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1da177e4 LT |
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 */ | |
1da177e4 LT |
20 | #include <linux/syscalls.h> |
21 | #include <linux/unistd.h> | |
22 | #include <linux/security.h> | |
3158e941 | 23 | #include <linux/timex.h> |
1b2db9fb | 24 | #include <linux/migrate.h> |
1711ef38 | 25 | #include <linux/posix-timers.h> |
1da177e4 LT |
26 | |
27 | #include <asm/uaccess.h> | |
1da177e4 | 28 | |
07f3f05c DH |
29 | extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); |
30 | ||
1da177e4 LT |
31 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
32 | { | |
33 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || | |
34 | __get_user(ts->tv_sec, &cts->tv_sec) || | |
35 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
36 | } | |
37 | ||
38 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) | |
39 | { | |
40 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || | |
41 | __put_user(ts->tv_sec, &cts->tv_sec) || | |
42 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
43 | } | |
44 | ||
45 | static long compat_nanosleep_restart(struct restart_block *restart) | |
46 | { | |
47 | unsigned long expire = restart->arg0, now = jiffies; | |
48 | struct compat_timespec __user *rmtp; | |
49 | ||
50 | /* Did it expire while we handled signals? */ | |
51 | if (!time_after(expire, now)) | |
52 | return 0; | |
53 | ||
75bcc8c5 | 54 | expire = schedule_timeout_interruptible(expire - now); |
1da177e4 LT |
55 | if (expire == 0) |
56 | return 0; | |
57 | ||
58 | rmtp = (struct compat_timespec __user *)restart->arg1; | |
59 | if (rmtp) { | |
60 | struct compat_timespec ct; | |
61 | struct timespec t; | |
62 | ||
63 | jiffies_to_timespec(expire, &t); | |
64 | ct.tv_sec = t.tv_sec; | |
65 | ct.tv_nsec = t.tv_nsec; | |
66 | if (copy_to_user(rmtp, &ct, sizeof(ct))) | |
67 | return -EFAULT; | |
68 | } | |
69 | /* The 'restart' block is already filled in */ | |
70 | return -ERESTART_RESTARTBLOCK; | |
71 | } | |
72 | ||
73 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, | |
74 | struct compat_timespec __user *rmtp) | |
75 | { | |
76 | struct timespec t; | |
77 | struct restart_block *restart; | |
78 | unsigned long expire; | |
79 | ||
80 | if (get_compat_timespec(&t, rqtp)) | |
81 | return -EFAULT; | |
82 | ||
83 | if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0)) | |
84 | return -EINVAL; | |
85 | ||
86 | expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec); | |
75bcc8c5 | 87 | expire = schedule_timeout_interruptible(expire); |
1da177e4 LT |
88 | if (expire == 0) |
89 | return 0; | |
90 | ||
91 | if (rmtp) { | |
92 | jiffies_to_timespec(expire, &t); | |
93 | if (put_compat_timespec(&t, rmtp)) | |
94 | return -EFAULT; | |
95 | } | |
96 | restart = ¤t_thread_info()->restart_block; | |
97 | restart->fn = compat_nanosleep_restart; | |
98 | restart->arg0 = jiffies + expire; | |
99 | restart->arg1 = (unsigned long) rmtp; | |
100 | return -ERESTART_RESTARTBLOCK; | |
101 | } | |
102 | ||
103 | static inline long get_compat_itimerval(struct itimerval *o, | |
104 | struct compat_itimerval __user *i) | |
105 | { | |
106 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
107 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | | |
108 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | | |
109 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | | |
110 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); | |
111 | } | |
112 | ||
113 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, | |
114 | struct itimerval *i) | |
115 | { | |
116 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
117 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | | |
118 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | | |
119 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | | |
120 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); | |
121 | } | |
122 | ||
123 | asmlinkage long compat_sys_getitimer(int which, | |
124 | struct compat_itimerval __user *it) | |
125 | { | |
126 | struct itimerval kit; | |
127 | int error; | |
128 | ||
129 | error = do_getitimer(which, &kit); | |
130 | if (!error && put_compat_itimerval(it, &kit)) | |
131 | error = -EFAULT; | |
132 | return error; | |
133 | } | |
134 | ||
135 | asmlinkage long compat_sys_setitimer(int which, | |
136 | struct compat_itimerval __user *in, | |
137 | struct compat_itimerval __user *out) | |
138 | { | |
139 | struct itimerval kin, kout; | |
140 | int error; | |
141 | ||
142 | if (in) { | |
143 | if (get_compat_itimerval(&kin, in)) | |
144 | return -EFAULT; | |
145 | } else | |
146 | memset(&kin, 0, sizeof(kin)); | |
147 | ||
148 | error = do_setitimer(which, &kin, out ? &kout : NULL); | |
149 | if (error || !out) | |
150 | return error; | |
151 | if (put_compat_itimerval(out, &kout)) | |
152 | return -EFAULT; | |
153 | return 0; | |
154 | } | |
155 | ||
156 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) | |
157 | { | |
158 | /* | |
159 | * In the SMP world we might just be unlucky and have one of | |
160 | * the times increment as we use it. Since the value is an | |
161 | * atomically safe type this is just fine. Conceptually its | |
162 | * as if the syscall took an instant longer to occur. | |
163 | */ | |
164 | if (tbuf) { | |
165 | struct compat_tms tmp; | |
166 | struct task_struct *tsk = current; | |
167 | struct task_struct *t; | |
168 | cputime_t utime, stime, cutime, cstime; | |
169 | ||
170 | read_lock(&tasklist_lock); | |
171 | utime = tsk->signal->utime; | |
172 | stime = tsk->signal->stime; | |
173 | t = tsk; | |
174 | do { | |
175 | utime = cputime_add(utime, t->utime); | |
176 | stime = cputime_add(stime, t->stime); | |
177 | t = next_thread(t); | |
178 | } while (t != tsk); | |
179 | ||
180 | /* | |
181 | * While we have tasklist_lock read-locked, no dying thread | |
182 | * can be updating current->signal->[us]time. Instead, | |
183 | * we got their counts included in the live thread loop. | |
184 | * However, another thread can come in right now and | |
185 | * do a wait call that updates current->signal->c[us]time. | |
186 | * To make sure we always see that pair updated atomically, | |
187 | * we take the siglock around fetching them. | |
188 | */ | |
189 | spin_lock_irq(&tsk->sighand->siglock); | |
190 | cutime = tsk->signal->cutime; | |
191 | cstime = tsk->signal->cstime; | |
192 | spin_unlock_irq(&tsk->sighand->siglock); | |
193 | read_unlock(&tasklist_lock); | |
194 | ||
195 | tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime)); | |
196 | tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime)); | |
197 | tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime)); | |
198 | tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime)); | |
199 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) | |
200 | return -EFAULT; | |
201 | } | |
202 | return compat_jiffies_to_clock_t(jiffies); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Assumption: old_sigset_t and compat_old_sigset_t are both | |
207 | * types that can be passed to put_user()/get_user(). | |
208 | */ | |
209 | ||
210 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) | |
211 | { | |
212 | old_sigset_t s; | |
213 | long ret; | |
214 | mm_segment_t old_fs = get_fs(); | |
215 | ||
216 | set_fs(KERNEL_DS); | |
217 | ret = sys_sigpending((old_sigset_t __user *) &s); | |
218 | set_fs(old_fs); | |
219 | if (ret == 0) | |
220 | ret = put_user(s, set); | |
221 | return ret; | |
222 | } | |
223 | ||
224 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, | |
225 | compat_old_sigset_t __user *oset) | |
226 | { | |
227 | old_sigset_t s; | |
228 | long ret; | |
229 | mm_segment_t old_fs; | |
230 | ||
231 | if (set && get_user(s, set)) | |
232 | return -EFAULT; | |
233 | old_fs = get_fs(); | |
234 | set_fs(KERNEL_DS); | |
235 | ret = sys_sigprocmask(how, | |
236 | set ? (old_sigset_t __user *) &s : NULL, | |
237 | oset ? (old_sigset_t __user *) &s : NULL); | |
238 | set_fs(old_fs); | |
239 | if (ret == 0) | |
240 | if (oset) | |
241 | ret = put_user(s, oset); | |
242 | return ret; | |
243 | } | |
244 | ||
1da177e4 LT |
245 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
246 | struct compat_rlimit __user *rlim) | |
247 | { | |
248 | struct rlimit r; | |
249 | int ret; | |
250 | mm_segment_t old_fs = get_fs (); | |
251 | ||
252 | if (resource >= RLIM_NLIMITS) | |
253 | return -EINVAL; | |
254 | ||
255 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || | |
256 | __get_user(r.rlim_cur, &rlim->rlim_cur) || | |
257 | __get_user(r.rlim_max, &rlim->rlim_max)) | |
258 | return -EFAULT; | |
259 | ||
260 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) | |
261 | r.rlim_cur = RLIM_INFINITY; | |
262 | if (r.rlim_max == COMPAT_RLIM_INFINITY) | |
263 | r.rlim_max = RLIM_INFINITY; | |
264 | set_fs(KERNEL_DS); | |
265 | ret = sys_setrlimit(resource, (struct rlimit __user *) &r); | |
266 | set_fs(old_fs); | |
267 | return ret; | |
268 | } | |
269 | ||
270 | #ifdef COMPAT_RLIM_OLD_INFINITY | |
271 | ||
272 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, | |
273 | struct compat_rlimit __user *rlim) | |
274 | { | |
275 | struct rlimit r; | |
276 | int ret; | |
277 | mm_segment_t old_fs = get_fs(); | |
278 | ||
279 | set_fs(KERNEL_DS); | |
280 | ret = sys_old_getrlimit(resource, &r); | |
281 | set_fs(old_fs); | |
282 | ||
283 | if (!ret) { | |
284 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) | |
285 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
286 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) | |
287 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
288 | ||
289 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
290 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
291 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
292 | return -EFAULT; | |
293 | } | |
294 | return ret; | |
295 | } | |
296 | ||
297 | #endif | |
298 | ||
299 | asmlinkage long compat_sys_getrlimit (unsigned int resource, | |
300 | struct compat_rlimit __user *rlim) | |
301 | { | |
302 | struct rlimit r; | |
303 | int ret; | |
304 | mm_segment_t old_fs = get_fs(); | |
305 | ||
306 | set_fs(KERNEL_DS); | |
307 | ret = sys_getrlimit(resource, (struct rlimit __user *) &r); | |
308 | set_fs(old_fs); | |
309 | if (!ret) { | |
310 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) | |
311 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
312 | if (r.rlim_max > COMPAT_RLIM_INFINITY) | |
313 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
314 | ||
315 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
316 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
317 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
318 | return -EFAULT; | |
319 | } | |
320 | return ret; | |
321 | } | |
322 | ||
323 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) | |
324 | { | |
325 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || | |
326 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || | |
327 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || | |
328 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || | |
329 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || | |
330 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || | |
331 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || | |
332 | __put_user(r->ru_idrss, &ru->ru_idrss) || | |
333 | __put_user(r->ru_isrss, &ru->ru_isrss) || | |
334 | __put_user(r->ru_minflt, &ru->ru_minflt) || | |
335 | __put_user(r->ru_majflt, &ru->ru_majflt) || | |
336 | __put_user(r->ru_nswap, &ru->ru_nswap) || | |
337 | __put_user(r->ru_inblock, &ru->ru_inblock) || | |
338 | __put_user(r->ru_oublock, &ru->ru_oublock) || | |
339 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || | |
340 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || | |
341 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || | |
342 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || | |
343 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) | |
344 | return -EFAULT; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) | |
349 | { | |
350 | struct rusage r; | |
351 | int ret; | |
352 | mm_segment_t old_fs = get_fs(); | |
353 | ||
354 | set_fs(KERNEL_DS); | |
355 | ret = sys_getrusage(who, (struct rusage __user *) &r); | |
356 | set_fs(old_fs); | |
357 | ||
358 | if (ret) | |
359 | return ret; | |
360 | ||
361 | if (put_compat_rusage(&r, ru)) | |
362 | return -EFAULT; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | asmlinkage long | |
368 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, | |
369 | struct compat_rusage __user *ru) | |
370 | { | |
371 | if (!ru) { | |
372 | return sys_wait4(pid, stat_addr, options, NULL); | |
373 | } else { | |
374 | struct rusage r; | |
375 | int ret; | |
376 | unsigned int status; | |
377 | mm_segment_t old_fs = get_fs(); | |
378 | ||
379 | set_fs (KERNEL_DS); | |
380 | ret = sys_wait4(pid, | |
381 | (stat_addr ? | |
382 | (unsigned int __user *) &status : NULL), | |
383 | options, (struct rusage __user *) &r); | |
384 | set_fs (old_fs); | |
385 | ||
386 | if (ret > 0) { | |
387 | if (put_compat_rusage(&r, ru)) | |
388 | return -EFAULT; | |
389 | if (stat_addr && put_user(status, stat_addr)) | |
390 | return -EFAULT; | |
391 | } | |
392 | return ret; | |
393 | } | |
394 | } | |
395 | ||
396 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, | |
397 | struct compat_siginfo __user *uinfo, int options, | |
398 | struct compat_rusage __user *uru) | |
399 | { | |
400 | siginfo_t info; | |
401 | struct rusage ru; | |
402 | long ret; | |
403 | mm_segment_t old_fs = get_fs(); | |
404 | ||
405 | memset(&info, 0, sizeof(info)); | |
406 | ||
407 | set_fs(KERNEL_DS); | |
408 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, | |
409 | uru ? (struct rusage __user *)&ru : NULL); | |
410 | set_fs(old_fs); | |
411 | ||
412 | if ((ret < 0) || (info.si_signo == 0)) | |
413 | return ret; | |
414 | ||
415 | if (uru) { | |
416 | ret = put_compat_rusage(&ru, uru); | |
417 | if (ret) | |
418 | return ret; | |
419 | } | |
420 | ||
421 | BUG_ON(info.si_code & __SI_MASK); | |
422 | info.si_code |= __SI_CHLD; | |
423 | return copy_siginfo_to_user32(uinfo, &info); | |
424 | } | |
425 | ||
426 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, | |
427 | unsigned len, cpumask_t *new_mask) | |
428 | { | |
429 | unsigned long *k; | |
430 | ||
431 | if (len < sizeof(cpumask_t)) | |
432 | memset(new_mask, 0, sizeof(cpumask_t)); | |
433 | else if (len > sizeof(cpumask_t)) | |
434 | len = sizeof(cpumask_t); | |
435 | ||
436 | k = cpus_addr(*new_mask); | |
437 | return compat_get_bitmap(k, user_mask_ptr, len * 8); | |
438 | } | |
439 | ||
440 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
441 | unsigned int len, | |
442 | compat_ulong_t __user *user_mask_ptr) | |
443 | { | |
444 | cpumask_t new_mask; | |
445 | int retval; | |
446 | ||
447 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask); | |
448 | if (retval) | |
449 | return retval; | |
450 | ||
451 | return sched_setaffinity(pid, new_mask); | |
452 | } | |
453 | ||
454 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, | |
455 | compat_ulong_t __user *user_mask_ptr) | |
456 | { | |
457 | int ret; | |
458 | cpumask_t mask; | |
459 | unsigned long *k; | |
460 | unsigned int min_length = sizeof(cpumask_t); | |
461 | ||
462 | if (NR_CPUS <= BITS_PER_COMPAT_LONG) | |
463 | min_length = sizeof(compat_ulong_t); | |
464 | ||
465 | if (len < min_length) | |
466 | return -EINVAL; | |
467 | ||
468 | ret = sched_getaffinity(pid, &mask); | |
469 | if (ret < 0) | |
470 | return ret; | |
471 | ||
472 | k = cpus_addr(mask); | |
473 | ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8); | |
474 | if (ret) | |
475 | return ret; | |
476 | ||
477 | return min_length; | |
478 | } | |
479 | ||
480 | static int get_compat_itimerspec(struct itimerspec *dst, | |
481 | struct compat_itimerspec __user *src) | |
482 | { | |
483 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || | |
484 | get_compat_timespec(&dst->it_value, &src->it_value)) | |
485 | return -EFAULT; | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static int put_compat_itimerspec(struct compat_itimerspec __user *dst, | |
490 | struct itimerspec *src) | |
491 | { | |
492 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || | |
493 | put_compat_timespec(&src->it_value, &dst->it_value)) | |
494 | return -EFAULT; | |
495 | return 0; | |
496 | } | |
497 | ||
3a0f69d5 CH |
498 | long compat_sys_timer_create(clockid_t which_clock, |
499 | struct compat_sigevent __user *timer_event_spec, | |
500 | timer_t __user *created_timer_id) | |
501 | { | |
502 | struct sigevent __user *event = NULL; | |
503 | ||
504 | if (timer_event_spec) { | |
505 | struct sigevent kevent; | |
506 | ||
507 | event = compat_alloc_user_space(sizeof(*event)); | |
508 | if (get_compat_sigevent(&kevent, timer_event_spec) || | |
509 | copy_to_user(event, &kevent, sizeof(*event))) | |
510 | return -EFAULT; | |
511 | } | |
512 | ||
513 | return sys_timer_create(which_clock, event, created_timer_id); | |
514 | } | |
515 | ||
1da177e4 LT |
516 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
517 | struct compat_itimerspec __user *new, | |
518 | struct compat_itimerspec __user *old) | |
519 | { | |
520 | long err; | |
521 | mm_segment_t oldfs; | |
522 | struct itimerspec newts, oldts; | |
523 | ||
524 | if (!new) | |
525 | return -EINVAL; | |
526 | if (get_compat_itimerspec(&newts, new)) | |
527 | return -EFAULT; | |
528 | oldfs = get_fs(); | |
529 | set_fs(KERNEL_DS); | |
530 | err = sys_timer_settime(timer_id, flags, | |
531 | (struct itimerspec __user *) &newts, | |
532 | (struct itimerspec __user *) &oldts); | |
533 | set_fs(oldfs); | |
534 | if (!err && old && put_compat_itimerspec(old, &oldts)) | |
535 | return -EFAULT; | |
536 | return err; | |
537 | } | |
538 | ||
539 | long compat_sys_timer_gettime(timer_t timer_id, | |
540 | struct compat_itimerspec __user *setting) | |
541 | { | |
542 | long err; | |
543 | mm_segment_t oldfs; | |
544 | struct itimerspec ts; | |
545 | ||
546 | oldfs = get_fs(); | |
547 | set_fs(KERNEL_DS); | |
548 | err = sys_timer_gettime(timer_id, | |
549 | (struct itimerspec __user *) &ts); | |
550 | set_fs(oldfs); | |
551 | if (!err && put_compat_itimerspec(setting, &ts)) | |
552 | return -EFAULT; | |
553 | return err; | |
554 | } | |
555 | ||
556 | long compat_sys_clock_settime(clockid_t which_clock, | |
557 | struct compat_timespec __user *tp) | |
558 | { | |
559 | long err; | |
560 | mm_segment_t oldfs; | |
561 | struct timespec ts; | |
562 | ||
563 | if (get_compat_timespec(&ts, tp)) | |
564 | return -EFAULT; | |
565 | oldfs = get_fs(); | |
566 | set_fs(KERNEL_DS); | |
567 | err = sys_clock_settime(which_clock, | |
568 | (struct timespec __user *) &ts); | |
569 | set_fs(oldfs); | |
570 | return err; | |
571 | } | |
572 | ||
573 | long compat_sys_clock_gettime(clockid_t which_clock, | |
574 | struct compat_timespec __user *tp) | |
575 | { | |
576 | long err; | |
577 | mm_segment_t oldfs; | |
578 | struct timespec ts; | |
579 | ||
580 | oldfs = get_fs(); | |
581 | set_fs(KERNEL_DS); | |
582 | err = sys_clock_gettime(which_clock, | |
583 | (struct timespec __user *) &ts); | |
584 | set_fs(oldfs); | |
585 | if (!err && put_compat_timespec(&ts, tp)) | |
586 | return -EFAULT; | |
587 | return err; | |
588 | } | |
589 | ||
590 | long compat_sys_clock_getres(clockid_t which_clock, | |
591 | struct compat_timespec __user *tp) | |
592 | { | |
593 | long err; | |
594 | mm_segment_t oldfs; | |
595 | struct timespec ts; | |
596 | ||
597 | oldfs = get_fs(); | |
598 | set_fs(KERNEL_DS); | |
599 | err = sys_clock_getres(which_clock, | |
600 | (struct timespec __user *) &ts); | |
601 | set_fs(oldfs); | |
602 | if (!err && tp && put_compat_timespec(&ts, tp)) | |
603 | return -EFAULT; | |
604 | return err; | |
605 | } | |
606 | ||
1711ef38 TA |
607 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
608 | { | |
609 | long err; | |
610 | mm_segment_t oldfs; | |
611 | struct timespec tu; | |
612 | struct compat_timespec *rmtp = (struct compat_timespec *)(restart->arg1); | |
613 | ||
614 | restart->arg1 = (unsigned long) &tu; | |
615 | oldfs = get_fs(); | |
616 | set_fs(KERNEL_DS); | |
617 | err = clock_nanosleep_restart(restart); | |
618 | set_fs(oldfs); | |
619 | ||
620 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && | |
621 | put_compat_timespec(&tu, rmtp)) | |
622 | return -EFAULT; | |
623 | ||
624 | if (err == -ERESTART_RESTARTBLOCK) { | |
625 | restart->fn = compat_clock_nanosleep_restart; | |
626 | restart->arg1 = (unsigned long) rmtp; | |
627 | } | |
628 | return err; | |
629 | } | |
630 | ||
1da177e4 LT |
631 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
632 | struct compat_timespec __user *rqtp, | |
633 | struct compat_timespec __user *rmtp) | |
634 | { | |
635 | long err; | |
636 | mm_segment_t oldfs; | |
637 | struct timespec in, out; | |
1711ef38 | 638 | struct restart_block *restart; |
1da177e4 LT |
639 | |
640 | if (get_compat_timespec(&in, rqtp)) | |
641 | return -EFAULT; | |
642 | ||
643 | oldfs = get_fs(); | |
644 | set_fs(KERNEL_DS); | |
645 | err = sys_clock_nanosleep(which_clock, flags, | |
646 | (struct timespec __user *) &in, | |
647 | (struct timespec __user *) &out); | |
648 | set_fs(oldfs); | |
1711ef38 | 649 | |
1da177e4 LT |
650 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
651 | put_compat_timespec(&out, rmtp)) | |
652 | return -EFAULT; | |
1711ef38 TA |
653 | |
654 | if (err == -ERESTART_RESTARTBLOCK) { | |
655 | restart = ¤t_thread_info()->restart_block; | |
656 | restart->fn = compat_clock_nanosleep_restart; | |
657 | restart->arg1 = (unsigned long) rmtp; | |
658 | } | |
1da177e4 LT |
659 | return err; |
660 | } | |
661 | ||
662 | /* | |
663 | * We currently only need the following fields from the sigevent | |
664 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes | |
665 | * sigev_notify_thread_id). The others are handled in user mode. | |
666 | * We also assume that copying sigev_value.sival_int is sufficient | |
667 | * to keep all the bits of sigev_value.sival_ptr intact. | |
668 | */ | |
669 | int get_compat_sigevent(struct sigevent *event, | |
670 | const struct compat_sigevent __user *u_event) | |
671 | { | |
51410d3c | 672 | memset(event, 0, sizeof(*event)); |
1da177e4 LT |
673 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
674 | __get_user(event->sigev_value.sival_int, | |
675 | &u_event->sigev_value.sival_int) || | |
676 | __get_user(event->sigev_signo, &u_event->sigev_signo) || | |
677 | __get_user(event->sigev_notify, &u_event->sigev_notify) || | |
678 | __get_user(event->sigev_notify_thread_id, | |
679 | &u_event->sigev_notify_thread_id)) | |
680 | ? -EFAULT : 0; | |
681 | } | |
682 | ||
1da177e4 LT |
683 | long compat_get_bitmap(unsigned long *mask, compat_ulong_t __user *umask, |
684 | unsigned long bitmap_size) | |
685 | { | |
686 | int i, j; | |
687 | unsigned long m; | |
688 | compat_ulong_t um; | |
689 | unsigned long nr_compat_longs; | |
690 | ||
691 | /* align bitmap up to nearest compat_long_t boundary */ | |
692 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
693 | ||
694 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) | |
695 | return -EFAULT; | |
696 | ||
697 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
698 | ||
699 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
700 | m = 0; | |
701 | ||
702 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
703 | /* | |
704 | * We dont want to read past the end of the userspace | |
705 | * bitmap. We must however ensure the end of the | |
706 | * kernel bitmap is zeroed. | |
707 | */ | |
708 | if (nr_compat_longs-- > 0) { | |
709 | if (__get_user(um, umask)) | |
710 | return -EFAULT; | |
711 | } else { | |
712 | um = 0; | |
713 | } | |
714 | ||
715 | umask++; | |
716 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); | |
717 | } | |
718 | *mask++ = m; | |
719 | } | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
724 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
725 | unsigned long bitmap_size) | |
726 | { | |
727 | int i, j; | |
728 | unsigned long m; | |
729 | compat_ulong_t um; | |
730 | unsigned long nr_compat_longs; | |
731 | ||
732 | /* align bitmap up to nearest compat_long_t boundary */ | |
733 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
734 | ||
735 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) | |
736 | return -EFAULT; | |
737 | ||
738 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
739 | ||
740 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
741 | m = *mask++; | |
742 | ||
743 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
744 | um = m; | |
745 | ||
746 | /* | |
747 | * We dont want to write past the end of the userspace | |
748 | * bitmap. | |
749 | */ | |
750 | if (nr_compat_longs-- > 0) { | |
751 | if (__put_user(um, umask)) | |
752 | return -EFAULT; | |
753 | } | |
754 | ||
755 | umask++; | |
756 | m >>= 4*sizeof(um); | |
757 | m >>= 4*sizeof(um); | |
758 | } | |
759 | } | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | void | |
765 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) | |
766 | { | |
767 | switch (_NSIG_WORDS) { | |
1da177e4 LT |
768 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
769 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); | |
770 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); | |
771 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); | |
1da177e4 LT |
772 | } |
773 | } | |
774 | ||
775 | asmlinkage long | |
776 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, | |
777 | struct compat_siginfo __user *uinfo, | |
778 | struct compat_timespec __user *uts, compat_size_t sigsetsize) | |
779 | { | |
780 | compat_sigset_t s32; | |
781 | sigset_t s; | |
782 | int sig; | |
783 | struct timespec t; | |
784 | siginfo_t info; | |
785 | long ret, timeout = 0; | |
786 | ||
787 | if (sigsetsize != sizeof(sigset_t)) | |
788 | return -EINVAL; | |
789 | ||
790 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) | |
791 | return -EFAULT; | |
792 | sigset_from_compat(&s, &s32); | |
793 | sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
794 | signotset(&s); | |
795 | ||
796 | if (uts) { | |
797 | if (get_compat_timespec (&t, uts)) | |
798 | return -EFAULT; | |
799 | if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 | |
800 | || t.tv_sec < 0) | |
801 | return -EINVAL; | |
802 | } | |
803 | ||
804 | spin_lock_irq(¤t->sighand->siglock); | |
805 | sig = dequeue_signal(current, &s, &info); | |
806 | if (!sig) { | |
807 | timeout = MAX_SCHEDULE_TIMEOUT; | |
808 | if (uts) | |
809 | timeout = timespec_to_jiffies(&t) | |
810 | +(t.tv_sec || t.tv_nsec); | |
811 | if (timeout) { | |
812 | current->real_blocked = current->blocked; | |
813 | sigandsets(¤t->blocked, ¤t->blocked, &s); | |
814 | ||
815 | recalc_sigpending(); | |
816 | spin_unlock_irq(¤t->sighand->siglock); | |
817 | ||
75bcc8c5 | 818 | timeout = schedule_timeout_interruptible(timeout); |
1da177e4 LT |
819 | |
820 | spin_lock_irq(¤t->sighand->siglock); | |
821 | sig = dequeue_signal(current, &s, &info); | |
822 | current->blocked = current->real_blocked; | |
823 | siginitset(¤t->real_blocked, 0); | |
824 | recalc_sigpending(); | |
825 | } | |
826 | } | |
827 | spin_unlock_irq(¤t->sighand->siglock); | |
828 | ||
829 | if (sig) { | |
830 | ret = sig; | |
831 | if (uinfo) { | |
832 | if (copy_siginfo_to_user32(uinfo, &info)) | |
833 | ret = -EFAULT; | |
834 | } | |
835 | }else { | |
836 | ret = timeout?-EINTR:-EAGAIN; | |
837 | } | |
838 | return ret; | |
839 | ||
840 | } | |
841 | ||
842 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME | |
843 | ||
844 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ | |
845 | ||
846 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) | |
847 | { | |
848 | compat_time_t i; | |
849 | struct timeval tv; | |
850 | ||
851 | do_gettimeofday(&tv); | |
852 | i = tv.tv_sec; | |
853 | ||
854 | if (tloc) { | |
855 | if (put_user(i,tloc)) | |
856 | i = -EFAULT; | |
857 | } | |
858 | return i; | |
859 | } | |
860 | ||
861 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) | |
862 | { | |
863 | struct timespec tv; | |
864 | int err; | |
865 | ||
866 | if (get_user(tv.tv_sec, tptr)) | |
867 | return -EFAULT; | |
868 | ||
869 | tv.tv_nsec = 0; | |
870 | ||
871 | err = security_settime(&tv, NULL); | |
872 | if (err) | |
873 | return err; | |
874 | ||
875 | do_settimeofday(&tv); | |
876 | return 0; | |
877 | } | |
878 | ||
879 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ | |
150256d8 DW |
880 | |
881 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND | |
882 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) | |
883 | { | |
884 | sigset_t newset; | |
885 | compat_sigset_t newset32; | |
886 | ||
887 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
888 | if (sigsetsize != sizeof(sigset_t)) | |
889 | return -EINVAL; | |
890 | ||
891 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) | |
892 | return -EFAULT; | |
893 | sigset_from_compat(&newset, &newset32); | |
894 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
895 | ||
896 | spin_lock_irq(¤t->sighand->siglock); | |
897 | current->saved_sigmask = current->blocked; | |
898 | current->blocked = newset; | |
899 | recalc_sigpending(); | |
900 | spin_unlock_irq(¤t->sighand->siglock); | |
901 | ||
902 | current->state = TASK_INTERRUPTIBLE; | |
903 | schedule(); | |
904 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
905 | return -ERESTARTNOHAND; | |
906 | } | |
907 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ | |
3158e941 SR |
908 | |
909 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) | |
910 | { | |
911 | struct timex txc; | |
912 | int ret; | |
913 | ||
914 | memset(&txc, 0, sizeof(struct timex)); | |
915 | ||
916 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || | |
917 | __get_user(txc.modes, &utp->modes) || | |
918 | __get_user(txc.offset, &utp->offset) || | |
919 | __get_user(txc.freq, &utp->freq) || | |
920 | __get_user(txc.maxerror, &utp->maxerror) || | |
921 | __get_user(txc.esterror, &utp->esterror) || | |
922 | __get_user(txc.status, &utp->status) || | |
923 | __get_user(txc.constant, &utp->constant) || | |
924 | __get_user(txc.precision, &utp->precision) || | |
925 | __get_user(txc.tolerance, &utp->tolerance) || | |
926 | __get_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
927 | __get_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
928 | __get_user(txc.tick, &utp->tick) || | |
929 | __get_user(txc.ppsfreq, &utp->ppsfreq) || | |
930 | __get_user(txc.jitter, &utp->jitter) || | |
931 | __get_user(txc.shift, &utp->shift) || | |
932 | __get_user(txc.stabil, &utp->stabil) || | |
933 | __get_user(txc.jitcnt, &utp->jitcnt) || | |
934 | __get_user(txc.calcnt, &utp->calcnt) || | |
935 | __get_user(txc.errcnt, &utp->errcnt) || | |
936 | __get_user(txc.stbcnt, &utp->stbcnt)) | |
937 | return -EFAULT; | |
938 | ||
939 | ret = do_adjtimex(&txc); | |
940 | ||
941 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || | |
942 | __put_user(txc.modes, &utp->modes) || | |
943 | __put_user(txc.offset, &utp->offset) || | |
944 | __put_user(txc.freq, &utp->freq) || | |
945 | __put_user(txc.maxerror, &utp->maxerror) || | |
946 | __put_user(txc.esterror, &utp->esterror) || | |
947 | __put_user(txc.status, &utp->status) || | |
948 | __put_user(txc.constant, &utp->constant) || | |
949 | __put_user(txc.precision, &utp->precision) || | |
950 | __put_user(txc.tolerance, &utp->tolerance) || | |
951 | __put_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
952 | __put_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
953 | __put_user(txc.tick, &utp->tick) || | |
954 | __put_user(txc.ppsfreq, &utp->ppsfreq) || | |
955 | __put_user(txc.jitter, &utp->jitter) || | |
956 | __put_user(txc.shift, &utp->shift) || | |
957 | __put_user(txc.stabil, &utp->stabil) || | |
958 | __put_user(txc.jitcnt, &utp->jitcnt) || | |
959 | __put_user(txc.calcnt, &utp->calcnt) || | |
960 | __put_user(txc.errcnt, &utp->errcnt) || | |
961 | __put_user(txc.stbcnt, &utp->stbcnt)) | |
962 | ret = -EFAULT; | |
963 | ||
964 | return ret; | |
965 | } | |
1b2db9fb CL |
966 | |
967 | #ifdef CONFIG_NUMA | |
968 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, | |
9216dfad | 969 | compat_uptr_t __user *pages32, |
1b2db9fb CL |
970 | const int __user *nodes, |
971 | int __user *status, | |
972 | int flags) | |
973 | { | |
974 | const void __user * __user *pages; | |
975 | int i; | |
976 | ||
977 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); | |
978 | for (i = 0; i < nr_pages; i++) { | |
979 | compat_uptr_t p; | |
980 | ||
9216dfad | 981 | if (get_user(p, pages32 + i) || |
1b2db9fb CL |
982 | put_user(compat_ptr(p), pages + i)) |
983 | return -EFAULT; | |
984 | } | |
985 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); | |
986 | } | |
987 | #endif |