c Linux-2.6.12-rc2 |
164 165 |
} EXPORT_SYMBOL(unregister_module_notifier); |
eded41c1c module: kallsyms ... |
166 167 168 169 |
struct load_info { Elf_Ehdr *hdr; unsigned long len; Elf_Shdr *sechdrs; |
6526c534b module: move modu... |
170 |
char *secstrings, *strtab; |
d913188c7 module: layout_an... |
171 |
unsigned long symoffs, stroffs; |
811d66a0e module: group pos... |
172 173 |
struct _ddebug *debug; unsigned int num_debug; |
106a4ee25 module: signature... |
174 |
bool sig_ok; |
eded41c1c module: kallsyms ... |
175 176 177 178 |
struct { unsigned int sym, str, mod, vers, info, pcpu; } index; }; |
9a4b9708f module: fix and e... |
179 180 |
/* We require a truly strong try_module_get(): 0 means failure due to ongoing or failed initialization etc. */ |
1da177e4c Linux-2.6.12-rc2 |
181 182 |
static inline int strong_try_module_get(struct module *mod) { |
0d21b0e34 module: add new s... |
183 |
BUG_ON(mod && mod->state == MODULE_STATE_UNFORMED); |
1da177e4c Linux-2.6.12-rc2 |
184 |
if (mod && mod->state == MODULE_STATE_COMING) |
c9a3ba55b module: wait for ... |
185 186 |
return -EBUSY; if (try_module_get(mod)) |
1da177e4c Linux-2.6.12-rc2 |
187 |
return 0; |
c9a3ba55b module: wait for ... |
188 189 |
else return -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
190 |
} |
373d4d099 taint: add explic... |
191 192 |
static inline void add_taint_module(struct module *mod, unsigned flag, enum lockdep_ok lockdep_ok) |
fa3ba2e81 [PATCH] fix Modul... |
193 |
{ |
373d4d099 taint: add explic... |
194 |
add_taint(flag, lockdep_ok); |
25ddbb18a Make the taint fl... |
195 |
mod->taints |= (1U << flag); |
fa3ba2e81 [PATCH] fix Modul... |
196 |
} |
02a3e59a0 Fix minor typoes ... |
197 198 199 |
/* * A thread that wants to hold a reference to a module only while it * is running can call this to safely exit. nfsd and lockd use this. |
1da177e4c Linux-2.6.12-rc2 |
200 201 202 203 204 205 206 |
*/ void __module_put_and_exit(struct module *mod, long code) { module_put(mod); do_exit(code); } EXPORT_SYMBOL(__module_put_and_exit); |
22a8bdeb5 whitespace fixes:... |
207 |
|
1da177e4c Linux-2.6.12-rc2 |
208 |
/* Find a module section: 0 means not found. */ |
49668688d module: pass load... |
209 |
static unsigned int find_sec(const struct load_info *info, const char *name) |
1da177e4c Linux-2.6.12-rc2 |
210 211 |
{ unsigned int i; |
49668688d module: pass load... |
212 213 |
for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; |
1da177e4c Linux-2.6.12-rc2 |
214 |
/* Alloc bit cleared means "ignore it." */ |
49668688d module: pass load... |
215 216 |
if ((shdr->sh_flags & SHF_ALLOC) && strcmp(info->secstrings + shdr->sh_name, name) == 0) |
1da177e4c Linux-2.6.12-rc2 |
217 |
return i; |
49668688d module: pass load... |
218 |
} |
1da177e4c Linux-2.6.12-rc2 |
219 220 |
return 0; } |
5e458cc0f module: simplify ... |
221 |
/* Find a module section, or NULL. */ |
49668688d module: pass load... |
222 |
static void *section_addr(const struct load_info *info, const char *name) |
5e458cc0f module: simplify ... |
223 224 |
{ /* Section 0 has sh_addr 0. */ |
49668688d module: pass load... |
225 |
return (void *)info->sechdrs[find_sec(info, name)].sh_addr; |
5e458cc0f module: simplify ... |
226 227 228 |
} /* Find a module section, or NULL. Fill in number of "objects" in section. */ |
49668688d module: pass load... |
229 |
static void *section_objs(const struct load_info *info, |
5e458cc0f module: simplify ... |
230 231 232 233 |
const char *name, size_t object_size, unsigned int *num) { |
49668688d module: pass load... |
234 |
unsigned int sec = find_sec(info, name); |
5e458cc0f module: simplify ... |
235 236 |
/* Section 0 has sh_addr 0 and sh_size 0. */ |
49668688d module: pass load... |
237 238 |
*num = info->sechdrs[sec].sh_size / object_size; return (void *)info->sechdrs[sec].sh_addr; |
5e458cc0f module: simplify ... |
239 |
} |
1da177e4c Linux-2.6.12-rc2 |
240 241 242 243 244 |
/* Provided by the linker */ extern const struct kernel_symbol __start___ksymtab[]; extern const struct kernel_symbol __stop___ksymtab[]; extern const struct kernel_symbol __start___ksymtab_gpl[]; extern const struct kernel_symbol __stop___ksymtab_gpl[]; |
9f28bb7e1 [PATCH] add EXPOR... |
245 246 |
extern const struct kernel_symbol __start___ksymtab_gpl_future[]; extern const struct kernel_symbol __stop___ksymtab_gpl_future[]; |
1da177e4c Linux-2.6.12-rc2 |
247 248 |
extern const unsigned long __start___kcrctab[]; extern const unsigned long __start___kcrctab_gpl[]; |
9f28bb7e1 [PATCH] add EXPOR... |
249 |
extern const unsigned long __start___kcrctab_gpl_future[]; |
f7f5b6755 Shrink struct mod... |
250 251 252 253 254 |
#ifdef CONFIG_UNUSED_SYMBOLS extern const struct kernel_symbol __start___ksymtab_unused[]; extern const struct kernel_symbol __stop___ksymtab_unused[]; extern const struct kernel_symbol __start___ksymtab_unused_gpl[]; extern const struct kernel_symbol __stop___ksymtab_unused_gpl[]; |
f71d20e96 [PATCH] Add EXPOR... |
255 256 |
extern const unsigned long __start___kcrctab_unused[]; extern const unsigned long __start___kcrctab_unused_gpl[]; |
f7f5b6755 Shrink struct mod... |
257 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
258 259 260 261 |
#ifndef CONFIG_MODVERSIONS #define symversion(base, idx) NULL #else |
f83ca9fe3 [PATCH] symversio... |
262 |
#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL) |
1da177e4c Linux-2.6.12-rc2 |
263 |
#endif |
dafd0940c module: generic e... |
264 265 266 267 268 |
static bool each_symbol_in_section(const struct symsearch *arr, unsigned int arrsize, struct module *owner, bool (*fn)(const struct symsearch *syms, struct module *owner, |
de4d8d534 module: each_symb... |
269 |
void *data), |
dafd0940c module: generic e... |
270 |
void *data) |
ad9546c99 module: neaten __... |
271 |
{ |
de4d8d534 module: each_symb... |
272 |
unsigned int j; |
ad9546c99 module: neaten __... |
273 |
|
dafd0940c module: generic e... |
274 |
for (j = 0; j < arrsize; j++) { |
de4d8d534 module: each_symb... |
275 276 |
if (fn(&arr[j], owner, data)) return true; |
f71d20e96 [PATCH] Add EXPOR... |
277 |
} |
dafd0940c module: generic e... |
278 279 |
return false; |
ad9546c99 module: neaten __... |
280 |
} |
dafd0940c module: generic e... |
281 |
/* Returns true as soon as fn returns true, otherwise false. */ |
de4d8d534 module: each_symb... |
282 283 284 285 |
bool each_symbol_section(bool (*fn)(const struct symsearch *arr, struct module *owner, void *data), void *data) |
ad9546c99 module: neaten __... |
286 287 |
{ struct module *mod; |
44032e631 module: reduce st... |
288 |
static const struct symsearch arr[] = { |
ad9546c99 module: neaten __... |
289 |
{ __start___ksymtab, __stop___ksymtab, __start___kcrctab, |
dafd0940c module: generic e... |
290 |
NOT_GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
291 |
{ __start___ksymtab_gpl, __stop___ksymtab_gpl, |
dafd0940c module: generic e... |
292 293 |
__start___kcrctab_gpl, GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
294 |
{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future, |
dafd0940c module: generic e... |
295 296 |
__start___kcrctab_gpl_future, WILL_BE_GPL_ONLY, false }, |
f7f5b6755 Shrink struct mod... |
297 |
#ifdef CONFIG_UNUSED_SYMBOLS |
ad9546c99 module: neaten __... |
298 |
{ __start___ksymtab_unused, __stop___ksymtab_unused, |
dafd0940c module: generic e... |
299 300 |
__start___kcrctab_unused, NOT_GPL_ONLY, true }, |
ad9546c99 module: neaten __... |
301 |
{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl, |
dafd0940c module: generic e... |
302 303 |
__start___kcrctab_unused_gpl, GPL_ONLY, true }, |
f7f5b6755 Shrink struct mod... |
304 |
#endif |
ad9546c99 module: neaten __... |
305 |
}; |
f71d20e96 [PATCH] Add EXPOR... |
306 |
|
dafd0940c module: generic e... |
307 308 |
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data)) return true; |
f71d20e96 [PATCH] Add EXPOR... |
309 |
|
d72b37513 Remove stop_machi... |
310 |
list_for_each_entry_rcu(mod, &modules, list) { |
ad9546c99 module: neaten __... |
311 312 |
struct symsearch arr[] = { { mod->syms, mod->syms + mod->num_syms, mod->crcs, |
dafd0940c module: generic e... |
313 |
NOT_GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
314 |
{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms, |
dafd0940c module: generic e... |
315 316 |
mod->gpl_crcs, GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
317 318 |
{ mod->gpl_future_syms, mod->gpl_future_syms + mod->num_gpl_future_syms, |
dafd0940c module: generic e... |
319 320 |
mod->gpl_future_crcs, WILL_BE_GPL_ONLY, false }, |
f7f5b6755 Shrink struct mod... |
321 |
#ifdef CONFIG_UNUSED_SYMBOLS |
ad9546c99 module: neaten __... |
322 323 |
{ mod->unused_syms, mod->unused_syms + mod->num_unused_syms, |
dafd0940c module: generic e... |
324 325 |
mod->unused_crcs, NOT_GPL_ONLY, true }, |
ad9546c99 module: neaten __... |
326 327 |
{ mod->unused_gpl_syms, mod->unused_gpl_syms + mod->num_unused_gpl_syms, |
dafd0940c module: generic e... |
328 329 |
mod->unused_gpl_crcs, GPL_ONLY, true }, |
f7f5b6755 Shrink struct mod... |
330 |
#endif |
ad9546c99 module: neaten __... |
331 |
}; |
0d21b0e34 module: add new s... |
332 333 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
dafd0940c module: generic e... |
334 335 336 337 338 |
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data)) return true; } return false; } |
de4d8d534 module: each_symb... |
339 |
EXPORT_SYMBOL_GPL(each_symbol_section); |
dafd0940c module: generic e... |
340 341 342 343 344 345 346 347 348 349 |
struct find_symbol_arg { /* Input */ const char *name; bool gplok; bool warn; /* Output */ struct module *owner; const unsigned long *crc; |
414fd31b2 module: Make find... |
350 |
const struct kernel_symbol *sym; |
dafd0940c module: generic e... |
351 |
}; |
de4d8d534 module: each_symb... |
352 353 354 |
static bool check_symbol(const struct symsearch *syms, struct module *owner, unsigned int symnum, void *data) |
dafd0940c module: generic e... |
355 356 |
{ struct find_symbol_arg *fsa = data; |
dafd0940c module: generic e... |
357 358 359 360 |
if (!fsa->gplok) { if (syms->licence == GPL_ONLY) return false; if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) { |
bddb12b32 kernel/module.c: ... |
361 362 363 364 |
pr_warn("Symbol %s is being used by a non-GPL module, " "which will not be allowed in the future ", fsa->name); |
9f28bb7e1 [PATCH] add EXPOR... |
365 |
} |
1da177e4c Linux-2.6.12-rc2 |
366 |
} |
ad9546c99 module: neaten __... |
367 |
|
f7f5b6755 Shrink struct mod... |
368 |
#ifdef CONFIG_UNUSED_SYMBOLS |
dafd0940c module: generic e... |
369 |
if (syms->unused && fsa->warn) { |
bddb12b32 kernel/module.c: ... |
370 371 372 373 374 375 376 377 378 379 |
pr_warn("Symbol %s is marked as UNUSED, however this module is " "using it. ", fsa->name); pr_warn("This symbol will go away in the future. "); pr_warn("Please evalute if this is the right api to use and if " "it really is, submit a report the linux kernel " "mailinglist together with submitting your code for " "inclusion. "); |
dafd0940c module: generic e... |
380 |
} |
f7f5b6755 Shrink struct mod... |
381 |
#endif |
dafd0940c module: generic e... |
382 383 384 |
fsa->owner = owner; fsa->crc = symversion(syms->crcs, symnum); |
414fd31b2 module: Make find... |
385 |
fsa->sym = &syms->start[symnum]; |
dafd0940c module: generic e... |
386 387 |
return true; } |
403ed2784 module: Use the b... |
388 389 390 391 392 393 394 |
static int cmp_name(const void *va, const void *vb) { const char *a; const struct kernel_symbol *b; a = va; b = vb; return strcmp(a, b->name); } |
de4d8d534 module: each_symb... |
395 396 397 398 399 |
static bool find_symbol_in_section(const struct symsearch *syms, struct module *owner, void *data) { struct find_symbol_arg *fsa = data; |
403ed2784 module: Use the b... |
400 401 402 403 404 405 406 |
struct kernel_symbol *sym; sym = bsearch(fsa->name, syms->start, syms->stop - syms->start, sizeof(struct kernel_symbol), cmp_name); if (sym != NULL && check_symbol(syms, owner, sym - syms->start, data)) return true; |
de4d8d534 module: each_symb... |
407 |
|
de4d8d534 module: each_symb... |
408 409 |
return false; } |
414fd31b2 module: Make find... |
410 |
/* Find a symbol and return it, along with, (optional) crc and |
75676500f module: make lock... |
411 |
* (optional) module which owns it. Needs preempt disabled or module_mutex. */ |
c6b378019 module: Export sy... |
412 413 414 415 416 |
const struct kernel_symbol *find_symbol(const char *name, struct module **owner, const unsigned long **crc, bool gplok, bool warn) |
dafd0940c module: generic e... |
417 418 419 420 421 422 |
{ struct find_symbol_arg fsa; fsa.name = name; fsa.gplok = gplok; fsa.warn = warn; |
de4d8d534 module: each_symb... |
423 |
if (each_symbol_section(find_symbol_in_section, &fsa)) { |
dafd0940c module: generic e... |
424 425 426 427 |
if (owner) *owner = fsa.owner; if (crc) *crc = fsa.crc; |
414fd31b2 module: Make find... |
428 |
return fsa.sym; |
dafd0940c module: generic e... |
429 |
} |
5e1241692 module: replace D... |
430 431 |
pr_debug("Failed to find symbol %s ", name); |
414fd31b2 module: Make find... |
432 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
433 |
} |
c6b378019 module: Export sy... |
434 |
EXPORT_SYMBOL_GPL(find_symbol); |
1da177e4c Linux-2.6.12-rc2 |
435 |
|
1da177e4c Linux-2.6.12-rc2 |
436 |
/* Search for module by name: must hold module_mutex. */ |
4f6de4d51 module: don't mod... |
437 |
static struct module *find_module_all(const char *name, size_t len, |
0d21b0e34 module: add new s... |
438 |
bool even_unformed) |
1da177e4c Linux-2.6.12-rc2 |
439 440 441 442 |
{ struct module *mod; list_for_each_entry(mod, &modules, list) { |
0d21b0e34 module: add new s... |
443 444 |
if (!even_unformed && mod->state == MODULE_STATE_UNFORMED) continue; |
4f6de4d51 module: don't mod... |
445 |
if (strlen(mod->name) == len && !memcmp(mod->name, name, len)) |
1da177e4c Linux-2.6.12-rc2 |
446 447 448 449 |
return mod; } return NULL; } |
0d21b0e34 module: add new s... |
450 451 452 |
struct module *find_module(const char *name) { |
4f6de4d51 module: don't mod... |
453 |
return find_module_all(name, strlen(name), false); |
0d21b0e34 module: add new s... |
454 |
} |
c6b378019 module: Export sy... |
455 |
EXPORT_SYMBOL_GPL(find_module); |
1da177e4c Linux-2.6.12-rc2 |
456 457 |
#ifdef CONFIG_SMP |
fbf59bc9d percpu: implement... |
458 |
|
259354dea module: encapsula... |
459 |
static inline void __percpu *mod_percpu(struct module *mod) |
fbf59bc9d percpu: implement... |
460 |
{ |
259354dea module: encapsula... |
461 462 |
return mod->percpu; } |
fbf59bc9d percpu: implement... |
463 |
|
9eb76d779 module: cleanup c... |
464 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
465 |
{ |
9eb76d779 module: cleanup c... |
466 467 468 469 470 |
Elf_Shdr *pcpusec = &info->sechdrs[info->index.pcpu]; unsigned long align = pcpusec->sh_addralign; if (!pcpusec->sh_size) return 0; |
fbf59bc9d percpu: implement... |
471 |
if (align > PAGE_SIZE) { |
bddb12b32 kernel/module.c: ... |
472 473 474 |
pr_warn("%s: per-cpu alignment %li > %li ", mod->name, align, PAGE_SIZE); |
fbf59bc9d percpu: implement... |
475 476 |
align = PAGE_SIZE; } |
9eb76d779 module: cleanup c... |
477 |
mod->percpu = __alloc_reserved_percpu(pcpusec->sh_size, align); |
259354dea module: encapsula... |
478 |
if (!mod->percpu) { |
bddb12b32 kernel/module.c: ... |
479 480 481 |
pr_warn("%s: Could not allocate %lu bytes percpu data ", mod->name, (unsigned long)pcpusec->sh_size); |
259354dea module: encapsula... |
482 483 |
return -ENOMEM; } |
9eb76d779 module: cleanup c... |
484 |
mod->percpu_size = pcpusec->sh_size; |
259354dea module: encapsula... |
485 |
return 0; |
fbf59bc9d percpu: implement... |
486 |
} |
259354dea module: encapsula... |
487 |
static void percpu_modfree(struct module *mod) |
fbf59bc9d percpu: implement... |
488 |
{ |
259354dea module: encapsula... |
489 |
free_percpu(mod->percpu); |
fbf59bc9d percpu: implement... |
490 |
} |
49668688d module: pass load... |
491 |
static unsigned int find_pcpusec(struct load_info *info) |
6b588c18f module: reorder m... |
492 |
{ |
49668688d module: pass load... |
493 |
return find_sec(info, ".data..percpu"); |
6b588c18f module: reorder m... |
494 |
} |
259354dea module: encapsula... |
495 496 |
static void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
6b588c18f module: reorder m... |
497 498 499 500 |
{ int cpu; for_each_possible_cpu(cpu) |
259354dea module: encapsula... |
501 |
memcpy(per_cpu_ptr(mod->percpu, cpu), from, size); |
6b588c18f module: reorder m... |
502 |
} |
10fad5e46 percpu, module: i... |
503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 |
/** * is_module_percpu_address - test whether address is from module static percpu * @addr: address to test * * Test whether @addr belongs to module static percpu area. * * RETURNS: * %true if @addr is from module static percpu area */ bool is_module_percpu_address(unsigned long addr) { struct module *mod; unsigned int cpu; preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
520 521 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
10fad5e46 percpu, module: i... |
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 |
if (!mod->percpu_size) continue; for_each_possible_cpu(cpu) { void *start = per_cpu_ptr(mod->percpu, cpu); if ((void *)addr >= start && (void *)addr < start + mod->percpu_size) { preempt_enable(); return true; } } } preempt_enable(); return false; |
6b588c18f module: reorder m... |
537 |
} |
1da177e4c Linux-2.6.12-rc2 |
538 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
539 |
|
259354dea module: encapsula... |
540 |
static inline void __percpu *mod_percpu(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
541 542 543 |
{ return NULL; } |
9eb76d779 module: cleanup c... |
544 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
545 |
{ |
9eb76d779 module: cleanup c... |
546 547 548 549 |
/* UP modules shouldn't have this section: ENOMEM isn't quite right */ if (info->sechdrs[info->index.pcpu].sh_size != 0) return -ENOMEM; return 0; |
259354dea module: encapsula... |
550 551 |
} static inline void percpu_modfree(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
552 |
{ |
1da177e4c Linux-2.6.12-rc2 |
553 |
} |
49668688d module: pass load... |
554 |
static unsigned int find_pcpusec(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
555 556 557 |
{ return 0; } |
259354dea module: encapsula... |
558 559 |
static inline void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
560 561 562 563 |
{ /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
10fad5e46 percpu, module: i... |
564 565 566 567 |
bool is_module_percpu_address(unsigned long addr) { return false; } |
6b588c18f module: reorder m... |
568 |
|
1da177e4c Linux-2.6.12-rc2 |
569 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
570 571 572 573 574 575 |
#define MODINFO_ATTR(field) \ static void setup_modinfo_##field(struct module *mod, const char *s) \ { \ mod->field = kstrdup(s, GFP_KERNEL); \ } \ static ssize_t show_modinfo_##field(struct module_attribute *mattr, \ |
4befb026c module: change at... |
576 |
struct module_kobject *mk, char *buffer) \ |
c988d2b28 [PATCH] modules: ... |
577 |
{ \ |
cc56ded3f kernel/module.c: ... |
578 579 |
return scnprintf(buffer, PAGE_SIZE, "%s ", mk->mod->field); \ |
c988d2b28 [PATCH] modules: ... |
580 581 582 583 584 585 586 |
} \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
22a8bdeb5 whitespace fixes:... |
587 588 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
589 590 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
591 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
592 593 594 595 596 597 598 599 |
.show = show_modinfo_##field, \ .setup = setup_modinfo_##field, \ .test = modinfo_##field##_exists, \ .free = free_modinfo_##field, \ }; MODINFO_ATTR(version); MODINFO_ATTR(srcversion); |
e14af7eeb debug: track and ... |
600 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
601 |
#ifdef CONFIG_MODULE_UNLOAD |
eb0c53771 tracing: Fix comp... |
602 603 |
EXPORT_TRACEPOINT_SYMBOL(module_get); |
1da177e4c Linux-2.6.12-rc2 |
604 |
/* Init the unload section of the module. */ |
9f85a4bbb module: refactor ... |
605 |
static int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
606 |
{ |
9f85a4bbb module: refactor ... |
607 608 609 |
mod->refptr = alloc_percpu(struct module_ref); if (!mod->refptr) return -ENOMEM; |
2c02dfe7f module: Make the ... |
610 611 |
INIT_LIST_HEAD(&mod->source_list); INIT_LIST_HEAD(&mod->target_list); |
e1783a240 module: Use this_... |
612 |
|
1da177e4c Linux-2.6.12-rc2 |
613 |
/* Hold reference count during initialization. */ |
08f141d3d modules: use raw_... |
614 |
raw_cpu_write(mod->refptr->incs, 1); |
9f85a4bbb module: refactor ... |
615 616 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
617 |
} |
1da177e4c Linux-2.6.12-rc2 |
618 619 620 621 |
/* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; |
2c02dfe7f module: Make the ... |
622 623 |
list_for_each_entry(use, &b->source_list, source_list) { if (use->source == a) { |
5e1241692 module: replace D... |
624 625 |
pr_debug("%s uses %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
626 627 628 |
return 1; } } |
5e1241692 module: replace D... |
629 630 |
pr_debug("%s does not use %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
631 632 |
return 0; } |
2c02dfe7f module: Make the ... |
633 634 635 636 637 638 639 640 641 |
/* * Module a uses b * - we add 'a' as a "source", 'b' as a "target" of module use * - the module_use is added to the list of 'b' sources (so * 'b' can walk the list to see who sourced them), and of 'a' * targets (so 'a' can see what modules it targets). */ static int add_module_usage(struct module *a, struct module *b) { |
2c02dfe7f module: Make the ... |
642 |
struct module_use *use; |
5e1241692 module: replace D... |
643 644 |
pr_debug("Allocating new usage for %s. ", a->name); |
2c02dfe7f module: Make the ... |
645 646 |
use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { |
bddb12b32 kernel/module.c: ... |
647 648 |
pr_warn("%s: out of memory loading ", a->name); |
2c02dfe7f module: Make the ... |
649 650 651 652 653 654 655 |
return -ENOMEM; } use->source = a; use->target = b; list_add(&use->source_list, &b->source_list); list_add(&use->target_list, &a->target_list); |
2c02dfe7f module: Make the ... |
656 657 |
return 0; } |
75676500f module: make lock... |
658 |
/* Module a uses b: caller needs module_mutex() */ |
9bea7f239 module: fix bne2 ... |
659 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
660 |
{ |
c8e21ced0 module: fix kdb's... |
661 |
int err; |
270a6c4ca /sys/modules/*/ho... |
662 |
|
9bea7f239 module: fix bne2 ... |
663 |
if (b == NULL || already_uses(a, b)) |
218ce7351 Revert "module: d... |
664 |
return 0; |
218ce7351 Revert "module: d... |
665 |
|
9bea7f239 module: fix bne2 ... |
666 667 |
/* If module isn't available, we fail. */ err = strong_try_module_get(b); |
c9a3ba55b module: wait for ... |
668 |
if (err) |
9bea7f239 module: fix bne2 ... |
669 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
670 |
|
2c02dfe7f module: Make the ... |
671 672 |
err = add_module_usage(a, b); if (err) { |
1da177e4c Linux-2.6.12-rc2 |
673 |
module_put(b); |
9bea7f239 module: fix bne2 ... |
674 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
675 |
} |
9bea7f239 module: fix bne2 ... |
676 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
677 |
} |
9bea7f239 module: fix bne2 ... |
678 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
679 680 681 682 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { |
2c02dfe7f module: Make the ... |
683 |
struct module_use *use, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
684 |
|
75676500f module: make lock... |
685 |
mutex_lock(&module_mutex); |
2c02dfe7f module: Make the ... |
686 687 |
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) { struct module *i = use->target; |
5e1241692 module: replace D... |
688 689 |
pr_debug("%s unusing %s ", mod->name, i->name); |
2c02dfe7f module: Make the ... |
690 691 692 693 |
module_put(i); list_del(&use->source_list); list_del(&use->target_list); kfree(use); |
1da177e4c Linux-2.6.12-rc2 |
694 |
} |
75676500f module: make lock... |
695 |
mutex_unlock(&module_mutex); |
9f85a4bbb module: refactor ... |
696 697 |
free_percpu(mod->refptr); |
1da177e4c Linux-2.6.12-rc2 |
698 699 700 |
} #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
701 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
702 703 704 |
{ int ret = (flags & O_TRUNC); if (ret) |
373d4d099 taint: add explic... |
705 |
add_taint(TAINT_FORCED_RMMOD, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
706 707 708 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
709 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 |
{ return 0; } #endif /* CONFIG_MODULE_FORCE_UNLOAD */ struct stopref { struct module *mod; int flags; int *forced; }; /* Whole machine is stopped with interrupts off when this runs. */ static int __try_stop_module(void *_sref) { struct stopref *sref = _sref; |
da39ba5e1 module: don't use... |
726 727 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
728 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
729 730 731 732 733 734 735 736 737 738 |
return -EWOULDBLOCK; } /* Mark it as dying. */ sref->mod->state = MODULE_STATE_GOING; return 0; } static int try_stop_module(struct module *mod, int flags, int *forced) { |
3f2b9c9cd module: remove rm... |
739 |
struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
740 |
|
3f2b9c9cd module: remove rm... |
741 |
return stop_machine(__try_stop_module, &sref, NULL); |
1da177e4c Linux-2.6.12-rc2 |
742 |
} |
bd77c0477 module: struct mo... |
743 |
unsigned long module_refcount(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
744 |
{ |
bd77c0477 module: struct mo... |
745 |
unsigned long incs = 0, decs = 0; |
720eba31f modules: Use a be... |
746 |
int cpu; |
1da177e4c Linux-2.6.12-rc2 |
747 |
|
720eba31f modules: Use a be... |
748 |
for_each_possible_cpu(cpu) |
5fbfb18d7 Fix up possibly r... |
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 |
decs += per_cpu_ptr(mod->refptr, cpu)->decs; /* * ensure the incs are added up after the decs. * module_put ensures incs are visible before decs with smp_wmb. * * This 2-count scheme avoids the situation where the refcount * for CPU0 is read, then CPU0 increments the module refcount, * then CPU1 drops that refcount, then the refcount for CPU1 is * read. We would record a decrement but not its corresponding * increment so we would see a low count (disaster). * * Rare situation? But module_refcount can be preempted, and we * might be tallying up 4096+ CPUs. So it is not impossible. */ smp_rmb(); for_each_possible_cpu(cpu) incs += per_cpu_ptr(mod->refptr, cpu)->incs; return incs - decs; |
1da177e4c Linux-2.6.12-rc2 |
767 768 769 770 771 |
} EXPORT_SYMBOL(module_refcount); /* This exists whether we can unload or not */ static void free_module(struct module *mod); |
17da2bd90 [CVE-2009-0029] S... |
772 773 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
774 775 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
776 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
777 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
778 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
779 780 781 782 783 |
return -EPERM; if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) return -EFAULT; name[MODULE_NAME_LEN-1] = '\0'; |
22e669568 module: Add missi... |
784 785 786 |
if (!(flags & O_NONBLOCK)) pr_warn("waiting module removal not supported: please upgrade "); |
3f2b9c9cd module: remove rm... |
787 |
|
3fc1f1e27 stop_machine: rei... |
788 789 |
if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; |
1da177e4c Linux-2.6.12-rc2 |
790 791 792 793 794 795 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } |
2c02dfe7f module: Make the ... |
796 |
if (!list_empty(&mod->source_list)) { |
1da177e4c Linux-2.6.12-rc2 |
797 798 799 800 801 802 803 |
/* Other modules depend on us: get rid of them first. */ ret = -EWOULDBLOCK; goto out; } /* Doing init or already dying? */ if (mod->state != MODULE_STATE_LIVE) { |
3f2b9c9cd module: remove rm... |
804 |
/* FIXME: if (force), slam module count damn the torpedoes */ |
5e1241692 module: replace D... |
805 806 |
pr_debug("%s already dying ", mod->name); |
1da177e4c Linux-2.6.12-rc2 |
807 808 809 810 811 |
ret = -EBUSY; goto out; } /* If it has an init func, it must have an exit func to unload */ |
af49d9248 Remove "unsafe" f... |
812 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
813 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
814 815 816 817 818 819 |
if (!forced) { /* This module can't be removed */ ret = -EBUSY; goto out; } } |
1da177e4c Linux-2.6.12-rc2 |
820 821 822 823 |
/* Stop the machine so refcounts can't move and disable module. */ ret = try_stop_module(mod, flags, &forced); if (ret != 0) goto out; |
df4b565e1 module: add MODUL... |
824 |
mutex_unlock(&module_mutex); |
25985edce Fix common misspe... |
825 |
/* Final destruction now no one is using it. */ |
df4b565e1 module: add MODUL... |
826 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
827 |
mod->exit(); |
df4b565e1 module: add MODUL... |
828 829 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
830 |
async_synchronize_full(); |
75676500f module: make lock... |
831 |
|
e14af7eeb debug: track and ... |
832 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
833 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
1da177e4c Linux-2.6.12-rc2 |
834 |
|
75676500f module: make lock... |
835 836 837 |
free_module(mod); return 0; out: |
6389a3851 [PATCH] kernel/mo... |
838 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
839 840 |
return ret; } |
d1e99d7ae module: fix warni... |
841 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
842 843 844 |
{ struct module_use *use; int printed_something = 0; |
bd77c0477 module: struct mo... |
845 |
seq_printf(m, " %lu ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
846 847 848 |
/* Always include a trailing , so userspace can differentiate between this and the old multi-field proc format. */ |
2c02dfe7f module: Make the ... |
849 |
list_for_each_entry(use, &mod->source_list, source_list) { |
1da177e4c Linux-2.6.12-rc2 |
850 |
printed_something = 1; |
2c02dfe7f module: Make the ... |
851 |
seq_printf(m, "%s,", use->source->name); |
1da177e4c Linux-2.6.12-rc2 |
852 |
} |
1da177e4c Linux-2.6.12-rc2 |
853 854 855 856 857 858 859 860 861 862 863 864 |
if (mod->init != NULL && mod->exit == NULL) { printed_something = 1; seq_printf(m, "[permanent],"); } if (!printed_something) seq_printf(m, "-"); } void __symbol_put(const char *symbol) { struct module *owner; |
1da177e4c Linux-2.6.12-rc2 |
865 |
|
24da1cbff modules: remove m... |
866 |
preempt_disable(); |
414fd31b2 module: Make find... |
867 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
868 869 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
870 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
871 872 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
873 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
874 875 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
876 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
877 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
878 |
|
7d1d16e41 module: fix BUG_O... |
879 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
880 |
return; |
1da177e4c Linux-2.6.12-rc2 |
881 |
|
a6e6abd57 module: remove mo... |
882 883 |
/* module_text_address is safe here: we're supposed to have reference * to module from symbol_get, so it can't go away. */ |
7d1d16e41 module: fix BUG_O... |
884 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
885 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
886 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
887 888 889 890 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, |
4befb026c module: change at... |
891 |
struct module_kobject *mk, char *buffer) |
1da177e4c Linux-2.6.12-rc2 |
892 |
{ |
bd77c0477 module: struct mo... |
893 894 |
return sprintf(buffer, "%lu ", module_refcount(mk->mod)); |
1da177e4c Linux-2.6.12-rc2 |
895 |
} |
cca3e7073 modules: sysfs - ... |
896 897 |
static struct module_attribute modinfo_refcnt = __ATTR(refcnt, 0444, show_refcnt, NULL); |
1da177e4c Linux-2.6.12-rc2 |
898 |
|
d53799be6 module: move __mo... |
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
void __module_get(struct module *module) { if (module) { preempt_disable(); __this_cpu_inc(module->refptr->incs); trace_module_get(module, _RET_IP_); preempt_enable(); } } EXPORT_SYMBOL(__module_get); bool try_module_get(struct module *module) { bool ret = true; if (module) { preempt_disable(); if (likely(module_is_live(module))) { __this_cpu_inc(module->refptr->incs); trace_module_get(module, _RET_IP_); } else ret = false; preempt_enable(); } return ret; } EXPORT_SYMBOL(try_module_get); |
f6a570333 [PATCH] severing ... |
928 929 930 |
void module_put(struct module *module) { if (module) { |
e1783a240 module: Use this_... |
931 |
preempt_disable(); |
5fbfb18d7 Fix up possibly r... |
932 933 |
smp_wmb(); /* see comment in module_refcount */ __this_cpu_inc(module->refptr->decs); |
e1783a240 module: Use this_... |
934 |
|
ae832d1e0 tracing: Remove s... |
935 |
trace_module_put(module, _RET_IP_); |
e1783a240 module: Use this_... |
936 |
preempt_enable(); |
f6a570333 [PATCH] severing ... |
937 938 939 |
} } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
940 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
941 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
942 943 944 945 946 947 948 949 |
{ /* We don't know the usage count, or what modules are using. */ seq_printf(m, " - -"); } static inline void module_unload_free(struct module *mod) { } |
9bea7f239 module: fix bne2 ... |
950 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
951 |
{ |
9bea7f239 module: fix bne2 ... |
952 |
return strong_try_module_get(b); |
1da177e4c Linux-2.6.12-rc2 |
953 |
} |
9bea7f239 module: fix bne2 ... |
954 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
955 |
|
9f85a4bbb module: refactor ... |
956 |
static inline int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
957 |
{ |
9f85a4bbb module: refactor ... |
958 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
959 960 |
} #endif /* CONFIG_MODULE_UNLOAD */ |
53999bf34 error: implicit d... |
961 962 963 964 965 966 967 968 969 970 971 972 |
static size_t module_flags_taint(struct module *mod, char *buf) { size_t l = 0; if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE)) buf[l++] = 'P'; if (mod->taints & (1 << TAINT_OOT_MODULE)) buf[l++] = 'O'; if (mod->taints & (1 << TAINT_FORCED_MODULE)) buf[l++] = 'F'; if (mod->taints & (1 << TAINT_CRAP)) buf[l++] = 'C'; |
66cc69e34 Fix: module signa... |
973 |
if (mod->taints & (1 << TAINT_UNSIGNED_MODULE)) |
57673c2b0 Use 'E' instead o... |
974 |
buf[l++] = 'E'; |
53999bf34 error: implicit d... |
975 976 |
/* * TAINT_FORCED_RMMOD: could be added. |
8c90487cd Rename TAINT_UNSA... |
977 |
* TAINT_CPU_OUT_OF_SPEC, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't |
53999bf34 error: implicit d... |
978 979 980 981 |
* apply to modules. */ return l; } |
1f71740ab Driver core: show... |
982 |
static ssize_t show_initstate(struct module_attribute *mattr, |
4befb026c module: change at... |
983 |
struct module_kobject *mk, char *buffer) |
1f71740ab Driver core: show... |
984 985 |
{ const char *state = "unknown"; |
4befb026c module: change at... |
986 |
switch (mk->mod->state) { |
1f71740ab Driver core: show... |
987 988 989 990 991 992 993 994 995 |
case MODULE_STATE_LIVE: state = "live"; break; case MODULE_STATE_COMING: state = "coming"; break; case MODULE_STATE_GOING: state = "going"; break; |
0d21b0e34 module: add new s... |
996 997 |
default: BUG(); |
1f71740ab Driver core: show... |
998 999 1000 1001 |
} return sprintf(buffer, "%s ", state); } |
cca3e7073 modules: sysfs - ... |
1002 1003 |
static struct module_attribute modinfo_initstate = __ATTR(initstate, 0444, show_initstate, NULL); |
1f71740ab Driver core: show... |
1004 |
|
88bfa3247 module: add /sys/... |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 |
static ssize_t store_uevent(struct module_attribute *mattr, struct module_kobject *mk, const char *buffer, size_t count) { enum kobject_action action; if (kobject_action_type(buffer, count, &action) == 0) kobject_uevent(&mk->kobj, action); return count; } |
cca3e7073 modules: sysfs - ... |
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 |
struct module_attribute module_uevent = __ATTR(uevent, 0200, NULL, store_uevent); static ssize_t show_coresize(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { return sprintf(buffer, "%u ", mk->mod->core_size); } static struct module_attribute modinfo_coresize = __ATTR(coresize, 0444, show_coresize, NULL); static ssize_t show_initsize(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { return sprintf(buffer, "%u ", mk->mod->init_size); } static struct module_attribute modinfo_initsize = __ATTR(initsize, 0444, show_initsize, NULL); static ssize_t show_taint(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { size_t l; l = module_flags_taint(mk->mod, buffer); buffer[l++] = ' '; return l; } static struct module_attribute modinfo_taint = __ATTR(taint, 0444, show_taint, NULL); |
88bfa3247 module: add /sys/... |
1051 |
|
03e88ae1b [PATCH] fix modul... |
1052 |
static struct module_attribute *modinfo_attrs[] = { |
cca3e7073 modules: sysfs - ... |
1053 |
&module_uevent, |
03e88ae1b [PATCH] fix modul... |
1054 1055 |
&modinfo_version, &modinfo_srcversion, |
cca3e7073 modules: sysfs - ... |
1056 1057 1058 1059 |
&modinfo_initstate, &modinfo_coresize, &modinfo_initsize, &modinfo_taint, |
03e88ae1b [PATCH] fix modul... |
1060 |
#ifdef CONFIG_MODULE_UNLOAD |
cca3e7073 modules: sysfs - ... |
1061 |
&modinfo_refcnt, |
03e88ae1b [PATCH] fix modul... |
1062 1063 1064 |
#endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
1065 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
1066 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
1067 1068 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
1069 |
if (!test_taint(TAINT_FORCED_MODULE)) |
bddb12b32 kernel/module.c: ... |
1070 1071 |
pr_warn("%s: %s: kernel tainted. ", mod->name, reason); |
373d4d099 taint: add explic... |
1072 |
add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE); |
826e4506a Make forced modul... |
1073 1074 1075 1076 1077 |
return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
1078 |
#ifdef CONFIG_MODVERSIONS |
d4703aefd module: handle pp... |
1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 |
/* If the arch applies (non-zero) relocations to kernel kcrctab, unapply it. */ static unsigned long maybe_relocated(unsigned long crc, const struct module *crc_owner) { #ifdef ARCH_RELOCATES_KCRCTAB if (crc_owner == NULL) return crc - (unsigned long)reloc_start; #endif return crc; } |
1da177e4c Linux-2.6.12-rc2 |
1089 1090 1091 1092 |
static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
1093 1094 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1095 1096 1097 1098 1099 1100 1101 |
{ unsigned int i, num_versions; struct modversion_info *versions; /* Exporting module didn't supply crcs? OK, we're already tainted. */ if (!crc) return 1; |
a5dd69707 module: be more p... |
1102 1103 1104 |
/* No versions at all? modprobe --force does this. */ if (versindex == 0) return try_to_force_load(mod, symname) == 0; |
1da177e4c Linux-2.6.12-rc2 |
1105 1106 1107 1108 1109 1110 1111 |
versions = (void *) sechdrs[versindex].sh_addr; num_versions = sechdrs[versindex].sh_size / sizeof(struct modversion_info); for (i = 0; i < num_versions; i++) { if (strcmp(versions[i].name, symname) != 0) continue; |
d4703aefd module: handle pp... |
1112 |
if (versions[i].crc == maybe_relocated(*crc, crc_owner)) |
1da177e4c Linux-2.6.12-rc2 |
1113 |
return 1; |
5e1241692 module: replace D... |
1114 1115 |
pr_debug("Found checksum %lX vs module %lX ", |
d4703aefd module: handle pp... |
1116 |
maybe_relocated(*crc, crc_owner), versions[i].crc); |
826e4506a Make forced modul... |
1117 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1118 |
} |
826e4506a Make forced modul... |
1119 |
|
bddb12b32 kernel/module.c: ... |
1120 1121 |
pr_warn("%s: no symbol version for %s ", mod->name, symname); |
a5dd69707 module: be more p... |
1122 |
return 0; |
826e4506a Make forced modul... |
1123 1124 1125 1126 1127 1128 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
1129 1130 1131 1132 1133 1134 1135 |
} static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { const unsigned long *crc; |
1da177e4c Linux-2.6.12-rc2 |
1136 |
|
75676500f module: make lock... |
1137 1138 |
/* Since this should be found in kernel (which can't be removed), * no locking is necessary. */ |
b92021b09 CONFIG_SYMBOL_PRE... |
1139 |
if (!find_symbol(VMLINUX_SYMBOL_STR(module_layout), NULL, |
6560dc160 module: use MODUL... |
1140 |
&crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1141 |
BUG(); |
a4b6a77b7 module: fix symbo... |
1142 1143 |
return check_version(sechdrs, versindex, VMLINUX_SYMBOL_STR(module_layout), mod, crc, |
d4703aefd module: handle pp... |
1144 |
NULL); |
1da177e4c Linux-2.6.12-rc2 |
1145 |
} |
91e37a793 module: don't ign... |
1146 1147 1148 |
/* First part is kernel version, which we ignore if module has crcs. */ static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1149 |
{ |
91e37a793 module: don't ign... |
1150 1151 1152 1153 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1154 1155 1156 1157 1158 1159 1160 |
return strcmp(amagic, bmagic) == 0; } #else static inline int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
1161 1162 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 |
{ return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1173 1174 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1175 1176 1177 1178 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ |
75676500f module: make lock... |
1179 |
/* Resolve a symbol for this module. I.e. if we find one, record usage. */ |
49668688d module: pass load... |
1180 1181 |
static const struct kernel_symbol *resolve_symbol(struct module *mod, const struct load_info *info, |
414fd31b2 module: Make find... |
1182 |
const char *name, |
9bea7f239 module: fix bne2 ... |
1183 |
char ownername[]) |
1da177e4c Linux-2.6.12-rc2 |
1184 1185 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1186 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1187 |
const unsigned long *crc; |
9bea7f239 module: fix bne2 ... |
1188 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
1189 |
|
75676500f module: make lock... |
1190 |
mutex_lock(&module_mutex); |
414fd31b2 module: Make find... |
1191 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1192 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
9bea7f239 module: fix bne2 ... |
1193 1194 |
if (!sym) goto unlock; |
49668688d module: pass load... |
1195 1196 |
if (!check_version(info->sechdrs, info->index.vers, name, mod, crc, owner)) { |
9bea7f239 module: fix bne2 ... |
1197 1198 |
sym = ERR_PTR(-EINVAL); goto getname; |
1da177e4c Linux-2.6.12-rc2 |
1199 |
} |
9bea7f239 module: fix bne2 ... |
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 |
err = ref_module(mod, owner); if (err) { sym = ERR_PTR(err); goto getname; } getname: /* We must make copy under the lock if we failed to get ref. */ strncpy(ownername, module_name(owner), MODULE_NAME_LEN); unlock: |
75676500f module: make lock... |
1211 |
mutex_unlock(&module_mutex); |
218ce7351 Revert "module: d... |
1212 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1213 |
} |
49668688d module: pass load... |
1214 1215 1216 1217 |
static const struct kernel_symbol * resolve_symbol_wait(struct module *mod, const struct load_info *info, const char *name) |
9bea7f239 module: fix bne2 ... |
1218 1219 |
{ const struct kernel_symbol *ksym; |
49668688d module: pass load... |
1220 |
char owner[MODULE_NAME_LEN]; |
9bea7f239 module: fix bne2 ... |
1221 1222 |
if (wait_event_interruptible_timeout(module_wq, |
49668688d module: pass load... |
1223 1224 |
!IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, |
9bea7f239 module: fix bne2 ... |
1225 |
30 * HZ) <= 0) { |
bddb12b32 kernel/module.c: ... |
1226 1227 1228 |
pr_warn("%s: gave up waiting for init of module %s. ", mod->name, owner); |
9bea7f239 module: fix bne2 ... |
1229 1230 1231 |
} return ksym; } |
1da177e4c Linux-2.6.12-rc2 |
1232 1233 1234 1235 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
8f6d03781 module: sysfs cle... |
1236 |
#ifdef CONFIG_SYSFS |
10b465aaf modules: Skip emp... |
1237 |
|
8f6d03781 module: sysfs cle... |
1238 |
#ifdef CONFIG_KALLSYMS |
10b465aaf modules: Skip emp... |
1239 1240 1241 1242 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
a58730c42 module: make modu... |
1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 |
struct module_sect_attr { struct module_attribute mattr; char *name; unsigned long address; }; struct module_sect_attrs { struct attribute_group grp; unsigned int nsections; struct module_sect_attr attrs[0]; }; |
1da177e4c Linux-2.6.12-rc2 |
1256 |
static ssize_t module_sect_show(struct module_attribute *mattr, |
4befb026c module: change at... |
1257 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1258 1259 1260 |
{ struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); |
9f36e2c44 printk: use %pK f... |
1261 1262 |
return sprintf(buf, "0x%pK ", (void *)sattr->address); |
1da177e4c Linux-2.6.12-rc2 |
1263 |
} |
04b1db9fd [PATCH] /sys/modu... |
1264 1265 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1266 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1267 1268 1269 1270 1271 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
8f6d03781 module: sysfs cle... |
1272 |
static void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1273 1274 1275 1276 1277 |
{ unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1278 |
|
1da177e4c Linux-2.6.12-rc2 |
1279 |
/* Count loaded sections and allocate structures */ |
8f6d03781 module: sysfs cle... |
1280 1281 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1282 1283 1284 1285 1286 |
nloaded++; size[0] = ALIGN(sizeof(*sect_attrs) + nloaded * sizeof(sect_attrs->attrs[0]), sizeof(sect_attrs->grp.attrs[0])); size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]); |
04b1db9fd [PATCH] /sys/modu... |
1287 1288 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1289 1290 1291 1292 1293 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1294 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1295 1296 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; |
8f6d03781 module: sysfs cle... |
1297 1298 1299 |
for (i = 0; i < info->hdr->e_shnum; i++) { Elf_Shdr *sec = &info->sechdrs[i]; if (sect_empty(sec)) |
35dead423 modules: don't ex... |
1300 |
continue; |
8f6d03781 module: sysfs cle... |
1301 1302 |
sattr->address = sec->sh_addr; sattr->name = kstrdup(info->secstrings + sec->sh_name, |
04b1db9fd [PATCH] /sys/modu... |
1303 1304 1305 1306 |
GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
361795b1e sysfs: Use sysfs_... |
1307 |
sysfs_attr_init(&sattr->mattr.attr); |
1da177e4c Linux-2.6.12-rc2 |
1308 1309 1310 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 |
sattr->mattr.attr.mode = S_IRUGO; *(gattr++) = &(sattr++)->mattr.attr; } *gattr = NULL; if (sysfs_create_group(&mod->mkobj.kobj, §_attrs->grp)) goto out; mod->sect_attrs = sect_attrs; return; out: |
04b1db9fd [PATCH] /sys/modu... |
1322 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1323 1324 1325 1326 1327 1328 1329 1330 1331 |
} static void remove_sect_attrs(struct module *mod) { if (mod->sect_attrs) { sysfs_remove_group(&mod->mkobj.kobj, &mod->sect_attrs->grp); /* We are positive that no one is using any sect attrs * at this point. Deallocate immediately. */ |
04b1db9fd [PATCH] /sys/modu... |
1332 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1333 1334 1335 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1336 1337 1338 1339 1340 1341 1342 1343 1344 |
/* * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections. */ struct module_notes_attrs { struct kobject *dir; unsigned int notes; struct bin_attribute attrs[0]; }; |
2c3c8bea6 sysfs: add struct... |
1345 |
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, |
6d7601338 Add /sys/module/n... |
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 |
struct bin_attribute *bin_attr, char *buf, loff_t pos, size_t count) { /* * The caller checked the pos and count against our size. */ memcpy(buf, bin_attr->private + pos, count); return count; } static void free_notes_attrs(struct module_notes_attrs *notes_attrs, unsigned int i) { if (notes_attrs->dir) { while (i-- > 0) sysfs_remove_bin_file(notes_attrs->dir, ¬es_attrs->attrs[i]); |
e94320939 modules: fix modu... |
1363 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1364 1365 1366 |
} kfree(notes_attrs); } |
8f6d03781 module: sysfs cle... |
1367 |
static void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1368 1369 1370 1371 |
{ unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1372 1373 1374 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1375 1376 |
/* Count notes sections and allocate structures. */ notes = 0; |
8f6d03781 module: sysfs cle... |
1377 1378 1379 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i]) && (info->sechdrs[i].sh_type == SHT_NOTE)) |
6d7601338 Add /sys/module/n... |
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 |
++notes; if (notes == 0) return; notes_attrs = kzalloc(sizeof(*notes_attrs) + notes * sizeof(notes_attrs->attrs[0]), GFP_KERNEL); if (notes_attrs == NULL) return; notes_attrs->notes = notes; nattr = ¬es_attrs->attrs[0]; |
8f6d03781 module: sysfs cle... |
1393 1394 |
for (loaded = i = 0; i < info->hdr->e_shnum; ++i) { if (sect_empty(&info->sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1395 |
continue; |
8f6d03781 module: sysfs cle... |
1396 |
if (info->sechdrs[i].sh_type == SHT_NOTE) { |
361795b1e sysfs: Use sysfs_... |
1397 |
sysfs_bin_attr_init(nattr); |
6d7601338 Add /sys/module/n... |
1398 1399 |
nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; |
8f6d03781 module: sysfs cle... |
1400 1401 |
nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *) info->sechdrs[i].sh_addr; |
6d7601338 Add /sys/module/n... |
1402 1403 1404 1405 1406 |
nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1407 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 |
if (!notes_attrs->dir) goto out; for (i = 0; i < notes; ++i) if (sysfs_create_bin_file(notes_attrs->dir, ¬es_attrs->attrs[i])) goto out; mod->notes_attrs = notes_attrs; return; out: free_notes_attrs(notes_attrs, i); } static void remove_notes_attrs(struct module *mod) { if (mod->notes_attrs) free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes); } |
1da177e4c Linux-2.6.12-rc2 |
1428 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1429 |
|
8f6d03781 module: sysfs cle... |
1430 1431 |
static inline void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1432 1433 1434 1435 1436 1437 |
{ } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1438 |
|
8f6d03781 module: sysfs cle... |
1439 1440 |
static inline void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1441 1442 1443 1444 1445 1446 |
{ } static inline void remove_notes_attrs(struct module *mod) { } |
8f6d03781 module: sysfs cle... |
1447 |
#endif /* CONFIG_KALLSYMS */ |
1da177e4c Linux-2.6.12-rc2 |
1448 |
|
80a3d1bb4 module: move sysf... |
1449 1450 1451 1452 1453 |
static void add_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; int nowarn; |
75676500f module: make lock... |
1454 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1455 1456 1457 1458 |
list_for_each_entry(use, &mod->target_list, target_list) { nowarn = sysfs_create_link(use->target->holders_dir, &mod->mkobj.kobj, mod->name); } |
75676500f module: make lock... |
1459 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1460 1461 1462 1463 1464 1465 1466 |
#endif } static void del_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
75676500f module: make lock... |
1467 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1468 1469 |
list_for_each_entry(use, &mod->target_list, target_list) sysfs_remove_link(use->target->holders_dir, mod->name); |
75676500f module: make lock... |
1470 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1471 1472 |
#endif } |
6407ebb27 module: Make modu... |
1473 |
static int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1474 1475 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1476 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1477 1478 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1479 1480 1481 1482 1483 1484 1485 |
mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) * (ARRAY_SIZE(modinfo_attrs) + 1)), GFP_KERNEL); if (!mod->modinfo_attrs) return -ENOMEM; temp_attr = mod->modinfo_attrs; |
c988d2b28 [PATCH] modules: ... |
1486 1487 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1488 1489 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
361795b1e sysfs: Use sysfs_... |
1490 |
sysfs_attr_init(&temp_attr->attr); |
03e88ae1b [PATCH] fix modul... |
1491 1492 1493 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1494 1495 1496 |
} return error; } |
6407ebb27 module: Make modu... |
1497 |
static void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1498 1499 1500 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1501 1502 1503 1504 |
for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) { /* pick a field to test for end of list */ if (!attr->attr.name) break; |
c988d2b28 [PATCH] modules: ... |
1505 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1506 1507 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1508 |
} |
03e88ae1b [PATCH] fix modul... |
1509 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1510 |
} |
1da177e4c Linux-2.6.12-rc2 |
1511 |
|
942e44312 module: Fix mod->... |
1512 1513 1514 1515 1516 1517 1518 |
static void mod_kobject_put(struct module *mod) { DECLARE_COMPLETION_ONSTACK(c); mod->mkobj.kobj_completion = &c; kobject_put(&mod->mkobj.kobj); wait_for_completion(&c); } |
6407ebb27 module: Make modu... |
1519 |
static int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1520 1521 |
{ int err; |
6494a93d5 Module: check to ... |
1522 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1523 |
|
823bccfc4 remove "struct su... |
1524 |
if (!module_sysfs_initialized) { |
bddb12b32 kernel/module.c: ... |
1525 1526 |
pr_err("%s: module sysfs not initialized ", mod->name); |
1cc5f7142 [PATCH] load_modu... |
1527 1528 1529 |
err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1530 1531 1532 |
kobj = kset_find_obj(module_kset, mod->name); if (kobj) { |
bddb12b32 kernel/module.c: ... |
1533 1534 |
pr_err("%s: module is already loaded ", mod->name); |
6494a93d5 Module: check to ... |
1535 1536 1537 1538 |
kobject_put(kobj); err = -EINVAL; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1539 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1540 |
|
ac3c8141f Kobject: convert ... |
1541 1542 1543 1544 1545 |
memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj)); mod->mkobj.kobj.kset = module_kset; err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL, "%s", mod->name); if (err) |
942e44312 module: Fix mod->... |
1546 |
mod_kobject_put(mod); |
270a6c4ca /sys/modules/*/ho... |
1547 |
|
97c146ef0 sysfs: fix /sys/m... |
1548 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1549 1550 1551 |
out: return err; } |
6407ebb27 module: Make modu... |
1552 |
static int mod_sysfs_setup(struct module *mod, |
8f6d03781 module: sysfs cle... |
1553 |
const struct load_info *info, |
270a6c4ca /sys/modules/*/ho... |
1554 1555 1556 1557 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
80a3d1bb4 module: move sysf... |
1558 1559 1560 |
err = mod_sysfs_init(mod); if (err) goto out; |
4ff6abff8 kobject: get rid ... |
1561 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1562 1563 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1564 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1565 |
} |
270a6c4ca /sys/modules/*/ho... |
1566 |
|
1da177e4c Linux-2.6.12-rc2 |
1567 1568 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1569 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1570 |
|
c988d2b28 [PATCH] modules: ... |
1571 1572 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1573 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1574 |
|
80a3d1bb4 module: move sysf... |
1575 |
add_usage_links(mod); |
8f6d03781 module: sysfs cle... |
1576 1577 |
add_sect_attrs(mod, info); add_notes_attrs(mod, info); |
80a3d1bb4 module: move sysf... |
1578 |
|
e17e0f51a Driver core: show... |
1579 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1580 |
return 0; |
e17e0f51a Driver core: show... |
1581 1582 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1583 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1584 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1585 |
out_unreg: |
942e44312 module: Fix mod->... |
1586 |
mod_kobject_put(mod); |
80a3d1bb4 module: move sysf... |
1587 |
out: |
1da177e4c Linux-2.6.12-rc2 |
1588 1589 |
return err; } |
34e4e2fef modules: proper c... |
1590 1591 1592 |
static void mod_sysfs_fini(struct module *mod) { |
8f6d03781 module: sysfs cle... |
1593 1594 |
remove_notes_attrs(mod); remove_sect_attrs(mod); |
942e44312 module: Fix mod->... |
1595 |
mod_kobject_put(mod); |
34e4e2fef modules: proper c... |
1596 |
} |
8f6d03781 module: sysfs cle... |
1597 |
#else /* !CONFIG_SYSFS */ |
34e4e2fef modules: proper c... |
1598 |
|
8f6d03781 module: sysfs cle... |
1599 1600 |
static int mod_sysfs_setup(struct module *mod, const struct load_info *info, |
6407ebb27 module: Make modu... |
1601 1602 1603 1604 1605 |
struct kernel_param *kparam, unsigned int num_params) { return 0; } |
34e4e2fef modules: proper c... |
1606 1607 1608 |
static void mod_sysfs_fini(struct module *mod) { } |
36b0360d1 module: fix sysfs... |
1609 1610 1611 |
static void module_remove_modinfo_attrs(struct module *mod) { } |
80a3d1bb4 module: move sysf... |
1612 1613 1614 |
static void del_usage_links(struct module *mod) { } |
34e4e2fef modules: proper c... |
1615 |
#endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1616 |
|
36b0360d1 module: fix sysfs... |
1617 |
static void mod_sysfs_teardown(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1618 |
{ |
80a3d1bb4 module: move sysf... |
1619 |
del_usage_links(mod); |
c988d2b28 [PATCH] modules: ... |
1620 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1621 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1622 1623 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1624 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 |
} /* * unlink the module with the whole machine is stopped with interrupts off * - this defends against kallsyms not taking locks */ static int __unlink_module(void *_mod) { struct module *mod = _mod; list_del(&mod->list); |
5336377d6 modules: Fix modu... |
1635 |
module_bug_cleanup(mod); |
1da177e4c Linux-2.6.12-rc2 |
1636 1637 |
return 0; } |
84e1c6bb3 x86: Add RO/NX pr... |
1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 |
#ifdef CONFIG_DEBUG_SET_MODULE_RONX /* * LKM RO/NX protection: protect module's text/ro-data * from modification and any data from execution. */ void set_page_attributes(void *start, void *end, int (*set)(unsigned long start, int num_pages)) { unsigned long begin_pfn = PFN_DOWN((unsigned long)start); unsigned long end_pfn = PFN_DOWN((unsigned long)end); if (end_pfn > begin_pfn) set(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn); } static void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { /* begin and end PFNs of the current subsection */ unsigned long begin_pfn; unsigned long end_pfn; /* * Set RO for module text and RO-data: * - Always protect first page. * - Do not protect last partial page. */ if (ro_size > 0) set_page_attributes(base, base + ro_size, set_memory_ro); /* * Set NX permissions for module data: * - Do not protect first partial page. * - Always protect last page. */ if (total_size > text_size) { begin_pfn = PFN_UP((unsigned long)base + text_size); end_pfn = PFN_UP((unsigned long)base + total_size); if (end_pfn > begin_pfn) set_memory_nx(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn); } } |
01526ed08 module: split uns... |
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 |
static void unset_module_core_ro_nx(struct module *mod) { set_page_attributes(mod->module_core + mod->core_text_size, mod->module_core + mod->core_size, set_memory_x); set_page_attributes(mod->module_core, mod->module_core + mod->core_ro_size, set_memory_rw); } static void unset_module_init_ro_nx(struct module *mod) { set_page_attributes(mod->module_init + mod->init_text_size, mod->module_init + mod->init_size, set_memory_x); set_page_attributes(mod->module_init, mod->module_init + mod->init_ro_size, set_memory_rw); |
84e1c6bb3 x86: Add RO/NX pr... |
1699 1700 1701 |
} /* Iterate through all modules and set each module's text as RW */ |
5d05c7084 minor ANSI protot... |
1702 |
void set_all_modules_text_rw(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1703 1704 1705 1706 1707 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1708 1709 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 |
if ((mod->module_core) && (mod->core_text_size)) { set_page_attributes(mod->module_core, mod->module_core + mod->core_text_size, set_memory_rw); } if ((mod->module_init) && (mod->init_text_size)) { set_page_attributes(mod->module_init, mod->module_init + mod->init_text_size, set_memory_rw); } } mutex_unlock(&module_mutex); } /* Iterate through all modules and set each module's text as RO */ |
5d05c7084 minor ANSI protot... |
1725 |
void set_all_modules_text_ro(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1726 1727 1728 1729 1730 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1731 1732 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 |
if ((mod->module_core) && (mod->core_text_size)) { set_page_attributes(mod->module_core, mod->module_core + mod->core_text_size, set_memory_ro); } if ((mod->module_init) && (mod->init_text_size)) { set_page_attributes(mod->module_init, mod->module_init + mod->init_text_size, set_memory_ro); } } mutex_unlock(&module_mutex); } #else static inline void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { } |
01526ed08 module: split uns... |
1748 1749 |
static void unset_module_core_ro_nx(struct module *mod) { } static void unset_module_init_ro_nx(struct module *mod) { } |
84e1c6bb3 x86: Add RO/NX pr... |
1750 |
#endif |
74e08fcf7 modules: add defa... |
1751 1752 1753 1754 1755 1756 1757 1758 |
void __weak module_free(struct module *mod, void *module_region) { vfree(module_region); } void __weak module_arch_cleanup(struct module *mod) { } |
75676500f module: make lock... |
1759 |
/* Free a module, remove from lists, etc. */ |
1da177e4c Linux-2.6.12-rc2 |
1760 1761 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
1762 |
trace_module_free(mod); |
36b0360d1 module: fix sysfs... |
1763 |
mod_sysfs_teardown(mod); |
1da177e4c Linux-2.6.12-rc2 |
1764 |
|
944a1fa01 module: don't unl... |
1765 1766 1767 |
/* We leave it in list to prevent duplicate loads, but make sure * that noone uses it while it's being deconstructed. */ mod->state = MODULE_STATE_UNFORMED; |
b82bab4bb dynamic debug: mo... |
1768 1769 |
/* Remove dynamic debug info */ ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
1770 1771 1772 1773 1774 |
/* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
1775 1776 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
944a1fa01 module: don't unl... |
1777 1778 1779 1780 |
/* Now we can delete it from the lists */ mutex_lock(&module_mutex); stop_machine(__unlink_module, mod, NULL); mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1781 |
/* This may be NULL, but that's OK */ |
01526ed08 module: split uns... |
1782 |
unset_module_init_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1783 1784 |
module_free(mod, mod->module_init); kfree(mod->args); |
259354dea module: encapsula... |
1785 |
percpu_modfree(mod); |
9f85a4bbb module: refactor ... |
1786 |
|
fbb9ce953 [PATCH] lockdep: ... |
1787 1788 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1789 |
/* Finally, free the core (containing the module structure) */ |
01526ed08 module: split uns... |
1790 |
unset_module_core_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1791 |
module_free(mod, mod->module_core); |
eb8cdec4a nommu: add suppor... |
1792 1793 1794 1795 |
#ifdef CONFIG_MPU update_protections(current->mm); #endif |
1da177e4c Linux-2.6.12-rc2 |
1796 1797 1798 1799 1800 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1801 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1802 |
|
24da1cbff modules: remove m... |
1803 |
preempt_disable(); |
414fd31b2 module: Make find... |
1804 1805 1806 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1807 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1808 |
|
414fd31b2 module: Make find... |
1809 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1810 1811 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1812 1813 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1814 |
* in the kernel or in some other module's exported symbol table. |
be593f4ce module: verify_ex... |
1815 1816 |
* * You must hold the module_mutex. |
eea8b54dc [PATCH] modules: ... |
1817 1818 1819 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1820 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1821 |
struct module *owner; |
b211104d1 module: Enhance v... |
1822 1823 1824 1825 1826 1827 1828 1829 |
const struct kernel_symbol *s; struct { const struct kernel_symbol *sym; unsigned int num; } arr[] = { { mod->syms, mod->num_syms }, { mod->gpl_syms, mod->num_gpl_syms }, { mod->gpl_future_syms, mod->num_gpl_future_syms }, |
f7f5b6755 Shrink struct mod... |
1830 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1831 1832 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1833 |
#endif |
b211104d1 module: Enhance v... |
1834 |
}; |
eea8b54dc [PATCH] modules: ... |
1835 |
|
b211104d1 module: Enhance v... |
1836 1837 |
for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { |
be593f4ce module: verify_ex... |
1838 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
bddb12b32 kernel/module.c: ... |
1839 |
pr_err("%s: exports duplicate symbol %s" |
b211104d1 module: Enhance v... |
1840 1841 1842 1843 1844 |
" (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1845 |
} |
b211104d1 module: Enhance v... |
1846 1847 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1848 |
} |
9a4b9708f module: fix and e... |
1849 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
49668688d module: pass load... |
1850 1851 1852 1853 |
static int simplify_symbols(struct module *mod, const struct load_info *info) { Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; Elf_Sym *sym = (void *)symsec->sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1854 |
unsigned long secbase; |
49668688d module: pass load... |
1855 |
unsigned int i; |
1da177e4c Linux-2.6.12-rc2 |
1856 |
int ret = 0; |
414fd31b2 module: Make find... |
1857 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1858 |
|
49668688d module: pass load... |
1859 1860 |
for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) { const char *name = info->strtab + sym[i].st_name; |
1da177e4c Linux-2.6.12-rc2 |
1861 1862 |
switch (sym[i].st_shndx) { case SHN_COMMON: |
80375980f lto: Handle LTO c... |
1863 1864 1865 |
/* Ignore common symbols */ if (!strncmp(name, "__gnu_lto", 9)) break; |
1da177e4c Linux-2.6.12-rc2 |
1866 1867 |
/* We compiled with -fno-common. These are not supposed to happen. */ |
5e1241692 module: replace D... |
1868 1869 |
pr_debug("Common symbol: %s ", name); |
1da177e4c Linux-2.6.12-rc2 |
1870 1871 1872 1873 1874 1875 1876 1877 |
printk("%s: please compile with -fno-common ", mod->name); ret = -ENOEXEC; break; case SHN_ABS: /* Don't need to do anything */ |
5e1241692 module: replace D... |
1878 1879 |
pr_debug("Absolute symbol: 0x%08lx ", |
1da177e4c Linux-2.6.12-rc2 |
1880 1881 1882 1883 |
(long)sym[i].st_value); break; case SHN_UNDEF: |
49668688d module: pass load... |
1884 |
ksym = resolve_symbol_wait(mod, info, name); |
1da177e4c Linux-2.6.12-rc2 |
1885 |
/* Ok if resolved. */ |
9bea7f239 module: fix bne2 ... |
1886 |
if (ksym && !IS_ERR(ksym)) { |
414fd31b2 module: Make find... |
1887 |
sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1888 |
break; |
414fd31b2 module: Make find... |
1889 |
} |
1da177e4c Linux-2.6.12-rc2 |
1890 |
/* Ok if weak. */ |
9bea7f239 module: fix bne2 ... |
1891 |
if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) |
1da177e4c Linux-2.6.12-rc2 |
1892 |
break; |
bddb12b32 kernel/module.c: ... |
1893 1894 1895 |
pr_warn("%s: Unknown symbol %s (err %li) ", mod->name, name, PTR_ERR(ksym)); |
9bea7f239 module: fix bne2 ... |
1896 |
ret = PTR_ERR(ksym) ?: -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
1897 1898 1899 1900 |
break; default: /* Divert to percpu allocation if a percpu var. */ |
49668688d module: pass load... |
1901 |
if (sym[i].st_shndx == info->index.pcpu) |
259354dea module: encapsula... |
1902 |
secbase = (unsigned long)mod_percpu(mod); |
1da177e4c Linux-2.6.12-rc2 |
1903 |
else |
49668688d module: pass load... |
1904 |
secbase = info->sechdrs[sym[i].st_shndx].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1905 1906 1907 1908 1909 1910 1911 |
sym[i].st_value += secbase; break; } } return ret; } |
49668688d module: pass load... |
1912 |
static int apply_relocations(struct module *mod, const struct load_info *info) |
22e268ebe module: refactor ... |
1913 1914 1915 1916 1917 |
{ unsigned int i; int err = 0; /* Now do relocations. */ |
49668688d module: pass load... |
1918 1919 |
for (i = 1; i < info->hdr->e_shnum; i++) { unsigned int infosec = info->sechdrs[i].sh_info; |
22e268ebe module: refactor ... |
1920 1921 |
/* Not a valid relocation section? */ |
49668688d module: pass load... |
1922 |
if (infosec >= info->hdr->e_shnum) |
22e268ebe module: refactor ... |
1923 1924 1925 |
continue; /* Don't bother with non-allocated sections */ |
49668688d module: pass load... |
1926 |
if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) |
22e268ebe module: refactor ... |
1927 |
continue; |
49668688d module: pass load... |
1928 1929 1930 1931 1932 1933 |
if (info->sechdrs[i].sh_type == SHT_REL) err = apply_relocate(info->sechdrs, info->strtab, info->index.sym, i, mod); else if (info->sechdrs[i].sh_type == SHT_RELA) err = apply_relocate_add(info->sechdrs, info->strtab, info->index.sym, i, mod); |
22e268ebe module: refactor ... |
1934 1935 1936 1937 1938 |
if (err < 0) break; } return err; } |
088af9a6e module: fix modul... |
1939 1940 1941 1942 1943 1944 1945 |
/* Additional bytes needed by arch in front of individual sections */ unsigned int __weak arch_mod_section_prepend(struct module *mod, unsigned int section) { /* default implementation just returns zero */ return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1946 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1947 1948 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1949 1950 |
{ long ret; |
088af9a6e module: fix modul... |
1951 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1952 1953 1954 1955 1956 1957 1958 1959 1960 |
ret = ALIGN(*size, sechdr->sh_addralign ?: 1); *size = ret + sechdr->sh_size; return ret; } /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld might -- code, read-only data, read-write data, small data. Tally sizes, and place the offsets into sh_entsize fields: high bit means it belongs in init. */ |
49668688d module: pass load... |
1961 |
static void layout_sections(struct module *mod, struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 |
{ static unsigned long const masks[][2] = { /* NOTE: all executable code must be the first section * in this array; otherwise modify the text_size * finder in the two loops below */ { SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL }, { SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL }, { SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL }, { ARCH_SHF_SMALL | SHF_ALLOC, 0 } }; unsigned int m, i; |
49668688d module: pass load... |
1973 1974 |
for (i = 0; i < info->hdr->e_shnum; i++) info->sechdrs[i].sh_entsize = ~0UL; |
1da177e4c Linux-2.6.12-rc2 |
1975 |
|
5e1241692 module: replace D... |
1976 1977 |
pr_debug("Core section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
1978 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
1979 1980 1981 |
for (i = 0; i < info->hdr->e_shnum; ++i) { Elf_Shdr *s = &info->sechdrs[i]; const char *sname = info->secstrings + s->sh_name; |
1da177e4c Linux-2.6.12-rc2 |
1982 1983 1984 1985 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
1986 |
|| strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1987 |
continue; |
088af9a6e module: fix modul... |
1988 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
5e1241692 module: replace D... |
1989 1990 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
1991 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1992 1993 1994 |
switch (m) { case 0: /* executable */ mod->core_size = debug_align(mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1995 |
mod->core_text_size = mod->core_size; |
84e1c6bb3 x86: Add RO/NX pr... |
1996 1997 1998 1999 2000 2001 2002 2003 2004 |
break; case 1: /* RO: text and ro-data */ mod->core_size = debug_align(mod->core_size); mod->core_ro_size = mod->core_size; break; case 3: /* whole core */ mod->core_size = debug_align(mod->core_size); break; } |
1da177e4c Linux-2.6.12-rc2 |
2005 |
} |
5e1241692 module: replace D... |
2006 2007 |
pr_debug("Init section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
2008 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
2009 2010 2011 |
for (i = 0; i < info->hdr->e_shnum; ++i) { Elf_Shdr *s = &info->sechdrs[i]; const char *sname = info->secstrings + s->sh_name; |
1da177e4c Linux-2.6.12-rc2 |
2012 2013 2014 2015 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2016 |
|| !strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2017 |
continue; |
088af9a6e module: fix modul... |
2018 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
2019 |
| INIT_OFFSET_MASK); |
5e1241692 module: replace D... |
2020 2021 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2022 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2023 2024 2025 |
switch (m) { case 0: /* executable */ mod->init_size = debug_align(mod->init_size); |
1da177e4c Linux-2.6.12-rc2 |
2026 |
mod->init_text_size = mod->init_size; |
84e1c6bb3 x86: Add RO/NX pr... |
2027 2028 2029 2030 2031 2032 2033 2034 2035 |
break; case 1: /* RO: text and ro-data */ mod->init_size = debug_align(mod->init_size); mod->init_ro_size = mod->init_size; break; case 3: /* whole init */ mod->init_size = debug_align(mod->init_size); break; } |
1da177e4c Linux-2.6.12-rc2 |
2036 2037 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2038 2039 2040 2041 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
2042 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
2043 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
bddb12b32 kernel/module.c: ... |
2044 2045 2046 |
pr_warn("%s: module license '%s' taints kernel. ", mod->name, license); |
373d4d099 taint: add explic... |
2047 2048 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 |
} } /* Parse tag=value strings from .modinfo section */ static char *next_string(char *string, unsigned long *secsize) { /* Skip non-zero chars */ while (string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } /* Skip any zero padding. */ while (!string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } return string; } |
49668688d module: pass load... |
2070 |
static char *get_modinfo(struct load_info *info, const char *tag) |
1da177e4c Linux-2.6.12-rc2 |
2071 2072 2073 |
{ char *p; unsigned int taglen = strlen(tag); |
49668688d module: pass load... |
2074 2075 |
Elf_Shdr *infosec = &info->sechdrs[info->index.info]; unsigned long size = infosec->sh_size; |
1da177e4c Linux-2.6.12-rc2 |
2076 |
|
49668688d module: pass load... |
2077 |
for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) { |
1da177e4c Linux-2.6.12-rc2 |
2078 2079 2080 2081 2082 |
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
49668688d module: pass load... |
2083 |
static void setup_modinfo(struct module *mod, struct load_info *info) |
c988d2b28 [PATCH] modules: ... |
2084 2085 2086 2087 2088 2089 |
{ struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) |
49668688d module: pass load... |
2090 |
attr->setup(mod, get_modinfo(info, attr->attr.name)); |
c988d2b28 [PATCH] modules: ... |
2091 2092 |
} } |
c988d2b28 [PATCH] modules: ... |
2093 |
|
a263f7763 module: fix memor... |
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 |
static void free_modinfo(struct module *mod) { struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->free) attr->free(mod); } } |
1da177e4c Linux-2.6.12-rc2 |
2104 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
2105 2106 2107 2108 2109 2110 |
/* lookup symbol in given range of kernel_symbols */ static const struct kernel_symbol *lookup_symbol(const char *name, const struct kernel_symbol *start, const struct kernel_symbol *stop) { |
9d63487f8 module: Use binar... |
2111 2112 |
return bsearch(name, start, stop - start, sizeof(struct kernel_symbol), cmp_name); |
15bba37d6 module: fix build... |
2113 |
} |
ca4787b77 kernel/module.c: ... |
2114 2115 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
2116 |
{ |
ca4787b77 kernel/module.c: ... |
2117 2118 2119 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
2120 |
else |
ca4787b77 kernel/module.c: ... |
2121 2122 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
2123 2124 2125 |
} /* As per nm */ |
eded41c1c module: kallsyms ... |
2126 |
static char elf_type(const Elf_Sym *sym, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2127 |
{ |
eded41c1c module: kallsyms ... |
2128 |
const Elf_Shdr *sechdrs = info->sechdrs; |
1da177e4c Linux-2.6.12-rc2 |
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 |
if (ELF_ST_BIND(sym->st_info) == STB_WEAK) { if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) return 'v'; else return 'w'; } if (sym->st_shndx == SHN_UNDEF) return 'U'; if (sym->st_shndx == SHN_ABS) return 'a'; if (sym->st_shndx >= SHN_LORESERVE) return '?'; if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR) return 't'; if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) { if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE)) return 'r'; else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL) return 'g'; else return 'd'; } if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) { if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL) return 's'; else return 'b'; } |
eded41c1c module: kallsyms ... |
2158 2159 |
if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) { |
1da177e4c Linux-2.6.12-rc2 |
2160 |
return 'n'; |
eded41c1c module: kallsyms ... |
2161 |
} |
1da177e4c Linux-2.6.12-rc2 |
2162 2163 |
return '?'; } |
4a4962263 module: reduce sy... |
2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 |
static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, unsigned int shnum) { const Elf_Shdr *sec; if (src->st_shndx == SHN_UNDEF || src->st_shndx >= shnum || !src->st_name) return false; sec = sechdrs + src->st_shndx; if (!(sec->sh_flags & SHF_ALLOC) #ifndef CONFIG_KALLSYMS_ALL || !(sec->sh_flags & SHF_EXECINSTR) #endif || (sec->sh_entsize & INIT_OFFSET_MASK)) return false; return true; } |
48fd11880 module: Fix perfo... |
2184 2185 2186 2187 2188 2189 2190 |
/* * We only allocate and copy the strings needed by the parts of symtab * we keep. This is simple, but has the effect of making multiple * copies of duplicates. We could be more sophisticated, see * linux-kernel thread starting with * <73defb5e4bca04a6431392cc341112b1@localhost>. */ |
49668688d module: pass load... |
2191 |
static void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2192 |
{ |
49668688d module: pass load... |
2193 2194 |
Elf_Shdr *symsect = info->sechdrs + info->index.sym; Elf_Shdr *strsect = info->sechdrs + info->index.str; |
4a4962263 module: reduce sy... |
2195 |
const Elf_Sym *src; |
54523ec71 module: Remove a ... |
2196 |
unsigned int i, nsrc, ndst, strtab_size = 0; |
4a4962263 module: reduce sy... |
2197 2198 2199 2200 |
/* Put symbol section at end of init part of module. */ symsect->sh_flags |= SHF_ALLOC; symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect, |
49668688d module: pass load... |
2201 |
info->index.sym) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2202 2203 |
pr_debug("\t%s ", info->secstrings + symsect->sh_name); |
4a4962263 module: reduce sy... |
2204 |
|
49668688d module: pass load... |
2205 |
src = (void *)info->hdr + symsect->sh_offset; |
4a4962263 module: reduce sy... |
2206 |
nsrc = symsect->sh_size / sizeof(*src); |
70b1e9161 module: Add comme... |
2207 |
|
48fd11880 module: Fix perfo... |
2208 |
/* Compute total space required for the core symbols' strtab. */ |
59ef28b1f module: fix out-b... |
2209 2210 2211 2212 |
for (ndst = i = 0; i < nsrc; i++) { if (i == 0 || is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) { strtab_size += strlen(&info->strtab[src[i].st_name])+1; |
48fd11880 module: Fix perfo... |
2213 |
ndst++; |
554bdfe5a module: reduce st... |
2214 |
} |
59ef28b1f module: fix out-b... |
2215 |
} |
4a4962263 module: reduce sy... |
2216 2217 |
/* Append room for core symbols at end of core part. */ |
49668688d module: pass load... |
2218 |
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); |
48fd11880 module: Fix perfo... |
2219 2220 |
info->stroffs = mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym); mod->core_size += strtab_size; |
4a4962263 module: reduce sy... |
2221 |
|
554bdfe5a module: reduce st... |
2222 2223 2224 |
/* Put string table section at end of init part of module. */ strsect->sh_flags |= SHF_ALLOC; strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect, |
49668688d module: pass load... |
2225 |
info->index.str) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2226 2227 |
pr_debug("\t%s ", info->secstrings + strsect->sh_name); |
4a4962263 module: reduce sy... |
2228 |
} |
811d66a0e module: group pos... |
2229 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2230 |
{ |
4a4962263 module: reduce sy... |
2231 2232 2233 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
2234 |
char *s; |
eded41c1c module: kallsyms ... |
2235 |
Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; |
1da177e4c Linux-2.6.12-rc2 |
2236 |
|
eded41c1c module: kallsyms ... |
2237 2238 |
mod->symtab = (void *)symsec->sh_addr; mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym); |
511ca6ae4 module: fix crash... |
2239 2240 |
/* Make sure we get permanent strtab: don't use info->strtab. */ mod->strtab = (void *)info->sechdrs[info->index.str].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
2241 2242 2243 |
/* Set types up while we still have access to sections. */ for (i = 0; i < mod->num_symtab; i++) |
eded41c1c module: kallsyms ... |
2244 |
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info); |
4a4962263 module: reduce sy... |
2245 |
|
d913188c7 module: layout_an... |
2246 |
mod->core_symtab = dst = mod->module_core + info->symoffs; |
48fd11880 module: Fix perfo... |
2247 |
mod->core_strtab = s = mod->module_core + info->stroffs; |
4a4962263 module: reduce sy... |
2248 |
src = mod->symtab; |
59ef28b1f module: fix out-b... |
2249 2250 2251 2252 2253 2254 2255 2256 |
for (ndst = i = 0; i < mod->num_symtab; i++) { if (i == 0 || is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) { dst[ndst] = src[i]; dst[ndst++].st_name = s - mod->core_strtab; s += strlcpy(s, &mod->strtab[src[i].st_name], KSYM_NAME_LEN) + 1; } |
4a4962263 module: reduce sy... |
2257 2258 |
} mod->core_num_syms = ndst; |
1da177e4c Linux-2.6.12-rc2 |
2259 2260 |
} #else |
49668688d module: pass load... |
2261 |
static inline void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2262 2263 |
{ } |
3ae91c21d module: fix up CO... |
2264 |
|
abbce906d (trivial) Fix com... |
2265 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2266 2267 2268 |
{ } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
2269 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
2270 |
{ |
811d66a0e module: group pos... |
2271 2272 |
if (!debug) return; |
e9d376f0f dynamic debug: co... |
2273 2274 |
#ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) |
bddb12b32 kernel/module.c: ... |
2275 2276 2277 |
pr_err("dynamic debug error adding module: %s ", debug->modname); |
e9d376f0f dynamic debug: co... |
2278 |
#endif |
5e458cc0f module: simplify ... |
2279 |
} |
346e15beb driver core: basi... |
2280 |
|
ff49d74ad module: initializ... |
2281 2282 2283 2284 2285 |
static void dynamic_debug_remove(struct _ddebug *debug) { if (debug) ddebug_remove_module(debug->modname); } |
74e08fcf7 modules: add defa... |
2286 2287 |
void * __weak module_alloc(unsigned long size) { |
82fab442f modules: don't ha... |
2288 |
return vmalloc_exec(size); |
74e08fcf7 modules: add defa... |
2289 |
} |
3a642e99b modules: Take a s... |
2290 2291 2292 2293 2294 |
static void *module_alloc_update_bounds(unsigned long size) { void *ret = module_alloc(size); if (ret) { |
75676500f module: make lock... |
2295 |
mutex_lock(&module_mutex); |
3a642e99b modules: Take a s... |
2296 2297 2298 2299 2300 |
/* Update module bounds. */ if ((unsigned long)ret < module_addr_min) module_addr_min = (unsigned long)ret; if ((unsigned long)ret + size > module_addr_max) module_addr_max = (unsigned long)ret + size; |
75676500f module: make lock... |
2301 |
mutex_unlock(&module_mutex); |
3a642e99b modules: Take a s... |
2302 2303 2304 |
} return ret; } |
4f2294b6d kmemleak: Add mod... |
2305 |
#ifdef CONFIG_DEBUG_KMEMLEAK |
49668688d module: pass load... |
2306 2307 |
static void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2308 2309 2310 2311 |
{ unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
2312 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2313 |
|
49668688d module: pass load... |
2314 |
for (i = 1; i < info->hdr->e_shnum; i++) { |
06c9494c0 kmemleak: Scan al... |
2315 2316 2317 2318 |
/* Scan all writable sections that's not executable */ if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) || !(info->sechdrs[i].sh_flags & SHF_WRITE) || (info->sechdrs[i].sh_flags & SHF_EXECINSTR)) |
4f2294b6d kmemleak: Add mod... |
2319 |
continue; |
49668688d module: pass load... |
2320 2321 |
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, info->sechdrs[i].sh_size, GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2322 2323 2324 |
} } #else |
49668688d module: pass load... |
2325 2326 |
static inline void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2327 2328 2329 |
{ } #endif |
106a4ee25 module: signature... |
2330 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
2331 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2332 2333 |
{ int err = -ENOKEY; |
34e1169d9 module: add sysca... |
2334 2335 |
const unsigned long markerlen = sizeof(MODULE_SIG_STRING) - 1; const void *mod = info->hdr; |
caabe2405 MODSIGN: Move the... |
2336 |
|
34e1169d9 module: add sysca... |
2337 2338 |
if (info->len > markerlen && memcmp(mod + info->len - markerlen, MODULE_SIG_STRING, markerlen) == 0) { |
caabe2405 MODSIGN: Move the... |
2339 |
/* We truncate the module to discard the signature */ |
34e1169d9 module: add sysca... |
2340 2341 |
info->len -= markerlen; err = mod_verify_sig(mod, &info->len); |
106a4ee25 module: signature... |
2342 2343 2344 2345 2346 2347 2348 2349 |
} if (!err) { info->sig_ok = true; return 0; } /* Not having a signature is only an error if we're strict. */ |
1d0059f3a MODSIGN: Add FIPS... |
2350 2351 2352 2353 |
if (err < 0 && fips_enabled) panic("Module verification failed with error %d in FIPS mode ", err); |
106a4ee25 module: signature... |
2354 2355 2356 2357 2358 2359 |
if (err == -ENOKEY && !sig_enforce) err = 0; return err; } #else /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2360 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2361 2362 2363 2364 |
{ return 0; } #endif /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2365 2366 |
/* Sanity checks against invalid binaries, wrong arch, weird elf version. */ static int elf_header_check(struct load_info *info) |
40dd2560e module: refactor ... |
2367 |
{ |
34e1169d9 module: add sysca... |
2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 |
if (info->len < sizeof(*(info->hdr))) return -ENOEXEC; if (memcmp(info->hdr->e_ident, ELFMAG, SELFMAG) != 0 || info->hdr->e_type != ET_REL || !elf_check_arch(info->hdr) || info->hdr->e_shentsize != sizeof(Elf_Shdr)) return -ENOEXEC; if (info->hdr->e_shoff >= info->len || (info->hdr->e_shnum * sizeof(Elf_Shdr) > info->len - info->hdr->e_shoff)) return -ENOEXEC; |
40dd2560e module: refactor ... |
2381 |
|
34e1169d9 module: add sysca... |
2382 2383 2384 2385 2386 2387 |
return 0; } /* Sets info->hdr and info->len. */ static int copy_module_from_user(const void __user *umod, unsigned long len, struct load_info *info) |
40dd2560e module: refactor ... |
2388 2389 |
{ int err; |
40dd2560e module: refactor ... |
2390 |
|
34e1169d9 module: add sysca... |
2391 2392 |
info->len = len; if (info->len < sizeof(*(info->hdr))) |
40dd2560e module: refactor ... |
2393 |
return -ENOEXEC; |
2e72d51b4 security: introdu... |
2394 2395 2396 |
err = security_kernel_module_from_file(NULL); if (err) return err; |
40dd2560e module: refactor ... |
2397 |
/* Suck in entire file: we'll want most of it. */ |
34e1169d9 module: add sysca... |
2398 2399 |
info->hdr = vmalloc(info->len); if (!info->hdr) |
40dd2560e module: refactor ... |
2400 |
return -ENOMEM; |
34e1169d9 module: add sysca... |
2401 2402 2403 |
if (copy_from_user(info->hdr, umod, info->len) != 0) { vfree(info->hdr); return -EFAULT; |
40dd2560e module: refactor ... |
2404 |
} |
34e1169d9 module: add sysca... |
2405 2406 2407 2408 2409 2410 |
return 0; } /* Sets info->hdr and info->len. */ static int copy_module_from_fd(int fd, struct load_info *info) { |
a2e0578be switch copy_modul... |
2411 |
struct fd f = fdget(fd); |
34e1169d9 module: add sysca... |
2412 2413 2414 2415 |
int err; struct kstat stat; loff_t pos; ssize_t bytes = 0; |
a2e0578be switch copy_modul... |
2416 |
if (!f.file) |
34e1169d9 module: add sysca... |
2417 |
return -ENOEXEC; |
a2e0578be switch copy_modul... |
2418 |
err = security_kernel_module_from_file(f.file); |
106a4ee25 module: signature... |
2419 |
if (err) |
2e72d51b4 security: introdu... |
2420 |
goto out; |
106a4ee25 module: signature... |
2421 |
|
a2e0578be switch copy_modul... |
2422 |
err = vfs_getattr(&f.file->f_path, &stat); |
106a4ee25 module: signature... |
2423 |
if (err) |
34e1169d9 module: add sysca... |
2424 |
goto out; |
40dd2560e module: refactor ... |
2425 |
|
34e1169d9 module: add sysca... |
2426 2427 2428 |
if (stat.size > INT_MAX) { err = -EFBIG; goto out; |
40dd2560e module: refactor ... |
2429 |
} |
52441fa8f module: prevent w... |
2430 2431 2432 2433 2434 2435 |
/* Don't hand 0 to vmalloc, it whines. */ if (stat.size == 0) { err = -EINVAL; goto out; } |
34e1169d9 module: add sysca... |
2436 2437 2438 2439 |
info->hdr = vmalloc(stat.size); if (!info->hdr) { err = -ENOMEM; goto out; |
40dd2560e module: refactor ... |
2440 |
} |
d913188c7 module: layout_an... |
2441 |
|
34e1169d9 module: add sysca... |
2442 2443 |
pos = 0; while (pos < stat.size) { |
a2e0578be switch copy_modul... |
2444 |
bytes = kernel_read(f.file, pos, (char *)(info->hdr) + pos, |
34e1169d9 module: add sysca... |
2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 |
stat.size - pos); if (bytes < 0) { vfree(info->hdr); err = bytes; goto out; } if (bytes == 0) break; pos += bytes; } info->len = pos; |
40dd2560e module: refactor ... |
2456 |
|
34e1169d9 module: add sysca... |
2457 |
out: |
a2e0578be switch copy_modul... |
2458 |
fdput(f); |
40dd2560e module: refactor ... |
2459 2460 |
return err; } |
d913188c7 module: layout_an... |
2461 2462 |
static void free_copy(struct load_info *info) { |
d913188c7 module: layout_an... |
2463 2464 |
vfree(info->hdr); } |
2f3238aeb module: add flags... |
2465 |
static int rewrite_section_headers(struct load_info *info, int flags) |
8b5f61a79 module: refactor ... |
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 |
{ unsigned int i; /* This should always be true, but let's be sure. */ info->sechdrs[0].sh_addr = 0; for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; if (shdr->sh_type != SHT_NOBITS && info->len < shdr->sh_offset + shdr->sh_size) { |
bddb12b32 kernel/module.c: ... |
2476 2477 |
pr_err("Module len %lu truncated ", info->len); |
8b5f61a79 module: refactor ... |
2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 |
return -ENOEXEC; } /* Mark all sections sh_addr with their address in the temporary image. */ shdr->sh_addr = (size_t)info->hdr + shdr->sh_offset; #ifndef CONFIG_MODULE_UNLOAD /* Don't load .exit sections */ if (strstarts(info->secstrings+shdr->sh_name, ".exit")) shdr->sh_flags &= ~(unsigned long)SHF_ALLOC; #endif |
8b5f61a79 module: refactor ... |
2490 |
} |
d6df72a06 module: refactor ... |
2491 2492 |
/* Track but don't keep modinfo and version sections. */ |
2f3238aeb module: add flags... |
2493 2494 2495 2496 |
if (flags & MODULE_INIT_IGNORE_MODVERSIONS) info->index.vers = 0; /* Pretend no __versions section! */ else info->index.vers = find_sec(info, "__versions"); |
49668688d module: pass load... |
2497 |
info->index.info = find_sec(info, ".modinfo"); |
d6df72a06 module: refactor ... |
2498 2499 |
info->sechdrs[info->index.info].sh_flags &= ~(unsigned long)SHF_ALLOC; info->sechdrs[info->index.vers].sh_flags &= ~(unsigned long)SHF_ALLOC; |
8b5f61a79 module: refactor ... |
2500 2501 |
return 0; } |
3264d3f9d module: add load_... |
2502 2503 2504 2505 2506 2507 2508 2509 |
/* * Set up our basic convenience variables (pointers to section headers, * search for module section index etc), and do some basic section * verification. * * Return the temporary module pointer (we'll replace it with the final * one when we move the module sections around). */ |
2f3238aeb module: add flags... |
2510 |
static struct module *setup_load_info(struct load_info *info, int flags) |
3264d3f9d module: add load_... |
2511 2512 |
{ unsigned int i; |
8b5f61a79 module: refactor ... |
2513 |
int err; |
3264d3f9d module: add load_... |
2514 2515 2516 2517 |
struct module *mod; /* Set up the convenience variables */ info->sechdrs = (void *)info->hdr + info->hdr->e_shoff; |
8b5f61a79 module: refactor ... |
2518 2519 |
info->secstrings = (void *)info->hdr + info->sechdrs[info->hdr->e_shstrndx].sh_offset; |
3264d3f9d module: add load_... |
2520 |
|
2f3238aeb module: add flags... |
2521 |
err = rewrite_section_headers(info, flags); |
8b5f61a79 module: refactor ... |
2522 2523 |
if (err) return ERR_PTR(err); |
3264d3f9d module: add load_... |
2524 |
|
8b5f61a79 module: refactor ... |
2525 2526 |
/* Find internal symbols and strings. */ for (i = 1; i < info->hdr->e_shnum; i++) { |
3264d3f9d module: add load_... |
2527 2528 2529 |
if (info->sechdrs[i].sh_type == SHT_SYMTAB) { info->index.sym = i; info->index.str = info->sechdrs[i].sh_link; |
8b5f61a79 module: refactor ... |
2530 2531 2532 |
info->strtab = (char *)info->hdr + info->sechdrs[info->index.str].sh_offset; break; |
3264d3f9d module: add load_... |
2533 |
} |
3264d3f9d module: add load_... |
2534 |
} |
49668688d module: pass load... |
2535 |
info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); |
3264d3f9d module: add load_... |
2536 |
if (!info->index.mod) { |
bddb12b32 kernel/module.c: ... |
2537 2538 |
pr_warn("No module found in object "); |
3264d3f9d module: add load_... |
2539 2540 2541 2542 2543 2544 |
return ERR_PTR(-ENOEXEC); } /* This is temporary: point mod into copy of data. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; if (info->index.sym == 0) { |
bddb12b32 kernel/module.c: ... |
2545 2546 |
pr_warn("%s: module has no symbols (stripped?) ", mod->name); |
3264d3f9d module: add load_... |
2547 2548 |
return ERR_PTR(-ENOEXEC); } |
49668688d module: pass load... |
2549 |
info->index.pcpu = find_pcpusec(info); |
3264d3f9d module: add load_... |
2550 |
|
3264d3f9d module: add load_... |
2551 2552 2553 2554 2555 |
/* Check module struct version now, before we try to use module. */ if (!check_modstruct_version(info->sechdrs, info->index.vers, mod)) return ERR_PTR(-ENOEXEC); return mod; |
3264d3f9d module: add load_... |
2556 |
} |
2f3238aeb module: add flags... |
2557 |
static int check_modinfo(struct module *mod, struct load_info *info, int flags) |
40dd2560e module: refactor ... |
2558 |
{ |
49668688d module: pass load... |
2559 |
const char *modmagic = get_modinfo(info, "vermagic"); |
40dd2560e module: refactor ... |
2560 |
int err; |
2f3238aeb module: add flags... |
2561 2562 |
if (flags & MODULE_INIT_IGNORE_VERMAGIC) modmagic = NULL; |
40dd2560e module: refactor ... |
2563 2564 2565 2566 2567 |
/* This is allowed: modprobe --force will invalidate it. */ if (!modmagic) { err = try_to_force_load(mod, "bad vermagic"); if (err) return err; |
49668688d module: pass load... |
2568 |
} else if (!same_magic(modmagic, vermagic, info->index.vers)) { |
bddb12b32 kernel/module.c: ... |
2569 2570 |
pr_err("%s: version magic '%s' should be '%s' ", |
40dd2560e module: refactor ... |
2571 2572 2573 |
mod->name, modmagic, vermagic); return -ENOEXEC; } |
2449b8ba0 module,bug: Add T... |
2574 |
if (!get_modinfo(info, "intree")) |
373d4d099 taint: add explic... |
2575 |
add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK); |
2449b8ba0 module,bug: Add T... |
2576 |
|
49668688d module: pass load... |
2577 |
if (get_modinfo(info, "staging")) { |
373d4d099 taint: add explic... |
2578 |
add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK); |
bddb12b32 kernel/module.c: ... |
2579 2580 2581 |
pr_warn("%s: module is from the staging directory, the quality " "is unknown, you have been warned. ", mod->name); |
40dd2560e module: refactor ... |
2582 |
} |
22e268ebe module: refactor ... |
2583 2584 |
/* Set up license info based on the info section */ |
49668688d module: pass load... |
2585 |
set_license(mod, get_modinfo(info, "license")); |
22e268ebe module: refactor ... |
2586 |
|
40dd2560e module: refactor ... |
2587 2588 |
return 0; } |
eb3057df7 kernel: add suppo... |
2589 |
static int find_module_sections(struct module *mod, struct load_info *info) |
f91a13bb9 module: refactor ... |
2590 |
{ |
49668688d module: pass load... |
2591 |
mod->kp = section_objs(info, "__param", |
f91a13bb9 module: refactor ... |
2592 |
sizeof(*mod->kp), &mod->num_kp); |
49668688d module: pass load... |
2593 |
mod->syms = section_objs(info, "__ksymtab", |
f91a13bb9 module: refactor ... |
2594 |
sizeof(*mod->syms), &mod->num_syms); |
49668688d module: pass load... |
2595 2596 |
mod->crcs = section_addr(info, "__kcrctab"); mod->gpl_syms = section_objs(info, "__ksymtab_gpl", |
f91a13bb9 module: refactor ... |
2597 2598 |
sizeof(*mod->gpl_syms), &mod->num_gpl_syms); |
49668688d module: pass load... |
2599 2600 |
mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(info, |
f91a13bb9 module: refactor ... |
2601 2602 2603 |
"__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); |
49668688d module: pass load... |
2604 |
mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); |
f91a13bb9 module: refactor ... |
2605 2606 |
#ifdef CONFIG_UNUSED_SYMBOLS |
49668688d module: pass load... |
2607 |
mod->unused_syms = section_objs(info, "__ksymtab_unused", |
f91a13bb9 module: refactor ... |
2608 2609 |
sizeof(*mod->unused_syms), &mod->num_unused_syms); |
49668688d module: pass load... |
2610 2611 |
mod->unused_crcs = section_addr(info, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", |
f91a13bb9 module: refactor ... |
2612 2613 |
sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); |
49668688d module: pass load... |
2614 |
mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); |
f91a13bb9 module: refactor ... |
2615 2616 |
#endif #ifdef CONFIG_CONSTRUCTORS |
49668688d module: pass load... |
2617 |
mod->ctors = section_objs(info, ".ctors", |
f91a13bb9 module: refactor ... |
2618 |
sizeof(*mod->ctors), &mod->num_ctors); |
eb3057df7 kernel: add suppo... |
2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 |
if (!mod->ctors) mod->ctors = section_objs(info, ".init_array", sizeof(*mod->ctors), &mod->num_ctors); else if (find_sec(info, ".init_array")) { /* * This shouldn't happen with same compiler and binutils * building all parts of the module. */ printk(KERN_WARNING "%s: has both .ctors and .init_array. ", mod->name); return -EINVAL; } |
f91a13bb9 module: refactor ... |
2632 2633 2634 |
#endif #ifdef CONFIG_TRACEPOINTS |
654986462 tracepoints: Fix ... |
2635 2636 2637 |
mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); |
f91a13bb9 module: refactor ... |
2638 |
#endif |
bf5438fca jump label: Base ... |
2639 2640 2641 2642 2643 |
#ifdef HAVE_JUMP_LABEL mod->jump_entries = section_objs(info, "__jump_table", sizeof(*mod->jump_entries), &mod->num_jump_entries); #endif |
f91a13bb9 module: refactor ... |
2644 |
#ifdef CONFIG_EVENT_TRACING |
49668688d module: pass load... |
2645 |
mod->trace_events = section_objs(info, "_ftrace_events", |
f91a13bb9 module: refactor ... |
2646 2647 |
sizeof(*mod->trace_events), &mod->num_trace_events); |
f91a13bb9 module: refactor ... |
2648 |
#endif |
13b9b6e74 tracing: Fix modu... |
2649 2650 2651 2652 |
#ifdef CONFIG_TRACING mod->trace_bprintk_fmt_start = section_objs(info, "__trace_printk_fmt", sizeof(*mod->trace_bprintk_fmt_start), &mod->num_trace_bprintk_fmt); |
13b9b6e74 tracing: Fix modu... |
2653 |
#endif |
f91a13bb9 module: refactor ... |
2654 2655 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |
49668688d module: pass load... |
2656 |
mod->ftrace_callsites = section_objs(info, "__mcount_loc", |
f91a13bb9 module: refactor ... |
2657 2658 2659 |
sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
22e268ebe module: refactor ... |
2660 |
|
811d66a0e module: group pos... |
2661 2662 |
mod->extable = section_objs(info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); |
49668688d module: pass load... |
2663 |
if (section_addr(info, "__obsparm")) |
bddb12b32 kernel/module.c: ... |
2664 2665 |
pr_warn("%s: Ignoring obsolete parameters ", mod->name); |
811d66a0e module: group pos... |
2666 2667 2668 |
info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); |
eb3057df7 kernel: add suppo... |
2669 2670 |
return 0; |
f91a13bb9 module: refactor ... |
2671 |
} |
49668688d module: pass load... |
2672 |
static int move_module(struct module *mod, struct load_info *info) |
65b8a9b4d module: refactor ... |
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 |
{ int i; void *ptr; /* Do the allocs. */ ptr = module_alloc_update_bounds(mod->core_size); /* * The pointer to this block is stored in the module structure * which is inside the block. Just mark it as not being a * leak. */ kmemleak_not_leak(ptr); if (!ptr) |
d913188c7 module: layout_an... |
2686 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
2687 2688 2689 |
memset(ptr, 0, mod->core_size); mod->module_core = ptr; |
82fab442f modules: don't ha... |
2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 |
if (mod->init_size) { ptr = module_alloc_update_bounds(mod->init_size); /* * The pointer to this block is stored in the module structure * which is inside the block. This block doesn't need to be * scanned as it contains data and code that will be freed * after the module is initialized. */ kmemleak_ignore(ptr); if (!ptr) { module_free(mod, mod->module_core); return -ENOMEM; } memset(ptr, 0, mod->init_size); mod->module_init = ptr; } else mod->module_init = NULL; |
65b8a9b4d module: refactor ... |
2707 2708 |
/* Transfer each section which specifies SHF_ALLOC */ |
5e1241692 module: replace D... |
2709 2710 |
pr_debug("final section addresses: "); |
49668688d module: pass load... |
2711 |
for (i = 0; i < info->hdr->e_shnum; i++) { |
65b8a9b4d module: refactor ... |
2712 |
void *dest; |
49668688d module: pass load... |
2713 |
Elf_Shdr *shdr = &info->sechdrs[i]; |
65b8a9b4d module: refactor ... |
2714 |
|
49668688d module: pass load... |
2715 |
if (!(shdr->sh_flags & SHF_ALLOC)) |
65b8a9b4d module: refactor ... |
2716 |
continue; |
49668688d module: pass load... |
2717 |
if (shdr->sh_entsize & INIT_OFFSET_MASK) |
65b8a9b4d module: refactor ... |
2718 |
dest = mod->module_init |
49668688d module: pass load... |
2719 |
+ (shdr->sh_entsize & ~INIT_OFFSET_MASK); |
65b8a9b4d module: refactor ... |
2720 |
else |
49668688d module: pass load... |
2721 |
dest = mod->module_core + shdr->sh_entsize; |
65b8a9b4d module: refactor ... |
2722 |
|
49668688d module: pass load... |
2723 2724 |
if (shdr->sh_type != SHT_NOBITS) memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); |
65b8a9b4d module: refactor ... |
2725 |
/* Update sh_addr to point to copy in image. */ |
49668688d module: pass load... |
2726 |
shdr->sh_addr = (unsigned long)dest; |
5e1241692 module: replace D... |
2727 2728 2729 |
pr_debug("\t0x%lx %s ", (long)shdr->sh_addr, info->secstrings + shdr->sh_name); |
65b8a9b4d module: refactor ... |
2730 |
} |
d913188c7 module: layout_an... |
2731 2732 |
return 0; |
65b8a9b4d module: refactor ... |
2733 |
} |
49668688d module: pass load... |
2734 |
static int check_module_license_and_versions(struct module *mod) |
22e268ebe module: refactor ... |
2735 2736 2737 2738 2739 2740 2741 |
{ /* * ndiswrapper is under GPL by itself, but loads proprietary modules. * Don't use add_taint_module(), as it would prevent ndiswrapper from * using GPL-only symbols it needs. */ if (strcmp(mod->name, "ndiswrapper") == 0) |
373d4d099 taint: add explic... |
2742 |
add_taint(TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2743 2744 2745 |
/* driverloader was caught wrongly pretending to be under GPL */ if (strcmp(mod->name, "driverloader") == 0) |
373d4d099 taint: add explic... |
2746 2747 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2748 |
|
c99af3752 module: taint ker... |
2749 2750 |
/* lve claims to be GPL but upstream won't provide source */ if (strcmp(mod->name, "lve") == 0) |
373d4d099 taint: add explic... |
2751 2752 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
c99af3752 module: taint ker... |
2753 |
|
22e268ebe module: refactor ... |
2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 |
#ifdef CONFIG_MODVERSIONS if ((mod->num_syms && !mod->crcs) || (mod->num_gpl_syms && !mod->gpl_crcs) || (mod->num_gpl_future_syms && !mod->gpl_future_crcs) #ifdef CONFIG_UNUSED_SYMBOLS || (mod->num_unused_syms && !mod->unused_crcs) || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs) #endif ) { return try_to_force_load(mod, "no versions for exported symbols"); } #endif return 0; } static void flush_module_icache(const struct module *mod) { mm_segment_t old_fs; /* flush the icache in correct context */ old_fs = get_fs(); set_fs(KERNEL_DS); /* * Flush the instruction cache, since we've played with text. * Do it before processing of module parameters, so the module * can provide parameter accessor functions of its own. */ if (mod->module_init) flush_icache_range((unsigned long)mod->module_init, (unsigned long)mod->module_init + mod->init_size); flush_icache_range((unsigned long)mod->module_core, (unsigned long)mod->module_core + mod->core_size); set_fs(old_fs); } |
74e08fcf7 modules: add defa... |
2792 2793 2794 2795 2796 2797 2798 |
int __weak module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } |
2f3238aeb module: add flags... |
2799 |
static struct module *layout_and_allocate(struct load_info *info, int flags) |
1da177e4c Linux-2.6.12-rc2 |
2800 |
{ |
d913188c7 module: layout_an... |
2801 |
/* Module within temporary copy. */ |
1da177e4c Linux-2.6.12-rc2 |
2802 |
struct module *mod; |
d913188c7 module: layout_an... |
2803 |
int err; |
3ae91c21d module: fix up CO... |
2804 |
|
2f3238aeb module: add flags... |
2805 |
mod = setup_load_info(info, flags); |
d913188c7 module: layout_an... |
2806 2807 |
if (IS_ERR(mod)) return mod; |
1da177e4c Linux-2.6.12-rc2 |
2808 |
|
2f3238aeb module: add flags... |
2809 |
err = check_modinfo(mod, info, flags); |
40dd2560e module: refactor ... |
2810 2811 |
if (err) return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2812 |
|
1da177e4c Linux-2.6.12-rc2 |
2813 |
/* Allow arches to frob section contents and sizes. */ |
49668688d module: pass load... |
2814 2815 |
err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod); |
1da177e4c Linux-2.6.12-rc2 |
2816 |
if (err < 0) |
8d8022e8a module: do percpu... |
2817 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2818 |
|
8d8022e8a module: do percpu... |
2819 2820 |
/* We will do a special allocation for per-cpu sections later. */ info->sechdrs[info->index.pcpu].sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
2821 2822 2823 2824 |
/* Determine total sizes, and put offsets in sh_entsize. For now this is done generically; there doesn't appear to be any special cases for the architectures. */ |
49668688d module: pass load... |
2825 |
layout_sections(mod, info); |
49668688d module: pass load... |
2826 |
layout_symtab(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
2827 |
|
65b8a9b4d module: refactor ... |
2828 |
/* Allocate and move to the final place */ |
49668688d module: pass load... |
2829 |
err = move_module(mod, info); |
d913188c7 module: layout_an... |
2830 |
if (err) |
8d8022e8a module: do percpu... |
2831 |
return ERR_PTR(err); |
d913188c7 module: layout_an... |
2832 2833 2834 |
/* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; |
49668688d module: pass load... |
2835 |
kmemleak_load_module(mod, info); |
d913188c7 module: layout_an... |
2836 |
return mod; |
d913188c7 module: layout_an... |
2837 2838 2839 2840 2841 |
} /* mod is no longer valid after this! */ static void module_deallocate(struct module *mod, struct load_info *info) { |
d913188c7 module: layout_an... |
2842 2843 2844 2845 |
percpu_modfree(mod); module_free(mod, mod->module_init); module_free(mod, mod->module_core); } |
74e08fcf7 modules: add defa... |
2846 2847 2848 2849 2850 2851 |
int __weak module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } |
811d66a0e module: group pos... |
2852 2853 |
static int post_relocation(struct module *mod, const struct load_info *info) { |
51f3d0f47 module: cleanup c... |
2854 |
/* Sort exception table now relocations are done. */ |
811d66a0e module: group pos... |
2855 2856 2857 2858 2859 |
sort_extable(mod->extable, mod->extable + mod->num_exentries); /* Copy relocated percpu area over. */ percpu_modcopy(mod, (void *)info->sechdrs[info->index.pcpu].sh_addr, info->sechdrs[info->index.pcpu].sh_size); |
51f3d0f47 module: cleanup c... |
2860 |
/* Setup kallsyms-specific fields. */ |
811d66a0e module: group pos... |
2861 2862 2863 2864 2865 |
add_kallsyms(mod, info); /* Arch-specific module finalizing. */ return module_finalize(info->hdr, info->sechdrs, mod); } |
9bb9c3be5 module: wait when... |
2866 2867 2868 2869 2870 2871 2872 |
/* Is this module of this name done loading? No locks held. */ static bool finished_loading(const char *name) { struct module *mod; bool ret; mutex_lock(&module_mutex); |
4f6de4d51 module: don't mod... |
2873 |
mod = find_module_all(name, strlen(name), true); |
0d21b0e34 module: add new s... |
2874 2875 |
ret = !mod || mod->state == MODULE_STATE_LIVE || mod->state == MODULE_STATE_GOING; |
9bb9c3be5 module: wait when... |
2876 2877 2878 2879 |
mutex_unlock(&module_mutex); return ret; } |
34e1169d9 module: add sysca... |
2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 |
/* Call module constructors. */ static void do_mod_ctors(struct module *mod) { #ifdef CONFIG_CONSTRUCTORS unsigned long i; for (i = 0; i < mod->num_ctors; i++) mod->ctors[i](); #endif } /* This is where the real work happens */ static int do_init_module(struct module *mod) { int ret = 0; |
774a1221e module, async: as... |
2895 2896 2897 2898 2899 |
/* * We want to find out whether @mod uses async during init. Clear * PF_USED_ASYNC. async_schedule*() will set it. */ current->flags &= ~PF_USED_ASYNC; |
34e1169d9 module: add sysca... |
2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); /* Set RO and NX regions for core */ set_section_ro_nx(mod->module_core, mod->core_text_size, mod->core_ro_size, mod->core_size); /* Set RO and NX regions for init */ set_section_ro_nx(mod->module_init, mod->init_text_size, mod->init_ro_size, mod->init_size); do_mod_ctors(mod); /* Start the module */ if (mod->init != NULL) ret = do_one_initcall(mod->init); if (ret < 0) { /* Init routine failed: abort. Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; synchronize_sched(); module_put(mod); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); free_module(mod); wake_up_all(&module_wq); return ret; } if (ret > 0) { |
bddb12b32 kernel/module.c: ... |
2932 2933 2934 2935 2936 2937 |
pr_warn("%s: '%s'->init suspiciously returned %d, it should " "follow 0/-E convention " "%s: loading module anyway... ", __func__, mod->name, ret, __func__); |
34e1169d9 module: add sysca... |
2938 2939 2940 2941 2942 2943 2944 |
dump_stack(); } /* Now it's a first class citizen! */ mod->state = MODULE_STATE_LIVE; blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_LIVE, mod); |
774a1221e module, async: as... |
2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 |
/* * We need to finish all async code before the module init sequence * is done. This has potential to deadlock. For example, a newly * detected block device can trigger request_module() of the * default iosched from async probing task. Once userland helper * reaches here, async_synchronize_full() will wait on the async * task waiting on request_module() and deadlock. * * This deadlock is avoided by perfomring async_synchronize_full() * iff module init queued any async jobs. This isn't a full * solution as it will deadlock the same if module loading from * async jobs nests more than once; however, due to the various * constraints, this hack seems to be the best option for now. * Please refer to the following thread for details. * * http://thread.gmane.org/gmane.linux.kernel/1420814 */ if (current->flags & PF_USED_ASYNC) async_synchronize_full(); |
34e1169d9 module: add sysca... |
2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 |
mutex_lock(&module_mutex); /* Drop initial reference. */ module_put(mod); trim_init_extable(mod); #ifdef CONFIG_KALLSYMS mod->num_symtab = mod->core_num_syms; mod->symtab = mod->core_symtab; mod->strtab = mod->core_strtab; #endif unset_module_init_ro_nx(mod); module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; mod->init_ro_size = 0; mod->init_text_size = 0; mutex_unlock(&module_mutex); wake_up_all(&module_wq); return 0; } static int may_init_module(void) { if (!capable(CAP_SYS_MODULE) || modules_disabled) return -EPERM; return 0; } |
a3535c7e4 module: clean up ... |
2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 |
/* * We try to place it in the list now to make sure it's unique before * we dedicate too many resources. In particular, temporary percpu * memory exhaustion. */ static int add_unformed_module(struct module *mod) { int err; struct module *old; mod->state = MODULE_STATE_UNFORMED; again: mutex_lock(&module_mutex); |
4f6de4d51 module: don't mod... |
3007 3008 |
old = find_module_all(mod->name, strlen(mod->name), true); if (old != NULL) { |
a3535c7e4 module: clean up ... |
3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 |
if (old->state == MODULE_STATE_COMING || old->state == MODULE_STATE_UNFORMED) { /* Wait in case it fails to load. */ mutex_unlock(&module_mutex); err = wait_event_interruptible(module_wq, finished_loading(mod->name)); if (err) goto out_unlocked; goto again; } err = -EEXIST; goto out; } list_add_rcu(&mod->list, &modules); err = 0; out: mutex_unlock(&module_mutex); out_unlocked: return err; } static int complete_formation(struct module *mod, struct load_info *info) { int err; mutex_lock(&module_mutex); /* Find duplicate symbols (must be called under lock). */ err = verify_export_symbols(mod); if (err < 0) goto out; /* This relies on module_mutex for list integrity. */ module_bug_finalize(info->hdr, info->sechdrs, mod); /* Mark state as coming so strong_try_module_get() ignores us, * but kallsyms etc. can see us. */ mod->state = MODULE_STATE_COMING; out: mutex_unlock(&module_mutex); return err; } |
54041d8a7 modules: don't fa... |
3053 3054 3055 3056 |
static int unknown_module_param_cb(char *param, char *val, const char *modname) { /* Check for magic 'dyndbg' arg */ int ret = ddebug_dyndbg_module_param_cb(param, val, modname); |
bddb12b32 kernel/module.c: ... |
3057 3058 3059 |
if (ret != 0) pr_warn("%s: unknown parameter '%s' ignored ", modname, param); |
54041d8a7 modules: don't fa... |
3060 3061 |
return 0; } |
d913188c7 module: layout_an... |
3062 3063 |
/* Allocate and load the module: note that size of section 0 is always zero, and we rely on this for optional sections. */ |
2f3238aeb module: add flags... |
3064 3065 |
static int load_module(struct load_info *info, const char __user *uargs, int flags) |
d913188c7 module: layout_an... |
3066 |
{ |
a3535c7e4 module: clean up ... |
3067 |
struct module *mod; |
d913188c7 module: layout_an... |
3068 |
long err; |
d913188c7 module: layout_an... |
3069 |
|
34e1169d9 module: add sysca... |
3070 3071 3072 |
err = module_sig_check(info); if (err) goto free_copy; |
d913188c7 module: layout_an... |
3073 |
|
34e1169d9 module: add sysca... |
3074 |
err = elf_header_check(info); |
d913188c7 module: layout_an... |
3075 |
if (err) |
34e1169d9 module: add sysca... |
3076 |
goto free_copy; |
d913188c7 module: layout_an... |
3077 3078 |
/* Figure out module layout, and allocate all the memory. */ |
2f3238aeb module: add flags... |
3079 |
mod = layout_and_allocate(info, flags); |
65b8a9b4d module: refactor ... |
3080 3081 |
if (IS_ERR(mod)) { err = PTR_ERR(mod); |
d913188c7 module: layout_an... |
3082 |
goto free_copy; |
1da177e4c Linux-2.6.12-rc2 |
3083 |
} |
1da177e4c Linux-2.6.12-rc2 |
3084 |
|
a3535c7e4 module: clean up ... |
3085 3086 3087 |
/* Reserve our place in the list. */ err = add_unformed_module(mod); if (err) |
1fb9341ac module: put modul... |
3088 |
goto free_module; |
1fb9341ac module: put modul... |
3089 |
|
106a4ee25 module: signature... |
3090 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
3091 |
mod->sig_ok = info->sig_ok; |
64748a2c9 module: printk me... |
3092 |
if (!mod->sig_ok) { |
bddb12b32 kernel/module.c: ... |
3093 3094 3095 3096 |
pr_notice_once("%s: module verification failed: signature " "and/or required key missing - tainting " "kernel ", mod->name); |
66cc69e34 Fix: module signa... |
3097 |
add_taint_module(mod, TAINT_UNSIGNED_MODULE, LOCKDEP_STILL_OK); |
64748a2c9 module: printk me... |
3098 |
} |
106a4ee25 module: signature... |
3099 |
#endif |
8d8022e8a module: do percpu... |
3100 |
/* To avoid stressing percpu allocator, do this once we're unique. */ |
9eb76d779 module: cleanup c... |
3101 |
err = percpu_modalloc(mod, info); |
8d8022e8a module: do percpu... |
3102 3103 |
if (err) goto unlink_mod; |
49668688d module: pass load... |
3104 |
/* Now module is in final location, initialize linked lists, etc. */ |
9f85a4bbb module: refactor ... |
3105 3106 |
err = module_unload_init(mod); if (err) |
1fb9341ac module: put modul... |
3107 |
goto unlink_mod; |
1da177e4c Linux-2.6.12-rc2 |
3108 |
|
22e268ebe module: refactor ... |
3109 3110 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
eb3057df7 kernel: add suppo... |
3111 3112 3113 |
err = find_module_sections(mod, info); if (err) goto free_unload; |
9b37ccfc6 module: allow ndi... |
3114 |
|
49668688d module: pass load... |
3115 |
err = check_module_license_and_versions(mod); |
22e268ebe module: refactor ... |
3116 3117 |
if (err) goto free_unload; |
9841d61d7 [PATCH] Add taint... |
3118 |
|
c988d2b28 [PATCH] modules: ... |
3119 |
/* Set up MODINFO_ATTR fields */ |
34e1169d9 module: add sysca... |
3120 |
setup_modinfo(mod, info); |
c988d2b28 [PATCH] modules: ... |
3121 |
|
1da177e4c Linux-2.6.12-rc2 |
3122 |
/* Fix up syms, so that st_value is a pointer to location. */ |
34e1169d9 module: add sysca... |
3123 |
err = simplify_symbols(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3124 |
if (err < 0) |
d913188c7 module: layout_an... |
3125 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3126 |
|
34e1169d9 module: add sysca... |
3127 |
err = apply_relocations(mod, info); |
22e268ebe module: refactor ... |
3128 |
if (err < 0) |
d913188c7 module: layout_an... |
3129 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3130 |
|
34e1169d9 module: add sysca... |
3131 |
err = post_relocation(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3132 |
if (err < 0) |
d913188c7 module: layout_an... |
3133 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3134 |
|
22e268ebe module: refactor ... |
3135 |
flush_module_icache(mod); |
378bac820 [PATCH] flush ica... |
3136 |
|
6526c534b module: move modu... |
3137 3138 3139 3140 3141 3142 |
/* Now copy in args */ mod->args = strndup_user(uargs, ~0UL >> 1); if (IS_ERR(mod->args)) { err = PTR_ERR(mod->args); goto free_arch_cleanup; } |
8d3b33f67 [PATCH] Remove MO... |
3143 |
|
34e1169d9 module: add sysca... |
3144 |
dynamic_debug_setup(info->debug, info->num_debug); |
ff49d74ad module: initializ... |
3145 |
|
a949ae560 ftrace/module: Ha... |
3146 3147 |
/* Ftrace init must be called in the MODULE_STATE_UNFORMED state */ ftrace_module_init(mod); |
a3535c7e4 module: clean up ... |
3148 3149 3150 |
/* Finally it's fully formed, ready to start executing. */ err = complete_formation(mod, info); if (err) |
1fb9341ac module: put modul... |
3151 |
goto ddebug_cleanup; |
be593f4ce module: verify_ex... |
3152 |
|
51f3d0f47 module: cleanup c... |
3153 |
/* Module is ready to execute: parsing args may do that. */ |
026cee008 params: <level>_i... |
3154 |
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, |
54041d8a7 modules: don't fa... |
3155 |
-32768, 32767, unknown_module_param_cb); |
1da177e4c Linux-2.6.12-rc2 |
3156 |
if (err < 0) |
1fb9341ac module: put modul... |
3157 |
goto bug_cleanup; |
1da177e4c Linux-2.6.12-rc2 |
3158 |
|
51f3d0f47 module: cleanup c... |
3159 |
/* Link in to syfs. */ |
34e1169d9 module: add sysca... |
3160 |
err = mod_sysfs_setup(mod, info, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
3161 |
if (err < 0) |
1fb9341ac module: put modul... |
3162 |
goto bug_cleanup; |
80a3d1bb4 module: move sysf... |
3163 |
|
48fd11880 module: Fix perfo... |
3164 |
/* Get rid of temporary copy. */ |
34e1169d9 module: add sysca... |
3165 |
free_copy(info); |
1da177e4c Linux-2.6.12-rc2 |
3166 3167 |
/* Done! */ |
51f3d0f47 module: cleanup c... |
3168 |
trace_module_load(mod); |
34e1169d9 module: add sysca... |
3169 3170 |
return do_init_module(mod); |
1da177e4c Linux-2.6.12-rc2 |
3171 |
|
1fb9341ac module: put modul... |
3172 3173 |
bug_cleanup: /* module_bug_cleanup needs module_mutex protection */ |
75676500f module: make lock... |
3174 |
mutex_lock(&module_mutex); |
5336377d6 modules: Fix modu... |
3175 |
module_bug_cleanup(mod); |
ee61abb32 module: fix missi... |
3176 |
mutex_unlock(&module_mutex); |
a3535c7e4 module: clean up ... |
3177 |
ddebug_cleanup: |
1fb9341ac module: put modul... |
3178 |
dynamic_debug_remove(info->debug); |
e91defa26 module: don't use... |
3179 |
synchronize_sched(); |
6526c534b module: move modu... |
3180 3181 |
kfree(mod->args); free_arch_cleanup: |
1da177e4c Linux-2.6.12-rc2 |
3182 |
module_arch_cleanup(mod); |
d913188c7 module: layout_an... |
3183 |
free_modinfo: |
a263f7763 module: fix memor... |
3184 |
free_modinfo(mod); |
22e268ebe module: refactor ... |
3185 |
free_unload: |
1da177e4c Linux-2.6.12-rc2 |
3186 |
module_unload_free(mod); |
1fb9341ac module: put modul... |
3187 3188 3189 3190 3191 3192 |
unlink_mod: mutex_lock(&module_mutex); /* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); wake_up_all(&module_wq); mutex_unlock(&module_mutex); |
d913188c7 module: layout_an... |
3193 |
free_module: |
34e1169d9 module: add sysca... |
3194 |
module_deallocate(mod, info); |
d913188c7 module: layout_an... |
3195 |
free_copy: |
34e1169d9 module: add sysca... |
3196 3197 |
free_copy(info); return err; |
b99b87f70 kernel: construct... |
3198 |
} |
17da2bd90 [CVE-2009-0029] S... |
3199 3200 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
3201 |
{ |
34e1169d9 module: add sysca... |
3202 3203 |
int err; struct load_info info = { }; |
1da177e4c Linux-2.6.12-rc2 |
3204 |
|
34e1169d9 module: add sysca... |
3205 3206 3207 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3208 |
|
34e1169d9 module: add sysca... |
3209 3210 3211 |
pr_debug("init_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); |
1da177e4c Linux-2.6.12-rc2 |
3212 |
|
34e1169d9 module: add sysca... |
3213 3214 3215 |
err = copy_module_from_user(umod, len, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3216 |
|
2f3238aeb module: add flags... |
3217 |
return load_module(&info, uargs, 0); |
34e1169d9 module: add sysca... |
3218 |
} |
94462ad3b module: Move RO/N... |
3219 |
|
2f3238aeb module: add flags... |
3220 |
SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags) |
34e1169d9 module: add sysca... |
3221 3222 3223 |
{ int err; struct load_info info = { }; |
94462ad3b module: Move RO/N... |
3224 |
|
34e1169d9 module: add sysca... |
3225 3226 3227 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3228 |
|
2f3238aeb module: add flags... |
3229 3230 |
pr_debug("finit_module: fd=%d, uargs=%p, flags=%i ", fd, uargs, flags); |
6c5db22d2 modules: fix modu... |
3231 |
|
2f3238aeb module: add flags... |
3232 3233 3234 |
if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS |MODULE_INIT_IGNORE_VERMAGIC)) return -EINVAL; |
d6de2c80e async: Fix module... |
3235 |
|
34e1169d9 module: add sysca... |
3236 3237 3238 |
err = copy_module_from_fd(fd, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3239 |
|
2f3238aeb module: add flags... |
3240 |
return load_module(&info, uargs, flags); |
1da177e4c Linux-2.6.12-rc2 |
3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 |
} static inline int within(unsigned long addr, void *start, unsigned long size) { return ((void *)addr >= start && (void *)addr < start + size); } #ifdef CONFIG_KALLSYMS /* * This ignores the intensely annoying "mapping symbols" found * in ARM ELF files: $a, $t and $d. */ static inline int is_arm_mapping_symbol(const char *str) { |
22a8bdeb5 whitespace fixes:... |
3255 |
return str[0] == '$' && strchr("atd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 |
&& (str[2] == '\0' || str[2] == '.'); } static const char *get_ksymbol(struct module *mod, unsigned long addr, unsigned long *size, unsigned long *offset) { unsigned int i, best = 0; unsigned long nextval; /* At worse, next value is at end of module */ |
a06f6211e module: add withi... |
3268 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3269 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
3270 |
else |
1da177e4c Linux-2.6.12-rc2 |
3271 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; |
25985edce Fix common misspe... |
3272 |
/* Scan for closest preceding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
3273 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 |
for (i = 1; i < mod->num_symtab; i++) { if (mod->symtab[i].st_shndx == SHN_UNDEF) continue; /* We ignore unnamed symbols: they're uninformative * and inserted at a whim. */ if (mod->symtab[i].st_value <= addr && mod->symtab[i].st_value > mod->symtab[best].st_value && *(mod->strtab + mod->symtab[i].st_name) != '\0' && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name)) best = i; if (mod->symtab[i].st_value > addr && mod->symtab[i].st_value < nextval && *(mod->strtab + mod->symtab[i].st_name) != '\0' && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name)) nextval = mod->symtab[i].st_value; } if (!best) return NULL; |
ffb451227 Simplify kallsyms... |
3294 3295 3296 3297 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
3298 3299 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
3300 3301 |
/* For kallsyms to ask for address resolution. NULL means not found. Careful * not to lock to avoid deadlock on oopses, simply disable preemption. */ |
92dfc9dc7 fix "modules: mak... |
3302 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
3303 3304 3305 3306 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
3307 3308 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3309 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
3310 |
|
cb2a52052 modules: de-mutex... |
3311 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3312 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3313 3314 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3315 3316 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
3317 3318 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
3319 3320 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
3321 3322 |
} } |
6dd06c9fb module: make modu... |
3323 3324 3325 3326 3327 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
3328 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
3329 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
3330 |
} |
9d65cb4a1 Fix race between ... |
3331 3332 3333 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3334 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3335 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3336 3337 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3338 3339 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
9d65cb4a1 Fix race between ... |
3340 3341 3342 3343 3344 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
3345 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3346 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3347 3348 3349 3350 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3351 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3352 3353 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
3354 3355 3356 3357 |
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3358 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3359 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3360 3361 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3362 3363 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
a5c43dae7 Fix race between ... |
3364 3365 3366 3367 3368 3369 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
3370 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
3371 |
if (name) |
9281acea6 kallsyms: make KS... |
3372 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3373 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3374 3375 3376 3377 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3378 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3379 3380 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
3381 3382 |
int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, char *name, char *module_name, int *exported) |
1da177e4c Linux-2.6.12-rc2 |
3383 3384 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3385 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3386 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3387 3388 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3389 3390 3391 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
3392 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
3393 3394 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
3395 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
3396 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3397 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
3398 3399 3400 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
3401 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3402 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
3403 3404 3405 3406 3407 3408 3409 |
} static unsigned long mod_find_symname(struct module *mod, const char *name) { unsigned int i; for (i = 0; i < mod->num_symtab; i++) |
54e8ce463 [PATCH] Tell kall... |
3410 3411 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 |
return mod->symtab[i].st_value; return 0; } /* Look for this name: can be of form module:name. */ unsigned long module_kallsyms_lookup_name(const char *name) { struct module *mod; char *colon; unsigned long ret = 0; /* Don't lock: we're in enough trouble already. */ |
cb2a52052 modules: de-mutex... |
3424 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
3425 |
if ((colon = strchr(name, ':')) != NULL) { |
4f6de4d51 module: don't mod... |
3426 |
if ((mod = find_module_all(name, colon - name, false)) != NULL) |
1da177e4c Linux-2.6.12-rc2 |
3427 |
ret = mod_find_symname(mod, colon+1); |
1da177e4c Linux-2.6.12-rc2 |
3428 |
} else { |
0d21b0e34 module: add new s... |
3429 3430 3431 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3432 3433 |
if ((ret = mod_find_symname(mod, name)) != 0) break; |
0d21b0e34 module: add new s... |
3434 |
} |
1da177e4c Linux-2.6.12-rc2 |
3435 |
} |
cb2a52052 modules: de-mutex... |
3436 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3437 3438 |
return ret; } |
75a66614d Ksplice: Add func... |
3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 |
int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, unsigned long), void *data) { struct module *mod; unsigned int i; int ret; list_for_each_entry(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3449 3450 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
75a66614d Ksplice: Add func... |
3451 3452 3453 3454 3455 3456 3457 3458 3459 |
for (i = 0; i < mod->num_symtab; i++) { ret = fn(data, mod->strtab + mod->symtab[i].st_name, mod, mod->symtab[i].st_value); if (ret != 0) return ret; } } return 0; } |
1da177e4c Linux-2.6.12-rc2 |
3460 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
3461 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
3462 3463 |
{ int bx = 0; |
0d21b0e34 module: add new s... |
3464 |
BUG_ON(mod->state == MODULE_STATE_UNFORMED); |
21aa9280b debug: show being... |
3465 3466 3467 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
3468 |
buf[bx++] = '('; |
cca3e7073 modules: sysfs - ... |
3469 |
bx += module_flags_taint(mod, buf + bx); |
21aa9280b debug: show being... |
3470 3471 3472 3473 3474 3475 |
/* Show a - for module-is-being-unloaded */ if (mod->state == MODULE_STATE_GOING) buf[bx++] = '-'; /* Show a + for module-is-being-loaded */ if (mod->state == MODULE_STATE_COMING) buf[bx++] = '+'; |
fa3ba2e81 [PATCH] fix Modul... |
3476 3477 3478 3479 3480 3481 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 |
#ifdef CONFIG_PROC_FS /* Called by the /proc file system to return a list of modules. */ static void *m_start(struct seq_file *m, loff_t *pos) { mutex_lock(&module_mutex); return seq_list_start(&modules, *pos); } static void *m_next(struct seq_file *m, void *p, loff_t *pos) { return seq_list_next(p, &modules, pos); } static void m_stop(struct seq_file *m, void *p) { mutex_unlock(&module_mutex); } |
1da177e4c Linux-2.6.12-rc2 |
3499 3500 3501 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
3502 |
char buf[8]; |
0d21b0e34 module: add new s... |
3503 3504 3505 |
/* We always ignore unformed modules. */ if (mod->state == MODULE_STATE_UNFORMED) return 0; |
2f0f2a334 module: turn long... |
3506 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
3507 3508 3509 3510 3511 3512 3513 3514 3515 |
mod->name, mod->init_size + mod->core_size); print_unload_info(m, mod); /* Informative for users. */ seq_printf(m, " %s", mod->state == MODULE_STATE_GOING ? "Unloading": mod->state == MODULE_STATE_COMING ? "Loading": "Live"); /* Used by oprofile and other similar tools. */ |
9f36e2c44 printk: use %pK f... |
3516 |
seq_printf(m, " 0x%pK", mod->module_core); |
1da177e4c Linux-2.6.12-rc2 |
3517 |
|
fa3ba2e81 [PATCH] fix Modul... |
3518 3519 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
3520 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
3521 |
|
1da177e4c Linux-2.6.12-rc2 |
3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 |
seq_printf(m, " "); return 0; } /* Format: modulename size refcount deps address Where refcount is a number or -, and deps is a comma-separated list of depends or -. */ |
3b5d5c6b0 proc: move /proc/... |
3532 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
3533 3534 3535 3536 3537 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 |
static int modules_open(struct inode *inode, struct file *file) { return seq_open(file, &modules_op); } static const struct file_operations proc_modules_operations = { .open = modules_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int __init proc_modules_init(void) { proc_create("modules", 0, NULL, &proc_modules_operations); return 0; } module_init(proc_modules_init); #endif |
1da177e4c Linux-2.6.12-rc2 |
3557 3558 3559 |
/* Given an address, look for it in the module exception tables. */ const struct exception_table_entry *search_module_extables(unsigned long addr) { |
1da177e4c Linux-2.6.12-rc2 |
3560 3561 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
3562 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3563 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3564 3565 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3566 3567 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
3568 |
|
1da177e4c Linux-2.6.12-rc2 |
3569 3570 3571 3572 3573 3574 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
3575 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3576 3577 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
3578 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
3579 3580 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
3581 |
/* |
e610499e2 module: __module_... |
3582 3583 3584 3585 3586 |
* is_module_address - is this address inside a module? * @addr: the address to check. * * See is_module_text_address() if you simply want to see if the address * is code (not data). |
4d435f9d8 [PATCH] lockdep: ... |
3587 |
*/ |
e610499e2 module: __module_... |
3588 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
3589 |
{ |
e610499e2 module: __module_... |
3590 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
3591 |
|
24da1cbff modules: remove m... |
3592 |
preempt_disable(); |
e610499e2 module: __module_... |
3593 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
3594 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
3595 |
|
e610499e2 module: __module_... |
3596 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
3597 |
} |
e610499e2 module: __module_... |
3598 3599 3600 3601 3602 3603 3604 |
/* * __module_address - get the module which contains an address. * @addr: the address. * * Must be called with preempt disabled or module mutex held so that * module doesn't get freed during this. */ |
714f83d5d Merge branch 'tra... |
3605 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
3606 3607 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
3608 3609 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
0d21b0e34 module: add new s... |
3610 3611 3612 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
e610499e2 module: __module_... |
3613 3614 |
if (within_module_core(addr, mod) || within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3615 |
return mod; |
0d21b0e34 module: add new s... |
3616 |
} |
1da177e4c Linux-2.6.12-rc2 |
3617 3618 |
return NULL; } |
c6b378019 module: Export sy... |
3619 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
3620 |
|
e610499e2 module: __module_... |
3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 |
/* * is_module_text_address - is this address inside module code? * @addr: the address to check. * * See is_module_address() if you simply want to see if the address is * anywhere in a module. See kernel_text_address() for testing if an * address corresponds to kernel or module code. */ bool is_module_text_address(unsigned long addr) { bool ret; preempt_disable(); ret = __module_text_address(addr) != NULL; preempt_enable(); return ret; } /* * __module_text_address - get the module whose code contains an address. * @addr: the address. * * Must be called with preempt disabled or module mutex held so that * module doesn't get freed during this. */ struct module *__module_text_address(unsigned long addr) { struct module *mod = __module_address(addr); if (mod) { /* Make sure it's within the text section. */ if (!within(addr, mod->module_init, mod->init_text_size) && !within(addr, mod->module_core, mod->core_text_size)) mod = NULL; } return mod; } |
c6b378019 module: Export sy... |
3658 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
3659 |
|
1da177e4c Linux-2.6.12-rc2 |
3660 3661 3662 3663 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
3664 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
3665 |
|
b231125af printk: add KERN_... |
3666 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
3667 3668 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); |
0d21b0e34 module: add new s... |
3669 3670 3671 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
27bba4d6b module: use pr_cont |
3672 |
pr_cont(" %s%s", mod->name, module_flags(mod, buf)); |
0d21b0e34 module: add new s... |
3673 |
} |
d72b37513 Remove stop_machi... |
3674 |
preempt_enable(); |
e14af7eeb debug: track and ... |
3675 |
if (last_unloaded_module[0]) |
27bba4d6b module: use pr_cont |
3676 3677 3678 |
pr_cont(" [last unloaded: %s]", last_unloaded_module); pr_cont(" "); |
1da177e4c Linux-2.6.12-rc2 |
3679 |
} |
1da177e4c Linux-2.6.12-rc2 |
3680 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
3681 3682 3683 3684 3685 3686 |
/* Generate the signature for all relevant module structures here. * If these change, we don't want to try to parse the module. */ void module_layout(struct module *mod, struct modversion_info *ver, struct kernel_param *kp, struct kernel_symbol *ks, |
654986462 tracepoints: Fix ... |
3687 |
struct tracepoint * const *tp) |
8c8ef42ae module: include o... |
3688 3689 3690 |
{ } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
3691 |
#endif |