Root/
1 | /* |
2 | * linux/kernel/compat.c |
3 | * |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support |
5 | * on 64 bit kernels. |
6 | * |
7 | * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License version 2 as |
11 | * published by the Free Software Foundation. |
12 | */ |
13 | |
14 | #include <linux/linkage.h> |
15 | #include <linux/compat.h> |
16 | #include <linux/errno.h> |
17 | #include <linux/time.h> |
18 | #include <linux/signal.h> |
19 | #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */ |
20 | #include <linux/syscalls.h> |
21 | #include <linux/unistd.h> |
22 | #include <linux/security.h> |
23 | #include <linux/timex.h> |
24 | #include <linux/migrate.h> |
25 | #include <linux/posix-timers.h> |
26 | #include <linux/times.h> |
27 | #include <linux/ptrace.h> |
28 | |
29 | #include <asm/uaccess.h> |
30 | |
31 | /* |
32 | * Note that the native side is already converted to a timespec, because |
33 | * that's what we want anyway. |
34 | */ |
35 | static int compat_get_timeval(struct timespec *o, |
36 | struct compat_timeval __user *i) |
37 | { |
38 | long usec; |
39 | |
40 | if (get_user(o->tv_sec, &i->tv_sec) || |
41 | get_user(usec, &i->tv_usec)) |
42 | return -EFAULT; |
43 | o->tv_nsec = usec * 1000; |
44 | return 0; |
45 | } |
46 | |
47 | static int compat_put_timeval(struct compat_timeval __user *o, |
48 | struct timeval *i) |
49 | { |
50 | return (put_user(i->tv_sec, &o->tv_sec) || |
51 | put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; |
52 | } |
53 | |
54 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
55 | struct timezone __user *tz) |
56 | { |
57 | if (tv) { |
58 | struct timeval ktv; |
59 | do_gettimeofday(&ktv); |
60 | if (compat_put_timeval(tv, &ktv)) |
61 | return -EFAULT; |
62 | } |
63 | if (tz) { |
64 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
65 | return -EFAULT; |
66 | } |
67 | |
68 | return 0; |
69 | } |
70 | |
71 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, |
72 | struct timezone __user *tz) |
73 | { |
74 | struct timespec kts; |
75 | struct timezone ktz; |
76 | |
77 | if (tv) { |
78 | if (compat_get_timeval(&kts, tv)) |
79 | return -EFAULT; |
80 | } |
81 | if (tz) { |
82 | if (copy_from_user(&ktz, tz, sizeof(ktz))) |
83 | return -EFAULT; |
84 | } |
85 | |
86 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
87 | } |
88 | |
89 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
90 | { |
91 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || |
92 | __get_user(ts->tv_sec, &cts->tv_sec) || |
93 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
94 | } |
95 | |
96 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
97 | { |
98 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || |
99 | __put_user(ts->tv_sec, &cts->tv_sec) || |
100 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
101 | } |
102 | |
103 | static long compat_nanosleep_restart(struct restart_block *restart) |
104 | { |
105 | struct compat_timespec __user *rmtp; |
106 | struct timespec rmt; |
107 | mm_segment_t oldfs; |
108 | long ret; |
109 | |
110 | restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
111 | oldfs = get_fs(); |
112 | set_fs(KERNEL_DS); |
113 | ret = hrtimer_nanosleep_restart(restart); |
114 | set_fs(oldfs); |
115 | |
116 | if (ret) { |
117 | rmtp = restart->nanosleep.compat_rmtp; |
118 | |
119 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
120 | return -EFAULT; |
121 | } |
122 | |
123 | return ret; |
124 | } |
125 | |
126 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
127 | struct compat_timespec __user *rmtp) |
128 | { |
129 | struct timespec tu, rmt; |
130 | mm_segment_t oldfs; |
131 | long ret; |
132 | |
133 | if (get_compat_timespec(&tu, rqtp)) |
134 | return -EFAULT; |
135 | |
136 | if (!timespec_valid(&tu)) |
137 | return -EINVAL; |
138 | |
139 | oldfs = get_fs(); |
140 | set_fs(KERNEL_DS); |
141 | ret = hrtimer_nanosleep(&tu, |
142 | rmtp ? (struct timespec __user *)&rmt : NULL, |
143 | HRTIMER_MODE_REL, CLOCK_MONOTONIC); |
144 | set_fs(oldfs); |
145 | |
146 | if (ret) { |
147 | struct restart_block *restart |
148 | = ¤t_thread_info()->restart_block; |
149 | |
150 | restart->fn = compat_nanosleep_restart; |
151 | restart->nanosleep.compat_rmtp = rmtp; |
152 | |
153 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
154 | return -EFAULT; |
155 | } |
156 | |
157 | return ret; |
158 | } |
159 | |
160 | static inline long get_compat_itimerval(struct itimerval *o, |
161 | struct compat_itimerval __user *i) |
162 | { |
163 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || |
164 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | |
165 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | |
166 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | |
167 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); |
168 | } |
169 | |
170 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, |
171 | struct itimerval *i) |
172 | { |
173 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || |
174 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | |
175 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | |
176 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | |
177 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); |
178 | } |
179 | |
180 | asmlinkage long compat_sys_getitimer(int which, |
181 | struct compat_itimerval __user *it) |
182 | { |
183 | struct itimerval kit; |
184 | int error; |
185 | |
186 | error = do_getitimer(which, &kit); |
187 | if (!error && put_compat_itimerval(it, &kit)) |
188 | error = -EFAULT; |
189 | return error; |
190 | } |
191 | |
192 | asmlinkage long compat_sys_setitimer(int which, |
193 | struct compat_itimerval __user *in, |
194 | struct compat_itimerval __user *out) |
195 | { |
196 | struct itimerval kin, kout; |
197 | int error; |
198 | |
199 | if (in) { |
200 | if (get_compat_itimerval(&kin, in)) |
201 | return -EFAULT; |
202 | } else |
203 | memset(&kin, 0, sizeof(kin)); |
204 | |
205 | error = do_setitimer(which, &kin, out ? &kout : NULL); |
206 | if (error || !out) |
207 | return error; |
208 | if (put_compat_itimerval(out, &kout)) |
209 | return -EFAULT; |
210 | return 0; |
211 | } |
212 | |
213 | static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
214 | { |
215 | return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); |
216 | } |
217 | |
218 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
219 | { |
220 | if (tbuf) { |
221 | struct tms tms; |
222 | struct compat_tms tmp; |
223 | |
224 | do_sys_times(&tms); |
225 | /* Convert our struct tms to the compat version. */ |
226 | tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); |
227 | tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); |
228 | tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); |
229 | tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); |
230 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
231 | return -EFAULT; |
232 | } |
233 | force_successful_syscall_return(); |
234 | return compat_jiffies_to_clock_t(jiffies); |
235 | } |
236 | |
237 | /* |
238 | * Assumption: old_sigset_t and compat_old_sigset_t are both |
239 | * types that can be passed to put_user()/get_user(). |
240 | */ |
241 | |
242 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) |
243 | { |
244 | old_sigset_t s; |
245 | long ret; |
246 | mm_segment_t old_fs = get_fs(); |
247 | |
248 | set_fs(KERNEL_DS); |
249 | ret = sys_sigpending((old_sigset_t __user *) &s); |
250 | set_fs(old_fs); |
251 | if (ret == 0) |
252 | ret = put_user(s, set); |
253 | return ret; |
254 | } |
255 | |
256 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
257 | compat_old_sigset_t __user *oset) |
258 | { |
259 | old_sigset_t s; |
260 | long ret; |
261 | mm_segment_t old_fs; |
262 | |
263 | if (set && get_user(s, set)) |
264 | return -EFAULT; |
265 | old_fs = get_fs(); |
266 | set_fs(KERNEL_DS); |
267 | ret = sys_sigprocmask(how, |
268 | set ? (old_sigset_t __user *) &s : NULL, |
269 | oset ? (old_sigset_t __user *) &s : NULL); |
270 | set_fs(old_fs); |
271 | if (ret == 0) |
272 | if (oset) |
273 | ret = put_user(s, oset); |
274 | return ret; |
275 | } |
276 | |
277 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
278 | struct compat_rlimit __user *rlim) |
279 | { |
280 | struct rlimit r; |
281 | int ret; |
282 | mm_segment_t old_fs = get_fs (); |
283 | |
284 | if (resource >= RLIM_NLIMITS) |
285 | return -EINVAL; |
286 | |
287 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || |
288 | __get_user(r.rlim_cur, &rlim->rlim_cur) || |
289 | __get_user(r.rlim_max, &rlim->rlim_max)) |
290 | return -EFAULT; |
291 | |
292 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) |
293 | r.rlim_cur = RLIM_INFINITY; |
294 | if (r.rlim_max == COMPAT_RLIM_INFINITY) |
295 | r.rlim_max = RLIM_INFINITY; |
296 | set_fs(KERNEL_DS); |
297 | ret = sys_setrlimit(resource, (struct rlimit __user *) &r); |
298 | set_fs(old_fs); |
299 | return ret; |
300 | } |
301 | |
302 | #ifdef COMPAT_RLIM_OLD_INFINITY |
303 | |
304 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, |
305 | struct compat_rlimit __user *rlim) |
306 | { |
307 | struct rlimit r; |
308 | int ret; |
309 | mm_segment_t old_fs = get_fs(); |
310 | |
311 | set_fs(KERNEL_DS); |
312 | ret = sys_old_getrlimit(resource, &r); |
313 | set_fs(old_fs); |
314 | |
315 | if (!ret) { |
316 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) |
317 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
318 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) |
319 | r.rlim_max = COMPAT_RLIM_INFINITY; |
320 | |
321 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
322 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
323 | __put_user(r.rlim_max, &rlim->rlim_max)) |
324 | return -EFAULT; |
325 | } |
326 | return ret; |
327 | } |
328 | |
329 | #endif |
330 | |
331 | asmlinkage long compat_sys_getrlimit (unsigned int resource, |
332 | struct compat_rlimit __user *rlim) |
333 | { |
334 | struct rlimit r; |
335 | int ret; |
336 | mm_segment_t old_fs = get_fs(); |
337 | |
338 | set_fs(KERNEL_DS); |
339 | ret = sys_getrlimit(resource, (struct rlimit __user *) &r); |
340 | set_fs(old_fs); |
341 | if (!ret) { |
342 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) |
343 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
344 | if (r.rlim_max > COMPAT_RLIM_INFINITY) |
345 | r.rlim_max = COMPAT_RLIM_INFINITY; |
346 | |
347 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
348 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
349 | __put_user(r.rlim_max, &rlim->rlim_max)) |
350 | return -EFAULT; |
351 | } |
352 | return ret; |
353 | } |
354 | |
355 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) |
356 | { |
357 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || |
358 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || |
359 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || |
360 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || |
361 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || |
362 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || |
363 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || |
364 | __put_user(r->ru_idrss, &ru->ru_idrss) || |
365 | __put_user(r->ru_isrss, &ru->ru_isrss) || |
366 | __put_user(r->ru_minflt, &ru->ru_minflt) || |
367 | __put_user(r->ru_majflt, &ru->ru_majflt) || |
368 | __put_user(r->ru_nswap, &ru->ru_nswap) || |
369 | __put_user(r->ru_inblock, &ru->ru_inblock) || |
370 | __put_user(r->ru_oublock, &ru->ru_oublock) || |
371 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || |
372 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || |
373 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || |
374 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || |
375 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) |
376 | return -EFAULT; |
377 | return 0; |
378 | } |
379 | |
380 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) |
381 | { |
382 | struct rusage r; |
383 | int ret; |
384 | mm_segment_t old_fs = get_fs(); |
385 | |
386 | set_fs(KERNEL_DS); |
387 | ret = sys_getrusage(who, (struct rusage __user *) &r); |
388 | set_fs(old_fs); |
389 | |
390 | if (ret) |
391 | return ret; |
392 | |
393 | if (put_compat_rusage(&r, ru)) |
394 | return -EFAULT; |
395 | |
396 | return 0; |
397 | } |
398 | |
399 | asmlinkage long |
400 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, |
401 | struct compat_rusage __user *ru) |
402 | { |
403 | if (!ru) { |
404 | return sys_wait4(pid, stat_addr, options, NULL); |
405 | } else { |
406 | struct rusage r; |
407 | int ret; |
408 | unsigned int status; |
409 | mm_segment_t old_fs = get_fs(); |
410 | |
411 | set_fs (KERNEL_DS); |
412 | ret = sys_wait4(pid, |
413 | (stat_addr ? |
414 | (unsigned int __user *) &status : NULL), |
415 | options, (struct rusage __user *) &r); |
416 | set_fs (old_fs); |
417 | |
418 | if (ret > 0) { |
419 | if (put_compat_rusage(&r, ru)) |
420 | return -EFAULT; |
421 | if (stat_addr && put_user(status, stat_addr)) |
422 | return -EFAULT; |
423 | } |
424 | return ret; |
425 | } |
426 | } |
427 | |
428 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, |
429 | struct compat_siginfo __user *uinfo, int options, |
430 | struct compat_rusage __user *uru) |
431 | { |
432 | siginfo_t info; |
433 | struct rusage ru; |
434 | long ret; |
435 | mm_segment_t old_fs = get_fs(); |
436 | |
437 | memset(&info, 0, sizeof(info)); |
438 | |
439 | set_fs(KERNEL_DS); |
440 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, |
441 | uru ? (struct rusage __user *)&ru : NULL); |
442 | set_fs(old_fs); |
443 | |
444 | if ((ret < 0) || (info.si_signo == 0)) |
445 | return ret; |
446 | |
447 | if (uru) { |
448 | ret = put_compat_rusage(&ru, uru); |
449 | if (ret) |
450 | return ret; |
451 | } |
452 | |
453 | BUG_ON(info.si_code & __SI_MASK); |
454 | info.si_code |= __SI_CHLD; |
455 | return copy_siginfo_to_user32(uinfo, &info); |
456 | } |
457 | |
458 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
459 | unsigned len, struct cpumask *new_mask) |
460 | { |
461 | unsigned long *k; |
462 | |
463 | if (len < cpumask_size()) |
464 | memset(new_mask, 0, cpumask_size()); |
465 | else if (len > cpumask_size()) |
466 | len = cpumask_size(); |
467 | |
468 | k = cpumask_bits(new_mask); |
469 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
470 | } |
471 | |
472 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, |
473 | unsigned int len, |
474 | compat_ulong_t __user *user_mask_ptr) |
475 | { |
476 | cpumask_var_t new_mask; |
477 | int retval; |
478 | |
479 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
480 | return -ENOMEM; |
481 | |
482 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
483 | if (retval) |
484 | goto out; |
485 | |
486 | retval = sched_setaffinity(pid, new_mask); |
487 | out: |
488 | free_cpumask_var(new_mask); |
489 | return retval; |
490 | } |
491 | |
492 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, |
493 | compat_ulong_t __user *user_mask_ptr) |
494 | { |
495 | int ret; |
496 | cpumask_var_t mask; |
497 | unsigned long *k; |
498 | unsigned int min_length = cpumask_size(); |
499 | |
500 | if (nr_cpu_ids <= BITS_PER_COMPAT_LONG) |
501 | min_length = sizeof(compat_ulong_t); |
502 | |
503 | if (len < min_length) |
504 | return -EINVAL; |
505 | |
506 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
507 | return -ENOMEM; |
508 | |
509 | ret = sched_getaffinity(pid, mask); |
510 | if (ret < 0) |
511 | goto out; |
512 | |
513 | k = cpumask_bits(mask); |
514 | ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8); |
515 | if (ret == 0) |
516 | ret = min_length; |
517 | |
518 | out: |
519 | free_cpumask_var(mask); |
520 | return ret; |
521 | } |
522 | |
523 | int get_compat_itimerspec(struct itimerspec *dst, |
524 | const struct compat_itimerspec __user *src) |
525 | { |
526 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
527 | get_compat_timespec(&dst->it_value, &src->it_value)) |
528 | return -EFAULT; |
529 | return 0; |
530 | } |
531 | |
532 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
533 | const struct itimerspec *src) |
534 | { |
535 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
536 | put_compat_timespec(&src->it_value, &dst->it_value)) |
537 | return -EFAULT; |
538 | return 0; |
539 | } |
540 | |
541 | long compat_sys_timer_create(clockid_t which_clock, |
542 | struct compat_sigevent __user *timer_event_spec, |
543 | timer_t __user *created_timer_id) |
544 | { |
545 | struct sigevent __user *event = NULL; |
546 | |
547 | if (timer_event_spec) { |
548 | struct sigevent kevent; |
549 | |
550 | event = compat_alloc_user_space(sizeof(*event)); |
551 | if (get_compat_sigevent(&kevent, timer_event_spec) || |
552 | copy_to_user(event, &kevent, sizeof(*event))) |
553 | return -EFAULT; |
554 | } |
555 | |
556 | return sys_timer_create(which_clock, event, created_timer_id); |
557 | } |
558 | |
559 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
560 | struct compat_itimerspec __user *new, |
561 | struct compat_itimerspec __user *old) |
562 | { |
563 | long err; |
564 | mm_segment_t oldfs; |
565 | struct itimerspec newts, oldts; |
566 | |
567 | if (!new) |
568 | return -EINVAL; |
569 | if (get_compat_itimerspec(&newts, new)) |
570 | return -EFAULT; |
571 | oldfs = get_fs(); |
572 | set_fs(KERNEL_DS); |
573 | err = sys_timer_settime(timer_id, flags, |
574 | (struct itimerspec __user *) &newts, |
575 | (struct itimerspec __user *) &oldts); |
576 | set_fs(oldfs); |
577 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
578 | return -EFAULT; |
579 | return err; |
580 | } |
581 | |
582 | long compat_sys_timer_gettime(timer_t timer_id, |
583 | struct compat_itimerspec __user *setting) |
584 | { |
585 | long err; |
586 | mm_segment_t oldfs; |
587 | struct itimerspec ts; |
588 | |
589 | oldfs = get_fs(); |
590 | set_fs(KERNEL_DS); |
591 | err = sys_timer_gettime(timer_id, |
592 | (struct itimerspec __user *) &ts); |
593 | set_fs(oldfs); |
594 | if (!err && put_compat_itimerspec(setting, &ts)) |
595 | return -EFAULT; |
596 | return err; |
597 | } |
598 | |
599 | long compat_sys_clock_settime(clockid_t which_clock, |
600 | struct compat_timespec __user *tp) |
601 | { |
602 | long err; |
603 | mm_segment_t oldfs; |
604 | struct timespec ts; |
605 | |
606 | if (get_compat_timespec(&ts, tp)) |
607 | return -EFAULT; |
608 | oldfs = get_fs(); |
609 | set_fs(KERNEL_DS); |
610 | err = sys_clock_settime(which_clock, |
611 | (struct timespec __user *) &ts); |
612 | set_fs(oldfs); |
613 | return err; |
614 | } |
615 | |
616 | long compat_sys_clock_gettime(clockid_t which_clock, |
617 | struct compat_timespec __user *tp) |
618 | { |
619 | long err; |
620 | mm_segment_t oldfs; |
621 | struct timespec ts; |
622 | |
623 | oldfs = get_fs(); |
624 | set_fs(KERNEL_DS); |
625 | err = sys_clock_gettime(which_clock, |
626 | (struct timespec __user *) &ts); |
627 | set_fs(oldfs); |
628 | if (!err && put_compat_timespec(&ts, tp)) |
629 | return -EFAULT; |
630 | return err; |
631 | } |
632 | |
633 | long compat_sys_clock_getres(clockid_t which_clock, |
634 | struct compat_timespec __user *tp) |
635 | { |
636 | long err; |
637 | mm_segment_t oldfs; |
638 | struct timespec ts; |
639 | |
640 | oldfs = get_fs(); |
641 | set_fs(KERNEL_DS); |
642 | err = sys_clock_getres(which_clock, |
643 | (struct timespec __user *) &ts); |
644 | set_fs(oldfs); |
645 | if (!err && tp && put_compat_timespec(&ts, tp)) |
646 | return -EFAULT; |
647 | return err; |
648 | } |
649 | |
650 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
651 | { |
652 | long err; |
653 | mm_segment_t oldfs; |
654 | struct timespec tu; |
655 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
656 | |
657 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
658 | oldfs = get_fs(); |
659 | set_fs(KERNEL_DS); |
660 | err = clock_nanosleep_restart(restart); |
661 | set_fs(oldfs); |
662 | |
663 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
664 | put_compat_timespec(&tu, rmtp)) |
665 | return -EFAULT; |
666 | |
667 | if (err == -ERESTART_RESTARTBLOCK) { |
668 | restart->fn = compat_clock_nanosleep_restart; |
669 | restart->nanosleep.compat_rmtp = rmtp; |
670 | } |
671 | return err; |
672 | } |
673 | |
674 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
675 | struct compat_timespec __user *rqtp, |
676 | struct compat_timespec __user *rmtp) |
677 | { |
678 | long err; |
679 | mm_segment_t oldfs; |
680 | struct timespec in, out; |
681 | struct restart_block *restart; |
682 | |
683 | if (get_compat_timespec(&in, rqtp)) |
684 | return -EFAULT; |
685 | |
686 | oldfs = get_fs(); |
687 | set_fs(KERNEL_DS); |
688 | err = sys_clock_nanosleep(which_clock, flags, |
689 | (struct timespec __user *) &in, |
690 | (struct timespec __user *) &out); |
691 | set_fs(oldfs); |
692 | |
693 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
694 | put_compat_timespec(&out, rmtp)) |
695 | return -EFAULT; |
696 | |
697 | if (err == -ERESTART_RESTARTBLOCK) { |
698 | restart = ¤t_thread_info()->restart_block; |
699 | restart->fn = compat_clock_nanosleep_restart; |
700 | restart->nanosleep.compat_rmtp = rmtp; |
701 | } |
702 | return err; |
703 | } |
704 | |
705 | /* |
706 | * We currently only need the following fields from the sigevent |
707 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes |
708 | * sigev_notify_thread_id). The others are handled in user mode. |
709 | * We also assume that copying sigev_value.sival_int is sufficient |
710 | * to keep all the bits of sigev_value.sival_ptr intact. |
711 | */ |
712 | int get_compat_sigevent(struct sigevent *event, |
713 | const struct compat_sigevent __user *u_event) |
714 | { |
715 | memset(event, 0, sizeof(*event)); |
716 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
717 | __get_user(event->sigev_value.sival_int, |
718 | &u_event->sigev_value.sival_int) || |
719 | __get_user(event->sigev_signo, &u_event->sigev_signo) || |
720 | __get_user(event->sigev_notify, &u_event->sigev_notify) || |
721 | __get_user(event->sigev_notify_thread_id, |
722 | &u_event->sigev_notify_thread_id)) |
723 | ? -EFAULT : 0; |
724 | } |
725 | |
726 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
727 | unsigned long bitmap_size) |
728 | { |
729 | int i, j; |
730 | unsigned long m; |
731 | compat_ulong_t um; |
732 | unsigned long nr_compat_longs; |
733 | |
734 | /* align bitmap up to nearest compat_long_t boundary */ |
735 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
736 | |
737 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) |
738 | return -EFAULT; |
739 | |
740 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
741 | |
742 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
743 | m = 0; |
744 | |
745 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
746 | /* |
747 | * We dont want to read past the end of the userspace |
748 | * bitmap. We must however ensure the end of the |
749 | * kernel bitmap is zeroed. |
750 | */ |
751 | if (nr_compat_longs-- > 0) { |
752 | if (__get_user(um, umask)) |
753 | return -EFAULT; |
754 | } else { |
755 | um = 0; |
756 | } |
757 | |
758 | umask++; |
759 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); |
760 | } |
761 | *mask++ = m; |
762 | } |
763 | |
764 | return 0; |
765 | } |
766 | |
767 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, |
768 | unsigned long bitmap_size) |
769 | { |
770 | int i, j; |
771 | unsigned long m; |
772 | compat_ulong_t um; |
773 | unsigned long nr_compat_longs; |
774 | |
775 | /* align bitmap up to nearest compat_long_t boundary */ |
776 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
777 | |
778 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) |
779 | return -EFAULT; |
780 | |
781 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
782 | |
783 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
784 | m = *mask++; |
785 | |
786 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
787 | um = m; |
788 | |
789 | /* |
790 | * We dont want to write past the end of the userspace |
791 | * bitmap. |
792 | */ |
793 | if (nr_compat_longs-- > 0) { |
794 | if (__put_user(um, umask)) |
795 | return -EFAULT; |
796 | } |
797 | |
798 | umask++; |
799 | m >>= 4*sizeof(um); |
800 | m >>= 4*sizeof(um); |
801 | } |
802 | } |
803 | |
804 | return 0; |
805 | } |
806 | |
807 | void |
808 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) |
809 | { |
810 | switch (_NSIG_WORDS) { |
811 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
812 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); |
813 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); |
814 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
815 | } |
816 | } |
817 | |
818 | asmlinkage long |
819 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, |
820 | struct compat_siginfo __user *uinfo, |
821 | struct compat_timespec __user *uts, compat_size_t sigsetsize) |
822 | { |
823 | compat_sigset_t s32; |
824 | sigset_t s; |
825 | int sig; |
826 | struct timespec t; |
827 | siginfo_t info; |
828 | long ret, timeout = 0; |
829 | |
830 | if (sigsetsize != sizeof(sigset_t)) |
831 | return -EINVAL; |
832 | |
833 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) |
834 | return -EFAULT; |
835 | sigset_from_compat(&s, &s32); |
836 | sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); |
837 | signotset(&s); |
838 | |
839 | if (uts) { |
840 | if (get_compat_timespec (&t, uts)) |
841 | return -EFAULT; |
842 | if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 |
843 | || t.tv_sec < 0) |
844 | return -EINVAL; |
845 | } |
846 | |
847 | spin_lock_irq(¤t->sighand->siglock); |
848 | sig = dequeue_signal(current, &s, &info); |
849 | if (!sig) { |
850 | timeout = MAX_SCHEDULE_TIMEOUT; |
851 | if (uts) |
852 | timeout = timespec_to_jiffies(&t) |
853 | +(t.tv_sec || t.tv_nsec); |
854 | if (timeout) { |
855 | current->real_blocked = current->blocked; |
856 | sigandsets(¤t->blocked, ¤t->blocked, &s); |
857 | |
858 | recalc_sigpending(); |
859 | spin_unlock_irq(¤t->sighand->siglock); |
860 | |
861 | timeout = schedule_timeout_interruptible(timeout); |
862 | |
863 | spin_lock_irq(¤t->sighand->siglock); |
864 | sig = dequeue_signal(current, &s, &info); |
865 | current->blocked = current->real_blocked; |
866 | siginitset(¤t->real_blocked, 0); |
867 | recalc_sigpending(); |
868 | } |
869 | } |
870 | spin_unlock_irq(¤t->sighand->siglock); |
871 | |
872 | if (sig) { |
873 | ret = sig; |
874 | if (uinfo) { |
875 | if (copy_siginfo_to_user32(uinfo, &info)) |
876 | ret = -EFAULT; |
877 | } |
878 | }else { |
879 | ret = timeout?-EINTR:-EAGAIN; |
880 | } |
881 | return ret; |
882 | |
883 | } |
884 | |
885 | asmlinkage long |
886 | compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, |
887 | struct compat_siginfo __user *uinfo) |
888 | { |
889 | siginfo_t info; |
890 | |
891 | if (copy_siginfo_from_user32(&info, uinfo)) |
892 | return -EFAULT; |
893 | return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); |
894 | } |
895 | |
896 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
897 | |
898 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ |
899 | |
900 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) |
901 | { |
902 | compat_time_t i; |
903 | struct timeval tv; |
904 | |
905 | do_gettimeofday(&tv); |
906 | i = tv.tv_sec; |
907 | |
908 | if (tloc) { |
909 | if (put_user(i,tloc)) |
910 | return -EFAULT; |
911 | } |
912 | force_successful_syscall_return(); |
913 | return i; |
914 | } |
915 | |
916 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) |
917 | { |
918 | struct timespec tv; |
919 | int err; |
920 | |
921 | if (get_user(tv.tv_sec, tptr)) |
922 | return -EFAULT; |
923 | |
924 | tv.tv_nsec = 0; |
925 | |
926 | err = security_settime(&tv, NULL); |
927 | if (err) |
928 | return err; |
929 | |
930 | do_settimeofday(&tv); |
931 | return 0; |
932 | } |
933 | |
934 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
935 | |
936 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND |
937 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) |
938 | { |
939 | sigset_t newset; |
940 | compat_sigset_t newset32; |
941 | |
942 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
943 | if (sigsetsize != sizeof(sigset_t)) |
944 | return -EINVAL; |
945 | |
946 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) |
947 | return -EFAULT; |
948 | sigset_from_compat(&newset, &newset32); |
949 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
950 | |
951 | spin_lock_irq(¤t->sighand->siglock); |
952 | current->saved_sigmask = current->blocked; |
953 | current->blocked = newset; |
954 | recalc_sigpending(); |
955 | spin_unlock_irq(¤t->sighand->siglock); |
956 | |
957 | current->state = TASK_INTERRUPTIBLE; |
958 | schedule(); |
959 | set_restore_sigmask(); |
960 | return -ERESTARTNOHAND; |
961 | } |
962 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
963 | |
964 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
965 | { |
966 | struct timex txc; |
967 | int ret; |
968 | |
969 | memset(&txc, 0, sizeof(struct timex)); |
970 | |
971 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || |
972 | __get_user(txc.modes, &utp->modes) || |
973 | __get_user(txc.offset, &utp->offset) || |
974 | __get_user(txc.freq, &utp->freq) || |
975 | __get_user(txc.maxerror, &utp->maxerror) || |
976 | __get_user(txc.esterror, &utp->esterror) || |
977 | __get_user(txc.status, &utp->status) || |
978 | __get_user(txc.constant, &utp->constant) || |
979 | __get_user(txc.precision, &utp->precision) || |
980 | __get_user(txc.tolerance, &utp->tolerance) || |
981 | __get_user(txc.time.tv_sec, &utp->time.tv_sec) || |
982 | __get_user(txc.time.tv_usec, &utp->time.tv_usec) || |
983 | __get_user(txc.tick, &utp->tick) || |
984 | __get_user(txc.ppsfreq, &utp->ppsfreq) || |
985 | __get_user(txc.jitter, &utp->jitter) || |
986 | __get_user(txc.shift, &utp->shift) || |
987 | __get_user(txc.stabil, &utp->stabil) || |
988 | __get_user(txc.jitcnt, &utp->jitcnt) || |
989 | __get_user(txc.calcnt, &utp->calcnt) || |
990 | __get_user(txc.errcnt, &utp->errcnt) || |
991 | __get_user(txc.stbcnt, &utp->stbcnt)) |
992 | return -EFAULT; |
993 | |
994 | ret = do_adjtimex(&txc); |
995 | |
996 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || |
997 | __put_user(txc.modes, &utp->modes) || |
998 | __put_user(txc.offset, &utp->offset) || |
999 | __put_user(txc.freq, &utp->freq) || |
1000 | __put_user(txc.maxerror, &utp->maxerror) || |
1001 | __put_user(txc.esterror, &utp->esterror) || |
1002 | __put_user(txc.status, &utp->status) || |
1003 | __put_user(txc.constant, &utp->constant) || |
1004 | __put_user(txc.precision, &utp->precision) || |
1005 | __put_user(txc.tolerance, &utp->tolerance) || |
1006 | __put_user(txc.time.tv_sec, &utp->time.tv_sec) || |
1007 | __put_user(txc.time.tv_usec, &utp->time.tv_usec) || |
1008 | __put_user(txc.tick, &utp->tick) || |
1009 | __put_user(txc.ppsfreq, &utp->ppsfreq) || |
1010 | __put_user(txc.jitter, &utp->jitter) || |
1011 | __put_user(txc.shift, &utp->shift) || |
1012 | __put_user(txc.stabil, &utp->stabil) || |
1013 | __put_user(txc.jitcnt, &utp->jitcnt) || |
1014 | __put_user(txc.calcnt, &utp->calcnt) || |
1015 | __put_user(txc.errcnt, &utp->errcnt) || |
1016 | __put_user(txc.stbcnt, &utp->stbcnt) || |
1017 | __put_user(txc.tai, &utp->tai)) |
1018 | ret = -EFAULT; |
1019 | |
1020 | return ret; |
1021 | } |
1022 | |
1023 | #ifdef CONFIG_NUMA |
1024 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
1025 | compat_uptr_t __user *pages32, |
1026 | const int __user *nodes, |
1027 | int __user *status, |
1028 | int flags) |
1029 | { |
1030 | const void __user * __user *pages; |
1031 | int i; |
1032 | |
1033 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); |
1034 | for (i = 0; i < nr_pages; i++) { |
1035 | compat_uptr_t p; |
1036 | |
1037 | if (get_user(p, pages32 + i) || |
1038 | put_user(compat_ptr(p), pages + i)) |
1039 | return -EFAULT; |
1040 | } |
1041 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); |
1042 | } |
1043 | |
1044 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, |
1045 | compat_ulong_t maxnode, |
1046 | const compat_ulong_t __user *old_nodes, |
1047 | const compat_ulong_t __user *new_nodes) |
1048 | { |
1049 | unsigned long __user *old = NULL; |
1050 | unsigned long __user *new = NULL; |
1051 | nodemask_t tmp_mask; |
1052 | unsigned long nr_bits; |
1053 | unsigned long size; |
1054 | |
1055 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); |
1056 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; |
1057 | if (old_nodes) { |
1058 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) |
1059 | return -EFAULT; |
1060 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); |
1061 | if (new_nodes) |
1062 | new = old + size / sizeof(unsigned long); |
1063 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) |
1064 | return -EFAULT; |
1065 | } |
1066 | if (new_nodes) { |
1067 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) |
1068 | return -EFAULT; |
1069 | if (new == NULL) |
1070 | new = compat_alloc_user_space(size); |
1071 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) |
1072 | return -EFAULT; |
1073 | } |
1074 | return sys_migrate_pages(pid, nr_bits + 1, old, new); |
1075 | } |
1076 | #endif |
1077 | |
1078 | struct compat_sysinfo { |
1079 | s32 uptime; |
1080 | u32 loads[3]; |
1081 | u32 totalram; |
1082 | u32 freeram; |
1083 | u32 sharedram; |
1084 | u32 bufferram; |
1085 | u32 totalswap; |
1086 | u32 freeswap; |
1087 | u16 procs; |
1088 | u16 pad; |
1089 | u32 totalhigh; |
1090 | u32 freehigh; |
1091 | u32 mem_unit; |
1092 | char _f[20-2*sizeof(u32)-sizeof(int)]; |
1093 | }; |
1094 | |
1095 | asmlinkage long |
1096 | compat_sys_sysinfo(struct compat_sysinfo __user *info) |
1097 | { |
1098 | struct sysinfo s; |
1099 | |
1100 | do_sysinfo(&s); |
1101 | |
1102 | /* Check to see if any memory value is too large for 32-bit and scale |
1103 | * down if needed |
1104 | */ |
1105 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { |
1106 | int bitcount = 0; |
1107 | |
1108 | while (s.mem_unit < PAGE_SIZE) { |
1109 | s.mem_unit <<= 1; |
1110 | bitcount++; |
1111 | } |
1112 | |
1113 | s.totalram >>= bitcount; |
1114 | s.freeram >>= bitcount; |
1115 | s.sharedram >>= bitcount; |
1116 | s.bufferram >>= bitcount; |
1117 | s.totalswap >>= bitcount; |
1118 | s.freeswap >>= bitcount; |
1119 | s.totalhigh >>= bitcount; |
1120 | s.freehigh >>= bitcount; |
1121 | } |
1122 | |
1123 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || |
1124 | __put_user (s.uptime, &info->uptime) || |
1125 | __put_user (s.loads[0], &info->loads[0]) || |
1126 | __put_user (s.loads[1], &info->loads[1]) || |
1127 | __put_user (s.loads[2], &info->loads[2]) || |
1128 | __put_user (s.totalram, &info->totalram) || |
1129 | __put_user (s.freeram, &info->freeram) || |
1130 | __put_user (s.sharedram, &info->sharedram) || |
1131 | __put_user (s.bufferram, &info->bufferram) || |
1132 | __put_user (s.totalswap, &info->totalswap) || |
1133 | __put_user (s.freeswap, &info->freeswap) || |
1134 | __put_user (s.procs, &info->procs) || |
1135 | __put_user (s.totalhigh, &info->totalhigh) || |
1136 | __put_user (s.freehigh, &info->freehigh) || |
1137 | __put_user (s.mem_unit, &info->mem_unit)) |
1138 | return -EFAULT; |
1139 | |
1140 | return 0; |
1141 | } |
1142 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9