Blame view
kernel/module.c
116 KB
1a59d1b8e treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-or-later |
f71d20e96 [PATCH] Add EXPOR... |
2 |
/* |
1da177e4c Linux-2.6.12-rc2 |
3 |
Copyright (C) 2002 Richard Henderson |
51f3d0f47 module: cleanup c... |
4 |
Copyright (C) 2001 Rusty Russell, 2002, 2010 Rusty Russell IBM. |
1da177e4c Linux-2.6.12-rc2 |
5 |
|
1da177e4c Linux-2.6.12-rc2 |
6 |
*/ |
9984de1a5 kernel: Map most ... |
7 |
#include <linux/export.h> |
8a293be0d core: migrate exc... |
8 |
#include <linux/extable.h> |
1da177e4c Linux-2.6.12-rc2 |
9 |
#include <linux/moduleloader.h> |
c8424e776 MODSIGN: Export m... |
10 |
#include <linux/module_signature.h> |
af658dca2 tracing: Rename f... |
11 |
#include <linux/trace_events.h> |
1da177e4c Linux-2.6.12-rc2 |
12 |
#include <linux/init.h> |
ae84e3247 Simplify module_g... |
13 |
#include <linux/kallsyms.h> |
34e1169d9 module: add sysca... |
14 |
#include <linux/file.h> |
3b5d5c6b0 proc: move /proc/... |
15 |
#include <linux/fs.h> |
6d7601338 Add /sys/module/n... |
16 |
#include <linux/sysfs.h> |
9f1583339 [PATCH] use add_t... |
17 |
#include <linux/kernel.h> |
1da177e4c Linux-2.6.12-rc2 |
18 19 20 |
#include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/elf.h> |
3b5d5c6b0 proc: move /proc/... |
21 |
#include <linux/proc_fs.h> |
2e72d51b4 security: introdu... |
22 |
#include <linux/security.h> |
1da177e4c Linux-2.6.12-rc2 |
23 24 25 26 |
#include <linux/seq_file.h> #include <linux/syscalls.h> #include <linux/fcntl.h> #include <linux/rcupdate.h> |
c59ede7b7 [PATCH] move capa... |
27 |
#include <linux/capability.h> |
1da177e4c Linux-2.6.12-rc2 |
28 29 30 31 32 33 |
#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 ... |
34 |
#include <linux/sched.h> |
1da177e4c Linux-2.6.12-rc2 |
35 |
#include <linux/device.h> |
c988d2b28 [PATCH] modules: ... |
36 |
#include <linux/string.h> |
97d1f15b7 [PATCH] sem2mutex... |
37 |
#include <linux/mutex.h> |
d72b37513 Remove stop_machi... |
38 |
#include <linux/rculist.h> |
7c0f6ba68 Replace <asm/uacc... |
39 |
#include <linux/uaccess.h> |
1da177e4c Linux-2.6.12-rc2 |
40 |
#include <asm/cacheflush.h> |
563ec5cbc kernel/module.c: ... |
41 |
#include <linux/set_memory.h> |
eb8cdec4a nommu: add suppor... |
42 |
#include <asm/mmu_context.h> |
b817f6fef kbuild: check lic... |
43 |
#include <linux/license.h> |
6d7623943 modules: include ... |
44 |
#include <asm/sections.h> |
97e1c18e8 tracing: Kernel T... |
45 |
#include <linux/tracepoint.h> |
90d595fe5 ftrace: enable mc... |
46 |
#include <linux/ftrace.h> |
7e545d6ec livepatch/module:... |
47 |
#include <linux/livepatch.h> |
22a9d6456 async: Asynchrono... |
48 |
#include <linux/async.h> |
fbf59bc9d percpu: implement... |
49 |
#include <linux/percpu.h> |
4f2294b6d kmemleak: Add mod... |
50 |
#include <linux/kmemleak.h> |
bf5438fca jump label: Base ... |
51 |
#include <linux/jump_label.h> |
84e1c6bb3 x86: Add RO/NX pr... |
52 |
#include <linux/pfn.h> |
403ed2784 module: Use the b... |
53 |
#include <linux/bsearch.h> |
9d5059c95 dynamic_debug: on... |
54 |
#include <linux/dynamic_debug.h> |
ca86cad73 audit: log module... |
55 |
#include <linux/audit.h> |
2f3238aeb module: add flags... |
56 |
#include <uapi/linux/module.h> |
106a4ee25 module: signature... |
57 |
#include "module-internal.h" |
1da177e4c Linux-2.6.12-rc2 |
58 |
|
7ead8b831 tracing/events: A... |
59 60 |
#define CREATE_TRACE_POINTS #include <trace/events/module.h> |
1da177e4c Linux-2.6.12-rc2 |
61 62 63 |
#ifndef ARCH_SHF_SMALL #define ARCH_SHF_SMALL 0 #endif |
84e1c6bb3 x86: Add RO/NX pr... |
64 65 |
/* * Modules' sections will be aligned on page boundaries |
3b5be16c7 modules: page-ali... |
66 67 |
* to ensure complete separation of code and data, but * only when CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y |
84e1c6bb3 x86: Add RO/NX pr... |
68 |
*/ |
3b5be16c7 modules: page-ali... |
69 |
#ifdef CONFIG_ARCH_HAS_STRICT_MODULE_RWX |
84e1c6bb3 x86: Add RO/NX pr... |
70 |
# define debug_align(X) ALIGN(X, PAGE_SIZE) |
3b5be16c7 modules: page-ali... |
71 72 73 |
#else # define debug_align(X) (X) #endif |
84e1c6bb3 x86: Add RO/NX pr... |
74 |
|
1da177e4c Linux-2.6.12-rc2 |
75 76 |
/* 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... |
77 78 79 80 81 |
/* * Mutex protects: * 1) List of modules (also safely readable with preempt_disable), * 2) module_use links, * 3) module_addr_min/module_addr_max. |
e513cc1c0 module: Remove st... |
82 |
* (delete and add uses RCU list operations). */ |
c6b378019 module: Export sy... |
83 84 |
DEFINE_MUTEX(module_mutex); EXPORT_SYMBOL_GPL(module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
85 |
static LIST_HEAD(modules); |
67fc4e0cb kdb: core for kgd... |
86 |
|
1a7b7d922 modules: Use vmal... |
87 88 89 |
/* Work queue for freeing init sections in success case */ static struct work_struct init_free_wq; static struct llist_head init_free_list; |
6c9692e2d module: Make the ... |
90 |
#ifdef CONFIG_MODULES_TREE_LOOKUP |
106a4ee25 module: signature... |
91 |
|
93c2e105f module: Optimize ... |
92 93 94 95 |
/* * Use a latched RB-tree for __module_address(); this allows us to use * RCU-sched lookups of the address from any context. * |
6c9692e2d module: Make the ... |
96 97 98 |
* This is conditional on PERF_EVENTS || TRACING because those can really hit * __module_address() hard by doing a lot of stack unwinding; potentially from * NMI context. |
93c2e105f module: Optimize ... |
99 100 101 |
*/ static __always_inline unsigned long __mod_tree_val(struct latch_tree_node *n) |
106a4ee25 module: signature... |
102 |
{ |
7523e4dc5 module: use a str... |
103 |
struct module_layout *layout = container_of(n, struct module_layout, mtn.node); |
106a4ee25 module: signature... |
104 |
|
7523e4dc5 module: use a str... |
105 |
return (unsigned long)layout->base; |
93c2e105f module: Optimize ... |
106 107 108 109 |
} static __always_inline unsigned long __mod_tree_size(struct latch_tree_node *n) { |
7523e4dc5 module: use a str... |
110 |
struct module_layout *layout = container_of(n, struct module_layout, mtn.node); |
93c2e105f module: Optimize ... |
111 |
|
7523e4dc5 module: use a str... |
112 |
return (unsigned long)layout->size; |
93c2e105f module: Optimize ... |
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 |
} static __always_inline bool mod_tree_less(struct latch_tree_node *a, struct latch_tree_node *b) { return __mod_tree_val(a) < __mod_tree_val(b); } static __always_inline int mod_tree_comp(void *key, struct latch_tree_node *n) { unsigned long val = (unsigned long)key; unsigned long start, end; start = __mod_tree_val(n); if (val < start) return -1; end = start + __mod_tree_size(n); if (val >= end) return 1; |
106a4ee25 module: signature... |
134 |
|
106a4ee25 module: signature... |
135 136 |
return 0; } |
93c2e105f module: Optimize ... |
137 138 139 140 |
static const struct latch_tree_ops mod_tree_ops = { .less = mod_tree_less, .comp = mod_tree_comp, }; |
4f666546d module: Rework mo... |
141 142 143 144 145 146 |
static struct mod_tree_root { struct latch_tree_root root; unsigned long addr_min; unsigned long addr_max; } mod_tree __cacheline_aligned = { .addr_min = -1UL, |
106a4ee25 module: signature... |
147 |
}; |
106a4ee25 module: signature... |
148 |
|
4f666546d module: Rework mo... |
149 150 151 152 153 154 155 156 157 158 159 160 |
#define module_addr_min mod_tree.addr_min #define module_addr_max mod_tree.addr_max static noinline void __mod_tree_insert(struct mod_tree_node *node) { latch_tree_insert(&node->node, &mod_tree.root, &mod_tree_ops); } static void __mod_tree_remove(struct mod_tree_node *node) { latch_tree_erase(&node->node, &mod_tree.root, &mod_tree_ops); } |
93c2e105f module: Optimize ... |
161 162 163 164 165 166 167 |
/* * These modifications: insert, remove_init and remove; are serialized by the * module_mutex. */ static void mod_tree_insert(struct module *mod) { |
7523e4dc5 module: use a str... |
168 169 |
mod->core_layout.mtn.mod = mod; mod->init_layout.mtn.mod = mod; |
93c2e105f module: Optimize ... |
170 |
|
7523e4dc5 module: use a str... |
171 172 173 |
__mod_tree_insert(&mod->core_layout.mtn); if (mod->init_layout.size) __mod_tree_insert(&mod->init_layout.mtn); |
93c2e105f module: Optimize ... |
174 175 176 177 |
} static void mod_tree_remove_init(struct module *mod) { |
7523e4dc5 module: use a str... |
178 179 |
if (mod->init_layout.size) __mod_tree_remove(&mod->init_layout.mtn); |
93c2e105f module: Optimize ... |
180 181 182 183 |
} static void mod_tree_remove(struct module *mod) { |
7523e4dc5 module: use a str... |
184 |
__mod_tree_remove(&mod->core_layout.mtn); |
93c2e105f module: Optimize ... |
185 186 |
mod_tree_remove_init(mod); } |
6c9692e2d module: Make the ... |
187 |
static struct module *mod_find(unsigned long addr) |
93c2e105f module: Optimize ... |
188 189 |
{ struct latch_tree_node *ltn; |
4f666546d module: Rework mo... |
190 |
ltn = latch_tree_find((void *)addr, &mod_tree.root, &mod_tree_ops); |
93c2e105f module: Optimize ... |
191 192 193 194 195 |
if (!ltn) return NULL; return container_of(ltn, struct mod_tree_node, node)->mod; } |
6c9692e2d module: Make the ... |
196 |
#else /* MODULES_TREE_LOOKUP */ |
4f666546d module: Rework mo... |
197 |
static unsigned long module_addr_min = -1UL, module_addr_max = 0; |
6c9692e2d module: Make the ... |
198 199 200 201 202 203 204 |
static void mod_tree_insert(struct module *mod) { } static void mod_tree_remove_init(struct module *mod) { } static void mod_tree_remove(struct module *mod) { } static struct module *mod_find(unsigned long addr) { struct module *mod; |
4c50665fc modules: lockdep:... |
205 206 |
list_for_each_entry_rcu(mod, &modules, list, lockdep_is_held(&module_mutex)) { |
6c9692e2d module: Make the ... |
207 208 209 210 211 212 213 214 |
if (within_module(addr, mod)) return mod; } return NULL; } #endif /* MODULES_TREE_LOOKUP */ |
4f666546d module: Rework mo... |
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 |
/* * Bounds of module text, for speeding up __module_address. * Protected by module_mutex. */ static void __mod_update_bounds(void *base, unsigned int size) { unsigned long min = (unsigned long)base; unsigned long max = min + size; if (min < module_addr_min) module_addr_min = min; if (max > module_addr_max) module_addr_max = max; } static void mod_update_bounds(struct module *mod) { |
7523e4dc5 module: use a str... |
232 233 234 |
__mod_update_bounds(mod->core_layout.base, mod->core_layout.size); if (mod->init_layout.size) __mod_update_bounds(mod->init_layout.base, mod->init_layout.size); |
4f666546d module: Rework mo... |
235 |
} |
67fc4e0cb kdb: core for kgd... |
236 237 238 |
#ifdef CONFIG_KGDB_KDB struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */ #endif /* CONFIG_KGDB_KDB */ |
0be964be0 module: Sanitize ... |
239 240 241 242 243 244 245 246 247 248 |
static void module_assert_mutex(void) { lockdep_assert_held(&module_mutex); } static void module_assert_mutex_or_preempt(void) { #ifdef CONFIG_LOCKDEP if (unlikely(!debug_locks)) return; |
9502514f2 module: Do a WARN... |
249 |
WARN_ON_ONCE(!rcu_read_lock_sched_held() && |
0be964be0 module: Sanitize ... |
250 251 252 |
!lockdep_is_held(&module_mutex)); #endif } |
6727bb9c6 kernel/module.c: ... |
253 |
static bool sig_enforce = IS_ENABLED(CONFIG_MODULE_SIG_FORCE); |
106a4ee25 module: signature... |
254 |
module_param(sig_enforce, bool_enable_only, 0644); |
1da177e4c Linux-2.6.12-rc2 |
255 |
|
fda784e50 module: export mo... |
256 257 258 259 260 261 262 263 264 |
/* * Export sig_enforce kernel cmdline parameter to allow other subsystems rely * on that instead of directly to CONFIG_MODULE_SIG_FORCE config. */ bool is_module_sig_enforced(void) { return sig_enforce; } EXPORT_SYMBOL(is_module_sig_enforced); |
8db5da0b8 x86/ima: require ... |
265 266 267 268 |
void set_module_sig_enforced(void) { sig_enforce = true; } |
19e4529ee modules: Fix up b... |
269 270 |
/* Block module loading/unloading? */ int modules_disabled = 0; |
02608bef8 module: add kerne... |
271 |
core_param(nomodule, modules_disabled, bint, 0); |
19e4529ee modules: Fix up b... |
272 |
|
c9a3ba55b module: wait for ... |
273 274 |
/* Waiting for a module to finish initializing? */ static DECLARE_WAIT_QUEUE_HEAD(module_wq); |
e041c6834 [PATCH] Notifier ... |
275 |
static BLOCKING_NOTIFIER_HEAD(module_notify_list); |
1da177e4c Linux-2.6.12-rc2 |
276 |
|
6da0b5651 kernel:module Fix... |
277 |
int register_module_notifier(struct notifier_block *nb) |
1da177e4c Linux-2.6.12-rc2 |
278 |
{ |
e041c6834 [PATCH] Notifier ... |
279 |
return blocking_notifier_chain_register(&module_notify_list, nb); |
1da177e4c Linux-2.6.12-rc2 |
280 281 |
} EXPORT_SYMBOL(register_module_notifier); |
6da0b5651 kernel:module Fix... |
282 |
int unregister_module_notifier(struct notifier_block *nb) |
1da177e4c Linux-2.6.12-rc2 |
283 |
{ |
e041c6834 [PATCH] Notifier ... |
284 |
return blocking_notifier_chain_unregister(&module_notify_list, nb); |
1da177e4c Linux-2.6.12-rc2 |
285 286 |
} EXPORT_SYMBOL(unregister_module_notifier); |
71d9f5079 module: Fix a com... |
287 288 289 290 291 |
/* * We require a truly strong try_module_get(): 0 means success. * Otherwise an error is returned due to ongoing or failed * initialization etc. */ |
1da177e4c Linux-2.6.12-rc2 |
292 293 |
static inline int strong_try_module_get(struct module *mod) { |
0d21b0e34 module: add new s... |
294 |
BUG_ON(mod && mod->state == MODULE_STATE_UNFORMED); |
1da177e4c Linux-2.6.12-rc2 |
295 |
if (mod && mod->state == MODULE_STATE_COMING) |
c9a3ba55b module: wait for ... |
296 297 |
return -EBUSY; if (try_module_get(mod)) |
1da177e4c Linux-2.6.12-rc2 |
298 |
return 0; |
c9a3ba55b module: wait for ... |
299 300 |
else return -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
301 |
} |
373d4d099 taint: add explic... |
302 303 |
static inline void add_taint_module(struct module *mod, unsigned flag, enum lockdep_ok lockdep_ok) |
fa3ba2e81 [PATCH] fix Modul... |
304 |
{ |
373d4d099 taint: add explic... |
305 |
add_taint(flag, lockdep_ok); |
7fd8329ba taint/module: Cle... |
306 |
set_bit(flag, &mod->taints); |
fa3ba2e81 [PATCH] fix Modul... |
307 |
} |
02a3e59a0 Fix minor typoes ... |
308 309 310 |
/* * 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 |
311 |
*/ |
bf262dcec module: fix noret... |
312 |
void __noreturn __module_put_and_exit(struct module *mod, long code) |
1da177e4c Linux-2.6.12-rc2 |
313 314 315 316 317 |
{ module_put(mod); do_exit(code); } EXPORT_SYMBOL(__module_put_and_exit); |
22a8bdeb5 whitespace fixes:... |
318 |
|
1da177e4c Linux-2.6.12-rc2 |
319 |
/* Find a module section: 0 means not found. */ |
49668688d module: pass load... |
320 |
static unsigned int find_sec(const struct load_info *info, const char *name) |
1da177e4c Linux-2.6.12-rc2 |
321 322 |
{ unsigned int i; |
49668688d module: pass load... |
323 324 |
for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; |
1da177e4c Linux-2.6.12-rc2 |
325 |
/* Alloc bit cleared means "ignore it." */ |
49668688d module: pass load... |
326 327 |
if ((shdr->sh_flags & SHF_ALLOC) && strcmp(info->secstrings + shdr->sh_name, name) == 0) |
1da177e4c Linux-2.6.12-rc2 |
328 |
return i; |
49668688d module: pass load... |
329 |
} |
1da177e4c Linux-2.6.12-rc2 |
330 331 |
return 0; } |
5e458cc0f module: simplify ... |
332 |
/* Find a module section, or NULL. */ |
49668688d module: pass load... |
333 |
static void *section_addr(const struct load_info *info, const char *name) |
5e458cc0f module: simplify ... |
334 335 |
{ /* Section 0 has sh_addr 0. */ |
49668688d module: pass load... |
336 |
return (void *)info->sechdrs[find_sec(info, name)].sh_addr; |
5e458cc0f module: simplify ... |
337 338 339 |
} /* Find a module section, or NULL. Fill in number of "objects" in section. */ |
49668688d module: pass load... |
340 |
static void *section_objs(const struct load_info *info, |
5e458cc0f module: simplify ... |
341 342 343 344 |
const char *name, size_t object_size, unsigned int *num) { |
49668688d module: pass load... |
345 |
unsigned int sec = find_sec(info, name); |
5e458cc0f module: simplify ... |
346 347 |
/* Section 0 has sh_addr 0 and sh_size 0. */ |
49668688d module: pass load... |
348 349 |
*num = info->sechdrs[sec].sh_size / object_size; return (void *)info->sechdrs[sec].sh_addr; |
5e458cc0f module: simplify ... |
350 |
} |
1da177e4c Linux-2.6.12-rc2 |
351 352 353 354 355 |
/* 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... |
356 357 |
extern const struct kernel_symbol __start___ksymtab_gpl_future[]; extern const struct kernel_symbol __stop___ksymtab_gpl_future[]; |
71810db27 modversions: trea... |
358 359 360 |
extern const s32 __start___kcrctab[]; extern const s32 __start___kcrctab_gpl[]; extern const s32 __start___kcrctab_gpl_future[]; |
f7f5b6755 Shrink struct mod... |
361 362 363 364 365 |
#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[]; |
71810db27 modversions: trea... |
366 367 |
extern const s32 __start___kcrctab_unused[]; extern const s32 __start___kcrctab_unused_gpl[]; |
f7f5b6755 Shrink struct mod... |
368 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
369 370 371 372 |
#ifndef CONFIG_MODVERSIONS #define symversion(base, idx) NULL #else |
f83ca9fe3 [PATCH] symversio... |
373 |
#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL) |
1da177e4c Linux-2.6.12-rc2 |
374 |
#endif |
dafd0940c module: generic e... |
375 376 377 378 379 |
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... |
380 |
void *data), |
dafd0940c module: generic e... |
381 |
void *data) |
ad9546c99 module: neaten __... |
382 |
{ |
de4d8d534 module: each_symb... |
383 |
unsigned int j; |
ad9546c99 module: neaten __... |
384 |
|
dafd0940c module: generic e... |
385 |
for (j = 0; j < arrsize; j++) { |
de4d8d534 module: each_symb... |
386 387 |
if (fn(&arr[j], owner, data)) return true; |
f71d20e96 [PATCH] Add EXPOR... |
388 |
} |
dafd0940c module: generic e... |
389 390 |
return false; |
ad9546c99 module: neaten __... |
391 |
} |
dafd0940c module: generic e... |
392 |
/* Returns true as soon as fn returns true, otherwise false. */ |
de4d8d534 module: each_symb... |
393 394 395 396 |
bool each_symbol_section(bool (*fn)(const struct symsearch *arr, struct module *owner, void *data), void *data) |
ad9546c99 module: neaten __... |
397 398 |
{ struct module *mod; |
44032e631 module: reduce st... |
399 |
static const struct symsearch arr[] = { |
ad9546c99 module: neaten __... |
400 |
{ __start___ksymtab, __stop___ksymtab, __start___kcrctab, |
dafd0940c module: generic e... |
401 |
NOT_GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
402 |
{ __start___ksymtab_gpl, __stop___ksymtab_gpl, |
dafd0940c module: generic e... |
403 404 |
__start___kcrctab_gpl, GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
405 |
{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future, |
dafd0940c module: generic e... |
406 407 |
__start___kcrctab_gpl_future, WILL_BE_GPL_ONLY, false }, |
f7f5b6755 Shrink struct mod... |
408 |
#ifdef CONFIG_UNUSED_SYMBOLS |
ad9546c99 module: neaten __... |
409 |
{ __start___ksymtab_unused, __stop___ksymtab_unused, |
dafd0940c module: generic e... |
410 411 |
__start___kcrctab_unused, NOT_GPL_ONLY, true }, |
ad9546c99 module: neaten __... |
412 |
{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl, |
dafd0940c module: generic e... |
413 414 |
__start___kcrctab_unused_gpl, GPL_ONLY, true }, |
f7f5b6755 Shrink struct mod... |
415 |
#endif |
ad9546c99 module: neaten __... |
416 |
}; |
f71d20e96 [PATCH] Add EXPOR... |
417 |
|
0be964be0 module: Sanitize ... |
418 |
module_assert_mutex_or_preempt(); |
dafd0940c module: generic e... |
419 420 |
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data)) return true; |
f71d20e96 [PATCH] Add EXPOR... |
421 |
|
4c50665fc modules: lockdep:... |
422 423 |
list_for_each_entry_rcu(mod, &modules, list, lockdep_is_held(&module_mutex)) { |
ad9546c99 module: neaten __... |
424 425 |
struct symsearch arr[] = { { mod->syms, mod->syms + mod->num_syms, mod->crcs, |
dafd0940c module: generic e... |
426 |
NOT_GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
427 |
{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms, |
dafd0940c module: generic e... |
428 429 |
mod->gpl_crcs, GPL_ONLY, false }, |
ad9546c99 module: neaten __... |
430 431 |
{ mod->gpl_future_syms, mod->gpl_future_syms + mod->num_gpl_future_syms, |
dafd0940c module: generic e... |
432 433 |
mod->gpl_future_crcs, WILL_BE_GPL_ONLY, false }, |
f7f5b6755 Shrink struct mod... |
434 |
#ifdef CONFIG_UNUSED_SYMBOLS |
ad9546c99 module: neaten __... |
435 436 |
{ mod->unused_syms, mod->unused_syms + mod->num_unused_syms, |
dafd0940c module: generic e... |
437 438 |
mod->unused_crcs, NOT_GPL_ONLY, true }, |
ad9546c99 module: neaten __... |
439 440 |
{ mod->unused_gpl_syms, mod->unused_gpl_syms + mod->num_unused_gpl_syms, |
dafd0940c module: generic e... |
441 442 |
mod->unused_gpl_crcs, GPL_ONLY, true }, |
f7f5b6755 Shrink struct mod... |
443 |
#endif |
ad9546c99 module: neaten __... |
444 |
}; |
0d21b0e34 module: add new s... |
445 446 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
dafd0940c module: generic e... |
447 448 449 450 451 |
if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data)) return true; } return false; } |
de4d8d534 module: each_symb... |
452 |
EXPORT_SYMBOL_GPL(each_symbol_section); |
dafd0940c module: generic e... |
453 454 455 456 457 458 459 460 461 |
struct find_symbol_arg { /* Input */ const char *name; bool gplok; bool warn; /* Output */ struct module *owner; |
71810db27 modversions: trea... |
462 |
const s32 *crc; |
414fd31b2 module: Make find... |
463 |
const struct kernel_symbol *sym; |
dafd0940c module: generic e... |
464 |
}; |
2d25bc552 module: make it c... |
465 466 467 |
static bool check_exported_symbol(const struct symsearch *syms, struct module *owner, unsigned int symnum, void *data) |
dafd0940c module: generic e... |
468 469 |
{ struct find_symbol_arg *fsa = data; |
dafd0940c module: generic e... |
470 471 472 473 |
if (!fsa->gplok) { if (syms->licence == GPL_ONLY) return false; if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) { |
bddb12b32 kernel/module.c: ... |
474 475 476 477 |
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... |
478 |
} |
1da177e4c Linux-2.6.12-rc2 |
479 |
} |
ad9546c99 module: neaten __... |
480 |
|
f7f5b6755 Shrink struct mod... |
481 |
#ifdef CONFIG_UNUSED_SYMBOLS |
dafd0940c module: generic e... |
482 |
if (syms->unused && fsa->warn) { |
bddb12b32 kernel/module.c: ... |
483 484 485 486 487 |
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. "); |
7b63c3ab9 kernel/module.c: ... |
488 489 490 |
pr_warn("Please evaluate if this is the right api to use and " "if it really is, submit a report to the linux kernel " "mailing list together with submitting your code for " |
bddb12b32 kernel/module.c: ... |
491 492 |
"inclusion. "); |
dafd0940c module: generic e... |
493 |
} |
f7f5b6755 Shrink struct mod... |
494 |
#endif |
dafd0940c module: generic e... |
495 496 497 |
fsa->owner = owner; fsa->crc = symversion(syms->crcs, symnum); |
414fd31b2 module: Make find... |
498 |
fsa->sym = &syms->start[symnum]; |
dafd0940c module: generic e... |
499 500 |
return true; } |
7290d5809 module: use relat... |
501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 |
static unsigned long kernel_symbol_value(const struct kernel_symbol *sym) { #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS return (unsigned long)offset_to_ptr(&sym->value_offset); #else return sym->value; #endif } static const char *kernel_symbol_name(const struct kernel_symbol *sym) { #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS return offset_to_ptr(&sym->name_offset); #else return sym->name; #endif } |
8651ec01d module: add suppo... |
518 519 520 |
static const char *kernel_symbol_namespace(const struct kernel_symbol *sym) { #ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS |
069e1c07c module: Fix link ... |
521 522 |
if (!sym->namespace_offset) return NULL; |
8651ec01d module: add suppo... |
523 524 525 526 527 |
return offset_to_ptr(&sym->namespace_offset); #else return sym->namespace; #endif } |
b605be658 module: remove un... |
528 |
static int cmp_name(const void *name, const void *sym) |
403ed2784 module: Use the b... |
529 |
{ |
b605be658 module: remove un... |
530 |
return strcmp(name, kernel_symbol_name(sym)); |
403ed2784 module: Use the b... |
531 |
} |
2d25bc552 module: make it c... |
532 533 534 |
static bool find_exported_symbol_in_section(const struct symsearch *syms, struct module *owner, void *data) |
de4d8d534 module: each_symb... |
535 536 |
{ struct find_symbol_arg *fsa = data; |
403ed2784 module: Use the b... |
537 538 539 540 |
struct kernel_symbol *sym; sym = bsearch(fsa->name, syms->start, syms->stop - syms->start, sizeof(struct kernel_symbol), cmp_name); |
2d25bc552 module: make it c... |
541 542 |
if (sym != NULL && check_exported_symbol(syms, owner, sym - syms->start, data)) |
403ed2784 module: Use the b... |
543 |
return true; |
de4d8d534 module: each_symb... |
544 |
|
de4d8d534 module: each_symb... |
545 546 |
return false; } |
2d25bc552 module: make it c... |
547 |
/* Find an exported symbol and return it, along with, (optional) crc and |
75676500f module: make lock... |
548 |
* (optional) module which owns it. Needs preempt disabled or module_mutex. */ |
c6b378019 module: Export sy... |
549 550 |
const struct kernel_symbol *find_symbol(const char *name, struct module **owner, |
71810db27 modversions: trea... |
551 |
const s32 **crc, |
c6b378019 module: Export sy... |
552 553 |
bool gplok, bool warn) |
dafd0940c module: generic e... |
554 555 556 557 558 559 |
{ struct find_symbol_arg fsa; fsa.name = name; fsa.gplok = gplok; fsa.warn = warn; |
2d25bc552 module: make it c... |
560 |
if (each_symbol_section(find_exported_symbol_in_section, &fsa)) { |
dafd0940c module: generic e... |
561 562 563 564 |
if (owner) *owner = fsa.owner; if (crc) *crc = fsa.crc; |
414fd31b2 module: Make find... |
565 |
return fsa.sym; |
dafd0940c module: generic e... |
566 |
} |
5e1241692 module: replace D... |
567 568 |
pr_debug("Failed to find symbol %s ", name); |
414fd31b2 module: Make find... |
569 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
570 |
} |
c6b378019 module: Export sy... |
571 |
EXPORT_SYMBOL_GPL(find_symbol); |
1da177e4c Linux-2.6.12-rc2 |
572 |
|
fe0d34d24 module: weaken lo... |
573 574 575 576 |
/* * Search for module by name: must hold module_mutex (or preempt disabled * for read-only access). */ |
4f6de4d51 module: don't mod... |
577 |
static struct module *find_module_all(const char *name, size_t len, |
0d21b0e34 module: add new s... |
578 |
bool even_unformed) |
1da177e4c Linux-2.6.12-rc2 |
579 580 |
{ struct module *mod; |
fe0d34d24 module: weaken lo... |
581 |
module_assert_mutex_or_preempt(); |
0be964be0 module: Sanitize ... |
582 |
|
4c50665fc modules: lockdep:... |
583 584 |
list_for_each_entry_rcu(mod, &modules, list, lockdep_is_held(&module_mutex)) { |
0d21b0e34 module: add new s... |
585 586 |
if (!even_unformed && mod->state == MODULE_STATE_UNFORMED) continue; |
4f6de4d51 module: don't mod... |
587 |
if (strlen(mod->name) == len && !memcmp(mod->name, name, len)) |
1da177e4c Linux-2.6.12-rc2 |
588 589 590 591 |
return mod; } return NULL; } |
0d21b0e34 module: add new s... |
592 593 594 |
struct module *find_module(const char *name) { |
fe0d34d24 module: weaken lo... |
595 |
module_assert_mutex(); |
4f6de4d51 module: don't mod... |
596 |
return find_module_all(name, strlen(name), false); |
0d21b0e34 module: add new s... |
597 |
} |
c6b378019 module: Export sy... |
598 |
EXPORT_SYMBOL_GPL(find_module); |
1da177e4c Linux-2.6.12-rc2 |
599 600 |
#ifdef CONFIG_SMP |
fbf59bc9d percpu: implement... |
601 |
|
259354dea module: encapsula... |
602 |
static inline void __percpu *mod_percpu(struct module *mod) |
fbf59bc9d percpu: implement... |
603 |
{ |
259354dea module: encapsula... |
604 605 |
return mod->percpu; } |
fbf59bc9d percpu: implement... |
606 |
|
9eb76d779 module: cleanup c... |
607 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
608 |
{ |
9eb76d779 module: cleanup c... |
609 610 611 612 613 |
Elf_Shdr *pcpusec = &info->sechdrs[info->index.pcpu]; unsigned long align = pcpusec->sh_addralign; if (!pcpusec->sh_size) return 0; |
fbf59bc9d percpu: implement... |
614 |
if (align > PAGE_SIZE) { |
bddb12b32 kernel/module.c: ... |
615 616 617 |
pr_warn("%s: per-cpu alignment %li > %li ", mod->name, align, PAGE_SIZE); |
fbf59bc9d percpu: implement... |
618 619 |
align = PAGE_SIZE; } |
9eb76d779 module: cleanup c... |
620 |
mod->percpu = __alloc_reserved_percpu(pcpusec->sh_size, align); |
259354dea module: encapsula... |
621 |
if (!mod->percpu) { |
bddb12b32 kernel/module.c: ... |
622 623 624 |
pr_warn("%s: Could not allocate %lu bytes percpu data ", mod->name, (unsigned long)pcpusec->sh_size); |
259354dea module: encapsula... |
625 626 |
return -ENOMEM; } |
9eb76d779 module: cleanup c... |
627 |
mod->percpu_size = pcpusec->sh_size; |
259354dea module: encapsula... |
628 |
return 0; |
fbf59bc9d percpu: implement... |
629 |
} |
259354dea module: encapsula... |
630 |
static void percpu_modfree(struct module *mod) |
fbf59bc9d percpu: implement... |
631 |
{ |
259354dea module: encapsula... |
632 |
free_percpu(mod->percpu); |
fbf59bc9d percpu: implement... |
633 |
} |
49668688d module: pass load... |
634 |
static unsigned int find_pcpusec(struct load_info *info) |
6b588c18f module: reorder m... |
635 |
{ |
49668688d module: pass load... |
636 |
return find_sec(info, ".data..percpu"); |
6b588c18f module: reorder m... |
637 |
} |
259354dea module: encapsula... |
638 639 |
static void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
6b588c18f module: reorder m... |
640 641 642 643 |
{ int cpu; for_each_possible_cpu(cpu) |
259354dea module: encapsula... |
644 |
memcpy(per_cpu_ptr(mod->percpu, cpu), from, size); |
6b588c18f module: reorder m... |
645 |
} |
383776fa7 locking/lockdep: ... |
646 |
bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) |
10fad5e46 percpu, module: i... |
647 648 649 650 651 652 653 |
{ struct module *mod; unsigned int cpu; preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
654 655 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
10fad5e46 percpu, module: i... |
656 657 658 659 |
if (!mod->percpu_size) continue; for_each_possible_cpu(cpu) { void *start = per_cpu_ptr(mod->percpu, cpu); |
383776fa7 locking/lockdep: ... |
660 |
void *va = (void *)addr; |
10fad5e46 percpu, module: i... |
661 |
|
383776fa7 locking/lockdep: ... |
662 |
if (va >= start && va < start + mod->percpu_size) { |
8ce371f98 lockdep: Fix per-... |
663 |
if (can_addr) { |
383776fa7 locking/lockdep: ... |
664 |
*can_addr = (unsigned long) (va - start); |
8ce371f98 lockdep: Fix per-... |
665 666 667 668 |
*can_addr += (unsigned long) per_cpu_ptr(mod->percpu, get_boot_cpu_id()); } |
10fad5e46 percpu, module: i... |
669 670 671 672 673 674 675 676 |
preempt_enable(); return true; } } } preempt_enable(); return false; |
6b588c18f module: reorder m... |
677 |
} |
383776fa7 locking/lockdep: ... |
678 679 680 681 682 683 684 685 686 687 688 689 690 |
/** * 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) { return __is_module_percpu_address(addr, NULL); } |
1da177e4c Linux-2.6.12-rc2 |
691 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
692 |
|
259354dea module: encapsula... |
693 |
static inline void __percpu *mod_percpu(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
694 695 696 |
{ return NULL; } |
9eb76d779 module: cleanup c... |
697 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
698 |
{ |
9eb76d779 module: cleanup c... |
699 700 701 702 |
/* 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... |
703 704 |
} static inline void percpu_modfree(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
705 |
{ |
1da177e4c Linux-2.6.12-rc2 |
706 |
} |
49668688d module: pass load... |
707 |
static unsigned int find_pcpusec(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
708 709 710 |
{ return 0; } |
259354dea module: encapsula... |
711 712 |
static inline void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
713 714 715 716 |
{ /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
10fad5e46 percpu, module: i... |
717 718 719 720 |
bool is_module_percpu_address(unsigned long addr) { return false; } |
6b588c18f module: reorder m... |
721 |
|
383776fa7 locking/lockdep: ... |
722 723 724 725 |
bool __is_module_percpu_address(unsigned long addr, unsigned long *can_addr) { return false; } |
1da177e4c Linux-2.6.12-rc2 |
726 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
727 728 729 730 731 732 |
#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... |
733 |
struct module_kobject *mk, char *buffer) \ |
c988d2b28 [PATCH] modules: ... |
734 |
{ \ |
cc56ded3f kernel/module.c: ... |
735 736 |
return scnprintf(buffer, PAGE_SIZE, "%s ", mk->mod->field); \ |
c988d2b28 [PATCH] modules: ... |
737 738 739 740 741 742 743 |
} \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
22a8bdeb5 whitespace fixes:... |
744 745 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
746 747 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
748 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
749 750 751 752 753 754 755 756 |
.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 ... |
757 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
758 |
#ifdef CONFIG_MODULE_UNLOAD |
eb0c53771 tracing: Fix comp... |
759 760 |
EXPORT_TRACEPOINT_SYMBOL(module_get); |
e513cc1c0 module: Remove st... |
761 762 |
/* MODULE_REF_BASE is the base reference count by kmodule loader. */ #define MODULE_REF_BASE 1 |
1da177e4c Linux-2.6.12-rc2 |
763 |
/* Init the unload section of the module. */ |
9f85a4bbb module: refactor ... |
764 |
static int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
765 |
{ |
e513cc1c0 module: Remove st... |
766 767 768 769 770 |
/* * Initialize reference counter to MODULE_REF_BASE. * refcnt == 0 means module is going. */ atomic_set(&mod->refcnt, MODULE_REF_BASE); |
9f85a4bbb module: refactor ... |
771 |
|
2c02dfe7f module: Make the ... |
772 773 |
INIT_LIST_HEAD(&mod->source_list); INIT_LIST_HEAD(&mod->target_list); |
e1783a240 module: Use this_... |
774 |
|
1da177e4c Linux-2.6.12-rc2 |
775 |
/* Hold reference count during initialization. */ |
e513cc1c0 module: Remove st... |
776 |
atomic_inc(&mod->refcnt); |
9f85a4bbb module: refactor ... |
777 778 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
779 |
} |
1da177e4c Linux-2.6.12-rc2 |
780 781 782 783 |
/* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; |
2c02dfe7f module: Make the ... |
784 785 |
list_for_each_entry(use, &b->source_list, source_list) { if (use->source == a) { |
5e1241692 module: replace D... |
786 787 |
pr_debug("%s uses %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
788 789 790 |
return 1; } } |
5e1241692 module: replace D... |
791 792 |
pr_debug("%s does not use %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
793 794 |
return 0; } |
2c02dfe7f module: Make the ... |
795 796 797 798 799 800 801 802 803 |
/* * 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 ... |
804 |
struct module_use *use; |
5e1241692 module: replace D... |
805 806 |
pr_debug("Allocating new usage for %s. ", a->name); |
2c02dfe7f module: Make the ... |
807 |
use = kmalloc(sizeof(*use), GFP_ATOMIC); |
9ad045742 kernel/module: De... |
808 |
if (!use) |
2c02dfe7f module: Make the ... |
809 |
return -ENOMEM; |
2c02dfe7f module: Make the ... |
810 811 812 813 814 |
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 ... |
815 816 |
return 0; } |
75676500f module: make lock... |
817 |
/* Module a uses b: caller needs module_mutex() */ |
9bea7f239 module: fix bne2 ... |
818 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
819 |
{ |
c8e21ced0 module: fix kdb's... |
820 |
int err; |
270a6c4ca /sys/modules/*/ho... |
821 |
|
9bea7f239 module: fix bne2 ... |
822 |
if (b == NULL || already_uses(a, b)) |
218ce7351 Revert "module: d... |
823 |
return 0; |
218ce7351 Revert "module: d... |
824 |
|
9bea7f239 module: fix bne2 ... |
825 826 |
/* If module isn't available, we fail. */ err = strong_try_module_get(b); |
c9a3ba55b module: wait for ... |
827 |
if (err) |
9bea7f239 module: fix bne2 ... |
828 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
829 |
|
2c02dfe7f module: Make the ... |
830 831 |
err = add_module_usage(a, b); if (err) { |
1da177e4c Linux-2.6.12-rc2 |
832 |
module_put(b); |
9bea7f239 module: fix bne2 ... |
833 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
834 |
} |
9bea7f239 module: fix bne2 ... |
835 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
836 |
} |
9bea7f239 module: fix bne2 ... |
837 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
838 839 840 841 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { |
2c02dfe7f module: Make the ... |
842 |
struct module_use *use, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
843 |
|
75676500f module: make lock... |
844 |
mutex_lock(&module_mutex); |
2c02dfe7f module: Make the ... |
845 846 |
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) { struct module *i = use->target; |
5e1241692 module: replace D... |
847 848 |
pr_debug("%s unusing %s ", mod->name, i->name); |
2c02dfe7f module: Make the ... |
849 850 851 852 |
module_put(i); list_del(&use->source_list); list_del(&use->target_list); kfree(use); |
1da177e4c Linux-2.6.12-rc2 |
853 |
} |
75676500f module: make lock... |
854 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
855 856 857 |
} #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
858 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
859 860 861 |
{ int ret = (flags & O_TRUNC); if (ret) |
373d4d099 taint: add explic... |
862 |
add_taint(TAINT_FORCED_RMMOD, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
863 864 865 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
866 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
867 868 869 870 |
{ return 0; } #endif /* CONFIG_MODULE_FORCE_UNLOAD */ |
e513cc1c0 module: Remove st... |
871 872 |
/* Try to release refcount of module, 0 means success. */ static int try_release_module_ref(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
873 |
{ |
e513cc1c0 module: Remove st... |
874 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
875 |
|
e513cc1c0 module: Remove st... |
876 877 878 879 880 881 |
/* Try to decrement refcnt which we set at loading */ ret = atomic_sub_return(MODULE_REF_BASE, &mod->refcnt); BUG_ON(ret < 0); if (ret) /* Someone can put this right now, recover with checking */ ret = atomic_add_unless(&mod->refcnt, MODULE_REF_BASE, 0); |
1da177e4c Linux-2.6.12-rc2 |
882 |
|
e513cc1c0 module: Remove st... |
883 884 |
return ret; } |
1da177e4c Linux-2.6.12-rc2 |
885 |
|
e513cc1c0 module: Remove st... |
886 887 |
static int try_stop_module(struct module *mod, int flags, int *forced) { |
da39ba5e1 module: don't use... |
888 |
/* If it's not unused, quit unless we're forcing. */ |
e513cc1c0 module: Remove st... |
889 890 891 |
if (try_release_module_ref(mod) != 0) { *forced = try_force_unload(flags); if (!(*forced)) |
1da177e4c Linux-2.6.12-rc2 |
892 893 894 895 |
return -EWOULDBLOCK; } /* Mark it as dying. */ |
e513cc1c0 module: Remove st... |
896 |
mod->state = MODULE_STATE_GOING; |
1da177e4c Linux-2.6.12-rc2 |
897 |
|
e513cc1c0 module: Remove st... |
898 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
899 |
} |
d5db139ab module: make modu... |
900 901 902 903 904 905 906 907 908 909 |
/** * module_refcount - return the refcount or -1 if unloading * * @mod: the module we're checking * * Returns: * -1 if the module is in the process of unloading * otherwise the number of references in the kernel to the module */ int module_refcount(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
910 |
{ |
d5db139ab module: make modu... |
911 |
return atomic_read(&mod->refcnt) - MODULE_REF_BASE; |
1da177e4c Linux-2.6.12-rc2 |
912 913 914 915 916 |
} EXPORT_SYMBOL(module_refcount); /* This exists whether we can unload or not */ static void free_module(struct module *mod); |
17da2bd90 [CVE-2009-0029] S... |
917 918 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
919 920 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
921 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
922 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
923 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
924 925 926 927 928 |
return -EPERM; if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) return -EFAULT; name[MODULE_NAME_LEN-1] = '\0'; |
f6276ac95 audit: log module... |
929 |
audit_log_kern_module(name); |
3fc1f1e27 stop_machine: rei... |
930 931 |
if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; |
1da177e4c Linux-2.6.12-rc2 |
932 933 934 935 936 937 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } |
2c02dfe7f module: Make the ... |
938 |
if (!list_empty(&mod->source_list)) { |
1da177e4c Linux-2.6.12-rc2 |
939 940 941 942 943 944 945 |
/* 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... |
946 |
/* FIXME: if (force), slam module count damn the torpedoes */ |
5e1241692 module: replace D... |
947 948 |
pr_debug("%s already dying ", mod->name); |
1da177e4c Linux-2.6.12-rc2 |
949 950 951 952 953 |
ret = -EBUSY; goto out; } /* If it has an init func, it must have an exit func to unload */ |
af49d9248 Remove "unsafe" f... |
954 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
955 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
956 957 958 959 960 961 |
if (!forced) { /* This module can't be removed */ ret = -EBUSY; goto out; } } |
1da177e4c Linux-2.6.12-rc2 |
962 963 964 965 |
/* 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... |
966 |
mutex_unlock(&module_mutex); |
25985edce Fix common misspe... |
967 |
/* Final destruction now no one is using it. */ |
df4b565e1 module: add MODUL... |
968 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
969 |
mod->exit(); |
df4b565e1 module: add MODUL... |
970 971 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
7e545d6ec livepatch/module:... |
972 |
klp_module_going(mod); |
7dcd182be ftrace/module: re... |
973 |
ftrace_release_mod(mod); |
22a9d6456 async: Asynchrono... |
974 |
async_synchronize_full(); |
75676500f module: make lock... |
975 |
|
e14af7eeb debug: track and ... |
976 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
977 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
1da177e4c Linux-2.6.12-rc2 |
978 |
|
75676500f module: make lock... |
979 |
free_module(mod); |
1e102037f kernel/module.c: ... |
980 981 |
/* someone could wait for the module in add_unformed_module() */ wake_up_all(&module_wq); |
75676500f module: make lock... |
982 983 |
return 0; out: |
6389a3851 [PATCH] kernel/mo... |
984 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
985 986 |
return ret; } |
d1e99d7ae module: fix warni... |
987 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
988 989 990 |
{ struct module_use *use; int printed_something = 0; |
d5db139ab module: make modu... |
991 |
seq_printf(m, " %i ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
992 |
|
6da0b5651 kernel:module Fix... |
993 994 995 996 |
/* * Always include a trailing , so userspace can differentiate * between this and the old multi-field proc format. */ |
2c02dfe7f module: Make the ... |
997 |
list_for_each_entry(use, &mod->source_list, source_list) { |
1da177e4c Linux-2.6.12-rc2 |
998 |
printed_something = 1; |
2c02dfe7f module: Make the ... |
999 |
seq_printf(m, "%s,", use->source->name); |
1da177e4c Linux-2.6.12-rc2 |
1000 |
} |
1da177e4c Linux-2.6.12-rc2 |
1001 1002 |
if (mod->init != NULL && mod->exit == NULL) { printed_something = 1; |
6da0b5651 kernel:module Fix... |
1003 |
seq_puts(m, "[permanent],"); |
1da177e4c Linux-2.6.12-rc2 |
1004 1005 1006 |
} if (!printed_something) |
6da0b5651 kernel:module Fix... |
1007 |
seq_puts(m, "-"); |
1da177e4c Linux-2.6.12-rc2 |
1008 1009 1010 1011 1012 |
} void __symbol_put(const char *symbol) { struct module *owner; |
1da177e4c Linux-2.6.12-rc2 |
1013 |
|
24da1cbff modules: remove m... |
1014 |
preempt_disable(); |
414fd31b2 module: Make find... |
1015 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
1018 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1019 1020 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
1021 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
1022 1023 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
1024 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
1025 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
1026 |
|
7d1d16e41 module: fix BUG_O... |
1027 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
1028 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1029 |
|
275d7d44d module: Fix locki... |
1030 1031 1032 1033 1034 |
/* * Even though we hold a reference on the module; we still need to * disable preemption in order to safely traverse the data structure. */ preempt_disable(); |
7d1d16e41 module: fix BUG_O... |
1035 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
1036 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
1037 |
module_put(modaddr); |
275d7d44d module: Fix locki... |
1038 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1039 1040 1041 1042 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, |
4befb026c module: change at... |
1043 |
struct module_kobject *mk, char *buffer) |
1da177e4c Linux-2.6.12-rc2 |
1044 |
{ |
d5db139ab module: make modu... |
1045 1046 |
return sprintf(buffer, "%i ", module_refcount(mk->mod)); |
1da177e4c Linux-2.6.12-rc2 |
1047 |
} |
cca3e7073 modules: sysfs - ... |
1048 1049 |
static struct module_attribute modinfo_refcnt = __ATTR(refcnt, 0444, show_refcnt, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1050 |
|
d53799be6 module: move __mo... |
1051 1052 1053 1054 |
void __module_get(struct module *module) { if (module) { preempt_disable(); |
2f35c41f5 module: Replace m... |
1055 |
atomic_inc(&module->refcnt); |
d53799be6 module: move __mo... |
1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 |
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(); |
e513cc1c0 module: Remove st... |
1068 1069 1070 |
/* Note: here, we can fail to get a reference */ if (likely(module_is_live(module) && atomic_inc_not_zero(&module->refcnt) != 0)) |
d53799be6 module: move __mo... |
1071 |
trace_module_get(module, _RET_IP_); |
e513cc1c0 module: Remove st... |
1072 |
else |
d53799be6 module: move __mo... |
1073 1074 1075 1076 1077 1078 1079 |
ret = false; preempt_enable(); } return ret; } EXPORT_SYMBOL(try_module_get); |
f6a570333 [PATCH] severing ... |
1080 1081 |
void module_put(struct module *module) { |
e513cc1c0 module: Remove st... |
1082 |
int ret; |
f6a570333 [PATCH] severing ... |
1083 |
if (module) { |
e1783a240 module: Use this_... |
1084 |
preempt_disable(); |
e513cc1c0 module: Remove st... |
1085 1086 |
ret = atomic_dec_if_positive(&module->refcnt); WARN_ON(ret < 0); /* Failed to put refcount */ |
ae832d1e0 tracing: Remove s... |
1087 |
trace_module_put(module, _RET_IP_); |
e1783a240 module: Use this_... |
1088 |
preempt_enable(); |
f6a570333 [PATCH] severing ... |
1089 1090 1091 |
} } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
1092 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
1093 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1094 1095 |
{ /* We don't know the usage count, or what modules are using. */ |
6da0b5651 kernel:module Fix... |
1096 |
seq_puts(m, " - -"); |
1da177e4c Linux-2.6.12-rc2 |
1097 1098 1099 1100 1101 |
} static inline void module_unload_free(struct module *mod) { } |
9bea7f239 module: fix bne2 ... |
1102 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
1103 |
{ |
9bea7f239 module: fix bne2 ... |
1104 |
return strong_try_module_get(b); |
1da177e4c Linux-2.6.12-rc2 |
1105 |
} |
9bea7f239 module: fix bne2 ... |
1106 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
1107 |
|
9f85a4bbb module: refactor ... |
1108 |
static inline int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1109 |
{ |
9f85a4bbb module: refactor ... |
1110 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
1111 1112 |
} #endif /* CONFIG_MODULE_UNLOAD */ |
53999bf34 error: implicit d... |
1113 1114 1115 |
static size_t module_flags_taint(struct module *mod, char *buf) { size_t l = 0; |
7fd8329ba taint/module: Cle... |
1116 1117 1118 1119 |
int i; for (i = 0; i < TAINT_FLAGS_COUNT; i++) { if (taint_flags[i].module && test_bit(i, &mod->taints)) |
5eb7c0d04 taint/module: Fix... |
1120 |
buf[l++] = taint_flags[i].c_true; |
7fd8329ba taint/module: Cle... |
1121 |
} |
53999bf34 error: implicit d... |
1122 |
|
53999bf34 error: implicit d... |
1123 1124 |
return l; } |
1f71740ab Driver core: show... |
1125 |
static ssize_t show_initstate(struct module_attribute *mattr, |
4befb026c module: change at... |
1126 |
struct module_kobject *mk, char *buffer) |
1f71740ab Driver core: show... |
1127 1128 |
{ const char *state = "unknown"; |
4befb026c module: change at... |
1129 |
switch (mk->mod->state) { |
1f71740ab Driver core: show... |
1130 1131 1132 1133 1134 1135 1136 1137 1138 |
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... |
1139 1140 |
default: BUG(); |
1f71740ab Driver core: show... |
1141 1142 1143 1144 |
} return sprintf(buffer, "%s ", state); } |
cca3e7073 modules: sysfs - ... |
1145 1146 |
static struct module_attribute modinfo_initstate = __ATTR(initstate, 0444, show_initstate, NULL); |
1f71740ab Driver core: show... |
1147 |
|
88bfa3247 module: add /sys/... |
1148 1149 1150 1151 |
static ssize_t store_uevent(struct module_attribute *mattr, struct module_kobject *mk, const char *buffer, size_t count) { |
df44b4796 kobject: return e... |
1152 1153 1154 1155 |
int rc; rc = kobject_synth_uevent(&mk->kobj, buffer, count); return rc ? rc : count; |
88bfa3247 module: add /sys/... |
1156 |
} |
cca3e7073 modules: sysfs - ... |
1157 1158 1159 1160 1161 1162 |
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) { |
7523e4dc5 module: use a str... |
1163 1164 |
return sprintf(buffer, "%u ", mk->mod->core_layout.size); |
cca3e7073 modules: sysfs - ... |
1165 1166 1167 1168 1169 1170 1171 1172 |
} 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) { |
7523e4dc5 module: use a str... |
1173 1174 |
return sprintf(buffer, "%u ", mk->mod->init_layout.size); |
cca3e7073 modules: sysfs - ... |
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 |
} 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/... |
1193 |
|
03e88ae1b [PATCH] fix modul... |
1194 |
static struct module_attribute *modinfo_attrs[] = { |
cca3e7073 modules: sysfs - ... |
1195 |
&module_uevent, |
03e88ae1b [PATCH] fix modul... |
1196 1197 |
&modinfo_version, &modinfo_srcversion, |
cca3e7073 modules: sysfs - ... |
1198 1199 1200 1201 |
&modinfo_initstate, &modinfo_coresize, &modinfo_initsize, &modinfo_taint, |
03e88ae1b [PATCH] fix modul... |
1202 |
#ifdef CONFIG_MODULE_UNLOAD |
cca3e7073 modules: sysfs - ... |
1203 |
&modinfo_refcnt, |
03e88ae1b [PATCH] fix modul... |
1204 1205 1206 |
#endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
1207 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
1208 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
1209 1210 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
1211 |
if (!test_taint(TAINT_FORCED_MODULE)) |
bddb12b32 kernel/module.c: ... |
1212 1213 |
pr_warn("%s: %s: kernel tainted. ", mod->name, reason); |
373d4d099 taint: add explic... |
1214 |
add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE); |
826e4506a Make forced modul... |
1215 1216 1217 1218 1219 |
return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
1220 |
#ifdef CONFIG_MODVERSIONS |
71810db27 modversions: trea... |
1221 1222 |
static u32 resolve_rel_crc(const s32 *crc) |
d4703aefd module: handle pp... |
1223 |
{ |
71810db27 modversions: trea... |
1224 |
return *(u32 *)((void *)crc + *crc); |
d4703aefd module: handle pp... |
1225 |
} |
490194269 module: Pass stru... |
1226 |
static int check_version(const struct load_info *info, |
1da177e4c Linux-2.6.12-rc2 |
1227 |
const char *symname, |
6da0b5651 kernel:module Fix... |
1228 |
struct module *mod, |
71810db27 modversions: trea... |
1229 |
const s32 *crc) |
1da177e4c Linux-2.6.12-rc2 |
1230 |
{ |
490194269 module: Pass stru... |
1231 1232 |
Elf_Shdr *sechdrs = info->sechdrs; unsigned int versindex = info->index.vers; |
1da177e4c Linux-2.6.12-rc2 |
1233 1234 1235 1236 1237 1238 |
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... |
1239 1240 1241 |
/* 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 |
1242 1243 1244 1245 1246 |
versions = (void *) sechdrs[versindex].sh_addr; num_versions = sechdrs[versindex].sh_size / sizeof(struct modversion_info); for (i = 0; i < num_versions; i++) { |
71810db27 modversions: trea... |
1247 |
u32 crcval; |
1da177e4c Linux-2.6.12-rc2 |
1248 1249 |
if (strcmp(versions[i].name, symname) != 0) continue; |
71810db27 modversions: trea... |
1250 1251 1252 1253 1254 |
if (IS_ENABLED(CONFIG_MODULE_REL_CRCS)) crcval = resolve_rel_crc(crc); else crcval = *crc; if (versions[i].crc == crcval) |
1da177e4c Linux-2.6.12-rc2 |
1255 |
return 1; |
71810db27 modversions: trea... |
1256 1257 1258 |
pr_debug("Found checksum %X vs module %lX ", crcval, versions[i].crc); |
826e4506a Make forced modul... |
1259 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1260 |
} |
826e4506a Make forced modul... |
1261 |
|
faaae2a58 Re-enable CONFIG_... |
1262 |
/* Broken toolchain. Warn once, then let it go.. */ |
3e2e857f9 module: Add modul... |
1263 1264 |
pr_warn_once("%s: no symbol version for %s ", info->name, symname); |
faaae2a58 Re-enable CONFIG_... |
1265 |
return 1; |
826e4506a Make forced modul... |
1266 1267 |
bad_version: |
6da0b5651 kernel:module Fix... |
1268 1269 |
pr_warn("%s: disagrees about version of symbol %s ", |
3e2e857f9 module: Add modul... |
1270 |
info->name, symname); |
826e4506a Make forced modul... |
1271 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
1272 |
} |
490194269 module: Pass stru... |
1273 |
static inline int check_modstruct_version(const struct load_info *info, |
1da177e4c Linux-2.6.12-rc2 |
1274 1275 |
struct module *mod) { |
71810db27 modversions: trea... |
1276 |
const s32 *crc; |
1da177e4c Linux-2.6.12-rc2 |
1277 |
|
926a59b1d module: Annotate ... |
1278 1279 1280 1281 1282 |
/* * Since this should be found in kernel (which can't be removed), no * locking is necessary -- use preempt_disable() to placate lockdep. */ preempt_disable(); |
996302c5e module: replace V... |
1283 |
if (!find_symbol("module_layout", NULL, &crc, true, false)) { |
926a59b1d module: Annotate ... |
1284 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1285 |
BUG(); |
926a59b1d module: Annotate ... |
1286 1287 |
} preempt_enable(); |
996302c5e module: replace V... |
1288 |
return check_version(info, "module_layout", mod, crc); |
1da177e4c Linux-2.6.12-rc2 |
1289 |
} |
91e37a793 module: don't ign... |
1290 1291 1292 |
/* 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 |
1293 |
{ |
91e37a793 module: don't ign... |
1294 1295 1296 1297 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1298 1299 1300 |
return strcmp(amagic, bmagic) == 0; } #else |
490194269 module: Pass stru... |
1301 |
static inline int check_version(const struct load_info *info, |
1da177e4c Linux-2.6.12-rc2 |
1302 |
const char *symname, |
6da0b5651 kernel:module Fix... |
1303 |
struct module *mod, |
71810db27 modversions: trea... |
1304 |
const s32 *crc) |
1da177e4c Linux-2.6.12-rc2 |
1305 1306 1307 |
{ return 1; } |
490194269 module: Pass stru... |
1308 |
static inline int check_modstruct_version(const struct load_info *info, |
1da177e4c Linux-2.6.12-rc2 |
1309 1310 1311 1312 |
struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1313 1314 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1315 1316 1317 1318 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ |
8651ec01d module: add suppo... |
1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 |
static char *get_modinfo(const struct load_info *info, const char *tag); static char *get_next_modinfo(const struct load_info *info, const char *tag, char *prev); static int verify_namespace_is_imported(const struct load_info *info, const struct kernel_symbol *sym, struct module *mod) { const char *namespace; char *imported_namespace; namespace = kernel_symbol_namespace(sym); if (namespace) { imported_namespace = get_modinfo(info, "import_ns"); while (imported_namespace) { if (strcmp(namespace, imported_namespace) == 0) return 0; imported_namespace = get_next_modinfo( info, "import_ns", imported_namespace); } |
3d52ec5e5 module: add confi... |
1339 1340 1341 1342 1343 1344 1345 1346 1347 |
#ifdef CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS pr_warn( #else pr_err( #endif "%s: module uses symbol (%s) from namespace %s, but does not import it. ", mod->name, kernel_symbol_name(sym), namespace); #ifndef CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS |
8651ec01d module: add suppo... |
1348 |
return -EINVAL; |
3d52ec5e5 module: add confi... |
1349 |
#endif |
8651ec01d module: add suppo... |
1350 1351 1352 |
} return 0; } |
75676500f module: make lock... |
1353 |
/* Resolve a symbol for this module. I.e. if we find one, record usage. */ |
49668688d module: pass load... |
1354 1355 |
static const struct kernel_symbol *resolve_symbol(struct module *mod, const struct load_info *info, |
414fd31b2 module: Make find... |
1356 |
const char *name, |
9bea7f239 module: fix bne2 ... |
1357 |
char ownername[]) |
1da177e4c Linux-2.6.12-rc2 |
1358 1359 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1360 |
const struct kernel_symbol *sym; |
71810db27 modversions: trea... |
1361 |
const s32 *crc; |
9bea7f239 module: fix bne2 ... |
1362 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
1363 |
|
d64810f56 module: Annotate ... |
1364 1365 1366 1367 1368 1369 |
/* * The module_mutex should not be a heavily contended lock; * if we get the occasional sleep here, we'll go an extra iteration * in the wait_event_interruptible(), which is harmless. */ sched_annotate_sleep(); |
75676500f module: make lock... |
1370 |
mutex_lock(&module_mutex); |
414fd31b2 module: Make find... |
1371 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1372 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
9bea7f239 module: fix bne2 ... |
1373 1374 |
if (!sym) goto unlock; |
490194269 module: Pass stru... |
1375 |
if (!check_version(info, name, mod, crc)) { |
9bea7f239 module: fix bne2 ... |
1376 1377 |
sym = ERR_PTR(-EINVAL); goto getname; |
1da177e4c Linux-2.6.12-rc2 |
1378 |
} |
9bea7f239 module: fix bne2 ... |
1379 |
|
8651ec01d module: add suppo... |
1380 1381 1382 1383 1384 |
err = verify_namespace_is_imported(info, sym, mod); if (err) { sym = ERR_PTR(err); goto getname; } |
9bea7f239 module: fix bne2 ... |
1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 |
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... |
1395 |
mutex_unlock(&module_mutex); |
218ce7351 Revert "module: d... |
1396 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1397 |
} |
49668688d module: pass load... |
1398 1399 1400 1401 |
static const struct kernel_symbol * resolve_symbol_wait(struct module *mod, const struct load_info *info, const char *name) |
9bea7f239 module: fix bne2 ... |
1402 1403 |
{ const struct kernel_symbol *ksym; |
49668688d module: pass load... |
1404 |
char owner[MODULE_NAME_LEN]; |
9bea7f239 module: fix bne2 ... |
1405 1406 |
if (wait_event_interruptible_timeout(module_wq, |
49668688d module: pass load... |
1407 1408 |
!IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, |
9bea7f239 module: fix bne2 ... |
1409 |
30 * HZ) <= 0) { |
bddb12b32 kernel/module.c: ... |
1410 1411 1412 |
pr_warn("%s: gave up waiting for init of module %s. ", mod->name, owner); |
9bea7f239 module: fix bne2 ... |
1413 1414 1415 |
} return ksym; } |
1da177e4c Linux-2.6.12-rc2 |
1416 1417 1418 1419 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
8f6d03781 module: sysfs cle... |
1420 |
#ifdef CONFIG_SYSFS |
10b465aaf modules: Skip emp... |
1421 |
|
8f6d03781 module: sysfs cle... |
1422 |
#ifdef CONFIG_KALLSYMS |
10b465aaf modules: Skip emp... |
1423 1424 1425 1426 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
6da0b5651 kernel:module Fix... |
1427 |
struct module_sect_attr { |
a58730c42 module: make modu... |
1428 1429 1430 1431 |
struct module_attribute mattr; char *name; unsigned long address; }; |
6da0b5651 kernel:module Fix... |
1432 |
struct module_sect_attrs { |
a58730c42 module: make modu... |
1433 1434 1435 1436 |
struct attribute_group grp; unsigned int nsections; struct module_sect_attr attrs[0]; }; |
1da177e4c Linux-2.6.12-rc2 |
1437 |
static ssize_t module_sect_show(struct module_attribute *mattr, |
4befb026c module: change at... |
1438 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1439 1440 1441 |
{ struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); |
be71eda53 module: Fix displ... |
1442 1443 1444 |
return sprintf(buf, "0x%px ", kptr_restrict < 2 ? (void *)sattr->address : NULL); |
1da177e4c Linux-2.6.12-rc2 |
1445 |
} |
04b1db9fd [PATCH] /sys/modu... |
1446 1447 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1448 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1449 1450 1451 1452 1453 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
8f6d03781 module: sysfs cle... |
1454 |
static void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1455 1456 1457 1458 1459 |
{ unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1460 |
|
1da177e4c Linux-2.6.12-rc2 |
1461 |
/* Count loaded sections and allocate structures */ |
8f6d03781 module: sysfs cle... |
1462 1463 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1464 |
nloaded++; |
8d1b73dd2 kernel: module: U... |
1465 |
size[0] = ALIGN(struct_size(sect_attrs, attrs, nloaded), |
1da177e4c Linux-2.6.12-rc2 |
1466 1467 |
sizeof(sect_attrs->grp.attrs[0])); size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]); |
04b1db9fd [PATCH] /sys/modu... |
1468 1469 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1470 1471 1472 1473 1474 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1475 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1476 1477 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; |
8f6d03781 module: sysfs cle... |
1478 1479 1480 |
for (i = 0; i < info->hdr->e_shnum; i++) { Elf_Shdr *sec = &info->sechdrs[i]; if (sect_empty(sec)) |
35dead423 modules: don't ex... |
1481 |
continue; |
8f6d03781 module: sysfs cle... |
1482 1483 |
sattr->address = sec->sh_addr; sattr->name = kstrdup(info->secstrings + sec->sh_name, |
04b1db9fd [PATCH] /sys/modu... |
1484 1485 1486 1487 |
GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
361795b1e sysfs: Use sysfs_... |
1488 |
sysfs_attr_init(&sattr->mattr.attr); |
1da177e4c Linux-2.6.12-rc2 |
1489 1490 1491 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
277642dcc modules: make sys... |
1492 |
sattr->mattr.attr.mode = S_IRUSR; |
1da177e4c Linux-2.6.12-rc2 |
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 |
*(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... |
1503 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1504 1505 1506 1507 1508 1509 1510 1511 1512 |
} 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... |
1513 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1514 1515 1516 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1517 1518 1519 1520 1521 1522 1523 1524 1525 |
/* * /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... |
1526 |
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, |
6d7601338 Add /sys/module/n... |
1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 |
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... |
1544 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1545 1546 1547 |
} kfree(notes_attrs); } |
8f6d03781 module: sysfs cle... |
1548 |
static void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1549 1550 1551 1552 |
{ unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1553 1554 1555 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1556 1557 |
/* Count notes sections and allocate structures. */ notes = 0; |
8f6d03781 module: sysfs cle... |
1558 1559 1560 |
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... |
1561 1562 1563 1564 |
++notes; if (notes == 0) return; |
acafe7e30 treewide: Use str... |
1565 |
notes_attrs = kzalloc(struct_size(notes_attrs, attrs, notes), |
6d7601338 Add /sys/module/n... |
1566 1567 1568 1569 1570 1571 |
GFP_KERNEL); if (notes_attrs == NULL) return; notes_attrs->notes = notes; nattr = ¬es_attrs->attrs[0]; |
8f6d03781 module: sysfs cle... |
1572 1573 |
for (loaded = i = 0; i < info->hdr->e_shnum; ++i) { if (sect_empty(&info->sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1574 |
continue; |
8f6d03781 module: sysfs cle... |
1575 |
if (info->sechdrs[i].sh_type == SHT_NOTE) { |
361795b1e sysfs: Use sysfs_... |
1576 |
sysfs_bin_attr_init(nattr); |
6d7601338 Add /sys/module/n... |
1577 1578 |
nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; |
8f6d03781 module: sysfs cle... |
1579 1580 |
nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *) info->sechdrs[i].sh_addr; |
6d7601338 Add /sys/module/n... |
1581 1582 1583 1584 1585 |
nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1586 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 |
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 |
1607 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1608 |
|
8f6d03781 module: sysfs cle... |
1609 1610 |
static inline void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1611 1612 1613 1614 1615 1616 |
{ } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1617 |
|
8f6d03781 module: sysfs cle... |
1618 1619 |
static inline void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1620 1621 1622 1623 1624 1625 |
{ } static inline void remove_notes_attrs(struct module *mod) { } |
8f6d03781 module: sysfs cle... |
1626 |
#endif /* CONFIG_KALLSYMS */ |
1da177e4c Linux-2.6.12-rc2 |
1627 |
|
1ba5c08b5 kernel/module.c: ... |
1628 |
static void del_usage_links(struct module *mod) |
80a3d1bb4 module: move sysf... |
1629 1630 1631 |
{ #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
80a3d1bb4 module: move sysf... |
1632 |
|
75676500f module: make lock... |
1633 |
mutex_lock(&module_mutex); |
1ba5c08b5 kernel/module.c: ... |
1634 1635 |
list_for_each_entry(use, &mod->target_list, target_list) sysfs_remove_link(use->target->holders_dir, mod->name); |
75676500f module: make lock... |
1636 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1637 1638 |
#endif } |
1ba5c08b5 kernel/module.c: ... |
1639 |
static int add_usage_links(struct module *mod) |
80a3d1bb4 module: move sysf... |
1640 |
{ |
1ba5c08b5 kernel/module.c: ... |
1641 |
int ret = 0; |
80a3d1bb4 module: move sysf... |
1642 1643 |
#ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
75676500f module: make lock... |
1644 |
mutex_lock(&module_mutex); |
1ba5c08b5 kernel/module.c: ... |
1645 1646 1647 1648 1649 1650 |
list_for_each_entry(use, &mod->target_list, target_list) { ret = sysfs_create_link(use->target->holders_dir, &mod->mkobj.kobj, mod->name); if (ret) break; } |
75676500f module: make lock... |
1651 |
mutex_unlock(&module_mutex); |
1ba5c08b5 kernel/module.c: ... |
1652 1653 |
if (ret) del_usage_links(mod); |
80a3d1bb4 module: move sysf... |
1654 |
#endif |
1ba5c08b5 kernel/module.c: ... |
1655 |
return ret; |
80a3d1bb4 module: move sysf... |
1656 |
} |
bc6f2a757 kernel/module: Fi... |
1657 |
static void module_remove_modinfo_attrs(struct module *mod, int end); |
6407ebb27 module: Make modu... |
1658 |
static int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1659 1660 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1661 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1662 1663 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1664 1665 1666 1667 1668 1669 1670 |
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; |
bc6f2a757 kernel/module: Fi... |
1671 |
for (i = 0; (attr = modinfo_attrs[i]); i++) { |
c75b590d6 module: fix redun... |
1672 |
if (!attr->test || attr->test(mod)) { |
03e88ae1b [PATCH] fix modul... |
1673 |
memcpy(temp_attr, attr, sizeof(*temp_attr)); |
361795b1e sysfs: Use sysfs_... |
1674 |
sysfs_attr_init(&temp_attr->attr); |
6da0b5651 kernel:module Fix... |
1675 1676 |
error = sysfs_create_file(&mod->mkobj.kobj, &temp_attr->attr); |
bc6f2a757 kernel/module: Fi... |
1677 1678 |
if (error) goto error_out; |
03e88ae1b [PATCH] fix modul... |
1679 1680 |
++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1681 |
} |
bc6f2a757 kernel/module: Fi... |
1682 1683 1684 1685 1686 1687 |
return 0; error_out: if (i > 0) module_remove_modinfo_attrs(mod, --i); |
f60672166 kernel/module: Fi... |
1688 1689 |
else kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1690 1691 |
return error; } |
bc6f2a757 kernel/module: Fi... |
1692 |
static void module_remove_modinfo_attrs(struct module *mod, int end) |
c988d2b28 [PATCH] modules: ... |
1693 1694 1695 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1696 |
for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) { |
bc6f2a757 kernel/module: Fi... |
1697 1698 |
if (end >= 0 && i > end) break; |
03e88ae1b [PATCH] fix modul... |
1699 1700 1701 |
/* pick a field to test for end of list */ if (!attr->attr.name) break; |
6da0b5651 kernel:module Fix... |
1702 |
sysfs_remove_file(&mod->mkobj.kobj, &attr->attr); |
03e88ae1b [PATCH] fix modul... |
1703 1704 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1705 |
} |
03e88ae1b [PATCH] fix modul... |
1706 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1707 |
} |
1da177e4c Linux-2.6.12-rc2 |
1708 |
|
942e44312 module: Fix mod->... |
1709 1710 1711 1712 1713 1714 1715 |
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... |
1716 |
static int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1717 1718 |
{ int err; |
6494a93d5 Module: check to ... |
1719 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1720 |
|
823bccfc4 remove "struct su... |
1721 |
if (!module_sysfs_initialized) { |
bddb12b32 kernel/module.c: ... |
1722 1723 |
pr_err("%s: module sysfs not initialized ", mod->name); |
1cc5f7142 [PATCH] load_modu... |
1724 1725 1726 |
err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1727 1728 1729 |
kobj = kset_find_obj(module_kset, mod->name); if (kobj) { |
bddb12b32 kernel/module.c: ... |
1730 1731 |
pr_err("%s: module is already loaded ", mod->name); |
6494a93d5 Module: check to ... |
1732 1733 1734 1735 |
kobject_put(kobj); err = -EINVAL; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1736 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1737 |
|
ac3c8141f Kobject: convert ... |
1738 1739 1740 1741 1742 |
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->... |
1743 |
mod_kobject_put(mod); |
270a6c4ca /sys/modules/*/ho... |
1744 |
|
97c146ef0 sysfs: fix /sys/m... |
1745 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1746 1747 1748 |
out: return err; } |
6407ebb27 module: Make modu... |
1749 |
static int mod_sysfs_setup(struct module *mod, |
8f6d03781 module: sysfs cle... |
1750 |
const struct load_info *info, |
270a6c4ca /sys/modules/*/ho... |
1751 1752 1753 1754 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
80a3d1bb4 module: move sysf... |
1755 1756 1757 |
err = mod_sysfs_init(mod); if (err) goto out; |
4ff6abff8 kobject: get rid ... |
1758 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1759 1760 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1761 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1762 |
} |
270a6c4ca /sys/modules/*/ho... |
1763 |
|
1da177e4c Linux-2.6.12-rc2 |
1764 1765 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1766 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1767 |
|
c988d2b28 [PATCH] modules: ... |
1768 1769 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1770 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1771 |
|
1ba5c08b5 kernel/module.c: ... |
1772 1773 1774 |
err = add_usage_links(mod); if (err) goto out_unreg_modinfo_attrs; |
8f6d03781 module: sysfs cle... |
1775 1776 |
add_sect_attrs(mod, info); add_notes_attrs(mod, info); |
80a3d1bb4 module: move sysf... |
1777 |
|
e17e0f51a Driver core: show... |
1778 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1779 |
return 0; |
1ba5c08b5 kernel/module.c: ... |
1780 |
out_unreg_modinfo_attrs: |
bc6f2a757 kernel/module: Fi... |
1781 |
module_remove_modinfo_attrs(mod, -1); |
e17e0f51a Driver core: show... |
1782 1783 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1784 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1785 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1786 |
out_unreg: |
942e44312 module: Fix mod->... |
1787 |
mod_kobject_put(mod); |
80a3d1bb4 module: move sysf... |
1788 |
out: |
1da177e4c Linux-2.6.12-rc2 |
1789 1790 |
return err; } |
34e4e2fef modules: proper c... |
1791 1792 1793 |
static void mod_sysfs_fini(struct module *mod) { |
8f6d03781 module: sysfs cle... |
1794 1795 |
remove_notes_attrs(mod); remove_sect_attrs(mod); |
942e44312 module: Fix mod->... |
1796 |
mod_kobject_put(mod); |
34e4e2fef modules: proper c... |
1797 |
} |
cf2fde7b3 param: fix module... |
1798 1799 1800 1801 |
static void init_param_lock(struct module *mod) { mutex_init(&mod->param_lock); } |
8f6d03781 module: sysfs cle... |
1802 |
#else /* !CONFIG_SYSFS */ |
34e4e2fef modules: proper c... |
1803 |
|
8f6d03781 module: sysfs cle... |
1804 1805 |
static int mod_sysfs_setup(struct module *mod, const struct load_info *info, |
6407ebb27 module: Make modu... |
1806 1807 1808 1809 1810 |
struct kernel_param *kparam, unsigned int num_params) { return 0; } |
34e4e2fef modules: proper c... |
1811 1812 1813 |
static void mod_sysfs_fini(struct module *mod) { } |
bc6f2a757 kernel/module: Fi... |
1814 |
static void module_remove_modinfo_attrs(struct module *mod, int end) |
36b0360d1 module: fix sysfs... |
1815 1816 |
{ } |
80a3d1bb4 module: move sysf... |
1817 1818 1819 |
static void del_usage_links(struct module *mod) { } |
cf2fde7b3 param: fix module... |
1820 1821 1822 |
static void init_param_lock(struct module *mod) { } |
34e4e2fef modules: proper c... |
1823 |
#endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1824 |
|
36b0360d1 module: fix sysfs... |
1825 |
static void mod_sysfs_teardown(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1826 |
{ |
80a3d1bb4 module: move sysf... |
1827 |
del_usage_links(mod); |
bc6f2a757 kernel/module: Fi... |
1828 |
module_remove_modinfo_attrs(mod, -1); |
1da177e4c Linux-2.6.12-rc2 |
1829 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1830 1831 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1832 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1833 |
} |
93651f80d modules: fix comp... |
1834 |
#ifdef CONFIG_ARCH_HAS_STRICT_MODULE_RWX |
84e1c6bb3 x86: Add RO/NX pr... |
1835 1836 1837 |
/* * LKM RO/NX protection: protect module's text/ro-data * from modification and any data from execution. |
85c898db6 module: clean up ... |
1838 1839 |
* * General layout of module is: |
444d13ff1 modules: add ro_a... |
1840 1841 1842 1843 1844 |
* [text] [read-only-data] [ro-after-init] [writable data] * text_size -----^ ^ ^ ^ * ro_size ------------------------| | | * ro_after_init_size -----------------------------| | * size -----------------------------------------------------------| |
85c898db6 module: clean up ... |
1845 1846 |
* * These values are always page-aligned (as is base) |
84e1c6bb3 x86: Add RO/NX pr... |
1847 |
*/ |
85c898db6 module: clean up ... |
1848 1849 |
static void frob_text(const struct module_layout *layout, int (*set_memory)(unsigned long start, int num_pages)) |
84e1c6bb3 x86: Add RO/NX pr... |
1850 |
{ |
85c898db6 module: clean up ... |
1851 1852 1853 1854 |
BUG_ON((unsigned long)layout->base & (PAGE_SIZE-1)); BUG_ON((unsigned long)layout->text_size & (PAGE_SIZE-1)); set_memory((unsigned long)layout->base, layout->text_size >> PAGE_SHIFT); |
84e1c6bb3 x86: Add RO/NX pr... |
1855 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1856 |
|
93651f80d modules: fix comp... |
1857 |
#ifdef CONFIG_STRICT_MODULE_RWX |
85c898db6 module: clean up ... |
1858 1859 |
static void frob_rodata(const struct module_layout *layout, int (*set_memory)(unsigned long start, int num_pages)) |
84e1c6bb3 x86: Add RO/NX pr... |
1860 |
{ |
85c898db6 module: clean up ... |
1861 1862 1863 1864 1865 |
BUG_ON((unsigned long)layout->base & (PAGE_SIZE-1)); BUG_ON((unsigned long)layout->text_size & (PAGE_SIZE-1)); BUG_ON((unsigned long)layout->ro_size & (PAGE_SIZE-1)); set_memory((unsigned long)layout->base + layout->text_size, (layout->ro_size - layout->text_size) >> PAGE_SHIFT); |
84e1c6bb3 x86: Add RO/NX pr... |
1866 |
} |
444d13ff1 modules: add ro_a... |
1867 1868 1869 1870 1871 1872 1873 1874 1875 |
static void frob_ro_after_init(const struct module_layout *layout, int (*set_memory)(unsigned long start, int num_pages)) { BUG_ON((unsigned long)layout->base & (PAGE_SIZE-1)); BUG_ON((unsigned long)layout->ro_size & (PAGE_SIZE-1)); BUG_ON((unsigned long)layout->ro_after_init_size & (PAGE_SIZE-1)); set_memory((unsigned long)layout->base + layout->ro_size, (layout->ro_after_init_size - layout->ro_size) >> PAGE_SHIFT); } |
85c898db6 module: clean up ... |
1876 1877 |
static void frob_writable_data(const struct module_layout *layout, int (*set_memory)(unsigned long start, int num_pages)) |
84e1c6bb3 x86: Add RO/NX pr... |
1878 |
{ |
85c898db6 module: clean up ... |
1879 |
BUG_ON((unsigned long)layout->base & (PAGE_SIZE-1)); |
444d13ff1 modules: add ro_a... |
1880 |
BUG_ON((unsigned long)layout->ro_after_init_size & (PAGE_SIZE-1)); |
85c898db6 module: clean up ... |
1881 |
BUG_ON((unsigned long)layout->size & (PAGE_SIZE-1)); |
444d13ff1 modules: add ro_a... |
1882 1883 |
set_memory((unsigned long)layout->base + layout->ro_after_init_size, (layout->size - layout->ro_after_init_size) >> PAGE_SHIFT); |
84e1c6bb3 x86: Add RO/NX pr... |
1884 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1885 |
|
85c898db6 module: clean up ... |
1886 1887 |
/* livepatching wants to disable read-only so it can frob module. */ void module_disable_ro(const struct module *mod) |
20ef10c1b module: Use the s... |
1888 |
{ |
39290b389 module: extend 'r... |
1889 1890 |
if (!rodata_enabled) return; |
85c898db6 module: clean up ... |
1891 1892 |
frob_text(&mod->core_layout, set_memory_rw); frob_rodata(&mod->core_layout, set_memory_rw); |
444d13ff1 modules: add ro_a... |
1893 |
frob_ro_after_init(&mod->core_layout, set_memory_rw); |
85c898db6 module: clean up ... |
1894 1895 |
frob_text(&mod->init_layout, set_memory_rw); frob_rodata(&mod->init_layout, set_memory_rw); |
20ef10c1b module: Use the s... |
1896 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1897 |
|
444d13ff1 modules: add ro_a... |
1898 |
void module_enable_ro(const struct module *mod, bool after_init) |
01526ed08 module: split uns... |
1899 |
{ |
39290b389 module: extend 'r... |
1900 1901 |
if (!rodata_enabled) return; |
1a7b7d922 modules: Use vmal... |
1902 1903 |
set_vm_flush_reset_perms(mod->core_layout.base); set_vm_flush_reset_perms(mod->init_layout.base); |
85c898db6 module: clean up ... |
1904 |
frob_text(&mod->core_layout, set_memory_ro); |
f2c65fb32 x86/modules: Avoi... |
1905 |
|
85c898db6 module: clean up ... |
1906 1907 1908 |
frob_rodata(&mod->core_layout, set_memory_ro); frob_text(&mod->init_layout, set_memory_ro); frob_rodata(&mod->init_layout, set_memory_ro); |
444d13ff1 modules: add ro_a... |
1909 1910 1911 |
if (after_init) frob_ro_after_init(&mod->core_layout, set_memory_ro); |
84e1c6bb3 x86: Add RO/NX pr... |
1912 |
} |
85c898db6 module: clean up ... |
1913 |
static void module_enable_nx(const struct module *mod) |
01526ed08 module: split uns... |
1914 |
{ |
85c898db6 module: clean up ... |
1915 |
frob_rodata(&mod->core_layout, set_memory_nx); |
444d13ff1 modules: add ro_a... |
1916 |
frob_ro_after_init(&mod->core_layout, set_memory_nx); |
85c898db6 module: clean up ... |
1917 1918 1919 |
frob_writable_data(&mod->core_layout, set_memory_nx); frob_rodata(&mod->init_layout, set_memory_nx); frob_writable_data(&mod->init_layout, set_memory_nx); |
01526ed08 module: split uns... |
1920 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1921 |
/* Iterate through all modules and set each module's text as RW */ |
5d05c7084 minor ANSI protot... |
1922 |
void set_all_modules_text_rw(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1923 1924 |
{ struct module *mod; |
39290b389 module: extend 'r... |
1925 1926 |
if (!rodata_enabled) return; |
84e1c6bb3 x86: Add RO/NX pr... |
1927 1928 |
mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1929 1930 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
85c898db6 module: clean up ... |
1931 1932 1933 |
frob_text(&mod->core_layout, set_memory_rw); frob_text(&mod->init_layout, set_memory_rw); |
84e1c6bb3 x86: Add RO/NX pr... |
1934 1935 1936 1937 1938 |
} mutex_unlock(&module_mutex); } /* Iterate through all modules and set each module's text as RO */ |
5d05c7084 minor ANSI protot... |
1939 |
void set_all_modules_text_ro(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1940 1941 |
{ struct module *mod; |
39290b389 module: extend 'r... |
1942 1943 |
if (!rodata_enabled) return; |
84e1c6bb3 x86: Add RO/NX pr... |
1944 1945 |
mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
905dd707f module: When modi... |
1946 1947 1948 1949 1950 1951 1952 |
/* * Ignore going modules since it's possible that ro * protection has already been disabled, otherwise we'll * run into protection faults at module deallocation. */ if (mod->state == MODULE_STATE_UNFORMED || mod->state == MODULE_STATE_GOING) |
0d21b0e34 module: add new s... |
1953 |
continue; |
85c898db6 module: clean up ... |
1954 1955 1956 |
frob_text(&mod->core_layout, set_memory_ro); frob_text(&mod->init_layout, set_memory_ro); |
84e1c6bb3 x86: Add RO/NX pr... |
1957 1958 1959 |
} mutex_unlock(&module_mutex); } |
93651f80d modules: fix comp... |
1960 |
#else /* !CONFIG_STRICT_MODULE_RWX */ |
85c898db6 module: clean up ... |
1961 |
static void module_enable_nx(const struct module *mod) { } |
93651f80d modules: fix comp... |
1962 |
#endif /* CONFIG_STRICT_MODULE_RWX */ |
2eef1399a modules: fix BUG ... |
1963 1964 1965 1966 1967 |
static void module_enable_x(const struct module *mod) { frob_text(&mod->core_layout, set_memory_x); frob_text(&mod->init_layout, set_memory_x); } |
93651f80d modules: fix comp... |
1968 1969 1970 1971 |
#else /* !CONFIG_ARCH_HAS_STRICT_MODULE_RWX */ static void module_enable_nx(const struct module *mod) { } static void module_enable_x(const struct module *mod) { } #endif /* CONFIG_ARCH_HAS_STRICT_MODULE_RWX */ |
84e1c6bb3 x86: Add RO/NX pr... |
1972 |
|
1ce15ef4f module: preserve ... |
1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 |
#ifdef CONFIG_LIVEPATCH /* * Persist Elf information about a module. Copy the Elf header, * section header table, section string table, and symtab section * index from info to mod->klp_info. */ static int copy_module_elf(struct module *mod, struct load_info *info) { unsigned int size, symndx; int ret; size = sizeof(*mod->klp_info); mod->klp_info = kmalloc(size, GFP_KERNEL); if (mod->klp_info == NULL) return -ENOMEM; /* Elf header */ size = sizeof(mod->klp_info->hdr); memcpy(&mod->klp_info->hdr, info->hdr, size); /* Elf section header table */ size = sizeof(*info->sechdrs) * info->hdr->e_shnum; |
9be936f4b kernel/module: Us... |
1995 |
mod->klp_info->sechdrs = kmemdup(info->sechdrs, size, GFP_KERNEL); |
1ce15ef4f module: preserve ... |
1996 1997 1998 1999 |
if (mod->klp_info->sechdrs == NULL) { ret = -ENOMEM; goto free_info; } |
1ce15ef4f module: preserve ... |
2000 2001 2002 |
/* Elf section name string table */ size = info->sechdrs[info->hdr->e_shstrndx].sh_size; |
9be936f4b kernel/module: Us... |
2003 |
mod->klp_info->secstrings = kmemdup(info->secstrings, size, GFP_KERNEL); |
1ce15ef4f module: preserve ... |
2004 2005 2006 2007 |
if (mod->klp_info->secstrings == NULL) { ret = -ENOMEM; goto free_sechdrs; } |
1ce15ef4f module: preserve ... |
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 |
/* Elf symbol section index */ symndx = info->index.sym; mod->klp_info->symndx = symndx; /* * For livepatch modules, core_kallsyms.symtab is a complete * copy of the original symbol table. Adjust sh_addr to point * to core_kallsyms.symtab since the copy of the symtab in module * init memory is freed at the end of do_init_module(). */ mod->klp_info->sechdrs[symndx].sh_addr = \ (unsigned long) mod->core_kallsyms.symtab; return 0; free_sechdrs: kfree(mod->klp_info->sechdrs); free_info: kfree(mod->klp_info); return ret; } static void free_module_elf(struct module *mod) { kfree(mod->klp_info->sechdrs); kfree(mod->klp_info->secstrings); kfree(mod->klp_info); } #else /* !CONFIG_LIVEPATCH */ static int copy_module_elf(struct module *mod, struct load_info *info) { return 0; } static void free_module_elf(struct module *mod) { } #endif /* CONFIG_LIVEPATCH */ |
be1f221c0 module: remove mo... |
2047 |
void __weak module_memfree(void *module_region) |
74e08fcf7 modules: add defa... |
2048 |
{ |
1a7b7d922 modules: Use vmal... |
2049 2050 2051 2052 2053 |
/* * This memory may be RO, and freeing RO memory in an interrupt is not * supported by vmalloc. */ WARN_ON(in_interrupt()); |
74e08fcf7 modules: add defa... |
2054 2055 2056 2057 2058 2059 |
vfree(module_region); } void __weak module_arch_cleanup(struct module *mod) { } |
d453cded0 module_arch_freei... |
2060 2061 2062 |
void __weak module_arch_freeing_init(struct module *mod) { } |
75676500f module: make lock... |
2063 |
/* Free a module, remove from lists, etc. */ |
1da177e4c Linux-2.6.12-rc2 |
2064 2065 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
2066 |
trace_module_free(mod); |
36b0360d1 module: fix sysfs... |
2067 |
mod_sysfs_teardown(mod); |
1da177e4c Linux-2.6.12-rc2 |
2068 |
|
944a1fa01 module: don't unl... |
2069 2070 |
/* We leave it in list to prevent duplicate loads, but make sure * that noone uses it while it's being deconstructed. */ |
d3051b489 modules, lock aro... |
2071 |
mutex_lock(&module_mutex); |
944a1fa01 module: don't unl... |
2072 |
mod->state = MODULE_STATE_UNFORMED; |
d3051b489 modules, lock aro... |
2073 |
mutex_unlock(&module_mutex); |
944a1fa01 module: don't unl... |
2074 |
|
b82bab4bb dynamic debug: mo... |
2075 2076 |
/* Remove dynamic debug info */ ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
2077 2078 2079 2080 2081 |
/* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
2082 2083 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
1ce15ef4f module: preserve ... |
2084 2085 |
if (is_livepatch_module(mod)) free_module_elf(mod); |
944a1fa01 module: don't unl... |
2086 2087 |
/* Now we can delete it from the lists */ mutex_lock(&module_mutex); |
461e34aed module: Unlink mo... |
2088 2089 |
/* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); |
93c2e105f module: Optimize ... |
2090 |
mod_tree_remove(mod); |
0286b5ea1 lib/bug: Use RCU ... |
2091 |
/* Remove this module from bug list, this uses list_del_rcu */ |
461e34aed module: Unlink mo... |
2092 |
module_bug_cleanup(mod); |
0be964be0 module: Sanitize ... |
2093 |
/* Wait for RCU-sched synchronizing before releasing mod->list and buglist. */ |
cb2f55369 modules: Replace ... |
2094 |
synchronize_rcu(); |
944a1fa01 module: don't unl... |
2095 |
mutex_unlock(&module_mutex); |
85c898db6 module: clean up ... |
2096 |
/* This may be empty, but that's OK */ |
d453cded0 module_arch_freei... |
2097 |
module_arch_freeing_init(mod); |
7523e4dc5 module: use a str... |
2098 |
module_memfree(mod->init_layout.base); |
1da177e4c Linux-2.6.12-rc2 |
2099 |
kfree(mod->args); |
259354dea module: encapsula... |
2100 |
percpu_modfree(mod); |
9f85a4bbb module: refactor ... |
2101 |
|
35a9393c9 lockdep: Fix the ... |
2102 |
/* Free lock-classes; relies on the preceding sync_rcu(). */ |
7523e4dc5 module: use a str... |
2103 |
lockdep_free_key_range(mod->core_layout.base, mod->core_layout.size); |
fbb9ce953 [PATCH] lockdep: ... |
2104 |
|
1da177e4c Linux-2.6.12-rc2 |
2105 |
/* Finally, free the core (containing the module structure) */ |
7523e4dc5 module: use a str... |
2106 |
module_memfree(mod->core_layout.base); |
1da177e4c Linux-2.6.12-rc2 |
2107 2108 2109 2110 2111 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
2112 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
2113 |
|
24da1cbff modules: remove m... |
2114 |
preempt_disable(); |
414fd31b2 module: Make find... |
2115 2116 2117 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
2118 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2119 |
|
7290d5809 module: use relat... |
2120 |
return sym ? (void *)kernel_symbol_value(sym) : NULL; |
1da177e4c Linux-2.6.12-rc2 |
2121 2122 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
2123 2124 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
2125 |
* in the kernel or in some other module's exported symbol table. |
be593f4ce module: verify_ex... |
2126 2127 |
* * You must hold the module_mutex. |
eea8b54dc [PATCH] modules: ... |
2128 |
*/ |
2d25bc552 module: make it c... |
2129 |
static int verify_exported_symbols(struct module *mod) |
eea8b54dc [PATCH] modules: ... |
2130 |
{ |
b211104d1 module: Enhance v... |
2131 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
2132 |
struct module *owner; |
b211104d1 module: Enhance v... |
2133 2134 2135 2136 2137 2138 2139 2140 |
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... |
2141 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
2142 2143 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
2144 |
#endif |
b211104d1 module: Enhance v... |
2145 |
}; |
eea8b54dc [PATCH] modules: ... |
2146 |
|
b211104d1 module: Enhance v... |
2147 2148 |
for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { |
7290d5809 module: use relat... |
2149 2150 |
if (find_symbol(kernel_symbol_name(s), &owner, NULL, true, false)) { |
bddb12b32 kernel/module.c: ... |
2151 |
pr_err("%s: exports duplicate symbol %s" |
b211104d1 module: Enhance v... |
2152 2153 |
" (owned by %s) ", |
7290d5809 module: use relat... |
2154 2155 |
mod->name, kernel_symbol_name(s), module_name(owner)); |
b211104d1 module: Enhance v... |
2156 2157 |
return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
2158 |
} |
b211104d1 module: Enhance v... |
2159 2160 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
2161 |
} |
9a4b9708f module: fix and e... |
2162 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
49668688d module: pass load... |
2163 2164 2165 2166 |
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 |
2167 |
unsigned long secbase; |
49668688d module: pass load... |
2168 |
unsigned int i; |
1da177e4c Linux-2.6.12-rc2 |
2169 |
int ret = 0; |
414fd31b2 module: Make find... |
2170 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
2171 |
|
49668688d module: pass load... |
2172 2173 |
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 |
2174 2175 |
switch (sym[i].st_shndx) { case SHN_COMMON: |
80375980f lto: Handle LTO c... |
2176 2177 2178 |
/* Ignore common symbols */ if (!strncmp(name, "__gnu_lto", 9)) break; |
1da177e4c Linux-2.6.12-rc2 |
2179 2180 |
/* We compiled with -fno-common. These are not supposed to happen. */ |
5e1241692 module: replace D... |
2181 2182 |
pr_debug("Common symbol: %s ", name); |
6da0b5651 kernel:module Fix... |
2183 2184 |
pr_warn("%s: please compile with -fno-common ", |
1da177e4c Linux-2.6.12-rc2 |
2185 2186 2187 2188 2189 2190 |
mod->name); ret = -ENOEXEC; break; case SHN_ABS: /* Don't need to do anything */ |
5e1241692 module: replace D... |
2191 2192 |
pr_debug("Absolute symbol: 0x%08lx ", |
1da177e4c Linux-2.6.12-rc2 |
2193 2194 |
(long)sym[i].st_value); break; |
1ce15ef4f module: preserve ... |
2195 2196 2197 |
case SHN_LIVEPATCH: /* Livepatch symbols are resolved by livepatch */ break; |
1da177e4c Linux-2.6.12-rc2 |
2198 |
case SHN_UNDEF: |
49668688d module: pass load... |
2199 |
ksym = resolve_symbol_wait(mod, info, name); |
1da177e4c Linux-2.6.12-rc2 |
2200 |
/* Ok if resolved. */ |
9bea7f239 module: fix bne2 ... |
2201 |
if (ksym && !IS_ERR(ksym)) { |
7290d5809 module: use relat... |
2202 |
sym[i].st_value = kernel_symbol_value(ksym); |
1da177e4c Linux-2.6.12-rc2 |
2203 |
break; |
414fd31b2 module: Make find... |
2204 |
} |
1da177e4c Linux-2.6.12-rc2 |
2205 |
/* Ok if weak. */ |
9bea7f239 module: fix bne2 ... |
2206 |
if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) |
1da177e4c Linux-2.6.12-rc2 |
2207 |
break; |
9bea7f239 module: fix bne2 ... |
2208 |
ret = PTR_ERR(ksym) ?: -ENOENT; |
62267e0ec module: print sen... |
2209 2210 2211 |
pr_warn("%s: Unknown symbol %s (err %d) ", mod->name, name, ret); |
1da177e4c Linux-2.6.12-rc2 |
2212 2213 2214 2215 |
break; default: /* Divert to percpu allocation if a percpu var. */ |
49668688d module: pass load... |
2216 |
if (sym[i].st_shndx == info->index.pcpu) |
259354dea module: encapsula... |
2217 |
secbase = (unsigned long)mod_percpu(mod); |
1da177e4c Linux-2.6.12-rc2 |
2218 |
else |
49668688d module: pass load... |
2219 |
secbase = info->sechdrs[sym[i].st_shndx].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
2220 2221 2222 2223 2224 2225 2226 |
sym[i].st_value += secbase; break; } } return ret; } |
49668688d module: pass load... |
2227 |
static int apply_relocations(struct module *mod, const struct load_info *info) |
22e268ebe module: refactor ... |
2228 2229 2230 2231 2232 |
{ unsigned int i; int err = 0; /* Now do relocations. */ |
49668688d module: pass load... |
2233 2234 |
for (i = 1; i < info->hdr->e_shnum; i++) { unsigned int infosec = info->sechdrs[i].sh_info; |
22e268ebe module: refactor ... |
2235 2236 |
/* Not a valid relocation section? */ |
49668688d module: pass load... |
2237 |
if (infosec >= info->hdr->e_shnum) |
22e268ebe module: refactor ... |
2238 2239 2240 |
continue; /* Don't bother with non-allocated sections */ |
49668688d module: pass load... |
2241 |
if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) |
22e268ebe module: refactor ... |
2242 |
continue; |
1ce15ef4f module: preserve ... |
2243 2244 2245 |
/* Livepatch relocation sections are applied by livepatch */ if (info->sechdrs[i].sh_flags & SHF_RELA_LIVEPATCH) continue; |
49668688d module: pass load... |
2246 2247 2248 2249 2250 2251 |
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 ... |
2252 2253 2254 2255 2256 |
if (err < 0) break; } return err; } |
088af9a6e module: fix modul... |
2257 2258 2259 2260 2261 2262 2263 |
/* 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 |
2264 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
2265 2266 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
2267 2268 |
{ long ret; |
088af9a6e module: fix modul... |
2269 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
2270 2271 2272 2273 2274 2275 2276 2277 2278 |
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... |
2279 |
static void layout_sections(struct module *mod, struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2280 2281 2282 2283 2284 2285 2286 |
{ 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 }, |
444d13ff1 modules: add ro_a... |
2287 |
{ SHF_RO_AFTER_INIT | SHF_ALLOC, ARCH_SHF_SMALL }, |
1da177e4c Linux-2.6.12-rc2 |
2288 2289 2290 2291 |
{ SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL }, { ARCH_SHF_SMALL | SHF_ALLOC, 0 } }; unsigned int m, i; |
49668688d module: pass load... |
2292 2293 |
for (i = 0; i < info->hdr->e_shnum; i++) info->sechdrs[i].sh_entsize = ~0UL; |
1da177e4c Linux-2.6.12-rc2 |
2294 |
|
5e1241692 module: replace D... |
2295 2296 |
pr_debug("Core section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
2297 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
2298 2299 2300 |
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 |
2301 2302 2303 2304 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2305 |
|| strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2306 |
continue; |
7523e4dc5 module: use a str... |
2307 |
s->sh_entsize = get_offset(mod, &mod->core_layout.size, s, i); |
5e1241692 module: replace D... |
2308 2309 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2310 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2311 2312 |
switch (m) { case 0: /* executable */ |
7523e4dc5 module: use a str... |
2313 2314 |
mod->core_layout.size = debug_align(mod->core_layout.size); mod->core_layout.text_size = mod->core_layout.size; |
84e1c6bb3 x86: Add RO/NX pr... |
2315 2316 |
break; case 1: /* RO: text and ro-data */ |
7523e4dc5 module: use a str... |
2317 2318 |
mod->core_layout.size = debug_align(mod->core_layout.size); mod->core_layout.ro_size = mod->core_layout.size; |
84e1c6bb3 x86: Add RO/NX pr... |
2319 |
break; |
444d13ff1 modules: add ro_a... |
2320 2321 2322 2323 2324 |
case 2: /* RO after init */ mod->core_layout.size = debug_align(mod->core_layout.size); mod->core_layout.ro_after_init_size = mod->core_layout.size; break; case 4: /* whole core */ |
7523e4dc5 module: use a str... |
2325 |
mod->core_layout.size = debug_align(mod->core_layout.size); |
84e1c6bb3 x86: Add RO/NX pr... |
2326 2327 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
2328 |
} |
5e1241692 module: replace D... |
2329 2330 |
pr_debug("Init section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
2331 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
2332 2333 2334 |
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 |
2335 2336 2337 2338 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2339 |
|| !strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2340 |
continue; |
7523e4dc5 module: use a str... |
2341 |
s->sh_entsize = (get_offset(mod, &mod->init_layout.size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
2342 |
| INIT_OFFSET_MASK); |
5e1241692 module: replace D... |
2343 2344 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2345 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2346 2347 |
switch (m) { case 0: /* executable */ |
7523e4dc5 module: use a str... |
2348 2349 |
mod->init_layout.size = debug_align(mod->init_layout.size); mod->init_layout.text_size = mod->init_layout.size; |
84e1c6bb3 x86: Add RO/NX pr... |
2350 2351 |
break; case 1: /* RO: text and ro-data */ |
7523e4dc5 module: use a str... |
2352 2353 |
mod->init_layout.size = debug_align(mod->init_layout.size); mod->init_layout.ro_size = mod->init_layout.size; |
84e1c6bb3 x86: Add RO/NX pr... |
2354 |
break; |
444d13ff1 modules: add ro_a... |
2355 2356 2357 2358 2359 2360 2361 2362 |
case 2: /* * RO after init doesn't apply to init_layout (only * core_layout), so it just takes the value of ro_size. */ mod->init_layout.ro_after_init_size = mod->init_layout.ro_size; break; case 4: /* whole init */ |
7523e4dc5 module: use a str... |
2363 |
mod->init_layout.size = debug_align(mod->init_layout.size); |
84e1c6bb3 x86: Add RO/NX pr... |
2364 2365 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
2366 2367 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2368 2369 2370 2371 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
2372 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
2373 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
bddb12b32 kernel/module.c: ... |
2374 2375 2376 |
pr_warn("%s: module license '%s' taints kernel. ", mod->name, license); |
373d4d099 taint: add explic... |
2377 2378 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 |
} } /* 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; } |
c5e4a062f module: support r... |
2400 2401 |
static char *get_next_modinfo(const struct load_info *info, const char *tag, char *prev) |
1da177e4c Linux-2.6.12-rc2 |
2402 2403 2404 |
{ char *p; unsigned int taglen = strlen(tag); |
49668688d module: pass load... |
2405 2406 |
Elf_Shdr *infosec = &info->sechdrs[info->index.info]; unsigned long size = infosec->sh_size; |
1da177e4c Linux-2.6.12-rc2 |
2407 |
|
5fdc7db64 module: setup loa... |
2408 2409 2410 2411 |
/* * get_modinfo() calls made before rewrite_section_headers() * must use sh_offset, as sh_addr isn't set! */ |
c5e4a062f module: support r... |
2412 2413 2414 2415 2416 2417 2418 2419 |
char *modinfo = (char *)info->hdr + infosec->sh_offset; if (prev) { size -= prev - modinfo; modinfo = next_string(prev, &size); } for (p = modinfo; p; p = next_string(p, &size)) { |
1da177e4c Linux-2.6.12-rc2 |
2420 2421 2422 2423 2424 |
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
c5e4a062f module: support r... |
2425 2426 2427 2428 |
static char *get_modinfo(const struct load_info *info, const char *tag) { return get_next_modinfo(info, tag, NULL); } |
49668688d module: pass load... |
2429 |
static void setup_modinfo(struct module *mod, struct load_info *info) |
c988d2b28 [PATCH] modules: ... |
2430 2431 2432 2433 2434 2435 |
{ struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) |
49668688d module: pass load... |
2436 |
attr->setup(mod, get_modinfo(info, attr->attr.name)); |
c988d2b28 [PATCH] modules: ... |
2437 2438 |
} } |
c988d2b28 [PATCH] modules: ... |
2439 |
|
a263f7763 module: fix memor... |
2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 |
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 |
2450 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
2451 |
|
2d25bc552 module: make it c... |
2452 2453 2454 2455 |
/* Lookup exported symbol in given range of kernel_symbols */ static const struct kernel_symbol *lookup_exported_symbol(const char *name, const struct kernel_symbol *start, const struct kernel_symbol *stop) |
15bba37d6 module: fix build... |
2456 |
{ |
9d63487f8 module: Use binar... |
2457 2458 |
return bsearch(name, start, stop - start, sizeof(struct kernel_symbol), cmp_name); |
15bba37d6 module: fix build... |
2459 |
} |
ca4787b77 kernel/module.c: ... |
2460 2461 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
2462 |
{ |
ca4787b77 kernel/module.c: ... |
2463 2464 |
const struct kernel_symbol *ks; if (!mod) |
2d25bc552 module: make it c... |
2465 |
ks = lookup_exported_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
2466 |
else |
2d25bc552 module: make it c... |
2467 |
ks = lookup_exported_symbol(name, mod->syms, mod->syms + mod->num_syms); |
7290d5809 module: use relat... |
2468 |
return ks != NULL && kernel_symbol_value(ks) == value; |
1da177e4c Linux-2.6.12-rc2 |
2469 2470 2471 |
} /* As per nm */ |
eded41c1c module: kallsyms ... |
2472 |
static char elf_type(const Elf_Sym *sym, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2473 |
{ |
eded41c1c module: kallsyms ... |
2474 |
const Elf_Shdr *sechdrs = info->sechdrs; |
1da177e4c Linux-2.6.12-rc2 |
2475 2476 2477 2478 2479 2480 2481 2482 |
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'; |
e02244185 module: keep perc... |
2483 |
if (sym->st_shndx == SHN_ABS || sym->st_shndx == info->index.pcpu) |
1da177e4c Linux-2.6.12-rc2 |
2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 |
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 ... |
2504 2505 |
if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) { |
1da177e4c Linux-2.6.12-rc2 |
2506 |
return 'n'; |
eded41c1c module: kallsyms ... |
2507 |
} |
1da177e4c Linux-2.6.12-rc2 |
2508 2509 |
return '?'; } |
4a4962263 module: reduce sy... |
2510 |
static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, |
e02244185 module: keep perc... |
2511 |
unsigned int shnum, unsigned int pcpundx) |
4a4962263 module: reduce sy... |
2512 2513 2514 2515 2516 2517 2518 |
{ const Elf_Shdr *sec; if (src->st_shndx == SHN_UNDEF || src->st_shndx >= shnum || !src->st_name) return false; |
e02244185 module: keep perc... |
2519 2520 2521 2522 |
#ifdef CONFIG_KALLSYMS_ALL if (src->st_shndx == pcpundx) return true; #endif |
4a4962263 module: reduce sy... |
2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 |
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... |
2533 2534 2535 2536 2537 2538 2539 |
/* * 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... |
2540 |
static void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2541 |
{ |
49668688d module: pass load... |
2542 2543 |
Elf_Shdr *symsect = info->sechdrs + info->index.sym; Elf_Shdr *strsect = info->sechdrs + info->index.str; |
4a4962263 module: reduce sy... |
2544 |
const Elf_Sym *src; |
54523ec71 module: Remove a ... |
2545 |
unsigned int i, nsrc, ndst, strtab_size = 0; |
4a4962263 module: reduce sy... |
2546 2547 2548 |
/* Put symbol section at end of init part of module. */ symsect->sh_flags |= SHF_ALLOC; |
7523e4dc5 module: use a str... |
2549 |
symsect->sh_entsize = get_offset(mod, &mod->init_layout.size, symsect, |
49668688d module: pass load... |
2550 |
info->index.sym) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2551 2552 |
pr_debug("\t%s ", info->secstrings + symsect->sh_name); |
4a4962263 module: reduce sy... |
2553 |
|
49668688d module: pass load... |
2554 |
src = (void *)info->hdr + symsect->sh_offset; |
4a4962263 module: reduce sy... |
2555 |
nsrc = symsect->sh_size / sizeof(*src); |
70b1e9161 module: Add comme... |
2556 |
|
48fd11880 module: Fix perfo... |
2557 |
/* Compute total space required for the core symbols' strtab. */ |
59ef28b1f module: fix out-b... |
2558 |
for (ndst = i = 0; i < nsrc; i++) { |
1ce15ef4f module: preserve ... |
2559 |
if (i == 0 || is_livepatch_module(mod) || |
e02244185 module: keep perc... |
2560 2561 |
is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum, info->index.pcpu)) { |
59ef28b1f module: fix out-b... |
2562 |
strtab_size += strlen(&info->strtab[src[i].st_name])+1; |
48fd11880 module: Fix perfo... |
2563 |
ndst++; |
554bdfe5a module: reduce st... |
2564 |
} |
59ef28b1f module: fix out-b... |
2565 |
} |
4a4962263 module: reduce sy... |
2566 2567 |
/* Append room for core symbols at end of core part. */ |
7523e4dc5 module: use a str... |
2568 2569 2570 |
info->symoffs = ALIGN(mod->core_layout.size, symsect->sh_addralign ?: 1); info->stroffs = mod->core_layout.size = info->symoffs + ndst * sizeof(Elf_Sym); mod->core_layout.size += strtab_size; |
1c7651f43 kallsyms: store t... |
2571 2572 |
info->core_typeoffs = mod->core_layout.size; mod->core_layout.size += ndst * sizeof(char); |
7523e4dc5 module: use a str... |
2573 |
mod->core_layout.size = debug_align(mod->core_layout.size); |
4a4962263 module: reduce sy... |
2574 |
|
554bdfe5a module: reduce st... |
2575 2576 |
/* Put string table section at end of init part of module. */ strsect->sh_flags |= SHF_ALLOC; |
7523e4dc5 module: use a str... |
2577 |
strsect->sh_entsize = get_offset(mod, &mod->init_layout.size, strsect, |
49668688d module: pass load... |
2578 |
info->index.str) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2579 2580 |
pr_debug("\t%s ", info->secstrings + strsect->sh_name); |
8244062ef modules: fix long... |
2581 2582 2583 2584 2585 2586 |
/* We'll tack temporary mod_kallsyms on the end. */ mod->init_layout.size = ALIGN(mod->init_layout.size, __alignof__(struct mod_kallsyms)); info->mod_kallsyms_init_off = mod->init_layout.size; mod->init_layout.size += sizeof(struct mod_kallsyms); |
1c7651f43 kallsyms: store t... |
2587 2588 |
info->init_typeoffs = mod->init_layout.size; mod->init_layout.size += nsrc * sizeof(char); |
8244062ef modules: fix long... |
2589 |
mod->init_layout.size = debug_align(mod->init_layout.size); |
4a4962263 module: reduce sy... |
2590 |
} |
8244062ef modules: fix long... |
2591 2592 2593 2594 2595 |
/* * We use the full symtab and strtab which layout_symtab arranged to * be appended to the init section. Later we switch to the cut-down * core-only ones. */ |
811d66a0e module: group pos... |
2596 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2597 |
{ |
4a4962263 module: reduce sy... |
2598 2599 2600 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
2601 |
char *s; |
eded41c1c module: kallsyms ... |
2602 |
Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; |
1da177e4c Linux-2.6.12-rc2 |
2603 |
|
8244062ef modules: fix long... |
2604 2605 2606 2607 2608 |
/* Set up to point into init section. */ mod->kallsyms = mod->init_layout.base + info->mod_kallsyms_init_off; mod->kallsyms->symtab = (void *)symsec->sh_addr; mod->kallsyms->num_symtab = symsec->sh_size / sizeof(Elf_Sym); |
511ca6ae4 module: fix crash... |
2609 |
/* Make sure we get permanent strtab: don't use info->strtab. */ |
8244062ef modules: fix long... |
2610 |
mod->kallsyms->strtab = (void *)info->sechdrs[info->index.str].sh_addr; |
1c7651f43 kallsyms: store t... |
2611 |
mod->kallsyms->typetab = mod->init_layout.base + info->init_typeoffs; |
1da177e4c Linux-2.6.12-rc2 |
2612 |
|
1c7651f43 kallsyms: store t... |
2613 2614 2615 2616 |
/* * Now populate the cut down core kallsyms for after init * and set types up while we still have access to sections. */ |
8244062ef modules: fix long... |
2617 2618 |
mod->core_kallsyms.symtab = dst = mod->core_layout.base + info->symoffs; mod->core_kallsyms.strtab = s = mod->core_layout.base + info->stroffs; |
1c7651f43 kallsyms: store t... |
2619 |
mod->core_kallsyms.typetab = mod->core_layout.base + info->core_typeoffs; |
8244062ef modules: fix long... |
2620 2621 |
src = mod->kallsyms->symtab; for (ndst = i = 0; i < mod->kallsyms->num_symtab; i++) { |
1c7651f43 kallsyms: store t... |
2622 |
mod->kallsyms->typetab[i] = elf_type(src + i, info); |
1ce15ef4f module: preserve ... |
2623 |
if (i == 0 || is_livepatch_module(mod) || |
e02244185 module: keep perc... |
2624 2625 |
is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum, info->index.pcpu)) { |
1c7651f43 kallsyms: store t... |
2626 2627 |
mod->core_kallsyms.typetab[ndst] = mod->kallsyms->typetab[i]; |
59ef28b1f module: fix out-b... |
2628 |
dst[ndst] = src[i]; |
8244062ef modules: fix long... |
2629 2630 |
dst[ndst++].st_name = s - mod->core_kallsyms.strtab; s += strlcpy(s, &mod->kallsyms->strtab[src[i].st_name], |
59ef28b1f module: fix out-b... |
2631 2632 |
KSYM_NAME_LEN) + 1; } |
4a4962263 module: reduce sy... |
2633 |
} |
8244062ef modules: fix long... |
2634 |
mod->core_kallsyms.num_symtab = ndst; |
1da177e4c Linux-2.6.12-rc2 |
2635 2636 |
} #else |
49668688d module: pass load... |
2637 |
static inline void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2638 2639 |
{ } |
3ae91c21d module: fix up CO... |
2640 |
|
abbce906d (trivial) Fix com... |
2641 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2642 2643 2644 |
{ } #endif /* CONFIG_KALLSYMS */ |
527963127 module: fix ddebu... |
2645 |
static void dynamic_debug_setup(struct module *mod, struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
2646 |
{ |
811d66a0e module: group pos... |
2647 2648 |
if (!debug) return; |
513770f54 dynamic_debug: mo... |
2649 |
ddebug_add_module(debug, num, mod->name); |
5e458cc0f module: simplify ... |
2650 |
} |
346e15beb driver core: basi... |
2651 |
|
527963127 module: fix ddebu... |
2652 |
static void dynamic_debug_remove(struct module *mod, struct _ddebug *debug) |
ff49d74ad module: initializ... |
2653 2654 |
{ if (debug) |
527963127 module: fix ddebu... |
2655 |
ddebug_remove_module(mod->name); |
ff49d74ad module: initializ... |
2656 |
} |
74e08fcf7 modules: add defa... |
2657 2658 |
void * __weak module_alloc(unsigned long size) { |
82fab442f modules: don't ha... |
2659 |
return vmalloc_exec(size); |
74e08fcf7 modules: add defa... |
2660 |
} |
38b37d631 module: allow arc... |
2661 2662 2663 2664 |
bool __weak module_exit_section(const char *name) { return strstarts(name, ".exit"); } |
4f2294b6d kmemleak: Add mod... |
2665 |
#ifdef CONFIG_DEBUG_KMEMLEAK |
49668688d module: pass load... |
2666 2667 |
static void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2668 2669 2670 2671 |
{ unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
2672 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2673 |
|
49668688d module: pass load... |
2674 |
for (i = 1; i < info->hdr->e_shnum; i++) { |
06c9494c0 kmemleak: Scan al... |
2675 2676 2677 2678 |
/* 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... |
2679 |
continue; |
49668688d module: pass load... |
2680 2681 |
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, info->sechdrs[i].sh_size, GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2682 2683 2684 |
} } #else |
49668688d module: pass load... |
2685 2686 |
static inline void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2687 2688 2689 |
{ } #endif |
106a4ee25 module: signature... |
2690 |
#ifdef CONFIG_MODULE_SIG |
bca014caa module: Invalidat... |
2691 |
static int module_sig_check(struct load_info *info, int flags) |
106a4ee25 module: signature... |
2692 |
{ |
49fcf732b lockdown: Enforce... |
2693 |
int err = -ENODATA; |
34e1169d9 module: add sysca... |
2694 |
const unsigned long markerlen = sizeof(MODULE_SIG_STRING) - 1; |
49fcf732b lockdown: Enforce... |
2695 |
const char *reason; |
34e1169d9 module: add sysca... |
2696 |
const void *mod = info->hdr; |
caabe2405 MODSIGN: Move the... |
2697 |
|
bca014caa module: Invalidat... |
2698 2699 2700 2701 2702 2703 |
/* * Require flags == 0, as a module with version information * removed is no longer the module that was signed */ if (flags == 0 && info->len > markerlen && |
34e1169d9 module: add sysca... |
2704 |
memcmp(mod + info->len - markerlen, MODULE_SIG_STRING, markerlen) == 0) { |
caabe2405 MODSIGN: Move the... |
2705 |
/* We truncate the module to discard the signature */ |
34e1169d9 module: add sysca... |
2706 |
info->len -= markerlen; |
f314dfea1 modsign: log modu... |
2707 |
err = mod_verify_sig(mod, info); |
106a4ee25 module: signature... |
2708 |
} |
49fcf732b lockdown: Enforce... |
2709 2710 |
switch (err) { case 0: |
106a4ee25 module: signature... |
2711 2712 |
info->sig_ok = true; return 0; |
106a4ee25 module: signature... |
2713 |
|
49fcf732b lockdown: Enforce... |
2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 |
/* We don't permit modules to be loaded into trusted kernels * without a valid signature on them, but if we're not * enforcing, certain errors are non-fatal. */ case -ENODATA: reason = "Loading of unsigned module"; goto decide; case -ENOPKG: reason = "Loading of module with unsupported crypto"; goto decide; case -ENOKEY: reason = "Loading of module with unavailable key"; decide: if (is_module_sig_enforced()) { pr_notice("%s is rejected ", reason); return -EKEYREJECTED; } |
106a4ee25 module: signature... |
2732 |
|
49fcf732b lockdown: Enforce... |
2733 2734 2735 2736 2737 2738 2739 2740 2741 |
return security_locked_down(LOCKDOWN_MODULE_SIGNATURE); /* All other errors are fatal, including nomem, unparseable * signatures and signature check failures - even if signatures * aren't required. */ default: return err; } |
106a4ee25 module: signature... |
2742 2743 |
} #else /* !CONFIG_MODULE_SIG */ |
bca014caa module: Invalidat... |
2744 |
static int module_sig_check(struct load_info *info, int flags) |
106a4ee25 module: signature... |
2745 2746 2747 2748 |
{ return 0; } #endif /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2749 2750 |
/* Sanity checks against invalid binaries, wrong arch, weird elf version. */ static int elf_header_check(struct load_info *info) |
40dd2560e module: refactor ... |
2751 |
{ |
34e1169d9 module: add sysca... |
2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 |
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 ... |
2765 |
|
34e1169d9 module: add sysca... |
2766 2767 |
return 0; } |
3afe9f849 Copy the kernel m... |
2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 |
#define COPY_CHUNK_SIZE (16*PAGE_SIZE) static int copy_chunked_from_user(void *dst, const void __user *usrc, unsigned long len) { do { unsigned long n = min(len, COPY_CHUNK_SIZE); if (copy_from_user(dst, usrc, n) != 0) return -EFAULT; cond_resched(); dst += n; usrc += n; len -= n; } while (len); return 0; } |
1ce15ef4f module: preserve ... |
2784 |
#ifdef CONFIG_LIVEPATCH |
2992ef29a livepatch/module:... |
2785 |
static int check_modinfo_livepatch(struct module *mod, struct load_info *info) |
1ce15ef4f module: preserve ... |
2786 |
{ |
2992ef29a livepatch/module:... |
2787 2788 2789 |
if (get_modinfo(info, "livepatch")) { mod->klp = true; add_taint_module(mod, TAINT_LIVEPATCH, LOCKDEP_STILL_OK); |
7598d167d livepatch/module:... |
2790 2791 2792 |
pr_notice_once("%s: tainting kernel with TAINT_LIVEPATCH ", mod->name); |
2992ef29a livepatch/module:... |
2793 |
} |
1ce15ef4f module: preserve ... |
2794 2795 2796 2797 |
return 0; } #else /* !CONFIG_LIVEPATCH */ |
2992ef29a livepatch/module:... |
2798 |
static int check_modinfo_livepatch(struct module *mod, struct load_info *info) |
1ce15ef4f module: preserve ... |
2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 |
{ if (get_modinfo(info, "livepatch")) { pr_err("%s: module is marked as livepatch module, but livepatch support is disabled", mod->name); return -ENOEXEC; } return 0; } #endif /* CONFIG_LIVEPATCH */ |
caf7501a1 module/retpoline:... |
2809 2810 2811 2812 2813 2814 2815 2816 2817 |
static void check_modinfo_retpoline(struct module *mod, struct load_info *info) { if (retpoline_module_ok(get_modinfo(info, "retpoline"))) return; pr_warn("%s: loading module not compiled with retpoline compiler. ", mod->name); } |
34e1169d9 module: add sysca... |
2818 2819 2820 |
/* 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 ... |
2821 2822 |
{ int err; |
40dd2560e module: refactor ... |
2823 |
|
34e1169d9 module: add sysca... |
2824 2825 |
info->len = len; if (info->len < sizeof(*(info->hdr))) |
40dd2560e module: refactor ... |
2826 |
return -ENOEXEC; |
c77b8cdf7 module: replace t... |
2827 |
err = security_kernel_load_data(LOADING_MODULE); |
2e72d51b4 security: introdu... |
2828 2829 |
if (err) return err; |
40dd2560e module: refactor ... |
2830 |
/* Suck in entire file: we'll want most of it. */ |
cc9e605dc module: do not pr... |
2831 |
info->hdr = __vmalloc(info->len, |
19809c2da mm, vmalloc: use ... |
2832 |
GFP_KERNEL | __GFP_NOWARN, PAGE_KERNEL); |
34e1169d9 module: add sysca... |
2833 |
if (!info->hdr) |
40dd2560e module: refactor ... |
2834 |
return -ENOMEM; |
3afe9f849 Copy the kernel m... |
2835 |
if (copy_chunked_from_user(info->hdr, umod, info->len) != 0) { |
34e1169d9 module: add sysca... |
2836 2837 |
vfree(info->hdr); return -EFAULT; |
40dd2560e module: refactor ... |
2838 |
} |
34e1169d9 module: add sysca... |
2839 2840 |
return 0; } |
d913188c7 module: layout_an... |
2841 2842 |
static void free_copy(struct load_info *info) { |
d913188c7 module: layout_an... |
2843 2844 |
vfree(info->hdr); } |
2f3238aeb module: add flags... |
2845 |
static int rewrite_section_headers(struct load_info *info, int flags) |
8b5f61a79 module: refactor ... |
2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 |
{ 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: ... |
2856 2857 |
pr_err("Module len %lu truncated ", info->len); |
8b5f61a79 module: refactor ... |
2858 2859 2860 2861 2862 2863 2864 2865 2866 |
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 */ |
38b37d631 module: allow arc... |
2867 |
if (module_exit_section(info->secstrings+shdr->sh_name)) |
8b5f61a79 module: refactor ... |
2868 2869 |
shdr->sh_flags &= ~(unsigned long)SHF_ALLOC; #endif |
8b5f61a79 module: refactor ... |
2870 |
} |
d6df72a06 module: refactor ... |
2871 2872 |
/* Track but don't keep modinfo and version sections. */ |
3e2e857f9 module: Add modul... |
2873 |
info->sechdrs[info->index.vers].sh_flags &= ~(unsigned long)SHF_ALLOC; |
d6df72a06 module: refactor ... |
2874 |
info->sechdrs[info->index.info].sh_flags &= ~(unsigned long)SHF_ALLOC; |
3e2e857f9 module: Add modul... |
2875 |
|
8b5f61a79 module: refactor ... |
2876 2877 |
return 0; } |
3264d3f9d module: add load_... |
2878 2879 2880 2881 2882 |
/* * Set up our basic convenience variables (pointers to section headers, * search for module section index etc), and do some basic section * verification. * |
81a0abd9f module: make it c... |
2883 2884 |
* Set info->mod to the temporary copy of the module in info->hdr. The final one * will be allocated in move_module(). |
3264d3f9d module: add load_... |
2885 |
*/ |
81a0abd9f module: make it c... |
2886 |
static int setup_load_info(struct load_info *info, int flags) |
3264d3f9d module: add load_... |
2887 2888 |
{ unsigned int i; |
3264d3f9d module: add load_... |
2889 2890 2891 |
/* Set up the convenience variables */ info->sechdrs = (void *)info->hdr + info->hdr->e_shoff; |
8b5f61a79 module: refactor ... |
2892 2893 |
info->secstrings = (void *)info->hdr + info->sechdrs[info->hdr->e_shstrndx].sh_offset; |
3264d3f9d module: add load_... |
2894 |
|
5fdc7db64 module: setup loa... |
2895 2896 |
/* Try to find a name early so we can log errors with a module name */ info->index.info = find_sec(info, ".modinfo"); |
496d6c021 module: avoid set... |
2897 |
if (info->index.info) |
5fdc7db64 module: setup loa... |
2898 |
info->name = get_modinfo(info, "name"); |
3264d3f9d module: add load_... |
2899 |
|
8b5f61a79 module: refactor ... |
2900 2901 |
/* Find internal symbols and strings. */ for (i = 1; i < info->hdr->e_shnum; i++) { |
3264d3f9d module: add load_... |
2902 2903 2904 |
if (info->sechdrs[i].sh_type == SHT_SYMTAB) { info->index.sym = i; info->index.str = info->sechdrs[i].sh_link; |
8b5f61a79 module: refactor ... |
2905 2906 2907 |
info->strtab = (char *)info->hdr + info->sechdrs[info->index.str].sh_offset; break; |
3264d3f9d module: add load_... |
2908 |
} |
3264d3f9d module: add load_... |
2909 |
} |
5fdc7db64 module: setup loa... |
2910 |
if (info->index.sym == 0) { |
496d6c021 module: avoid set... |
2911 2912 2913 |
pr_warn("%s: module has no symbols (stripped?) ", info->name ?: "(missing .modinfo section or name field)"); |
5fdc7db64 module: setup loa... |
2914 2915 |
return -ENOEXEC; } |
49668688d module: pass load... |
2916 |
info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); |
3264d3f9d module: add load_... |
2917 |
if (!info->index.mod) { |
3e2e857f9 module: Add modul... |
2918 2919 |
pr_warn("%s: No module found in object ", |
496d6c021 module: avoid set... |
2920 |
info->name ?: "(missing .modinfo section or name field)"); |
81a0abd9f module: make it c... |
2921 |
return -ENOEXEC; |
3264d3f9d module: add load_... |
2922 2923 |
} /* This is temporary: point mod into copy of data. */ |
5fdc7db64 module: setup loa... |
2924 |
info->mod = (void *)info->hdr + info->sechdrs[info->index.mod].sh_offset; |
3264d3f9d module: add load_... |
2925 |
|
3e2e857f9 module: Add modul... |
2926 |
/* |
5fdc7db64 module: setup loa... |
2927 |
* If we didn't load the .modinfo 'name' field earlier, fall back to |
3e2e857f9 module: Add modul... |
2928 2929 2930 |
* on-disk struct mod 'name' field. */ if (!info->name) |
81a0abd9f module: make it c... |
2931 |
info->name = info->mod->name; |
3e2e857f9 module: Add modul... |
2932 |
|
5fdc7db64 module: setup loa... |
2933 2934 2935 2936 |
if (flags & MODULE_INIT_IGNORE_MODVERSIONS) info->index.vers = 0; /* Pretend no __versions section! */ else info->index.vers = find_sec(info, "__versions"); |
3264d3f9d module: add load_... |
2937 |
|
49668688d module: pass load... |
2938 |
info->index.pcpu = find_pcpusec(info); |
3264d3f9d module: add load_... |
2939 |
|
81a0abd9f module: make it c... |
2940 |
return 0; |
3264d3f9d module: add load_... |
2941 |
} |
2f3238aeb module: add flags... |
2942 |
static int check_modinfo(struct module *mod, struct load_info *info, int flags) |
40dd2560e module: refactor ... |
2943 |
{ |
49668688d module: pass load... |
2944 |
const char *modmagic = get_modinfo(info, "vermagic"); |
40dd2560e module: refactor ... |
2945 |
int err; |
2f3238aeb module: add flags... |
2946 2947 |
if (flags & MODULE_INIT_IGNORE_VERMAGIC) modmagic = NULL; |
40dd2560e module: refactor ... |
2948 2949 2950 2951 2952 |
/* 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... |
2953 |
} else if (!same_magic(modmagic, vermagic, info->index.vers)) { |
bddb12b32 kernel/module.c: ... |
2954 2955 |
pr_err("%s: version magic '%s' should be '%s' ", |
3e2e857f9 module: Add modul... |
2956 |
info->name, modmagic, vermagic); |
40dd2560e module: refactor ... |
2957 2958 |
return -ENOEXEC; } |
3205c36cf module: Issue war... |
2959 2960 2961 2962 2963 |
if (!get_modinfo(info, "intree")) { if (!test_taint(TAINT_OOT_MODULE)) pr_warn("%s: loading out-of-tree module taints kernel. ", mod->name); |
373d4d099 taint: add explic... |
2964 |
add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK); |
3205c36cf module: Issue war... |
2965 |
} |
2449b8ba0 module,bug: Add T... |
2966 |
|
caf7501a1 module/retpoline:... |
2967 |
check_modinfo_retpoline(mod, info); |
49668688d module: pass load... |
2968 |
if (get_modinfo(info, "staging")) { |
373d4d099 taint: add explic... |
2969 |
add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK); |
bddb12b32 kernel/module.c: ... |
2970 2971 2972 |
pr_warn("%s: module is from the staging directory, the quality " "is unknown, you have been warned. ", mod->name); |
40dd2560e module: refactor ... |
2973 |
} |
22e268ebe module: refactor ... |
2974 |
|
2992ef29a livepatch/module:... |
2975 |
err = check_modinfo_livepatch(mod, info); |
1ce15ef4f module: preserve ... |
2976 2977 |
if (err) return err; |
22e268ebe module: refactor ... |
2978 |
/* Set up license info based on the info section */ |
49668688d module: pass load... |
2979 |
set_license(mod, get_modinfo(info, "license")); |
22e268ebe module: refactor ... |
2980 |
|
40dd2560e module: refactor ... |
2981 2982 |
return 0; } |
eb3057df7 kernel: add suppo... |
2983 |
static int find_module_sections(struct module *mod, struct load_info *info) |
f91a13bb9 module: refactor ... |
2984 |
{ |
49668688d module: pass load... |
2985 |
mod->kp = section_objs(info, "__param", |
f91a13bb9 module: refactor ... |
2986 |
sizeof(*mod->kp), &mod->num_kp); |
49668688d module: pass load... |
2987 |
mod->syms = section_objs(info, "__ksymtab", |
f91a13bb9 module: refactor ... |
2988 |
sizeof(*mod->syms), &mod->num_syms); |
49668688d module: pass load... |
2989 2990 |
mod->crcs = section_addr(info, "__kcrctab"); mod->gpl_syms = section_objs(info, "__ksymtab_gpl", |
f91a13bb9 module: refactor ... |
2991 2992 |
sizeof(*mod->gpl_syms), &mod->num_gpl_syms); |
49668688d module: pass load... |
2993 2994 |
mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(info, |
f91a13bb9 module: refactor ... |
2995 2996 2997 |
"__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); |
49668688d module: pass load... |
2998 |
mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); |
f91a13bb9 module: refactor ... |
2999 3000 |
#ifdef CONFIG_UNUSED_SYMBOLS |
49668688d module: pass load... |
3001 |
mod->unused_syms = section_objs(info, "__ksymtab_unused", |
f91a13bb9 module: refactor ... |
3002 3003 |
sizeof(*mod->unused_syms), &mod->num_unused_syms); |
49668688d module: pass load... |
3004 3005 |
mod->unused_crcs = section_addr(info, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", |
f91a13bb9 module: refactor ... |
3006 3007 |
sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); |
49668688d module: pass load... |
3008 |
mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); |
f91a13bb9 module: refactor ... |
3009 3010 |
#endif #ifdef CONFIG_CONSTRUCTORS |
49668688d module: pass load... |
3011 |
mod->ctors = section_objs(info, ".ctors", |
f91a13bb9 module: refactor ... |
3012 |
sizeof(*mod->ctors), &mod->num_ctors); |
eb3057df7 kernel: add suppo... |
3013 3014 3015 3016 3017 3018 3019 3020 |
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. */ |
6da0b5651 kernel:module Fix... |
3021 3022 |
pr_warn("%s: has both .ctors and .init_array. ", |
eb3057df7 kernel: add suppo... |
3023 3024 3025 |
mod->name); return -EINVAL; } |
f91a13bb9 module: refactor ... |
3026 3027 3028 |
#endif #ifdef CONFIG_TRACEPOINTS |
654986462 tracepoints: Fix ... |
3029 3030 3031 |
mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); |
f91a13bb9 module: refactor ... |
3032 |
#endif |
fe15b50cd srcu: Allocate pe... |
3033 3034 3035 3036 3037 |
#ifdef CONFIG_TREE_SRCU mod->srcu_struct_ptrs = section_objs(info, "___srcu_struct_ptrs", sizeof(*mod->srcu_struct_ptrs), &mod->num_srcu_structs); #endif |
a38d1107f bpf: support raw ... |
3038 3039 3040 3041 3042 |
#ifdef CONFIG_BPF_EVENTS mod->bpf_raw_events = section_objs(info, "__bpf_raw_tp_map", sizeof(*mod->bpf_raw_events), &mod->num_bpf_raw_events); #endif |
e9666d10a jump_label: move ... |
3043 |
#ifdef CONFIG_JUMP_LABEL |
bf5438fca jump label: Base ... |
3044 3045 3046 3047 |
mod->jump_entries = section_objs(info, "__jump_table", sizeof(*mod->jump_entries), &mod->num_jump_entries); #endif |
f91a13bb9 module: refactor ... |
3048 |
#ifdef CONFIG_EVENT_TRACING |
49668688d module: pass load... |
3049 |
mod->trace_events = section_objs(info, "_ftrace_events", |
f91a13bb9 module: refactor ... |
3050 3051 |
sizeof(*mod->trace_events), &mod->num_trace_events); |
99be647c5 trace: rename str... |
3052 3053 3054 |
mod->trace_evals = section_objs(info, "_ftrace_eval_map", sizeof(*mod->trace_evals), &mod->num_trace_evals); |
f91a13bb9 module: refactor ... |
3055 |
#endif |
13b9b6e74 tracing: Fix modu... |
3056 3057 3058 3059 |
#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... |
3060 |
#endif |
f91a13bb9 module: refactor ... |
3061 3062 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |
49668688d module: pass load... |
3063 |
mod->ftrace_callsites = section_objs(info, "__mcount_loc", |
f91a13bb9 module: refactor ... |
3064 3065 3066 |
sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
540adea38 error-injection: ... |
3067 3068 3069 3070 |
#ifdef CONFIG_FUNCTION_ERROR_INJECTION mod->ei_funcs = section_objs(info, "_error_injection_whitelist", sizeof(*mod->ei_funcs), &mod->num_ei_funcs); |
92ace9991 add infrastructur... |
3071 |
#endif |
811d66a0e module: group pos... |
3072 3073 |
mod->extable = section_objs(info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); |
49668688d module: pass load... |
3074 |
if (section_addr(info, "__obsparm")) |
bddb12b32 kernel/module.c: ... |
3075 3076 |
pr_warn("%s: Ignoring obsolete parameters ", mod->name); |
811d66a0e module: group pos... |
3077 3078 3079 |
info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); |
eb3057df7 kernel: add suppo... |
3080 3081 |
return 0; |
f91a13bb9 module: refactor ... |
3082 |
} |
49668688d module: pass load... |
3083 |
static int move_module(struct module *mod, struct load_info *info) |
65b8a9b4d module: refactor ... |
3084 3085 3086 3087 3088 |
{ int i; void *ptr; /* Do the allocs. */ |
7523e4dc5 module: use a str... |
3089 |
ptr = module_alloc(mod->core_layout.size); |
65b8a9b4d module: refactor ... |
3090 3091 3092 3093 3094 3095 3096 |
/* * 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... |
3097 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
3098 |
|
7523e4dc5 module: use a str... |
3099 3100 |
memset(ptr, 0, mod->core_layout.size); mod->core_layout.base = ptr; |
65b8a9b4d module: refactor ... |
3101 |
|
7523e4dc5 module: use a str... |
3102 3103 |
if (mod->init_layout.size) { ptr = module_alloc(mod->init_layout.size); |
82fab442f modules: don't ha... |
3104 3105 3106 3107 3108 3109 3110 3111 |
/* * 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) { |
7523e4dc5 module: use a str... |
3112 |
module_memfree(mod->core_layout.base); |
82fab442f modules: don't ha... |
3113 3114 |
return -ENOMEM; } |
7523e4dc5 module: use a str... |
3115 3116 |
memset(ptr, 0, mod->init_layout.size); mod->init_layout.base = ptr; |
82fab442f modules: don't ha... |
3117 |
} else |
7523e4dc5 module: use a str... |
3118 |
mod->init_layout.base = NULL; |
65b8a9b4d module: refactor ... |
3119 3120 |
/* Transfer each section which specifies SHF_ALLOC */ |
5e1241692 module: replace D... |
3121 3122 |
pr_debug("final section addresses: "); |
49668688d module: pass load... |
3123 |
for (i = 0; i < info->hdr->e_shnum; i++) { |
65b8a9b4d module: refactor ... |
3124 |
void *dest; |
49668688d module: pass load... |
3125 |
Elf_Shdr *shdr = &info->sechdrs[i]; |
65b8a9b4d module: refactor ... |
3126 |
|
49668688d module: pass load... |
3127 |
if (!(shdr->sh_flags & SHF_ALLOC)) |
65b8a9b4d module: refactor ... |
3128 |
continue; |
49668688d module: pass load... |
3129 |
if (shdr->sh_entsize & INIT_OFFSET_MASK) |
7523e4dc5 module: use a str... |
3130 |
dest = mod->init_layout.base |
49668688d module: pass load... |
3131 |
+ (shdr->sh_entsize & ~INIT_OFFSET_MASK); |
65b8a9b4d module: refactor ... |
3132 |
else |
7523e4dc5 module: use a str... |
3133 |
dest = mod->core_layout.base + shdr->sh_entsize; |
65b8a9b4d module: refactor ... |
3134 |
|
49668688d module: pass load... |
3135 3136 |
if (shdr->sh_type != SHT_NOBITS) memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); |
65b8a9b4d module: refactor ... |
3137 |
/* Update sh_addr to point to copy in image. */ |
49668688d module: pass load... |
3138 |
shdr->sh_addr = (unsigned long)dest; |
5e1241692 module: replace D... |
3139 3140 3141 |
pr_debug("\t0x%lx %s ", (long)shdr->sh_addr, info->secstrings + shdr->sh_name); |
65b8a9b4d module: refactor ... |
3142 |
} |
d913188c7 module: layout_an... |
3143 3144 |
return 0; |
65b8a9b4d module: refactor ... |
3145 |
} |
49668688d module: pass load... |
3146 |
static int check_module_license_and_versions(struct module *mod) |
22e268ebe module: refactor ... |
3147 |
{ |
3205c36cf module: Issue war... |
3148 |
int prev_taint = test_taint(TAINT_PROPRIETARY_MODULE); |
22e268ebe module: refactor ... |
3149 3150 3151 3152 3153 3154 |
/* * 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... |
3155 |
add_taint(TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
3156 3157 3158 |
/* driverloader was caught wrongly pretending to be under GPL */ if (strcmp(mod->name, "driverloader") == 0) |
373d4d099 taint: add explic... |
3159 3160 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
3161 |
|
c99af3752 module: taint ker... |
3162 3163 |
/* lve claims to be GPL but upstream won't provide source */ if (strcmp(mod->name, "lve") == 0) |
373d4d099 taint: add explic... |
3164 3165 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
c99af3752 module: taint ker... |
3166 |
|
3205c36cf module: Issue war... |
3167 3168 3169 |
if (!prev_taint && test_taint(TAINT_PROPRIETARY_MODULE)) pr_warn("%s: module license taints kernel. ", mod->name); |
22e268ebe module: refactor ... |
3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 |
#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. */ |
7523e4dc5 module: use a str... |
3199 3200 3201 3202 3203 3204 |
if (mod->init_layout.base) flush_icache_range((unsigned long)mod->init_layout.base, (unsigned long)mod->init_layout.base + mod->init_layout.size); flush_icache_range((unsigned long)mod->core_layout.base, (unsigned long)mod->core_layout.base + mod->core_layout.size); |
22e268ebe module: refactor ... |
3205 3206 3207 |
set_fs(old_fs); } |
74e08fcf7 modules: add defa... |
3208 3209 3210 3211 3212 3213 3214 |
int __weak module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } |
be7de5f91 modules: Add kern... |
3215 3216 |
/* module_blacklist is a comma-separated list of module names */ static char *module_blacklist; |
96b5b1945 module: make the ... |
3217 |
static bool blacklisted(const char *module_name) |
be7de5f91 modules: Add kern... |
3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 |
{ const char *p; size_t len; if (!module_blacklist) return false; for (p = module_blacklist; *p; p += len) { len = strcspn(p, ","); if (strlen(module_name) == len && !memcmp(module_name, p, len)) return true; if (p[len] == ',') len++; } return false; } core_param(module_blacklist, module_blacklist, charp, 0400); |
2f3238aeb module: add flags... |
3235 |
static struct module *layout_and_allocate(struct load_info *info, int flags) |
1da177e4c Linux-2.6.12-rc2 |
3236 |
{ |
1da177e4c Linux-2.6.12-rc2 |
3237 |
struct module *mod; |
444d13ff1 modules: add ro_a... |
3238 |
unsigned int ndx; |
d913188c7 module: layout_an... |
3239 |
int err; |
3ae91c21d module: fix up CO... |
3240 |
|
81a0abd9f module: make it c... |
3241 |
err = check_modinfo(info->mod, info, flags); |
40dd2560e module: refactor ... |
3242 3243 |
if (err) return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
3244 |
|
1da177e4c Linux-2.6.12-rc2 |
3245 |
/* Allow arches to frob section contents and sizes. */ |
49668688d module: pass load... |
3246 |
err = module_frob_arch_sections(info->hdr, info->sechdrs, |
81a0abd9f module: make it c... |
3247 |
info->secstrings, info->mod); |
1da177e4c Linux-2.6.12-rc2 |
3248 |
if (err < 0) |
8d8022e8a module: do percpu... |
3249 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
3250 |
|
8d8022e8a module: do percpu... |
3251 3252 |
/* 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 |
3253 |
|
444d13ff1 modules: add ro_a... |
3254 3255 3256 3257 3258 3259 3260 3261 |
/* * Mark ro_after_init section with SHF_RO_AFTER_INIT so that * layout_sections() can put it in the right place. * Note: ro_after_init sections also have SHF_{WRITE,ALLOC} set. */ ndx = find_sec(info, ".data..ro_after_init"); if (ndx) info->sechdrs[ndx].sh_flags |= SHF_RO_AFTER_INIT; |
e872267b8 jump_table: Move ... |
3262 3263 3264 3265 3266 3267 3268 3269 3270 |
/* * Mark the __jump_table section as ro_after_init as well: these data * structures are never modified, with the exception of entries that * refer to code in the __init section, which are annotated as such * at module load time. */ ndx = find_sec(info, "__jump_table"); if (ndx) info->sechdrs[ndx].sh_flags |= SHF_RO_AFTER_INIT; |
444d13ff1 modules: add ro_a... |
3271 |
|
1da177e4c Linux-2.6.12-rc2 |
3272 3273 3274 |
/* 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. */ |
81a0abd9f module: make it c... |
3275 3276 |
layout_sections(info->mod, info); layout_symtab(info->mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3277 |
|
65b8a9b4d module: refactor ... |
3278 |
/* Allocate and move to the final place */ |
81a0abd9f module: make it c... |
3279 |
err = move_module(info->mod, info); |
d913188c7 module: layout_an... |
3280 |
if (err) |
8d8022e8a module: do percpu... |
3281 |
return ERR_PTR(err); |
d913188c7 module: layout_an... |
3282 3283 3284 |
/* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; |
49668688d module: pass load... |
3285 |
kmemleak_load_module(mod, info); |
d913188c7 module: layout_an... |
3286 |
return mod; |
d913188c7 module: layout_an... |
3287 3288 3289 3290 3291 |
} /* mod is no longer valid after this! */ static void module_deallocate(struct module *mod, struct load_info *info) { |
d913188c7 module: layout_an... |
3292 |
percpu_modfree(mod); |
d453cded0 module_arch_freei... |
3293 |
module_arch_freeing_init(mod); |
7523e4dc5 module: use a str... |
3294 3295 |
module_memfree(mod->init_layout.base); module_memfree(mod->core_layout.base); |
d913188c7 module: layout_an... |
3296 |
} |
74e08fcf7 modules: add defa... |
3297 3298 3299 3300 3301 3302 |
int __weak module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } |
811d66a0e module: group pos... |
3303 3304 |
static int post_relocation(struct module *mod, const struct load_info *info) { |
51f3d0f47 module: cleanup c... |
3305 |
/* Sort exception table now relocations are done. */ |
811d66a0e module: group pos... |
3306 3307 3308 3309 3310 |
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... |
3311 |
/* Setup kallsyms-specific fields. */ |
811d66a0e module: group pos... |
3312 3313 3314 3315 3316 |
add_kallsyms(mod, info); /* Arch-specific module finalizing. */ return module_finalize(info->hdr, info->sechdrs, mod); } |
9bb9c3be5 module: wait when... |
3317 3318 3319 3320 3321 |
/* Is this module of this name done loading? No locks held. */ static bool finished_loading(const char *name) { struct module *mod; bool ret; |
9cc019b8c module: Replace o... |
3322 3323 3324 3325 3326 3327 |
/* * The module_mutex should not be a heavily contended lock; * if we get the occasional sleep here, we'll go an extra iteration * in the wait_event_interruptible(), which is harmless. */ sched_annotate_sleep(); |
9bb9c3be5 module: wait when... |
3328 |
mutex_lock(&module_mutex); |
4f6de4d51 module: don't mod... |
3329 |
mod = find_module_all(name, strlen(name), true); |
6e6de3dee kernel/module.c: ... |
3330 |
ret = !mod || mod->state == MODULE_STATE_LIVE; |
9bb9c3be5 module: wait when... |
3331 3332 3333 3334 |
mutex_unlock(&module_mutex); return ret; } |
34e1169d9 module: add sysca... |
3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 |
/* 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 } |
c74963790 module: fix race ... |
3345 3346 |
/* For freeing module_init on success, in case kallsyms traversing */ struct mod_initfree { |
1a7b7d922 modules: Use vmal... |
3347 |
struct llist_node node; |
c74963790 module: fix race ... |
3348 3349 |
void *module_init; }; |
1a7b7d922 modules: Use vmal... |
3350 |
static void do_free_init(struct work_struct *w) |
c74963790 module: fix race ... |
3351 |
{ |
1a7b7d922 modules: Use vmal... |
3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 |
struct llist_node *pos, *n, *list; struct mod_initfree *initfree; list = llist_del_all(&init_free_list); synchronize_rcu(); llist_for_each_safe(pos, n, list) { initfree = container_of(pos, struct mod_initfree, node); module_memfree(initfree->module_init); kfree(initfree); } |
c74963790 module: fix race ... |
3364 |
} |
1a7b7d922 modules: Use vmal... |
3365 3366 3367 3368 3369 3370 3371 |
static int __init modules_wq_init(void) { INIT_WORK(&init_free_wq, do_free_init); init_llist_head(&init_free_list); return 0; } module_init(modules_wq_init); |
be02a1862 kernel/module.c: ... |
3372 3373 3374 3375 3376 3377 3378 |
/* * This is where the real work happens. * * Keep it uninlined to provide a reliable breakpoint target, e.g. for the gdb * helper command 'lx-symbols'. */ static noinline int do_init_module(struct module *mod) |
34e1169d9 module: add sysca... |
3379 3380 |
{ int ret = 0; |
c74963790 module: fix race ... |
3381 3382 3383 3384 3385 3386 3387 |
struct mod_initfree *freeinit; freeinit = kmalloc(sizeof(*freeinit), GFP_KERNEL); if (!freeinit) { ret = -ENOMEM; goto fail; } |
7523e4dc5 module: use a str... |
3388 |
freeinit->module_init = mod->init_layout.base; |
34e1169d9 module: add sysca... |
3389 |
|
774a1221e module, async: as... |
3390 3391 3392 3393 3394 |
/* * 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... |
3395 3396 3397 3398 3399 |
do_mod_ctors(mod); /* Start the module */ if (mod->init != NULL) ret = do_one_initcall(mod->init); if (ret < 0) { |
c74963790 module: fix race ... |
3400 |
goto fail_free_freeinit; |
34e1169d9 module: add sysca... |
3401 3402 |
} if (ret > 0) { |
bddb12b32 kernel/module.c: ... |
3403 3404 3405 3406 3407 3408 |
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... |
3409 3410 3411 3412 3413 3414 3415 |
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... |
3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 |
/* * 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 */ |
f2411da74 driver-core: add ... |
3433 |
if (!mod->async_probe_requested && (current->flags & PF_USED_ASYNC)) |
774a1221e module, async: as... |
3434 |
async_synchronize_full(); |
34e1169d9 module: add sysca... |
3435 |
|
aba4b5c22 ftrace: Save modu... |
3436 |
ftrace_free_mem(mod, mod->init_layout.base, mod->init_layout.base + |
3e234289f ftrace: Allow mod... |
3437 |
mod->init_layout.size); |
34e1169d9 module: add sysca... |
3438 3439 3440 3441 3442 |
mutex_lock(&module_mutex); /* Drop initial reference. */ module_put(mod); trim_init_extable(mod); #ifdef CONFIG_KALLSYMS |
8244062ef modules: fix long... |
3443 3444 |
/* Switch to core kallsyms now init is done: kallsyms may be walking! */ rcu_assign_pointer(mod->kallsyms, &mod->core_kallsyms); |
34e1169d9 module: add sysca... |
3445 |
#endif |
444d13ff1 modules: add ro_a... |
3446 |
module_enable_ro(mod, true); |
93c2e105f module: Optimize ... |
3447 |
mod_tree_remove_init(mod); |
d453cded0 module_arch_freei... |
3448 |
module_arch_freeing_init(mod); |
7523e4dc5 module: use a str... |
3449 3450 3451 |
mod->init_layout.base = NULL; mod->init_layout.size = 0; mod->init_layout.ro_size = 0; |
444d13ff1 modules: add ro_a... |
3452 |
mod->init_layout.ro_after_init_size = 0; |
7523e4dc5 module: use a str... |
3453 |
mod->init_layout.text_size = 0; |
c74963790 module: fix race ... |
3454 3455 |
/* * We want to free module_init, but be aware that kallsyms may be |
0be964be0 module: Sanitize ... |
3456 |
* walking this with preempt disabled. In all the failure paths, we |
cb2f55369 modules: Replace ... |
3457 |
* call synchronize_rcu(), but we don't want to slow down the success |
1a7b7d922 modules: Use vmal... |
3458 3459 3460 |
* path. module_memfree() cannot be called in an interrupt, so do the * work and call synchronize_rcu() in a work queue. * |
ae646f0b9 init: fix false p... |
3461 3462 3463 3464 |
* Note that module_alloc() on most architectures creates W+X page * mappings which won't be cleaned up until do_free_init() runs. Any * code such as mark_rodata_ro() which depends on those mappings to * be cleaned up needs to sync with the queued work - ie |
cb2f55369 modules: Replace ... |
3465 |
* rcu_barrier() |
c74963790 module: fix race ... |
3466 |
*/ |
1a7b7d922 modules: Use vmal... |
3467 3468 |
if (llist_add(&freeinit->node, &init_free_list)) schedule_work(&init_free_wq); |
34e1169d9 module: add sysca... |
3469 3470 3471 3472 |
mutex_unlock(&module_mutex); wake_up_all(&module_wq); return 0; |
c74963790 module: fix race ... |
3473 3474 3475 3476 3477 3478 |
fail_free_freeinit: kfree(freeinit); fail: /* Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; |
cb2f55369 modules: Replace ... |
3479 |
synchronize_rcu(); |
c74963790 module: fix race ... |
3480 3481 3482 |
module_put(mod); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
7e545d6ec livepatch/module:... |
3483 |
klp_module_going(mod); |
7dcd182be ftrace/module: re... |
3484 |
ftrace_release_mod(mod); |
c74963790 module: fix race ... |
3485 3486 3487 |
free_module(mod); wake_up_all(&module_wq); return ret; |
34e1169d9 module: add sysca... |
3488 3489 3490 3491 3492 3493 3494 3495 3496 |
} static int may_init_module(void) { if (!capable(CAP_SYS_MODULE) || modules_disabled) return -EPERM; return 0; } |
a3535c7e4 module: clean up ... |
3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 |
/* * 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... |
3511 3512 |
old = find_module_all(mod->name, strlen(mod->name), true); if (old != NULL) { |
6e6de3dee kernel/module.c: ... |
3513 |
if (old->state != MODULE_STATE_LIVE) { |
a3535c7e4 module: clean up ... |
3514 3515 |
/* Wait in case it fails to load. */ mutex_unlock(&module_mutex); |
9cc019b8c module: Replace o... |
3516 3517 |
err = wait_event_interruptible(module_wq, finished_loading(mod->name)); |
a3535c7e4 module: clean up ... |
3518 3519 3520 3521 3522 3523 3524 |
if (err) goto out_unlocked; goto again; } err = -EEXIST; goto out; } |
4f666546d module: Rework mo... |
3525 |
mod_update_bounds(mod); |
a3535c7e4 module: clean up ... |
3526 |
list_add_rcu(&mod->list, &modules); |
93c2e105f module: Optimize ... |
3527 |
mod_tree_insert(mod); |
a3535c7e4 module: clean up ... |
3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 |
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). */ |
2d25bc552 module: make it c... |
3543 |
err = verify_exported_symbols(mod); |
a3535c7e4 module: clean up ... |
3544 3545 3546 3547 3548 |
if (err < 0) goto out; /* This relies on module_mutex for list integrity. */ module_bug_finalize(info->hdr, info->sechdrs, mod); |
444d13ff1 modules: add ro_a... |
3549 |
module_enable_ro(mod, false); |
85c898db6 module: clean up ... |
3550 |
module_enable_nx(mod); |
2eef1399a modules: fix BUG ... |
3551 |
module_enable_x(mod); |
4982223e5 module: set nx be... |
3552 |
|
a3535c7e4 module: clean up ... |
3553 3554 3555 |
/* Mark state as coming so strong_try_module_get() ignores us, * but kallsyms etc. can see us. */ mod->state = MODULE_STATE_COMING; |
4982223e5 module: set nx be... |
3556 |
mutex_unlock(&module_mutex); |
4982223e5 module: set nx be... |
3557 |
return 0; |
a3535c7e4 module: clean up ... |
3558 3559 3560 3561 3562 |
out: mutex_unlock(&module_mutex); return err; } |
4c973d162 modules: split pa... |
3563 3564 |
static int prepare_coming_module(struct module *mod) { |
7e545d6ec livepatch/module:... |
3565 |
int err; |
4c973d162 modules: split pa... |
3566 |
ftrace_module_enable(mod); |
7e545d6ec livepatch/module:... |
3567 3568 3569 |
err = klp_module_coming(mod); if (err) return err; |
4c973d162 modules: split pa... |
3570 3571 3572 3573 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); return 0; } |
ecc861705 module: add extra... |
3574 3575 |
static int unknown_module_param_cb(char *param, char *val, const char *modname, void *arg) |
54041d8a7 modules: don't fa... |
3576 |
{ |
f2411da74 driver-core: add ... |
3577 3578 3579 3580 3581 3582 3583 |
struct module *mod = arg; int ret; if (strcmp(param, "async_probe") == 0) { mod->async_probe_requested = true; return 0; } |
6da0b5651 kernel:module Fix... |
3584 |
/* Check for magic 'dyndbg' arg */ |
f2411da74 driver-core: add ... |
3585 |
ret = ddebug_dyndbg_module_param_cb(param, val, modname); |
bddb12b32 kernel/module.c: ... |
3586 3587 3588 |
if (ret != 0) pr_warn("%s: unknown parameter '%s' ignored ", modname, param); |
54041d8a7 modules: don't fa... |
3589 3590 |
return 0; } |
d913188c7 module: layout_an... |
3591 3592 |
/* 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... |
3593 3594 |
static int load_module(struct load_info *info, const char __user *uargs, int flags) |
d913188c7 module: layout_an... |
3595 |
{ |
a3535c7e4 module: clean up ... |
3596 |
struct module *mod; |
5fdc7db64 module: setup loa... |
3597 |
long err = 0; |
51e158c12 param: hand argum... |
3598 |
char *after_dashes; |
d913188c7 module: layout_an... |
3599 |
|
5fdc7db64 module: setup loa... |
3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 |
err = elf_header_check(info); if (err) goto free_copy; err = setup_load_info(info, flags); if (err) goto free_copy; if (blacklisted(info->name)) { err = -EPERM; goto free_copy; } |
bca014caa module: Invalidat... |
3612 |
err = module_sig_check(info, flags); |
34e1169d9 module: add sysca... |
3613 3614 |
if (err) goto free_copy; |
d913188c7 module: layout_an... |
3615 |
|
5fdc7db64 module: setup loa... |
3616 |
err = rewrite_section_headers(info, flags); |
d913188c7 module: layout_an... |
3617 |
if (err) |
34e1169d9 module: add sysca... |
3618 |
goto free_copy; |
d913188c7 module: layout_an... |
3619 |
|
5fdc7db64 module: setup loa... |
3620 3621 3622 3623 3624 |
/* Check module struct version now, before we try to use module. */ if (!check_modstruct_version(info, info->mod)) { err = -ENOEXEC; goto free_copy; } |
d913188c7 module: layout_an... |
3625 |
/* Figure out module layout, and allocate all the memory. */ |
2f3238aeb module: add flags... |
3626 |
mod = layout_and_allocate(info, flags); |
65b8a9b4d module: refactor ... |
3627 3628 |
if (IS_ERR(mod)) { err = PTR_ERR(mod); |
d913188c7 module: layout_an... |
3629 |
goto free_copy; |
1da177e4c Linux-2.6.12-rc2 |
3630 |
} |
1da177e4c Linux-2.6.12-rc2 |
3631 |
|
ca86cad73 audit: log module... |
3632 |
audit_log_kern_module(mod->name); |
a3535c7e4 module: clean up ... |
3633 3634 3635 |
/* Reserve our place in the list. */ err = add_unformed_module(mod); if (err) |
1fb9341ac module: put modul... |
3636 |
goto free_module; |
1fb9341ac module: put modul... |
3637 |
|
106a4ee25 module: signature... |
3638 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
3639 |
mod->sig_ok = info->sig_ok; |
64748a2c9 module: printk me... |
3640 |
if (!mod->sig_ok) { |
bddb12b32 kernel/module.c: ... |
3641 |
pr_notice_once("%s: module verification failed: signature " |
ab92ebbb8 module: Remove do... |
3642 |
"and/or required key missing - tainting " |
bddb12b32 kernel/module.c: ... |
3643 3644 |
"kernel ", mod->name); |
66cc69e34 Fix: module signa... |
3645 |
add_taint_module(mod, TAINT_UNSIGNED_MODULE, LOCKDEP_STILL_OK); |
64748a2c9 module: printk me... |
3646 |
} |
106a4ee25 module: signature... |
3647 |
#endif |
8d8022e8a module: do percpu... |
3648 |
/* To avoid stressing percpu allocator, do this once we're unique. */ |
9eb76d779 module: cleanup c... |
3649 |
err = percpu_modalloc(mod, info); |
8d8022e8a module: do percpu... |
3650 3651 |
if (err) goto unlink_mod; |
49668688d module: pass load... |
3652 |
/* Now module is in final location, initialize linked lists, etc. */ |
9f85a4bbb module: refactor ... |
3653 3654 |
err = module_unload_init(mod); if (err) |
1fb9341ac module: put modul... |
3655 |
goto unlink_mod; |
1da177e4c Linux-2.6.12-rc2 |
3656 |
|
cf2fde7b3 param: fix module... |
3657 |
init_param_lock(mod); |
b51d23e4e module: add per-m... |
3658 |
|
22e268ebe module: refactor ... |
3659 3660 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
eb3057df7 kernel: add suppo... |
3661 3662 3663 |
err = find_module_sections(mod, info); if (err) goto free_unload; |
9b37ccfc6 module: allow ndi... |
3664 |
|
49668688d module: pass load... |
3665 |
err = check_module_license_and_versions(mod); |
22e268ebe module: refactor ... |
3666 3667 |
if (err) goto free_unload; |
9841d61d7 [PATCH] Add taint... |
3668 |
|
c988d2b28 [PATCH] modules: ... |
3669 |
/* Set up MODINFO_ATTR fields */ |
34e1169d9 module: add sysca... |
3670 |
setup_modinfo(mod, info); |
c988d2b28 [PATCH] modules: ... |
3671 |
|
1da177e4c Linux-2.6.12-rc2 |
3672 |
/* Fix up syms, so that st_value is a pointer to location. */ |
34e1169d9 module: add sysca... |
3673 |
err = simplify_symbols(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3674 |
if (err < 0) |
d913188c7 module: layout_an... |
3675 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3676 |
|
34e1169d9 module: add sysca... |
3677 |
err = apply_relocations(mod, info); |
22e268ebe module: refactor ... |
3678 |
if (err < 0) |
d913188c7 module: layout_an... |
3679 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3680 |
|
34e1169d9 module: add sysca... |
3681 |
err = post_relocation(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3682 |
if (err < 0) |
d913188c7 module: layout_an... |
3683 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3684 |
|
22e268ebe module: refactor ... |
3685 |
flush_module_icache(mod); |
378bac820 [PATCH] flush ica... |
3686 |
|
6526c534b module: move modu... |
3687 3688 3689 3690 3691 3692 |
/* 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... |
3693 |
|
527963127 module: fix ddebu... |
3694 |
dynamic_debug_setup(mod, info->debug, info->num_debug); |
ff49d74ad module: initializ... |
3695 |
|
a949ae560 ftrace/module: Ha... |
3696 3697 |
/* Ftrace init must be called in the MODULE_STATE_UNFORMED state */ ftrace_module_init(mod); |
a3535c7e4 module: clean up ... |
3698 3699 3700 |
/* Finally it's fully formed, ready to start executing. */ err = complete_formation(mod, info); if (err) |
1fb9341ac module: put modul... |
3701 |
goto ddebug_cleanup; |
be593f4ce module: verify_ex... |
3702 |
|
4c973d162 modules: split pa... |
3703 3704 3705 |
err = prepare_coming_module(mod); if (err) goto bug_cleanup; |
51f3d0f47 module: cleanup c... |
3706 |
/* Module is ready to execute: parsing args may do that. */ |
51e158c12 param: hand argum... |
3707 |
after_dashes = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, |
4355efbd8 modules: fix modp... |
3708 |
-32768, 32767, mod, |
ecc861705 module: add extra... |
3709 |
unknown_module_param_cb); |
51e158c12 param: hand argum... |
3710 3711 |
if (IS_ERR(after_dashes)) { err = PTR_ERR(after_dashes); |
4c973d162 modules: split pa... |
3712 |
goto coming_cleanup; |
51e158c12 param: hand argum... |
3713 3714 3715 3716 3717 |
} else if (after_dashes) { pr_warn("%s: parameters '%s' after `--' ignored ", mod->name, after_dashes); } |
1da177e4c Linux-2.6.12-rc2 |
3718 |
|
ca86cad73 audit: log module... |
3719 |
/* Link in to sysfs. */ |
34e1169d9 module: add sysca... |
3720 |
err = mod_sysfs_setup(mod, info, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
3721 |
if (err < 0) |
4c973d162 modules: split pa... |
3722 |
goto coming_cleanup; |
80a3d1bb4 module: move sysf... |
3723 |
|
1ce15ef4f module: preserve ... |
3724 3725 3726 3727 3728 |
if (is_livepatch_module(mod)) { err = copy_module_elf(mod, info); if (err < 0) goto sysfs_cleanup; } |
48fd11880 module: Fix perfo... |
3729 |
/* Get rid of temporary copy. */ |
34e1169d9 module: add sysca... |
3730 |
free_copy(info); |
1da177e4c Linux-2.6.12-rc2 |
3731 3732 |
/* Done! */ |
51f3d0f47 module: cleanup c... |
3733 |
trace_module_load(mod); |
34e1169d9 module: add sysca... |
3734 3735 |
return do_init_module(mod); |
1da177e4c Linux-2.6.12-rc2 |
3736 |
|
1ce15ef4f module: preserve ... |
3737 3738 |
sysfs_cleanup: mod_sysfs_teardown(mod); |
4c973d162 modules: split pa... |
3739 |
coming_cleanup: |
885a78d4a module: Ensure a ... |
3740 |
mod->state = MODULE_STATE_GOING; |
a5544880a module: fix memor... |
3741 |
destroy_params(mod->kp, mod->num_kp); |
4c973d162 modules: split pa... |
3742 3743 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
7e545d6ec livepatch/module:... |
3744 |
klp_module_going(mod); |
1fb9341ac module: put modul... |
3745 3746 |
bug_cleanup: /* module_bug_cleanup needs module_mutex protection */ |
75676500f module: make lock... |
3747 |
mutex_lock(&module_mutex); |
5336377d6 modules: Fix modu... |
3748 |
module_bug_cleanup(mod); |
ee61abb32 module: fix missi... |
3749 |
mutex_unlock(&module_mutex); |
ff7e0055b module: Clean up ... |
3750 |
|
a3535c7e4 module: clean up ... |
3751 |
ddebug_cleanup: |
1323eac7f ftrace/module: Mo... |
3752 |
ftrace_release_mod(mod); |
527963127 module: fix ddebu... |
3753 |
dynamic_debug_remove(mod, info->debug); |
cb2f55369 modules: Replace ... |
3754 |
synchronize_rcu(); |
6526c534b module: move modu... |
3755 3756 |
kfree(mod->args); free_arch_cleanup: |
1da177e4c Linux-2.6.12-rc2 |
3757 |
module_arch_cleanup(mod); |
d913188c7 module: layout_an... |
3758 |
free_modinfo: |
a263f7763 module: fix memor... |
3759 |
free_modinfo(mod); |
22e268ebe module: refactor ... |
3760 |
free_unload: |
1da177e4c Linux-2.6.12-rc2 |
3761 |
module_unload_free(mod); |
1fb9341ac module: put modul... |
3762 3763 3764 3765 |
unlink_mod: mutex_lock(&module_mutex); /* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); |
758556bdc module: Fix load_... |
3766 |
mod_tree_remove(mod); |
1fb9341ac module: put modul... |
3767 |
wake_up_all(&module_wq); |
0be964be0 module: Sanitize ... |
3768 |
/* Wait for RCU-sched synchronizing before releasing mod->list. */ |
cb2f55369 modules: Replace ... |
3769 |
synchronize_rcu(); |
1fb9341ac module: put modul... |
3770 |
mutex_unlock(&module_mutex); |
d913188c7 module: layout_an... |
3771 |
free_module: |
35a9393c9 lockdep: Fix the ... |
3772 |
/* Free lock-classes; relies on the preceding sync_rcu() */ |
7523e4dc5 module: use a str... |
3773 |
lockdep_free_key_range(mod->core_layout.base, mod->core_layout.size); |
35a9393c9 lockdep: Fix the ... |
3774 |
|
34e1169d9 module: add sysca... |
3775 |
module_deallocate(mod, info); |
d913188c7 module: layout_an... |
3776 |
free_copy: |
34e1169d9 module: add sysca... |
3777 3778 |
free_copy(info); return err; |
b99b87f70 kernel: construct... |
3779 |
} |
17da2bd90 [CVE-2009-0029] S... |
3780 3781 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
3782 |
{ |
34e1169d9 module: add sysca... |
3783 3784 |
int err; struct load_info info = { }; |
1da177e4c Linux-2.6.12-rc2 |
3785 |
|
34e1169d9 module: add sysca... |
3786 3787 3788 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3789 |
|
34e1169d9 module: add sysca... |
3790 3791 3792 |
pr_debug("init_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); |
1da177e4c Linux-2.6.12-rc2 |
3793 |
|
34e1169d9 module: add sysca... |
3794 3795 3796 |
err = copy_module_from_user(umod, len, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3797 |
|
2f3238aeb module: add flags... |
3798 |
return load_module(&info, uargs, 0); |
34e1169d9 module: add sysca... |
3799 |
} |
94462ad3b module: Move RO/N... |
3800 |
|
2f3238aeb module: add flags... |
3801 |
SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags) |
34e1169d9 module: add sysca... |
3802 |
{ |
34e1169d9 module: add sysca... |
3803 |
struct load_info info = { }; |
a1db74209 module: replace c... |
3804 3805 3806 |
loff_t size; void *hdr; int err; |
94462ad3b module: Move RO/N... |
3807 |
|
34e1169d9 module: add sysca... |
3808 3809 3810 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3811 |
|
2f3238aeb module: add flags... |
3812 3813 |
pr_debug("finit_module: fd=%d, uargs=%p, flags=%i ", fd, uargs, flags); |
6c5db22d2 modules: fix modu... |
3814 |
|
2f3238aeb module: add flags... |
3815 3816 3817 |
if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS |MODULE_INIT_IGNORE_VERMAGIC)) return -EINVAL; |
d6de2c80e async: Fix module... |
3818 |
|
a1db74209 module: replace c... |
3819 3820 |
err = kernel_read_file_from_fd(fd, &hdr, &size, INT_MAX, READING_MODULE); |
34e1169d9 module: add sysca... |
3821 3822 |
if (err) return err; |
a1db74209 module: replace c... |
3823 3824 |
info.hdr = hdr; info.len = size; |
1da177e4c Linux-2.6.12-rc2 |
3825 |
|
2f3238aeb module: add flags... |
3826 |
return load_module(&info, uargs, flags); |
1da177e4c Linux-2.6.12-rc2 |
3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 |
} 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) { |
2e3a10a15 ARM: avoid ARM bi... |
3841 3842 |
if (str[0] == '.' && str[1] == 'L') return true; |
6c34f1f54 aarch64: filter $... |
3843 |
return str[0] == '$' && strchr("axtd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
3844 3845 |
&& (str[2] == '\0' || str[2] == '.'); } |
2d25bc552 module: make it c... |
3846 |
static const char *kallsyms_symbol_name(struct mod_kallsyms *kallsyms, unsigned int symnum) |
2e7bac536 module: wrapper f... |
3847 |
{ |
8244062ef modules: fix long... |
3848 |
return kallsyms->strtab + kallsyms->symtab[symnum].st_name; |
2e7bac536 module: wrapper f... |
3849 |
} |
2d25bc552 module: make it c... |
3850 3851 3852 3853 3854 3855 3856 3857 |
/* * Given a module and address, find the corresponding symbol and return its name * while providing its size and offset if needed. */ static const char *find_kallsyms_symbol(struct module *mod, unsigned long addr, unsigned long *size, unsigned long *offset) |
1da177e4c Linux-2.6.12-rc2 |
3858 3859 |
{ unsigned int i, best = 0; |
93d77e7f1 ARM: module: Fix ... |
3860 |
unsigned long nextval, bestval; |
8244062ef modules: fix long... |
3861 |
struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms); |
1da177e4c Linux-2.6.12-rc2 |
3862 3863 |
/* At worse, next value is at end of module */ |
a06f6211e module: add withi... |
3864 |
if (within_module_init(addr, mod)) |
7523e4dc5 module: use a str... |
3865 |
nextval = (unsigned long)mod->init_layout.base+mod->init_layout.text_size; |
22a8bdeb5 whitespace fixes:... |
3866 |
else |
7523e4dc5 module: use a str... |
3867 |
nextval = (unsigned long)mod->core_layout.base+mod->core_layout.text_size; |
1da177e4c Linux-2.6.12-rc2 |
3868 |
|
93d77e7f1 ARM: module: Fix ... |
3869 |
bestval = kallsyms_symbol_value(&kallsyms->symtab[best]); |
25985edce Fix common misspe... |
3870 |
/* Scan for closest preceding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
3871 |
starts real symbols at 1). */ |
8244062ef modules: fix long... |
3872 |
for (i = 1; i < kallsyms->num_symtab; i++) { |
93d77e7f1 ARM: module: Fix ... |
3873 3874 3875 3876 |
const Elf_Sym *sym = &kallsyms->symtab[i]; unsigned long thisval = kallsyms_symbol_value(sym); if (sym->st_shndx == SHN_UNDEF) |
1da177e4c Linux-2.6.12-rc2 |
3877 3878 3879 3880 |
continue; /* We ignore unnamed symbols: they're uninformative * and inserted at a whim. */ |
2d25bc552 module: make it c... |
3881 3882 |
if (*kallsyms_symbol_name(kallsyms, i) == '\0' || is_arm_mapping_symbol(kallsyms_symbol_name(kallsyms, i))) |
2e7bac536 module: wrapper f... |
3883 |
continue; |
93d77e7f1 ARM: module: Fix ... |
3884 |
if (thisval <= addr && thisval > bestval) { |
1da177e4c Linux-2.6.12-rc2 |
3885 |
best = i; |
93d77e7f1 ARM: module: Fix ... |
3886 3887 3888 3889 |
bestval = thisval; } if (thisval > addr && thisval < nextval) nextval = thisval; |
1da177e4c Linux-2.6.12-rc2 |
3890 3891 3892 3893 |
} if (!best) return NULL; |
ffb451227 Simplify kallsyms... |
3894 |
if (size) |
93d77e7f1 ARM: module: Fix ... |
3895 |
*size = nextval - bestval; |
ffb451227 Simplify kallsyms... |
3896 |
if (offset) |
93d77e7f1 ARM: module: Fix ... |
3897 |
*offset = addr - bestval; |
2d25bc552 module: make it c... |
3898 3899 |
return kallsyms_symbol_name(kallsyms, best); |
1da177e4c Linux-2.6.12-rc2 |
3900 |
} |
b865ea643 sections: split d... |
3901 3902 3903 3904 3905 |
void * __weak dereference_module_function_descriptor(struct module *mod, void *ptr) { return ptr; } |
6dd06c9fb module: make modu... |
3906 3907 |
/* 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... |
3908 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
3909 3910 3911 3912 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
3913 |
{ |
cb2a52052 modules: de-mutex... |
3914 |
const char *ret = NULL; |
b7df4d1b2 module: Use __mod... |
3915 |
struct module *mod; |
1da177e4c Linux-2.6.12-rc2 |
3916 |
|
cb2a52052 modules: de-mutex... |
3917 |
preempt_disable(); |
b7df4d1b2 module: Use __mod... |
3918 3919 3920 3921 |
mod = __module_address(addr); if (mod) { if (modname) *modname = mod->name; |
2d25bc552 module: make it c... |
3922 3923 |
ret = find_kallsyms_symbol(mod, addr, size, offset); |
1da177e4c Linux-2.6.12-rc2 |
3924 |
} |
6dd06c9fb module: make modu... |
3925 3926 3927 3928 3929 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
3930 |
preempt_enable(); |
b7df4d1b2 module: Use __mod... |
3931 |
|
92dfc9dc7 fix "modules: mak... |
3932 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
3933 |
} |
9d65cb4a1 Fix race between ... |
3934 3935 3936 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3937 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3938 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3939 3940 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3941 |
if (within_module(addr, mod)) { |
9d65cb4a1 Fix race between ... |
3942 |
const char *sym; |
2d25bc552 module: make it c... |
3943 |
sym = find_kallsyms_symbol(mod, addr, NULL, NULL); |
9d65cb4a1 Fix race between ... |
3944 3945 |
if (!sym) goto out; |
2d25bc552 module: make it c... |
3946 |
|
9281acea6 kallsyms: make KS... |
3947 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3948 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3949 3950 3951 3952 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3953 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3954 3955 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
3956 3957 3958 3959 |
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... |
3960 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3961 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3962 3963 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3964 |
if (within_module(addr, mod)) { |
a5c43dae7 Fix race between ... |
3965 |
const char *sym; |
2d25bc552 module: make it c... |
3966 |
sym = find_kallsyms_symbol(mod, addr, size, offset); |
a5c43dae7 Fix race between ... |
3967 3968 3969 |
if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
3970 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
3971 |
if (name) |
9281acea6 kallsyms: make KS... |
3972 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3973 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3974 3975 3976 3977 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3978 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3979 3980 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
3981 3982 |
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 |
3983 3984 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3985 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3986 |
list_for_each_entry_rcu(mod, &modules, list) { |
8244062ef modules: fix long... |
3987 |
struct mod_kallsyms *kallsyms; |
0d21b0e34 module: add new s... |
3988 3989 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
8244062ef modules: fix long... |
3990 3991 |
kallsyms = rcu_dereference_sched(mod->kallsyms); if (symnum < kallsyms->num_symtab) { |
93d77e7f1 ARM: module: Fix ... |
3992 3993 3994 |
const Elf_Sym *sym = &kallsyms->symtab[symnum]; *value = kallsyms_symbol_value(sym); |
1c7651f43 kallsyms: store t... |
3995 |
*type = kallsyms->typetab[symnum]; |
2d25bc552 module: make it c... |
3996 |
strlcpy(name, kallsyms_symbol_name(kallsyms, symnum), KSYM_NAME_LEN); |
9281acea6 kallsyms: make KS... |
3997 |
strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
3998 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
3999 |
preempt_enable(); |
ea07890a6 Fix race between ... |
4000 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
4001 |
} |
8244062ef modules: fix long... |
4002 |
symnum -= kallsyms->num_symtab; |
1da177e4c Linux-2.6.12-rc2 |
4003 |
} |
cb2a52052 modules: de-mutex... |
4004 |
preempt_enable(); |
ea07890a6 Fix race between ... |
4005 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
4006 |
} |
2d25bc552 module: make it c... |
4007 4008 |
/* Given a module and name of symbol, find and return the symbol's value */ static unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name) |
1da177e4c Linux-2.6.12-rc2 |
4009 4010 |
{ unsigned int i; |
8244062ef modules: fix long... |
4011 |
struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms); |
1da177e4c Linux-2.6.12-rc2 |
4012 |
|
93d77e7f1 ARM: module: Fix ... |
4013 4014 |
for (i = 0; i < kallsyms->num_symtab; i++) { const Elf_Sym *sym = &kallsyms->symtab[i]; |
2d25bc552 module: make it c... |
4015 |
if (strcmp(name, kallsyms_symbol_name(kallsyms, i)) == 0 && |
93d77e7f1 ARM: module: Fix ... |
4016 4017 4018 |
sym->st_shndx != SHN_UNDEF) return kallsyms_symbol_value(sym); } |
1da177e4c Linux-2.6.12-rc2 |
4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 |
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... |
4030 |
preempt_disable(); |
175861882 kallsyms: Use bou... |
4031 |
if ((colon = strnchr(name, MODULE_NAME_LEN, ':')) != NULL) { |
4f6de4d51 module: don't mod... |
4032 |
if ((mod = find_module_all(name, colon - name, false)) != NULL) |
2d25bc552 module: make it c... |
4033 |
ret = find_kallsyms_symbol_value(mod, colon+1); |
1da177e4c Linux-2.6.12-rc2 |
4034 |
} else { |
0d21b0e34 module: add new s... |
4035 4036 4037 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
2d25bc552 module: make it c... |
4038 |
if ((ret = find_kallsyms_symbol_value(mod, name)) != 0) |
1da177e4c Linux-2.6.12-rc2 |
4039 |
break; |
0d21b0e34 module: add new s... |
4040 |
} |
1da177e4c Linux-2.6.12-rc2 |
4041 |
} |
cb2a52052 modules: de-mutex... |
4042 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
4043 4044 |
return ret; } |
75a66614d Ksplice: Add func... |
4045 4046 4047 4048 4049 4050 4051 4052 |
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; |
0be964be0 module: Sanitize ... |
4053 |
module_assert_mutex(); |
75a66614d Ksplice: Add func... |
4054 |
list_for_each_entry(mod, &modules, list) { |
8244062ef modules: fix long... |
4055 4056 |
/* We hold module_mutex: no need for rcu_dereference_sched */ struct mod_kallsyms *kallsyms = mod->kallsyms; |
0d21b0e34 module: add new s... |
4057 4058 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
8244062ef modules: fix long... |
4059 |
for (i = 0; i < kallsyms->num_symtab; i++) { |
93d77e7f1 ARM: module: Fix ... |
4060 |
const Elf_Sym *sym = &kallsyms->symtab[i]; |
9f2d1e68c module: exclude S... |
4061 |
|
93d77e7f1 ARM: module: Fix ... |
4062 |
if (sym->st_shndx == SHN_UNDEF) |
9f2d1e68c module: exclude S... |
4063 |
continue; |
2d25bc552 module: make it c... |
4064 |
ret = fn(data, kallsyms_symbol_name(kallsyms, i), |
93d77e7f1 ARM: module: Fix ... |
4065 |
mod, kallsyms_symbol_value(sym)); |
75a66614d Ksplice: Add func... |
4066 4067 4068 4069 4070 4071 |
if (ret != 0) return ret; } } return 0; } |
1da177e4c Linux-2.6.12-rc2 |
4072 |
#endif /* CONFIG_KALLSYMS */ |
7fd8329ba taint/module: Cle... |
4073 4074 4075 4076 |
/* Maximum number of characters written by module_flags() */ #define MODULE_FLAGS_BUF_SIZE (TAINT_FLAGS_COUNT + 4) /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */ |
21aa9280b debug: show being... |
4077 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
4078 4079 |
{ int bx = 0; |
0d21b0e34 module: add new s... |
4080 |
BUG_ON(mod->state == MODULE_STATE_UNFORMED); |
21aa9280b debug: show being... |
4081 4082 4083 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
4084 |
buf[bx++] = '('; |
cca3e7073 modules: sysfs - ... |
4085 |
bx += module_flags_taint(mod, buf + bx); |
21aa9280b debug: show being... |
4086 4087 4088 4089 4090 4091 |
/* 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... |
4092 4093 4094 4095 4096 4097 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 |
#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 |
4115 4116 4117 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
7fd8329ba taint/module: Cle... |
4118 |
char buf[MODULE_FLAGS_BUF_SIZE]; |
668533dc0 kallsyms: take ad... |
4119 |
void *value; |
fa3ba2e81 [PATCH] fix Modul... |
4120 |
|
0d21b0e34 module: add new s... |
4121 4122 4123 |
/* We always ignore unformed modules. */ if (mod->state == MODULE_STATE_UNFORMED) return 0; |
2f0f2a334 module: turn long... |
4124 |
seq_printf(m, "%s %u", |
7523e4dc5 module: use a str... |
4125 |
mod->name, mod->init_layout.size + mod->core_layout.size); |
1da177e4c Linux-2.6.12-rc2 |
4126 4127 4128 4129 |
print_unload_info(m, mod); /* Informative for users. */ seq_printf(m, " %s", |
6da0b5651 kernel:module Fix... |
4130 4131 |
mod->state == MODULE_STATE_GOING ? "Unloading" : mod->state == MODULE_STATE_COMING ? "Loading" : |
1da177e4c Linux-2.6.12-rc2 |
4132 4133 |
"Live"); /* Used by oprofile and other similar tools. */ |
668533dc0 kallsyms: take ad... |
4134 4135 |
value = m->private ? NULL : mod->core_layout.base; seq_printf(m, " 0x%px", value); |
1da177e4c Linux-2.6.12-rc2 |
4136 |
|
fa3ba2e81 [PATCH] fix Modul... |
4137 4138 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
4139 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
4140 |
|
6da0b5651 kernel:module Fix... |
4141 4142 |
seq_puts(m, " "); |
1da177e4c Linux-2.6.12-rc2 |
4143 4144 4145 4146 4147 4148 4149 4150 |
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/... |
4151 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
4152 4153 4154 4155 4156 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
516fb7f2e /proc/module: use... |
4157 4158 4159 4160 4161 4162 4163 |
/* * This also sets the "private" pointer to non-NULL if the * kernel pointers should be hidden (so you can just test * "m->private" to see if you should keep the values private). * * We use the same logic as for /proc/kallsyms. */ |
3b5d5c6b0 proc: move /proc/... |
4164 4165 |
static int modules_open(struct inode *inode, struct file *file) { |
516fb7f2e /proc/module: use... |
4166 4167 4168 4169 4170 4171 |
int err = seq_open(file, &modules_op); if (!err) { struct seq_file *m = file->private_data; m->private = kallsyms_show_value() ? NULL : (void *)8ul; } |
3f553b308 module: propagate... |
4172 |
return err; |
3b5d5c6b0 proc: move /proc/... |
4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 |
} 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 |
4189 4190 4191 |
/* 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 |
4192 4193 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
4194 |
preempt_disable(); |
5ff22646d module: Optimize ... |
4195 4196 4197 |
mod = __module_address(addr); if (!mod) goto out; |
22a8bdeb5 whitespace fixes:... |
4198 |
|
5ff22646d module: Optimize ... |
4199 4200 4201 4202 |
if (!mod->num_exentries) goto out; e = search_extable(mod->extable, |
a94c33dd1 lib/extable.c: us... |
4203 |
mod->num_exentries, |
5ff22646d module: Optimize ... |
4204 4205 |
addr); out: |
24da1cbff modules: remove m... |
4206 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
4207 |
|
5ff22646d module: Optimize ... |
4208 4209 4210 4211 |
/* * Now, if we found one, we are running inside it now, hence * we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
4212 4213 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
4214 |
/* |
e610499e2 module: __module_... |
4215 4216 4217 4218 4219 |
* 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: ... |
4220 |
*/ |
e610499e2 module: __module_... |
4221 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
4222 |
{ |
e610499e2 module: __module_... |
4223 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
4224 |
|
24da1cbff modules: remove m... |
4225 |
preempt_disable(); |
e610499e2 module: __module_... |
4226 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
4227 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
4228 |
|
e610499e2 module: __module_... |
4229 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
4230 |
} |
e610499e2 module: __module_... |
4231 4232 4233 4234 4235 4236 4237 |
/* * __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... |
4238 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
4239 4240 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
4241 4242 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
0be964be0 module: Sanitize ... |
4243 |
module_assert_mutex_or_preempt(); |
6c9692e2d module: Make the ... |
4244 |
mod = mod_find(addr); |
93c2e105f module: Optimize ... |
4245 4246 |
if (mod) { BUG_ON(!within_module(addr, mod)); |
0d21b0e34 module: add new s... |
4247 |
if (mod->state == MODULE_STATE_UNFORMED) |
93c2e105f module: Optimize ... |
4248 |
mod = NULL; |
0d21b0e34 module: add new s... |
4249 |
} |
93c2e105f module: Optimize ... |
4250 |
return mod; |
1da177e4c Linux-2.6.12-rc2 |
4251 |
} |
c6b378019 module: Export sy... |
4252 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
4253 |
|
e610499e2 module: __module_... |
4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 |
/* * 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. */ |
7523e4dc5 module: use a str... |
4285 4286 |
if (!within(addr, mod->init_layout.base, mod->init_layout.text_size) && !within(addr, mod->core_layout.base, mod->core_layout.text_size)) |
e610499e2 module: __module_... |
4287 4288 4289 4290 |
mod = NULL; } return mod; } |
c6b378019 module: Export sy... |
4291 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
4292 |
|
1da177e4c Linux-2.6.12-rc2 |
4293 4294 4295 4296 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
7fd8329ba taint/module: Cle... |
4297 |
char buf[MODULE_FLAGS_BUF_SIZE]; |
1da177e4c Linux-2.6.12-rc2 |
4298 |
|
b231125af printk: add KERN_... |
4299 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
4300 4301 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); |
0d21b0e34 module: add new s... |
4302 4303 4304 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
27bba4d6b module: use pr_cont |
4305 |
pr_cont(" %s%s", mod->name, module_flags(mod, buf)); |
0d21b0e34 module: add new s... |
4306 |
} |
d72b37513 Remove stop_machi... |
4307 |
preempt_enable(); |
e14af7eeb debug: track and ... |
4308 |
if (last_unloaded_module[0]) |
27bba4d6b module: use pr_cont |
4309 4310 4311 |
pr_cont(" [last unloaded: %s]", last_unloaded_module); pr_cont(" "); |
1da177e4c Linux-2.6.12-rc2 |
4312 |
} |
1da177e4c Linux-2.6.12-rc2 |
4313 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
4314 4315 4316 4317 4318 4319 |
/* 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 ... |
4320 |
struct tracepoint * const *tp) |
8c8ef42ae module: include o... |
4321 4322 4323 |
{ } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
4324 |
#endif |