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Initial commit
[wrt350n-kernel.git] / arch / ia64 / ia32 / sys_ia32.c
blobd025a22eb225f6bf455ec5a76b47434dc09a0977
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/kernel.h>
18 #include <linux/syscalls.h>
19 #include <linux/sysctl.h>
20 #include <linux/sched.h>
21 #include <linux/fs.h>
22 #include <linux/file.h>
23 #include <linux/signal.h>
24 #include <linux/resource.h>
25 #include <linux/times.h>
26 #include <linux/utsname.h>
27 #include <linux/smp.h>
28 #include <linux/smp_lock.h>
29 #include <linux/sem.h>
30 #include <linux/msg.h>
31 #include <linux/mm.h>
32 #include <linux/shm.h>
33 #include <linux/slab.h>
34 #include <linux/uio.h>
35 #include <linux/nfs_fs.h>
36 #include <linux/quota.h>
37 #include <linux/sunrpc/svc.h>
38 #include <linux/nfsd/nfsd.h>
39 #include <linux/nfsd/cache.h>
40 #include <linux/nfsd/xdr.h>
41 #include <linux/nfsd/syscall.h>
42 #include <linux/poll.h>
43 #include <linux/eventpoll.h>
44 #include <linux/personality.h>
45 #include <linux/ptrace.h>
46 #include <linux/stat.h>
47 #include <linux/ipc.h>
48 #include <linux/capability.h>
49 #include <linux/compat.h>
50 #include <linux/vfs.h>
51 #include <linux/mman.h>
52 #include <linux/mutex.h>
53
54 #include <asm/intrinsics.h>
55 #include <asm/types.h>
56 #include <asm/uaccess.h>
57 #include <asm/unistd.h>
58
59 #include "ia32priv.h"
60
61 #include <net/scm.h>
62 #include <net/sock.h>
63
64 #define DEBUG 0
65
66 #if DEBUG
67 # define DBG(fmt...) printk(KERN_DEBUG fmt)
68 #else
69 # define DBG(fmt...)
70 #endif
71
72 #define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
73
74 #define OFFSET4K(a) ((a) & 0xfff)
75 #define PAGE_START(addr) ((addr) & PAGE_MASK)
76 #define MINSIGSTKSZ_IA32 2048
77
78 #define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid))
79 #define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid))
80
81 /*
82 * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore
83 * while doing so.
84 */
85 /* XXX make per-mm: */
86 static DEFINE_MUTEX(ia32_mmap_mutex);
87
88 asmlinkage long
89 sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp,
90 struct pt_regs *regs)
91 {
92 long error;
93 char *filename;
94 unsigned long old_map_base, old_task_size, tssd;
95
96 filename = getname(name);
97 error = PTR_ERR(filename);
98 if (IS_ERR(filename))
99 return error;
100
101 old_map_base = current->thread.map_base;
102 old_task_size = current->thread.task_size;
103 tssd = ia64_get_kr(IA64_KR_TSSD);
104
105 /* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */
106 current->thread.map_base = DEFAULT_MAP_BASE;
107 current->thread.task_size = DEFAULT_TASK_SIZE;
108 ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob);
109 ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1);
110
111 error = compat_do_execve(filename, argv, envp, regs);
112 putname(filename);
113
114 if (error < 0) {
115 /* oops, execve failed, switch back to old values... */
116 ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE);
117 ia64_set_kr(IA64_KR_TSSD, tssd);
118 current->thread.map_base = old_map_base;
119 current->thread.task_size = old_task_size;
120 }
121
122 return error;
123 }
124
125 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
126 {
127 compat_ino_t ino;
128 int err;
129
130 if ((u64) stat->size > MAX_NON_LFS ||
131 !old_valid_dev(stat->dev) ||
132 !old_valid_dev(stat->rdev))
133 return -EOVERFLOW;
134
135 ino = stat->ino;
136 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
137 return -EOVERFLOW;
138
139 if (clear_user(ubuf, sizeof(*ubuf)))
140 return -EFAULT;
141
142 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
143 err |= __put_user(ino, &ubuf->st_ino);
144 err |= __put_user(stat->mode, &ubuf->st_mode);
145 err |= __put_user(stat->nlink, &ubuf->st_nlink);
146 err |= __put_user(high2lowuid(stat->uid), &ubuf->st_uid);
147 err |= __put_user(high2lowgid(stat->gid), &ubuf->st_gid);
148 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
149 err |= __put_user(stat->size, &ubuf->st_size);
150 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
151 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
152 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
153 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
154 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
155 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
156 err |= __put_user(stat->blksize, &ubuf->st_blksize);
157 err |= __put_user(stat->blocks, &ubuf->st_blocks);
158 return err;
159 }
160
161 #if PAGE_SHIFT > IA32_PAGE_SHIFT
162
163
164 static int
165 get_page_prot (struct vm_area_struct *vma, unsigned long addr)
166 {
167 int prot = 0;
168
169 if (!vma || vma->vm_start > addr)
170 return 0;
171
172 if (vma->vm_flags & VM_READ)
173 prot |= PROT_READ;
174 if (vma->vm_flags & VM_WRITE)
175 prot |= PROT_WRITE;
176 if (vma->vm_flags & VM_EXEC)
177 prot |= PROT_EXEC;
178 return prot;
179 }
180
181 /*
182 * Map a subpage by creating an anonymous page that contains the union of the old page and
183 * the subpage.
184 */
185 static unsigned long
186 mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags,
187 loff_t off)
188 {
189 void *page = NULL;
190 struct inode *inode;
191 unsigned long ret = 0;
192 struct vm_area_struct *vma = find_vma(current->mm, start);
193 int old_prot = get_page_prot(vma, start);
194
195 DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n",
196 file, start, end, prot, flags, off);
197
198
199 /* Optimize the case where the old mmap and the new mmap are both anonymous */
200 if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) {
201 if (clear_user((void __user *) start, end - start)) {
202 ret = -EFAULT;
203 goto out;
204 }
205 goto skip_mmap;
206 }
207
208 page = (void *) get_zeroed_page(GFP_KERNEL);
209 if (!page)
210 return -ENOMEM;
211
212 if (old_prot)
213 copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE);
214
215 down_write(&current->mm->mmap_sem);
216 {
217 ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE,
218 flags | MAP_FIXED | MAP_ANONYMOUS, 0);
219 }
220 up_write(&current->mm->mmap_sem);
221
222 if (IS_ERR((void *) ret))
223 goto out;
224
225 if (old_prot) {
226 /* copy back the old page contents. */
227 if (offset_in_page(start))
228 copy_to_user((void __user *) PAGE_START(start), page,
229 offset_in_page(start));
230 if (offset_in_page(end))
231 copy_to_user((void __user *) end, page + offset_in_page(end),
232 PAGE_SIZE - offset_in_page(end));
233 }
234
235 if (!(flags & MAP_ANONYMOUS)) {
236 /* read the file contents */
237 inode = file->f_path.dentry->d_inode;
238 if (!inode->i_fop || !file->f_op->read
239 || ((*file->f_op->read)(file, (char __user *) start, end - start, &off) < 0))
240 {
241 ret = -EINVAL;
242 goto out;
243 }
244 }
245
246 skip_mmap:
247 if (!(prot & PROT_WRITE))
248 ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot);
249 out:
250 if (page)
251 free_page((unsigned long) page);
252 return ret;
253 }
254
255 /* SLAB cache for ia64_partial_page structures */
256 struct kmem_cache *ia64_partial_page_cachep;
257
258 /*
259 * init ia64_partial_page_list.
260 * return 0 means kmalloc fail.
261 */
262 struct ia64_partial_page_list*
263 ia32_init_pp_list(void)
264 {
265 struct ia64_partial_page_list *p;
266
267 if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL)
268 return p;
269 p->pp_head = NULL;
270 p->ppl_rb = RB_ROOT;
271 p->pp_hint = NULL;
272 atomic_set(&p->pp_count, 1);
273 return p;
274 }
275
276 /*
277 * Search for the partial page with @start in partial page list @ppl.
278 * If finds the partial page, return the found partial page.
279 * Else, return 0 and provide @pprev, @rb_link, @rb_parent to
280 * be used by later __ia32_insert_pp().
281 */
282 static struct ia64_partial_page *
283 __ia32_find_pp(struct ia64_partial_page_list *ppl, unsigned int start,
284 struct ia64_partial_page **pprev, struct rb_node ***rb_link,
285 struct rb_node **rb_parent)
286 {
287 struct ia64_partial_page *pp;
288 struct rb_node **__rb_link, *__rb_parent, *rb_prev;
289
290 pp = ppl->pp_hint;
291 if (pp && pp->base == start)
292 return pp;
293
294 __rb_link = &ppl->ppl_rb.rb_node;
295 rb_prev = __rb_parent = NULL;
296
297 while (*__rb_link) {
298 __rb_parent = *__rb_link;
299 pp = rb_entry(__rb_parent, struct ia64_partial_page, pp_rb);
300
301 if (pp->base == start) {
302 ppl->pp_hint = pp;
303 return pp;
304 } else if (pp->base < start) {
305 rb_prev = __rb_parent;
306 __rb_link = &__rb_parent->rb_right;
307 } else {
308 __rb_link = &__rb_parent->rb_left;
309 }
310 }
311
312 *rb_link = __rb_link;
313 *rb_parent = __rb_parent;
314 *pprev = NULL;
315 if (rb_prev)
316 *pprev = rb_entry(rb_prev, struct ia64_partial_page, pp_rb);
317 return NULL;
318 }
319
320 /*
321 * insert @pp into @ppl.
322 */
323 static void
324 __ia32_insert_pp(struct ia64_partial_page_list *ppl,
325 struct ia64_partial_page *pp, struct ia64_partial_page *prev,
326 struct rb_node **rb_link, struct rb_node *rb_parent)
327 {
328 /* link list */
329 if (prev) {
330 pp->next = prev->next;
331 prev->next = pp;
332 } else {
333 ppl->pp_head = pp;
334 if (rb_parent)
335 pp->next = rb_entry(rb_parent,
336 struct ia64_partial_page, pp_rb);
337 else
338 pp->next = NULL;
339 }
340
341 /* link rb */
342 rb_link_node(&pp->pp_rb, rb_parent, rb_link);
343 rb_insert_color(&pp->pp_rb, &ppl->ppl_rb);
344
345 ppl->pp_hint = pp;
346 }
347
348 /*
349 * delete @pp from partial page list @ppl.
350 */
351 static void
352 __ia32_delete_pp(struct ia64_partial_page_list *ppl,
353 struct ia64_partial_page *pp, struct ia64_partial_page *prev)
354 {
355 if (prev) {
356 prev->next = pp->next;
357 if (ppl->pp_hint == pp)
358 ppl->pp_hint = prev;
359 } else {
360 ppl->pp_head = pp->next;
361 if (ppl->pp_hint == pp)
362 ppl->pp_hint = pp->next;
363 }
364 rb_erase(&pp->pp_rb, &ppl->ppl_rb);
365 kmem_cache_free(ia64_partial_page_cachep, pp);
366 }
367
368 static struct ia64_partial_page *
369 __pp_prev(struct ia64_partial_page *pp)
370 {
371 struct rb_node *prev = rb_prev(&pp->pp_rb);
372 if (prev)
373 return rb_entry(prev, struct ia64_partial_page, pp_rb);
374 else
375 return NULL;
376 }
377
378 /*
379 * Delete partial pages with address between @start and @end.
380 * @start and @end are page aligned.
381 */
382 static void
383 __ia32_delete_pp_range(unsigned int start, unsigned int end)
384 {
385 struct ia64_partial_page *pp, *prev;
386 struct rb_node **rb_link, *rb_parent;
387
388 if (start >= end)
389 return;
390
391 pp = __ia32_find_pp(current->thread.ppl, start, &prev,
392 &rb_link, &rb_parent);
393 if (pp)
394 prev = __pp_prev(pp);
395 else {
396 if (prev)
397 pp = prev->next;
398 else
399 pp = current->thread.ppl->pp_head;
400 }
401
402 while (pp && pp->base < end) {
403 struct ia64_partial_page *tmp = pp->next;
404 __ia32_delete_pp(current->thread.ppl, pp, prev);
405 pp = tmp;
406 }
407 }
408
409 /*
410 * Set the range between @start and @end in bitmap.
411 * @start and @end should be IA32 page aligned and in the same IA64 page.
412 */
413 static int
414 __ia32_set_pp(unsigned int start, unsigned int end, int flags)
415 {
416 struct ia64_partial_page *pp, *prev;
417 struct rb_node ** rb_link, *rb_parent;
418 unsigned int pstart, start_bit, end_bit, i;
419
420 pstart = PAGE_START(start);
421 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
422 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
423 if (end_bit == 0)
424 end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
425 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
426 &rb_link, &rb_parent);
427 if (pp) {
428 for (i = start_bit; i < end_bit; i++)
429 set_bit(i, &pp->bitmap);
430 /*
431 * Check: if this partial page has been set to a full page,
432 * then delete it.
433 */
434 if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >=
435 PAGE_SIZE/IA32_PAGE_SIZE) {
436 __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
437 }
438 return 0;
439 }
440
441 /*
442 * MAP_FIXED may lead to overlapping mmap.
443 * In this case, the requested mmap area may already mmaped as a full
444 * page. So check vma before adding a new partial page.
445 */
446 if (flags & MAP_FIXED) {
447 struct vm_area_struct *vma = find_vma(current->mm, pstart);
448 if (vma && vma->vm_start <= pstart)
449 return 0;
450 }
451
452 /* new a ia64_partial_page */
453 pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
454 if (!pp)
455 return -ENOMEM;
456 pp->base = pstart;
457 pp->bitmap = 0;
458 for (i=start_bit; i<end_bit; i++)
459 set_bit(i, &(pp->bitmap));
460 pp->next = NULL;
461 __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
462 return 0;
463 }
464
465 /*
466 * @start and @end should be IA32 page aligned, but don't need to be in the
467 * same IA64 page. Split @start and @end to make sure they're in the same IA64
468 * page, then call __ia32_set_pp().
469 */
470 static void
471 ia32_set_pp(unsigned int start, unsigned int end, int flags)
472 {
473 down_write(&current->mm->mmap_sem);
474 if (flags & MAP_FIXED) {
475 /*
476 * MAP_FIXED may lead to overlapping mmap. When this happens,
477 * a series of complete IA64 pages results in deletion of
478 * old partial pages in that range.
479 */
480 __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
481 }
482
483 if (end < PAGE_ALIGN(start)) {
484 __ia32_set_pp(start, end, flags);
485 } else {
486 if (offset_in_page(start))
487 __ia32_set_pp(start, PAGE_ALIGN(start), flags);
488 if (offset_in_page(end))
489 __ia32_set_pp(PAGE_START(end), end, flags);
490 }
491 up_write(&current->mm->mmap_sem);
492 }
493
494 /*
495 * Unset the range between @start and @end in bitmap.
496 * @start and @end should be IA32 page aligned and in the same IA64 page.
497 * After doing that, if the bitmap is 0, then free the page and return 1,
498 * else return 0;
499 * If not find the partial page in the list, then
500 * If the vma exists, then the full page is set to a partial page;
501 * Else return -ENOMEM.
502 */
503 static int
504 __ia32_unset_pp(unsigned int start, unsigned int end)
505 {
506 struct ia64_partial_page *pp, *prev;
507 struct rb_node ** rb_link, *rb_parent;
508 unsigned int pstart, start_bit, end_bit, i;
509 struct vm_area_struct *vma;
510
511 pstart = PAGE_START(start);
512 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
513 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
514 if (end_bit == 0)
515 end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
516
517 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
518 &rb_link, &rb_parent);
519 if (pp) {
520 for (i = start_bit; i < end_bit; i++)
521 clear_bit(i, &pp->bitmap);
522 if (pp->bitmap == 0) {
523 __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
524 return 1;
525 }
526 return 0;
527 }
528
529 vma = find_vma(current->mm, pstart);
530 if (!vma || vma->vm_start > pstart) {
531 return -ENOMEM;
532 }
533
534 /* new a ia64_partial_page */
535 pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
536 if (!pp)
537 return -ENOMEM;
538 pp->base = pstart;
539 pp->bitmap = 0;
540 for (i = 0; i < start_bit; i++)
541 set_bit(i, &(pp->bitmap));
542 for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++)
543 set_bit(i, &(pp->bitmap));
544 pp->next = NULL;
545 __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
546 return 0;
547 }
548
549 /*
550 * Delete pp between PAGE_ALIGN(start) and PAGE_START(end) by calling
551 * __ia32_delete_pp_range(). Unset possible partial pages by calling
552 * __ia32_unset_pp().
553 * The returned value see __ia32_unset_pp().
554 */
555 static int
556 ia32_unset_pp(unsigned int *startp, unsigned int *endp)
557 {
558 unsigned int start = *startp, end = *endp;
559 int ret = 0;
560
561 down_write(&current->mm->mmap_sem);
562
563 __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
564
565 if (end < PAGE_ALIGN(start)) {
566 ret = __ia32_unset_pp(start, end);
567 if (ret == 1) {
568 *startp = PAGE_START(start);
569 *endp = PAGE_ALIGN(end);
570 }
571 if (ret == 0) {
572 /* to shortcut sys_munmap() in sys32_munmap() */
573 *startp = PAGE_START(start);
574 *endp = PAGE_START(end);
575 }
576 } else {
577 if (offset_in_page(start)) {
578 ret = __ia32_unset_pp(start, PAGE_ALIGN(start));
579 if (ret == 1)
580 *startp = PAGE_START(start);
581 if (ret == 0)
582 *startp = PAGE_ALIGN(start);
583 if (ret < 0)
584 goto out;
585 }
586 if (offset_in_page(end)) {
587 ret = __ia32_unset_pp(PAGE_START(end), end);
588 if (ret == 1)
589 *endp = PAGE_ALIGN(end);
590 if (ret == 0)
591 *endp = PAGE_START(end);
592 }
593 }
594
595 out:
596 up_write(&current->mm->mmap_sem);
597 return ret;
598 }
599
600 /*
601 * Compare the range between @start and @end with bitmap in partial page.
602 * @start and @end should be IA32 page aligned and in the same IA64 page.
603 */
604 static int
605 __ia32_compare_pp(unsigned int start, unsigned int end)
606 {
607 struct ia64_partial_page *pp, *prev;
608 struct rb_node ** rb_link, *rb_parent;
609 unsigned int pstart, start_bit, end_bit, size;
610 unsigned int first_bit, next_zero_bit; /* the first range in bitmap */
611
612 pstart = PAGE_START(start);
613
614 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
615 &rb_link, &rb_parent);
616 if (!pp)
617 return 1;
618
619 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
620 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
621 size = sizeof(pp->bitmap) * 8;
622 first_bit = find_first_bit(&pp->bitmap, size);
623 next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit);
624 if ((start_bit < first_bit) || (end_bit > next_zero_bit)) {
625 /* exceeds the first range in bitmap */
626 return -ENOMEM;
627 } else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) {
628 first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit);
629 if ((next_zero_bit < first_bit) && (first_bit < size))
630 return 1; /* has next range */
631 else
632 return 0; /* no next range */
633 } else
634 return 1;
635 }
636
637 /*
638 * @start and @end should be IA32 page aligned, but don't need to be in the
639 * same IA64 page. Split @start and @end to make sure they're in the same IA64
640 * page, then call __ia32_compare_pp().
641 *
642 * Take this as example: the range is the 1st and 2nd 4K page.
643 * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011;
644 * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111;
645 * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or
646 * bitmap = 00000101.
647 */
648 static int
649 ia32_compare_pp(unsigned int *startp, unsigned int *endp)
650 {
651 unsigned int start = *startp, end = *endp;
652 int retval = 0;
653
654 down_write(&current->mm->mmap_sem);
655
656 if (end < PAGE_ALIGN(start)) {
657 retval = __ia32_compare_pp(start, end);
658 if (retval == 0) {
659 *startp = PAGE_START(start);
660 *endp = PAGE_ALIGN(end);
661 }
662 } else {
663 if (offset_in_page(start)) {
664 retval = __ia32_compare_pp(start,
665 PAGE_ALIGN(start));
666 if (retval == 0)
667 *startp = PAGE_START(start);
668 if (retval < 0)
669 goto out;
670 }
671 if (offset_in_page(end)) {
672 retval = __ia32_compare_pp(PAGE_START(end), end);
673 if (retval == 0)
674 *endp = PAGE_ALIGN(end);
675 }
676 }
677
678 out:
679 up_write(&current->mm->mmap_sem);
680 return retval;
681 }
682
683 static void
684 __ia32_drop_pp_list(struct ia64_partial_page_list *ppl)
685 {
686 struct ia64_partial_page *pp = ppl->pp_head;
687
688 while (pp) {
689 struct ia64_partial_page *next = pp->next;
690 kmem_cache_free(ia64_partial_page_cachep, pp);
691 pp = next;
692 }
693
694 kfree(ppl);
695 }
696
697 void
698 ia32_drop_ia64_partial_page_list(struct task_struct *task)
699 {
700 struct ia64_partial_page_list* ppl = task->thread.ppl;
701
702 if (ppl && atomic_dec_and_test(&ppl->pp_count))
703 __ia32_drop_pp_list(ppl);
704 }
705
706 /*
707 * Copy current->thread.ppl to ppl (already initialized).
708 */
709 static int
710 __ia32_copy_pp_list(struct ia64_partial_page_list *ppl)
711 {
712 struct ia64_partial_page *pp, *tmp, *prev;
713 struct rb_node **rb_link, *rb_parent;
714
715 ppl->pp_head = NULL;
716 ppl->pp_hint = NULL;
717 ppl->ppl_rb = RB_ROOT;
718 rb_link = &ppl->ppl_rb.rb_node;
719 rb_parent = NULL;
720 prev = NULL;
721
722 for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) {
723 tmp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
724 if (!tmp)
725 return -ENOMEM;
726 *tmp = *pp;
727 __ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent);
728 prev = tmp;
729 rb_link = &tmp->pp_rb.rb_right;
730 rb_parent = &tmp->pp_rb;
731 }
732 return 0;
733 }
734
735 int
736 ia32_copy_ia64_partial_page_list(struct task_struct *p,
737 unsigned long clone_flags)
738 {
739 int retval = 0;
740
741 if (clone_flags & CLONE_VM) {
742 atomic_inc(&current->thread.ppl->pp_count);
743 p->thread.ppl = current->thread.ppl;
744 } else {
745 p->thread.ppl = ia32_init_pp_list();
746 if (!p->thread.ppl)
747 return -ENOMEM;
748 down_write(&current->mm->mmap_sem);
749 {
750 retval = __ia32_copy_pp_list(p->thread.ppl);
751 }
752 up_write(&current->mm->mmap_sem);
753 }
754
755 return retval;
756 }
757
758 static unsigned long
759 emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags,
760 loff_t off)
761 {
762 unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0;
763 struct inode *inode;
764 loff_t poff;
765
766 end = start + len;
767 pstart = PAGE_START(start);
768 pend = PAGE_ALIGN(end);
769
770 if (flags & MAP_FIXED) {
771 ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
772 if (start > pstart) {
773 if (flags & MAP_SHARED)
774 printk(KERN_INFO
775 "%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n",
776 current->comm, task_pid_nr(current), start);
777 ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags,
778 off);
779 if (IS_ERR((void *) ret))
780 return ret;
781 pstart += PAGE_SIZE;
782 if (pstart >= pend)
783 goto out; /* done */
784 }
785 if (end < pend) {
786 if (flags & MAP_SHARED)
787 printk(KERN_INFO
788 "%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n",
789 current->comm, task_pid_nr(current), end);
790 ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags,
791 (off + len) - offset_in_page(end));
792 if (IS_ERR((void *) ret))
793 return ret;
794 pend -= PAGE_SIZE;
795 if (pstart >= pend)
796 goto out; /* done */
797 }
798 } else {
799 /*
800 * If a start address was specified, use it if the entire rounded out area
801 * is available.
802 */
803 if (start && !pstart)
804 fudge = 1; /* handle case of mapping to range (0,PAGE_SIZE) */
805 tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags);
806 if (tmp != pstart) {
807 pstart = tmp;
808 start = pstart + offset_in_page(off); /* make start congruent with off */
809 end = start + len;
810 pend = PAGE_ALIGN(end);
811 }
812 }
813
814 poff = off + (pstart - start); /* note: (pstart - start) may be negative */
815 is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0);
816
817 if ((flags & MAP_SHARED) && !is_congruent)
818 printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap "
819 "(addr=0x%lx,off=0x%llx)\n", current->comm, task_pid_nr(current), start, off);
820
821 DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend,
822 is_congruent ? "congruent" : "not congruent", poff);
823
824 down_write(&current->mm->mmap_sem);
825 {
826 if (!(flags & MAP_ANONYMOUS) && is_congruent)
827 ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff);
828 else
829 ret = do_mmap(NULL, pstart, pend - pstart,
830 prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE),
831 flags | MAP_FIXED | MAP_ANONYMOUS, 0);
832 }
833 up_write(&current->mm->mmap_sem);
834
835 if (IS_ERR((void *) ret))
836 return ret;
837
838 if (!is_congruent) {
839 /* read the file contents */
840 inode = file->f_path.dentry->d_inode;
841 if (!inode->i_fop || !file->f_op->read
842 || ((*file->f_op->read)(file, (char __user *) pstart, pend - pstart, &poff)
843 < 0))
844 {
845 sys_munmap(pstart, pend - pstart);
846 return -EINVAL;
847 }
848 if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0)
849 return -EINVAL;
850 }
851
852 if (!(flags & MAP_FIXED))
853 ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
854 out:
855 return start;
856 }
857
858 #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
859
860 static inline unsigned int
861 get_prot32 (unsigned int prot)
862 {
863 if (prot & PROT_WRITE)
864 /* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */
865 prot |= PROT_READ | PROT_WRITE | PROT_EXEC;
866 else if (prot & (PROT_READ | PROT_EXEC))
867 /* on x86, there is no distinction between PROT_READ and PROT_EXEC */
868 prot |= (PROT_READ | PROT_EXEC);
869
870 return prot;
871 }
872
873 unsigned long
874 ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags,
875 loff_t offset)
876 {
877 DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n",
878 file, addr, len, prot, flags, offset);
879
880 if (file && (!file->f_op || !file->f_op->mmap))
881 return -ENODEV;
882
883 len = IA32_PAGE_ALIGN(len);
884 if (len == 0)
885 return addr;
886
887 if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len)
888 {
889 if (flags & MAP_FIXED)
890 return -ENOMEM;
891 else
892 return -EINVAL;
893 }
894
895 if (OFFSET4K(offset))
896 return -EINVAL;
897
898 prot = get_prot32(prot);
899
900 #if PAGE_SHIFT > IA32_PAGE_SHIFT
901 mutex_lock(&ia32_mmap_mutex);
902 {
903 addr = emulate_mmap(file, addr, len, prot, flags, offset);
904 }
905 mutex_unlock(&ia32_mmap_mutex);
906 #else
907 down_write(&current->mm->mmap_sem);
908 {
909 addr = do_mmap(file, addr, len, prot, flags, offset);
910 }
911 up_write(&current->mm->mmap_sem);
912 #endif
913 DBG("ia32_do_mmap: returning 0x%lx\n", addr);
914 return addr;
915 }
916
917 /*
918 * Linux/i386 didn't use to be able to handle more than 4 system call parameters, so these
919 * system calls used a memory block for parameter passing..
920 */
921
922 struct mmap_arg_struct {
923 unsigned int addr;
924 unsigned int len;
925 unsigned int prot;
926 unsigned int flags;
927 unsigned int fd;
928 unsigned int offset;
929 };
930
931 asmlinkage long
932 sys32_mmap (struct mmap_arg_struct __user *arg)
933 {
934 struct mmap_arg_struct a;
935 struct file *file = NULL;
936 unsigned long addr;
937 int flags;
938
939 if (copy_from_user(&a, arg, sizeof(a)))
940 return -EFAULT;
941
942 if (OFFSET4K(a.offset))
943 return -EINVAL;
944
945 flags = a.flags;
946
947 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
948 if (!(flags & MAP_ANONYMOUS)) {
949 file = fget(a.fd);
950 if (!file)
951 return -EBADF;
952 }
953
954 addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset);
955
956 if (file)
957 fput(file);
958 return addr;
959 }
960
961 asmlinkage long
962 sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags,
963 unsigned int fd, unsigned int pgoff)
964 {
965 struct file *file = NULL;
966 unsigned long retval;
967
968 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
969 if (!(flags & MAP_ANONYMOUS)) {
970 file = fget(fd);
971 if (!file)
972 return -EBADF;
973 }
974
975 retval = ia32_do_mmap(file, addr, len, prot, flags,
976 (unsigned long) pgoff << IA32_PAGE_SHIFT);
977
978 if (file)
979 fput(file);
980 return retval;
981 }
982
983 asmlinkage long
984 sys32_munmap (unsigned int start, unsigned int len)
985 {
986 unsigned int end = start + len;
987 long ret;
988
989 #if PAGE_SHIFT <= IA32_PAGE_SHIFT
990 ret = sys_munmap(start, end - start);
991 #else
992 if (OFFSET4K(start))
993 return -EINVAL;
994
995 end = IA32_PAGE_ALIGN(end);
996 if (start >= end)
997 return -EINVAL;
998
999 ret = ia32_unset_pp(&start, &end);
1000 if (ret < 0)
1001 return ret;
1002
1003 if (start >= end)
1004 return 0;
1005
1006 mutex_lock(&ia32_mmap_mutex);
1007 ret = sys_munmap(start, end - start);
1008 mutex_unlock(&ia32_mmap_mutex);
1009 #endif
1010 return ret;
1011 }
1012
1013 #if PAGE_SHIFT > IA32_PAGE_SHIFT
1014
1015 /*
1016 * When mprotect()ing a partial page, we set the permission to the union of the old
1017 * settings and the new settings. In other words, it's only possible to make access to a
1018 * partial page less restrictive.
1019 */
1020 static long
1021 mprotect_subpage (unsigned long address, int new_prot)
1022 {
1023 int old_prot;
1024 struct vm_area_struct *vma;
1025
1026 if (new_prot == PROT_NONE)
1027 return 0; /* optimize case where nothing changes... */
1028 vma = find_vma(current->mm, address);
1029 old_prot = get_page_prot(vma, address);
1030 return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot);
1031 }
1032
1033 #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
1034
1035 asmlinkage long
1036 sys32_mprotect (unsigned int start, unsigned int len, int prot)
1037 {
1038 unsigned int end = start + len;
1039 #if PAGE_SHIFT > IA32_PAGE_SHIFT
1040 long retval = 0;
1041 #endif
1042
1043 prot = get_prot32(prot);
1044
1045 #if PAGE_SHIFT <= IA32_PAGE_SHIFT
1046 return sys_mprotect(start, end - start, prot);
1047 #else
1048 if (OFFSET4K(start))
1049 return -EINVAL;
1050
1051 end = IA32_PAGE_ALIGN(end);
1052 if (end < start)
1053 return -EINVAL;
1054
1055 retval = ia32_compare_pp(&start, &end);
1056
1057 if (retval < 0)
1058 return retval;
1059
1060 mutex_lock(&ia32_mmap_mutex);
1061 {
1062 if (offset_in_page(start)) {
1063 /* start address is 4KB aligned but not page aligned. */
1064 retval = mprotect_subpage(PAGE_START(start), prot);
1065 if (retval < 0)
1066 goto out;
1067
1068 start = PAGE_ALIGN(start);
1069 if (start >= end)
1070 goto out; /* retval is already zero... */
1071 }
1072
1073 if (offset_in_page(end)) {
1074 /* end address is 4KB aligned but not page aligned. */
1075 retval = mprotect_subpage(PAGE_START(end), prot);
1076 if (retval < 0)
1077 goto out;
1078
1079 end = PAGE_START(end);
1080 }
1081 retval = sys_mprotect(start, end - start, prot);
1082 }
1083 out:
1084 mutex_unlock(&ia32_mmap_mutex);
1085 return retval;
1086 #endif
1087 }
1088
1089 asmlinkage long
1090 sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
1091 unsigned int flags, unsigned int new_addr)
1092 {
1093 long ret;
1094
1095 #if PAGE_SHIFT <= IA32_PAGE_SHIFT
1096 ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
1097 #else
1098 unsigned int old_end, new_end;
1099
1100 if (OFFSET4K(addr))
1101 return -EINVAL;
1102
1103 old_len = IA32_PAGE_ALIGN(old_len);
1104 new_len = IA32_PAGE_ALIGN(new_len);
1105 old_end = addr + old_len;
1106 new_end = addr + new_len;
1107
1108 if (!new_len)
1109 return -EINVAL;
1110
1111 if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr)))
1112 return -EINVAL;
1113
1114 if (old_len >= new_len) {
1115 ret = sys32_munmap(addr + new_len, old_len - new_len);
1116 if (ret && old_len != new_len)
1117 return ret;
1118 ret = addr;
1119 if (!(flags & MREMAP_FIXED) || (new_addr == addr))
1120 return ret;
1121 old_len = new_len;
1122 }
1123
1124 addr = PAGE_START(addr);
1125 old_len = PAGE_ALIGN(old_end) - addr;
1126 new_len = PAGE_ALIGN(new_end) - addr;
1127
1128 mutex_lock(&ia32_mmap_mutex);
1129 ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
1130 mutex_unlock(&ia32_mmap_mutex);
1131
1132 if ((ret >= 0) && (old_len < new_len)) {
1133 /* mremap expanded successfully */
1134 ia32_set_pp(old_end, new_end, flags);
1135 }
1136 #endif
1137 return ret;
1138 }
1139
1140 asmlinkage long
1141 sys32_pipe (int __user *fd)
1142 {
1143 int retval;
1144 int fds[2];
1145
1146 retval = do_pipe(fds);
1147 if (retval)
1148 goto out;
1149 if (copy_to_user(fd, fds, sizeof(fds)))
1150 retval = -EFAULT;
1151 out:
1152 return retval;
1153 }
1154
1155 static inline long
1156 get_tv32 (struct timeval *o, struct compat_timeval __user *i)
1157 {
1158 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
1159 (__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec)));
1160 }
1161
1162 static inline long
1163 put_tv32 (struct compat_timeval __user *o, struct timeval *i)
1164 {
1165 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
1166 (__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec)));
1167 }
1168
1169 asmlinkage unsigned long
1170 sys32_alarm (unsigned int seconds)
1171 {
1172 return alarm_setitimer(seconds);
1173 }
1174
1175 /* Translations due to time_t size differences. Which affects all
1176 sorts of things, like timeval and itimerval. */
1177
1178 extern struct timezone sys_tz;
1179
1180 asmlinkage long
1181 sys32_gettimeofday (struct compat_timeval __user *tv, struct timezone __user *tz)
1182 {
1183 if (tv) {
1184 struct timeval ktv;
1185 do_gettimeofday(&ktv);
1186 if (put_tv32(tv, &ktv))
1187 return -EFAULT;
1188 }
1189 if (tz) {
1190 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1191 return -EFAULT;
1192 }
1193 return 0;
1194 }
1195
1196 asmlinkage long
1197 sys32_settimeofday (struct compat_timeval __user *tv, struct timezone __user *tz)
1198 {
1199 struct timeval ktv;
1200 struct timespec kts;
1201 struct timezone ktz;
1202
1203 if (tv) {
1204 if (get_tv32(&ktv, tv))
1205 return -EFAULT;
1206 kts.tv_sec = ktv.tv_sec;
1207 kts.tv_nsec = ktv.tv_usec * 1000;
1208 }
1209 if (tz) {
1210 if (copy_from_user(&ktz, tz, sizeof(ktz)))
1211 return -EFAULT;
1212 }
1213
1214 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1215 }
1216
1217 struct getdents32_callback {
1218 struct compat_dirent __user *current_dir;
1219 struct compat_dirent __user *previous;
1220 int count;
1221 int error;
1222 };
1223
1224 struct readdir32_callback {
1225 struct old_linux32_dirent __user * dirent;
1226 int count;
1227 };
1228
1229 static int
1230 filldir32 (void *__buf, const char *name, int namlen, loff_t offset, u64 ino,
1231 unsigned int d_type)
1232 {
1233 struct compat_dirent __user * dirent;
1234 struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
1235 int reclen = ROUND_UP(offsetof(struct compat_dirent, d_name) + namlen + 1, 4);
1236 u32 d_ino;
1237
1238 buf->error = -EINVAL; /* only used if we fail.. */
1239 if (reclen > buf->count)
1240 return -EINVAL;
1241 d_ino = ino;
1242 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
1243 return -EOVERFLOW;
1244 buf->error = -EFAULT; /* only used if we fail.. */
1245 dirent = buf->previous;
1246 if (dirent)
1247 if (put_user(offset, &dirent->d_off))
1248 return -EFAULT;
1249 dirent = buf->current_dir;
1250 buf->previous = dirent;
1251 if (put_user(d_ino, &dirent->d_ino)
1252 || put_user(reclen, &dirent->d_reclen)
1253 || copy_to_user(dirent->d_name, name, namlen)
1254 || put_user(0, dirent->d_name + namlen))
1255 return -EFAULT;
1256 dirent = (struct compat_dirent __user *) ((char __user *) dirent + reclen);
1257 buf->current_dir = dirent;
1258 buf->count -= reclen;
1259 return 0;
1260 }
1261
1262 asmlinkage long
1263 sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned int count)
1264 {
1265 struct file * file;
1266 struct compat_dirent __user * lastdirent;
1267 struct getdents32_callback buf;
1268 int error;
1269
1270 error = -EFAULT;
1271 if (!access_ok(VERIFY_WRITE, dirent, count))
1272 goto out;
1273
1274 error = -EBADF;
1275 file = fget(fd);
1276 if (!file)
1277 goto out;
1278
1279 buf.current_dir = dirent;
1280 buf.previous = NULL;
1281 buf.count = count;
1282 buf.error = 0;
1283
1284 error = vfs_readdir(file, filldir32, &buf);
1285 if (error < 0)
1286 goto out_putf;
1287 error = buf.error;
1288 lastdirent = buf.previous;
1289 if (lastdirent) {
1290 if (put_user(file->f_pos, &lastdirent->d_off))
1291 error = -EFAULT;
1292 else
1293 error = count - buf.count;
1294 }
1295
1296 out_putf:
1297 fput(file);
1298 out:
1299 return error;
1300 }
1301
1302 static int
1303 fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, u64 ino,
1304 unsigned int d_type)
1305 {
1306 struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
1307 struct old_linux32_dirent __user * dirent;
1308 u32 d_ino;
1309
1310 if (buf->count)
1311 return -EINVAL;
1312 d_ino = ino;
1313 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
1314 return -EOVERFLOW;
1315 buf->count++;
1316 dirent = buf->dirent;
1317 if (put_user(d_ino, &dirent->d_ino)
1318 || put_user(offset, &dirent->d_offset)
1319 || put_user(namlen, &dirent->d_namlen)
1320 || copy_to_user(dirent->d_name, name, namlen)
1321 || put_user(0, dirent->d_name + namlen))
1322 return -EFAULT;
1323 return 0;
1324 }
1325
1326 asmlinkage long
1327 sys32_readdir (unsigned int fd, void __user *dirent, unsigned int count)
1328 {
1329 int error;
1330 struct file * file;
1331 struct readdir32_callback buf;
1332
1333 error = -EBADF;
1334 file = fget(fd);
1335 if (!file)
1336 goto out;
1337
1338 buf.count = 0;
1339 buf.dirent = dirent;
1340
1341 error = vfs_readdir(file, fillonedir32, &buf);
1342 if (error >= 0)
1343 error = buf.count;
1344 fput(file);
1345 out:
1346 return error;
1347 }
1348
1349 struct sel_arg_struct {
1350 unsigned int n;
1351 unsigned int inp;
1352 unsigned int outp;
1353 unsigned int exp;
1354 unsigned int tvp;
1355 };
1356
1357 asmlinkage long
1358 sys32_old_select (struct sel_arg_struct __user *arg)
1359 {
1360 struct sel_arg_struct a;
1361
1362 if (copy_from_user(&a, arg, sizeof(a)))
1363 return -EFAULT;
1364 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
1365 compat_ptr(a.exp), compat_ptr(a.tvp));
1366 }
1367
1368 #define SEMOP 1
1369 #define SEMGET 2
1370 #define SEMCTL 3
1371 #define SEMTIMEDOP 4
1372 #define MSGSND 11
1373 #define MSGRCV 12
1374 #define MSGGET 13
1375 #define MSGCTL 14
1376 #define SHMAT 21
1377 #define SHMDT 22
1378 #define SHMGET 23
1379 #define SHMCTL 24
1380
1381 asmlinkage long
1382 sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
1383 {
1384 int version;
1385
1386 version = call >> 16; /* hack for backward compatibility */
1387 call &= 0xffff;
1388
1389 switch (call) {
1390 case SEMTIMEDOP:
1391 if (fifth)
1392 return compat_sys_semtimedop(first, compat_ptr(ptr),
1393 second, compat_ptr(fifth));
1394 /* else fall through for normal semop() */
1395 case SEMOP:
1396 /* struct sembuf is the same on 32 and 64bit :)) */
1397 return sys_semtimedop(first, compat_ptr(ptr), second,
1398 NULL);
1399 case SEMGET:
1400 return sys_semget(first, second, third);
1401 case SEMCTL:
1402 return compat_sys_semctl(first, second, third, compat_ptr(ptr));
1403
1404 case MSGSND:
1405 return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
1406 case MSGRCV:
1407 return compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr));
1408 case MSGGET:
1409 return sys_msgget((key_t) first, second);
1410 case MSGCTL:
1411 return compat_sys_msgctl(first, second, compat_ptr(ptr));
1412
1413 case SHMAT:
1414 return compat_sys_shmat(first, second, third, version, compat_ptr(ptr));
1415 break;
1416 case SHMDT:
1417 return sys_shmdt(compat_ptr(ptr));
1418 case SHMGET:
1419 return sys_shmget(first, (unsigned)second, third);
1420 case SHMCTL:
1421 return compat_sys_shmctl(first, second, compat_ptr(ptr));
1422
1423 default:
1424 return -ENOSYS;
1425 }
1426 return -EINVAL;
1427 }
1428
1429 asmlinkage long
1430 compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options,
1431 struct compat_rusage *ru);
1432
1433 asmlinkage long
1434 sys32_waitpid (int pid, unsigned int *stat_addr, int options)
1435 {
1436 return compat_sys_wait4(pid, stat_addr, options, NULL);
1437 }
1438
1439 static unsigned int
1440 ia32_peek (struct task_struct *child, unsigned long addr, unsigned int *val)
1441 {
1442 size_t copied;
1443 unsigned int ret;
1444
1445 copied = access_process_vm(child, addr, val, sizeof(*val), 0);
1446 return (copied != sizeof(ret)) ? -EIO : 0;
1447 }
1448
1449 static unsigned int
1450 ia32_poke (struct task_struct *child, unsigned long addr, unsigned int val)
1451 {
1452
1453 if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val))
1454 return -EIO;
1455 return 0;
1456 }
1457
1458 /*
1459 * The order in which registers are stored in the ptrace regs structure
1460 */
1461 #define PT_EBX 0
1462 #define PT_ECX 1
1463 #define PT_EDX 2
1464 #define PT_ESI 3
1465 #define PT_EDI 4
1466 #define PT_EBP 5
1467 #define PT_EAX 6
1468 #define PT_DS 7
1469 #define PT_ES 8
1470 #define PT_FS 9
1471 #define PT_GS 10
1472 #define PT_ORIG_EAX 11
1473 #define PT_EIP 12
1474 #define PT_CS 13
1475 #define PT_EFL 14
1476 #define PT_UESP 15
1477 #define PT_SS 16
1478
1479 static unsigned int
1480 getreg (struct task_struct *child, int regno)
1481 {
1482 struct pt_regs *child_regs;
1483
1484 child_regs = task_pt_regs(child);
1485 switch (regno / sizeof(int)) {
1486 case PT_EBX: return child_regs->r11;
1487 case PT_ECX: return child_regs->r9;
1488 case PT_EDX: return child_regs->r10;
1489 case PT_ESI: return child_regs->r14;
1490 case PT_EDI: return child_regs->r15;
1491 case PT_EBP: return child_regs->r13;
1492 case PT_EAX: return child_regs->r8;
1493 case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */
1494 case PT_EIP: return child_regs->cr_iip;
1495 case PT_UESP: return child_regs->r12;
1496 case PT_EFL: return child->thread.eflag;
1497 case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
1498 return __USER_DS;
1499 case PT_CS: return __USER_CS;
1500 default:
1501 printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno);
1502 break;
1503 }
1504 return 0;
1505 }
1506
1507 static void
1508 putreg (struct task_struct *child, int regno, unsigned int value)
1509 {
1510 struct pt_regs *child_regs;
1511
1512 child_regs = task_pt_regs(child);
1513 switch (regno / sizeof(int)) {
1514 case PT_EBX: child_regs->r11 = value; break;
1515 case PT_ECX: child_regs->r9 = value; break;
1516 case PT_EDX: child_regs->r10 = value; break;
1517 case PT_ESI: child_regs->r14 = value; break;
1518 case PT_EDI: child_regs->r15 = value; break;
1519 case PT_EBP: child_regs->r13 = value; break;
1520 case PT_EAX: child_regs->r8 = value; break;
1521 case PT_ORIG_EAX: child_regs->r1 = value; break;
1522 case PT_EIP: child_regs->cr_iip = value; break;
1523 case PT_UESP: child_regs->r12 = value; break;
1524 case PT_EFL: child->thread.eflag = value; break;
1525 case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
1526 if (value != __USER_DS)
1527 printk(KERN_ERR
1528 "ia32.putreg: attempt to set invalid segment register %d = %x\n",
1529 regno, value);
1530 break;
1531 case PT_CS:
1532 if (value != __USER_CS)
1533 printk(KERN_ERR
1534 "ia32.putreg: attempt to to set invalid segment register %d = %x\n",
1535 regno, value);
1536 break;
1537 default:
1538 printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno);
1539 break;
1540 }
1541 }
1542
1543 static void
1544 put_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
1545 struct switch_stack *swp, int tos)
1546 {
1547 struct _fpreg_ia32 *f;
1548 char buf[32];
1549
1550 f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
1551 if ((regno += tos) >= 8)
1552 regno -= 8;
1553 switch (regno) {
1554 case 0:
1555 ia64f2ia32f(f, &ptp->f8);
1556 break;
1557 case 1:
1558 ia64f2ia32f(f, &ptp->f9);
1559 break;
1560 case 2:
1561 ia64f2ia32f(f, &ptp->f10);
1562 break;
1563 case 3:
1564 ia64f2ia32f(f, &ptp->f11);
1565 break;
1566 case 4:
1567 case 5:
1568 case 6:
1569 case 7:
1570 ia64f2ia32f(f, &swp->f12 + (regno - 4));
1571 break;
1572 }
1573 copy_to_user(reg, f, sizeof(*reg));
1574 }
1575
1576 static void
1577 get_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
1578 struct switch_stack *swp, int tos)
1579 {
1580
1581 if ((regno += tos) >= 8)
1582 regno -= 8;
1583 switch (regno) {
1584 case 0:
1585 copy_from_user(&ptp->f8, reg, sizeof(*reg));
1586 break;
1587 case 1:
1588 copy_from_user(&ptp->f9, reg, sizeof(*reg));
1589 break;
1590 case 2:
1591 copy_from_user(&ptp->f10, reg, sizeof(*reg));
1592 break;
1593 case 3:
1594 copy_from_user(&ptp->f11, reg, sizeof(*reg));
1595 break;
1596 case 4:
1597 case 5:
1598 case 6:
1599 case 7:
1600 copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg));
1601 break;
1602 }
1603 return;
1604 }
1605
1606 int
1607 save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
1608 {
1609 struct switch_stack *swp;
1610 struct pt_regs *ptp;
1611 int i, tos;
1612
1613 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
1614 return -EFAULT;
1615
1616 __put_user(tsk->thread.fcr & 0xffff, &save->cwd);
1617 __put_user(tsk->thread.fsr & 0xffff, &save->swd);
1618 __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
1619 __put_user(tsk->thread.fir, &save->fip);
1620 __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
1621 __put_user(tsk->thread.fdr, &save->foo);
1622 __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
1623
1624 /*
1625 * Stack frames start with 16-bytes of temp space
1626 */
1627 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1628 ptp = task_pt_regs(tsk);
1629 tos = (tsk->thread.fsr >> 11) & 7;
1630 for (i = 0; i < 8; i++)
1631 put_fpreg(i, &save->st_space[i], ptp, swp, tos);
1632 return 0;
1633 }
1634
1635 static int
1636 restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
1637 {
1638 struct switch_stack *swp;
1639 struct pt_regs *ptp;
1640 int i, tos;
1641 unsigned int fsrlo, fsrhi, num32;
1642
1643 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
1644 return(-EFAULT);
1645
1646 __get_user(num32, (unsigned int __user *)&save->cwd);
1647 tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
1648 __get_user(fsrlo, (unsigned int __user *)&save->swd);
1649 __get_user(fsrhi, (unsigned int __user *)&save->twd);
1650 num32 = (fsrhi << 16) | fsrlo;
1651 tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
1652 __get_user(num32, (unsigned int __user *)&save->fip);
1653 tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
1654 __get_user(num32, (unsigned int __user *)&save->foo);
1655 tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
1656
1657 /*
1658 * Stack frames start with 16-bytes of temp space
1659 */
1660 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1661 ptp = task_pt_regs(tsk);
1662 tos = (tsk->thread.fsr >> 11) & 7;
1663 for (i = 0; i < 8; i++)
1664 get_fpreg(i, &save->st_space[i], ptp, swp, tos);
1665 return 0;
1666 }
1667
1668 int
1669 save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
1670 {
1671 struct switch_stack *swp;
1672 struct pt_regs *ptp;
1673 int i, tos;
1674 unsigned long mxcsr=0;
1675 unsigned long num128[2];
1676
1677 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
1678 return -EFAULT;
1679
1680 __put_user(tsk->thread.fcr & 0xffff, &save->cwd);
1681 __put_user(tsk->thread.fsr & 0xffff, &save->swd);
1682 __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
1683 __put_user(tsk->thread.fir, &save->fip);
1684 __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
1685 __put_user(tsk->thread.fdr, &save->foo);
1686 __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
1687
1688 /*
1689 * Stack frames start with 16-bytes of temp space
1690 */
1691 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1692 ptp = task_pt_regs(tsk);
1693 tos = (tsk->thread.fsr >> 11) & 7;
1694 for (i = 0; i < 8; i++)
1695 put_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
1696
1697 mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f);
1698 __put_user(mxcsr & 0xffff, &save->mxcsr);
1699 for (i = 0; i < 8; i++) {
1700 memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long));
1701 memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long));
1702 copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32));
1703 }
1704 return 0;
1705 }
1706
1707 static int
1708 restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
1709 {
1710 struct switch_stack *swp;
1711 struct pt_regs *ptp;
1712 int i, tos;
1713 unsigned int fsrlo, fsrhi, num32;
1714 int mxcsr;
1715 unsigned long num64;
1716 unsigned long num128[2];
1717
1718 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
1719 return(-EFAULT);
1720
1721 __get_user(num32, (unsigned int __user *)&save->cwd);
1722 tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
1723 __get_user(fsrlo, (unsigned int __user *)&save->swd);
1724 __get_user(fsrhi, (unsigned int __user *)&save->twd);
1725 num32 = (fsrhi << 16) | fsrlo;
1726 tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
1727 __get_user(num32, (unsigned int __user *)&save->fip);
1728 tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
1729 __get_user(num32, (unsigned int __user *)&save->foo);
1730 tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
1731
1732 /*
1733 * Stack frames start with 16-bytes of temp space
1734 */
1735 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1736 ptp = task_pt_regs(tsk);
1737 tos = (tsk->thread.fsr >> 11) & 7;
1738 for (i = 0; i < 8; i++)
1739 get_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
1740
1741 __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
1742 num64 = mxcsr & 0xff10;
1743 tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000UL)) | (num64<<32);
1744 num64 = mxcsr & 0x3f;
1745 tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000UL)) | (num64<<32);
1746
1747 for (i = 0; i < 8; i++) {
1748 copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32));
1749 memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long));
1750 memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long));
1751 }
1752 return 0;
1753 }
1754
1755 asmlinkage long
1756 sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
1757 {
1758 struct task_struct *child;
1759 unsigned int value, tmp;
1760 long i, ret;
1761
1762 lock_kernel();
1763 if (request == PTRACE_TRACEME) {
1764 ret = ptrace_traceme();
1765 goto out;
1766 }
1767
1768 child = ptrace_get_task_struct(pid);
1769 if (IS_ERR(child)) {
1770 ret = PTR_ERR(child);
1771 goto out;
1772 }
1773
1774 if (request == PTRACE_ATTACH) {
1775 ret = sys_ptrace(request, pid, addr, data);
1776 goto out_tsk;
1777 }
1778
1779 ret = ptrace_check_attach(child, request == PTRACE_KILL);
1780 if (ret < 0)
1781 goto out_tsk;
1782
1783 switch (request) {
1784 case PTRACE_PEEKTEXT:
1785 case PTRACE_PEEKDATA: /* read word at location addr */
1786 ret = ia32_peek(child, addr, &value);
1787 if (ret == 0)
1788 ret = put_user(value, (unsigned int __user *) compat_ptr(data));
1789 else
1790 ret = -EIO;
1791 goto out_tsk;
1792
1793 case PTRACE_POKETEXT:
1794 case PTRACE_POKEDATA: /* write the word at location addr */
1795 ret = ia32_poke(child, addr, data);
1796 goto out_tsk;
1797
1798 case PTRACE_PEEKUSR: /* read word at addr in USER area */
1799 ret = -EIO;
1800 if ((addr & 3) || addr > 17*sizeof(int))
1801 break;
1802
1803 tmp = getreg(child, addr);
1804 if (!put_user(tmp, (unsigned int __user *) compat_ptr(data)))
1805 ret = 0;
1806 break;
1807
1808 case PTRACE_POKEUSR: /* write word at addr in USER area */
1809 ret = -EIO;
1810 if ((addr & 3) || addr > 17*sizeof(int))
1811 break;
1812
1813 putreg(child, addr, data);
1814 ret = 0;
1815 break;
1816
1817 case IA32_PTRACE_GETREGS:
1818 if (!access_ok(VERIFY_WRITE, compat_ptr(data), 17*sizeof(int))) {
1819 ret = -EIO;
1820 break;
1821 }
1822 for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
1823 put_user(getreg(child, i), (unsigned int __user *) compat_ptr(data));
1824 data += sizeof(int);
1825 }
1826 ret = 0;
1827 break;
1828
1829 case IA32_PTRACE_SETREGS:
1830 if (!access_ok(VERIFY_READ, compat_ptr(data), 17*sizeof(int))) {
1831 ret = -EIO;
1832 break;
1833 }
1834 for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
1835 get_user(tmp, (unsigned int __user *) compat_ptr(data));
1836 putreg(child, i, tmp);
1837 data += sizeof(int);
1838 }
1839 ret = 0;
1840 break;
1841
1842 case IA32_PTRACE_GETFPREGS:
1843 ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
1844 compat_ptr(data));
1845 break;
1846
1847 case IA32_PTRACE_GETFPXREGS:
1848 ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
1849 compat_ptr(data));
1850 break;
1851
1852 case IA32_PTRACE_SETFPREGS:
1853 ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
1854 compat_ptr(data));
1855 break;
1856
1857 case IA32_PTRACE_SETFPXREGS:
1858 ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
1859 compat_ptr(data));
1860 break;
1861
1862 case PTRACE_GETEVENTMSG:
1863 ret = put_user(child->ptrace_message, (unsigned int __user *) compat_ptr(data));
1864 break;
1865
1866 case PTRACE_SYSCALL: /* continue, stop after next syscall */
1867 case PTRACE_CONT: /* restart after signal. */
1868 case PTRACE_KILL:
1869 case PTRACE_SINGLESTEP: /* execute chile for one instruction */
1870 case PTRACE_DETACH: /* detach a process */
1871 ret = sys_ptrace(request, pid, addr, data);
1872 break;
1873
1874 default:
1875 ret = ptrace_request(child, request, addr, data);
1876 break;
1877
1878 }
1879 out_tsk:
1880 put_task_struct(child);
1881 out:
1882 unlock_kernel();
1883 return ret;
1884 }
1885
1886 typedef struct {
1887 unsigned int ss_sp;
1888 unsigned int ss_flags;
1889 unsigned int ss_size;
1890 } ia32_stack_t;
1891
1892 asmlinkage long
1893 sys32_sigaltstack (ia32_stack_t __user *uss32, ia32_stack_t __user *uoss32,
1894 long arg2, long arg3, long arg4, long arg5, long arg6,
1895 long arg7, struct pt_regs pt)
1896 {
1897 stack_t uss, uoss;
1898 ia32_stack_t buf32;
1899 int ret;
1900 mm_segment_t old_fs = get_fs();
1901
1902 if (uss32) {
1903 if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t)))
1904 return -EFAULT;
1905 uss.ss_sp = (void __user *) (long) buf32.ss_sp;
1906 uss.ss_flags = buf32.ss_flags;
1907 /* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the
1908 check and set it to the user requested value later */
1909 if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) {
1910 ret = -ENOMEM;
1911 goto out;
1912 }
1913 uss.ss_size = MINSIGSTKSZ;
1914 }
1915 set_fs(KERNEL_DS);
1916 ret = do_sigaltstack(uss32 ? (stack_t __user *) &uss : NULL,
1917 (stack_t __user *) &uoss, pt.r12);
1918 current->sas_ss_size = buf32.ss_size;
1919 set_fs(old_fs);
1920 out:
1921 if (ret < 0)
1922 return(ret);
1923 if (uoss32) {
1924 buf32.ss_sp = (long __user) uoss.ss_sp;
1925 buf32.ss_flags = uoss.ss_flags;
1926 buf32.ss_size = uoss.ss_size;
1927 if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t)))
1928 return -EFAULT;
1929 }
1930 return ret;
1931 }
1932
1933 asmlinkage int
1934 sys32_pause (void)
1935 {
1936 current->state = TASK_INTERRUPTIBLE;
1937 schedule();
1938 return -ERESTARTNOHAND;
1939 }
1940
1941 asmlinkage int
1942 sys32_msync (unsigned int start, unsigned int len, int flags)
1943 {
1944 unsigned int addr;
1945
1946 if (OFFSET4K(start))
1947 return -EINVAL;
1948 addr = PAGE_START(start);
1949 return sys_msync(addr, len + (start - addr), flags);
1950 }
1951
1952 struct sysctl32 {
1953 unsigned int name;
1954 int nlen;
1955 unsigned int oldval;
1956 unsigned int oldlenp;
1957 unsigned int newval;
1958 unsigned int newlen;
1959 unsigned int __unused[4];
1960 };
1961
1962 #ifdef CONFIG_SYSCTL_SYSCALL
1963 asmlinkage long
1964 sys32_sysctl (struct sysctl32 __user *args)
1965 {
1966 struct sysctl32 a32;
1967 mm_segment_t old_fs = get_fs ();
1968 void __user *oldvalp, *newvalp;
1969 size_t oldlen;
1970 int __user *namep;
1971 long ret;
1972
1973 if (copy_from_user(&a32, args, sizeof(a32)))
1974 return -EFAULT;
1975
1976 /*
1977 * We need to pre-validate these because we have to disable address checking
1978 * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
1979 * user specifying bad addresses here. Well, since we're dealing with 32 bit
1980 * addresses, we KNOW that access_ok() will always succeed, so this is an
1981 * expensive NOP, but so what...
1982 */
1983 namep = (int __user *) compat_ptr(a32.name);
1984 oldvalp = compat_ptr(a32.oldval);
1985 newvalp = compat_ptr(a32.newval);
1986
1987 if ((oldvalp && get_user(oldlen, (int __user *) compat_ptr(a32.oldlenp)))
1988 || !access_ok(VERIFY_WRITE, namep, 0)
1989 || !access_ok(VERIFY_WRITE, oldvalp, 0)
1990 || !access_ok(VERIFY_WRITE, newvalp, 0))
1991 return -EFAULT;
1992
1993 set_fs(KERNEL_DS);
1994 lock_kernel();
1995 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *) &oldlen,
1996 newvalp, (size_t) a32.newlen);
1997 unlock_kernel();
1998 set_fs(old_fs);
1999
2000 if (oldvalp && put_user (oldlen, (int __user *) compat_ptr(a32.oldlenp)))
2001 return -EFAULT;
2002
2003 return ret;
2004 }
2005 #endif
2006
2007 asmlinkage long
2008 sys32_newuname (struct new_utsname __user *name)
2009 {
2010 int ret = sys_newuname(name);
2011
2012 if (!ret)
2013 if (copy_to_user(name->machine, "i686\0\0\0", 8))
2014 ret = -EFAULT;
2015 return ret;
2016 }
2017
2018 asmlinkage long
2019 sys32_getresuid16 (u16 __user *ruid, u16 __user *euid, u16 __user *suid)
2020 {
2021 uid_t a, b, c;
2022 int ret;
2023 mm_segment_t old_fs = get_fs();
2024
2025 set_fs(KERNEL_DS);
2026 ret = sys_getresuid((uid_t __user *) &a, (uid_t __user *) &b, (uid_t __user *) &c);
2027 set_fs(old_fs);
2028
2029 if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid))
2030 return -EFAULT;
2031 return ret;
2032 }
2033
2034 asmlinkage long
2035 sys32_getresgid16 (u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
2036 {
2037 gid_t a, b, c;
2038 int ret;
2039 mm_segment_t old_fs = get_fs();
2040
2041 set_fs(KERNEL_DS);
2042 ret = sys_getresgid((gid_t __user *) &a, (gid_t __user *) &b, (gid_t __user *) &c);
2043 set_fs(old_fs);
2044
2045 if (ret)
2046 return ret;
2047
2048 return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid);
2049 }
2050
2051 asmlinkage long
2052 sys32_lseek (unsigned int fd, int offset, unsigned int whence)
2053 {
2054 /* Sign-extension of "offset" is important here... */
2055 return sys_lseek(fd, offset, whence);
2056 }
2057
2058 static int
2059 groups16_to_user(short __user *grouplist, struct group_info *group_info)
2060 {
2061 int i;
2062 short group;
2063
2064 for (i = 0; i < group_info->ngroups; i++) {
2065 group = (short)GROUP_AT(group_info, i);
2066 if (put_user(group, grouplist+i))
2067 return -EFAULT;
2068 }
2069
2070 return 0;
2071 }
2072
2073 static int
2074 groups16_from_user(struct group_info *group_info, short __user *grouplist)
2075 {
2076 int i;
2077 short group;
2078
2079 for (i = 0; i < group_info->ngroups; i++) {
2080 if (get_user(group, grouplist+i))
2081 return -EFAULT;
2082 GROUP_AT(group_info, i) = (gid_t)group;
2083 }
2084
2085 return 0;
2086 }
2087
2088 asmlinkage long
2089 sys32_getgroups16 (int gidsetsize, short __user *grouplist)
2090 {
2091 int i;
2092
2093 if (gidsetsize < 0)
2094 return -EINVAL;
2095
2096 get_group_info(current->group_info);
2097 i = current->group_info->ngroups;
2098 if (gidsetsize) {
2099 if (i > gidsetsize) {
2100 i = -EINVAL;
2101 goto out;
2102 }
2103 if (groups16_to_user(grouplist, current->group_info)) {
2104 i = -EFAULT;
2105 goto out;
2106 }
2107 }
2108 out:
2109 put_group_info(current->group_info);
2110 return i;
2111 }
2112
2113 asmlinkage long
2114 sys32_setgroups16 (int gidsetsize, short __user *grouplist)
2115 {
2116 struct group_info *group_info;
2117 int retval;
2118
2119 if (!capable(CAP_SETGID))
2120 return -EPERM;
2121 if ((unsigned)gidsetsize > NGROUPS_MAX)
2122 return -EINVAL;
2123
2124 group_info = groups_alloc(gidsetsize);
2125 if (!group_info)
2126 return -ENOMEM;
2127 retval = groups16_from_user(group_info, grouplist);
2128 if (retval) {
2129 put_group_info(group_info);
2130 return retval;
2131 }
2132
2133 retval = set_current_groups(group_info);
2134 put_group_info(group_info);
2135
2136 return retval;
2137 }
2138
2139 asmlinkage long
2140 sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi)
2141 {
2142 return sys_truncate(compat_ptr(path), ((unsigned long) len_hi << 32) | len_lo);
2143 }
2144
2145 asmlinkage long
2146 sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi)
2147 {
2148 return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo);
2149 }
2150
2151 static int
2152 putstat64 (struct stat64 __user *ubuf, struct kstat *kbuf)
2153 {
2154 int err;
2155 u64 hdev;
2156
2157 if (clear_user(ubuf, sizeof(*ubuf)))
2158 return -EFAULT;
2159
2160 hdev = huge_encode_dev(kbuf->dev);
2161 err = __put_user(hdev, (u32 __user*)&ubuf->st_dev);
2162 err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_dev) + 1);
2163 err |= __put_user(kbuf->ino, &ubuf->__st_ino);
2164 err |= __put_user(kbuf->ino, &ubuf->st_ino_lo);
2165 err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi);
2166 err |= __put_user(kbuf->mode, &ubuf->st_mode);
2167 err |= __put_user(kbuf->nlink, &ubuf->st_nlink);
2168 err |= __put_user(kbuf->uid, &ubuf->st_uid);
2169 err |= __put_user(kbuf->gid, &ubuf->st_gid);
2170 hdev = huge_encode_dev(kbuf->rdev);
2171 err = __put_user(hdev, (u32 __user*)&ubuf->st_rdev);
2172 err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_rdev) + 1);
2173 err |= __put_user(kbuf->size, &ubuf->st_size_lo);
2174 err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi);
2175 err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime);
2176 err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec);
2177 err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime);
2178 err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec);
2179 err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime);
2180 err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec);
2181 err |= __put_user(kbuf->blksize, &ubuf->st_blksize);
2182 err |= __put_user(kbuf->blocks, &ubuf->st_blocks);
2183 return err;
2184 }
2185
2186 asmlinkage long
2187 sys32_stat64 (char __user *filename, struct stat64 __user *statbuf)
2188 {
2189 struct kstat s;
2190 long ret = vfs_stat(filename, &s);
2191 if (!ret)
2192 ret = putstat64(statbuf, &s);
2193 return ret;
2194 }
2195
2196 asmlinkage long
2197 sys32_lstat64 (char __user *filename, struct stat64 __user *statbuf)
2198 {
2199 struct kstat s;
2200 long ret = vfs_lstat(filename, &s);
2201 if (!ret)
2202 ret = putstat64(statbuf, &s);
2203 return ret;
2204 }
2205
2206 asmlinkage long
2207 sys32_fstat64 (unsigned int fd, struct stat64 __user *statbuf)
2208 {
2209 struct kstat s;
2210 long ret = vfs_fstat(fd, &s);
2211 if (!ret)
2212 ret = putstat64(statbuf, &s);
2213 return ret;
2214 }
2215
2216 asmlinkage long
2217 sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec __user *interval)
2218 {
2219 mm_segment_t old_fs = get_fs();
2220 struct timespec t;
2221 long ret;
2222
2223 set_fs(KERNEL_DS);
2224 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
2225 set_fs(old_fs);
2226 if (put_compat_timespec(&t, interval))
2227 return -EFAULT;
2228 return ret;
2229 }
2230
2231 asmlinkage long
2232 sys32_pread (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
2233 {
2234 return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
2235 }
2236
2237 asmlinkage long
2238 sys32_pwrite (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
2239 {
2240 return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
2241 }
2242
2243 asmlinkage long
2244 sys32_sendfile (int out_fd, int in_fd, int __user *offset, unsigned int count)
2245 {
2246 mm_segment_t old_fs = get_fs();
2247 long ret;
2248 off_t of;
2249
2250 if (offset && get_user(of, offset))
2251 return -EFAULT;
2252
2253 set_fs(KERNEL_DS);
2254 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *) &of : NULL, count);
2255 set_fs(old_fs);
2256
2257 if (offset && put_user(of, offset))
2258 return -EFAULT;
2259
2260 return ret;
2261 }
2262
2263 asmlinkage long
2264 sys32_personality (unsigned int personality)
2265 {
2266 long ret;
2267
2268 if (current->personality == PER_LINUX32 && personality == PER_LINUX)
2269 personality = PER_LINUX32;
2270 ret = sys_personality(personality);
2271 if (ret == PER_LINUX32)
2272 ret = PER_LINUX;
2273 return ret;
2274 }
2275
2276 asmlinkage unsigned long
2277 sys32_brk (unsigned int brk)
2278 {
2279 unsigned long ret, obrk;
2280 struct mm_struct *mm = current->mm;
2281
2282 obrk = mm->brk;
2283 ret = sys_brk(brk);
2284 if (ret < obrk)
2285 clear_user(compat_ptr(ret), PAGE_ALIGN(ret) - ret);
2286 return ret;
2287 }
2288
2289 /* Structure for ia32 emulation on ia64 */
2290 struct epoll_event32
2291 {
2292 u32 events;
2293 u32 data[2];
2294 };
2295
2296 asmlinkage long
2297 sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 __user *event)
2298 {
2299 mm_segment_t old_fs = get_fs();
2300 struct epoll_event event64;
2301 int error;
2302 u32 data_halfword;
2303
2304 if (!access_ok(VERIFY_READ, event, sizeof(struct epoll_event32)))
2305 return -EFAULT;
2306
2307 __get_user(event64.events, &event->events);
2308 __get_user(data_halfword, &event->data[0]);
2309 event64.data = data_halfword;
2310 __get_user(data_halfword, &event->data[1]);
2311 event64.data |= (u64)data_halfword << 32;
2312
2313 set_fs(KERNEL_DS);
2314 error = sys_epoll_ctl(epfd, op, fd, (struct epoll_event __user *) &event64);
2315 set_fs(old_fs);
2316
2317 return error;
2318 }
2319
2320 asmlinkage long
2321 sys32_epoll_wait(int epfd, struct epoll_event32 __user * events, int maxevents,
2322 int timeout)
2323 {
2324 struct epoll_event *events64 = NULL;
2325 mm_segment_t old_fs = get_fs();
2326 int numevents, size;
2327 int evt_idx;
2328 int do_free_pages = 0;
2329
2330 if (maxevents <= 0) {
2331 return -EINVAL;
2332 }
2333
2334 /* Verify that the area passed by the user is writeable */
2335 if (!access_ok(VERIFY_WRITE, events, maxevents * sizeof(struct epoll_event32)))
2336 return -EFAULT;
2337
2338 /*
2339 * Allocate space for the intermediate copy. If the space needed
2340 * is large enough to cause kmalloc to fail, then try again with
2341 * __get_free_pages.
2342 */
2343 size = maxevents * sizeof(struct epoll_event);
2344 events64 = kmalloc(size, GFP_KERNEL);
2345 if (events64 == NULL) {
2346 events64 = (struct epoll_event *)
2347 __get_free_pages(GFP_KERNEL, get_order(size));
2348 if (events64 == NULL)
2349 return -ENOMEM;
2350 do_free_pages = 1;
2351 }
2352
2353 /* Do the system call */
2354 set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/
2355 numevents = sys_epoll_wait(epfd, (struct epoll_event __user *) events64,
2356 maxevents, timeout);
2357 set_fs(old_fs);
2358
2359 /* Don't modify userspace memory if we're returning an error */
2360 if (numevents > 0) {
2361 /* Translate the 64-bit structures back into the 32-bit
2362 structures */
2363 for (evt_idx = 0; evt_idx < numevents; evt_idx++) {
2364 __put_user(events64[evt_idx].events,
2365 &events[evt_idx].events);
2366 __put_user((u32)events64[evt_idx].data,
2367 &events[evt_idx].data[0]);
2368 __put_user((u32)(events64[evt_idx].data >> 32),
2369 &events[evt_idx].data[1]);
2370 }
2371 }
2372
2373 if (do_free_pages)
2374 free_pages((unsigned long) events64, get_order(size));
2375 else
2376 kfree(events64);
2377 return numevents;
2378 }
2379
2380 /*
2381 * Get a yet unused TLS descriptor index.
2382 */
2383 static int
2384 get_free_idx (void)
2385 {
2386 struct thread_struct *t = &current->thread;
2387 int idx;
2388
2389 for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
2390 if (desc_empty(t->tls_array + idx))
2391 return idx + GDT_ENTRY_TLS_MIN;
2392 return -ESRCH;
2393 }
2394
2395 /*
2396 * Set a given TLS descriptor:
2397 */
2398 asmlinkage int
2399 sys32_set_thread_area (struct ia32_user_desc __user *u_info)
2400 {
2401 struct thread_struct *t = &current->thread;
2402 struct ia32_user_desc info;
2403 struct desc_struct *desc;
2404 int cpu, idx;
2405
2406 if (copy_from_user(&info, u_info, sizeof(info)))
2407 return -EFAULT;
2408 idx = info.entry_number;
2409
2410 /*
2411 * index -1 means the kernel should try to find and allocate an empty descriptor:
2412 */
2413 if (idx == -1) {
2414 idx = get_free_idx();
2415 if (idx < 0)
2416 return idx;
2417 if (put_user(idx, &u_info->entry_number))
2418 return -EFAULT;
2419 }
2420
2421 if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
2422 return -EINVAL;
2423
2424 desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
2425
2426 cpu = smp_processor_id();
2427
2428 if (LDT_empty(&info)) {
2429 desc->a = 0;
2430 desc->b = 0;
2431 } else {
2432 desc->a = LDT_entry_a(&info);
2433 desc->b = LDT_entry_b(&info);
2434 }
2435 load_TLS(t, cpu);
2436 return 0;
2437 }
2438
2439 /*
2440 * Get the current Thread-Local Storage area:
2441 */
2442
2443 #define GET_BASE(desc) ( \
2444 (((desc)->a >> 16) & 0x0000ffff) | \
2445 (((desc)->b << 16) & 0x00ff0000) | \
2446 ( (desc)->b & 0xff000000) )
2447
2448 #define GET_LIMIT(desc) ( \
2449 ((desc)->a & 0x0ffff) | \
2450 ((desc)->b & 0xf0000) )
2451
2452 #define GET_32BIT(desc) (((desc)->b >> 22) & 1)
2453 #define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
2454 #define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
2455 #define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
2456 #define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
2457 #define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
2458
2459 asmlinkage int
2460 sys32_get_thread_area (struct ia32_user_desc __user *u_info)
2461 {
2462 struct ia32_user_desc info;
2463 struct desc_struct *desc;
2464 int idx;
2465
2466 if (get_user(idx, &u_info->entry_number))
2467 return -EFAULT;
2468 if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
2469 return -EINVAL;
2470
2471 desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
2472
2473 info.entry_number = idx;
2474 info.base_addr = GET_BASE(desc);
2475 info.limit = GET_LIMIT(desc);
2476 info.seg_32bit = GET_32BIT(desc);
2477 info.contents = GET_CONTENTS(desc);
2478 info.read_exec_only = !GET_WRITABLE(desc);
2479 info.limit_in_pages = GET_LIMIT_PAGES(desc);
2480 info.seg_not_present = !GET_PRESENT(desc);
2481 info.useable = GET_USEABLE(desc);
2482
2483 if (copy_to_user(u_info, &info, sizeof(info)))
2484 return -EFAULT;
2485 return 0;
2486 }
2487
2488 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
2489 __u32 len_low, __u32 len_high, int advice)
2490 {
2491 return sys_fadvise64_64(fd,
2492 (((u64)offset_high)<<32) | offset_low,
2493 (((u64)len_high)<<32) | len_low,
2494 advice);
2495 }
2496
2497 #ifdef NOTYET /* UNTESTED FOR IA64 FROM HERE DOWN */
2498
2499 asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid)
2500 {
2501 uid_t sruid, seuid;
2502
2503 sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
2504 seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
2505 return sys_setreuid(sruid, seuid);
2506 }
2507
2508 asmlinkage long
2509 sys32_setresuid(compat_uid_t ruid, compat_uid_t euid,
2510 compat_uid_t suid)
2511 {
2512 uid_t sruid, seuid, ssuid;
2513
2514 sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
2515 seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
2516 ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid);
2517 return sys_setresuid(sruid, seuid, ssuid);
2518 }
2519
2520 asmlinkage long
2521 sys32_setregid(compat_gid_t rgid, compat_gid_t egid)
2522 {
2523 gid_t srgid, segid;
2524
2525 srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
2526 segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
2527 return sys_setregid(srgid, segid);
2528 }
2529
2530 asmlinkage long
2531 sys32_setresgid(compat_gid_t rgid, compat_gid_t egid,
2532 compat_gid_t sgid)
2533 {
2534 gid_t srgid, segid, ssgid;
2535
2536 srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
2537 segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
2538 ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid);
2539 return sys_setresgid(srgid, segid, ssgid);
2540 }
2541 #endif /* NOTYET */
WRT350N Kernel Patches