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1da177e4 LT |
1 | /* |
2 | * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Derived from sys_sparc32.c. | |
3 | * | |
4 | * Copyright (C) 2000 VA Linux Co | |
5 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> | |
6 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> | |
7 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
8 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
9 | * Copyright (C) 2000-2003, 2005 Hewlett-Packard Co | |
10 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
11 | * Copyright (C) 2004 Gordon Jin <gordon.jin@intel.com> | |
12 | * | |
13 | * These routines maintain argument size conversion between 32bit and 64bit | |
14 | * environment. | |
15 | */ | |
16 | ||
17 | #include <linux/config.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/sysctl.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/file.h> | |
24 | #include <linux/signal.h> | |
25 | #include <linux/resource.h> | |
26 | #include <linux/times.h> | |
27 | #include <linux/utsname.h> | |
28 | #include <linux/timex.h> | |
29 | #include <linux/smp.h> | |
30 | #include <linux/smp_lock.h> | |
31 | #include <linux/sem.h> | |
32 | #include <linux/msg.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/shm.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/uio.h> | |
37 | #include <linux/nfs_fs.h> | |
38 | #include <linux/quota.h> | |
dfb7dac3 | 39 | #include <linux/syscalls.h> |
1da177e4 LT |
40 | #include <linux/sunrpc/svc.h> |
41 | #include <linux/nfsd/nfsd.h> | |
42 | #include <linux/nfsd/cache.h> | |
43 | #include <linux/nfsd/xdr.h> | |
44 | #include <linux/nfsd/syscall.h> | |
45 | #include <linux/poll.h> | |
46 | #include <linux/eventpoll.h> | |
47 | #include <linux/personality.h> | |
48 | #include <linux/ptrace.h> | |
49 | #include <linux/stat.h> | |
50 | #include <linux/ipc.h> | |
a9415644 | 51 | #include <linux/capability.h> |
1da177e4 LT |
52 | #include <linux/compat.h> |
53 | #include <linux/vfs.h> | |
54 | #include <linux/mman.h> | |
92ff2ecd | 55 | #include <linux/mutex.h> |
1da177e4 LT |
56 | |
57 | #include <asm/intrinsics.h> | |
1da177e4 LT |
58 | #include <asm/types.h> |
59 | #include <asm/uaccess.h> | |
60 | #include <asm/unistd.h> | |
61 | ||
62 | #include "ia32priv.h" | |
63 | ||
64 | #include <net/scm.h> | |
65 | #include <net/sock.h> | |
66 | ||
67 | #define DEBUG 0 | |
68 | ||
69 | #if DEBUG | |
70 | # define DBG(fmt...) printk(KERN_DEBUG fmt) | |
71 | #else | |
72 | # define DBG(fmt...) | |
73 | #endif | |
74 | ||
75 | #define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1))) | |
76 | ||
77 | #define OFFSET4K(a) ((a) & 0xfff) | |
78 | #define PAGE_START(addr) ((addr) & PAGE_MASK) | |
79 | #define MINSIGSTKSZ_IA32 2048 | |
80 | ||
81 | #define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid)) | |
82 | #define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid)) | |
83 | ||
84 | /* | |
85 | * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore | |
86 | * while doing so. | |
87 | */ | |
88 | /* XXX make per-mm: */ | |
92ff2ecd | 89 | static DEFINE_MUTEX(ia32_mmap_mutex); |
1da177e4 LT |
90 | |
91 | asmlinkage long | |
92 | sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp, | |
93 | struct pt_regs *regs) | |
94 | { | |
95 | long error; | |
96 | char *filename; | |
97 | unsigned long old_map_base, old_task_size, tssd; | |
98 | ||
99 | filename = getname(name); | |
100 | error = PTR_ERR(filename); | |
101 | if (IS_ERR(filename)) | |
102 | return error; | |
103 | ||
104 | old_map_base = current->thread.map_base; | |
105 | old_task_size = current->thread.task_size; | |
106 | tssd = ia64_get_kr(IA64_KR_TSSD); | |
107 | ||
108 | /* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */ | |
109 | current->thread.map_base = DEFAULT_MAP_BASE; | |
110 | current->thread.task_size = DEFAULT_TASK_SIZE; | |
111 | ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob); | |
112 | ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1); | |
113 | ||
114 | error = compat_do_execve(filename, argv, envp, regs); | |
115 | putname(filename); | |
116 | ||
117 | if (error < 0) { | |
118 | /* oops, execve failed, switch back to old values... */ | |
119 | ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE); | |
120 | ia64_set_kr(IA64_KR_TSSD, tssd); | |
121 | current->thread.map_base = old_map_base; | |
122 | current->thread.task_size = old_task_size; | |
123 | } | |
124 | ||
125 | return error; | |
126 | } | |
127 | ||
128 | int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) | |
129 | { | |
130 | int err; | |
131 | ||
132 | if ((u64) stat->size > MAX_NON_LFS || | |
133 | !old_valid_dev(stat->dev) || | |
134 | !old_valid_dev(stat->rdev)) | |
135 | return -EOVERFLOW; | |
136 | ||
137 | if (clear_user(ubuf, sizeof(*ubuf))) | |
138 | return -EFAULT; | |
139 | ||
140 | err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); | |
141 | err |= __put_user(stat->ino, &ubuf->st_ino); | |
142 | err |= __put_user(stat->mode, &ubuf->st_mode); | |
143 | err |= __put_user(stat->nlink, &ubuf->st_nlink); | |
144 | err |= __put_user(high2lowuid(stat->uid), &ubuf->st_uid); | |
145 | err |= __put_user(high2lowgid(stat->gid), &ubuf->st_gid); | |
146 | err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); | |
147 | err |= __put_user(stat->size, &ubuf->st_size); | |
148 | err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); | |
149 | err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); | |
150 | err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); | |
151 | err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
152 | err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); | |
153 | err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
154 | err |= __put_user(stat->blksize, &ubuf->st_blksize); | |
155 | err |= __put_user(stat->blocks, &ubuf->st_blocks); | |
156 | return err; | |
157 | } | |
158 | ||
159 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
160 | ||
161 | ||
162 | static int | |
163 | get_page_prot (struct vm_area_struct *vma, unsigned long addr) | |
164 | { | |
165 | int prot = 0; | |
166 | ||
167 | if (!vma || vma->vm_start > addr) | |
168 | return 0; | |
169 | ||
170 | if (vma->vm_flags & VM_READ) | |
171 | prot |= PROT_READ; | |
172 | if (vma->vm_flags & VM_WRITE) | |
173 | prot |= PROT_WRITE; | |
174 | if (vma->vm_flags & VM_EXEC) | |
175 | prot |= PROT_EXEC; | |
176 | return prot; | |
177 | } | |
178 | ||
179 | /* | |
180 | * Map a subpage by creating an anonymous page that contains the union of the old page and | |
181 | * the subpage. | |
182 | */ | |
183 | static unsigned long | |
184 | mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags, | |
185 | loff_t off) | |
186 | { | |
187 | void *page = NULL; | |
188 | struct inode *inode; | |
189 | unsigned long ret = 0; | |
190 | struct vm_area_struct *vma = find_vma(current->mm, start); | |
191 | int old_prot = get_page_prot(vma, start); | |
192 | ||
193 | DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n", | |
194 | file, start, end, prot, flags, off); | |
195 | ||
196 | ||
197 | /* Optimize the case where the old mmap and the new mmap are both anonymous */ | |
198 | if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) { | |
199 | if (clear_user((void __user *) start, end - start)) { | |
200 | ret = -EFAULT; | |
201 | goto out; | |
202 | } | |
203 | goto skip_mmap; | |
204 | } | |
205 | ||
206 | page = (void *) get_zeroed_page(GFP_KERNEL); | |
207 | if (!page) | |
208 | return -ENOMEM; | |
209 | ||
210 | if (old_prot) | |
211 | copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE); | |
212 | ||
213 | down_write(¤t->mm->mmap_sem); | |
214 | { | |
215 | ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE, | |
216 | flags | MAP_FIXED | MAP_ANONYMOUS, 0); | |
217 | } | |
218 | up_write(¤t->mm->mmap_sem); | |
219 | ||
220 | if (IS_ERR((void *) ret)) | |
221 | goto out; | |
222 | ||
223 | if (old_prot) { | |
224 | /* copy back the old page contents. */ | |
225 | if (offset_in_page(start)) | |
226 | copy_to_user((void __user *) PAGE_START(start), page, | |
227 | offset_in_page(start)); | |
228 | if (offset_in_page(end)) | |
229 | copy_to_user((void __user *) end, page + offset_in_page(end), | |
230 | PAGE_SIZE - offset_in_page(end)); | |
231 | } | |
232 | ||
233 | if (!(flags & MAP_ANONYMOUS)) { | |
234 | /* read the file contents */ | |
235 | inode = file->f_dentry->d_inode; | |
236 | if (!inode->i_fop || !file->f_op->read | |
237 | || ((*file->f_op->read)(file, (char __user *) start, end - start, &off) < 0)) | |
238 | { | |
239 | ret = -EINVAL; | |
240 | goto out; | |
241 | } | |
242 | } | |
243 | ||
244 | skip_mmap: | |
245 | if (!(prot & PROT_WRITE)) | |
246 | ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot); | |
247 | out: | |
248 | if (page) | |
249 | free_page((unsigned long) page); | |
250 | return ret; | |
251 | } | |
252 | ||
253 | /* SLAB cache for partial_page structures */ | |
254 | kmem_cache_t *partial_page_cachep; | |
255 | ||
256 | /* | |
257 | * init partial_page_list. | |
258 | * return 0 means kmalloc fail. | |
259 | */ | |
260 | struct partial_page_list* | |
261 | ia32_init_pp_list(void) | |
262 | { | |
263 | struct partial_page_list *p; | |
264 | ||
265 | if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL) | |
266 | return p; | |
267 | p->pp_head = NULL; | |
268 | p->ppl_rb = RB_ROOT; | |
269 | p->pp_hint = NULL; | |
270 | atomic_set(&p->pp_count, 1); | |
271 | return p; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Search for the partial page with @start in partial page list @ppl. | |
276 | * If finds the partial page, return the found partial page. | |
277 | * Else, return 0 and provide @pprev, @rb_link, @rb_parent to | |
278 | * be used by later __ia32_insert_pp(). | |
279 | */ | |
280 | static struct partial_page * | |
281 | __ia32_find_pp(struct partial_page_list *ppl, unsigned int start, | |
282 | struct partial_page **pprev, struct rb_node ***rb_link, | |
283 | struct rb_node **rb_parent) | |
284 | { | |
285 | struct partial_page *pp; | |
286 | struct rb_node **__rb_link, *__rb_parent, *rb_prev; | |
287 | ||
288 | pp = ppl->pp_hint; | |
289 | if (pp && pp->base == start) | |
290 | return pp; | |
291 | ||
292 | __rb_link = &ppl->ppl_rb.rb_node; | |
293 | rb_prev = __rb_parent = NULL; | |
294 | ||
295 | while (*__rb_link) { | |
296 | __rb_parent = *__rb_link; | |
297 | pp = rb_entry(__rb_parent, struct partial_page, pp_rb); | |
298 | ||
299 | if (pp->base == start) { | |
300 | ppl->pp_hint = pp; | |
301 | return pp; | |
302 | } else if (pp->base < start) { | |
303 | rb_prev = __rb_parent; | |
304 | __rb_link = &__rb_parent->rb_right; | |
305 | } else { | |
306 | __rb_link = &__rb_parent->rb_left; | |
307 | } | |
308 | } | |
309 | ||
310 | *rb_link = __rb_link; | |
311 | *rb_parent = __rb_parent; | |
312 | *pprev = NULL; | |
313 | if (rb_prev) | |
314 | *pprev = rb_entry(rb_prev, struct partial_page, pp_rb); | |
315 | return NULL; | |
316 | } | |
317 | ||
318 | /* | |
319 | * insert @pp into @ppl. | |
320 | */ | |
321 | static void | |
322 | __ia32_insert_pp(struct partial_page_list *ppl, struct partial_page *pp, | |
323 | struct partial_page *prev, struct rb_node **rb_link, | |
324 | struct rb_node *rb_parent) | |
325 | { | |
326 | /* link list */ | |
327 | if (prev) { | |
328 | pp->next = prev->next; | |
329 | prev->next = pp; | |
330 | } else { | |
331 | ppl->pp_head = pp; | |
332 | if (rb_parent) | |
333 | pp->next = rb_entry(rb_parent, | |
334 | struct partial_page, pp_rb); | |
335 | else | |
336 | pp->next = NULL; | |
337 | } | |
338 | ||
339 | /* link rb */ | |
340 | rb_link_node(&pp->pp_rb, rb_parent, rb_link); | |
341 | rb_insert_color(&pp->pp_rb, &ppl->ppl_rb); | |
342 | ||
343 | ppl->pp_hint = pp; | |
344 | } | |
345 | ||
346 | /* | |
347 | * delete @pp from partial page list @ppl. | |
348 | */ | |
349 | static void | |
350 | __ia32_delete_pp(struct partial_page_list *ppl, struct partial_page *pp, | |
351 | struct partial_page *prev) | |
352 | { | |
353 | if (prev) { | |
354 | prev->next = pp->next; | |
355 | if (ppl->pp_hint == pp) | |
356 | ppl->pp_hint = prev; | |
357 | } else { | |
358 | ppl->pp_head = pp->next; | |
359 | if (ppl->pp_hint == pp) | |
360 | ppl->pp_hint = pp->next; | |
361 | } | |
362 | rb_erase(&pp->pp_rb, &ppl->ppl_rb); | |
363 | kmem_cache_free(partial_page_cachep, pp); | |
364 | } | |
365 | ||
366 | static struct partial_page * | |
367 | __pp_prev(struct partial_page *pp) | |
368 | { | |
369 | struct rb_node *prev = rb_prev(&pp->pp_rb); | |
370 | if (prev) | |
371 | return rb_entry(prev, struct partial_page, pp_rb); | |
372 | else | |
373 | return NULL; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Delete partial pages with address between @start and @end. | |
378 | * @start and @end are page aligned. | |
379 | */ | |
380 | static void | |
381 | __ia32_delete_pp_range(unsigned int start, unsigned int end) | |
382 | { | |
383 | struct partial_page *pp, *prev; | |
384 | struct rb_node **rb_link, *rb_parent; | |
385 | ||
386 | if (start >= end) | |
387 | return; | |
388 | ||
389 | pp = __ia32_find_pp(current->thread.ppl, start, &prev, | |
390 | &rb_link, &rb_parent); | |
391 | if (pp) | |
392 | prev = __pp_prev(pp); | |
393 | else { | |
394 | if (prev) | |
395 | pp = prev->next; | |
396 | else | |
397 | pp = current->thread.ppl->pp_head; | |
398 | } | |
399 | ||
400 | while (pp && pp->base < end) { | |
401 | struct partial_page *tmp = pp->next; | |
402 | __ia32_delete_pp(current->thread.ppl, pp, prev); | |
403 | pp = tmp; | |
404 | } | |
405 | } | |
406 | ||
407 | /* | |
408 | * Set the range between @start and @end in bitmap. | |
409 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
410 | */ | |
411 | static int | |
412 | __ia32_set_pp(unsigned int start, unsigned int end, int flags) | |
413 | { | |
414 | struct partial_page *pp, *prev; | |
415 | struct rb_node ** rb_link, *rb_parent; | |
416 | unsigned int pstart, start_bit, end_bit, i; | |
417 | ||
418 | pstart = PAGE_START(start); | |
419 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
420 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
421 | if (end_bit == 0) | |
422 | end_bit = PAGE_SIZE / IA32_PAGE_SIZE; | |
423 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
424 | &rb_link, &rb_parent); | |
425 | if (pp) { | |
426 | for (i = start_bit; i < end_bit; i++) | |
427 | set_bit(i, &pp->bitmap); | |
428 | /* | |
429 | * Check: if this partial page has been set to a full page, | |
430 | * then delete it. | |
431 | */ | |
432 | if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >= | |
433 | PAGE_SIZE/IA32_PAGE_SIZE) { | |
434 | __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp)); | |
435 | } | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* | |
440 | * MAP_FIXED may lead to overlapping mmap. | |
441 | * In this case, the requested mmap area may already mmaped as a full | |
442 | * page. So check vma before adding a new partial page. | |
443 | */ | |
444 | if (flags & MAP_FIXED) { | |
445 | struct vm_area_struct *vma = find_vma(current->mm, pstart); | |
446 | if (vma && vma->vm_start <= pstart) | |
447 | return 0; | |
448 | } | |
449 | ||
450 | /* new a partial_page */ | |
451 | pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL); | |
452 | if (!pp) | |
453 | return -ENOMEM; | |
454 | pp->base = pstart; | |
455 | pp->bitmap = 0; | |
456 | for (i=start_bit; i<end_bit; i++) | |
457 | set_bit(i, &(pp->bitmap)); | |
458 | pp->next = NULL; | |
459 | __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | /* | |
464 | * @start and @end should be IA32 page aligned, but don't need to be in the | |
465 | * same IA64 page. Split @start and @end to make sure they're in the same IA64 | |
466 | * page, then call __ia32_set_pp(). | |
467 | */ | |
468 | static void | |
469 | ia32_set_pp(unsigned int start, unsigned int end, int flags) | |
470 | { | |
471 | down_write(¤t->mm->mmap_sem); | |
472 | if (flags & MAP_FIXED) { | |
473 | /* | |
474 | * MAP_FIXED may lead to overlapping mmap. When this happens, | |
475 | * a series of complete IA64 pages results in deletion of | |
476 | * old partial pages in that range. | |
477 | */ | |
478 | __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end)); | |
479 | } | |
480 | ||
481 | if (end < PAGE_ALIGN(start)) { | |
482 | __ia32_set_pp(start, end, flags); | |
483 | } else { | |
484 | if (offset_in_page(start)) | |
485 | __ia32_set_pp(start, PAGE_ALIGN(start), flags); | |
486 | if (offset_in_page(end)) | |
487 | __ia32_set_pp(PAGE_START(end), end, flags); | |
488 | } | |
489 | up_write(¤t->mm->mmap_sem); | |
490 | } | |
491 | ||
492 | /* | |
493 | * Unset the range between @start and @end in bitmap. | |
494 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
495 | * After doing that, if the bitmap is 0, then free the page and return 1, | |
496 | * else return 0; | |
497 | * If not find the partial page in the list, then | |
498 | * If the vma exists, then the full page is set to a partial page; | |
499 | * Else return -ENOMEM. | |
500 | */ | |
501 | static int | |
502 | __ia32_unset_pp(unsigned int start, unsigned int end) | |
503 | { | |
504 | struct partial_page *pp, *prev; | |
505 | struct rb_node ** rb_link, *rb_parent; | |
506 | unsigned int pstart, start_bit, end_bit, i; | |
507 | struct vm_area_struct *vma; | |
508 | ||
509 | pstart = PAGE_START(start); | |
510 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
511 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
512 | if (end_bit == 0) | |
513 | end_bit = PAGE_SIZE / IA32_PAGE_SIZE; | |
514 | ||
515 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
516 | &rb_link, &rb_parent); | |
517 | if (pp) { | |
518 | for (i = start_bit; i < end_bit; i++) | |
519 | clear_bit(i, &pp->bitmap); | |
520 | if (pp->bitmap == 0) { | |
521 | __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp)); | |
522 | return 1; | |
523 | } | |
524 | return 0; | |
525 | } | |
526 | ||
527 | vma = find_vma(current->mm, pstart); | |
528 | if (!vma || vma->vm_start > pstart) { | |
529 | return -ENOMEM; | |
530 | } | |
531 | ||
532 | /* new a partial_page */ | |
533 | pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL); | |
534 | if (!pp) | |
535 | return -ENOMEM; | |
536 | pp->base = pstart; | |
537 | pp->bitmap = 0; | |
538 | for (i = 0; i < start_bit; i++) | |
539 | set_bit(i, &(pp->bitmap)); | |
540 | for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++) | |
541 | set_bit(i, &(pp->bitmap)); | |
542 | pp->next = NULL; | |
543 | __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Delete pp between PAGE_ALIGN(start) and PAGE_START(end) by calling | |
549 | * __ia32_delete_pp_range(). Unset possible partial pages by calling | |
550 | * __ia32_unset_pp(). | |
551 | * The returned value see __ia32_unset_pp(). | |
552 | */ | |
553 | static int | |
554 | ia32_unset_pp(unsigned int *startp, unsigned int *endp) | |
555 | { | |
556 | unsigned int start = *startp, end = *endp; | |
557 | int ret = 0; | |
558 | ||
559 | down_write(¤t->mm->mmap_sem); | |
560 | ||
561 | __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end)); | |
562 | ||
563 | if (end < PAGE_ALIGN(start)) { | |
564 | ret = __ia32_unset_pp(start, end); | |
565 | if (ret == 1) { | |
566 | *startp = PAGE_START(start); | |
567 | *endp = PAGE_ALIGN(end); | |
568 | } | |
569 | if (ret == 0) { | |
570 | /* to shortcut sys_munmap() in sys32_munmap() */ | |
571 | *startp = PAGE_START(start); | |
572 | *endp = PAGE_START(end); | |
573 | } | |
574 | } else { | |
575 | if (offset_in_page(start)) { | |
576 | ret = __ia32_unset_pp(start, PAGE_ALIGN(start)); | |
577 | if (ret == 1) | |
578 | *startp = PAGE_START(start); | |
579 | if (ret == 0) | |
580 | *startp = PAGE_ALIGN(start); | |
581 | if (ret < 0) | |
582 | goto out; | |
583 | } | |
584 | if (offset_in_page(end)) { | |
585 | ret = __ia32_unset_pp(PAGE_START(end), end); | |
586 | if (ret == 1) | |
587 | *endp = PAGE_ALIGN(end); | |
588 | if (ret == 0) | |
589 | *endp = PAGE_START(end); | |
590 | } | |
591 | } | |
592 | ||
593 | out: | |
594 | up_write(¤t->mm->mmap_sem); | |
595 | return ret; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Compare the range between @start and @end with bitmap in partial page. | |
600 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
601 | */ | |
602 | static int | |
603 | __ia32_compare_pp(unsigned int start, unsigned int end) | |
604 | { | |
605 | struct partial_page *pp, *prev; | |
606 | struct rb_node ** rb_link, *rb_parent; | |
607 | unsigned int pstart, start_bit, end_bit, size; | |
608 | unsigned int first_bit, next_zero_bit; /* the first range in bitmap */ | |
609 | ||
610 | pstart = PAGE_START(start); | |
611 | ||
612 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
613 | &rb_link, &rb_parent); | |
614 | if (!pp) | |
615 | return 1; | |
616 | ||
617 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
618 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
619 | size = sizeof(pp->bitmap) * 8; | |
620 | first_bit = find_first_bit(&pp->bitmap, size); | |
621 | next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit); | |
622 | if ((start_bit < first_bit) || (end_bit > next_zero_bit)) { | |
623 | /* exceeds the first range in bitmap */ | |
624 | return -ENOMEM; | |
625 | } else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) { | |
626 | first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit); | |
627 | if ((next_zero_bit < first_bit) && (first_bit < size)) | |
628 | return 1; /* has next range */ | |
629 | else | |
630 | return 0; /* no next range */ | |
631 | } else | |
632 | return 1; | |
633 | } | |
634 | ||
635 | /* | |
636 | * @start and @end should be IA32 page aligned, but don't need to be in the | |
637 | * same IA64 page. Split @start and @end to make sure they're in the same IA64 | |
638 | * page, then call __ia32_compare_pp(). | |
639 | * | |
640 | * Take this as example: the range is the 1st and 2nd 4K page. | |
641 | * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011; | |
642 | * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111; | |
643 | * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or | |
644 | * bitmap = 00000101. | |
645 | */ | |
646 | static int | |
647 | ia32_compare_pp(unsigned int *startp, unsigned int *endp) | |
648 | { | |
649 | unsigned int start = *startp, end = *endp; | |
650 | int retval = 0; | |
651 | ||
652 | down_write(¤t->mm->mmap_sem); | |
653 | ||
654 | if (end < PAGE_ALIGN(start)) { | |
655 | retval = __ia32_compare_pp(start, end); | |
656 | if (retval == 0) { | |
657 | *startp = PAGE_START(start); | |
658 | *endp = PAGE_ALIGN(end); | |
659 | } | |
660 | } else { | |
661 | if (offset_in_page(start)) { | |
662 | retval = __ia32_compare_pp(start, | |
663 | PAGE_ALIGN(start)); | |
664 | if (retval == 0) | |
665 | *startp = PAGE_START(start); | |
666 | if (retval < 0) | |
667 | goto out; | |
668 | } | |
669 | if (offset_in_page(end)) { | |
670 | retval = __ia32_compare_pp(PAGE_START(end), end); | |
671 | if (retval == 0) | |
672 | *endp = PAGE_ALIGN(end); | |
673 | } | |
674 | } | |
675 | ||
676 | out: | |
677 | up_write(¤t->mm->mmap_sem); | |
678 | return retval; | |
679 | } | |
680 | ||
681 | static void | |
682 | __ia32_drop_pp_list(struct partial_page_list *ppl) | |
683 | { | |
684 | struct partial_page *pp = ppl->pp_head; | |
685 | ||
686 | while (pp) { | |
687 | struct partial_page *next = pp->next; | |
688 | kmem_cache_free(partial_page_cachep, pp); | |
689 | pp = next; | |
690 | } | |
691 | ||
692 | kfree(ppl); | |
693 | } | |
694 | ||
695 | void | |
696 | ia32_drop_partial_page_list(struct task_struct *task) | |
697 | { | |
698 | struct partial_page_list* ppl = task->thread.ppl; | |
699 | ||
700 | if (ppl && atomic_dec_and_test(&ppl->pp_count)) | |
701 | __ia32_drop_pp_list(ppl); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Copy current->thread.ppl to ppl (already initialized). | |
706 | */ | |
707 | static int | |
708 | __ia32_copy_pp_list(struct partial_page_list *ppl) | |
709 | { | |
710 | struct partial_page *pp, *tmp, *prev; | |
711 | struct rb_node **rb_link, *rb_parent; | |
712 | ||
713 | ppl->pp_head = NULL; | |
714 | ppl->pp_hint = NULL; | |
715 | ppl->ppl_rb = RB_ROOT; | |
716 | rb_link = &ppl->ppl_rb.rb_node; | |
717 | rb_parent = NULL; | |
718 | prev = NULL; | |
719 | ||
720 | for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) { | |
721 | tmp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL); | |
722 | if (!tmp) | |
723 | return -ENOMEM; | |
724 | *tmp = *pp; | |
725 | __ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent); | |
726 | prev = tmp; | |
727 | rb_link = &tmp->pp_rb.rb_right; | |
728 | rb_parent = &tmp->pp_rb; | |
729 | } | |
730 | return 0; | |
731 | } | |
732 | ||
733 | int | |
734 | ia32_copy_partial_page_list(struct task_struct *p, unsigned long clone_flags) | |
735 | { | |
736 | int retval = 0; | |
737 | ||
738 | if (clone_flags & CLONE_VM) { | |
739 | atomic_inc(¤t->thread.ppl->pp_count); | |
740 | p->thread.ppl = current->thread.ppl; | |
741 | } else { | |
742 | p->thread.ppl = ia32_init_pp_list(); | |
743 | if (!p->thread.ppl) | |
744 | return -ENOMEM; | |
745 | down_write(¤t->mm->mmap_sem); | |
746 | { | |
747 | retval = __ia32_copy_pp_list(p->thread.ppl); | |
748 | } | |
749 | up_write(¤t->mm->mmap_sem); | |
750 | } | |
751 | ||
752 | return retval; | |
753 | } | |
754 | ||
755 | static unsigned long | |
756 | emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags, | |
757 | loff_t off) | |
758 | { | |
759 | unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0; | |
760 | struct inode *inode; | |
761 | loff_t poff; | |
762 | ||
763 | end = start + len; | |
764 | pstart = PAGE_START(start); | |
765 | pend = PAGE_ALIGN(end); | |
766 | ||
767 | if (flags & MAP_FIXED) { | |
768 | ia32_set_pp((unsigned int)start, (unsigned int)end, flags); | |
769 | if (start > pstart) { | |
770 | if (flags & MAP_SHARED) | |
771 | printk(KERN_INFO | |
772 | "%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n", | |
773 | current->comm, current->pid, start); | |
774 | ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags, | |
775 | off); | |
776 | if (IS_ERR((void *) ret)) | |
777 | return ret; | |
778 | pstart += PAGE_SIZE; | |
779 | if (pstart >= pend) | |
780 | goto out; /* done */ | |
781 | } | |
782 | if (end < pend) { | |
783 | if (flags & MAP_SHARED) | |
784 | printk(KERN_INFO | |
785 | "%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n", | |
786 | current->comm, current->pid, end); | |
787 | ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags, | |
788 | (off + len) - offset_in_page(end)); | |
789 | if (IS_ERR((void *) ret)) | |
790 | return ret; | |
791 | pend -= PAGE_SIZE; | |
792 | if (pstart >= pend) | |
793 | goto out; /* done */ | |
794 | } | |
795 | } else { | |
796 | /* | |
797 | * If a start address was specified, use it if the entire rounded out area | |
798 | * is available. | |
799 | */ | |
800 | if (start && !pstart) | |
801 | fudge = 1; /* handle case of mapping to range (0,PAGE_SIZE) */ | |
802 | tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags); | |
803 | if (tmp != pstart) { | |
804 | pstart = tmp; | |
805 | start = pstart + offset_in_page(off); /* make start congruent with off */ | |
806 | end = start + len; | |
807 | pend = PAGE_ALIGN(end); | |
808 | } | |
809 | } | |
810 | ||
811 | poff = off + (pstart - start); /* note: (pstart - start) may be negative */ | |
812 | is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0); | |
813 | ||
814 | if ((flags & MAP_SHARED) && !is_congruent) | |
815 | printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap " | |
816 | "(addr=0x%lx,off=0x%llx)\n", current->comm, current->pid, start, off); | |
817 | ||
818 | DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend, | |
819 | is_congruent ? "congruent" : "not congruent", poff); | |
820 | ||
821 | down_write(¤t->mm->mmap_sem); | |
822 | { | |
823 | if (!(flags & MAP_ANONYMOUS) && is_congruent) | |
824 | ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff); | |
825 | else | |
826 | ret = do_mmap(NULL, pstart, pend - pstart, | |
827 | prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE), | |
828 | flags | MAP_FIXED | MAP_ANONYMOUS, 0); | |
829 | } | |
830 | up_write(¤t->mm->mmap_sem); | |
831 | ||
832 | if (IS_ERR((void *) ret)) | |
833 | return ret; | |
834 | ||
835 | if (!is_congruent) { | |
836 | /* read the file contents */ | |
837 | inode = file->f_dentry->d_inode; | |
838 | if (!inode->i_fop || !file->f_op->read | |
839 | || ((*file->f_op->read)(file, (char __user *) pstart, pend - pstart, &poff) | |
840 | < 0)) | |
841 | { | |
842 | sys_munmap(pstart, pend - pstart); | |
843 | return -EINVAL; | |
844 | } | |
845 | if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0) | |
846 | return -EINVAL; | |
847 | } | |
848 | ||
849 | if (!(flags & MAP_FIXED)) | |
850 | ia32_set_pp((unsigned int)start, (unsigned int)end, flags); | |
851 | out: | |
852 | return start; | |
853 | } | |
854 | ||
855 | #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */ | |
856 | ||
857 | static inline unsigned int | |
858 | get_prot32 (unsigned int prot) | |
859 | { | |
860 | if (prot & PROT_WRITE) | |
861 | /* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */ | |
862 | prot |= PROT_READ | PROT_WRITE | PROT_EXEC; | |
863 | else if (prot & (PROT_READ | PROT_EXEC)) | |
864 | /* on x86, there is no distinction between PROT_READ and PROT_EXEC */ | |
865 | prot |= (PROT_READ | PROT_EXEC); | |
866 | ||
867 | return prot; | |
868 | } | |
869 | ||
870 | unsigned long | |
871 | ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags, | |
872 | loff_t offset) | |
873 | { | |
874 | DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n", | |
875 | file, addr, len, prot, flags, offset); | |
876 | ||
877 | if (file && (!file->f_op || !file->f_op->mmap)) | |
878 | return -ENODEV; | |
879 | ||
880 | len = IA32_PAGE_ALIGN(len); | |
881 | if (len == 0) | |
882 | return addr; | |
883 | ||
884 | if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len) | |
885 | { | |
886 | if (flags & MAP_FIXED) | |
887 | return -ENOMEM; | |
888 | else | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | if (OFFSET4K(offset)) | |
893 | return -EINVAL; | |
894 | ||
895 | prot = get_prot32(prot); | |
896 | ||
897 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
92ff2ecd | 898 | mutex_lock(&ia32_mmap_mutex); |
1da177e4 LT |
899 | { |
900 | addr = emulate_mmap(file, addr, len, prot, flags, offset); | |
901 | } | |
92ff2ecd | 902 | mutex_unlock(&ia32_mmap_mutex); |
1da177e4 LT |
903 | #else |
904 | down_write(¤t->mm->mmap_sem); | |
905 | { | |
906 | addr = do_mmap(file, addr, len, prot, flags, offset); | |
907 | } | |
908 | up_write(¤t->mm->mmap_sem); | |
909 | #endif | |
910 | DBG("ia32_do_mmap: returning 0x%lx\n", addr); | |
911 | return addr; | |
912 | } | |
913 | ||
914 | /* | |
915 | * Linux/i386 didn't use to be able to handle more than 4 system call parameters, so these | |
916 | * system calls used a memory block for parameter passing.. | |
917 | */ | |
918 | ||
919 | struct mmap_arg_struct { | |
920 | unsigned int addr; | |
921 | unsigned int len; | |
922 | unsigned int prot; | |
923 | unsigned int flags; | |
924 | unsigned int fd; | |
925 | unsigned int offset; | |
926 | }; | |
927 | ||
928 | asmlinkage long | |
929 | sys32_mmap (struct mmap_arg_struct __user *arg) | |
930 | { | |
931 | struct mmap_arg_struct a; | |
932 | struct file *file = NULL; | |
933 | unsigned long addr; | |
934 | int flags; | |
935 | ||
936 | if (copy_from_user(&a, arg, sizeof(a))) | |
937 | return -EFAULT; | |
938 | ||
939 | if (OFFSET4K(a.offset)) | |
940 | return -EINVAL; | |
941 | ||
942 | flags = a.flags; | |
943 | ||
944 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
945 | if (!(flags & MAP_ANONYMOUS)) { | |
946 | file = fget(a.fd); | |
947 | if (!file) | |
948 | return -EBADF; | |
949 | } | |
950 | ||
951 | addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset); | |
952 | ||
953 | if (file) | |
954 | fput(file); | |
955 | return addr; | |
956 | } | |
957 | ||
958 | asmlinkage long | |
959 | sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags, | |
960 | unsigned int fd, unsigned int pgoff) | |
961 | { | |
962 | struct file *file = NULL; | |
963 | unsigned long retval; | |
964 | ||
965 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
966 | if (!(flags & MAP_ANONYMOUS)) { | |
967 | file = fget(fd); | |
968 | if (!file) | |
969 | return -EBADF; | |
970 | } | |
971 | ||
972 | retval = ia32_do_mmap(file, addr, len, prot, flags, | |
973 | (unsigned long) pgoff << IA32_PAGE_SHIFT); | |
974 | ||
975 | if (file) | |
976 | fput(file); | |
977 | return retval; | |
978 | } | |
979 | ||
980 | asmlinkage long | |
981 | sys32_munmap (unsigned int start, unsigned int len) | |
982 | { | |
983 | unsigned int end = start + len; | |
984 | long ret; | |
985 | ||
986 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
987 | ret = sys_munmap(start, end - start); | |
988 | #else | |
989 | if (OFFSET4K(start)) | |
990 | return -EINVAL; | |
991 | ||
992 | end = IA32_PAGE_ALIGN(end); | |
993 | if (start >= end) | |
994 | return -EINVAL; | |
995 | ||
996 | ret = ia32_unset_pp(&start, &end); | |
997 | if (ret < 0) | |
998 | return ret; | |
999 | ||
1000 | if (start >= end) | |
1001 | return 0; | |
1002 | ||
92ff2ecd JS |
1003 | mutex_lock(&ia32_mmap_mutex); |
1004 | ret = sys_munmap(start, end - start); | |
1005 | mutex_unlock(&ia32_mmap_mutex); | |
1da177e4 LT |
1006 | #endif |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
1011 | ||
1012 | /* | |
1013 | * When mprotect()ing a partial page, we set the permission to the union of the old | |
1014 | * settings and the new settings. In other words, it's only possible to make access to a | |
1015 | * partial page less restrictive. | |
1016 | */ | |
1017 | static long | |
1018 | mprotect_subpage (unsigned long address, int new_prot) | |
1019 | { | |
1020 | int old_prot; | |
1021 | struct vm_area_struct *vma; | |
1022 | ||
1023 | if (new_prot == PROT_NONE) | |
1024 | return 0; /* optimize case where nothing changes... */ | |
1025 | vma = find_vma(current->mm, address); | |
1026 | old_prot = get_page_prot(vma, address); | |
1027 | return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot); | |
1028 | } | |
1029 | ||
1030 | #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */ | |
1031 | ||
1032 | asmlinkage long | |
1033 | sys32_mprotect (unsigned int start, unsigned int len, int prot) | |
1034 | { | |
1035 | unsigned int end = start + len; | |
1036 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
1037 | long retval = 0; | |
1038 | #endif | |
1039 | ||
1040 | prot = get_prot32(prot); | |
1041 | ||
1042 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
1043 | return sys_mprotect(start, end - start, prot); | |
1044 | #else | |
1045 | if (OFFSET4K(start)) | |
1046 | return -EINVAL; | |
1047 | ||
1048 | end = IA32_PAGE_ALIGN(end); | |
1049 | if (end < start) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | retval = ia32_compare_pp(&start, &end); | |
1053 | ||
1054 | if (retval < 0) | |
1055 | return retval; | |
1056 | ||
92ff2ecd | 1057 | mutex_lock(&ia32_mmap_mutex); |
1da177e4 LT |
1058 | { |
1059 | if (offset_in_page(start)) { | |
1060 | /* start address is 4KB aligned but not page aligned. */ | |
1061 | retval = mprotect_subpage(PAGE_START(start), prot); | |
1062 | if (retval < 0) | |
1063 | goto out; | |
1064 | ||
1065 | start = PAGE_ALIGN(start); | |
1066 | if (start >= end) | |
1067 | goto out; /* retval is already zero... */ | |
1068 | } | |
1069 | ||
1070 | if (offset_in_page(end)) { | |
1071 | /* end address is 4KB aligned but not page aligned. */ | |
1072 | retval = mprotect_subpage(PAGE_START(end), prot); | |
1073 | if (retval < 0) | |
1074 | goto out; | |
1075 | ||
1076 | end = PAGE_START(end); | |
1077 | } | |
1078 | retval = sys_mprotect(start, end - start, prot); | |
1079 | } | |
1080 | out: | |
92ff2ecd | 1081 | mutex_unlock(&ia32_mmap_mutex); |
1da177e4 LT |
1082 | return retval; |
1083 | #endif | |
1084 | } | |
1085 | ||
1086 | asmlinkage long | |
1087 | sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len, | |
1088 | unsigned int flags, unsigned int new_addr) | |
1089 | { | |
1090 | long ret; | |
1091 | ||
1092 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
1093 | ret = sys_mremap(addr, old_len, new_len, flags, new_addr); | |
1094 | #else | |
1095 | unsigned int old_end, new_end; | |
1096 | ||
1097 | if (OFFSET4K(addr)) | |
1098 | return -EINVAL; | |
1099 | ||
1100 | old_len = IA32_PAGE_ALIGN(old_len); | |
1101 | new_len = IA32_PAGE_ALIGN(new_len); | |
1102 | old_end = addr + old_len; | |
1103 | new_end = addr + new_len; | |
1104 | ||
1105 | if (!new_len) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr))) | |
1109 | return -EINVAL; | |
1110 | ||
1111 | if (old_len >= new_len) { | |
1112 | ret = sys32_munmap(addr + new_len, old_len - new_len); | |
1113 | if (ret && old_len != new_len) | |
1114 | return ret; | |
1115 | ret = addr; | |
1116 | if (!(flags & MREMAP_FIXED) || (new_addr == addr)) | |
1117 | return ret; | |
1118 | old_len = new_len; | |
1119 | } | |
1120 | ||
1121 | addr = PAGE_START(addr); | |
1122 | old_len = PAGE_ALIGN(old_end) - addr; | |
1123 | new_len = PAGE_ALIGN(new_end) - addr; | |
1124 | ||
92ff2ecd JS |
1125 | mutex_lock(&ia32_mmap_mutex); |
1126 | ret = sys_mremap(addr, old_len, new_len, flags, new_addr); | |
1127 | mutex_unlock(&ia32_mmap_mutex); | |
1da177e4 LT |
1128 | |
1129 | if ((ret >= 0) && (old_len < new_len)) { | |
1130 | /* mremap expanded successfully */ | |
1131 | ia32_set_pp(old_end, new_end, flags); | |
1132 | } | |
1133 | #endif | |
1134 | return ret; | |
1135 | } | |
1136 | ||
1137 | asmlinkage long | |
1138 | sys32_pipe (int __user *fd) | |
1139 | { | |
1140 | int retval; | |
1141 | int fds[2]; | |
1142 | ||
1143 | retval = do_pipe(fds); | |
1144 | if (retval) | |
1145 | goto out; | |
1146 | if (copy_to_user(fd, fds, sizeof(fds))) | |
1147 | retval = -EFAULT; | |
1148 | out: | |
1149 | return retval; | |
1150 | } | |
1151 | ||
1152 | static inline long | |
1153 | get_tv32 (struct timeval *o, struct compat_timeval __user *i) | |
1154 | { | |
1155 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
1156 | (__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec))); | |
1157 | } | |
1158 | ||
1159 | static inline long | |
1160 | put_tv32 (struct compat_timeval __user *o, struct timeval *i) | |
1161 | { | |
1162 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
1163 | (__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec))); | |
1164 | } | |
1165 | ||
1166 | asmlinkage unsigned long | |
1167 | sys32_alarm (unsigned int seconds) | |
1168 | { | |
c08b8a49 | 1169 | return alarm_setitimer(seconds); |
1da177e4 LT |
1170 | } |
1171 | ||
1172 | /* Translations due to time_t size differences. Which affects all | |
1173 | sorts of things, like timeval and itimerval. */ | |
1174 | ||
1175 | extern struct timezone sys_tz; | |
1176 | ||
1177 | asmlinkage long | |
1178 | sys32_gettimeofday (struct compat_timeval __user *tv, struct timezone __user *tz) | |
1179 | { | |
1180 | if (tv) { | |
1181 | struct timeval ktv; | |
1182 | do_gettimeofday(&ktv); | |
1183 | if (put_tv32(tv, &ktv)) | |
1184 | return -EFAULT; | |
1185 | } | |
1186 | if (tz) { | |
1187 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
1188 | return -EFAULT; | |
1189 | } | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | asmlinkage long | |
1194 | sys32_settimeofday (struct compat_timeval __user *tv, struct timezone __user *tz) | |
1195 | { | |
1196 | struct timeval ktv; | |
1197 | struct timespec kts; | |
1198 | struct timezone ktz; | |
1199 | ||
1200 | if (tv) { | |
1201 | if (get_tv32(&ktv, tv)) | |
1202 | return -EFAULT; | |
1203 | kts.tv_sec = ktv.tv_sec; | |
1204 | kts.tv_nsec = ktv.tv_usec * 1000; | |
1205 | } | |
1206 | if (tz) { | |
1207 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
1208 | return -EFAULT; | |
1209 | } | |
1210 | ||
1211 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
1212 | } | |
1213 | ||
1214 | struct getdents32_callback { | |
1215 | struct compat_dirent __user *current_dir; | |
1216 | struct compat_dirent __user *previous; | |
1217 | int count; | |
1218 | int error; | |
1219 | }; | |
1220 | ||
1221 | struct readdir32_callback { | |
1222 | struct old_linux32_dirent __user * dirent; | |
1223 | int count; | |
1224 | }; | |
1225 | ||
1226 | static int | |
1227 | filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino, | |
1228 | unsigned int d_type) | |
1229 | { | |
1230 | struct compat_dirent __user * dirent; | |
1231 | struct getdents32_callback * buf = (struct getdents32_callback *) __buf; | |
1232 | int reclen = ROUND_UP(offsetof(struct compat_dirent, d_name) + namlen + 1, 4); | |
1233 | ||
1234 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1235 | if (reclen > buf->count) | |
1236 | return -EINVAL; | |
1237 | buf->error = -EFAULT; /* only used if we fail.. */ | |
1238 | dirent = buf->previous; | |
1239 | if (dirent) | |
1240 | if (put_user(offset, &dirent->d_off)) | |
1241 | return -EFAULT; | |
1242 | dirent = buf->current_dir; | |
1243 | buf->previous = dirent; | |
1244 | if (put_user(ino, &dirent->d_ino) | |
1245 | || put_user(reclen, &dirent->d_reclen) | |
1246 | || copy_to_user(dirent->d_name, name, namlen) | |
1247 | || put_user(0, dirent->d_name + namlen)) | |
1248 | return -EFAULT; | |
1249 | dirent = (struct compat_dirent __user *) ((char __user *) dirent + reclen); | |
1250 | buf->current_dir = dirent; | |
1251 | buf->count -= reclen; | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | asmlinkage long | |
1256 | sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned int count) | |
1257 | { | |
1258 | struct file * file; | |
1259 | struct compat_dirent __user * lastdirent; | |
1260 | struct getdents32_callback buf; | |
1261 | int error; | |
1262 | ||
1263 | error = -EBADF; | |
1264 | file = fget(fd); | |
1265 | if (!file) | |
1266 | goto out; | |
1267 | ||
1268 | buf.current_dir = dirent; | |
1269 | buf.previous = NULL; | |
1270 | buf.count = count; | |
1271 | buf.error = 0; | |
1272 | ||
1273 | error = vfs_readdir(file, filldir32, &buf); | |
1274 | if (error < 0) | |
1275 | goto out_putf; | |
1276 | error = buf.error; | |
1277 | lastdirent = buf.previous; | |
1278 | if (lastdirent) { | |
1279 | error = -EINVAL; | |
1280 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1281 | goto out_putf; | |
1282 | error = count - buf.count; | |
1283 | } | |
1284 | ||
1285 | out_putf: | |
1286 | fput(file); | |
1287 | out: | |
1288 | return error; | |
1289 | } | |
1290 | ||
1291 | static int | |
1292 | fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino, | |
1293 | unsigned int d_type) | |
1294 | { | |
1295 | struct readdir32_callback * buf = (struct readdir32_callback *) __buf; | |
1296 | struct old_linux32_dirent __user * dirent; | |
1297 | ||
1298 | if (buf->count) | |
1299 | return -EINVAL; | |
1300 | buf->count++; | |
1301 | dirent = buf->dirent; | |
1302 | if (put_user(ino, &dirent->d_ino) | |
1303 | || put_user(offset, &dirent->d_offset) | |
1304 | || put_user(namlen, &dirent->d_namlen) | |
1305 | || copy_to_user(dirent->d_name, name, namlen) | |
1306 | || put_user(0, dirent->d_name + namlen)) | |
1307 | return -EFAULT; | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | asmlinkage long | |
1312 | sys32_readdir (unsigned int fd, void __user *dirent, unsigned int count) | |
1313 | { | |
1314 | int error; | |
1315 | struct file * file; | |
1316 | struct readdir32_callback buf; | |
1317 | ||
1318 | error = -EBADF; | |
1319 | file = fget(fd); | |
1320 | if (!file) | |
1321 | goto out; | |
1322 | ||
1323 | buf.count = 0; | |
1324 | buf.dirent = dirent; | |
1325 | ||
1326 | error = vfs_readdir(file, fillonedir32, &buf); | |
1327 | if (error >= 0) | |
1328 | error = buf.count; | |
1329 | fput(file); | |
1330 | out: | |
1331 | return error; | |
1332 | } | |
1333 | ||
1334 | struct sel_arg_struct { | |
1335 | unsigned int n; | |
1336 | unsigned int inp; | |
1337 | unsigned int outp; | |
1338 | unsigned int exp; | |
1339 | unsigned int tvp; | |
1340 | }; | |
1341 | ||
1342 | asmlinkage long | |
1343 | sys32_old_select (struct sel_arg_struct __user *arg) | |
1344 | { | |
1345 | struct sel_arg_struct a; | |
1346 | ||
1347 | if (copy_from_user(&a, arg, sizeof(a))) | |
1348 | return -EFAULT; | |
1349 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
1350 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
1351 | } | |
1352 | ||
1353 | #define SEMOP 1 | |
1354 | #define SEMGET 2 | |
1355 | #define SEMCTL 3 | |
1356 | #define SEMTIMEDOP 4 | |
1357 | #define MSGSND 11 | |
1358 | #define MSGRCV 12 | |
1359 | #define MSGGET 13 | |
1360 | #define MSGCTL 14 | |
1361 | #define SHMAT 21 | |
1362 | #define SHMDT 22 | |
1363 | #define SHMGET 23 | |
1364 | #define SHMCTL 24 | |
1365 | ||
1366 | asmlinkage long | |
1367 | sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth) | |
1368 | { | |
1369 | int version; | |
1370 | ||
1371 | version = call >> 16; /* hack for backward compatibility */ | |
1372 | call &= 0xffff; | |
1373 | ||
1374 | switch (call) { | |
1375 | case SEMTIMEDOP: | |
1376 | if (fifth) | |
1377 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
1378 | second, compat_ptr(fifth)); | |
1379 | /* else fall through for normal semop() */ | |
1380 | case SEMOP: | |
1381 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
1382 | return sys_semtimedop(first, compat_ptr(ptr), second, | |
1383 | NULL); | |
1384 | case SEMGET: | |
1385 | return sys_semget(first, second, third); | |
1386 | case SEMCTL: | |
1387 | return compat_sys_semctl(first, second, third, compat_ptr(ptr)); | |
1388 | ||
1389 | case MSGSND: | |
1390 | return compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); | |
1391 | case MSGRCV: | |
1392 | return compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr)); | |
1393 | case MSGGET: | |
1394 | return sys_msgget((key_t) first, second); | |
1395 | case MSGCTL: | |
1396 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
1397 | ||
1398 | case SHMAT: | |
1399 | return compat_sys_shmat(first, second, third, version, compat_ptr(ptr)); | |
1400 | break; | |
1401 | case SHMDT: | |
1402 | return sys_shmdt(compat_ptr(ptr)); | |
1403 | case SHMGET: | |
1404 | return sys_shmget(first, (unsigned)second, third); | |
1405 | case SHMCTL: | |
1406 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
1407 | ||
1408 | default: | |
1409 | return -ENOSYS; | |
1410 | } | |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
1414 | asmlinkage long | |
1415 | compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options, | |
1416 | struct compat_rusage *ru); | |
1417 | ||
1418 | asmlinkage long | |
1419 | sys32_waitpid (int pid, unsigned int *stat_addr, int options) | |
1420 | { | |
1421 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
1422 | } | |
1423 | ||
1424 | static unsigned int | |
1425 | ia32_peek (struct task_struct *child, unsigned long addr, unsigned int *val) | |
1426 | { | |
1427 | size_t copied; | |
1428 | unsigned int ret; | |
1429 | ||
1430 | copied = access_process_vm(child, addr, val, sizeof(*val), 0); | |
1431 | return (copied != sizeof(ret)) ? -EIO : 0; | |
1432 | } | |
1433 | ||
1434 | static unsigned int | |
1435 | ia32_poke (struct task_struct *child, unsigned long addr, unsigned int val) | |
1436 | { | |
1437 | ||
1438 | if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val)) | |
1439 | return -EIO; | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * The order in which registers are stored in the ptrace regs structure | |
1445 | */ | |
1446 | #define PT_EBX 0 | |
1447 | #define PT_ECX 1 | |
1448 | #define PT_EDX 2 | |
1449 | #define PT_ESI 3 | |
1450 | #define PT_EDI 4 | |
1451 | #define PT_EBP 5 | |
1452 | #define PT_EAX 6 | |
1453 | #define PT_DS 7 | |
1454 | #define PT_ES 8 | |
1455 | #define PT_FS 9 | |
1456 | #define PT_GS 10 | |
1457 | #define PT_ORIG_EAX 11 | |
1458 | #define PT_EIP 12 | |
1459 | #define PT_CS 13 | |
1460 | #define PT_EFL 14 | |
1461 | #define PT_UESP 15 | |
1462 | #define PT_SS 16 | |
1463 | ||
1464 | static unsigned int | |
1465 | getreg (struct task_struct *child, int regno) | |
1466 | { | |
1467 | struct pt_regs *child_regs; | |
1468 | ||
6450578f | 1469 | child_regs = task_pt_regs(child); |
1da177e4 LT |
1470 | switch (regno / sizeof(int)) { |
1471 | case PT_EBX: return child_regs->r11; | |
1472 | case PT_ECX: return child_regs->r9; | |
1473 | case PT_EDX: return child_regs->r10; | |
1474 | case PT_ESI: return child_regs->r14; | |
1475 | case PT_EDI: return child_regs->r15; | |
1476 | case PT_EBP: return child_regs->r13; | |
1477 | case PT_EAX: return child_regs->r8; | |
1478 | case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */ | |
1479 | case PT_EIP: return child_regs->cr_iip; | |
1480 | case PT_UESP: return child_regs->r12; | |
1481 | case PT_EFL: return child->thread.eflag; | |
1482 | case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS: | |
1483 | return __USER_DS; | |
1484 | case PT_CS: return __USER_CS; | |
1485 | default: | |
1486 | printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno); | |
1487 | break; | |
1488 | } | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static void | |
1493 | putreg (struct task_struct *child, int regno, unsigned int value) | |
1494 | { | |
1495 | struct pt_regs *child_regs; | |
1496 | ||
6450578f | 1497 | child_regs = task_pt_regs(child); |
1da177e4 LT |
1498 | switch (regno / sizeof(int)) { |
1499 | case PT_EBX: child_regs->r11 = value; break; | |
1500 | case PT_ECX: child_regs->r9 = value; break; | |
1501 | case PT_EDX: child_regs->r10 = value; break; | |
1502 | case PT_ESI: child_regs->r14 = value; break; | |
1503 | case PT_EDI: child_regs->r15 = value; break; | |
1504 | case PT_EBP: child_regs->r13 = value; break; | |
1505 | case PT_EAX: child_regs->r8 = value; break; | |
1506 | case PT_ORIG_EAX: child_regs->r1 = value; break; | |
1507 | case PT_EIP: child_regs->cr_iip = value; break; | |
1508 | case PT_UESP: child_regs->r12 = value; break; | |
1509 | case PT_EFL: child->thread.eflag = value; break; | |
1510 | case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS: | |
1511 | if (value != __USER_DS) | |
1512 | printk(KERN_ERR | |
1513 | "ia32.putreg: attempt to set invalid segment register %d = %x\n", | |
1514 | regno, value); | |
1515 | break; | |
1516 | case PT_CS: | |
1517 | if (value != __USER_CS) | |
1518 | printk(KERN_ERR | |
1519 | "ia32.putreg: attempt to to set invalid segment register %d = %x\n", | |
1520 | regno, value); | |
1521 | break; | |
1522 | default: | |
1523 | printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno); | |
1524 | break; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | static void | |
1529 | put_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp, | |
1530 | struct switch_stack *swp, int tos) | |
1531 | { | |
1532 | struct _fpreg_ia32 *f; | |
1533 | char buf[32]; | |
1534 | ||
1535 | f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15); | |
1536 | if ((regno += tos) >= 8) | |
1537 | regno -= 8; | |
1538 | switch (regno) { | |
1539 | case 0: | |
1540 | ia64f2ia32f(f, &ptp->f8); | |
1541 | break; | |
1542 | case 1: | |
1543 | ia64f2ia32f(f, &ptp->f9); | |
1544 | break; | |
1545 | case 2: | |
1546 | ia64f2ia32f(f, &ptp->f10); | |
1547 | break; | |
1548 | case 3: | |
1549 | ia64f2ia32f(f, &ptp->f11); | |
1550 | break; | |
1551 | case 4: | |
1552 | case 5: | |
1553 | case 6: | |
1554 | case 7: | |
1555 | ia64f2ia32f(f, &swp->f12 + (regno - 4)); | |
1556 | break; | |
1557 | } | |
1558 | copy_to_user(reg, f, sizeof(*reg)); | |
1559 | } | |
1560 | ||
1561 | static void | |
1562 | get_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp, | |
1563 | struct switch_stack *swp, int tos) | |
1564 | { | |
1565 | ||
1566 | if ((regno += tos) >= 8) | |
1567 | regno -= 8; | |
1568 | switch (regno) { | |
1569 | case 0: | |
1570 | copy_from_user(&ptp->f8, reg, sizeof(*reg)); | |
1571 | break; | |
1572 | case 1: | |
1573 | copy_from_user(&ptp->f9, reg, sizeof(*reg)); | |
1574 | break; | |
1575 | case 2: | |
1576 | copy_from_user(&ptp->f10, reg, sizeof(*reg)); | |
1577 | break; | |
1578 | case 3: | |
1579 | copy_from_user(&ptp->f11, reg, sizeof(*reg)); | |
1580 | break; | |
1581 | case 4: | |
1582 | case 5: | |
1583 | case 6: | |
1584 | case 7: | |
1585 | copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg)); | |
1586 | break; | |
1587 | } | |
1588 | return; | |
1589 | } | |
1590 | ||
1591 | int | |
1592 | save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save) | |
1593 | { | |
1594 | struct switch_stack *swp; | |
1595 | struct pt_regs *ptp; | |
1596 | int i, tos; | |
1597 | ||
1598 | if (!access_ok(VERIFY_WRITE, save, sizeof(*save))) | |
1599 | return -EFAULT; | |
1600 | ||
1601 | __put_user(tsk->thread.fcr & 0xffff, &save->cwd); | |
1602 | __put_user(tsk->thread.fsr & 0xffff, &save->swd); | |
1603 | __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd); | |
1604 | __put_user(tsk->thread.fir, &save->fip); | |
1605 | __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs); | |
1606 | __put_user(tsk->thread.fdr, &save->foo); | |
1607 | __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos); | |
1608 | ||
1609 | /* | |
1610 | * Stack frames start with 16-bytes of temp space | |
1611 | */ | |
1612 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1613 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1614 | tos = (tsk->thread.fsr >> 11) & 7; |
1615 | for (i = 0; i < 8; i++) | |
1616 | put_fpreg(i, &save->st_space[i], ptp, swp, tos); | |
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | static int | |
1621 | restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save) | |
1622 | { | |
1623 | struct switch_stack *swp; | |
1624 | struct pt_regs *ptp; | |
1625 | int i, tos; | |
1626 | unsigned int fsrlo, fsrhi, num32; | |
1627 | ||
1628 | if (!access_ok(VERIFY_READ, save, sizeof(*save))) | |
1629 | return(-EFAULT); | |
1630 | ||
1631 | __get_user(num32, (unsigned int __user *)&save->cwd); | |
1632 | tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f); | |
1633 | __get_user(fsrlo, (unsigned int __user *)&save->swd); | |
1634 | __get_user(fsrhi, (unsigned int __user *)&save->twd); | |
1635 | num32 = (fsrhi << 16) | fsrlo; | |
1636 | tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32; | |
1637 | __get_user(num32, (unsigned int __user *)&save->fip); | |
1638 | tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32; | |
1639 | __get_user(num32, (unsigned int __user *)&save->foo); | |
1640 | tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32; | |
1641 | ||
1642 | /* | |
1643 | * Stack frames start with 16-bytes of temp space | |
1644 | */ | |
1645 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1646 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1647 | tos = (tsk->thread.fsr >> 11) & 7; |
1648 | for (i = 0; i < 8; i++) | |
1649 | get_fpreg(i, &save->st_space[i], ptp, swp, tos); | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | int | |
1654 | save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save) | |
1655 | { | |
1656 | struct switch_stack *swp; | |
1657 | struct pt_regs *ptp; | |
1658 | int i, tos; | |
1659 | unsigned long mxcsr=0; | |
1660 | unsigned long num128[2]; | |
1661 | ||
1662 | if (!access_ok(VERIFY_WRITE, save, sizeof(*save))) | |
1663 | return -EFAULT; | |
1664 | ||
1665 | __put_user(tsk->thread.fcr & 0xffff, &save->cwd); | |
1666 | __put_user(tsk->thread.fsr & 0xffff, &save->swd); | |
1667 | __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd); | |
1668 | __put_user(tsk->thread.fir, &save->fip); | |
1669 | __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs); | |
1670 | __put_user(tsk->thread.fdr, &save->foo); | |
1671 | __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos); | |
1672 | ||
1673 | /* | |
1674 | * Stack frames start with 16-bytes of temp space | |
1675 | */ | |
1676 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1677 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1678 | tos = (tsk->thread.fsr >> 11) & 7; |
1679 | for (i = 0; i < 8; i++) | |
1680 | put_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos); | |
1681 | ||
1682 | mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f); | |
1683 | __put_user(mxcsr & 0xffff, &save->mxcsr); | |
1684 | for (i = 0; i < 8; i++) { | |
1685 | memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long)); | |
1686 | memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long)); | |
1687 | copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32)); | |
1688 | } | |
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | static int | |
1693 | restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save) | |
1694 | { | |
1695 | struct switch_stack *swp; | |
1696 | struct pt_regs *ptp; | |
1697 | int i, tos; | |
1698 | unsigned int fsrlo, fsrhi, num32; | |
1699 | int mxcsr; | |
1700 | unsigned long num64; | |
1701 | unsigned long num128[2]; | |
1702 | ||
1703 | if (!access_ok(VERIFY_READ, save, sizeof(*save))) | |
1704 | return(-EFAULT); | |
1705 | ||
1706 | __get_user(num32, (unsigned int __user *)&save->cwd); | |
1707 | tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f); | |
1708 | __get_user(fsrlo, (unsigned int __user *)&save->swd); | |
1709 | __get_user(fsrhi, (unsigned int __user *)&save->twd); | |
1710 | num32 = (fsrhi << 16) | fsrlo; | |
1711 | tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32; | |
1712 | __get_user(num32, (unsigned int __user *)&save->fip); | |
1713 | tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32; | |
1714 | __get_user(num32, (unsigned int __user *)&save->foo); | |
1715 | tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32; | |
1716 | ||
1717 | /* | |
1718 | * Stack frames start with 16-bytes of temp space | |
1719 | */ | |
1720 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1721 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1722 | tos = (tsk->thread.fsr >> 11) & 7; |
1723 | for (i = 0; i < 8; i++) | |
1724 | get_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos); | |
1725 | ||
1726 | __get_user(mxcsr, (unsigned int __user *)&save->mxcsr); | |
1727 | num64 = mxcsr & 0xff10; | |
1728 | tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000UL)) | (num64<<32); | |
1729 | num64 = mxcsr & 0x3f; | |
1730 | tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000UL)) | (num64<<32); | |
1731 | ||
1732 | for (i = 0; i < 8; i++) { | |
1733 | copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32)); | |
1734 | memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long)); | |
1735 | memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long)); | |
1736 | } | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | asmlinkage long | |
1741 | sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data) | |
1742 | { | |
1743 | struct task_struct *child; | |
1744 | unsigned int value, tmp; | |
1745 | long i, ret; | |
1746 | ||
1747 | lock_kernel(); | |
1748 | if (request == PTRACE_TRACEME) { | |
6b9c7ed8 | 1749 | ret = ptrace_traceme(); |
1da177e4 LT |
1750 | goto out; |
1751 | } | |
1752 | ||
6b9c7ed8 CH |
1753 | child = ptrace_get_task_struct(pid); |
1754 | if (IS_ERR(child)) { | |
1755 | ret = PTR_ERR(child); | |
1da177e4 | 1756 | goto out; |
6b9c7ed8 | 1757 | } |
1da177e4 LT |
1758 | |
1759 | if (request == PTRACE_ATTACH) { | |
1760 | ret = sys_ptrace(request, pid, addr, data); | |
1761 | goto out_tsk; | |
1762 | } | |
1763 | ||
1764 | ret = ptrace_check_attach(child, request == PTRACE_KILL); | |
1765 | if (ret < 0) | |
1766 | goto out_tsk; | |
1767 | ||
1768 | switch (request) { | |
1769 | case PTRACE_PEEKTEXT: | |
1770 | case PTRACE_PEEKDATA: /* read word at location addr */ | |
1771 | ret = ia32_peek(child, addr, &value); | |
1772 | if (ret == 0) | |
1773 | ret = put_user(value, (unsigned int __user *) compat_ptr(data)); | |
1774 | else | |
1775 | ret = -EIO; | |
1776 | goto out_tsk; | |
1777 | ||
1778 | case PTRACE_POKETEXT: | |
1779 | case PTRACE_POKEDATA: /* write the word at location addr */ | |
1780 | ret = ia32_poke(child, addr, data); | |
1781 | goto out_tsk; | |
1782 | ||
1783 | case PTRACE_PEEKUSR: /* read word at addr in USER area */ | |
1784 | ret = -EIO; | |
1785 | if ((addr & 3) || addr > 17*sizeof(int)) | |
1786 | break; | |
1787 | ||
1788 | tmp = getreg(child, addr); | |
1789 | if (!put_user(tmp, (unsigned int __user *) compat_ptr(data))) | |
1790 | ret = 0; | |
1791 | break; | |
1792 | ||
1793 | case PTRACE_POKEUSR: /* write word at addr in USER area */ | |
1794 | ret = -EIO; | |
1795 | if ((addr & 3) || addr > 17*sizeof(int)) | |
1796 | break; | |
1797 | ||
1798 | putreg(child, addr, data); | |
1799 | ret = 0; | |
1800 | break; | |
1801 | ||
1802 | case IA32_PTRACE_GETREGS: | |
1803 | if (!access_ok(VERIFY_WRITE, compat_ptr(data), 17*sizeof(int))) { | |
1804 | ret = -EIO; | |
1805 | break; | |
1806 | } | |
1807 | for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) { | |
1808 | put_user(getreg(child, i), (unsigned int __user *) compat_ptr(data)); | |
1809 | data += sizeof(int); | |
1810 | } | |
1811 | ret = 0; | |
1812 | break; | |
1813 | ||
1814 | case IA32_PTRACE_SETREGS: | |
1815 | if (!access_ok(VERIFY_READ, compat_ptr(data), 17*sizeof(int))) { | |
1816 | ret = -EIO; | |
1817 | break; | |
1818 | } | |
1819 | for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) { | |
1820 | get_user(tmp, (unsigned int __user *) compat_ptr(data)); | |
1821 | putreg(child, i, tmp); | |
1822 | data += sizeof(int); | |
1823 | } | |
1824 | ret = 0; | |
1825 | break; | |
1826 | ||
1827 | case IA32_PTRACE_GETFPREGS: | |
1828 | ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct __user *) | |
1829 | compat_ptr(data)); | |
1830 | break; | |
1831 | ||
1832 | case IA32_PTRACE_GETFPXREGS: | |
1833 | ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *) | |
1834 | compat_ptr(data)); | |
1835 | break; | |
1836 | ||
1837 | case IA32_PTRACE_SETFPREGS: | |
1838 | ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct __user *) | |
1839 | compat_ptr(data)); | |
1840 | break; | |
1841 | ||
1842 | case IA32_PTRACE_SETFPXREGS: | |
1843 | ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *) | |
1844 | compat_ptr(data)); | |
1845 | break; | |
1846 | ||
1847 | case PTRACE_GETEVENTMSG: | |
1848 | ret = put_user(child->ptrace_message, (unsigned int __user *) compat_ptr(data)); | |
1849 | break; | |
1850 | ||
1851 | case PTRACE_SYSCALL: /* continue, stop after next syscall */ | |
1852 | case PTRACE_CONT: /* restart after signal. */ | |
1853 | case PTRACE_KILL: | |
1854 | case PTRACE_SINGLESTEP: /* execute chile for one instruction */ | |
1855 | case PTRACE_DETACH: /* detach a process */ | |
1856 | ret = sys_ptrace(request, pid, addr, data); | |
1857 | break; | |
1858 | ||
1859 | default: | |
1860 | ret = ptrace_request(child, request, addr, data); | |
1861 | break; | |
1862 | ||
1863 | } | |
1864 | out_tsk: | |
1865 | put_task_struct(child); | |
1866 | out: | |
1867 | unlock_kernel(); | |
1868 | return ret; | |
1869 | } | |
1870 | ||
1871 | typedef struct { | |
1872 | unsigned int ss_sp; | |
1873 | unsigned int ss_flags; | |
1874 | unsigned int ss_size; | |
1875 | } ia32_stack_t; | |
1876 | ||
1877 | asmlinkage long | |
1878 | sys32_sigaltstack (ia32_stack_t __user *uss32, ia32_stack_t __user *uoss32, | |
1879 | long arg2, long arg3, long arg4, long arg5, long arg6, | |
1880 | long arg7, struct pt_regs pt) | |
1881 | { | |
1882 | stack_t uss, uoss; | |
1883 | ia32_stack_t buf32; | |
1884 | int ret; | |
1885 | mm_segment_t old_fs = get_fs(); | |
1886 | ||
1887 | if (uss32) { | |
1888 | if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t))) | |
1889 | return -EFAULT; | |
1890 | uss.ss_sp = (void __user *) (long) buf32.ss_sp; | |
1891 | uss.ss_flags = buf32.ss_flags; | |
1892 | /* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the | |
1893 | check and set it to the user requested value later */ | |
1894 | if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) { | |
1895 | ret = -ENOMEM; | |
1896 | goto out; | |
1897 | } | |
1898 | uss.ss_size = MINSIGSTKSZ; | |
1899 | } | |
1900 | set_fs(KERNEL_DS); | |
1901 | ret = do_sigaltstack(uss32 ? (stack_t __user *) &uss : NULL, | |
1902 | (stack_t __user *) &uoss, pt.r12); | |
1903 | current->sas_ss_size = buf32.ss_size; | |
1904 | set_fs(old_fs); | |
1905 | out: | |
1906 | if (ret < 0) | |
1907 | return(ret); | |
1908 | if (uoss32) { | |
1909 | buf32.ss_sp = (long __user) uoss.ss_sp; | |
1910 | buf32.ss_flags = uoss.ss_flags; | |
1911 | buf32.ss_size = uoss.ss_size; | |
1912 | if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t))) | |
1913 | return -EFAULT; | |
1914 | } | |
1915 | return ret; | |
1916 | } | |
1917 | ||
1918 | asmlinkage int | |
1919 | sys32_pause (void) | |
1920 | { | |
1921 | current->state = TASK_INTERRUPTIBLE; | |
1922 | schedule(); | |
1923 | return -ERESTARTNOHAND; | |
1924 | } | |
1925 | ||
1926 | asmlinkage int | |
1927 | sys32_msync (unsigned int start, unsigned int len, int flags) | |
1928 | { | |
1929 | unsigned int addr; | |
1930 | ||
1931 | if (OFFSET4K(start)) | |
1932 | return -EINVAL; | |
1933 | addr = PAGE_START(start); | |
1934 | return sys_msync(addr, len + (start - addr), flags); | |
1935 | } | |
1936 | ||
1937 | struct sysctl32 { | |
1938 | unsigned int name; | |
1939 | int nlen; | |
1940 | unsigned int oldval; | |
1941 | unsigned int oldlenp; | |
1942 | unsigned int newval; | |
1943 | unsigned int newlen; | |
1944 | unsigned int __unused[4]; | |
1945 | }; | |
1946 | ||
1947 | #ifdef CONFIG_SYSCTL | |
1948 | asmlinkage long | |
1949 | sys32_sysctl (struct sysctl32 __user *args) | |
1950 | { | |
1951 | struct sysctl32 a32; | |
1952 | mm_segment_t old_fs = get_fs (); | |
1953 | void __user *oldvalp, *newvalp; | |
1954 | size_t oldlen; | |
1955 | int __user *namep; | |
1956 | long ret; | |
1957 | ||
1958 | if (copy_from_user(&a32, args, sizeof(a32))) | |
1959 | return -EFAULT; | |
1960 | ||
1961 | /* | |
1962 | * We need to pre-validate these because we have to disable address checking | |
1963 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the | |
1964 | * user specifying bad addresses here. Well, since we're dealing with 32 bit | |
1965 | * addresses, we KNOW that access_ok() will always succeed, so this is an | |
1966 | * expensive NOP, but so what... | |
1967 | */ | |
1968 | namep = (int __user *) compat_ptr(a32.name); | |
1969 | oldvalp = compat_ptr(a32.oldval); | |
1970 | newvalp = compat_ptr(a32.newval); | |
1971 | ||
1972 | if ((oldvalp && get_user(oldlen, (int __user *) compat_ptr(a32.oldlenp))) | |
1973 | || !access_ok(VERIFY_WRITE, namep, 0) | |
1974 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
1975 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
1976 | return -EFAULT; | |
1977 | ||
1978 | set_fs(KERNEL_DS); | |
1979 | lock_kernel(); | |
1980 | ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *) &oldlen, | |
1981 | newvalp, (size_t) a32.newlen); | |
1982 | unlock_kernel(); | |
1983 | set_fs(old_fs); | |
1984 | ||
1985 | if (oldvalp && put_user (oldlen, (int __user *) compat_ptr(a32.oldlenp))) | |
1986 | return -EFAULT; | |
1987 | ||
1988 | return ret; | |
1989 | } | |
1990 | #endif | |
1991 | ||
1992 | asmlinkage long | |
1993 | sys32_newuname (struct new_utsname __user *name) | |
1994 | { | |
1995 | int ret = sys_newuname(name); | |
1996 | ||
1997 | if (!ret) | |
1998 | if (copy_to_user(name->machine, "i686\0\0\0", 8)) | |
1999 | ret = -EFAULT; | |
2000 | return ret; | |
2001 | } | |
2002 | ||
2003 | asmlinkage long | |
2004 | sys32_getresuid16 (u16 __user *ruid, u16 __user *euid, u16 __user *suid) | |
2005 | { | |
2006 | uid_t a, b, c; | |
2007 | int ret; | |
2008 | mm_segment_t old_fs = get_fs(); | |
2009 | ||
2010 | set_fs(KERNEL_DS); | |
2011 | ret = sys_getresuid((uid_t __user *) &a, (uid_t __user *) &b, (uid_t __user *) &c); | |
2012 | set_fs(old_fs); | |
2013 | ||
2014 | if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid)) | |
2015 | return -EFAULT; | |
2016 | return ret; | |
2017 | } | |
2018 | ||
2019 | asmlinkage long | |
2020 | sys32_getresgid16 (u16 __user *rgid, u16 __user *egid, u16 __user *sgid) | |
2021 | { | |
2022 | gid_t a, b, c; | |
2023 | int ret; | |
2024 | mm_segment_t old_fs = get_fs(); | |
2025 | ||
2026 | set_fs(KERNEL_DS); | |
2027 | ret = sys_getresgid((gid_t __user *) &a, (gid_t __user *) &b, (gid_t __user *) &c); | |
2028 | set_fs(old_fs); | |
2029 | ||
2030 | if (ret) | |
2031 | return ret; | |
2032 | ||
2033 | return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid); | |
2034 | } | |
2035 | ||
2036 | asmlinkage long | |
2037 | sys32_lseek (unsigned int fd, int offset, unsigned int whence) | |
2038 | { | |
2039 | /* Sign-extension of "offset" is important here... */ | |
2040 | return sys_lseek(fd, offset, whence); | |
2041 | } | |
2042 | ||
2043 | static int | |
2044 | groups16_to_user(short __user *grouplist, struct group_info *group_info) | |
2045 | { | |
2046 | int i; | |
2047 | short group; | |
2048 | ||
2049 | for (i = 0; i < group_info->ngroups; i++) { | |
2050 | group = (short)GROUP_AT(group_info, i); | |
2051 | if (put_user(group, grouplist+i)) | |
2052 | return -EFAULT; | |
2053 | } | |
2054 | ||
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | static int | |
2059 | groups16_from_user(struct group_info *group_info, short __user *grouplist) | |
2060 | { | |
2061 | int i; | |
2062 | short group; | |
2063 | ||
2064 | for (i = 0; i < group_info->ngroups; i++) { | |
2065 | if (get_user(group, grouplist+i)) | |
2066 | return -EFAULT; | |
2067 | GROUP_AT(group_info, i) = (gid_t)group; | |
2068 | } | |
2069 | ||
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | asmlinkage long | |
2074 | sys32_getgroups16 (int gidsetsize, short __user *grouplist) | |
2075 | { | |
2076 | int i; | |
2077 | ||
2078 | if (gidsetsize < 0) | |
2079 | return -EINVAL; | |
2080 | ||
2081 | get_group_info(current->group_info); | |
2082 | i = current->group_info->ngroups; | |
2083 | if (gidsetsize) { | |
2084 | if (i > gidsetsize) { | |
2085 | i = -EINVAL; | |
2086 | goto out; | |
2087 | } | |
2088 | if (groups16_to_user(grouplist, current->group_info)) { | |
2089 | i = -EFAULT; | |
2090 | goto out; | |
2091 | } | |
2092 | } | |
2093 | out: | |
2094 | put_group_info(current->group_info); | |
2095 | return i; | |
2096 | } | |
2097 | ||
2098 | asmlinkage long | |
2099 | sys32_setgroups16 (int gidsetsize, short __user *grouplist) | |
2100 | { | |
2101 | struct group_info *group_info; | |
2102 | int retval; | |
2103 | ||
2104 | if (!capable(CAP_SETGID)) | |
2105 | return -EPERM; | |
2106 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
2107 | return -EINVAL; | |
2108 | ||
2109 | group_info = groups_alloc(gidsetsize); | |
2110 | if (!group_info) | |
2111 | return -ENOMEM; | |
2112 | retval = groups16_from_user(group_info, grouplist); | |
2113 | if (retval) { | |
2114 | put_group_info(group_info); | |
2115 | return retval; | |
2116 | } | |
2117 | ||
2118 | retval = set_current_groups(group_info); | |
2119 | put_group_info(group_info); | |
2120 | ||
2121 | return retval; | |
2122 | } | |
2123 | ||
2124 | asmlinkage long | |
2125 | sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi) | |
2126 | { | |
2127 | return sys_truncate(compat_ptr(path), ((unsigned long) len_hi << 32) | len_lo); | |
2128 | } | |
2129 | ||
2130 | asmlinkage long | |
2131 | sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi) | |
2132 | { | |
2133 | return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo); | |
2134 | } | |
2135 | ||
2136 | static int | |
2137 | putstat64 (struct stat64 __user *ubuf, struct kstat *kbuf) | |
2138 | { | |
2139 | int err; | |
2140 | u64 hdev; | |
2141 | ||
2142 | if (clear_user(ubuf, sizeof(*ubuf))) | |
2143 | return -EFAULT; | |
2144 | ||
2145 | hdev = huge_encode_dev(kbuf->dev); | |
2146 | err = __put_user(hdev, (u32 __user*)&ubuf->st_dev); | |
2147 | err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_dev) + 1); | |
2148 | err |= __put_user(kbuf->ino, &ubuf->__st_ino); | |
2149 | err |= __put_user(kbuf->ino, &ubuf->st_ino_lo); | |
2150 | err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi); | |
2151 | err |= __put_user(kbuf->mode, &ubuf->st_mode); | |
2152 | err |= __put_user(kbuf->nlink, &ubuf->st_nlink); | |
2153 | err |= __put_user(kbuf->uid, &ubuf->st_uid); | |
2154 | err |= __put_user(kbuf->gid, &ubuf->st_gid); | |
2155 | hdev = huge_encode_dev(kbuf->rdev); | |
2156 | err = __put_user(hdev, (u32 __user*)&ubuf->st_rdev); | |
2157 | err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_rdev) + 1); | |
2158 | err |= __put_user(kbuf->size, &ubuf->st_size_lo); | |
2159 | err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi); | |
2160 | err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime); | |
2161 | err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec); | |
2162 | err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime); | |
2163 | err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
2164 | err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime); | |
2165 | err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
2166 | err |= __put_user(kbuf->blksize, &ubuf->st_blksize); | |
2167 | err |= __put_user(kbuf->blocks, &ubuf->st_blocks); | |
2168 | return err; | |
2169 | } | |
2170 | ||
2171 | asmlinkage long | |
2172 | sys32_stat64 (char __user *filename, struct stat64 __user *statbuf) | |
2173 | { | |
2174 | struct kstat s; | |
2175 | long ret = vfs_stat(filename, &s); | |
2176 | if (!ret) | |
2177 | ret = putstat64(statbuf, &s); | |
2178 | return ret; | |
2179 | } | |
2180 | ||
2181 | asmlinkage long | |
2182 | sys32_lstat64 (char __user *filename, struct stat64 __user *statbuf) | |
2183 | { | |
2184 | struct kstat s; | |
2185 | long ret = vfs_lstat(filename, &s); | |
2186 | if (!ret) | |
2187 | ret = putstat64(statbuf, &s); | |
2188 | return ret; | |
2189 | } | |
2190 | ||
2191 | asmlinkage long | |
2192 | sys32_fstat64 (unsigned int fd, struct stat64 __user *statbuf) | |
2193 | { | |
2194 | struct kstat s; | |
2195 | long ret = vfs_fstat(fd, &s); | |
2196 | if (!ret) | |
2197 | ret = putstat64(statbuf, &s); | |
2198 | return ret; | |
2199 | } | |
2200 | ||
2201 | struct sysinfo32 { | |
2202 | s32 uptime; | |
2203 | u32 loads[3]; | |
2204 | u32 totalram; | |
2205 | u32 freeram; | |
2206 | u32 sharedram; | |
2207 | u32 bufferram; | |
2208 | u32 totalswap; | |
2209 | u32 freeswap; | |
2210 | u16 procs; | |
2211 | u16 pad; | |
2212 | u32 totalhigh; | |
2213 | u32 freehigh; | |
2214 | u32 mem_unit; | |
2215 | char _f[8]; | |
2216 | }; | |
2217 | ||
2218 | asmlinkage long | |
2219 | sys32_sysinfo (struct sysinfo32 __user *info) | |
2220 | { | |
2221 | struct sysinfo s; | |
2222 | long ret, err; | |
2223 | int bitcount = 0; | |
2224 | mm_segment_t old_fs = get_fs(); | |
2225 | ||
2226 | set_fs(KERNEL_DS); | |
2227 | ret = sys_sysinfo((struct sysinfo __user *) &s); | |
2228 | set_fs(old_fs); | |
2229 | /* Check to see if any memory value is too large for 32-bit and | |
2230 | * scale down if needed. | |
2231 | */ | |
2232 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
2233 | while (s.mem_unit < PAGE_SIZE) { | |
2234 | s.mem_unit <<= 1; | |
2235 | bitcount++; | |
2236 | } | |
2237 | s.totalram >>= bitcount; | |
2238 | s.freeram >>= bitcount; | |
2239 | s.sharedram >>= bitcount; | |
2240 | s.bufferram >>= bitcount; | |
2241 | s.totalswap >>= bitcount; | |
2242 | s.freeswap >>= bitcount; | |
2243 | s.totalhigh >>= bitcount; | |
2244 | s.freehigh >>= bitcount; | |
2245 | } | |
2246 | ||
2247 | if (!access_ok(VERIFY_WRITE, info, sizeof(*info))) | |
2248 | return -EFAULT; | |
2249 | ||
2250 | err = __put_user(s.uptime, &info->uptime); | |
2251 | err |= __put_user(s.loads[0], &info->loads[0]); | |
2252 | err |= __put_user(s.loads[1], &info->loads[1]); | |
2253 | err |= __put_user(s.loads[2], &info->loads[2]); | |
2254 | err |= __put_user(s.totalram, &info->totalram); | |
2255 | err |= __put_user(s.freeram, &info->freeram); | |
2256 | err |= __put_user(s.sharedram, &info->sharedram); | |
2257 | err |= __put_user(s.bufferram, &info->bufferram); | |
2258 | err |= __put_user(s.totalswap, &info->totalswap); | |
2259 | err |= __put_user(s.freeswap, &info->freeswap); | |
2260 | err |= __put_user(s.procs, &info->procs); | |
2261 | err |= __put_user (s.totalhigh, &info->totalhigh); | |
2262 | err |= __put_user (s.freehigh, &info->freehigh); | |
2263 | err |= __put_user (s.mem_unit, &info->mem_unit); | |
2264 | if (err) | |
2265 | return -EFAULT; | |
2266 | return ret; | |
2267 | } | |
2268 | ||
2269 | asmlinkage long | |
2270 | sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec __user *interval) | |
2271 | { | |
2272 | mm_segment_t old_fs = get_fs(); | |
2273 | struct timespec t; | |
2274 | long ret; | |
2275 | ||
2276 | set_fs(KERNEL_DS); | |
2277 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t); | |
2278 | set_fs(old_fs); | |
2279 | if (put_compat_timespec(&t, interval)) | |
2280 | return -EFAULT; | |
2281 | return ret; | |
2282 | } | |
2283 | ||
2284 | asmlinkage long | |
2285 | sys32_pread (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi) | |
2286 | { | |
2287 | return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo); | |
2288 | } | |
2289 | ||
2290 | asmlinkage long | |
2291 | sys32_pwrite (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi) | |
2292 | { | |
2293 | return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo); | |
2294 | } | |
2295 | ||
2296 | asmlinkage long | |
2297 | sys32_sendfile (int out_fd, int in_fd, int __user *offset, unsigned int count) | |
2298 | { | |
2299 | mm_segment_t old_fs = get_fs(); | |
2300 | long ret; | |
2301 | off_t of; | |
2302 | ||
2303 | if (offset && get_user(of, offset)) | |
2304 | return -EFAULT; | |
2305 | ||
2306 | set_fs(KERNEL_DS); | |
2307 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *) &of : NULL, count); | |
2308 | set_fs(old_fs); | |
2309 | ||
83b942bd | 2310 | if (offset && put_user(of, offset)) |
1da177e4 LT |
2311 | return -EFAULT; |
2312 | ||
2313 | return ret; | |
2314 | } | |
2315 | ||
2316 | asmlinkage long | |
2317 | sys32_personality (unsigned int personality) | |
2318 | { | |
2319 | long ret; | |
2320 | ||
2321 | if (current->personality == PER_LINUX32 && personality == PER_LINUX) | |
2322 | personality = PER_LINUX32; | |
2323 | ret = sys_personality(personality); | |
2324 | if (ret == PER_LINUX32) | |
2325 | ret = PER_LINUX; | |
2326 | return ret; | |
2327 | } | |
2328 | ||
2329 | asmlinkage unsigned long | |
2330 | sys32_brk (unsigned int brk) | |
2331 | { | |
2332 | unsigned long ret, obrk; | |
2333 | struct mm_struct *mm = current->mm; | |
2334 | ||
2335 | obrk = mm->brk; | |
2336 | ret = sys_brk(brk); | |
2337 | if (ret < obrk) | |
2338 | clear_user(compat_ptr(ret), PAGE_ALIGN(ret) - ret); | |
2339 | return ret; | |
2340 | } | |
2341 | ||
1da177e4 LT |
2342 | /* Structure for ia32 emulation on ia64 */ |
2343 | struct epoll_event32 | |
2344 | { | |
2345 | u32 events; | |
2346 | u32 data[2]; | |
2347 | }; | |
2348 | ||
2349 | asmlinkage long | |
2350 | sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 __user *event) | |
2351 | { | |
2352 | mm_segment_t old_fs = get_fs(); | |
2353 | struct epoll_event event64; | |
2354 | int error; | |
2355 | u32 data_halfword; | |
2356 | ||
2357 | if (!access_ok(VERIFY_READ, event, sizeof(struct epoll_event32))) | |
2358 | return -EFAULT; | |
2359 | ||
2360 | __get_user(event64.events, &event->events); | |
2361 | __get_user(data_halfword, &event->data[0]); | |
2362 | event64.data = data_halfword; | |
2363 | __get_user(data_halfword, &event->data[1]); | |
2364 | event64.data |= (u64)data_halfword << 32; | |
2365 | ||
2366 | set_fs(KERNEL_DS); | |
2367 | error = sys_epoll_ctl(epfd, op, fd, (struct epoll_event __user *) &event64); | |
2368 | set_fs(old_fs); | |
2369 | ||
2370 | return error; | |
2371 | } | |
2372 | ||
2373 | asmlinkage long | |
2374 | sys32_epoll_wait(int epfd, struct epoll_event32 __user * events, int maxevents, | |
2375 | int timeout) | |
2376 | { | |
2377 | struct epoll_event *events64 = NULL; | |
2378 | mm_segment_t old_fs = get_fs(); | |
d8caebd2 | 2379 | int numevents, size; |
1da177e4 LT |
2380 | int evt_idx; |
2381 | int do_free_pages = 0; | |
2382 | ||
2383 | if (maxevents <= 0) { | |
2384 | return -EINVAL; | |
2385 | } | |
2386 | ||
2387 | /* Verify that the area passed by the user is writeable */ | |
2388 | if (!access_ok(VERIFY_WRITE, events, maxevents * sizeof(struct epoll_event32))) | |
2389 | return -EFAULT; | |
2390 | ||
2391 | /* | |
2392 | * Allocate space for the intermediate copy. If the space needed | |
2393 | * is large enough to cause kmalloc to fail, then try again with | |
2394 | * __get_free_pages. | |
2395 | */ | |
2396 | size = maxevents * sizeof(struct epoll_event); | |
2397 | events64 = kmalloc(size, GFP_KERNEL); | |
2398 | if (events64 == NULL) { | |
2399 | events64 = (struct epoll_event *) | |
2400 | __get_free_pages(GFP_KERNEL, get_order(size)); | |
2401 | if (events64 == NULL) | |
2402 | return -ENOMEM; | |
2403 | do_free_pages = 1; | |
2404 | } | |
2405 | ||
2406 | /* Do the system call */ | |
2407 | set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/ | |
2408 | numevents = sys_epoll_wait(epfd, (struct epoll_event __user *) events64, | |
2409 | maxevents, timeout); | |
2410 | set_fs(old_fs); | |
2411 | ||
2412 | /* Don't modify userspace memory if we're returning an error */ | |
2413 | if (numevents > 0) { | |
2414 | /* Translate the 64-bit structures back into the 32-bit | |
2415 | structures */ | |
2416 | for (evt_idx = 0; evt_idx < numevents; evt_idx++) { | |
2417 | __put_user(events64[evt_idx].events, | |
2418 | &events[evt_idx].events); | |
2419 | __put_user((u32)events64[evt_idx].data, | |
2420 | &events[evt_idx].data[0]); | |
2421 | __put_user((u32)(events64[evt_idx].data >> 32), | |
2422 | &events[evt_idx].data[1]); | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | if (do_free_pages) | |
2427 | free_pages((unsigned long) events64, get_order(size)); | |
2428 | else | |
2429 | kfree(events64); | |
2430 | return numevents; | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * Get a yet unused TLS descriptor index. | |
2435 | */ | |
2436 | static int | |
2437 | get_free_idx (void) | |
2438 | { | |
2439 | struct thread_struct *t = ¤t->thread; | |
2440 | int idx; | |
2441 | ||
2442 | for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++) | |
2443 | if (desc_empty(t->tls_array + idx)) | |
2444 | return idx + GDT_ENTRY_TLS_MIN; | |
2445 | return -ESRCH; | |
2446 | } | |
2447 | ||
2448 | /* | |
2449 | * Set a given TLS descriptor: | |
2450 | */ | |
2451 | asmlinkage int | |
2452 | sys32_set_thread_area (struct ia32_user_desc __user *u_info) | |
2453 | { | |
2454 | struct thread_struct *t = ¤t->thread; | |
2455 | struct ia32_user_desc info; | |
2456 | struct desc_struct *desc; | |
2457 | int cpu, idx; | |
2458 | ||
2459 | if (copy_from_user(&info, u_info, sizeof(info))) | |
2460 | return -EFAULT; | |
2461 | idx = info.entry_number; | |
2462 | ||
2463 | /* | |
2464 | * index -1 means the kernel should try to find and allocate an empty descriptor: | |
2465 | */ | |
2466 | if (idx == -1) { | |
2467 | idx = get_free_idx(); | |
2468 | if (idx < 0) | |
2469 | return idx; | |
2470 | if (put_user(idx, &u_info->entry_number)) | |
2471 | return -EFAULT; | |
2472 | } | |
2473 | ||
2474 | if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) | |
2475 | return -EINVAL; | |
2476 | ||
2477 | desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN; | |
2478 | ||
2479 | cpu = smp_processor_id(); | |
2480 | ||
2481 | if (LDT_empty(&info)) { | |
2482 | desc->a = 0; | |
2483 | desc->b = 0; | |
2484 | } else { | |
2485 | desc->a = LDT_entry_a(&info); | |
2486 | desc->b = LDT_entry_b(&info); | |
2487 | } | |
2488 | load_TLS(t, cpu); | |
2489 | return 0; | |
2490 | } | |
2491 | ||
2492 | /* | |
2493 | * Get the current Thread-Local Storage area: | |
2494 | */ | |
2495 | ||
2496 | #define GET_BASE(desc) ( \ | |
2497 | (((desc)->a >> 16) & 0x0000ffff) | \ | |
2498 | (((desc)->b << 16) & 0x00ff0000) | \ | |
2499 | ( (desc)->b & 0xff000000) ) | |
2500 | ||
2501 | #define GET_LIMIT(desc) ( \ | |
2502 | ((desc)->a & 0x0ffff) | \ | |
2503 | ((desc)->b & 0xf0000) ) | |
2504 | ||
2505 | #define GET_32BIT(desc) (((desc)->b >> 22) & 1) | |
2506 | #define GET_CONTENTS(desc) (((desc)->b >> 10) & 3) | |
2507 | #define GET_WRITABLE(desc) (((desc)->b >> 9) & 1) | |
2508 | #define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1) | |
2509 | #define GET_PRESENT(desc) (((desc)->b >> 15) & 1) | |
2510 | #define GET_USEABLE(desc) (((desc)->b >> 20) & 1) | |
2511 | ||
2512 | asmlinkage int | |
2513 | sys32_get_thread_area (struct ia32_user_desc __user *u_info) | |
2514 | { | |
2515 | struct ia32_user_desc info; | |
2516 | struct desc_struct *desc; | |
2517 | int idx; | |
2518 | ||
2519 | if (get_user(idx, &u_info->entry_number)) | |
2520 | return -EFAULT; | |
2521 | if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) | |
2522 | return -EINVAL; | |
2523 | ||
2524 | desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN; | |
2525 | ||
2526 | info.entry_number = idx; | |
2527 | info.base_addr = GET_BASE(desc); | |
2528 | info.limit = GET_LIMIT(desc); | |
2529 | info.seg_32bit = GET_32BIT(desc); | |
2530 | info.contents = GET_CONTENTS(desc); | |
2531 | info.read_exec_only = !GET_WRITABLE(desc); | |
2532 | info.limit_in_pages = GET_LIMIT_PAGES(desc); | |
2533 | info.seg_not_present = !GET_PRESENT(desc); | |
2534 | info.useable = GET_USEABLE(desc); | |
2535 | ||
2536 | if (copy_to_user(u_info, &info, sizeof(info))) | |
2537 | return -EFAULT; | |
2538 | return 0; | |
2539 | } | |
2540 | ||
1da177e4 LT |
2541 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
2542 | __u32 len_low, __u32 len_high, int advice) | |
2543 | { | |
2544 | return sys_fadvise64_64(fd, | |
2545 | (((u64)offset_high)<<32) | offset_low, | |
2546 | (((u64)len_high)<<32) | len_low, | |
2547 | advice); | |
2548 | } | |
2549 | ||
2550 | #ifdef NOTYET /* UNTESTED FOR IA64 FROM HERE DOWN */ | |
2551 | ||
2552 | asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid) | |
2553 | { | |
2554 | uid_t sruid, seuid; | |
2555 | ||
2556 | sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid); | |
2557 | seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid); | |
2558 | return sys_setreuid(sruid, seuid); | |
2559 | } | |
2560 | ||
2561 | asmlinkage long | |
2562 | sys32_setresuid(compat_uid_t ruid, compat_uid_t euid, | |
2563 | compat_uid_t suid) | |
2564 | { | |
2565 | uid_t sruid, seuid, ssuid; | |
2566 | ||
2567 | sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid); | |
2568 | seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid); | |
2569 | ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid); | |
2570 | return sys_setresuid(sruid, seuid, ssuid); | |
2571 | } | |
2572 | ||
2573 | asmlinkage long | |
2574 | sys32_setregid(compat_gid_t rgid, compat_gid_t egid) | |
2575 | { | |
2576 | gid_t srgid, segid; | |
2577 | ||
2578 | srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid); | |
2579 | segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid); | |
2580 | return sys_setregid(srgid, segid); | |
2581 | } | |
2582 | ||
2583 | asmlinkage long | |
2584 | sys32_setresgid(compat_gid_t rgid, compat_gid_t egid, | |
2585 | compat_gid_t sgid) | |
2586 | { | |
2587 | gid_t srgid, segid, ssgid; | |
2588 | ||
2589 | srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid); | |
2590 | segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid); | |
2591 | ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid); | |
2592 | return sys_setresgid(srgid, segid, ssgid); | |
2593 | } | |
2594 | ||
2595 | /* Handle adjtimex compatibility. */ | |
2596 | ||
2597 | struct timex32 { | |
2598 | u32 modes; | |
2599 | s32 offset, freq, maxerror, esterror; | |
2600 | s32 status, constant, precision, tolerance; | |
2601 | struct compat_timeval time; | |
2602 | s32 tick; | |
2603 | s32 ppsfreq, jitter, shift, stabil; | |
2604 | s32 jitcnt, calcnt, errcnt, stbcnt; | |
2605 | s32 :32; s32 :32; s32 :32; s32 :32; | |
2606 | s32 :32; s32 :32; s32 :32; s32 :32; | |
2607 | s32 :32; s32 :32; s32 :32; s32 :32; | |
2608 | }; | |
2609 | ||
2610 | extern int do_adjtimex(struct timex *); | |
2611 | ||
2612 | asmlinkage long | |
2613 | sys32_adjtimex(struct timex32 *utp) | |
2614 | { | |
2615 | struct timex txc; | |
2616 | int ret; | |
2617 | ||
2618 | memset(&txc, 0, sizeof(struct timex)); | |
2619 | ||
2620 | if(get_user(txc.modes, &utp->modes) || | |
2621 | __get_user(txc.offset, &utp->offset) || | |
2622 | __get_user(txc.freq, &utp->freq) || | |
2623 | __get_user(txc.maxerror, &utp->maxerror) || | |
2624 | __get_user(txc.esterror, &utp->esterror) || | |
2625 | __get_user(txc.status, &utp->status) || | |
2626 | __get_user(txc.constant, &utp->constant) || | |
2627 | __get_user(txc.precision, &utp->precision) || | |
2628 | __get_user(txc.tolerance, &utp->tolerance) || | |
2629 | __get_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
2630 | __get_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
2631 | __get_user(txc.tick, &utp->tick) || | |
2632 | __get_user(txc.ppsfreq, &utp->ppsfreq) || | |
2633 | __get_user(txc.jitter, &utp->jitter) || | |
2634 | __get_user(txc.shift, &utp->shift) || | |
2635 | __get_user(txc.stabil, &utp->stabil) || | |
2636 | __get_user(txc.jitcnt, &utp->jitcnt) || | |
2637 | __get_user(txc.calcnt, &utp->calcnt) || | |
2638 | __get_user(txc.errcnt, &utp->errcnt) || | |
2639 | __get_user(txc.stbcnt, &utp->stbcnt)) | |
2640 | return -EFAULT; | |
2641 | ||
2642 | ret = do_adjtimex(&txc); | |
2643 | ||
2644 | if(put_user(txc.modes, &utp->modes) || | |
2645 | __put_user(txc.offset, &utp->offset) || | |
2646 | __put_user(txc.freq, &utp->freq) || | |
2647 | __put_user(txc.maxerror, &utp->maxerror) || | |
2648 | __put_user(txc.esterror, &utp->esterror) || | |
2649 | __put_user(txc.status, &utp->status) || | |
2650 | __put_user(txc.constant, &utp->constant) || | |
2651 | __put_user(txc.precision, &utp->precision) || | |
2652 | __put_user(txc.tolerance, &utp->tolerance) || | |
2653 | __put_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
2654 | __put_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
2655 | __put_user(txc.tick, &utp->tick) || | |
2656 | __put_user(txc.ppsfreq, &utp->ppsfreq) || | |
2657 | __put_user(txc.jitter, &utp->jitter) || | |
2658 | __put_user(txc.shift, &utp->shift) || | |
2659 | __put_user(txc.stabil, &utp->stabil) || | |
2660 | __put_user(txc.jitcnt, &utp->jitcnt) || | |
2661 | __put_user(txc.calcnt, &utp->calcnt) || | |
2662 | __put_user(txc.errcnt, &utp->errcnt) || | |
2663 | __put_user(txc.stbcnt, &utp->stbcnt)) | |
2664 | ret = -EFAULT; | |
2665 | ||
2666 | return ret; | |
2667 | } | |
2668 | #endif /* NOTYET */ |