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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 | #include <linux/gfp.h> |
29 | |
30 | #include <asm/uaccess.h> |
31 | |
32 | /* |
33 | * Note that the native side is already converted to a timespec, because |
34 | * that's what we want anyway. |
35 | */ |
36 | static int compat_get_timeval(struct timespec *o, |
37 | struct compat_timeval __user *i) |
38 | { |
39 | long usec; |
40 | |
41 | if (get_user(o->tv_sec, &i->tv_sec) || |
42 | get_user(usec, &i->tv_usec)) |
43 | return -EFAULT; |
44 | o->tv_nsec = usec * 1000; |
45 | return 0; |
46 | } |
47 | |
48 | static int compat_put_timeval(struct compat_timeval __user *o, |
49 | struct timeval *i) |
50 | { |
51 | return (put_user(i->tv_sec, &o->tv_sec) || |
52 | put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; |
53 | } |
54 | |
55 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
56 | struct timezone __user *tz) |
57 | { |
58 | if (tv) { |
59 | struct timeval ktv; |
60 | do_gettimeofday(&ktv); |
61 | if (compat_put_timeval(tv, &ktv)) |
62 | return -EFAULT; |
63 | } |
64 | if (tz) { |
65 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
66 | return -EFAULT; |
67 | } |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, |
73 | struct timezone __user *tz) |
74 | { |
75 | struct timespec kts; |
76 | struct timezone ktz; |
77 | |
78 | if (tv) { |
79 | if (compat_get_timeval(&kts, tv)) |
80 | return -EFAULT; |
81 | } |
82 | if (tz) { |
83 | if (copy_from_user(&ktz, tz, sizeof(ktz))) |
84 | return -EFAULT; |
85 | } |
86 | |
87 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
88 | } |
89 | |
90 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
91 | { |
92 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || |
93 | __get_user(ts->tv_sec, &cts->tv_sec) || |
94 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
95 | } |
96 | |
97 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
98 | { |
99 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || |
100 | __put_user(ts->tv_sec, &cts->tv_sec) || |
101 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
102 | } |
103 | |
104 | static long compat_nanosleep_restart(struct restart_block *restart) |
105 | { |
106 | struct compat_timespec __user *rmtp; |
107 | struct timespec rmt; |
108 | mm_segment_t oldfs; |
109 | long ret; |
110 | |
111 | restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
112 | oldfs = get_fs(); |
113 | set_fs(KERNEL_DS); |
114 | ret = hrtimer_nanosleep_restart(restart); |
115 | set_fs(oldfs); |
116 | |
117 | if (ret) { |
118 | rmtp = restart->nanosleep.compat_rmtp; |
119 | |
120 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
121 | return -EFAULT; |
122 | } |
123 | |
124 | return ret; |
125 | } |
126 | |
127 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
128 | struct compat_timespec __user *rmtp) |
129 | { |
130 | struct timespec tu, rmt; |
131 | mm_segment_t oldfs; |
132 | long ret; |
133 | |
134 | if (get_compat_timespec(&tu, rqtp)) |
135 | return -EFAULT; |
136 | |
137 | if (!timespec_valid(&tu)) |
138 | return -EINVAL; |
139 | |
140 | oldfs = get_fs(); |
141 | set_fs(KERNEL_DS); |
142 | ret = hrtimer_nanosleep(&tu, |
143 | rmtp ? (struct timespec __user *)&rmt : NULL, |
144 | HRTIMER_MODE_REL, CLOCK_MONOTONIC); |
145 | set_fs(oldfs); |
146 | |
147 | if (ret) { |
148 | struct restart_block *restart |
149 | = ¤t_thread_info()->restart_block; |
150 | |
151 | restart->fn = compat_nanosleep_restart; |
152 | restart->nanosleep.compat_rmtp = rmtp; |
153 | |
154 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
155 | return -EFAULT; |
156 | } |
157 | |
158 | return ret; |
159 | } |
160 | |
161 | static inline long get_compat_itimerval(struct itimerval *o, |
162 | struct compat_itimerval __user *i) |
163 | { |
164 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || |
165 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | |
166 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | |
167 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | |
168 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); |
169 | } |
170 | |
171 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, |
172 | struct itimerval *i) |
173 | { |
174 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || |
175 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | |
176 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | |
177 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | |
178 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); |
179 | } |
180 | |
181 | asmlinkage long compat_sys_getitimer(int which, |
182 | struct compat_itimerval __user *it) |
183 | { |
184 | struct itimerval kit; |
185 | int error; |
186 | |
187 | error = do_getitimer(which, &kit); |
188 | if (!error && put_compat_itimerval(it, &kit)) |
189 | error = -EFAULT; |
190 | return error; |
191 | } |
192 | |
193 | asmlinkage long compat_sys_setitimer(int which, |
194 | struct compat_itimerval __user *in, |
195 | struct compat_itimerval __user *out) |
196 | { |
197 | struct itimerval kin, kout; |
198 | int error; |
199 | |
200 | if (in) { |
201 | if (get_compat_itimerval(&kin, in)) |
202 | return -EFAULT; |
203 | } else |
204 | memset(&kin, 0, sizeof(kin)); |
205 | |
206 | error = do_setitimer(which, &kin, out ? &kout : NULL); |
207 | if (error || !out) |
208 | return error; |
209 | if (put_compat_itimerval(out, &kout)) |
210 | return -EFAULT; |
211 | return 0; |
212 | } |
213 | |
214 | static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
215 | { |
216 | return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); |
217 | } |
218 | |
219 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
220 | { |
221 | if (tbuf) { |
222 | struct tms tms; |
223 | struct compat_tms tmp; |
224 | |
225 | do_sys_times(&tms); |
226 | /* Convert our struct tms to the compat version. */ |
227 | tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); |
228 | tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); |
229 | tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); |
230 | tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); |
231 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
232 | return -EFAULT; |
233 | } |
234 | force_successful_syscall_return(); |
235 | return compat_jiffies_to_clock_t(jiffies); |
236 | } |
237 | |
238 | /* |
239 | * Assumption: old_sigset_t and compat_old_sigset_t are both |
240 | * types that can be passed to put_user()/get_user(). |
241 | */ |
242 | |
243 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) |
244 | { |
245 | old_sigset_t s; |
246 | long ret; |
247 | mm_segment_t old_fs = get_fs(); |
248 | |
249 | set_fs(KERNEL_DS); |
250 | ret = sys_sigpending((old_sigset_t __user *) &s); |
251 | set_fs(old_fs); |
252 | if (ret == 0) |
253 | ret = put_user(s, set); |
254 | return ret; |
255 | } |
256 | |
257 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
258 | compat_old_sigset_t __user *oset) |
259 | { |
260 | old_sigset_t s; |
261 | long ret; |
262 | mm_segment_t old_fs; |
263 | |
264 | if (set && get_user(s, set)) |
265 | return -EFAULT; |
266 | old_fs = get_fs(); |
267 | set_fs(KERNEL_DS); |
268 | ret = sys_sigprocmask(how, |
269 | set ? (old_sigset_t __user *) &s : NULL, |
270 | oset ? (old_sigset_t __user *) &s : NULL); |
271 | set_fs(old_fs); |
272 | if (ret == 0) |
273 | if (oset) |
274 | ret = put_user(s, oset); |
275 | return ret; |
276 | } |
277 | |
278 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
279 | struct compat_rlimit __user *rlim) |
280 | { |
281 | struct rlimit r; |
282 | int ret; |
283 | mm_segment_t old_fs = get_fs (); |
284 | |
285 | if (resource >= RLIM_NLIMITS) |
286 | return -EINVAL; |
287 | |
288 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || |
289 | __get_user(r.rlim_cur, &rlim->rlim_cur) || |
290 | __get_user(r.rlim_max, &rlim->rlim_max)) |
291 | return -EFAULT; |
292 | |
293 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) |
294 | r.rlim_cur = RLIM_INFINITY; |
295 | if (r.rlim_max == COMPAT_RLIM_INFINITY) |
296 | r.rlim_max = RLIM_INFINITY; |
297 | set_fs(KERNEL_DS); |
298 | ret = sys_setrlimit(resource, (struct rlimit __user *) &r); |
299 | set_fs(old_fs); |
300 | return ret; |
301 | } |
302 | |
303 | #ifdef COMPAT_RLIM_OLD_INFINITY |
304 | |
305 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, |
306 | struct compat_rlimit __user *rlim) |
307 | { |
308 | struct rlimit r; |
309 | int ret; |
310 | mm_segment_t old_fs = get_fs(); |
311 | |
312 | set_fs(KERNEL_DS); |
313 | ret = sys_old_getrlimit(resource, &r); |
314 | set_fs(old_fs); |
315 | |
316 | if (!ret) { |
317 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) |
318 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
319 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) |
320 | r.rlim_max = COMPAT_RLIM_INFINITY; |
321 | |
322 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
323 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
324 | __put_user(r.rlim_max, &rlim->rlim_max)) |
325 | return -EFAULT; |
326 | } |
327 | return ret; |
328 | } |
329 | |
330 | #endif |
331 | |
332 | asmlinkage long compat_sys_getrlimit (unsigned int resource, |
333 | struct compat_rlimit __user *rlim) |
334 | { |
335 | struct rlimit r; |
336 | int ret; |
337 | mm_segment_t old_fs = get_fs(); |
338 | |
339 | set_fs(KERNEL_DS); |
340 | ret = sys_getrlimit(resource, (struct rlimit __user *) &r); |
341 | set_fs(old_fs); |
342 | if (!ret) { |
343 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) |
344 | r.rlim_cur = COMPAT_RLIM_INFINITY; |
345 | if (r.rlim_max > COMPAT_RLIM_INFINITY) |
346 | r.rlim_max = COMPAT_RLIM_INFINITY; |
347 | |
348 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
349 | __put_user(r.rlim_cur, &rlim->rlim_cur) || |
350 | __put_user(r.rlim_max, &rlim->rlim_max)) |
351 | return -EFAULT; |
352 | } |
353 | return ret; |
354 | } |
355 | |
356 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) |
357 | { |
358 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || |
359 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || |
360 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || |
361 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || |
362 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || |
363 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || |
364 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || |
365 | __put_user(r->ru_idrss, &ru->ru_idrss) || |
366 | __put_user(r->ru_isrss, &ru->ru_isrss) || |
367 | __put_user(r->ru_minflt, &ru->ru_minflt) || |
368 | __put_user(r->ru_majflt, &ru->ru_majflt) || |
369 | __put_user(r->ru_nswap, &ru->ru_nswap) || |
370 | __put_user(r->ru_inblock, &ru->ru_inblock) || |
371 | __put_user(r->ru_oublock, &ru->ru_oublock) || |
372 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || |
373 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || |
374 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || |
375 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || |
376 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) |
377 | return -EFAULT; |
378 | return 0; |
379 | } |
380 | |
381 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) |
382 | { |
383 | struct rusage r; |
384 | int ret; |
385 | mm_segment_t old_fs = get_fs(); |
386 | |
387 | set_fs(KERNEL_DS); |
388 | ret = sys_getrusage(who, (struct rusage __user *) &r); |
389 | set_fs(old_fs); |
390 | |
391 | if (ret) |
392 | return ret; |
393 | |
394 | if (put_compat_rusage(&r, ru)) |
395 | return -EFAULT; |
396 | |
397 | return 0; |
398 | } |
399 | |
400 | asmlinkage long |
401 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, |
402 | struct compat_rusage __user *ru) |
403 | { |
404 | if (!ru) { |
405 | return sys_wait4(pid, stat_addr, options, NULL); |
406 | } else { |
407 | struct rusage r; |
408 | int ret; |
409 | unsigned int status; |
410 | mm_segment_t old_fs = get_fs(); |
411 | |
412 | set_fs (KERNEL_DS); |
413 | ret = sys_wait4(pid, |
414 | (stat_addr ? |
415 | (unsigned int __user *) &status : NULL), |
416 | options, (struct rusage __user *) &r); |
417 | set_fs (old_fs); |
418 | |
419 | if (ret > 0) { |
420 | if (put_compat_rusage(&r, ru)) |
421 | return -EFAULT; |
422 | if (stat_addr && put_user(status, stat_addr)) |
423 | return -EFAULT; |
424 | } |
425 | return ret; |
426 | } |
427 | } |
428 | |
429 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, |
430 | struct compat_siginfo __user *uinfo, int options, |
431 | struct compat_rusage __user *uru) |
432 | { |
433 | siginfo_t info; |
434 | struct rusage ru; |
435 | long ret; |
436 | mm_segment_t old_fs = get_fs(); |
437 | |
438 | memset(&info, 0, sizeof(info)); |
439 | |
440 | set_fs(KERNEL_DS); |
441 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, |
442 | uru ? (struct rusage __user *)&ru : NULL); |
443 | set_fs(old_fs); |
444 | |
445 | if ((ret < 0) || (info.si_signo == 0)) |
446 | return ret; |
447 | |
448 | if (uru) { |
449 | ret = put_compat_rusage(&ru, uru); |
450 | if (ret) |
451 | return ret; |
452 | } |
453 | |
454 | BUG_ON(info.si_code & __SI_MASK); |
455 | info.si_code |= __SI_CHLD; |
456 | return copy_siginfo_to_user32(uinfo, &info); |
457 | } |
458 | |
459 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
460 | unsigned len, struct cpumask *new_mask) |
461 | { |
462 | unsigned long *k; |
463 | |
464 | if (len < cpumask_size()) |
465 | memset(new_mask, 0, cpumask_size()); |
466 | else if (len > cpumask_size()) |
467 | len = cpumask_size(); |
468 | |
469 | k = cpumask_bits(new_mask); |
470 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
471 | } |
472 | |
473 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, |
474 | unsigned int len, |
475 | compat_ulong_t __user *user_mask_ptr) |
476 | { |
477 | cpumask_var_t new_mask; |
478 | int retval; |
479 | |
480 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
481 | return -ENOMEM; |
482 | |
483 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); |
484 | if (retval) |
485 | goto out; |
486 | |
487 | retval = sched_setaffinity(pid, new_mask); |
488 | out: |
489 | free_cpumask_var(new_mask); |
490 | return retval; |
491 | } |
492 | |
493 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, |
494 | compat_ulong_t __user *user_mask_ptr) |
495 | { |
496 | int ret; |
497 | cpumask_var_t mask; |
498 | unsigned long *k; |
499 | unsigned int min_length = cpumask_size(); |
500 | |
501 | if (nr_cpu_ids <= BITS_PER_COMPAT_LONG) |
502 | min_length = sizeof(compat_ulong_t); |
503 | |
504 | if (len < min_length) |
505 | return -EINVAL; |
506 | |
507 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
508 | return -ENOMEM; |
509 | |
510 | ret = sched_getaffinity(pid, mask); |
511 | if (ret < 0) |
512 | goto out; |
513 | |
514 | k = cpumask_bits(mask); |
515 | ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8); |
516 | if (ret == 0) |
517 | ret = min_length; |
518 | |
519 | out: |
520 | free_cpumask_var(mask); |
521 | return ret; |
522 | } |
523 | |
524 | int get_compat_itimerspec(struct itimerspec *dst, |
525 | const struct compat_itimerspec __user *src) |
526 | { |
527 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
528 | get_compat_timespec(&dst->it_value, &src->it_value)) |
529 | return -EFAULT; |
530 | return 0; |
531 | } |
532 | |
533 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
534 | const struct itimerspec *src) |
535 | { |
536 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
537 | put_compat_timespec(&src->it_value, &dst->it_value)) |
538 | return -EFAULT; |
539 | return 0; |
540 | } |
541 | |
542 | long compat_sys_timer_create(clockid_t which_clock, |
543 | struct compat_sigevent __user *timer_event_spec, |
544 | timer_t __user *created_timer_id) |
545 | { |
546 | struct sigevent __user *event = NULL; |
547 | |
548 | if (timer_event_spec) { |
549 | struct sigevent kevent; |
550 | |
551 | event = compat_alloc_user_space(sizeof(*event)); |
552 | if (get_compat_sigevent(&kevent, timer_event_spec) || |
553 | copy_to_user(event, &kevent, sizeof(*event))) |
554 | return -EFAULT; |
555 | } |
556 | |
557 | return sys_timer_create(which_clock, event, created_timer_id); |
558 | } |
559 | |
560 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
561 | struct compat_itimerspec __user *new, |
562 | struct compat_itimerspec __user *old) |
563 | { |
564 | long err; |
565 | mm_segment_t oldfs; |
566 | struct itimerspec newts, oldts; |
567 | |
568 | if (!new) |
569 | return -EINVAL; |
570 | if (get_compat_itimerspec(&newts, new)) |
571 | return -EFAULT; |
572 | oldfs = get_fs(); |
573 | set_fs(KERNEL_DS); |
574 | err = sys_timer_settime(timer_id, flags, |
575 | (struct itimerspec __user *) &newts, |
576 | (struct itimerspec __user *) &oldts); |
577 | set_fs(oldfs); |
578 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
579 | return -EFAULT; |
580 | return err; |
581 | } |
582 | |
583 | long compat_sys_timer_gettime(timer_t timer_id, |
584 | struct compat_itimerspec __user *setting) |
585 | { |
586 | long err; |
587 | mm_segment_t oldfs; |
588 | struct itimerspec ts; |
589 | |
590 | oldfs = get_fs(); |
591 | set_fs(KERNEL_DS); |
592 | err = sys_timer_gettime(timer_id, |
593 | (struct itimerspec __user *) &ts); |
594 | set_fs(oldfs); |
595 | if (!err && put_compat_itimerspec(setting, &ts)) |
596 | return -EFAULT; |
597 | return err; |
598 | } |
599 | |
600 | long compat_sys_clock_settime(clockid_t which_clock, |
601 | struct compat_timespec __user *tp) |
602 | { |
603 | long err; |
604 | mm_segment_t oldfs; |
605 | struct timespec ts; |
606 | |
607 | if (get_compat_timespec(&ts, tp)) |
608 | return -EFAULT; |
609 | oldfs = get_fs(); |
610 | set_fs(KERNEL_DS); |
611 | err = sys_clock_settime(which_clock, |
612 | (struct timespec __user *) &ts); |
613 | set_fs(oldfs); |
614 | return err; |
615 | } |
616 | |
617 | long compat_sys_clock_gettime(clockid_t which_clock, |
618 | struct compat_timespec __user *tp) |
619 | { |
620 | long err; |
621 | mm_segment_t oldfs; |
622 | struct timespec ts; |
623 | |
624 | oldfs = get_fs(); |
625 | set_fs(KERNEL_DS); |
626 | err = sys_clock_gettime(which_clock, |
627 | (struct timespec __user *) &ts); |
628 | set_fs(oldfs); |
629 | if (!err && put_compat_timespec(&ts, tp)) |
630 | return -EFAULT; |
631 | return err; |
632 | } |
633 | |
634 | long compat_sys_clock_getres(clockid_t which_clock, |
635 | struct compat_timespec __user *tp) |
636 | { |
637 | long err; |
638 | mm_segment_t oldfs; |
639 | struct timespec ts; |
640 | |
641 | oldfs = get_fs(); |
642 | set_fs(KERNEL_DS); |
643 | err = sys_clock_getres(which_clock, |
644 | (struct timespec __user *) &ts); |
645 | set_fs(oldfs); |
646 | if (!err && tp && put_compat_timespec(&ts, tp)) |
647 | return -EFAULT; |
648 | return err; |
649 | } |
650 | |
651 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
652 | { |
653 | long err; |
654 | mm_segment_t oldfs; |
655 | struct timespec tu; |
656 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
657 | |
658 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
659 | oldfs = get_fs(); |
660 | set_fs(KERNEL_DS); |
661 | err = clock_nanosleep_restart(restart); |
662 | set_fs(oldfs); |
663 | |
664 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
665 | put_compat_timespec(&tu, rmtp)) |
666 | return -EFAULT; |
667 | |
668 | if (err == -ERESTART_RESTARTBLOCK) { |
669 | restart->fn = compat_clock_nanosleep_restart; |
670 | restart->nanosleep.compat_rmtp = rmtp; |
671 | } |
672 | return err; |
673 | } |
674 | |
675 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
676 | struct compat_timespec __user *rqtp, |
677 | struct compat_timespec __user *rmtp) |
678 | { |
679 | long err; |
680 | mm_segment_t oldfs; |
681 | struct timespec in, out; |
682 | struct restart_block *restart; |
683 | |
684 | if (get_compat_timespec(&in, rqtp)) |
685 | return -EFAULT; |
686 | |
687 | oldfs = get_fs(); |
688 | set_fs(KERNEL_DS); |
689 | err = sys_clock_nanosleep(which_clock, flags, |
690 | (struct timespec __user *) &in, |
691 | (struct timespec __user *) &out); |
692 | set_fs(oldfs); |
693 | |
694 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
695 | put_compat_timespec(&out, rmtp)) |
696 | return -EFAULT; |
697 | |
698 | if (err == -ERESTART_RESTARTBLOCK) { |
699 | restart = ¤t_thread_info()->restart_block; |
700 | restart->fn = compat_clock_nanosleep_restart; |
701 | restart->nanosleep.compat_rmtp = rmtp; |
702 | } |
703 | return err; |
704 | } |
705 | |
706 | /* |
707 | * We currently only need the following fields from the sigevent |
708 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes |
709 | * sigev_notify_thread_id). The others are handled in user mode. |
710 | * We also assume that copying sigev_value.sival_int is sufficient |
711 | * to keep all the bits of sigev_value.sival_ptr intact. |
712 | */ |
713 | int get_compat_sigevent(struct sigevent *event, |
714 | const struct compat_sigevent __user *u_event) |
715 | { |
716 | memset(event, 0, sizeof(*event)); |
717 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
718 | __get_user(event->sigev_value.sival_int, |
719 | &u_event->sigev_value.sival_int) || |
720 | __get_user(event->sigev_signo, &u_event->sigev_signo) || |
721 | __get_user(event->sigev_notify, &u_event->sigev_notify) || |
722 | __get_user(event->sigev_notify_thread_id, |
723 | &u_event->sigev_notify_thread_id)) |
724 | ? -EFAULT : 0; |
725 | } |
726 | |
727 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
728 | unsigned long bitmap_size) |
729 | { |
730 | int i, j; |
731 | unsigned long m; |
732 | compat_ulong_t um; |
733 | unsigned long nr_compat_longs; |
734 | |
735 | /* align bitmap up to nearest compat_long_t boundary */ |
736 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
737 | |
738 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) |
739 | return -EFAULT; |
740 | |
741 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
742 | |
743 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
744 | m = 0; |
745 | |
746 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
747 | /* |
748 | * We dont want to read past the end of the userspace |
749 | * bitmap. We must however ensure the end of the |
750 | * kernel bitmap is zeroed. |
751 | */ |
752 | if (nr_compat_longs-- > 0) { |
753 | if (__get_user(um, umask)) |
754 | return -EFAULT; |
755 | } else { |
756 | um = 0; |
757 | } |
758 | |
759 | umask++; |
760 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); |
761 | } |
762 | *mask++ = m; |
763 | } |
764 | |
765 | return 0; |
766 | } |
767 | |
768 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, |
769 | unsigned long bitmap_size) |
770 | { |
771 | int i, j; |
772 | unsigned long m; |
773 | compat_ulong_t um; |
774 | unsigned long nr_compat_longs; |
775 | |
776 | /* align bitmap up to nearest compat_long_t boundary */ |
777 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
778 | |
779 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) |
780 | return -EFAULT; |
781 | |
782 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
783 | |
784 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
785 | m = *mask++; |
786 | |
787 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
788 | um = m; |
789 | |
790 | /* |
791 | * We dont want to write past the end of the userspace |
792 | * bitmap. |
793 | */ |
794 | if (nr_compat_longs-- > 0) { |
795 | if (__put_user(um, umask)) |
796 | return -EFAULT; |
797 | } |
798 | |
799 | umask++; |
800 | m >>= 4*sizeof(um); |
801 | m >>= 4*sizeof(um); |
802 | } |
803 | } |
804 | |
805 | return 0; |
806 | } |
807 | |
808 | void |
809 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) |
810 | { |
811 | switch (_NSIG_WORDS) { |
812 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
813 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); |
814 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); |
815 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
816 | } |
817 | } |
818 | |
819 | asmlinkage long |
820 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, |
821 | struct compat_siginfo __user *uinfo, |
822 | struct compat_timespec __user *uts, compat_size_t sigsetsize) |
823 | { |
824 | compat_sigset_t s32; |
825 | sigset_t s; |
826 | int sig; |
827 | struct timespec t; |
828 | siginfo_t info; |
829 | long ret, timeout = 0; |
830 | |
831 | if (sigsetsize != sizeof(sigset_t)) |
832 | return -EINVAL; |
833 | |
834 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) |
835 | return -EFAULT; |
836 | sigset_from_compat(&s, &s32); |
837 | sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); |
838 | signotset(&s); |
839 | |
840 | if (uts) { |
841 | if (get_compat_timespec (&t, uts)) |
842 | return -EFAULT; |
843 | if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 |
844 | || t.tv_sec < 0) |
845 | return -EINVAL; |
846 | } |
847 | |
848 | spin_lock_irq(¤t->sighand->siglock); |
849 | sig = dequeue_signal(current, &s, &info); |
850 | if (!sig) { |
851 | timeout = MAX_SCHEDULE_TIMEOUT; |
852 | if (uts) |
853 | timeout = timespec_to_jiffies(&t) |
854 | +(t.tv_sec || t.tv_nsec); |
855 | if (timeout) { |
856 | current->real_blocked = current->blocked; |
857 | sigandsets(¤t->blocked, ¤t->blocked, &s); |
858 | |
859 | recalc_sigpending(); |
860 | spin_unlock_irq(¤t->sighand->siglock); |
861 | |
862 | timeout = schedule_timeout_interruptible(timeout); |
863 | |
864 | spin_lock_irq(¤t->sighand->siglock); |
865 | sig = dequeue_signal(current, &s, &info); |
866 | current->blocked = current->real_blocked; |
867 | siginitset(¤t->real_blocked, 0); |
868 | recalc_sigpending(); |
869 | } |
870 | } |
871 | spin_unlock_irq(¤t->sighand->siglock); |
872 | |
873 | if (sig) { |
874 | ret = sig; |
875 | if (uinfo) { |
876 | if (copy_siginfo_to_user32(uinfo, &info)) |
877 | ret = -EFAULT; |
878 | } |
879 | }else { |
880 | ret = timeout?-EINTR:-EAGAIN; |
881 | } |
882 | return ret; |
883 | |
884 | } |
885 | |
886 | asmlinkage long |
887 | compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, |
888 | struct compat_siginfo __user *uinfo) |
889 | { |
890 | siginfo_t info; |
891 | |
892 | if (copy_siginfo_from_user32(&info, uinfo)) |
893 | return -EFAULT; |
894 | return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); |
895 | } |
896 | |
897 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
898 | |
899 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ |
900 | |
901 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) |
902 | { |
903 | compat_time_t i; |
904 | struct timeval tv; |
905 | |
906 | do_gettimeofday(&tv); |
907 | i = tv.tv_sec; |
908 | |
909 | if (tloc) { |
910 | if (put_user(i,tloc)) |
911 | return -EFAULT; |
912 | } |
913 | force_successful_syscall_return(); |
914 | return i; |
915 | } |
916 | |
917 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) |
918 | { |
919 | struct timespec tv; |
920 | int err; |
921 | |
922 | if (get_user(tv.tv_sec, tptr)) |
923 | return -EFAULT; |
924 | |
925 | tv.tv_nsec = 0; |
926 | |
927 | err = security_settime(&tv, NULL); |
928 | if (err) |
929 | return err; |
930 | |
931 | do_settimeofday(&tv); |
932 | return 0; |
933 | } |
934 | |
935 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
936 | |
937 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND |
938 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) |
939 | { |
940 | sigset_t newset; |
941 | compat_sigset_t newset32; |
942 | |
943 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
944 | if (sigsetsize != sizeof(sigset_t)) |
945 | return -EINVAL; |
946 | |
947 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) |
948 | return -EFAULT; |
949 | sigset_from_compat(&newset, &newset32); |
950 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
951 | |
952 | spin_lock_irq(¤t->sighand->siglock); |
953 | current->saved_sigmask = current->blocked; |
954 | current->blocked = newset; |
955 | recalc_sigpending(); |
956 | spin_unlock_irq(¤t->sighand->siglock); |
957 | |
958 | current->state = TASK_INTERRUPTIBLE; |
959 | schedule(); |
960 | set_restore_sigmask(); |
961 | return -ERESTARTNOHAND; |
962 | } |
963 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
964 | |
965 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
966 | { |
967 | struct timex txc; |
968 | int ret; |
969 | |
970 | memset(&txc, 0, sizeof(struct timex)); |
971 | |
972 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || |
973 | __get_user(txc.modes, &utp->modes) || |
974 | __get_user(txc.offset, &utp->offset) || |
975 | __get_user(txc.freq, &utp->freq) || |
976 | __get_user(txc.maxerror, &utp->maxerror) || |
977 | __get_user(txc.esterror, &utp->esterror) || |
978 | __get_user(txc.status, &utp->status) || |
979 | __get_user(txc.constant, &utp->constant) || |
980 | __get_user(txc.precision, &utp->precision) || |
981 | __get_user(txc.tolerance, &utp->tolerance) || |
982 | __get_user(txc.time.tv_sec, &utp->time.tv_sec) || |
983 | __get_user(txc.time.tv_usec, &utp->time.tv_usec) || |
984 | __get_user(txc.tick, &utp->tick) || |
985 | __get_user(txc.ppsfreq, &utp->ppsfreq) || |
986 | __get_user(txc.jitter, &utp->jitter) || |
987 | __get_user(txc.shift, &utp->shift) || |
988 | __get_user(txc.stabil, &utp->stabil) || |
989 | __get_user(txc.jitcnt, &utp->jitcnt) || |
990 | __get_user(txc.calcnt, &utp->calcnt) || |
991 | __get_user(txc.errcnt, &utp->errcnt) || |
992 | __get_user(txc.stbcnt, &utp->stbcnt)) |
993 | return -EFAULT; |
994 | |
995 | ret = do_adjtimex(&txc); |
996 | |
997 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || |
998 | __put_user(txc.modes, &utp->modes) || |
999 | __put_user(txc.offset, &utp->offset) || |
1000 | __put_user(txc.freq, &utp->freq) || |
1001 | __put_user(txc.maxerror, &utp->maxerror) || |
1002 | __put_user(txc.esterror, &utp->esterror) || |
1003 | __put_user(txc.status, &utp->status) || |
1004 | __put_user(txc.constant, &utp->constant) || |
1005 | __put_user(txc.precision, &utp->precision) || |
1006 | __put_user(txc.tolerance, &utp->tolerance) || |
1007 | __put_user(txc.time.tv_sec, &utp->time.tv_sec) || |
1008 | __put_user(txc.time.tv_usec, &utp->time.tv_usec) || |
1009 | __put_user(txc.tick, &utp->tick) || |
1010 | __put_user(txc.ppsfreq, &utp->ppsfreq) || |
1011 | __put_user(txc.jitter, &utp->jitter) || |
1012 | __put_user(txc.shift, &utp->shift) || |
1013 | __put_user(txc.stabil, &utp->stabil) || |
1014 | __put_user(txc.jitcnt, &utp->jitcnt) || |
1015 | __put_user(txc.calcnt, &utp->calcnt) || |
1016 | __put_user(txc.errcnt, &utp->errcnt) || |
1017 | __put_user(txc.stbcnt, &utp->stbcnt) || |
1018 | __put_user(txc.tai, &utp->tai)) |
1019 | ret = -EFAULT; |
1020 | |
1021 | return ret; |
1022 | } |
1023 | |
1024 | #ifdef CONFIG_NUMA |
1025 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
1026 | compat_uptr_t __user *pages32, |
1027 | const int __user *nodes, |
1028 | int __user *status, |
1029 | int flags) |
1030 | { |
1031 | const void __user * __user *pages; |
1032 | int i; |
1033 | |
1034 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); |
1035 | for (i = 0; i < nr_pages; i++) { |
1036 | compat_uptr_t p; |
1037 | |
1038 | if (get_user(p, pages32 + i) || |
1039 | put_user(compat_ptr(p), pages + i)) |
1040 | return -EFAULT; |
1041 | } |
1042 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); |
1043 | } |
1044 | |
1045 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, |
1046 | compat_ulong_t maxnode, |
1047 | const compat_ulong_t __user *old_nodes, |
1048 | const compat_ulong_t __user *new_nodes) |
1049 | { |
1050 | unsigned long __user *old = NULL; |
1051 | unsigned long __user *new = NULL; |
1052 | nodemask_t tmp_mask; |
1053 | unsigned long nr_bits; |
1054 | unsigned long size; |
1055 | |
1056 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); |
1057 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; |
1058 | if (old_nodes) { |
1059 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) |
1060 | return -EFAULT; |
1061 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); |
1062 | if (new_nodes) |
1063 | new = old + size / sizeof(unsigned long); |
1064 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) |
1065 | return -EFAULT; |
1066 | } |
1067 | if (new_nodes) { |
1068 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) |
1069 | return -EFAULT; |
1070 | if (new == NULL) |
1071 | new = compat_alloc_user_space(size); |
1072 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) |
1073 | return -EFAULT; |
1074 | } |
1075 | return sys_migrate_pages(pid, nr_bits + 1, old, new); |
1076 | } |
1077 | #endif |
1078 | |
1079 | struct compat_sysinfo { |
1080 | s32 uptime; |
1081 | u32 loads[3]; |
1082 | u32 totalram; |
1083 | u32 freeram; |
1084 | u32 sharedram; |
1085 | u32 bufferram; |
1086 | u32 totalswap; |
1087 | u32 freeswap; |
1088 | u16 procs; |
1089 | u16 pad; |
1090 | u32 totalhigh; |
1091 | u32 freehigh; |
1092 | u32 mem_unit; |
1093 | char _f[20-2*sizeof(u32)-sizeof(int)]; |
1094 | }; |
1095 | |
1096 | asmlinkage long |
1097 | compat_sys_sysinfo(struct compat_sysinfo __user *info) |
1098 | { |
1099 | struct sysinfo s; |
1100 | |
1101 | do_sysinfo(&s); |
1102 | |
1103 | /* Check to see if any memory value is too large for 32-bit and scale |
1104 | * down if needed |
1105 | */ |
1106 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { |
1107 | int bitcount = 0; |
1108 | |
1109 | while (s.mem_unit < PAGE_SIZE) { |
1110 | s.mem_unit <<= 1; |
1111 | bitcount++; |
1112 | } |
1113 | |
1114 | s.totalram >>= bitcount; |
1115 | s.freeram >>= bitcount; |
1116 | s.sharedram >>= bitcount; |
1117 | s.bufferram >>= bitcount; |
1118 | s.totalswap >>= bitcount; |
1119 | s.freeswap >>= bitcount; |
1120 | s.totalhigh >>= bitcount; |
1121 | s.freehigh >>= bitcount; |
1122 | } |
1123 | |
1124 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || |
1125 | __put_user (s.uptime, &info->uptime) || |
1126 | __put_user (s.loads[0], &info->loads[0]) || |
1127 | __put_user (s.loads[1], &info->loads[1]) || |
1128 | __put_user (s.loads[2], &info->loads[2]) || |
1129 | __put_user (s.totalram, &info->totalram) || |
1130 | __put_user (s.freeram, &info->freeram) || |
1131 | __put_user (s.sharedram, &info->sharedram) || |
1132 | __put_user (s.bufferram, &info->bufferram) || |
1133 | __put_user (s.totalswap, &info->totalswap) || |
1134 | __put_user (s.freeswap, &info->freeswap) || |
1135 | __put_user (s.procs, &info->procs) || |
1136 | __put_user (s.totalhigh, &info->totalhigh) || |
1137 | __put_user (s.freehigh, &info->freehigh) || |
1138 | __put_user (s.mem_unit, &info->mem_unit)) |
1139 | return -EFAULT; |
1140 | |
1141 | return 0; |
1142 | } |
1143 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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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