Commit | Line | Data |
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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 | ||
1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
2d9b06c7 | 35 | #include <linux/socket.h> |
1da177e4 | 36 | #include <linux/quota.h> |
1da177e4 LT |
37 | #include <linux/poll.h> |
38 | #include <linux/eventpoll.h> | |
39 | #include <linux/personality.h> | |
40 | #include <linux/ptrace.h> | |
75529219 | 41 | #include <linux/regset.h> |
1da177e4 LT |
42 | #include <linux/stat.h> |
43 | #include <linux/ipc.h> | |
a9415644 | 44 | #include <linux/capability.h> |
1da177e4 LT |
45 | #include <linux/compat.h> |
46 | #include <linux/vfs.h> | |
47 | #include <linux/mman.h> | |
92ff2ecd | 48 | #include <linux/mutex.h> |
1da177e4 LT |
49 | |
50 | #include <asm/intrinsics.h> | |
1da177e4 LT |
51 | #include <asm/types.h> |
52 | #include <asm/uaccess.h> | |
53 | #include <asm/unistd.h> | |
54 | ||
55 | #include "ia32priv.h" | |
56 | ||
57 | #include <net/scm.h> | |
58 | #include <net/sock.h> | |
59 | ||
60 | #define DEBUG 0 | |
61 | ||
62 | #if DEBUG | |
63 | # define DBG(fmt...) printk(KERN_DEBUG fmt) | |
64 | #else | |
65 | # define DBG(fmt...) | |
66 | #endif | |
67 | ||
68 | #define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1))) | |
69 | ||
70 | #define OFFSET4K(a) ((a) & 0xfff) | |
71 | #define PAGE_START(addr) ((addr) & PAGE_MASK) | |
72 | #define MINSIGSTKSZ_IA32 2048 | |
73 | ||
74 | #define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid)) | |
75 | #define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid)) | |
76 | ||
77 | /* | |
78 | * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore | |
79 | * while doing so. | |
80 | */ | |
81 | /* XXX make per-mm: */ | |
92ff2ecd | 82 | static DEFINE_MUTEX(ia32_mmap_mutex); |
1da177e4 LT |
83 | |
84 | asmlinkage long | |
85 | sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp, | |
86 | struct pt_regs *regs) | |
87 | { | |
88 | long error; | |
89 | char *filename; | |
90 | unsigned long old_map_base, old_task_size, tssd; | |
91 | ||
92 | filename = getname(name); | |
93 | error = PTR_ERR(filename); | |
94 | if (IS_ERR(filename)) | |
95 | return error; | |
96 | ||
97 | old_map_base = current->thread.map_base; | |
98 | old_task_size = current->thread.task_size; | |
99 | tssd = ia64_get_kr(IA64_KR_TSSD); | |
100 | ||
101 | /* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */ | |
102 | current->thread.map_base = DEFAULT_MAP_BASE; | |
103 | current->thread.task_size = DEFAULT_TASK_SIZE; | |
104 | ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob); | |
105 | ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1); | |
106 | ||
107 | error = compat_do_execve(filename, argv, envp, regs); | |
108 | putname(filename); | |
109 | ||
110 | if (error < 0) { | |
111 | /* oops, execve failed, switch back to old values... */ | |
112 | ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE); | |
113 | ia64_set_kr(IA64_KR_TSSD, tssd); | |
114 | current->thread.map_base = old_map_base; | |
115 | current->thread.task_size = old_task_size; | |
116 | } | |
117 | ||
118 | return error; | |
119 | } | |
120 | ||
1da177e4 LT |
121 | |
122 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
123 | ||
124 | ||
125 | static int | |
126 | get_page_prot (struct vm_area_struct *vma, unsigned long addr) | |
127 | { | |
128 | int prot = 0; | |
129 | ||
130 | if (!vma || vma->vm_start > addr) | |
131 | return 0; | |
132 | ||
133 | if (vma->vm_flags & VM_READ) | |
134 | prot |= PROT_READ; | |
135 | if (vma->vm_flags & VM_WRITE) | |
136 | prot |= PROT_WRITE; | |
137 | if (vma->vm_flags & VM_EXEC) | |
138 | prot |= PROT_EXEC; | |
139 | return prot; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Map a subpage by creating an anonymous page that contains the union of the old page and | |
144 | * the subpage. | |
145 | */ | |
146 | static unsigned long | |
147 | mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags, | |
148 | loff_t off) | |
149 | { | |
150 | void *page = NULL; | |
151 | struct inode *inode; | |
152 | unsigned long ret = 0; | |
153 | struct vm_area_struct *vma = find_vma(current->mm, start); | |
154 | int old_prot = get_page_prot(vma, start); | |
155 | ||
156 | DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n", | |
157 | file, start, end, prot, flags, off); | |
158 | ||
159 | ||
160 | /* Optimize the case where the old mmap and the new mmap are both anonymous */ | |
161 | if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) { | |
162 | if (clear_user((void __user *) start, end - start)) { | |
163 | ret = -EFAULT; | |
164 | goto out; | |
165 | } | |
166 | goto skip_mmap; | |
167 | } | |
168 | ||
169 | page = (void *) get_zeroed_page(GFP_KERNEL); | |
170 | if (!page) | |
171 | return -ENOMEM; | |
172 | ||
173 | if (old_prot) | |
174 | copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE); | |
175 | ||
176 | down_write(¤t->mm->mmap_sem); | |
177 | { | |
178 | ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE, | |
179 | flags | MAP_FIXED | MAP_ANONYMOUS, 0); | |
180 | } | |
181 | up_write(¤t->mm->mmap_sem); | |
182 | ||
183 | if (IS_ERR((void *) ret)) | |
184 | goto out; | |
185 | ||
186 | if (old_prot) { | |
187 | /* copy back the old page contents. */ | |
188 | if (offset_in_page(start)) | |
189 | copy_to_user((void __user *) PAGE_START(start), page, | |
190 | offset_in_page(start)); | |
191 | if (offset_in_page(end)) | |
192 | copy_to_user((void __user *) end, page + offset_in_page(end), | |
193 | PAGE_SIZE - offset_in_page(end)); | |
194 | } | |
195 | ||
196 | if (!(flags & MAP_ANONYMOUS)) { | |
197 | /* read the file contents */ | |
b66ffad9 | 198 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
199 | if (!inode->i_fop || !file->f_op->read |
200 | || ((*file->f_op->read)(file, (char __user *) start, end - start, &off) < 0)) | |
201 | { | |
202 | ret = -EINVAL; | |
203 | goto out; | |
204 | } | |
205 | } | |
206 | ||
207 | skip_mmap: | |
208 | if (!(prot & PROT_WRITE)) | |
209 | ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot); | |
210 | out: | |
211 | if (page) | |
212 | free_page((unsigned long) page); | |
213 | return ret; | |
214 | } | |
215 | ||
3b74d18e | 216 | /* SLAB cache for ia64_partial_page structures */ |
217 | struct kmem_cache *ia64_partial_page_cachep; | |
1da177e4 LT |
218 | |
219 | /* | |
3b74d18e | 220 | * init ia64_partial_page_list. |
1da177e4 LT |
221 | * return 0 means kmalloc fail. |
222 | */ | |
3b74d18e | 223 | struct ia64_partial_page_list* |
1da177e4 LT |
224 | ia32_init_pp_list(void) |
225 | { | |
3b74d18e | 226 | struct ia64_partial_page_list *p; |
1da177e4 LT |
227 | |
228 | if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL) | |
229 | return p; | |
230 | p->pp_head = NULL; | |
231 | p->ppl_rb = RB_ROOT; | |
232 | p->pp_hint = NULL; | |
233 | atomic_set(&p->pp_count, 1); | |
234 | return p; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Search for the partial page with @start in partial page list @ppl. | |
239 | * If finds the partial page, return the found partial page. | |
240 | * Else, return 0 and provide @pprev, @rb_link, @rb_parent to | |
241 | * be used by later __ia32_insert_pp(). | |
242 | */ | |
3b74d18e | 243 | static struct ia64_partial_page * |
244 | __ia32_find_pp(struct ia64_partial_page_list *ppl, unsigned int start, | |
245 | struct ia64_partial_page **pprev, struct rb_node ***rb_link, | |
1da177e4 LT |
246 | struct rb_node **rb_parent) |
247 | { | |
3b74d18e | 248 | struct ia64_partial_page *pp; |
1da177e4 LT |
249 | struct rb_node **__rb_link, *__rb_parent, *rb_prev; |
250 | ||
251 | pp = ppl->pp_hint; | |
252 | if (pp && pp->base == start) | |
253 | return pp; | |
254 | ||
255 | __rb_link = &ppl->ppl_rb.rb_node; | |
256 | rb_prev = __rb_parent = NULL; | |
257 | ||
258 | while (*__rb_link) { | |
259 | __rb_parent = *__rb_link; | |
3b74d18e | 260 | pp = rb_entry(__rb_parent, struct ia64_partial_page, pp_rb); |
1da177e4 LT |
261 | |
262 | if (pp->base == start) { | |
263 | ppl->pp_hint = pp; | |
264 | return pp; | |
265 | } else if (pp->base < start) { | |
266 | rb_prev = __rb_parent; | |
267 | __rb_link = &__rb_parent->rb_right; | |
268 | } else { | |
269 | __rb_link = &__rb_parent->rb_left; | |
270 | } | |
271 | } | |
272 | ||
273 | *rb_link = __rb_link; | |
274 | *rb_parent = __rb_parent; | |
275 | *pprev = NULL; | |
276 | if (rb_prev) | |
3b74d18e | 277 | *pprev = rb_entry(rb_prev, struct ia64_partial_page, pp_rb); |
1da177e4 LT |
278 | return NULL; |
279 | } | |
280 | ||
281 | /* | |
282 | * insert @pp into @ppl. | |
283 | */ | |
284 | static void | |
3b74d18e | 285 | __ia32_insert_pp(struct ia64_partial_page_list *ppl, |
286 | struct ia64_partial_page *pp, struct ia64_partial_page *prev, | |
287 | struct rb_node **rb_link, struct rb_node *rb_parent) | |
1da177e4 LT |
288 | { |
289 | /* link list */ | |
290 | if (prev) { | |
291 | pp->next = prev->next; | |
292 | prev->next = pp; | |
293 | } else { | |
294 | ppl->pp_head = pp; | |
295 | if (rb_parent) | |
296 | pp->next = rb_entry(rb_parent, | |
3b74d18e | 297 | struct ia64_partial_page, pp_rb); |
1da177e4 LT |
298 | else |
299 | pp->next = NULL; | |
300 | } | |
301 | ||
302 | /* link rb */ | |
303 | rb_link_node(&pp->pp_rb, rb_parent, rb_link); | |
304 | rb_insert_color(&pp->pp_rb, &ppl->ppl_rb); | |
305 | ||
306 | ppl->pp_hint = pp; | |
307 | } | |
308 | ||
309 | /* | |
310 | * delete @pp from partial page list @ppl. | |
311 | */ | |
312 | static void | |
3b74d18e | 313 | __ia32_delete_pp(struct ia64_partial_page_list *ppl, |
314 | struct ia64_partial_page *pp, struct ia64_partial_page *prev) | |
1da177e4 LT |
315 | { |
316 | if (prev) { | |
317 | prev->next = pp->next; | |
318 | if (ppl->pp_hint == pp) | |
319 | ppl->pp_hint = prev; | |
320 | } else { | |
321 | ppl->pp_head = pp->next; | |
322 | if (ppl->pp_hint == pp) | |
323 | ppl->pp_hint = pp->next; | |
324 | } | |
325 | rb_erase(&pp->pp_rb, &ppl->ppl_rb); | |
3b74d18e | 326 | kmem_cache_free(ia64_partial_page_cachep, pp); |
1da177e4 LT |
327 | } |
328 | ||
3b74d18e | 329 | static struct ia64_partial_page * |
330 | __pp_prev(struct ia64_partial_page *pp) | |
1da177e4 LT |
331 | { |
332 | struct rb_node *prev = rb_prev(&pp->pp_rb); | |
333 | if (prev) | |
3b74d18e | 334 | return rb_entry(prev, struct ia64_partial_page, pp_rb); |
1da177e4 LT |
335 | else |
336 | return NULL; | |
337 | } | |
338 | ||
339 | /* | |
340 | * Delete partial pages with address between @start and @end. | |
341 | * @start and @end are page aligned. | |
342 | */ | |
343 | static void | |
344 | __ia32_delete_pp_range(unsigned int start, unsigned int end) | |
345 | { | |
3b74d18e | 346 | struct ia64_partial_page *pp, *prev; |
1da177e4 LT |
347 | struct rb_node **rb_link, *rb_parent; |
348 | ||
349 | if (start >= end) | |
350 | return; | |
351 | ||
352 | pp = __ia32_find_pp(current->thread.ppl, start, &prev, | |
353 | &rb_link, &rb_parent); | |
354 | if (pp) | |
355 | prev = __pp_prev(pp); | |
356 | else { | |
357 | if (prev) | |
358 | pp = prev->next; | |
359 | else | |
360 | pp = current->thread.ppl->pp_head; | |
361 | } | |
362 | ||
363 | while (pp && pp->base < end) { | |
3b74d18e | 364 | struct ia64_partial_page *tmp = pp->next; |
1da177e4 LT |
365 | __ia32_delete_pp(current->thread.ppl, pp, prev); |
366 | pp = tmp; | |
367 | } | |
368 | } | |
369 | ||
370 | /* | |
371 | * Set the range between @start and @end in bitmap. | |
372 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
373 | */ | |
374 | static int | |
375 | __ia32_set_pp(unsigned int start, unsigned int end, int flags) | |
376 | { | |
3b74d18e | 377 | struct ia64_partial_page *pp, *prev; |
1da177e4 LT |
378 | struct rb_node ** rb_link, *rb_parent; |
379 | unsigned int pstart, start_bit, end_bit, i; | |
380 | ||
381 | pstart = PAGE_START(start); | |
382 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
383 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
384 | if (end_bit == 0) | |
385 | end_bit = PAGE_SIZE / IA32_PAGE_SIZE; | |
386 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
387 | &rb_link, &rb_parent); | |
388 | if (pp) { | |
389 | for (i = start_bit; i < end_bit; i++) | |
390 | set_bit(i, &pp->bitmap); | |
391 | /* | |
392 | * Check: if this partial page has been set to a full page, | |
393 | * then delete it. | |
394 | */ | |
395 | if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >= | |
396 | PAGE_SIZE/IA32_PAGE_SIZE) { | |
397 | __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp)); | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
402 | /* | |
403 | * MAP_FIXED may lead to overlapping mmap. | |
404 | * In this case, the requested mmap area may already mmaped as a full | |
405 | * page. So check vma before adding a new partial page. | |
406 | */ | |
407 | if (flags & MAP_FIXED) { | |
408 | struct vm_area_struct *vma = find_vma(current->mm, pstart); | |
409 | if (vma && vma->vm_start <= pstart) | |
410 | return 0; | |
411 | } | |
412 | ||
3b74d18e | 413 | /* new a ia64_partial_page */ |
414 | pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); | |
1da177e4 LT |
415 | if (!pp) |
416 | return -ENOMEM; | |
417 | pp->base = pstart; | |
418 | pp->bitmap = 0; | |
419 | for (i=start_bit; i<end_bit; i++) | |
420 | set_bit(i, &(pp->bitmap)); | |
421 | pp->next = NULL; | |
422 | __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent); | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /* | |
427 | * @start and @end should be IA32 page aligned, but don't need to be in the | |
428 | * same IA64 page. Split @start and @end to make sure they're in the same IA64 | |
429 | * page, then call __ia32_set_pp(). | |
430 | */ | |
431 | static void | |
432 | ia32_set_pp(unsigned int start, unsigned int end, int flags) | |
433 | { | |
434 | down_write(¤t->mm->mmap_sem); | |
435 | if (flags & MAP_FIXED) { | |
436 | /* | |
437 | * MAP_FIXED may lead to overlapping mmap. When this happens, | |
438 | * a series of complete IA64 pages results in deletion of | |
439 | * old partial pages in that range. | |
440 | */ | |
441 | __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end)); | |
442 | } | |
443 | ||
444 | if (end < PAGE_ALIGN(start)) { | |
445 | __ia32_set_pp(start, end, flags); | |
446 | } else { | |
447 | if (offset_in_page(start)) | |
448 | __ia32_set_pp(start, PAGE_ALIGN(start), flags); | |
449 | if (offset_in_page(end)) | |
450 | __ia32_set_pp(PAGE_START(end), end, flags); | |
451 | } | |
452 | up_write(¤t->mm->mmap_sem); | |
453 | } | |
454 | ||
455 | /* | |
456 | * Unset the range between @start and @end in bitmap. | |
457 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
458 | * After doing that, if the bitmap is 0, then free the page and return 1, | |
459 | * else return 0; | |
460 | * If not find the partial page in the list, then | |
461 | * If the vma exists, then the full page is set to a partial page; | |
462 | * Else return -ENOMEM. | |
463 | */ | |
464 | static int | |
465 | __ia32_unset_pp(unsigned int start, unsigned int end) | |
466 | { | |
3b74d18e | 467 | struct ia64_partial_page *pp, *prev; |
1da177e4 LT |
468 | struct rb_node ** rb_link, *rb_parent; |
469 | unsigned int pstart, start_bit, end_bit, i; | |
470 | struct vm_area_struct *vma; | |
471 | ||
472 | pstart = PAGE_START(start); | |
473 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
474 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
475 | if (end_bit == 0) | |
476 | end_bit = PAGE_SIZE / IA32_PAGE_SIZE; | |
477 | ||
478 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
479 | &rb_link, &rb_parent); | |
480 | if (pp) { | |
481 | for (i = start_bit; i < end_bit; i++) | |
482 | clear_bit(i, &pp->bitmap); | |
483 | if (pp->bitmap == 0) { | |
484 | __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp)); | |
485 | return 1; | |
486 | } | |
487 | return 0; | |
488 | } | |
489 | ||
490 | vma = find_vma(current->mm, pstart); | |
491 | if (!vma || vma->vm_start > pstart) { | |
492 | return -ENOMEM; | |
493 | } | |
494 | ||
3b74d18e | 495 | /* new a ia64_partial_page */ |
496 | pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); | |
1da177e4 LT |
497 | if (!pp) |
498 | return -ENOMEM; | |
499 | pp->base = pstart; | |
500 | pp->bitmap = 0; | |
501 | for (i = 0; i < start_bit; i++) | |
502 | set_bit(i, &(pp->bitmap)); | |
503 | for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++) | |
504 | set_bit(i, &(pp->bitmap)); | |
505 | pp->next = NULL; | |
506 | __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent); | |
507 | return 0; | |
508 | } | |
509 | ||
510 | /* | |
511 | * Delete pp between PAGE_ALIGN(start) and PAGE_START(end) by calling | |
512 | * __ia32_delete_pp_range(). Unset possible partial pages by calling | |
513 | * __ia32_unset_pp(). | |
514 | * The returned value see __ia32_unset_pp(). | |
515 | */ | |
516 | static int | |
517 | ia32_unset_pp(unsigned int *startp, unsigned int *endp) | |
518 | { | |
519 | unsigned int start = *startp, end = *endp; | |
520 | int ret = 0; | |
521 | ||
522 | down_write(¤t->mm->mmap_sem); | |
523 | ||
524 | __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end)); | |
525 | ||
526 | if (end < PAGE_ALIGN(start)) { | |
527 | ret = __ia32_unset_pp(start, end); | |
528 | if (ret == 1) { | |
529 | *startp = PAGE_START(start); | |
530 | *endp = PAGE_ALIGN(end); | |
531 | } | |
532 | if (ret == 0) { | |
533 | /* to shortcut sys_munmap() in sys32_munmap() */ | |
534 | *startp = PAGE_START(start); | |
535 | *endp = PAGE_START(end); | |
536 | } | |
537 | } else { | |
538 | if (offset_in_page(start)) { | |
539 | ret = __ia32_unset_pp(start, PAGE_ALIGN(start)); | |
540 | if (ret == 1) | |
541 | *startp = PAGE_START(start); | |
542 | if (ret == 0) | |
543 | *startp = PAGE_ALIGN(start); | |
544 | if (ret < 0) | |
545 | goto out; | |
546 | } | |
547 | if (offset_in_page(end)) { | |
548 | ret = __ia32_unset_pp(PAGE_START(end), end); | |
549 | if (ret == 1) | |
550 | *endp = PAGE_ALIGN(end); | |
551 | if (ret == 0) | |
552 | *endp = PAGE_START(end); | |
553 | } | |
554 | } | |
555 | ||
556 | out: | |
557 | up_write(¤t->mm->mmap_sem); | |
558 | return ret; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Compare the range between @start and @end with bitmap in partial page. | |
563 | * @start and @end should be IA32 page aligned and in the same IA64 page. | |
564 | */ | |
565 | static int | |
566 | __ia32_compare_pp(unsigned int start, unsigned int end) | |
567 | { | |
3b74d18e | 568 | struct ia64_partial_page *pp, *prev; |
1da177e4 LT |
569 | struct rb_node ** rb_link, *rb_parent; |
570 | unsigned int pstart, start_bit, end_bit, size; | |
571 | unsigned int first_bit, next_zero_bit; /* the first range in bitmap */ | |
572 | ||
573 | pstart = PAGE_START(start); | |
574 | ||
575 | pp = __ia32_find_pp(current->thread.ppl, pstart, &prev, | |
576 | &rb_link, &rb_parent); | |
577 | if (!pp) | |
578 | return 1; | |
579 | ||
580 | start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE; | |
581 | end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE; | |
582 | size = sizeof(pp->bitmap) * 8; | |
583 | first_bit = find_first_bit(&pp->bitmap, size); | |
584 | next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit); | |
585 | if ((start_bit < first_bit) || (end_bit > next_zero_bit)) { | |
586 | /* exceeds the first range in bitmap */ | |
587 | return -ENOMEM; | |
588 | } else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) { | |
589 | first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit); | |
590 | if ((next_zero_bit < first_bit) && (first_bit < size)) | |
591 | return 1; /* has next range */ | |
592 | else | |
593 | return 0; /* no next range */ | |
594 | } else | |
595 | return 1; | |
596 | } | |
597 | ||
598 | /* | |
599 | * @start and @end should be IA32 page aligned, but don't need to be in the | |
600 | * same IA64 page. Split @start and @end to make sure they're in the same IA64 | |
601 | * page, then call __ia32_compare_pp(). | |
602 | * | |
603 | * Take this as example: the range is the 1st and 2nd 4K page. | |
604 | * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011; | |
605 | * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111; | |
606 | * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or | |
607 | * bitmap = 00000101. | |
608 | */ | |
609 | static int | |
610 | ia32_compare_pp(unsigned int *startp, unsigned int *endp) | |
611 | { | |
612 | unsigned int start = *startp, end = *endp; | |
613 | int retval = 0; | |
614 | ||
615 | down_write(¤t->mm->mmap_sem); | |
616 | ||
617 | if (end < PAGE_ALIGN(start)) { | |
618 | retval = __ia32_compare_pp(start, end); | |
619 | if (retval == 0) { | |
620 | *startp = PAGE_START(start); | |
621 | *endp = PAGE_ALIGN(end); | |
622 | } | |
623 | } else { | |
624 | if (offset_in_page(start)) { | |
625 | retval = __ia32_compare_pp(start, | |
626 | PAGE_ALIGN(start)); | |
627 | if (retval == 0) | |
628 | *startp = PAGE_START(start); | |
629 | if (retval < 0) | |
630 | goto out; | |
631 | } | |
632 | if (offset_in_page(end)) { | |
633 | retval = __ia32_compare_pp(PAGE_START(end), end); | |
634 | if (retval == 0) | |
635 | *endp = PAGE_ALIGN(end); | |
636 | } | |
637 | } | |
638 | ||
639 | out: | |
640 | up_write(¤t->mm->mmap_sem); | |
641 | return retval; | |
642 | } | |
643 | ||
644 | static void | |
3b74d18e | 645 | __ia32_drop_pp_list(struct ia64_partial_page_list *ppl) |
1da177e4 | 646 | { |
3b74d18e | 647 | struct ia64_partial_page *pp = ppl->pp_head; |
1da177e4 LT |
648 | |
649 | while (pp) { | |
3b74d18e | 650 | struct ia64_partial_page *next = pp->next; |
651 | kmem_cache_free(ia64_partial_page_cachep, pp); | |
1da177e4 LT |
652 | pp = next; |
653 | } | |
654 | ||
655 | kfree(ppl); | |
656 | } | |
657 | ||
658 | void | |
3b74d18e | 659 | ia32_drop_ia64_partial_page_list(struct task_struct *task) |
1da177e4 | 660 | { |
3b74d18e | 661 | struct ia64_partial_page_list* ppl = task->thread.ppl; |
1da177e4 LT |
662 | |
663 | if (ppl && atomic_dec_and_test(&ppl->pp_count)) | |
664 | __ia32_drop_pp_list(ppl); | |
665 | } | |
666 | ||
667 | /* | |
668 | * Copy current->thread.ppl to ppl (already initialized). | |
669 | */ | |
670 | static int | |
3b74d18e | 671 | __ia32_copy_pp_list(struct ia64_partial_page_list *ppl) |
1da177e4 | 672 | { |
3b74d18e | 673 | struct ia64_partial_page *pp, *tmp, *prev; |
1da177e4 LT |
674 | struct rb_node **rb_link, *rb_parent; |
675 | ||
676 | ppl->pp_head = NULL; | |
677 | ppl->pp_hint = NULL; | |
678 | ppl->ppl_rb = RB_ROOT; | |
679 | rb_link = &ppl->ppl_rb.rb_node; | |
680 | rb_parent = NULL; | |
681 | prev = NULL; | |
682 | ||
683 | for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) { | |
3b74d18e | 684 | tmp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); |
1da177e4 LT |
685 | if (!tmp) |
686 | return -ENOMEM; | |
687 | *tmp = *pp; | |
688 | __ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent); | |
689 | prev = tmp; | |
690 | rb_link = &tmp->pp_rb.rb_right; | |
691 | rb_parent = &tmp->pp_rb; | |
692 | } | |
693 | return 0; | |
694 | } | |
695 | ||
696 | int | |
3b74d18e | 697 | ia32_copy_ia64_partial_page_list(struct task_struct *p, |
698 | unsigned long clone_flags) | |
1da177e4 LT |
699 | { |
700 | int retval = 0; | |
701 | ||
702 | if (clone_flags & CLONE_VM) { | |
703 | atomic_inc(¤t->thread.ppl->pp_count); | |
704 | p->thread.ppl = current->thread.ppl; | |
705 | } else { | |
706 | p->thread.ppl = ia32_init_pp_list(); | |
707 | if (!p->thread.ppl) | |
708 | return -ENOMEM; | |
709 | down_write(¤t->mm->mmap_sem); | |
710 | { | |
711 | retval = __ia32_copy_pp_list(p->thread.ppl); | |
712 | } | |
713 | up_write(¤t->mm->mmap_sem); | |
714 | } | |
715 | ||
716 | return retval; | |
717 | } | |
718 | ||
719 | static unsigned long | |
720 | emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags, | |
721 | loff_t off) | |
722 | { | |
723 | unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0; | |
724 | struct inode *inode; | |
725 | loff_t poff; | |
726 | ||
727 | end = start + len; | |
728 | pstart = PAGE_START(start); | |
729 | pend = PAGE_ALIGN(end); | |
730 | ||
731 | if (flags & MAP_FIXED) { | |
732 | ia32_set_pp((unsigned int)start, (unsigned int)end, flags); | |
733 | if (start > pstart) { | |
734 | if (flags & MAP_SHARED) | |
735 | printk(KERN_INFO | |
736 | "%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n", | |
19c5870c | 737 | current->comm, task_pid_nr(current), start); |
1da177e4 LT |
738 | ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags, |
739 | off); | |
740 | if (IS_ERR((void *) ret)) | |
741 | return ret; | |
742 | pstart += PAGE_SIZE; | |
743 | if (pstart >= pend) | |
744 | goto out; /* done */ | |
745 | } | |
746 | if (end < pend) { | |
747 | if (flags & MAP_SHARED) | |
748 | printk(KERN_INFO | |
749 | "%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n", | |
19c5870c | 750 | current->comm, task_pid_nr(current), end); |
1da177e4 LT |
751 | ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags, |
752 | (off + len) - offset_in_page(end)); | |
753 | if (IS_ERR((void *) ret)) | |
754 | return ret; | |
755 | pend -= PAGE_SIZE; | |
756 | if (pstart >= pend) | |
757 | goto out; /* done */ | |
758 | } | |
759 | } else { | |
760 | /* | |
761 | * If a start address was specified, use it if the entire rounded out area | |
762 | * is available. | |
763 | */ | |
764 | if (start && !pstart) | |
765 | fudge = 1; /* handle case of mapping to range (0,PAGE_SIZE) */ | |
766 | tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags); | |
767 | if (tmp != pstart) { | |
768 | pstart = tmp; | |
769 | start = pstart + offset_in_page(off); /* make start congruent with off */ | |
770 | end = start + len; | |
771 | pend = PAGE_ALIGN(end); | |
772 | } | |
773 | } | |
774 | ||
775 | poff = off + (pstart - start); /* note: (pstart - start) may be negative */ | |
776 | is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0); | |
777 | ||
778 | if ((flags & MAP_SHARED) && !is_congruent) | |
779 | printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap " | |
19c5870c | 780 | "(addr=0x%lx,off=0x%llx)\n", current->comm, task_pid_nr(current), start, off); |
1da177e4 LT |
781 | |
782 | DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend, | |
783 | is_congruent ? "congruent" : "not congruent", poff); | |
784 | ||
785 | down_write(¤t->mm->mmap_sem); | |
786 | { | |
787 | if (!(flags & MAP_ANONYMOUS) && is_congruent) | |
788 | ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff); | |
789 | else | |
790 | ret = do_mmap(NULL, pstart, pend - pstart, | |
791 | prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE), | |
792 | flags | MAP_FIXED | MAP_ANONYMOUS, 0); | |
793 | } | |
794 | up_write(¤t->mm->mmap_sem); | |
795 | ||
796 | if (IS_ERR((void *) ret)) | |
797 | return ret; | |
798 | ||
799 | if (!is_congruent) { | |
800 | /* read the file contents */ | |
b66ffad9 | 801 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
802 | if (!inode->i_fop || !file->f_op->read |
803 | || ((*file->f_op->read)(file, (char __user *) pstart, pend - pstart, &poff) | |
804 | < 0)) | |
805 | { | |
806 | sys_munmap(pstart, pend - pstart); | |
807 | return -EINVAL; | |
808 | } | |
809 | if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0) | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
813 | if (!(flags & MAP_FIXED)) | |
814 | ia32_set_pp((unsigned int)start, (unsigned int)end, flags); | |
815 | out: | |
816 | return start; | |
817 | } | |
818 | ||
819 | #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */ | |
820 | ||
821 | static inline unsigned int | |
822 | get_prot32 (unsigned int prot) | |
823 | { | |
824 | if (prot & PROT_WRITE) | |
825 | /* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */ | |
826 | prot |= PROT_READ | PROT_WRITE | PROT_EXEC; | |
827 | else if (prot & (PROT_READ | PROT_EXEC)) | |
828 | /* on x86, there is no distinction between PROT_READ and PROT_EXEC */ | |
829 | prot |= (PROT_READ | PROT_EXEC); | |
830 | ||
831 | return prot; | |
832 | } | |
833 | ||
834 | unsigned long | |
835 | ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags, | |
836 | loff_t offset) | |
837 | { | |
838 | DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n", | |
839 | file, addr, len, prot, flags, offset); | |
840 | ||
841 | if (file && (!file->f_op || !file->f_op->mmap)) | |
842 | return -ENODEV; | |
843 | ||
844 | len = IA32_PAGE_ALIGN(len); | |
845 | if (len == 0) | |
846 | return addr; | |
847 | ||
848 | if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len) | |
849 | { | |
850 | if (flags & MAP_FIXED) | |
851 | return -ENOMEM; | |
852 | else | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
856 | if (OFFSET4K(offset)) | |
857 | return -EINVAL; | |
858 | ||
859 | prot = get_prot32(prot); | |
860 | ||
861 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
92ff2ecd | 862 | mutex_lock(&ia32_mmap_mutex); |
1da177e4 LT |
863 | { |
864 | addr = emulate_mmap(file, addr, len, prot, flags, offset); | |
865 | } | |
92ff2ecd | 866 | mutex_unlock(&ia32_mmap_mutex); |
1da177e4 LT |
867 | #else |
868 | down_write(¤t->mm->mmap_sem); | |
869 | { | |
870 | addr = do_mmap(file, addr, len, prot, flags, offset); | |
871 | } | |
872 | up_write(¤t->mm->mmap_sem); | |
873 | #endif | |
874 | DBG("ia32_do_mmap: returning 0x%lx\n", addr); | |
875 | return addr; | |
876 | } | |
877 | ||
878 | /* | |
879 | * Linux/i386 didn't use to be able to handle more than 4 system call parameters, so these | |
880 | * system calls used a memory block for parameter passing.. | |
881 | */ | |
882 | ||
883 | struct mmap_arg_struct { | |
884 | unsigned int addr; | |
885 | unsigned int len; | |
886 | unsigned int prot; | |
887 | unsigned int flags; | |
888 | unsigned int fd; | |
889 | unsigned int offset; | |
890 | }; | |
891 | ||
892 | asmlinkage long | |
893 | sys32_mmap (struct mmap_arg_struct __user *arg) | |
894 | { | |
895 | struct mmap_arg_struct a; | |
896 | struct file *file = NULL; | |
897 | unsigned long addr; | |
898 | int flags; | |
899 | ||
900 | if (copy_from_user(&a, arg, sizeof(a))) | |
901 | return -EFAULT; | |
902 | ||
903 | if (OFFSET4K(a.offset)) | |
904 | return -EINVAL; | |
905 | ||
906 | flags = a.flags; | |
907 | ||
908 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
909 | if (!(flags & MAP_ANONYMOUS)) { | |
910 | file = fget(a.fd); | |
911 | if (!file) | |
912 | return -EBADF; | |
913 | } | |
914 | ||
915 | addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset); | |
916 | ||
917 | if (file) | |
918 | fput(file); | |
919 | return addr; | |
920 | } | |
921 | ||
922 | asmlinkage long | |
923 | sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags, | |
924 | unsigned int fd, unsigned int pgoff) | |
925 | { | |
926 | struct file *file = NULL; | |
927 | unsigned long retval; | |
928 | ||
929 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
930 | if (!(flags & MAP_ANONYMOUS)) { | |
931 | file = fget(fd); | |
932 | if (!file) | |
933 | return -EBADF; | |
934 | } | |
935 | ||
936 | retval = ia32_do_mmap(file, addr, len, prot, flags, | |
937 | (unsigned long) pgoff << IA32_PAGE_SHIFT); | |
938 | ||
939 | if (file) | |
940 | fput(file); | |
941 | return retval; | |
942 | } | |
943 | ||
944 | asmlinkage long | |
945 | sys32_munmap (unsigned int start, unsigned int len) | |
946 | { | |
947 | unsigned int end = start + len; | |
948 | long ret; | |
949 | ||
950 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
951 | ret = sys_munmap(start, end - start); | |
952 | #else | |
953 | if (OFFSET4K(start)) | |
954 | return -EINVAL; | |
955 | ||
956 | end = IA32_PAGE_ALIGN(end); | |
957 | if (start >= end) | |
958 | return -EINVAL; | |
959 | ||
960 | ret = ia32_unset_pp(&start, &end); | |
961 | if (ret < 0) | |
962 | return ret; | |
963 | ||
964 | if (start >= end) | |
965 | return 0; | |
966 | ||
92ff2ecd JS |
967 | mutex_lock(&ia32_mmap_mutex); |
968 | ret = sys_munmap(start, end - start); | |
969 | mutex_unlock(&ia32_mmap_mutex); | |
1da177e4 LT |
970 | #endif |
971 | return ret; | |
972 | } | |
973 | ||
974 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
975 | ||
976 | /* | |
977 | * When mprotect()ing a partial page, we set the permission to the union of the old | |
978 | * settings and the new settings. In other words, it's only possible to make access to a | |
979 | * partial page less restrictive. | |
980 | */ | |
981 | static long | |
982 | mprotect_subpage (unsigned long address, int new_prot) | |
983 | { | |
984 | int old_prot; | |
985 | struct vm_area_struct *vma; | |
986 | ||
987 | if (new_prot == PROT_NONE) | |
988 | return 0; /* optimize case where nothing changes... */ | |
989 | vma = find_vma(current->mm, address); | |
990 | old_prot = get_page_prot(vma, address); | |
991 | return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot); | |
992 | } | |
993 | ||
994 | #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */ | |
995 | ||
996 | asmlinkage long | |
997 | sys32_mprotect (unsigned int start, unsigned int len, int prot) | |
998 | { | |
999 | unsigned int end = start + len; | |
1000 | #if PAGE_SHIFT > IA32_PAGE_SHIFT | |
1001 | long retval = 0; | |
1002 | #endif | |
1003 | ||
1004 | prot = get_prot32(prot); | |
1005 | ||
1006 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
1007 | return sys_mprotect(start, end - start, prot); | |
1008 | #else | |
1009 | if (OFFSET4K(start)) | |
1010 | return -EINVAL; | |
1011 | ||
1012 | end = IA32_PAGE_ALIGN(end); | |
1013 | if (end < start) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | retval = ia32_compare_pp(&start, &end); | |
1017 | ||
1018 | if (retval < 0) | |
1019 | return retval; | |
1020 | ||
92ff2ecd | 1021 | mutex_lock(&ia32_mmap_mutex); |
1da177e4 LT |
1022 | { |
1023 | if (offset_in_page(start)) { | |
1024 | /* start address is 4KB aligned but not page aligned. */ | |
1025 | retval = mprotect_subpage(PAGE_START(start), prot); | |
1026 | if (retval < 0) | |
1027 | goto out; | |
1028 | ||
1029 | start = PAGE_ALIGN(start); | |
1030 | if (start >= end) | |
1031 | goto out; /* retval is already zero... */ | |
1032 | } | |
1033 | ||
1034 | if (offset_in_page(end)) { | |
1035 | /* end address is 4KB aligned but not page aligned. */ | |
1036 | retval = mprotect_subpage(PAGE_START(end), prot); | |
1037 | if (retval < 0) | |
1038 | goto out; | |
1039 | ||
1040 | end = PAGE_START(end); | |
1041 | } | |
1042 | retval = sys_mprotect(start, end - start, prot); | |
1043 | } | |
1044 | out: | |
92ff2ecd | 1045 | mutex_unlock(&ia32_mmap_mutex); |
1da177e4 LT |
1046 | return retval; |
1047 | #endif | |
1048 | } | |
1049 | ||
1050 | asmlinkage long | |
1051 | sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len, | |
1052 | unsigned int flags, unsigned int new_addr) | |
1053 | { | |
1054 | long ret; | |
1055 | ||
1056 | #if PAGE_SHIFT <= IA32_PAGE_SHIFT | |
1057 | ret = sys_mremap(addr, old_len, new_len, flags, new_addr); | |
1058 | #else | |
1059 | unsigned int old_end, new_end; | |
1060 | ||
1061 | if (OFFSET4K(addr)) | |
1062 | return -EINVAL; | |
1063 | ||
1064 | old_len = IA32_PAGE_ALIGN(old_len); | |
1065 | new_len = IA32_PAGE_ALIGN(new_len); | |
1066 | old_end = addr + old_len; | |
1067 | new_end = addr + new_len; | |
1068 | ||
1069 | if (!new_len) | |
1070 | return -EINVAL; | |
1071 | ||
1072 | if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr))) | |
1073 | return -EINVAL; | |
1074 | ||
1075 | if (old_len >= new_len) { | |
1076 | ret = sys32_munmap(addr + new_len, old_len - new_len); | |
1077 | if (ret && old_len != new_len) | |
1078 | return ret; | |
1079 | ret = addr; | |
1080 | if (!(flags & MREMAP_FIXED) || (new_addr == addr)) | |
1081 | return ret; | |
1082 | old_len = new_len; | |
1083 | } | |
1084 | ||
1085 | addr = PAGE_START(addr); | |
1086 | old_len = PAGE_ALIGN(old_end) - addr; | |
1087 | new_len = PAGE_ALIGN(new_end) - addr; | |
1088 | ||
92ff2ecd JS |
1089 | mutex_lock(&ia32_mmap_mutex); |
1090 | ret = sys_mremap(addr, old_len, new_len, flags, new_addr); | |
1091 | mutex_unlock(&ia32_mmap_mutex); | |
1da177e4 LT |
1092 | |
1093 | if ((ret >= 0) && (old_len < new_len)) { | |
1094 | /* mremap expanded successfully */ | |
1095 | ia32_set_pp(old_end, new_end, flags); | |
1096 | } | |
1097 | #endif | |
1098 | return ret; | |
1099 | } | |
1100 | ||
1da177e4 LT |
1101 | asmlinkage unsigned long |
1102 | sys32_alarm (unsigned int seconds) | |
1103 | { | |
c08b8a49 | 1104 | return alarm_setitimer(seconds); |
1da177e4 LT |
1105 | } |
1106 | ||
1da177e4 LT |
1107 | struct sel_arg_struct { |
1108 | unsigned int n; | |
1109 | unsigned int inp; | |
1110 | unsigned int outp; | |
1111 | unsigned int exp; | |
1112 | unsigned int tvp; | |
1113 | }; | |
1114 | ||
1115 | asmlinkage long | |
1116 | sys32_old_select (struct sel_arg_struct __user *arg) | |
1117 | { | |
1118 | struct sel_arg_struct a; | |
1119 | ||
1120 | if (copy_from_user(&a, arg, sizeof(a))) | |
1121 | return -EFAULT; | |
1122 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
1123 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
1124 | } | |
1125 | ||
1126 | #define SEMOP 1 | |
1127 | #define SEMGET 2 | |
1128 | #define SEMCTL 3 | |
1129 | #define SEMTIMEDOP 4 | |
1130 | #define MSGSND 11 | |
1131 | #define MSGRCV 12 | |
1132 | #define MSGGET 13 | |
1133 | #define MSGCTL 14 | |
1134 | #define SHMAT 21 | |
1135 | #define SHMDT 22 | |
1136 | #define SHMGET 23 | |
1137 | #define SHMCTL 24 | |
1138 | ||
1139 | asmlinkage long | |
1140 | sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth) | |
1141 | { | |
1142 | int version; | |
1143 | ||
1144 | version = call >> 16; /* hack for backward compatibility */ | |
1145 | call &= 0xffff; | |
1146 | ||
1147 | switch (call) { | |
1148 | case SEMTIMEDOP: | |
1149 | if (fifth) | |
1150 | return compat_sys_semtimedop(first, compat_ptr(ptr), | |
1151 | second, compat_ptr(fifth)); | |
1152 | /* else fall through for normal semop() */ | |
1153 | case SEMOP: | |
1154 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
1155 | return sys_semtimedop(first, compat_ptr(ptr), second, | |
1156 | NULL); | |
1157 | case SEMGET: | |
1158 | return sys_semget(first, second, third); | |
1159 | case SEMCTL: | |
1160 | return compat_sys_semctl(first, second, third, compat_ptr(ptr)); | |
1161 | ||
1162 | case MSGSND: | |
1163 | return compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); | |
1164 | case MSGRCV: | |
1165 | return compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr)); | |
1166 | case MSGGET: | |
1167 | return sys_msgget((key_t) first, second); | |
1168 | case MSGCTL: | |
1169 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
1170 | ||
1171 | case SHMAT: | |
1172 | return compat_sys_shmat(first, second, third, version, compat_ptr(ptr)); | |
1173 | break; | |
1174 | case SHMDT: | |
1175 | return sys_shmdt(compat_ptr(ptr)); | |
1176 | case SHMGET: | |
1177 | return sys_shmget(first, (unsigned)second, third); | |
1178 | case SHMCTL: | |
1179 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
1180 | ||
1181 | default: | |
1182 | return -ENOSYS; | |
1183 | } | |
1184 | return -EINVAL; | |
1185 | } | |
1186 | ||
1187 | asmlinkage long | |
1188 | compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options, | |
1189 | struct compat_rusage *ru); | |
1190 | ||
1191 | asmlinkage long | |
1192 | sys32_waitpid (int pid, unsigned int *stat_addr, int options) | |
1193 | { | |
1194 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
1195 | } | |
1196 | ||
1da177e4 LT |
1197 | /* |
1198 | * The order in which registers are stored in the ptrace regs structure | |
1199 | */ | |
1200 | #define PT_EBX 0 | |
1201 | #define PT_ECX 1 | |
1202 | #define PT_EDX 2 | |
1203 | #define PT_ESI 3 | |
1204 | #define PT_EDI 4 | |
1205 | #define PT_EBP 5 | |
1206 | #define PT_EAX 6 | |
1207 | #define PT_DS 7 | |
1208 | #define PT_ES 8 | |
1209 | #define PT_FS 9 | |
1210 | #define PT_GS 10 | |
1211 | #define PT_ORIG_EAX 11 | |
1212 | #define PT_EIP 12 | |
1213 | #define PT_CS 13 | |
1214 | #define PT_EFL 14 | |
1215 | #define PT_UESP 15 | |
1216 | #define PT_SS 16 | |
1217 | ||
1218 | static unsigned int | |
1219 | getreg (struct task_struct *child, int regno) | |
1220 | { | |
1221 | struct pt_regs *child_regs; | |
1222 | ||
6450578f | 1223 | child_regs = task_pt_regs(child); |
1da177e4 LT |
1224 | switch (regno / sizeof(int)) { |
1225 | case PT_EBX: return child_regs->r11; | |
1226 | case PT_ECX: return child_regs->r9; | |
1227 | case PT_EDX: return child_regs->r10; | |
1228 | case PT_ESI: return child_regs->r14; | |
1229 | case PT_EDI: return child_regs->r15; | |
1230 | case PT_EBP: return child_regs->r13; | |
1231 | case PT_EAX: return child_regs->r8; | |
1232 | case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */ | |
1233 | case PT_EIP: return child_regs->cr_iip; | |
1234 | case PT_UESP: return child_regs->r12; | |
1235 | case PT_EFL: return child->thread.eflag; | |
1236 | case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS: | |
1237 | return __USER_DS; | |
1238 | case PT_CS: return __USER_CS; | |
1239 | default: | |
1240 | printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno); | |
1241 | break; | |
1242 | } | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static void | |
1247 | putreg (struct task_struct *child, int regno, unsigned int value) | |
1248 | { | |
1249 | struct pt_regs *child_regs; | |
1250 | ||
6450578f | 1251 | child_regs = task_pt_regs(child); |
1da177e4 LT |
1252 | switch (regno / sizeof(int)) { |
1253 | case PT_EBX: child_regs->r11 = value; break; | |
1254 | case PT_ECX: child_regs->r9 = value; break; | |
1255 | case PT_EDX: child_regs->r10 = value; break; | |
1256 | case PT_ESI: child_regs->r14 = value; break; | |
1257 | case PT_EDI: child_regs->r15 = value; break; | |
1258 | case PT_EBP: child_regs->r13 = value; break; | |
1259 | case PT_EAX: child_regs->r8 = value; break; | |
1260 | case PT_ORIG_EAX: child_regs->r1 = value; break; | |
1261 | case PT_EIP: child_regs->cr_iip = value; break; | |
1262 | case PT_UESP: child_regs->r12 = value; break; | |
1263 | case PT_EFL: child->thread.eflag = value; break; | |
1264 | case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS: | |
1265 | if (value != __USER_DS) | |
1266 | printk(KERN_ERR | |
1267 | "ia32.putreg: attempt to set invalid segment register %d = %x\n", | |
1268 | regno, value); | |
1269 | break; | |
1270 | case PT_CS: | |
1271 | if (value != __USER_CS) | |
1272 | printk(KERN_ERR | |
1273 | "ia32.putreg: attempt to to set invalid segment register %d = %x\n", | |
1274 | regno, value); | |
1275 | break; | |
1276 | default: | |
1277 | printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno); | |
1278 | break; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | static void | |
1283 | put_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp, | |
1284 | struct switch_stack *swp, int tos) | |
1285 | { | |
1286 | struct _fpreg_ia32 *f; | |
1287 | char buf[32]; | |
1288 | ||
1289 | f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15); | |
1290 | if ((regno += tos) >= 8) | |
1291 | regno -= 8; | |
1292 | switch (regno) { | |
1293 | case 0: | |
1294 | ia64f2ia32f(f, &ptp->f8); | |
1295 | break; | |
1296 | case 1: | |
1297 | ia64f2ia32f(f, &ptp->f9); | |
1298 | break; | |
1299 | case 2: | |
1300 | ia64f2ia32f(f, &ptp->f10); | |
1301 | break; | |
1302 | case 3: | |
1303 | ia64f2ia32f(f, &ptp->f11); | |
1304 | break; | |
1305 | case 4: | |
1306 | case 5: | |
1307 | case 6: | |
1308 | case 7: | |
1309 | ia64f2ia32f(f, &swp->f12 + (regno - 4)); | |
1310 | break; | |
1311 | } | |
1312 | copy_to_user(reg, f, sizeof(*reg)); | |
1313 | } | |
1314 | ||
1315 | static void | |
1316 | get_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp, | |
1317 | struct switch_stack *swp, int tos) | |
1318 | { | |
1319 | ||
1320 | if ((regno += tos) >= 8) | |
1321 | regno -= 8; | |
1322 | switch (regno) { | |
1323 | case 0: | |
1324 | copy_from_user(&ptp->f8, reg, sizeof(*reg)); | |
1325 | break; | |
1326 | case 1: | |
1327 | copy_from_user(&ptp->f9, reg, sizeof(*reg)); | |
1328 | break; | |
1329 | case 2: | |
1330 | copy_from_user(&ptp->f10, reg, sizeof(*reg)); | |
1331 | break; | |
1332 | case 3: | |
1333 | copy_from_user(&ptp->f11, reg, sizeof(*reg)); | |
1334 | break; | |
1335 | case 4: | |
1336 | case 5: | |
1337 | case 6: | |
1338 | case 7: | |
1339 | copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg)); | |
1340 | break; | |
1341 | } | |
1342 | return; | |
1343 | } | |
1344 | ||
1345 | int | |
1346 | save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save) | |
1347 | { | |
1348 | struct switch_stack *swp; | |
1349 | struct pt_regs *ptp; | |
1350 | int i, tos; | |
1351 | ||
1352 | if (!access_ok(VERIFY_WRITE, save, sizeof(*save))) | |
1353 | return -EFAULT; | |
1354 | ||
1355 | __put_user(tsk->thread.fcr & 0xffff, &save->cwd); | |
1356 | __put_user(tsk->thread.fsr & 0xffff, &save->swd); | |
1357 | __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd); | |
1358 | __put_user(tsk->thread.fir, &save->fip); | |
1359 | __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs); | |
1360 | __put_user(tsk->thread.fdr, &save->foo); | |
1361 | __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos); | |
1362 | ||
1363 | /* | |
1364 | * Stack frames start with 16-bytes of temp space | |
1365 | */ | |
1366 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1367 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1368 | tos = (tsk->thread.fsr >> 11) & 7; |
1369 | for (i = 0; i < 8; i++) | |
1370 | put_fpreg(i, &save->st_space[i], ptp, swp, tos); | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int | |
1375 | restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save) | |
1376 | { | |
1377 | struct switch_stack *swp; | |
1378 | struct pt_regs *ptp; | |
1379 | int i, tos; | |
1380 | unsigned int fsrlo, fsrhi, num32; | |
1381 | ||
1382 | if (!access_ok(VERIFY_READ, save, sizeof(*save))) | |
1383 | return(-EFAULT); | |
1384 | ||
1385 | __get_user(num32, (unsigned int __user *)&save->cwd); | |
1386 | tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f); | |
1387 | __get_user(fsrlo, (unsigned int __user *)&save->swd); | |
1388 | __get_user(fsrhi, (unsigned int __user *)&save->twd); | |
1389 | num32 = (fsrhi << 16) | fsrlo; | |
1390 | tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32; | |
1391 | __get_user(num32, (unsigned int __user *)&save->fip); | |
1392 | tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32; | |
1393 | __get_user(num32, (unsigned int __user *)&save->foo); | |
1394 | tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32; | |
1395 | ||
1396 | /* | |
1397 | * Stack frames start with 16-bytes of temp space | |
1398 | */ | |
1399 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1400 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1401 | tos = (tsk->thread.fsr >> 11) & 7; |
1402 | for (i = 0; i < 8; i++) | |
1403 | get_fpreg(i, &save->st_space[i], ptp, swp, tos); | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | int | |
1408 | save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save) | |
1409 | { | |
1410 | struct switch_stack *swp; | |
1411 | struct pt_regs *ptp; | |
1412 | int i, tos; | |
1413 | unsigned long mxcsr=0; | |
1414 | unsigned long num128[2]; | |
1415 | ||
1416 | if (!access_ok(VERIFY_WRITE, save, sizeof(*save))) | |
1417 | return -EFAULT; | |
1418 | ||
1419 | __put_user(tsk->thread.fcr & 0xffff, &save->cwd); | |
1420 | __put_user(tsk->thread.fsr & 0xffff, &save->swd); | |
1421 | __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd); | |
1422 | __put_user(tsk->thread.fir, &save->fip); | |
1423 | __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs); | |
1424 | __put_user(tsk->thread.fdr, &save->foo); | |
1425 | __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos); | |
1426 | ||
1427 | /* | |
1428 | * Stack frames start with 16-bytes of temp space | |
1429 | */ | |
1430 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1431 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1432 | tos = (tsk->thread.fsr >> 11) & 7; |
1433 | for (i = 0; i < 8; i++) | |
1434 | put_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos); | |
1435 | ||
1436 | mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f); | |
1437 | __put_user(mxcsr & 0xffff, &save->mxcsr); | |
1438 | for (i = 0; i < 8; i++) { | |
1439 | memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long)); | |
1440 | memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long)); | |
1441 | copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32)); | |
1442 | } | |
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | static int | |
1447 | restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save) | |
1448 | { | |
1449 | struct switch_stack *swp; | |
1450 | struct pt_regs *ptp; | |
1451 | int i, tos; | |
1452 | unsigned int fsrlo, fsrhi, num32; | |
1453 | int mxcsr; | |
1454 | unsigned long num64; | |
1455 | unsigned long num128[2]; | |
1456 | ||
1457 | if (!access_ok(VERIFY_READ, save, sizeof(*save))) | |
1458 | return(-EFAULT); | |
1459 | ||
1460 | __get_user(num32, (unsigned int __user *)&save->cwd); | |
1461 | tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f); | |
1462 | __get_user(fsrlo, (unsigned int __user *)&save->swd); | |
1463 | __get_user(fsrhi, (unsigned int __user *)&save->twd); | |
1464 | num32 = (fsrhi << 16) | fsrlo; | |
1465 | tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32; | |
1466 | __get_user(num32, (unsigned int __user *)&save->fip); | |
1467 | tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32; | |
1468 | __get_user(num32, (unsigned int __user *)&save->foo); | |
1469 | tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32; | |
1470 | ||
1471 | /* | |
1472 | * Stack frames start with 16-bytes of temp space | |
1473 | */ | |
1474 | swp = (struct switch_stack *)(tsk->thread.ksp + 16); | |
6450578f | 1475 | ptp = task_pt_regs(tsk); |
1da177e4 LT |
1476 | tos = (tsk->thread.fsr >> 11) & 7; |
1477 | for (i = 0; i < 8; i++) | |
1478 | get_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos); | |
1479 | ||
1480 | __get_user(mxcsr, (unsigned int __user *)&save->mxcsr); | |
1481 | num64 = mxcsr & 0xff10; | |
1482 | tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000UL)) | (num64<<32); | |
1483 | num64 = mxcsr & 0x3f; | |
1484 | tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000UL)) | (num64<<32); | |
1485 | ||
1486 | for (i = 0; i < 8; i++) { | |
1487 | copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32)); | |
1488 | memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long)); | |
1489 | memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long)); | |
1490 | } | |
1491 | return 0; | |
1492 | } | |
1493 | ||
680973ed SL |
1494 | long compat_arch_ptrace(struct task_struct *child, compat_long_t request, |
1495 | compat_ulong_t caddr, compat_ulong_t cdata) | |
1da177e4 | 1496 | { |
680973ed SL |
1497 | unsigned long addr = caddr; |
1498 | unsigned long data = cdata; | |
1499 | unsigned int tmp; | |
1da177e4 LT |
1500 | long i, ret; |
1501 | ||
1da177e4 | 1502 | switch (request) { |
1da177e4 LT |
1503 | case PTRACE_PEEKUSR: /* read word at addr in USER area */ |
1504 | ret = -EIO; | |
1505 | if ((addr & 3) || addr > 17*sizeof(int)) | |
1506 | break; | |
1507 | ||
1508 | tmp = getreg(child, addr); | |
1509 | if (!put_user(tmp, (unsigned int __user *) compat_ptr(data))) | |
1510 | ret = 0; | |
1511 | break; | |
1512 | ||
1513 | case PTRACE_POKEUSR: /* write word at addr in USER area */ | |
1514 | ret = -EIO; | |
1515 | if ((addr & 3) || addr > 17*sizeof(int)) | |
1516 | break; | |
1517 | ||
1518 | putreg(child, addr, data); | |
1519 | ret = 0; | |
1520 | break; | |
1521 | ||
1522 | case IA32_PTRACE_GETREGS: | |
1523 | if (!access_ok(VERIFY_WRITE, compat_ptr(data), 17*sizeof(int))) { | |
1524 | ret = -EIO; | |
1525 | break; | |
1526 | } | |
1527 | for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) { | |
1528 | put_user(getreg(child, i), (unsigned int __user *) compat_ptr(data)); | |
1529 | data += sizeof(int); | |
1530 | } | |
1531 | ret = 0; | |
1532 | break; | |
1533 | ||
1534 | case IA32_PTRACE_SETREGS: | |
1535 | if (!access_ok(VERIFY_READ, compat_ptr(data), 17*sizeof(int))) { | |
1536 | ret = -EIO; | |
1537 | break; | |
1538 | } | |
1539 | for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) { | |
1540 | get_user(tmp, (unsigned int __user *) compat_ptr(data)); | |
1541 | putreg(child, i, tmp); | |
1542 | data += sizeof(int); | |
1543 | } | |
1544 | ret = 0; | |
1545 | break; | |
1546 | ||
1547 | case IA32_PTRACE_GETFPREGS: | |
1548 | ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct __user *) | |
1549 | compat_ptr(data)); | |
1550 | break; | |
1551 | ||
1552 | case IA32_PTRACE_GETFPXREGS: | |
1553 | ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *) | |
1554 | compat_ptr(data)); | |
1555 | break; | |
1556 | ||
1557 | case IA32_PTRACE_SETFPREGS: | |
1558 | ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct __user *) | |
1559 | compat_ptr(data)); | |
1560 | break; | |
1561 | ||
1562 | case IA32_PTRACE_SETFPXREGS: | |
1563 | ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *) | |
1564 | compat_ptr(data)); | |
1565 | break; | |
1566 | ||
1da177e4 | 1567 | default: |
680973ed | 1568 | return compat_ptrace_request(child, request, caddr, cdata); |
1da177e4 | 1569 | } |
1da177e4 LT |
1570 | return ret; |
1571 | } | |
1572 | ||
1573 | typedef struct { | |
1574 | unsigned int ss_sp; | |
1575 | unsigned int ss_flags; | |
1576 | unsigned int ss_size; | |
1577 | } ia32_stack_t; | |
1578 | ||
1579 | asmlinkage long | |
1580 | sys32_sigaltstack (ia32_stack_t __user *uss32, ia32_stack_t __user *uoss32, | |
1581 | long arg2, long arg3, long arg4, long arg5, long arg6, | |
1582 | long arg7, struct pt_regs pt) | |
1583 | { | |
1584 | stack_t uss, uoss; | |
1585 | ia32_stack_t buf32; | |
1586 | int ret; | |
1587 | mm_segment_t old_fs = get_fs(); | |
1588 | ||
1589 | if (uss32) { | |
1590 | if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t))) | |
1591 | return -EFAULT; | |
1592 | uss.ss_sp = (void __user *) (long) buf32.ss_sp; | |
1593 | uss.ss_flags = buf32.ss_flags; | |
1594 | /* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the | |
1595 | check and set it to the user requested value later */ | |
1596 | if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) { | |
1597 | ret = -ENOMEM; | |
1598 | goto out; | |
1599 | } | |
1600 | uss.ss_size = MINSIGSTKSZ; | |
1601 | } | |
1602 | set_fs(KERNEL_DS); | |
1603 | ret = do_sigaltstack(uss32 ? (stack_t __user *) &uss : NULL, | |
1604 | (stack_t __user *) &uoss, pt.r12); | |
1605 | current->sas_ss_size = buf32.ss_size; | |
1606 | set_fs(old_fs); | |
1607 | out: | |
1608 | if (ret < 0) | |
1609 | return(ret); | |
1610 | if (uoss32) { | |
1611 | buf32.ss_sp = (long __user) uoss.ss_sp; | |
1612 | buf32.ss_flags = uoss.ss_flags; | |
1613 | buf32.ss_size = uoss.ss_size; | |
1614 | if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t))) | |
1615 | return -EFAULT; | |
1616 | } | |
1617 | return ret; | |
1618 | } | |
1619 | ||
1da177e4 LT |
1620 | asmlinkage int |
1621 | sys32_msync (unsigned int start, unsigned int len, int flags) | |
1622 | { | |
1623 | unsigned int addr; | |
1624 | ||
1625 | if (OFFSET4K(start)) | |
1626 | return -EINVAL; | |
1627 | addr = PAGE_START(start); | |
1628 | return sys_msync(addr, len + (start - addr), flags); | |
1629 | } | |
1630 | ||
1631 | struct sysctl32 { | |
1632 | unsigned int name; | |
1633 | int nlen; | |
1634 | unsigned int oldval; | |
1635 | unsigned int oldlenp; | |
1636 | unsigned int newval; | |
1637 | unsigned int newlen; | |
1638 | unsigned int __unused[4]; | |
1639 | }; | |
1640 | ||
b89a8171 | 1641 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
1642 | asmlinkage long |
1643 | sys32_sysctl (struct sysctl32 __user *args) | |
1644 | { | |
1645 | struct sysctl32 a32; | |
1646 | mm_segment_t old_fs = get_fs (); | |
1647 | void __user *oldvalp, *newvalp; | |
1648 | size_t oldlen; | |
1649 | int __user *namep; | |
1650 | long ret; | |
1651 | ||
1652 | if (copy_from_user(&a32, args, sizeof(a32))) | |
1653 | return -EFAULT; | |
1654 | ||
1655 | /* | |
1656 | * We need to pre-validate these because we have to disable address checking | |
1657 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the | |
1658 | * user specifying bad addresses here. Well, since we're dealing with 32 bit | |
1659 | * addresses, we KNOW that access_ok() will always succeed, so this is an | |
1660 | * expensive NOP, but so what... | |
1661 | */ | |
1662 | namep = (int __user *) compat_ptr(a32.name); | |
1663 | oldvalp = compat_ptr(a32.oldval); | |
1664 | newvalp = compat_ptr(a32.newval); | |
1665 | ||
1666 | if ((oldvalp && get_user(oldlen, (int __user *) compat_ptr(a32.oldlenp))) | |
1667 | || !access_ok(VERIFY_WRITE, namep, 0) | |
1668 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
1669 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
1670 | return -EFAULT; | |
1671 | ||
1672 | set_fs(KERNEL_DS); | |
1673 | lock_kernel(); | |
1674 | ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *) &oldlen, | |
1675 | newvalp, (size_t) a32.newlen); | |
1676 | unlock_kernel(); | |
1677 | set_fs(old_fs); | |
1678 | ||
1679 | if (oldvalp && put_user (oldlen, (int __user *) compat_ptr(a32.oldlenp))) | |
1680 | return -EFAULT; | |
1681 | ||
1682 | return ret; | |
1683 | } | |
1684 | #endif | |
1685 | ||
1686 | asmlinkage long | |
1687 | sys32_newuname (struct new_utsname __user *name) | |
1688 | { | |
1689 | int ret = sys_newuname(name); | |
1690 | ||
1691 | if (!ret) | |
1692 | if (copy_to_user(name->machine, "i686\0\0\0", 8)) | |
1693 | ret = -EFAULT; | |
1694 | return ret; | |
1695 | } | |
1696 | ||
1697 | asmlinkage long | |
1698 | sys32_getresuid16 (u16 __user *ruid, u16 __user *euid, u16 __user *suid) | |
1699 | { | |
1700 | uid_t a, b, c; | |
1701 | int ret; | |
1702 | mm_segment_t old_fs = get_fs(); | |
1703 | ||
1704 | set_fs(KERNEL_DS); | |
1705 | ret = sys_getresuid((uid_t __user *) &a, (uid_t __user *) &b, (uid_t __user *) &c); | |
1706 | set_fs(old_fs); | |
1707 | ||
1708 | if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid)) | |
1709 | return -EFAULT; | |
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | asmlinkage long | |
1714 | sys32_getresgid16 (u16 __user *rgid, u16 __user *egid, u16 __user *sgid) | |
1715 | { | |
1716 | gid_t a, b, c; | |
1717 | int ret; | |
1718 | mm_segment_t old_fs = get_fs(); | |
1719 | ||
1720 | set_fs(KERNEL_DS); | |
1721 | ret = sys_getresgid((gid_t __user *) &a, (gid_t __user *) &b, (gid_t __user *) &c); | |
1722 | set_fs(old_fs); | |
1723 | ||
1724 | if (ret) | |
1725 | return ret; | |
1726 | ||
1727 | return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid); | |
1728 | } | |
1729 | ||
1730 | asmlinkage long | |
1731 | sys32_lseek (unsigned int fd, int offset, unsigned int whence) | |
1732 | { | |
1733 | /* Sign-extension of "offset" is important here... */ | |
1734 | return sys_lseek(fd, offset, whence); | |
1735 | } | |
1736 | ||
1737 | static int | |
1738 | groups16_to_user(short __user *grouplist, struct group_info *group_info) | |
1739 | { | |
1740 | int i; | |
1741 | short group; | |
1742 | ||
1743 | for (i = 0; i < group_info->ngroups; i++) { | |
1744 | group = (short)GROUP_AT(group_info, i); | |
1745 | if (put_user(group, grouplist+i)) | |
1746 | return -EFAULT; | |
1747 | } | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | static int | |
1753 | groups16_from_user(struct group_info *group_info, short __user *grouplist) | |
1754 | { | |
1755 | int i; | |
1756 | short group; | |
1757 | ||
1758 | for (i = 0; i < group_info->ngroups; i++) { | |
1759 | if (get_user(group, grouplist+i)) | |
1760 | return -EFAULT; | |
1761 | GROUP_AT(group_info, i) = (gid_t)group; | |
1762 | } | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | asmlinkage long | |
1768 | sys32_getgroups16 (int gidsetsize, short __user *grouplist) | |
1769 | { | |
86a264ab | 1770 | const struct cred *cred = current_cred(); |
1da177e4 LT |
1771 | int i; |
1772 | ||
1773 | if (gidsetsize < 0) | |
1774 | return -EINVAL; | |
1775 | ||
86a264ab | 1776 | i = cred->group_info->ngroups; |
1da177e4 LT |
1777 | if (gidsetsize) { |
1778 | if (i > gidsetsize) { | |
1779 | i = -EINVAL; | |
1780 | goto out; | |
1781 | } | |
86a264ab | 1782 | if (groups16_to_user(grouplist, cred->group_info)) { |
1da177e4 LT |
1783 | i = -EFAULT; |
1784 | goto out; | |
1785 | } | |
1786 | } | |
1787 | out: | |
1da177e4 LT |
1788 | return i; |
1789 | } | |
1790 | ||
1791 | asmlinkage long | |
1792 | sys32_setgroups16 (int gidsetsize, short __user *grouplist) | |
1793 | { | |
1794 | struct group_info *group_info; | |
1795 | int retval; | |
1796 | ||
1797 | if (!capable(CAP_SETGID)) | |
1798 | return -EPERM; | |
1799 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
1800 | return -EINVAL; | |
1801 | ||
1802 | group_info = groups_alloc(gidsetsize); | |
1803 | if (!group_info) | |
1804 | return -ENOMEM; | |
1805 | retval = groups16_from_user(group_info, grouplist); | |
1806 | if (retval) { | |
1807 | put_group_info(group_info); | |
1808 | return retval; | |
1809 | } | |
1810 | ||
1811 | retval = set_current_groups(group_info); | |
1812 | put_group_info(group_info); | |
1813 | ||
1814 | return retval; | |
1815 | } | |
1816 | ||
1817 | asmlinkage long | |
1818 | sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi) | |
1819 | { | |
1820 | return sys_truncate(compat_ptr(path), ((unsigned long) len_hi << 32) | len_lo); | |
1821 | } | |
1822 | ||
1823 | asmlinkage long | |
1824 | sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi) | |
1825 | { | |
1826 | return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo); | |
1827 | } | |
1828 | ||
1829 | static int | |
1830 | putstat64 (struct stat64 __user *ubuf, struct kstat *kbuf) | |
1831 | { | |
1832 | int err; | |
1833 | u64 hdev; | |
1834 | ||
1835 | if (clear_user(ubuf, sizeof(*ubuf))) | |
1836 | return -EFAULT; | |
1837 | ||
1838 | hdev = huge_encode_dev(kbuf->dev); | |
1839 | err = __put_user(hdev, (u32 __user*)&ubuf->st_dev); | |
1840 | err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_dev) + 1); | |
1841 | err |= __put_user(kbuf->ino, &ubuf->__st_ino); | |
1842 | err |= __put_user(kbuf->ino, &ubuf->st_ino_lo); | |
1843 | err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi); | |
1844 | err |= __put_user(kbuf->mode, &ubuf->st_mode); | |
1845 | err |= __put_user(kbuf->nlink, &ubuf->st_nlink); | |
1846 | err |= __put_user(kbuf->uid, &ubuf->st_uid); | |
1847 | err |= __put_user(kbuf->gid, &ubuf->st_gid); | |
1848 | hdev = huge_encode_dev(kbuf->rdev); | |
1849 | err = __put_user(hdev, (u32 __user*)&ubuf->st_rdev); | |
1850 | err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_rdev) + 1); | |
1851 | err |= __put_user(kbuf->size, &ubuf->st_size_lo); | |
1852 | err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi); | |
1853 | err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime); | |
1854 | err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec); | |
1855 | err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime); | |
1856 | err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec); | |
1857 | err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime); | |
1858 | err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec); | |
1859 | err |= __put_user(kbuf->blksize, &ubuf->st_blksize); | |
1860 | err |= __put_user(kbuf->blocks, &ubuf->st_blocks); | |
1861 | return err; | |
1862 | } | |
1863 | ||
1864 | asmlinkage long | |
1865 | sys32_stat64 (char __user *filename, struct stat64 __user *statbuf) | |
1866 | { | |
1867 | struct kstat s; | |
1868 | long ret = vfs_stat(filename, &s); | |
1869 | if (!ret) | |
1870 | ret = putstat64(statbuf, &s); | |
1871 | return ret; | |
1872 | } | |
1873 | ||
1874 | asmlinkage long | |
1875 | sys32_lstat64 (char __user *filename, struct stat64 __user *statbuf) | |
1876 | { | |
1877 | struct kstat s; | |
1878 | long ret = vfs_lstat(filename, &s); | |
1879 | if (!ret) | |
1880 | ret = putstat64(statbuf, &s); | |
1881 | return ret; | |
1882 | } | |
1883 | ||
1884 | asmlinkage long | |
1885 | sys32_fstat64 (unsigned int fd, struct stat64 __user *statbuf) | |
1886 | { | |
1887 | struct kstat s; | |
1888 | long ret = vfs_fstat(fd, &s); | |
1889 | if (!ret) | |
1890 | ret = putstat64(statbuf, &s); | |
1891 | return ret; | |
1892 | } | |
1893 | ||
1da177e4 LT |
1894 | asmlinkage long |
1895 | sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec __user *interval) | |
1896 | { | |
1897 | mm_segment_t old_fs = get_fs(); | |
1898 | struct timespec t; | |
1899 | long ret; | |
1900 | ||
1901 | set_fs(KERNEL_DS); | |
1902 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t); | |
1903 | set_fs(old_fs); | |
1904 | if (put_compat_timespec(&t, interval)) | |
1905 | return -EFAULT; | |
1906 | return ret; | |
1907 | } | |
1908 | ||
1909 | asmlinkage long | |
1910 | sys32_pread (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi) | |
1911 | { | |
1912 | return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo); | |
1913 | } | |
1914 | ||
1915 | asmlinkage long | |
1916 | sys32_pwrite (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi) | |
1917 | { | |
1918 | return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo); | |
1919 | } | |
1920 | ||
1921 | asmlinkage long | |
1922 | sys32_sendfile (int out_fd, int in_fd, int __user *offset, unsigned int count) | |
1923 | { | |
1924 | mm_segment_t old_fs = get_fs(); | |
1925 | long ret; | |
1926 | off_t of; | |
1927 | ||
1928 | if (offset && get_user(of, offset)) | |
1929 | return -EFAULT; | |
1930 | ||
1931 | set_fs(KERNEL_DS); | |
1932 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *) &of : NULL, count); | |
1933 | set_fs(old_fs); | |
1934 | ||
83b942bd | 1935 | if (offset && put_user(of, offset)) |
1da177e4 LT |
1936 | return -EFAULT; |
1937 | ||
1938 | return ret; | |
1939 | } | |
1940 | ||
1941 | asmlinkage long | |
1942 | sys32_personality (unsigned int personality) | |
1943 | { | |
1944 | long ret; | |
1945 | ||
1946 | if (current->personality == PER_LINUX32 && personality == PER_LINUX) | |
1947 | personality = PER_LINUX32; | |
1948 | ret = sys_personality(personality); | |
1949 | if (ret == PER_LINUX32) | |
1950 | ret = PER_LINUX; | |
1951 | return ret; | |
1952 | } | |
1953 | ||
1954 | asmlinkage unsigned long | |
1955 | sys32_brk (unsigned int brk) | |
1956 | { | |
1957 | unsigned long ret, obrk; | |
1958 | struct mm_struct *mm = current->mm; | |
1959 | ||
1960 | obrk = mm->brk; | |
1961 | ret = sys_brk(brk); | |
1962 | if (ret < obrk) | |
1963 | clear_user(compat_ptr(ret), PAGE_ALIGN(ret) - ret); | |
1964 | return ret; | |
1965 | } | |
1966 | ||
1da177e4 LT |
1967 | /* Structure for ia32 emulation on ia64 */ |
1968 | struct epoll_event32 | |
1969 | { | |
1970 | u32 events; | |
1971 | u32 data[2]; | |
1972 | }; | |
1973 | ||
1974 | asmlinkage long | |
1975 | sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 __user *event) | |
1976 | { | |
1977 | mm_segment_t old_fs = get_fs(); | |
1978 | struct epoll_event event64; | |
1979 | int error; | |
1980 | u32 data_halfword; | |
1981 | ||
1982 | if (!access_ok(VERIFY_READ, event, sizeof(struct epoll_event32))) | |
1983 | return -EFAULT; | |
1984 | ||
1985 | __get_user(event64.events, &event->events); | |
1986 | __get_user(data_halfword, &event->data[0]); | |
1987 | event64.data = data_halfword; | |
1988 | __get_user(data_halfword, &event->data[1]); | |
1989 | event64.data |= (u64)data_halfword << 32; | |
1990 | ||
1991 | set_fs(KERNEL_DS); | |
1992 | error = sys_epoll_ctl(epfd, op, fd, (struct epoll_event __user *) &event64); | |
1993 | set_fs(old_fs); | |
1994 | ||
1995 | return error; | |
1996 | } | |
1997 | ||
1998 | asmlinkage long | |
1999 | sys32_epoll_wait(int epfd, struct epoll_event32 __user * events, int maxevents, | |
2000 | int timeout) | |
2001 | { | |
2002 | struct epoll_event *events64 = NULL; | |
2003 | mm_segment_t old_fs = get_fs(); | |
d8caebd2 | 2004 | int numevents, size; |
1da177e4 LT |
2005 | int evt_idx; |
2006 | int do_free_pages = 0; | |
2007 | ||
2008 | if (maxevents <= 0) { | |
2009 | return -EINVAL; | |
2010 | } | |
2011 | ||
2012 | /* Verify that the area passed by the user is writeable */ | |
2013 | if (!access_ok(VERIFY_WRITE, events, maxevents * sizeof(struct epoll_event32))) | |
2014 | return -EFAULT; | |
2015 | ||
2016 | /* | |
2017 | * Allocate space for the intermediate copy. If the space needed | |
2018 | * is large enough to cause kmalloc to fail, then try again with | |
2019 | * __get_free_pages. | |
2020 | */ | |
2021 | size = maxevents * sizeof(struct epoll_event); | |
2022 | events64 = kmalloc(size, GFP_KERNEL); | |
2023 | if (events64 == NULL) { | |
2024 | events64 = (struct epoll_event *) | |
2025 | __get_free_pages(GFP_KERNEL, get_order(size)); | |
2026 | if (events64 == NULL) | |
2027 | return -ENOMEM; | |
2028 | do_free_pages = 1; | |
2029 | } | |
2030 | ||
2031 | /* Do the system call */ | |
2032 | set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/ | |
2033 | numevents = sys_epoll_wait(epfd, (struct epoll_event __user *) events64, | |
2034 | maxevents, timeout); | |
2035 | set_fs(old_fs); | |
2036 | ||
2037 | /* Don't modify userspace memory if we're returning an error */ | |
2038 | if (numevents > 0) { | |
2039 | /* Translate the 64-bit structures back into the 32-bit | |
2040 | structures */ | |
2041 | for (evt_idx = 0; evt_idx < numevents; evt_idx++) { | |
2042 | __put_user(events64[evt_idx].events, | |
2043 | &events[evt_idx].events); | |
2044 | __put_user((u32)events64[evt_idx].data, | |
2045 | &events[evt_idx].data[0]); | |
2046 | __put_user((u32)(events64[evt_idx].data >> 32), | |
2047 | &events[evt_idx].data[1]); | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | if (do_free_pages) | |
2052 | free_pages((unsigned long) events64, get_order(size)); | |
2053 | else | |
2054 | kfree(events64); | |
2055 | return numevents; | |
2056 | } | |
2057 | ||
2058 | /* | |
2059 | * Get a yet unused TLS descriptor index. | |
2060 | */ | |
2061 | static int | |
2062 | get_free_idx (void) | |
2063 | { | |
2064 | struct thread_struct *t = ¤t->thread; | |
2065 | int idx; | |
2066 | ||
2067 | for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++) | |
2068 | if (desc_empty(t->tls_array + idx)) | |
2069 | return idx + GDT_ENTRY_TLS_MIN; | |
2070 | return -ESRCH; | |
2071 | } | |
2072 | ||
75529219 SL |
2073 | static void set_tls_desc(struct task_struct *p, int idx, |
2074 | const struct ia32_user_desc *info, int n) | |
2075 | { | |
2076 | struct thread_struct *t = &p->thread; | |
2077 | struct desc_struct *desc = &t->tls_array[idx - GDT_ENTRY_TLS_MIN]; | |
2078 | int cpu; | |
2079 | ||
2080 | /* | |
2081 | * We must not get preempted while modifying the TLS. | |
2082 | */ | |
2083 | cpu = get_cpu(); | |
2084 | ||
2085 | while (n-- > 0) { | |
2086 | if (LDT_empty(info)) { | |
2087 | desc->a = 0; | |
2088 | desc->b = 0; | |
2089 | } else { | |
2090 | desc->a = LDT_entry_a(info); | |
2091 | desc->b = LDT_entry_b(info); | |
2092 | } | |
2093 | ||
2094 | ++info; | |
2095 | ++desc; | |
2096 | } | |
2097 | ||
2098 | if (t == ¤t->thread) | |
2099 | load_TLS(t, cpu); | |
2100 | ||
2101 | put_cpu(); | |
2102 | } | |
2103 | ||
1da177e4 LT |
2104 | /* |
2105 | * Set a given TLS descriptor: | |
2106 | */ | |
2107 | asmlinkage int | |
2108 | sys32_set_thread_area (struct ia32_user_desc __user *u_info) | |
2109 | { | |
1da177e4 | 2110 | struct ia32_user_desc info; |
75529219 | 2111 | int idx; |
1da177e4 LT |
2112 | |
2113 | if (copy_from_user(&info, u_info, sizeof(info))) | |
2114 | return -EFAULT; | |
2115 | idx = info.entry_number; | |
2116 | ||
2117 | /* | |
2118 | * index -1 means the kernel should try to find and allocate an empty descriptor: | |
2119 | */ | |
2120 | if (idx == -1) { | |
2121 | idx = get_free_idx(); | |
2122 | if (idx < 0) | |
2123 | return idx; | |
2124 | if (put_user(idx, &u_info->entry_number)) | |
2125 | return -EFAULT; | |
2126 | } | |
2127 | ||
2128 | if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) | |
2129 | return -EINVAL; | |
2130 | ||
75529219 | 2131 | set_tls_desc(current, idx, &info, 1); |
1da177e4 LT |
2132 | return 0; |
2133 | } | |
2134 | ||
2135 | /* | |
2136 | * Get the current Thread-Local Storage area: | |
2137 | */ | |
2138 | ||
2139 | #define GET_BASE(desc) ( \ | |
2140 | (((desc)->a >> 16) & 0x0000ffff) | \ | |
2141 | (((desc)->b << 16) & 0x00ff0000) | \ | |
2142 | ( (desc)->b & 0xff000000) ) | |
2143 | ||
2144 | #define GET_LIMIT(desc) ( \ | |
2145 | ((desc)->a & 0x0ffff) | \ | |
2146 | ((desc)->b & 0xf0000) ) | |
2147 | ||
2148 | #define GET_32BIT(desc) (((desc)->b >> 22) & 1) | |
2149 | #define GET_CONTENTS(desc) (((desc)->b >> 10) & 3) | |
2150 | #define GET_WRITABLE(desc) (((desc)->b >> 9) & 1) | |
2151 | #define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1) | |
2152 | #define GET_PRESENT(desc) (((desc)->b >> 15) & 1) | |
2153 | #define GET_USEABLE(desc) (((desc)->b >> 20) & 1) | |
2154 | ||
75529219 SL |
2155 | static void fill_user_desc(struct ia32_user_desc *info, int idx, |
2156 | const struct desc_struct *desc) | |
2157 | { | |
2158 | info->entry_number = idx; | |
2159 | info->base_addr = GET_BASE(desc); | |
2160 | info->limit = GET_LIMIT(desc); | |
2161 | info->seg_32bit = GET_32BIT(desc); | |
2162 | info->contents = GET_CONTENTS(desc); | |
2163 | info->read_exec_only = !GET_WRITABLE(desc); | |
2164 | info->limit_in_pages = GET_LIMIT_PAGES(desc); | |
2165 | info->seg_not_present = !GET_PRESENT(desc); | |
2166 | info->useable = GET_USEABLE(desc); | |
2167 | } | |
2168 | ||
1da177e4 LT |
2169 | asmlinkage int |
2170 | sys32_get_thread_area (struct ia32_user_desc __user *u_info) | |
2171 | { | |
2172 | struct ia32_user_desc info; | |
2173 | struct desc_struct *desc; | |
2174 | int idx; | |
2175 | ||
2176 | if (get_user(idx, &u_info->entry_number)) | |
2177 | return -EFAULT; | |
2178 | if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX) | |
2179 | return -EINVAL; | |
2180 | ||
2181 | desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN; | |
75529219 | 2182 | fill_user_desc(&info, idx, desc); |
1da177e4 LT |
2183 | |
2184 | if (copy_to_user(u_info, &info, sizeof(info))) | |
2185 | return -EFAULT; | |
2186 | return 0; | |
2187 | } | |
2188 | ||
75529219 SL |
2189 | struct regset_get { |
2190 | void *kbuf; | |
2191 | void __user *ubuf; | |
2192 | }; | |
2193 | ||
2194 | struct regset_set { | |
2195 | const void *kbuf; | |
2196 | const void __user *ubuf; | |
2197 | }; | |
2198 | ||
2199 | struct regset_getset { | |
2200 | struct task_struct *target; | |
2201 | const struct user_regset *regset; | |
2202 | union { | |
2203 | struct regset_get get; | |
2204 | struct regset_set set; | |
2205 | } u; | |
2206 | unsigned int pos; | |
2207 | unsigned int count; | |
2208 | int ret; | |
2209 | }; | |
2210 | ||
2211 | static void getfpreg(struct task_struct *task, int regno, int *val) | |
2212 | { | |
2213 | switch (regno / sizeof(int)) { | |
2214 | case 0: | |
2215 | *val = task->thread.fcr & 0xffff; | |
2216 | break; | |
2217 | case 1: | |
2218 | *val = task->thread.fsr & 0xffff; | |
2219 | break; | |
2220 | case 2: | |
2221 | *val = (task->thread.fsr>>16) & 0xffff; | |
2222 | break; | |
2223 | case 3: | |
2224 | *val = task->thread.fir; | |
2225 | break; | |
2226 | case 4: | |
2227 | *val = (task->thread.fir>>32) & 0xffff; | |
2228 | break; | |
2229 | case 5: | |
2230 | *val = task->thread.fdr; | |
2231 | break; | |
2232 | case 6: | |
2233 | *val = (task->thread.fdr >> 32) & 0xffff; | |
2234 | break; | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | static void setfpreg(struct task_struct *task, int regno, int val) | |
2239 | { | |
2240 | switch (regno / sizeof(int)) { | |
2241 | case 0: | |
2242 | task->thread.fcr = (task->thread.fcr & (~0x1f3f)) | |
2243 | | (val & 0x1f3f); | |
2244 | break; | |
2245 | case 1: | |
2246 | task->thread.fsr = (task->thread.fsr & (~0xffff)) | val; | |
2247 | break; | |
2248 | case 2: | |
2249 | task->thread.fsr = (task->thread.fsr & (~0xffff0000)) | |
2250 | | (val << 16); | |
2251 | break; | |
2252 | case 3: | |
2253 | task->thread.fir = (task->thread.fir & (~0xffffffff)) | val; | |
2254 | break; | |
2255 | case 5: | |
2256 | task->thread.fdr = (task->thread.fdr & (~0xffffffff)) | val; | |
2257 | break; | |
2258 | } | |
2259 | } | |
2260 | ||
2261 | static void access_fpreg_ia32(int regno, void *reg, | |
2262 | struct pt_regs *pt, struct switch_stack *sw, | |
2263 | int tos, int write) | |
2264 | { | |
2265 | void *f; | |
2266 | ||
2267 | if ((regno += tos) >= 8) | |
2268 | regno -= 8; | |
2269 | if (regno < 4) | |
2270 | f = &pt->f8 + regno; | |
2271 | else if (regno <= 7) | |
2272 | f = &sw->f12 + (regno - 4); | |
2273 | else { | |
2274 | printk(KERN_ERR "regno must be less than 7 \n"); | |
2275 | return; | |
2276 | } | |
2277 | ||
2278 | if (write) | |
2279 | memcpy(f, reg, sizeof(struct _fpreg_ia32)); | |
2280 | else | |
2281 | memcpy(reg, f, sizeof(struct _fpreg_ia32)); | |
2282 | } | |
2283 | ||
2284 | static void do_fpregs_get(struct unw_frame_info *info, void *arg) | |
2285 | { | |
2286 | struct regset_getset *dst = arg; | |
2287 | struct task_struct *task = dst->target; | |
2288 | struct pt_regs *pt; | |
2289 | int start, end, tos; | |
2290 | char buf[80]; | |
2291 | ||
2292 | if (dst->count == 0 || unw_unwind_to_user(info) < 0) | |
2293 | return; | |
2294 | if (dst->pos < 7 * sizeof(int)) { | |
2295 | end = min((dst->pos + dst->count), | |
2296 | (unsigned int)(7 * sizeof(int))); | |
2297 | for (start = dst->pos; start < end; start += sizeof(int)) | |
2298 | getfpreg(task, start, (int *)(buf + start)); | |
2299 | dst->ret = user_regset_copyout(&dst->pos, &dst->count, | |
2300 | &dst->u.get.kbuf, &dst->u.get.ubuf, buf, | |
2301 | 0, 7 * sizeof(int)); | |
2302 | if (dst->ret || dst->count == 0) | |
2303 | return; | |
2304 | } | |
2305 | if (dst->pos < sizeof(struct ia32_user_i387_struct)) { | |
2306 | pt = task_pt_regs(task); | |
2307 | tos = (task->thread.fsr >> 11) & 7; | |
2308 | end = min(dst->pos + dst->count, | |
2309 | (unsigned int)(sizeof(struct ia32_user_i387_struct))); | |
2310 | start = (dst->pos - 7 * sizeof(int)) / | |
2311 | sizeof(struct _fpreg_ia32); | |
2312 | end = (end - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32); | |
2313 | for (; start < end; start++) | |
2314 | access_fpreg_ia32(start, | |
2315 | (struct _fpreg_ia32 *)buf + start, | |
2316 | pt, info->sw, tos, 0); | |
2317 | dst->ret = user_regset_copyout(&dst->pos, &dst->count, | |
2318 | &dst->u.get.kbuf, &dst->u.get.ubuf, | |
2319 | buf, 7 * sizeof(int), | |
2320 | sizeof(struct ia32_user_i387_struct)); | |
2321 | if (dst->ret || dst->count == 0) | |
2322 | return; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | static void do_fpregs_set(struct unw_frame_info *info, void *arg) | |
2327 | { | |
2328 | struct regset_getset *dst = arg; | |
2329 | struct task_struct *task = dst->target; | |
2330 | struct pt_regs *pt; | |
2331 | char buf[80]; | |
2332 | int end, start, tos; | |
2333 | ||
2334 | if (dst->count == 0 || unw_unwind_to_user(info) < 0) | |
2335 | return; | |
2336 | ||
2337 | if (dst->pos < 7 * sizeof(int)) { | |
2338 | start = dst->pos; | |
2339 | dst->ret = user_regset_copyin(&dst->pos, &dst->count, | |
2340 | &dst->u.set.kbuf, &dst->u.set.ubuf, buf, | |
2341 | 0, 7 * sizeof(int)); | |
2342 | if (dst->ret) | |
2343 | return; | |
2344 | for (; start < dst->pos; start += sizeof(int)) | |
2345 | setfpreg(task, start, *((int *)(buf + start))); | |
2346 | if (dst->count == 0) | |
2347 | return; | |
2348 | } | |
2349 | if (dst->pos < sizeof(struct ia32_user_i387_struct)) { | |
2350 | start = (dst->pos - 7 * sizeof(int)) / | |
2351 | sizeof(struct _fpreg_ia32); | |
2352 | dst->ret = user_regset_copyin(&dst->pos, &dst->count, | |
2353 | &dst->u.set.kbuf, &dst->u.set.ubuf, | |
2354 | buf, 7 * sizeof(int), | |
2355 | sizeof(struct ia32_user_i387_struct)); | |
2356 | if (dst->ret) | |
2357 | return; | |
2358 | pt = task_pt_regs(task); | |
2359 | tos = (task->thread.fsr >> 11) & 7; | |
2360 | end = (dst->pos - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32); | |
2361 | for (; start < end; start++) | |
2362 | access_fpreg_ia32(start, | |
2363 | (struct _fpreg_ia32 *)buf + start, | |
2364 | pt, info->sw, tos, 1); | |
2365 | if (dst->count == 0) | |
2366 | return; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | #define OFFSET(member) ((int)(offsetof(struct ia32_user_fxsr_struct, member))) | |
2371 | static void getfpxreg(struct task_struct *task, int start, int end, char *buf) | |
2372 | { | |
2373 | int min_val; | |
2374 | ||
2375 | min_val = min(end, OFFSET(fop)); | |
2376 | while (start < min_val) { | |
2377 | if (start == OFFSET(cwd)) | |
2378 | *((short *)buf) = task->thread.fcr & 0xffff; | |
2379 | else if (start == OFFSET(swd)) | |
2380 | *((short *)buf) = task->thread.fsr & 0xffff; | |
2381 | else if (start == OFFSET(twd)) | |
2382 | *((short *)buf) = (task->thread.fsr>>16) & 0xffff; | |
2383 | buf += 2; | |
2384 | start += 2; | |
2385 | } | |
2386 | /* skip fop element */ | |
2387 | if (start == OFFSET(fop)) { | |
2388 | start += 2; | |
2389 | buf += 2; | |
2390 | } | |
2391 | while (start < end) { | |
2392 | if (start == OFFSET(fip)) | |
2393 | *((int *)buf) = task->thread.fir; | |
2394 | else if (start == OFFSET(fcs)) | |
2395 | *((int *)buf) = (task->thread.fir>>32) & 0xffff; | |
2396 | else if (start == OFFSET(foo)) | |
2397 | *((int *)buf) = task->thread.fdr; | |
2398 | else if (start == OFFSET(fos)) | |
2399 | *((int *)buf) = (task->thread.fdr>>32) & 0xffff; | |
2400 | else if (start == OFFSET(mxcsr)) | |
2401 | *((int *)buf) = ((task->thread.fcr>>32) & 0xff80) | |
2402 | | ((task->thread.fsr>>32) & 0x3f); | |
2403 | buf += 4; | |
2404 | start += 4; | |
2405 | } | |
2406 | } | |
2407 | ||
2408 | static void setfpxreg(struct task_struct *task, int start, int end, char *buf) | |
2409 | { | |
2410 | int min_val, num32; | |
2411 | short num; | |
2412 | unsigned long num64; | |
2413 | ||
2414 | min_val = min(end, OFFSET(fop)); | |
2415 | while (start < min_val) { | |
2416 | num = *((short *)buf); | |
2417 | if (start == OFFSET(cwd)) { | |
2418 | task->thread.fcr = (task->thread.fcr & (~0x1f3f)) | |
2419 | | (num & 0x1f3f); | |
2420 | } else if (start == OFFSET(swd)) { | |
2421 | task->thread.fsr = (task->thread.fsr & (~0xffff)) | num; | |
2422 | } else if (start == OFFSET(twd)) { | |
2423 | task->thread.fsr = (task->thread.fsr & (~0xffff0000)) | |
2424 | | (((int)num) << 16); | |
2425 | } | |
2426 | buf += 2; | |
2427 | start += 2; | |
2428 | } | |
2429 | /* skip fop element */ | |
2430 | if (start == OFFSET(fop)) { | |
2431 | start += 2; | |
2432 | buf += 2; | |
2433 | } | |
2434 | while (start < end) { | |
2435 | num32 = *((int *)buf); | |
2436 | if (start == OFFSET(fip)) | |
2437 | task->thread.fir = (task->thread.fir & (~0xffffffff)) | |
2438 | | num32; | |
2439 | else if (start == OFFSET(foo)) | |
2440 | task->thread.fdr = (task->thread.fdr & (~0xffffffff)) | |
2441 | | num32; | |
2442 | else if (start == OFFSET(mxcsr)) { | |
2443 | num64 = num32 & 0xff10; | |
2444 | task->thread.fcr = (task->thread.fcr & | |
2445 | (~0xff1000000000UL)) | (num64<<32); | |
2446 | num64 = num32 & 0x3f; | |
2447 | task->thread.fsr = (task->thread.fsr & | |
2448 | (~0x3f00000000UL)) | (num64<<32); | |
2449 | } | |
2450 | buf += 4; | |
2451 | start += 4; | |
2452 | } | |
2453 | } | |
2454 | ||
2455 | static void do_fpxregs_get(struct unw_frame_info *info, void *arg) | |
2456 | { | |
2457 | struct regset_getset *dst = arg; | |
2458 | struct task_struct *task = dst->target; | |
2459 | struct pt_regs *pt; | |
2460 | char buf[128]; | |
2461 | int start, end, tos; | |
2462 | ||
2463 | if (dst->count == 0 || unw_unwind_to_user(info) < 0) | |
2464 | return; | |
2465 | if (dst->pos < OFFSET(st_space[0])) { | |
2466 | end = min(dst->pos + dst->count, (unsigned int)32); | |
2467 | getfpxreg(task, dst->pos, end, buf); | |
2468 | dst->ret = user_regset_copyout(&dst->pos, &dst->count, | |
2469 | &dst->u.get.kbuf, &dst->u.get.ubuf, buf, | |
2470 | 0, OFFSET(st_space[0])); | |
2471 | if (dst->ret || dst->count == 0) | |
2472 | return; | |
2473 | } | |
2474 | if (dst->pos < OFFSET(xmm_space[0])) { | |
2475 | pt = task_pt_regs(task); | |
2476 | tos = (task->thread.fsr >> 11) & 7; | |
2477 | end = min(dst->pos + dst->count, | |
2478 | (unsigned int)OFFSET(xmm_space[0])); | |
2479 | start = (dst->pos - OFFSET(st_space[0])) / 16; | |
2480 | end = (end - OFFSET(st_space[0])) / 16; | |
2481 | for (; start < end; start++) | |
2482 | access_fpreg_ia32(start, buf + 16 * start, pt, | |
2483 | info->sw, tos, 0); | |
2484 | dst->ret = user_regset_copyout(&dst->pos, &dst->count, | |
2485 | &dst->u.get.kbuf, &dst->u.get.ubuf, | |
2486 | buf, OFFSET(st_space[0]), OFFSET(xmm_space[0])); | |
2487 | if (dst->ret || dst->count == 0) | |
2488 | return; | |
2489 | } | |
2490 | if (dst->pos < OFFSET(padding[0])) | |
2491 | dst->ret = user_regset_copyout(&dst->pos, &dst->count, | |
2492 | &dst->u.get.kbuf, &dst->u.get.ubuf, | |
2493 | &info->sw->f16, OFFSET(xmm_space[0]), | |
2494 | OFFSET(padding[0])); | |
2495 | } | |
2496 | ||
2497 | static void do_fpxregs_set(struct unw_frame_info *info, void *arg) | |
2498 | { | |
2499 | struct regset_getset *dst = arg; | |
2500 | struct task_struct *task = dst->target; | |
2501 | char buf[128]; | |
2502 | int start, end; | |
2503 | ||
2504 | if (dst->count == 0 || unw_unwind_to_user(info) < 0) | |
2505 | return; | |
2506 | ||
2507 | if (dst->pos < OFFSET(st_space[0])) { | |
2508 | start = dst->pos; | |
2509 | dst->ret = user_regset_copyin(&dst->pos, &dst->count, | |
2510 | &dst->u.set.kbuf, &dst->u.set.ubuf, | |
2511 | buf, 0, OFFSET(st_space[0])); | |
2512 | if (dst->ret) | |
2513 | return; | |
2514 | setfpxreg(task, start, dst->pos, buf); | |
2515 | if (dst->count == 0) | |
2516 | return; | |
2517 | } | |
2518 | if (dst->pos < OFFSET(xmm_space[0])) { | |
2519 | struct pt_regs *pt; | |
2520 | int tos; | |
2521 | pt = task_pt_regs(task); | |
2522 | tos = (task->thread.fsr >> 11) & 7; | |
2523 | start = (dst->pos - OFFSET(st_space[0])) / 16; | |
2524 | dst->ret = user_regset_copyin(&dst->pos, &dst->count, | |
2525 | &dst->u.set.kbuf, &dst->u.set.ubuf, | |
2526 | buf, OFFSET(st_space[0]), OFFSET(xmm_space[0])); | |
2527 | if (dst->ret) | |
2528 | return; | |
2529 | end = (dst->pos - OFFSET(st_space[0])) / 16; | |
2530 | for (; start < end; start++) | |
2531 | access_fpreg_ia32(start, buf + 16 * start, pt, info->sw, | |
2532 | tos, 1); | |
2533 | if (dst->count == 0) | |
2534 | return; | |
2535 | } | |
2536 | if (dst->pos < OFFSET(padding[0])) | |
2537 | dst->ret = user_regset_copyin(&dst->pos, &dst->count, | |
2538 | &dst->u.set.kbuf, &dst->u.set.ubuf, | |
2539 | &info->sw->f16, OFFSET(xmm_space[0]), | |
2540 | OFFSET(padding[0])); | |
2541 | } | |
2542 | #undef OFFSET | |
2543 | ||
2544 | static int do_regset_call(void (*call)(struct unw_frame_info *, void *), | |
2545 | struct task_struct *target, | |
2546 | const struct user_regset *regset, | |
2547 | unsigned int pos, unsigned int count, | |
2548 | const void *kbuf, const void __user *ubuf) | |
2549 | { | |
2550 | struct regset_getset info = { .target = target, .regset = regset, | |
2551 | .pos = pos, .count = count, | |
2552 | .u.set = { .kbuf = kbuf, .ubuf = ubuf }, | |
2553 | .ret = 0 }; | |
2554 | ||
2555 | if (target == current) | |
2556 | unw_init_running(call, &info); | |
2557 | else { | |
2558 | struct unw_frame_info ufi; | |
2559 | memset(&ufi, 0, sizeof(ufi)); | |
2560 | unw_init_from_blocked_task(&ufi, target); | |
2561 | (*call)(&ufi, &info); | |
2562 | } | |
2563 | ||
2564 | return info.ret; | |
2565 | } | |
2566 | ||
2567 | static int ia32_fpregs_get(struct task_struct *target, | |
2568 | const struct user_regset *regset, | |
2569 | unsigned int pos, unsigned int count, | |
2570 | void *kbuf, void __user *ubuf) | |
2571 | { | |
2572 | return do_regset_call(do_fpregs_get, target, regset, pos, count, | |
2573 | kbuf, ubuf); | |
2574 | } | |
2575 | ||
2576 | static int ia32_fpregs_set(struct task_struct *target, | |
2577 | const struct user_regset *regset, | |
2578 | unsigned int pos, unsigned int count, | |
2579 | const void *kbuf, const void __user *ubuf) | |
2580 | { | |
2581 | return do_regset_call(do_fpregs_set, target, regset, pos, count, | |
2582 | kbuf, ubuf); | |
2583 | } | |
2584 | ||
2585 | static int ia32_fpxregs_get(struct task_struct *target, | |
2586 | const struct user_regset *regset, | |
2587 | unsigned int pos, unsigned int count, | |
2588 | void *kbuf, void __user *ubuf) | |
2589 | { | |
2590 | return do_regset_call(do_fpxregs_get, target, regset, pos, count, | |
2591 | kbuf, ubuf); | |
2592 | } | |
2593 | ||
2594 | static int ia32_fpxregs_set(struct task_struct *target, | |
2595 | const struct user_regset *regset, | |
2596 | unsigned int pos, unsigned int count, | |
2597 | const void *kbuf, const void __user *ubuf) | |
2598 | { | |
2599 | return do_regset_call(do_fpxregs_set, target, regset, pos, count, | |
2600 | kbuf, ubuf); | |
2601 | } | |
2602 | ||
2603 | static int ia32_genregs_get(struct task_struct *target, | |
2604 | const struct user_regset *regset, | |
2605 | unsigned int pos, unsigned int count, | |
2606 | void *kbuf, void __user *ubuf) | |
2607 | { | |
2608 | if (kbuf) { | |
2609 | u32 *kp = kbuf; | |
2610 | while (count > 0) { | |
2611 | *kp++ = getreg(target, pos); | |
2612 | pos += 4; | |
2613 | count -= 4; | |
2614 | } | |
2615 | } else { | |
2616 | u32 __user *up = ubuf; | |
2617 | while (count > 0) { | |
2618 | if (__put_user(getreg(target, pos), up++)) | |
2619 | return -EFAULT; | |
2620 | pos += 4; | |
2621 | count -= 4; | |
2622 | } | |
2623 | } | |
2624 | return 0; | |
2625 | } | |
2626 | ||
2627 | static int ia32_genregs_set(struct task_struct *target, | |
2628 | const struct user_regset *regset, | |
2629 | unsigned int pos, unsigned int count, | |
2630 | const void *kbuf, const void __user *ubuf) | |
2631 | { | |
2632 | int ret = 0; | |
2633 | ||
2634 | if (kbuf) { | |
2635 | const u32 *kp = kbuf; | |
2636 | while (!ret && count > 0) { | |
2637 | putreg(target, pos, *kp++); | |
2638 | pos += 4; | |
2639 | count -= 4; | |
2640 | } | |
2641 | } else { | |
2642 | const u32 __user *up = ubuf; | |
2643 | u32 val; | |
2644 | while (!ret && count > 0) { | |
2645 | ret = __get_user(val, up++); | |
2646 | if (!ret) | |
2647 | putreg(target, pos, val); | |
2648 | pos += 4; | |
2649 | count -= 4; | |
2650 | } | |
2651 | } | |
2652 | return ret; | |
2653 | } | |
2654 | ||
2655 | static int ia32_tls_active(struct task_struct *target, | |
2656 | const struct user_regset *regset) | |
2657 | { | |
2658 | struct thread_struct *t = &target->thread; | |
2659 | int n = GDT_ENTRY_TLS_ENTRIES; | |
2660 | while (n > 0 && desc_empty(&t->tls_array[n -1])) | |
2661 | --n; | |
2662 | return n; | |
2663 | } | |
2664 | ||
2665 | static int ia32_tls_get(struct task_struct *target, | |
2666 | const struct user_regset *regset, unsigned int pos, | |
2667 | unsigned int count, void *kbuf, void __user *ubuf) | |
2668 | { | |
2669 | const struct desc_struct *tls; | |
2670 | ||
2671 | if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) || | |
2672 | (pos % sizeof(struct ia32_user_desc)) != 0 || | |
2673 | (count % sizeof(struct ia32_user_desc)) != 0) | |
2674 | return -EINVAL; | |
2675 | ||
2676 | pos /= sizeof(struct ia32_user_desc); | |
2677 | count /= sizeof(struct ia32_user_desc); | |
2678 | ||
2679 | tls = &target->thread.tls_array[pos]; | |
2680 | ||
2681 | if (kbuf) { | |
2682 | struct ia32_user_desc *info = kbuf; | |
2683 | while (count-- > 0) | |
2684 | fill_user_desc(info++, GDT_ENTRY_TLS_MIN + pos++, | |
2685 | tls++); | |
2686 | } else { | |
2687 | struct ia32_user_desc __user *u_info = ubuf; | |
2688 | while (count-- > 0) { | |
2689 | struct ia32_user_desc info; | |
2690 | fill_user_desc(&info, GDT_ENTRY_TLS_MIN + pos++, tls++); | |
2691 | if (__copy_to_user(u_info++, &info, sizeof(info))) | |
2692 | return -EFAULT; | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | return 0; | |
2697 | } | |
2698 | ||
2699 | static int ia32_tls_set(struct task_struct *target, | |
2700 | const struct user_regset *regset, unsigned int pos, | |
2701 | unsigned int count, const void *kbuf, const void __user *ubuf) | |
2702 | { | |
2703 | struct ia32_user_desc infobuf[GDT_ENTRY_TLS_ENTRIES]; | |
2704 | const struct ia32_user_desc *info; | |
2705 | ||
2706 | if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) || | |
2707 | (pos % sizeof(struct ia32_user_desc)) != 0 || | |
2708 | (count % sizeof(struct ia32_user_desc)) != 0) | |
2709 | return -EINVAL; | |
2710 | ||
2711 | if (kbuf) | |
2712 | info = kbuf; | |
2713 | else if (__copy_from_user(infobuf, ubuf, count)) | |
2714 | return -EFAULT; | |
2715 | else | |
2716 | info = infobuf; | |
2717 | ||
2718 | set_tls_desc(target, | |
2719 | GDT_ENTRY_TLS_MIN + (pos / sizeof(struct ia32_user_desc)), | |
2720 | info, count / sizeof(struct ia32_user_desc)); | |
2721 | ||
2722 | return 0; | |
2723 | } | |
2724 | ||
2725 | /* | |
2726 | * This should match arch/i386/kernel/ptrace.c:native_regsets. | |
2727 | * XXX ioperm? vm86? | |
2728 | */ | |
2729 | static const struct user_regset ia32_regsets[] = { | |
2730 | { | |
2731 | .core_note_type = NT_PRSTATUS, | |
2732 | .n = sizeof(struct user_regs_struct32)/4, | |
2733 | .size = 4, .align = 4, | |
2734 | .get = ia32_genregs_get, .set = ia32_genregs_set | |
2735 | }, | |
2736 | { | |
2737 | .core_note_type = NT_PRFPREG, | |
2738 | .n = sizeof(struct ia32_user_i387_struct) / 4, | |
2739 | .size = 4, .align = 4, | |
2740 | .get = ia32_fpregs_get, .set = ia32_fpregs_set | |
2741 | }, | |
2742 | { | |
2743 | .core_note_type = NT_PRXFPREG, | |
2744 | .n = sizeof(struct ia32_user_fxsr_struct) / 4, | |
2745 | .size = 4, .align = 4, | |
2746 | .get = ia32_fpxregs_get, .set = ia32_fpxregs_set | |
2747 | }, | |
2748 | { | |
2749 | .core_note_type = NT_386_TLS, | |
2750 | .n = GDT_ENTRY_TLS_ENTRIES, | |
2751 | .bias = GDT_ENTRY_TLS_MIN, | |
2752 | .size = sizeof(struct ia32_user_desc), | |
2753 | .align = sizeof(struct ia32_user_desc), | |
2754 | .active = ia32_tls_active, | |
2755 | .get = ia32_tls_get, .set = ia32_tls_set, | |
2756 | }, | |
2757 | }; | |
2758 | ||
2759 | const struct user_regset_view user_ia32_view = { | |
2760 | .name = "i386", .e_machine = EM_386, | |
2761 | .regsets = ia32_regsets, .n = ARRAY_SIZE(ia32_regsets) | |
2762 | }; | |
2763 | ||
1da177e4 LT |
2764 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
2765 | __u32 len_low, __u32 len_high, int advice) | |
2766 | { | |
2767 | return sys_fadvise64_64(fd, | |
2768 | (((u64)offset_high)<<32) | offset_low, | |
2769 | (((u64)len_high)<<32) | len_low, | |
2770 | advice); | |
2771 | } | |
2772 | ||
2773 | #ifdef NOTYET /* UNTESTED FOR IA64 FROM HERE DOWN */ | |
2774 | ||
2775 | asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid) | |
2776 | { | |
2777 | uid_t sruid, seuid; | |
2778 | ||
2779 | sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid); | |
2780 | seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid); | |
2781 | return sys_setreuid(sruid, seuid); | |
2782 | } | |
2783 | ||
2784 | asmlinkage long | |
2785 | sys32_setresuid(compat_uid_t ruid, compat_uid_t euid, | |
2786 | compat_uid_t suid) | |
2787 | { | |
2788 | uid_t sruid, seuid, ssuid; | |
2789 | ||
2790 | sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid); | |
2791 | seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid); | |
2792 | ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid); | |
2793 | return sys_setresuid(sruid, seuid, ssuid); | |
2794 | } | |
2795 | ||
2796 | asmlinkage long | |
2797 | sys32_setregid(compat_gid_t rgid, compat_gid_t egid) | |
2798 | { | |
2799 | gid_t srgid, segid; | |
2800 | ||
2801 | srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid); | |
2802 | segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid); | |
2803 | return sys_setregid(srgid, segid); | |
2804 | } | |
2805 | ||
2806 | asmlinkage long | |
2807 | sys32_setresgid(compat_gid_t rgid, compat_gid_t egid, | |
2808 | compat_gid_t sgid) | |
2809 | { | |
2810 | gid_t srgid, segid, ssgid; | |
2811 | ||
2812 | srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid); | |
2813 | segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid); | |
2814 | ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid); | |
2815 | return sys_setresgid(srgid, segid, ssgid); | |
2816 | } | |
1da177e4 | 2817 | #endif /* NOTYET */ |