Root/
1 | /* |
2 | * fs/proc/kcore.c kernel ELF core dumper |
3 | * |
4 | * Modelled on fs/exec.c:aout_core_dump() |
5 | * Jeremy Fitzhardinge <jeremy@sw.oz.au> |
6 | * ELF version written by David Howells <David.Howells@nexor.co.uk> |
7 | * Modified and incorporated into 2.3.x by Tigran Aivazian <tigran@veritas.com> |
8 | * Support to dump vmalloc'd areas (ELF only), Tigran Aivazian <tigran@veritas.com> |
9 | * Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com> |
10 | */ |
11 | |
12 | #include <linux/mm.h> |
13 | #include <linux/proc_fs.h> |
14 | #include <linux/user.h> |
15 | #include <linux/capability.h> |
16 | #include <linux/elf.h> |
17 | #include <linux/elfcore.h> |
18 | #include <linux/vmalloc.h> |
19 | #include <linux/highmem.h> |
20 | #include <linux/bootmem.h> |
21 | #include <linux/init.h> |
22 | #include <linux/slab.h> |
23 | #include <asm/uaccess.h> |
24 | #include <asm/io.h> |
25 | #include <linux/list.h> |
26 | #include <linux/ioport.h> |
27 | #include <linux/memory.h> |
28 | #include <asm/sections.h> |
29 | |
30 | #define CORE_STR "CORE" |
31 | |
32 | #ifndef ELF_CORE_EFLAGS |
33 | #define ELF_CORE_EFLAGS 0 |
34 | #endif |
35 | |
36 | static struct proc_dir_entry *proc_root_kcore; |
37 | |
38 | |
39 | #ifndef kc_vaddr_to_offset |
40 | #define kc_vaddr_to_offset(v) ((v) - PAGE_OFFSET) |
41 | #endif |
42 | #ifndef kc_offset_to_vaddr |
43 | #define kc_offset_to_vaddr(o) ((o) + PAGE_OFFSET) |
44 | #endif |
45 | |
46 | /* An ELF note in memory */ |
47 | struct memelfnote |
48 | { |
49 | const char *name; |
50 | int type; |
51 | unsigned int datasz; |
52 | void *data; |
53 | }; |
54 | |
55 | static LIST_HEAD(kclist_head); |
56 | static DEFINE_RWLOCK(kclist_lock); |
57 | static int kcore_need_update = 1; |
58 | |
59 | void |
60 | kclist_add(struct kcore_list *new, void *addr, size_t size, int type) |
61 | { |
62 | new->addr = (unsigned long)addr; |
63 | new->size = size; |
64 | new->type = type; |
65 | |
66 | write_lock(&kclist_lock); |
67 | list_add_tail(&new->list, &kclist_head); |
68 | write_unlock(&kclist_lock); |
69 | } |
70 | |
71 | static size_t get_kcore_size(int *nphdr, size_t *elf_buflen) |
72 | { |
73 | size_t try, size; |
74 | struct kcore_list *m; |
75 | |
76 | *nphdr = 1; /* PT_NOTE */ |
77 | size = 0; |
78 | |
79 | list_for_each_entry(m, &kclist_head, list) { |
80 | try = kc_vaddr_to_offset((size_t)m->addr + m->size); |
81 | if (try > size) |
82 | size = try; |
83 | *nphdr = *nphdr + 1; |
84 | } |
85 | *elf_buflen = sizeof(struct elfhdr) + |
86 | (*nphdr + 2)*sizeof(struct elf_phdr) + |
87 | 3 * ((sizeof(struct elf_note)) + |
88 | roundup(sizeof(CORE_STR), 4)) + |
89 | roundup(sizeof(struct elf_prstatus), 4) + |
90 | roundup(sizeof(struct elf_prpsinfo), 4) + |
91 | roundup(sizeof(struct task_struct), 4); |
92 | *elf_buflen = PAGE_ALIGN(*elf_buflen); |
93 | return size + *elf_buflen; |
94 | } |
95 | |
96 | static void free_kclist_ents(struct list_head *head) |
97 | { |
98 | struct kcore_list *tmp, *pos; |
99 | |
100 | list_for_each_entry_safe(pos, tmp, head, list) { |
101 | list_del(&pos->list); |
102 | kfree(pos); |
103 | } |
104 | } |
105 | /* |
106 | * Replace all KCORE_RAM/KCORE_VMEMMAP information with passed list. |
107 | */ |
108 | static void __kcore_update_ram(struct list_head *list) |
109 | { |
110 | int nphdr; |
111 | size_t size; |
112 | struct kcore_list *tmp, *pos; |
113 | LIST_HEAD(garbage); |
114 | |
115 | write_lock(&kclist_lock); |
116 | if (kcore_need_update) { |
117 | list_for_each_entry_safe(pos, tmp, &kclist_head, list) { |
118 | if (pos->type == KCORE_RAM |
119 | || pos->type == KCORE_VMEMMAP) |
120 | list_move(&pos->list, &garbage); |
121 | } |
122 | list_splice_tail(list, &kclist_head); |
123 | } else |
124 | list_splice(list, &garbage); |
125 | kcore_need_update = 0; |
126 | proc_root_kcore->size = get_kcore_size(&nphdr, &size); |
127 | write_unlock(&kclist_lock); |
128 | |
129 | free_kclist_ents(&garbage); |
130 | } |
131 | |
132 | |
133 | #ifdef CONFIG_HIGHMEM |
134 | /* |
135 | * If no highmem, we can assume [0...max_low_pfn) continuous range of memory |
136 | * because memory hole is not as big as !HIGHMEM case. |
137 | * (HIGHMEM is special because part of memory is _invisible_ from the kernel.) |
138 | */ |
139 | static int kcore_update_ram(void) |
140 | { |
141 | LIST_HEAD(head); |
142 | struct kcore_list *ent; |
143 | int ret = 0; |
144 | |
145 | ent = kmalloc(sizeof(*ent), GFP_KERNEL); |
146 | if (!ent) |
147 | return -ENOMEM; |
148 | ent->addr = (unsigned long)__va(0); |
149 | ent->size = max_low_pfn << PAGE_SHIFT; |
150 | ent->type = KCORE_RAM; |
151 | list_add(&ent->list, &head); |
152 | __kcore_update_ram(&head); |
153 | return ret; |
154 | } |
155 | |
156 | #else /* !CONFIG_HIGHMEM */ |
157 | |
158 | #ifdef CONFIG_SPARSEMEM_VMEMMAP |
159 | /* calculate vmemmap's address from given system ram pfn and register it */ |
160 | int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) |
161 | { |
162 | unsigned long pfn = __pa(ent->addr) >> PAGE_SHIFT; |
163 | unsigned long nr_pages = ent->size >> PAGE_SHIFT; |
164 | unsigned long start, end; |
165 | struct kcore_list *vmm, *tmp; |
166 | |
167 | |
168 | start = ((unsigned long)pfn_to_page(pfn)) & PAGE_MASK; |
169 | end = ((unsigned long)pfn_to_page(pfn + nr_pages)) - 1; |
170 | end = ALIGN(end, PAGE_SIZE); |
171 | /* overlap check (because we have to align page */ |
172 | list_for_each_entry(tmp, head, list) { |
173 | if (tmp->type != KCORE_VMEMMAP) |
174 | continue; |
175 | if (start < tmp->addr + tmp->size) |
176 | if (end > tmp->addr) |
177 | end = tmp->addr; |
178 | } |
179 | if (start < end) { |
180 | vmm = kmalloc(sizeof(*vmm), GFP_KERNEL); |
181 | if (!vmm) |
182 | return 0; |
183 | vmm->addr = start; |
184 | vmm->size = end - start; |
185 | vmm->type = KCORE_VMEMMAP; |
186 | list_add_tail(&vmm->list, head); |
187 | } |
188 | return 1; |
189 | |
190 | } |
191 | #else |
192 | int get_sparsemem_vmemmap_info(struct kcore_list *ent, struct list_head *head) |
193 | { |
194 | return 1; |
195 | } |
196 | |
197 | #endif |
198 | |
199 | static int |
200 | kclist_add_private(unsigned long pfn, unsigned long nr_pages, void *arg) |
201 | { |
202 | struct list_head *head = (struct list_head *)arg; |
203 | struct kcore_list *ent; |
204 | |
205 | ent = kmalloc(sizeof(*ent), GFP_KERNEL); |
206 | if (!ent) |
207 | return -ENOMEM; |
208 | ent->addr = (unsigned long)__va((pfn << PAGE_SHIFT)); |
209 | ent->size = nr_pages << PAGE_SHIFT; |
210 | |
211 | /* Sanity check: Can happen in 32bit arch...maybe */ |
212 | if (ent->addr < (unsigned long) __va(0)) |
213 | goto free_out; |
214 | |
215 | /* cut not-mapped area. ....from ppc-32 code. */ |
216 | if (ULONG_MAX - ent->addr < ent->size) |
217 | ent->size = ULONG_MAX - ent->addr; |
218 | |
219 | /* cut when vmalloc() area is higher than direct-map area */ |
220 | if (VMALLOC_START > (unsigned long)__va(0)) { |
221 | if (ent->addr > VMALLOC_START) |
222 | goto free_out; |
223 | if (VMALLOC_START - ent->addr < ent->size) |
224 | ent->size = VMALLOC_START - ent->addr; |
225 | } |
226 | |
227 | ent->type = KCORE_RAM; |
228 | list_add_tail(&ent->list, head); |
229 | |
230 | if (!get_sparsemem_vmemmap_info(ent, head)) { |
231 | list_del(&ent->list); |
232 | goto free_out; |
233 | } |
234 | |
235 | return 0; |
236 | free_out: |
237 | kfree(ent); |
238 | return 1; |
239 | } |
240 | |
241 | static int kcore_update_ram(void) |
242 | { |
243 | int nid, ret; |
244 | unsigned long end_pfn; |
245 | LIST_HEAD(head); |
246 | |
247 | /* Not inialized....update now */ |
248 | /* find out "max pfn" */ |
249 | end_pfn = 0; |
250 | for_each_node_state(nid, N_HIGH_MEMORY) { |
251 | unsigned long node_end; |
252 | node_end = NODE_DATA(nid)->node_start_pfn + |
253 | NODE_DATA(nid)->node_spanned_pages; |
254 | if (end_pfn < node_end) |
255 | end_pfn = node_end; |
256 | } |
257 | /* scan 0 to max_pfn */ |
258 | ret = walk_system_ram_range(0, end_pfn, &head, kclist_add_private); |
259 | if (ret) { |
260 | free_kclist_ents(&head); |
261 | return -ENOMEM; |
262 | } |
263 | __kcore_update_ram(&head); |
264 | return ret; |
265 | } |
266 | #endif /* CONFIG_HIGHMEM */ |
267 | |
268 | /*****************************************************************************/ |
269 | /* |
270 | * determine size of ELF note |
271 | */ |
272 | static int notesize(struct memelfnote *en) |
273 | { |
274 | int sz; |
275 | |
276 | sz = sizeof(struct elf_note); |
277 | sz += roundup((strlen(en->name) + 1), 4); |
278 | sz += roundup(en->datasz, 4); |
279 | |
280 | return sz; |
281 | } /* end notesize() */ |
282 | |
283 | /*****************************************************************************/ |
284 | /* |
285 | * store a note in the header buffer |
286 | */ |
287 | static char *storenote(struct memelfnote *men, char *bufp) |
288 | { |
289 | struct elf_note en; |
290 | |
291 | #define DUMP_WRITE(addr,nr) do { memcpy(bufp,addr,nr); bufp += nr; } while(0) |
292 | |
293 | en.n_namesz = strlen(men->name) + 1; |
294 | en.n_descsz = men->datasz; |
295 | en.n_type = men->type; |
296 | |
297 | DUMP_WRITE(&en, sizeof(en)); |
298 | DUMP_WRITE(men->name, en.n_namesz); |
299 | |
300 | /* XXX - cast from long long to long to avoid need for libgcc.a */ |
301 | bufp = (char*) roundup((unsigned long)bufp,4); |
302 | DUMP_WRITE(men->data, men->datasz); |
303 | bufp = (char*) roundup((unsigned long)bufp,4); |
304 | |
305 | #undef DUMP_WRITE |
306 | |
307 | return bufp; |
308 | } /* end storenote() */ |
309 | |
310 | /* |
311 | * store an ELF coredump header in the supplied buffer |
312 | * nphdr is the number of elf_phdr to insert |
313 | */ |
314 | static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff) |
315 | { |
316 | struct elf_prstatus prstatus; /* NT_PRSTATUS */ |
317 | struct elf_prpsinfo prpsinfo; /* NT_PRPSINFO */ |
318 | struct elf_phdr *nhdr, *phdr; |
319 | struct elfhdr *elf; |
320 | struct memelfnote notes[3]; |
321 | off_t offset = 0; |
322 | struct kcore_list *m; |
323 | |
324 | /* setup ELF header */ |
325 | elf = (struct elfhdr *) bufp; |
326 | bufp += sizeof(struct elfhdr); |
327 | offset += sizeof(struct elfhdr); |
328 | memcpy(elf->e_ident, ELFMAG, SELFMAG); |
329 | elf->e_ident[EI_CLASS] = ELF_CLASS; |
330 | elf->e_ident[EI_DATA] = ELF_DATA; |
331 | elf->e_ident[EI_VERSION]= EV_CURRENT; |
332 | elf->e_ident[EI_OSABI] = ELF_OSABI; |
333 | memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD); |
334 | elf->e_type = ET_CORE; |
335 | elf->e_machine = ELF_ARCH; |
336 | elf->e_version = EV_CURRENT; |
337 | elf->e_entry = 0; |
338 | elf->e_phoff = sizeof(struct elfhdr); |
339 | elf->e_shoff = 0; |
340 | elf->e_flags = ELF_CORE_EFLAGS; |
341 | elf->e_ehsize = sizeof(struct elfhdr); |
342 | elf->e_phentsize= sizeof(struct elf_phdr); |
343 | elf->e_phnum = nphdr; |
344 | elf->e_shentsize= 0; |
345 | elf->e_shnum = 0; |
346 | elf->e_shstrndx = 0; |
347 | |
348 | /* setup ELF PT_NOTE program header */ |
349 | nhdr = (struct elf_phdr *) bufp; |
350 | bufp += sizeof(struct elf_phdr); |
351 | offset += sizeof(struct elf_phdr); |
352 | nhdr->p_type = PT_NOTE; |
353 | nhdr->p_offset = 0; |
354 | nhdr->p_vaddr = 0; |
355 | nhdr->p_paddr = 0; |
356 | nhdr->p_filesz = 0; |
357 | nhdr->p_memsz = 0; |
358 | nhdr->p_flags = 0; |
359 | nhdr->p_align = 0; |
360 | |
361 | /* setup ELF PT_LOAD program header for every area */ |
362 | list_for_each_entry(m, &kclist_head, list) { |
363 | phdr = (struct elf_phdr *) bufp; |
364 | bufp += sizeof(struct elf_phdr); |
365 | offset += sizeof(struct elf_phdr); |
366 | |
367 | phdr->p_type = PT_LOAD; |
368 | phdr->p_flags = PF_R|PF_W|PF_X; |
369 | phdr->p_offset = kc_vaddr_to_offset(m->addr) + dataoff; |
370 | phdr->p_vaddr = (size_t)m->addr; |
371 | phdr->p_paddr = 0; |
372 | phdr->p_filesz = phdr->p_memsz = m->size; |
373 | phdr->p_align = PAGE_SIZE; |
374 | } |
375 | |
376 | /* |
377 | * Set up the notes in similar form to SVR4 core dumps made |
378 | * with info from their /proc. |
379 | */ |
380 | nhdr->p_offset = offset; |
381 | |
382 | /* set up the process status */ |
383 | notes[0].name = CORE_STR; |
384 | notes[0].type = NT_PRSTATUS; |
385 | notes[0].datasz = sizeof(struct elf_prstatus); |
386 | notes[0].data = &prstatus; |
387 | |
388 | memset(&prstatus, 0, sizeof(struct elf_prstatus)); |
389 | |
390 | nhdr->p_filesz = notesize(¬es[0]); |
391 | bufp = storenote(¬es[0], bufp); |
392 | |
393 | /* set up the process info */ |
394 | notes[1].name = CORE_STR; |
395 | notes[1].type = NT_PRPSINFO; |
396 | notes[1].datasz = sizeof(struct elf_prpsinfo); |
397 | notes[1].data = &prpsinfo; |
398 | |
399 | memset(&prpsinfo, 0, sizeof(struct elf_prpsinfo)); |
400 | prpsinfo.pr_state = 0; |
401 | prpsinfo.pr_sname = 'R'; |
402 | prpsinfo.pr_zomb = 0; |
403 | |
404 | strcpy(prpsinfo.pr_fname, "vmlinux"); |
405 | strncpy(prpsinfo.pr_psargs, saved_command_line, ELF_PRARGSZ); |
406 | |
407 | nhdr->p_filesz += notesize(¬es[1]); |
408 | bufp = storenote(¬es[1], bufp); |
409 | |
410 | /* set up the task structure */ |
411 | notes[2].name = CORE_STR; |
412 | notes[2].type = NT_TASKSTRUCT; |
413 | notes[2].datasz = sizeof(struct task_struct); |
414 | notes[2].data = current; |
415 | |
416 | nhdr->p_filesz += notesize(¬es[2]); |
417 | bufp = storenote(¬es[2], bufp); |
418 | |
419 | } /* end elf_kcore_store_hdr() */ |
420 | |
421 | /*****************************************************************************/ |
422 | /* |
423 | * read from the ELF header and then kernel memory |
424 | */ |
425 | static ssize_t |
426 | read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) |
427 | { |
428 | ssize_t acc = 0; |
429 | size_t size, tsz; |
430 | size_t elf_buflen; |
431 | int nphdr; |
432 | unsigned long start; |
433 | |
434 | read_lock(&kclist_lock); |
435 | size = get_kcore_size(&nphdr, &elf_buflen); |
436 | |
437 | if (buflen == 0 || *fpos >= size) { |
438 | read_unlock(&kclist_lock); |
439 | return 0; |
440 | } |
441 | |
442 | /* trim buflen to not go beyond EOF */ |
443 | if (buflen > size - *fpos) |
444 | buflen = size - *fpos; |
445 | |
446 | /* construct an ELF core header if we'll need some of it */ |
447 | if (*fpos < elf_buflen) { |
448 | char * elf_buf; |
449 | |
450 | tsz = elf_buflen - *fpos; |
451 | if (buflen < tsz) |
452 | tsz = buflen; |
453 | elf_buf = kzalloc(elf_buflen, GFP_ATOMIC); |
454 | if (!elf_buf) { |
455 | read_unlock(&kclist_lock); |
456 | return -ENOMEM; |
457 | } |
458 | elf_kcore_store_hdr(elf_buf, nphdr, elf_buflen); |
459 | read_unlock(&kclist_lock); |
460 | if (copy_to_user(buffer, elf_buf + *fpos, tsz)) { |
461 | kfree(elf_buf); |
462 | return -EFAULT; |
463 | } |
464 | kfree(elf_buf); |
465 | buflen -= tsz; |
466 | *fpos += tsz; |
467 | buffer += tsz; |
468 | acc += tsz; |
469 | |
470 | /* leave now if filled buffer already */ |
471 | if (buflen == 0) |
472 | return acc; |
473 | } else |
474 | read_unlock(&kclist_lock); |
475 | |
476 | /* |
477 | * Check to see if our file offset matches with any of |
478 | * the addresses in the elf_phdr on our list. |
479 | */ |
480 | start = kc_offset_to_vaddr(*fpos - elf_buflen); |
481 | if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen) |
482 | tsz = buflen; |
483 | |
484 | while (buflen) { |
485 | struct kcore_list *m; |
486 | |
487 | read_lock(&kclist_lock); |
488 | list_for_each_entry(m, &kclist_head, list) { |
489 | if (start >= m->addr && start < (m->addr+m->size)) |
490 | break; |
491 | } |
492 | read_unlock(&kclist_lock); |
493 | |
494 | if (&m->list == &kclist_head) { |
495 | if (clear_user(buffer, tsz)) |
496 | return -EFAULT; |
497 | } else if (is_vmalloc_or_module_addr((void *)start)) { |
498 | char * elf_buf; |
499 | |
500 | elf_buf = kzalloc(tsz, GFP_KERNEL); |
501 | if (!elf_buf) |
502 | return -ENOMEM; |
503 | vread(elf_buf, (char *)start, tsz); |
504 | /* we have to zero-fill user buffer even if no read */ |
505 | if (copy_to_user(buffer, elf_buf, tsz)) { |
506 | kfree(elf_buf); |
507 | return -EFAULT; |
508 | } |
509 | kfree(elf_buf); |
510 | } else { |
511 | if (kern_addr_valid(start)) { |
512 | unsigned long n; |
513 | |
514 | n = copy_to_user(buffer, (char *)start, tsz); |
515 | /* |
516 | * We cannot distingush between fault on source |
517 | * and fault on destination. When this happens |
518 | * we clear too and hope it will trigger the |
519 | * EFAULT again. |
520 | */ |
521 | if (n) { |
522 | if (clear_user(buffer + tsz - n, |
523 | n)) |
524 | return -EFAULT; |
525 | } |
526 | } else { |
527 | if (clear_user(buffer, tsz)) |
528 | return -EFAULT; |
529 | } |
530 | } |
531 | buflen -= tsz; |
532 | *fpos += tsz; |
533 | buffer += tsz; |
534 | acc += tsz; |
535 | start += tsz; |
536 | tsz = (buflen > PAGE_SIZE ? PAGE_SIZE : buflen); |
537 | } |
538 | |
539 | return acc; |
540 | } |
541 | |
542 | |
543 | static int open_kcore(struct inode *inode, struct file *filp) |
544 | { |
545 | if (!capable(CAP_SYS_RAWIO)) |
546 | return -EPERM; |
547 | if (kcore_need_update) |
548 | kcore_update_ram(); |
549 | if (i_size_read(inode) != proc_root_kcore->size) { |
550 | mutex_lock(&inode->i_mutex); |
551 | i_size_write(inode, proc_root_kcore->size); |
552 | mutex_unlock(&inode->i_mutex); |
553 | } |
554 | return 0; |
555 | } |
556 | |
557 | |
558 | static const struct file_operations proc_kcore_operations = { |
559 | .read = read_kcore, |
560 | .open = open_kcore, |
561 | .llseek = default_llseek, |
562 | }; |
563 | |
564 | #ifdef CONFIG_MEMORY_HOTPLUG |
565 | /* just remember that we have to update kcore */ |
566 | static int __meminit kcore_callback(struct notifier_block *self, |
567 | unsigned long action, void *arg) |
568 | { |
569 | switch (action) { |
570 | case MEM_ONLINE: |
571 | case MEM_OFFLINE: |
572 | write_lock(&kclist_lock); |
573 | kcore_need_update = 1; |
574 | write_unlock(&kclist_lock); |
575 | } |
576 | return NOTIFY_OK; |
577 | } |
578 | #endif |
579 | |
580 | |
581 | static struct kcore_list kcore_vmalloc; |
582 | |
583 | #ifdef CONFIG_ARCH_PROC_KCORE_TEXT |
584 | static struct kcore_list kcore_text; |
585 | /* |
586 | * If defined, special segment is used for mapping kernel text instead of |
587 | * direct-map area. We need to create special TEXT section. |
588 | */ |
589 | static void __init proc_kcore_text_init(void) |
590 | { |
591 | kclist_add(&kcore_text, _text, _end - _text, KCORE_TEXT); |
592 | } |
593 | #else |
594 | static void __init proc_kcore_text_init(void) |
595 | { |
596 | } |
597 | #endif |
598 | |
599 | #if defined(CONFIG_MODULES) && defined(MODULES_VADDR) |
600 | /* |
601 | * MODULES_VADDR has no intersection with VMALLOC_ADDR. |
602 | */ |
603 | struct kcore_list kcore_modules; |
604 | static void __init add_modules_range(void) |
605 | { |
606 | kclist_add(&kcore_modules, (void *)MODULES_VADDR, |
607 | MODULES_END - MODULES_VADDR, KCORE_VMALLOC); |
608 | } |
609 | #else |
610 | static void __init add_modules_range(void) |
611 | { |
612 | } |
613 | #endif |
614 | |
615 | static int __init proc_kcore_init(void) |
616 | { |
617 | proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, |
618 | &proc_kcore_operations); |
619 | if (!proc_root_kcore) { |
620 | printk(KERN_ERR "couldn't create /proc/kcore\n"); |
621 | return 0; /* Always returns 0. */ |
622 | } |
623 | /* Store text area if it's special */ |
624 | proc_kcore_text_init(); |
625 | /* Store vmalloc area */ |
626 | kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, |
627 | VMALLOC_END - VMALLOC_START, KCORE_VMALLOC); |
628 | add_modules_range(); |
629 | /* Store direct-map area from physical memory map */ |
630 | kcore_update_ram(); |
631 | hotplug_memory_notifier(kcore_callback, 0); |
632 | |
633 | return 0; |
634 | } |
635 | module_init(proc_kcore_init); |
636 |
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9