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Commit | Line | Data |
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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> |
6e5fdeed | 24 | #include <linux/export.h> |
1b2db9fb | 25 | #include <linux/migrate.h> |
1711ef38 | 26 | #include <linux/posix-timers.h> |
f06febc9 | 27 | #include <linux/times.h> |
e3d5a27d | 28 | #include <linux/ptrace.h> |
5a0e3ad6 | 29 | #include <linux/gfp.h> |
1da177e4 LT |
30 | |
31 | #include <asm/uaccess.h> | |
1da177e4 | 32 | |
65f5d80b RC |
33 | static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) |
34 | { | |
35 | memset(txc, 0, sizeof(struct timex)); | |
36 | ||
37 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || | |
38 | __get_user(txc->modes, &utp->modes) || | |
39 | __get_user(txc->offset, &utp->offset) || | |
40 | __get_user(txc->freq, &utp->freq) || | |
41 | __get_user(txc->maxerror, &utp->maxerror) || | |
42 | __get_user(txc->esterror, &utp->esterror) || | |
43 | __get_user(txc->status, &utp->status) || | |
44 | __get_user(txc->constant, &utp->constant) || | |
45 | __get_user(txc->precision, &utp->precision) || | |
46 | __get_user(txc->tolerance, &utp->tolerance) || | |
47 | __get_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
48 | __get_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
49 | __get_user(txc->tick, &utp->tick) || | |
50 | __get_user(txc->ppsfreq, &utp->ppsfreq) || | |
51 | __get_user(txc->jitter, &utp->jitter) || | |
52 | __get_user(txc->shift, &utp->shift) || | |
53 | __get_user(txc->stabil, &utp->stabil) || | |
54 | __get_user(txc->jitcnt, &utp->jitcnt) || | |
55 | __get_user(txc->calcnt, &utp->calcnt) || | |
56 | __get_user(txc->errcnt, &utp->errcnt) || | |
57 | __get_user(txc->stbcnt, &utp->stbcnt)) | |
58 | return -EFAULT; | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) | |
64 | { | |
65 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || | |
66 | __put_user(txc->modes, &utp->modes) || | |
67 | __put_user(txc->offset, &utp->offset) || | |
68 | __put_user(txc->freq, &utp->freq) || | |
69 | __put_user(txc->maxerror, &utp->maxerror) || | |
70 | __put_user(txc->esterror, &utp->esterror) || | |
71 | __put_user(txc->status, &utp->status) || | |
72 | __put_user(txc->constant, &utp->constant) || | |
73 | __put_user(txc->precision, &utp->precision) || | |
74 | __put_user(txc->tolerance, &utp->tolerance) || | |
75 | __put_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
76 | __put_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
77 | __put_user(txc->tick, &utp->tick) || | |
78 | __put_user(txc->ppsfreq, &utp->ppsfreq) || | |
79 | __put_user(txc->jitter, &utp->jitter) || | |
80 | __put_user(txc->shift, &utp->shift) || | |
81 | __put_user(txc->stabil, &utp->stabil) || | |
82 | __put_user(txc->jitcnt, &utp->jitcnt) || | |
83 | __put_user(txc->calcnt, &utp->calcnt) || | |
84 | __put_user(txc->errcnt, &utp->errcnt) || | |
85 | __put_user(txc->stbcnt, &utp->stbcnt) || | |
86 | __put_user(txc->tai, &utp->tai)) | |
87 | return -EFAULT; | |
88 | return 0; | |
89 | } | |
90 | ||
b418da16 CH |
91 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
92 | struct timezone __user *tz) | |
93 | { | |
94 | if (tv) { | |
95 | struct timeval ktv; | |
96 | do_gettimeofday(&ktv); | |
81993e81 | 97 | if (compat_put_timeval(&ktv, tv)) |
b418da16 CH |
98 | return -EFAULT; |
99 | } | |
100 | if (tz) { | |
101 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
102 | return -EFAULT; | |
103 | } | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, | |
109 | struct timezone __user *tz) | |
110 | { | |
81993e81 PA |
111 | struct timeval user_tv; |
112 | struct timespec new_ts; | |
113 | struct timezone new_tz; | |
b418da16 CH |
114 | |
115 | if (tv) { | |
81993e81 | 116 | if (compat_get_timeval(&user_tv, tv)) |
b418da16 | 117 | return -EFAULT; |
81993e81 PA |
118 | new_ts.tv_sec = user_tv.tv_sec; |
119 | new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; | |
b418da16 CH |
120 | } |
121 | if (tz) { | |
81993e81 | 122 | if (copy_from_user(&new_tz, tz, sizeof(*tz))) |
b418da16 CH |
123 | return -EFAULT; |
124 | } | |
125 | ||
81993e81 | 126 | return do_sys_settimeofday(tv ? &new_ts : NULL, tz ? &new_tz : NULL); |
b418da16 CH |
127 | } |
128 | ||
81993e81 | 129 | static int __compat_get_timeval(struct timeval *tv, const struct compat_timeval __user *ctv) |
6684ba20 PA |
130 | { |
131 | return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) || | |
132 | __get_user(tv->tv_sec, &ctv->tv_sec) || | |
133 | __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; | |
134 | } | |
6684ba20 | 135 | |
81993e81 | 136 | static int __compat_put_timeval(const struct timeval *tv, struct compat_timeval __user *ctv) |
6684ba20 PA |
137 | { |
138 | return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) || | |
139 | __put_user(tv->tv_sec, &ctv->tv_sec) || | |
140 | __put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; | |
141 | } | |
6684ba20 | 142 | |
81993e81 | 143 | static int __compat_get_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
1da177e4 LT |
144 | { |
145 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || | |
146 | __get_user(ts->tv_sec, &cts->tv_sec) || | |
147 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
148 | } | |
149 | ||
81993e81 | 150 | static int __compat_put_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
1da177e4 LT |
151 | { |
152 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || | |
153 | __put_user(ts->tv_sec, &cts->tv_sec) || | |
154 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
155 | } | |
156 | ||
6684ba20 PA |
157 | int compat_get_timeval(struct timeval *tv, const void __user *utv) |
158 | { | |
159 | if (COMPAT_USE_64BIT_TIME) | |
160 | return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0; | |
161 | else | |
81993e81 | 162 | return __compat_get_timeval(tv, utv); |
6684ba20 PA |
163 | } |
164 | EXPORT_SYMBOL_GPL(compat_get_timeval); | |
165 | ||
166 | int compat_put_timeval(const struct timeval *tv, void __user *utv) | |
167 | { | |
168 | if (COMPAT_USE_64BIT_TIME) | |
169 | return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0; | |
170 | else | |
81993e81 | 171 | return __compat_put_timeval(tv, utv); |
6684ba20 PA |
172 | } |
173 | EXPORT_SYMBOL_GPL(compat_put_timeval); | |
174 | ||
175 | int compat_get_timespec(struct timespec *ts, const void __user *uts) | |
176 | { | |
177 | if (COMPAT_USE_64BIT_TIME) | |
178 | return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0; | |
179 | else | |
81993e81 | 180 | return __compat_get_timespec(ts, uts); |
6684ba20 PA |
181 | } |
182 | EXPORT_SYMBOL_GPL(compat_get_timespec); | |
183 | ||
184 | int compat_put_timespec(const struct timespec *ts, void __user *uts) | |
185 | { | |
186 | if (COMPAT_USE_64BIT_TIME) | |
187 | return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0; | |
188 | else | |
81993e81 | 189 | return __compat_put_timespec(ts, uts); |
6684ba20 PA |
190 | } |
191 | EXPORT_SYMBOL_GPL(compat_put_timespec); | |
192 | ||
81993e81 PA |
193 | int compat_convert_timespec(struct timespec __user **kts, |
194 | const void __user *cts) | |
195 | { | |
196 | struct timespec ts; | |
197 | struct timespec __user *uts; | |
198 | ||
199 | if (!cts || COMPAT_USE_64BIT_TIME) { | |
200 | *kts = (struct timespec __user *)cts; | |
201 | return 0; | |
202 | } | |
203 | ||
204 | uts = compat_alloc_user_space(sizeof(ts)); | |
205 | if (!uts) | |
206 | return -EFAULT; | |
207 | if (compat_get_timespec(&ts, cts)) | |
208 | return -EFAULT; | |
209 | if (copy_to_user(uts, &ts, sizeof(ts))) | |
210 | return -EFAULT; | |
211 | ||
212 | *kts = uts; | |
213 | return 0; | |
214 | } | |
215 | ||
41652937 ON |
216 | static long compat_nanosleep_restart(struct restart_block *restart) |
217 | { | |
218 | struct compat_timespec __user *rmtp; | |
219 | struct timespec rmt; | |
220 | mm_segment_t oldfs; | |
221 | long ret; | |
222 | ||
029a07e0 | 223 | restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
41652937 ON |
224 | oldfs = get_fs(); |
225 | set_fs(KERNEL_DS); | |
226 | ret = hrtimer_nanosleep_restart(restart); | |
227 | set_fs(oldfs); | |
228 | ||
229 | if (ret) { | |
029a07e0 | 230 | rmtp = restart->nanosleep.compat_rmtp; |
41652937 | 231 | |
81993e81 | 232 | if (rmtp && compat_put_timespec(&rmt, rmtp)) |
41652937 ON |
233 | return -EFAULT; |
234 | } | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
1da177e4 | 239 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
c70878b4 | 240 | struct compat_timespec __user *rmtp) |
1da177e4 | 241 | { |
c70878b4 | 242 | struct timespec tu, rmt; |
41652937 | 243 | mm_segment_t oldfs; |
c70878b4 | 244 | long ret; |
1da177e4 | 245 | |
81993e81 | 246 | if (compat_get_timespec(&tu, rqtp)) |
1da177e4 LT |
247 | return -EFAULT; |
248 | ||
c70878b4 | 249 | if (!timespec_valid(&tu)) |
1da177e4 LT |
250 | return -EINVAL; |
251 | ||
41652937 ON |
252 | oldfs = get_fs(); |
253 | set_fs(KERNEL_DS); | |
254 | ret = hrtimer_nanosleep(&tu, | |
255 | rmtp ? (struct timespec __user *)&rmt : NULL, | |
256 | HRTIMER_MODE_REL, CLOCK_MONOTONIC); | |
257 | set_fs(oldfs); | |
258 | ||
259 | if (ret) { | |
260 | struct restart_block *restart | |
261 | = ¤t_thread_info()->restart_block; | |
262 | ||
263 | restart->fn = compat_nanosleep_restart; | |
029a07e0 | 264 | restart->nanosleep.compat_rmtp = rmtp; |
1da177e4 | 265 | |
81993e81 | 266 | if (rmtp && compat_put_timespec(&rmt, rmtp)) |
1da177e4 LT |
267 | return -EFAULT; |
268 | } | |
c70878b4 AB |
269 | |
270 | return ret; | |
1da177e4 LT |
271 | } |
272 | ||
273 | static inline long get_compat_itimerval(struct itimerval *o, | |
274 | struct compat_itimerval __user *i) | |
275 | { | |
276 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
277 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | | |
278 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | | |
279 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | | |
280 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); | |
281 | } | |
282 | ||
283 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, | |
284 | struct itimerval *i) | |
285 | { | |
286 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
287 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | | |
288 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | | |
289 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | | |
290 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); | |
291 | } | |
292 | ||
37784074 AV |
293 | COMPAT_SYSCALL_DEFINE2(getitimer, int, which, |
294 | struct compat_itimerval __user *, it) | |
1da177e4 LT |
295 | { |
296 | struct itimerval kit; | |
297 | int error; | |
298 | ||
299 | error = do_getitimer(which, &kit); | |
300 | if (!error && put_compat_itimerval(it, &kit)) | |
301 | error = -EFAULT; | |
302 | return error; | |
303 | } | |
304 | ||
37784074 AV |
305 | COMPAT_SYSCALL_DEFINE3(setitimer, int, which, |
306 | struct compat_itimerval __user *, in, | |
307 | struct compat_itimerval __user *, out) | |
1da177e4 LT |
308 | { |
309 | struct itimerval kin, kout; | |
310 | int error; | |
311 | ||
312 | if (in) { | |
313 | if (get_compat_itimerval(&kin, in)) | |
314 | return -EFAULT; | |
315 | } else | |
316 | memset(&kin, 0, sizeof(kin)); | |
317 | ||
318 | error = do_setitimer(which, &kin, out ? &kout : NULL); | |
319 | if (error || !out) | |
320 | return error; | |
321 | if (put_compat_itimerval(out, &kout)) | |
322 | return -EFAULT; | |
323 | return 0; | |
324 | } | |
325 | ||
f06febc9 FM |
326 | static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
327 | { | |
328 | return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); | |
329 | } | |
330 | ||
1da177e4 LT |
331 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
332 | { | |
1da177e4 | 333 | if (tbuf) { |
f06febc9 | 334 | struct tms tms; |
1da177e4 | 335 | struct compat_tms tmp; |
f06febc9 FM |
336 | |
337 | do_sys_times(&tms); | |
338 | /* Convert our struct tms to the compat version. */ | |
339 | tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); | |
340 | tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); | |
341 | tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); | |
342 | tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); | |
1da177e4 LT |
343 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
344 | return -EFAULT; | |
345 | } | |
e3d5a27d | 346 | force_successful_syscall_return(); |
1da177e4 LT |
347 | return compat_jiffies_to_clock_t(jiffies); |
348 | } | |
349 | ||
be84cb43 CM |
350 | #ifdef __ARCH_WANT_SYS_SIGPENDING |
351 | ||
1da177e4 LT |
352 | /* |
353 | * Assumption: old_sigset_t and compat_old_sigset_t are both | |
354 | * types that can be passed to put_user()/get_user(). | |
355 | */ | |
356 | ||
357 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) | |
358 | { | |
359 | old_sigset_t s; | |
360 | long ret; | |
361 | mm_segment_t old_fs = get_fs(); | |
362 | ||
363 | set_fs(KERNEL_DS); | |
364 | ret = sys_sigpending((old_sigset_t __user *) &s); | |
365 | set_fs(old_fs); | |
366 | if (ret == 0) | |
367 | ret = put_user(s, set); | |
368 | return ret; | |
369 | } | |
370 | ||
be84cb43 CM |
371 | #endif |
372 | ||
373 | #ifdef __ARCH_WANT_SYS_SIGPROCMASK | |
374 | ||
b7dafa0e JK |
375 | /* |
376 | * sys_sigprocmask SIG_SETMASK sets the first (compat) word of the | |
377 | * blocked set of signals to the supplied signal set | |
378 | */ | |
379 | static inline void compat_sig_setmask(sigset_t *blocked, compat_sigset_word set) | |
1da177e4 | 380 | { |
b7dafa0e JK |
381 | memcpy(blocked->sig, &set, sizeof(set)); |
382 | } | |
1da177e4 | 383 | |
5cf22100 AV |
384 | COMPAT_SYSCALL_DEFINE3(sigprocmask, int, how, |
385 | compat_old_sigset_t __user *, nset, | |
386 | compat_old_sigset_t __user *, oset) | |
b7dafa0e JK |
387 | { |
388 | old_sigset_t old_set, new_set; | |
389 | sigset_t new_blocked; | |
390 | ||
391 | old_set = current->blocked.sig[0]; | |
392 | ||
393 | if (nset) { | |
394 | if (get_user(new_set, nset)) | |
395 | return -EFAULT; | |
396 | new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
397 | ||
398 | new_blocked = current->blocked; | |
399 | ||
400 | switch (how) { | |
401 | case SIG_BLOCK: | |
402 | sigaddsetmask(&new_blocked, new_set); | |
403 | break; | |
404 | case SIG_UNBLOCK: | |
405 | sigdelsetmask(&new_blocked, new_set); | |
406 | break; | |
407 | case SIG_SETMASK: | |
408 | compat_sig_setmask(&new_blocked, new_set); | |
409 | break; | |
410 | default: | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | set_current_blocked(&new_blocked); | |
415 | } | |
416 | ||
417 | if (oset) { | |
418 | if (put_user(old_set, oset)) | |
419 | return -EFAULT; | |
420 | } | |
421 | ||
422 | return 0; | |
1da177e4 LT |
423 | } |
424 | ||
be84cb43 CM |
425 | #endif |
426 | ||
1da177e4 LT |
427 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
428 | struct compat_rlimit __user *rlim) | |
429 | { | |
430 | struct rlimit r; | |
1da177e4 LT |
431 | |
432 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || | |
433 | __get_user(r.rlim_cur, &rlim->rlim_cur) || | |
434 | __get_user(r.rlim_max, &rlim->rlim_max)) | |
435 | return -EFAULT; | |
436 | ||
437 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) | |
438 | r.rlim_cur = RLIM_INFINITY; | |
439 | if (r.rlim_max == COMPAT_RLIM_INFINITY) | |
440 | r.rlim_max = RLIM_INFINITY; | |
b9518345 | 441 | return do_prlimit(current, resource, &r, NULL); |
1da177e4 LT |
442 | } |
443 | ||
444 | #ifdef COMPAT_RLIM_OLD_INFINITY | |
445 | ||
446 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, | |
447 | struct compat_rlimit __user *rlim) | |
448 | { | |
449 | struct rlimit r; | |
450 | int ret; | |
451 | mm_segment_t old_fs = get_fs(); | |
452 | ||
453 | set_fs(KERNEL_DS); | |
454 | ret = sys_old_getrlimit(resource, &r); | |
455 | set_fs(old_fs); | |
456 | ||
457 | if (!ret) { | |
458 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) | |
459 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
460 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) | |
461 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
462 | ||
463 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
464 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
465 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
466 | return -EFAULT; | |
467 | } | |
468 | return ret; | |
469 | } | |
470 | ||
471 | #endif | |
472 | ||
b9518345 | 473 | asmlinkage long compat_sys_getrlimit(unsigned int resource, |
1da177e4 LT |
474 | struct compat_rlimit __user *rlim) |
475 | { | |
476 | struct rlimit r; | |
477 | int ret; | |
1da177e4 | 478 | |
b9518345 | 479 | ret = do_prlimit(current, resource, NULL, &r); |
1da177e4 LT |
480 | if (!ret) { |
481 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) | |
482 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
483 | if (r.rlim_max > COMPAT_RLIM_INFINITY) | |
484 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
485 | ||
486 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
487 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
488 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
489 | return -EFAULT; | |
490 | } | |
491 | return ret; | |
492 | } | |
493 | ||
494 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) | |
495 | { | |
496 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || | |
497 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || | |
498 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || | |
499 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || | |
500 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || | |
501 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || | |
502 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || | |
503 | __put_user(r->ru_idrss, &ru->ru_idrss) || | |
504 | __put_user(r->ru_isrss, &ru->ru_isrss) || | |
505 | __put_user(r->ru_minflt, &ru->ru_minflt) || | |
506 | __put_user(r->ru_majflt, &ru->ru_majflt) || | |
507 | __put_user(r->ru_nswap, &ru->ru_nswap) || | |
508 | __put_user(r->ru_inblock, &ru->ru_inblock) || | |
509 | __put_user(r->ru_oublock, &ru->ru_oublock) || | |
510 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || | |
511 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || | |
512 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || | |
513 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || | |
514 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) | |
515 | return -EFAULT; | |
516 | return 0; | |
517 | } | |
518 | ||
8d9807b1 AV |
519 | COMPAT_SYSCALL_DEFINE4(wait4, |
520 | compat_pid_t, pid, | |
521 | compat_uint_t __user *, stat_addr, | |
522 | int, options, | |
523 | struct compat_rusage __user *, ru) | |
1da177e4 LT |
524 | { |
525 | if (!ru) { | |
526 | return sys_wait4(pid, stat_addr, options, NULL); | |
527 | } else { | |
528 | struct rusage r; | |
529 | int ret; | |
530 | unsigned int status; | |
531 | mm_segment_t old_fs = get_fs(); | |
532 | ||
533 | set_fs (KERNEL_DS); | |
534 | ret = sys_wait4(pid, | |
535 | (stat_addr ? | |
536 | (unsigned int __user *) &status : NULL), | |
537 | options, (struct rusage __user *) &r); | |
538 | set_fs (old_fs); | |
539 | ||
540 | if (ret > 0) { | |
541 | if (put_compat_rusage(&r, ru)) | |
542 | return -EFAULT; | |
543 | if (stat_addr && put_user(status, stat_addr)) | |
544 | return -EFAULT; | |
545 | } | |
546 | return ret; | |
547 | } | |
548 | } | |
549 | ||
8d9807b1 AV |
550 | COMPAT_SYSCALL_DEFINE5(waitid, |
551 | int, which, compat_pid_t, pid, | |
552 | struct compat_siginfo __user *, uinfo, int, options, | |
553 | struct compat_rusage __user *, uru) | |
1da177e4 LT |
554 | { |
555 | siginfo_t info; | |
556 | struct rusage ru; | |
557 | long ret; | |
558 | mm_segment_t old_fs = get_fs(); | |
559 | ||
560 | memset(&info, 0, sizeof(info)); | |
561 | ||
562 | set_fs(KERNEL_DS); | |
563 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, | |
564 | uru ? (struct rusage __user *)&ru : NULL); | |
565 | set_fs(old_fs); | |
566 | ||
567 | if ((ret < 0) || (info.si_signo == 0)) | |
568 | return ret; | |
569 | ||
570 | if (uru) { | |
a566c288 AV |
571 | /* sys_waitid() overwrites everything in ru */ |
572 | if (COMPAT_USE_64BIT_TIME) | |
573 | ret = copy_to_user(uru, &ru, sizeof(ru)); | |
574 | else | |
575 | ret = put_compat_rusage(&ru, uru); | |
1da177e4 | 576 | if (ret) |
bffea77c | 577 | return -EFAULT; |
1da177e4 LT |
578 | } |
579 | ||
580 | BUG_ON(info.si_code & __SI_MASK); | |
581 | info.si_code |= __SI_CHLD; | |
582 | return copy_siginfo_to_user32(uinfo, &info); | |
583 | } | |
584 | ||
585 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, | |
a45185d2 | 586 | unsigned len, struct cpumask *new_mask) |
1da177e4 LT |
587 | { |
588 | unsigned long *k; | |
589 | ||
a45185d2 RR |
590 | if (len < cpumask_size()) |
591 | memset(new_mask, 0, cpumask_size()); | |
592 | else if (len > cpumask_size()) | |
593 | len = cpumask_size(); | |
1da177e4 | 594 | |
a45185d2 | 595 | k = cpumask_bits(new_mask); |
1da177e4 LT |
596 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
597 | } | |
598 | ||
599 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
600 | unsigned int len, | |
601 | compat_ulong_t __user *user_mask_ptr) | |
602 | { | |
a45185d2 | 603 | cpumask_var_t new_mask; |
1da177e4 LT |
604 | int retval; |
605 | ||
a45185d2 RR |
606 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
607 | return -ENOMEM; | |
608 | ||
609 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); | |
1da177e4 | 610 | if (retval) |
a45185d2 | 611 | goto out; |
1da177e4 | 612 | |
a45185d2 RR |
613 | retval = sched_setaffinity(pid, new_mask); |
614 | out: | |
615 | free_cpumask_var(new_mask); | |
616 | return retval; | |
1da177e4 LT |
617 | } |
618 | ||
619 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, | |
620 | compat_ulong_t __user *user_mask_ptr) | |
621 | { | |
622 | int ret; | |
a45185d2 | 623 | cpumask_var_t mask; |
1da177e4 | 624 | |
fa9dc265 KM |
625 | if ((len * BITS_PER_BYTE) < nr_cpu_ids) |
626 | return -EINVAL; | |
627 | if (len & (sizeof(compat_ulong_t)-1)) | |
1da177e4 LT |
628 | return -EINVAL; |
629 | ||
a45185d2 RR |
630 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
631 | return -ENOMEM; | |
632 | ||
633 | ret = sched_getaffinity(pid, mask); | |
fa9dc265 KM |
634 | if (ret == 0) { |
635 | size_t retlen = min_t(size_t, len, cpumask_size()); | |
1da177e4 | 636 | |
fa9dc265 KM |
637 | if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) |
638 | ret = -EFAULT; | |
639 | else | |
640 | ret = retlen; | |
641 | } | |
a45185d2 | 642 | free_cpumask_var(mask); |
fa9dc265 | 643 | |
a45185d2 | 644 | return ret; |
1da177e4 LT |
645 | } |
646 | ||
83f5d126 DL |
647 | int get_compat_itimerspec(struct itimerspec *dst, |
648 | const struct compat_itimerspec __user *src) | |
bd3a8492 | 649 | { |
81993e81 PA |
650 | if (__compat_get_timespec(&dst->it_interval, &src->it_interval) || |
651 | __compat_get_timespec(&dst->it_value, &src->it_value)) | |
1da177e4 LT |
652 | return -EFAULT; |
653 | return 0; | |
bd3a8492 | 654 | } |
1da177e4 | 655 | |
83f5d126 DL |
656 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
657 | const struct itimerspec *src) | |
bd3a8492 | 658 | { |
81993e81 PA |
659 | if (__compat_put_timespec(&src->it_interval, &dst->it_interval) || |
660 | __compat_put_timespec(&src->it_value, &dst->it_value)) | |
1da177e4 LT |
661 | return -EFAULT; |
662 | return 0; | |
bd3a8492 | 663 | } |
1da177e4 | 664 | |
3a0f69d5 CH |
665 | long compat_sys_timer_create(clockid_t which_clock, |
666 | struct compat_sigevent __user *timer_event_spec, | |
667 | timer_t __user *created_timer_id) | |
668 | { | |
669 | struct sigevent __user *event = NULL; | |
670 | ||
671 | if (timer_event_spec) { | |
672 | struct sigevent kevent; | |
673 | ||
674 | event = compat_alloc_user_space(sizeof(*event)); | |
675 | if (get_compat_sigevent(&kevent, timer_event_spec) || | |
676 | copy_to_user(event, &kevent, sizeof(*event))) | |
677 | return -EFAULT; | |
678 | } | |
679 | ||
680 | return sys_timer_create(which_clock, event, created_timer_id); | |
681 | } | |
682 | ||
1da177e4 | 683 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
bd3a8492 | 684 | struct compat_itimerspec __user *new, |
1da177e4 | 685 | struct compat_itimerspec __user *old) |
bd3a8492 | 686 | { |
1da177e4 LT |
687 | long err; |
688 | mm_segment_t oldfs; | |
689 | struct itimerspec newts, oldts; | |
690 | ||
691 | if (!new) | |
692 | return -EINVAL; | |
693 | if (get_compat_itimerspec(&newts, new)) | |
bd3a8492 | 694 | return -EFAULT; |
1da177e4 LT |
695 | oldfs = get_fs(); |
696 | set_fs(KERNEL_DS); | |
697 | err = sys_timer_settime(timer_id, flags, | |
698 | (struct itimerspec __user *) &newts, | |
699 | (struct itimerspec __user *) &oldts); | |
bd3a8492 | 700 | set_fs(oldfs); |
1da177e4 LT |
701 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
702 | return -EFAULT; | |
703 | return err; | |
bd3a8492 | 704 | } |
1da177e4 LT |
705 | |
706 | long compat_sys_timer_gettime(timer_t timer_id, | |
707 | struct compat_itimerspec __user *setting) | |
bd3a8492 | 708 | { |
1da177e4 LT |
709 | long err; |
710 | mm_segment_t oldfs; | |
bd3a8492 | 711 | struct itimerspec ts; |
1da177e4 LT |
712 | |
713 | oldfs = get_fs(); | |
714 | set_fs(KERNEL_DS); | |
715 | err = sys_timer_gettime(timer_id, | |
bd3a8492 DW |
716 | (struct itimerspec __user *) &ts); |
717 | set_fs(oldfs); | |
1da177e4 LT |
718 | if (!err && put_compat_itimerspec(setting, &ts)) |
719 | return -EFAULT; | |
720 | return err; | |
bd3a8492 | 721 | } |
1da177e4 LT |
722 | |
723 | long compat_sys_clock_settime(clockid_t which_clock, | |
724 | struct compat_timespec __user *tp) | |
725 | { | |
726 | long err; | |
727 | mm_segment_t oldfs; | |
bd3a8492 | 728 | struct timespec ts; |
1da177e4 | 729 | |
81993e81 | 730 | if (compat_get_timespec(&ts, tp)) |
bd3a8492 | 731 | return -EFAULT; |
1da177e4 | 732 | oldfs = get_fs(); |
bd3a8492 | 733 | set_fs(KERNEL_DS); |
1da177e4 LT |
734 | err = sys_clock_settime(which_clock, |
735 | (struct timespec __user *) &ts); | |
736 | set_fs(oldfs); | |
737 | return err; | |
bd3a8492 | 738 | } |
1da177e4 LT |
739 | |
740 | long compat_sys_clock_gettime(clockid_t which_clock, | |
741 | struct compat_timespec __user *tp) | |
742 | { | |
743 | long err; | |
744 | mm_segment_t oldfs; | |
bd3a8492 | 745 | struct timespec ts; |
1da177e4 LT |
746 | |
747 | oldfs = get_fs(); | |
748 | set_fs(KERNEL_DS); | |
749 | err = sys_clock_gettime(which_clock, | |
750 | (struct timespec __user *) &ts); | |
751 | set_fs(oldfs); | |
81993e81 | 752 | if (!err && compat_put_timespec(&ts, tp)) |
bd3a8492 | 753 | return -EFAULT; |
1da177e4 | 754 | return err; |
bd3a8492 | 755 | } |
1da177e4 | 756 | |
f1f1d5eb RC |
757 | long compat_sys_clock_adjtime(clockid_t which_clock, |
758 | struct compat_timex __user *utp) | |
759 | { | |
760 | struct timex txc; | |
761 | mm_segment_t oldfs; | |
762 | int err, ret; | |
763 | ||
764 | err = compat_get_timex(&txc, utp); | |
765 | if (err) | |
766 | return err; | |
767 | ||
768 | oldfs = get_fs(); | |
769 | set_fs(KERNEL_DS); | |
770 | ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); | |
771 | set_fs(oldfs); | |
772 | ||
773 | err = compat_put_timex(utp, &txc); | |
774 | if (err) | |
775 | return err; | |
776 | ||
777 | return ret; | |
778 | } | |
779 | ||
1da177e4 LT |
780 | long compat_sys_clock_getres(clockid_t which_clock, |
781 | struct compat_timespec __user *tp) | |
782 | { | |
783 | long err; | |
784 | mm_segment_t oldfs; | |
bd3a8492 | 785 | struct timespec ts; |
1da177e4 LT |
786 | |
787 | oldfs = get_fs(); | |
788 | set_fs(KERNEL_DS); | |
789 | err = sys_clock_getres(which_clock, | |
790 | (struct timespec __user *) &ts); | |
791 | set_fs(oldfs); | |
81993e81 | 792 | if (!err && tp && compat_put_timespec(&ts, tp)) |
bd3a8492 | 793 | return -EFAULT; |
1da177e4 | 794 | return err; |
bd3a8492 | 795 | } |
1da177e4 | 796 | |
1711ef38 TA |
797 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
798 | { | |
799 | long err; | |
800 | mm_segment_t oldfs; | |
801 | struct timespec tu; | |
029a07e0 | 802 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
1711ef38 | 803 | |
029a07e0 | 804 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
1711ef38 TA |
805 | oldfs = get_fs(); |
806 | set_fs(KERNEL_DS); | |
807 | err = clock_nanosleep_restart(restart); | |
808 | set_fs(oldfs); | |
809 | ||
810 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && | |
81993e81 | 811 | compat_put_timespec(&tu, rmtp)) |
1711ef38 TA |
812 | return -EFAULT; |
813 | ||
814 | if (err == -ERESTART_RESTARTBLOCK) { | |
815 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 816 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 TA |
817 | } |
818 | return err; | |
819 | } | |
820 | ||
1da177e4 LT |
821 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
822 | struct compat_timespec __user *rqtp, | |
823 | struct compat_timespec __user *rmtp) | |
824 | { | |
825 | long err; | |
826 | mm_segment_t oldfs; | |
bd3a8492 | 827 | struct timespec in, out; |
1711ef38 | 828 | struct restart_block *restart; |
1da177e4 | 829 | |
81993e81 | 830 | if (compat_get_timespec(&in, rqtp)) |
1da177e4 LT |
831 | return -EFAULT; |
832 | ||
833 | oldfs = get_fs(); | |
834 | set_fs(KERNEL_DS); | |
835 | err = sys_clock_nanosleep(which_clock, flags, | |
836 | (struct timespec __user *) &in, | |
837 | (struct timespec __user *) &out); | |
838 | set_fs(oldfs); | |
1711ef38 | 839 | |
1da177e4 | 840 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
81993e81 | 841 | compat_put_timespec(&out, rmtp)) |
1da177e4 | 842 | return -EFAULT; |
1711ef38 TA |
843 | |
844 | if (err == -ERESTART_RESTARTBLOCK) { | |
845 | restart = ¤t_thread_info()->restart_block; | |
846 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 847 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 | 848 | } |
bd3a8492 DW |
849 | return err; |
850 | } | |
1da177e4 LT |
851 | |
852 | /* | |
853 | * We currently only need the following fields from the sigevent | |
854 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes | |
855 | * sigev_notify_thread_id). The others are handled in user mode. | |
856 | * We also assume that copying sigev_value.sival_int is sufficient | |
857 | * to keep all the bits of sigev_value.sival_ptr intact. | |
858 | */ | |
859 | int get_compat_sigevent(struct sigevent *event, | |
860 | const struct compat_sigevent __user *u_event) | |
861 | { | |
51410d3c | 862 | memset(event, 0, sizeof(*event)); |
1da177e4 LT |
863 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
864 | __get_user(event->sigev_value.sival_int, | |
865 | &u_event->sigev_value.sival_int) || | |
866 | __get_user(event->sigev_signo, &u_event->sigev_signo) || | |
867 | __get_user(event->sigev_notify, &u_event->sigev_notify) || | |
868 | __get_user(event->sigev_notify_thread_id, | |
869 | &u_event->sigev_notify_thread_id)) | |
870 | ? -EFAULT : 0; | |
871 | } | |
872 | ||
5fa3839a | 873 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4 LT |
874 | unsigned long bitmap_size) |
875 | { | |
876 | int i, j; | |
877 | unsigned long m; | |
878 | compat_ulong_t um; | |
879 | unsigned long nr_compat_longs; | |
880 | ||
881 | /* align bitmap up to nearest compat_long_t boundary */ | |
882 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
883 | ||
884 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) | |
885 | return -EFAULT; | |
886 | ||
887 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
888 | ||
889 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
890 | m = 0; | |
891 | ||
892 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
893 | /* | |
894 | * We dont want to read past the end of the userspace | |
895 | * bitmap. We must however ensure the end of the | |
896 | * kernel bitmap is zeroed. | |
897 | */ | |
898 | if (nr_compat_longs-- > 0) { | |
899 | if (__get_user(um, umask)) | |
900 | return -EFAULT; | |
901 | } else { | |
902 | um = 0; | |
903 | } | |
904 | ||
905 | umask++; | |
906 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); | |
907 | } | |
908 | *mask++ = m; | |
909 | } | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
915 | unsigned long bitmap_size) | |
916 | { | |
917 | int i, j; | |
918 | unsigned long m; | |
919 | compat_ulong_t um; | |
920 | unsigned long nr_compat_longs; | |
921 | ||
922 | /* align bitmap up to nearest compat_long_t boundary */ | |
923 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
924 | ||
925 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) | |
926 | return -EFAULT; | |
927 | ||
928 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
929 | ||
930 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
931 | m = *mask++; | |
932 | ||
933 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
934 | um = m; | |
935 | ||
936 | /* | |
937 | * We dont want to write past the end of the userspace | |
938 | * bitmap. | |
939 | */ | |
940 | if (nr_compat_longs-- > 0) { | |
941 | if (__put_user(um, umask)) | |
942 | return -EFAULT; | |
943 | } | |
944 | ||
945 | umask++; | |
946 | m >>= 4*sizeof(um); | |
947 | m >>= 4*sizeof(um); | |
948 | } | |
949 | } | |
950 | ||
951 | return 0; | |
952 | } | |
953 | ||
954 | void | |
322a56cb | 955 | sigset_from_compat(sigset_t *set, const compat_sigset_t *compat) |
1da177e4 LT |
956 | { |
957 | switch (_NSIG_WORDS) { | |
1da177e4 LT |
958 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
959 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); | |
960 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); | |
961 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); | |
1da177e4 LT |
962 | } |
963 | } | |
1dda606c | 964 | EXPORT_SYMBOL_GPL(sigset_from_compat); |
1da177e4 | 965 | |
322a56cb AV |
966 | void |
967 | sigset_to_compat(compat_sigset_t *compat, const sigset_t *set) | |
968 | { | |
969 | switch (_NSIG_WORDS) { | |
970 | case 4: compat->sig[7] = (set->sig[3] >> 32); compat->sig[6] = set->sig[3]; | |
971 | case 3: compat->sig[5] = (set->sig[2] >> 32); compat->sig[4] = set->sig[2]; | |
972 | case 2: compat->sig[3] = (set->sig[1] >> 32); compat->sig[2] = set->sig[1]; | |
973 | case 1: compat->sig[1] = (set->sig[0] >> 32); compat->sig[0] = set->sig[0]; | |
974 | } | |
975 | } | |
976 | ||
28d27f2d AV |
977 | COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese, |
978 | struct compat_siginfo __user *, uinfo, | |
979 | struct compat_timespec __user *, uts, compat_size_t, sigsetsize) | |
1da177e4 LT |
980 | { |
981 | compat_sigset_t s32; | |
982 | sigset_t s; | |
1da177e4 LT |
983 | struct timespec t; |
984 | siginfo_t info; | |
943df148 | 985 | long ret; |
1da177e4 LT |
986 | |
987 | if (sigsetsize != sizeof(sigset_t)) | |
988 | return -EINVAL; | |
989 | ||
990 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) | |
991 | return -EFAULT; | |
992 | sigset_from_compat(&s, &s32); | |
1da177e4 LT |
993 | |
994 | if (uts) { | |
b2ddedcd | 995 | if (compat_get_timespec(&t, uts)) |
1da177e4 | 996 | return -EFAULT; |
1da177e4 LT |
997 | } |
998 | ||
943df148 | 999 | ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
1da177e4 | 1000 | |
943df148 ON |
1001 | if (ret > 0 && uinfo) { |
1002 | if (copy_siginfo_to_user32(uinfo, &info)) | |
1003 | ret = -EFAULT; | |
1da177e4 | 1004 | } |
943df148 | 1005 | |
1da177e4 | 1006 | return ret; |
62ab4505 TG |
1007 | } |
1008 | ||
1da177e4 LT |
1009 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
1010 | ||
1011 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ | |
1012 | ||
1013 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) | |
1014 | { | |
1015 | compat_time_t i; | |
1016 | struct timeval tv; | |
1017 | ||
1018 | do_gettimeofday(&tv); | |
1019 | i = tv.tv_sec; | |
1020 | ||
1021 | if (tloc) { | |
1022 | if (put_user(i,tloc)) | |
e3d5a27d | 1023 | return -EFAULT; |
1da177e4 | 1024 | } |
e3d5a27d | 1025 | force_successful_syscall_return(); |
1da177e4 LT |
1026 | return i; |
1027 | } | |
1028 | ||
1029 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) | |
1030 | { | |
1031 | struct timespec tv; | |
1032 | int err; | |
1033 | ||
1034 | if (get_user(tv.tv_sec, tptr)) | |
1035 | return -EFAULT; | |
1036 | ||
1037 | tv.tv_nsec = 0; | |
1038 | ||
1039 | err = security_settime(&tv, NULL); | |
1040 | if (err) | |
1041 | return err; | |
1042 | ||
1043 | do_settimeofday(&tv); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ | |
150256d8 | 1048 | |
3158e941 SR |
1049 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
1050 | { | |
1051 | struct timex txc; | |
65f5d80b | 1052 | int err, ret; |
3158e941 | 1053 | |
65f5d80b RC |
1054 | err = compat_get_timex(&txc, utp); |
1055 | if (err) | |
1056 | return err; | |
3158e941 SR |
1057 | |
1058 | ret = do_adjtimex(&txc); | |
1059 | ||
65f5d80b RC |
1060 | err = compat_put_timex(utp, &txc); |
1061 | if (err) | |
1062 | return err; | |
3158e941 SR |
1063 | |
1064 | return ret; | |
1065 | } | |
1b2db9fb CL |
1066 | |
1067 | #ifdef CONFIG_NUMA | |
1068 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, | |
9216dfad | 1069 | compat_uptr_t __user *pages32, |
1b2db9fb CL |
1070 | const int __user *nodes, |
1071 | int __user *status, | |
1072 | int flags) | |
1073 | { | |
1074 | const void __user * __user *pages; | |
1075 | int i; | |
1076 | ||
1077 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); | |
1078 | for (i = 0; i < nr_pages; i++) { | |
1079 | compat_uptr_t p; | |
1080 | ||
9216dfad | 1081 | if (get_user(p, pages32 + i) || |
1b2db9fb CL |
1082 | put_user(compat_ptr(p), pages + i)) |
1083 | return -EFAULT; | |
1084 | } | |
1085 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); | |
1086 | } | |
3fd59397 SR |
1087 | |
1088 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, | |
1089 | compat_ulong_t maxnode, | |
1090 | const compat_ulong_t __user *old_nodes, | |
1091 | const compat_ulong_t __user *new_nodes) | |
1092 | { | |
1093 | unsigned long __user *old = NULL; | |
1094 | unsigned long __user *new = NULL; | |
1095 | nodemask_t tmp_mask; | |
1096 | unsigned long nr_bits; | |
1097 | unsigned long size; | |
1098 | ||
1099 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); | |
1100 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; | |
1101 | if (old_nodes) { | |
1102 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) | |
1103 | return -EFAULT; | |
1104 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); | |
1105 | if (new_nodes) | |
1106 | new = old + size / sizeof(unsigned long); | |
1107 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) | |
1108 | return -EFAULT; | |
1109 | } | |
1110 | if (new_nodes) { | |
1111 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) | |
1112 | return -EFAULT; | |
1113 | if (new == NULL) | |
1114 | new = compat_alloc_user_space(size); | |
1115 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) | |
1116 | return -EFAULT; | |
1117 | } | |
1118 | return sys_migrate_pages(pid, nr_bits + 1, old, new); | |
1119 | } | |
1b2db9fb | 1120 | #endif |
d4d23add | 1121 | |
6883da8c AV |
1122 | COMPAT_SYSCALL_DEFINE2(sched_rr_get_interval, |
1123 | compat_pid_t, pid, | |
1124 | struct compat_timespec __user *, interval) | |
0ad50c38 CM |
1125 | { |
1126 | struct timespec t; | |
1127 | int ret; | |
1128 | mm_segment_t old_fs = get_fs(); | |
1129 | ||
1130 | set_fs(KERNEL_DS); | |
1131 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); | |
1132 | set_fs(old_fs); | |
81993e81 | 1133 | if (compat_put_timespec(&t, interval)) |
0ad50c38 CM |
1134 | return -EFAULT; |
1135 | return ret; | |
1136 | } | |
0ad50c38 | 1137 | |
c41d68a5 PA |
1138 | /* |
1139 | * Allocate user-space memory for the duration of a single system call, | |
1140 | * in order to marshall parameters inside a compat thunk. | |
1141 | */ | |
1142 | void __user *compat_alloc_user_space(unsigned long len) | |
1143 | { | |
1144 | void __user *ptr; | |
1145 | ||
1146 | /* If len would occupy more than half of the entire compat space... */ | |
1147 | if (unlikely(len > (((compat_uptr_t)~0) >> 1))) | |
1148 | return NULL; | |
1149 | ||
1150 | ptr = arch_compat_alloc_user_space(len); | |
1151 | ||
1152 | if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) | |
1153 | return NULL; | |
1154 | ||
1155 | return ptr; | |
1156 | } | |
1157 | EXPORT_SYMBOL_GPL(compat_alloc_user_space); |