Commit | Line | Data |
---|---|---|
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 | |
b418da16 | 33 | /* |
6684ba20 | 34 | * Get/set struct timeval with struct timespec on the native side |
b418da16 | 35 | */ |
6684ba20 PA |
36 | static int compat_get_timeval_convert(struct timespec *o, |
37 | struct compat_timeval __user *i) | |
b418da16 CH |
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 | ||
6684ba20 PA |
48 | static int compat_put_timeval_convert(struct compat_timeval __user *o, |
49 | struct timeval *i) | |
b418da16 CH |
50 | { |
51 | return (put_user(i->tv_sec, &o->tv_sec) || | |
52 | put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; | |
53 | } | |
54 | ||
65f5d80b RC |
55 | static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) |
56 | { | |
57 | memset(txc, 0, sizeof(struct timex)); | |
58 | ||
59 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || | |
60 | __get_user(txc->modes, &utp->modes) || | |
61 | __get_user(txc->offset, &utp->offset) || | |
62 | __get_user(txc->freq, &utp->freq) || | |
63 | __get_user(txc->maxerror, &utp->maxerror) || | |
64 | __get_user(txc->esterror, &utp->esterror) || | |
65 | __get_user(txc->status, &utp->status) || | |
66 | __get_user(txc->constant, &utp->constant) || | |
67 | __get_user(txc->precision, &utp->precision) || | |
68 | __get_user(txc->tolerance, &utp->tolerance) || | |
69 | __get_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
70 | __get_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
71 | __get_user(txc->tick, &utp->tick) || | |
72 | __get_user(txc->ppsfreq, &utp->ppsfreq) || | |
73 | __get_user(txc->jitter, &utp->jitter) || | |
74 | __get_user(txc->shift, &utp->shift) || | |
75 | __get_user(txc->stabil, &utp->stabil) || | |
76 | __get_user(txc->jitcnt, &utp->jitcnt) || | |
77 | __get_user(txc->calcnt, &utp->calcnt) || | |
78 | __get_user(txc->errcnt, &utp->errcnt) || | |
79 | __get_user(txc->stbcnt, &utp->stbcnt)) | |
80 | return -EFAULT; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) | |
86 | { | |
87 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || | |
88 | __put_user(txc->modes, &utp->modes) || | |
89 | __put_user(txc->offset, &utp->offset) || | |
90 | __put_user(txc->freq, &utp->freq) || | |
91 | __put_user(txc->maxerror, &utp->maxerror) || | |
92 | __put_user(txc->esterror, &utp->esterror) || | |
93 | __put_user(txc->status, &utp->status) || | |
94 | __put_user(txc->constant, &utp->constant) || | |
95 | __put_user(txc->precision, &utp->precision) || | |
96 | __put_user(txc->tolerance, &utp->tolerance) || | |
97 | __put_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
98 | __put_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
99 | __put_user(txc->tick, &utp->tick) || | |
100 | __put_user(txc->ppsfreq, &utp->ppsfreq) || | |
101 | __put_user(txc->jitter, &utp->jitter) || | |
102 | __put_user(txc->shift, &utp->shift) || | |
103 | __put_user(txc->stabil, &utp->stabil) || | |
104 | __put_user(txc->jitcnt, &utp->jitcnt) || | |
105 | __put_user(txc->calcnt, &utp->calcnt) || | |
106 | __put_user(txc->errcnt, &utp->errcnt) || | |
107 | __put_user(txc->stbcnt, &utp->stbcnt) || | |
108 | __put_user(txc->tai, &utp->tai)) | |
109 | return -EFAULT; | |
110 | return 0; | |
111 | } | |
112 | ||
b418da16 CH |
113 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
114 | struct timezone __user *tz) | |
115 | { | |
116 | if (tv) { | |
117 | struct timeval ktv; | |
118 | do_gettimeofday(&ktv); | |
6684ba20 | 119 | if (compat_put_timeval_convert(tv, &ktv)) |
b418da16 CH |
120 | return -EFAULT; |
121 | } | |
122 | if (tz) { | |
123 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
124 | return -EFAULT; | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, | |
131 | struct timezone __user *tz) | |
132 | { | |
133 | struct timespec kts; | |
134 | struct timezone ktz; | |
135 | ||
136 | if (tv) { | |
6684ba20 | 137 | if (compat_get_timeval_convert(&kts, tv)) |
b418da16 CH |
138 | return -EFAULT; |
139 | } | |
140 | if (tz) { | |
141 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
142 | return -EFAULT; | |
143 | } | |
144 | ||
145 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
146 | } | |
147 | ||
6684ba20 PA |
148 | int get_compat_timeval(struct timeval *tv, const struct compat_timeval __user *ctv) |
149 | { | |
150 | return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) || | |
151 | __get_user(tv->tv_sec, &ctv->tv_sec) || | |
152 | __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(get_compat_timeval); | |
155 | ||
156 | int put_compat_timeval(const struct timeval *tv, struct compat_timeval __user *ctv) | |
157 | { | |
158 | return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) || | |
159 | __put_user(tv->tv_sec, &ctv->tv_sec) || | |
160 | __put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0; | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(put_compat_timeval); | |
163 | ||
1da177e4 LT |
164 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
165 | { | |
166 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || | |
167 | __get_user(ts->tv_sec, &cts->tv_sec) || | |
168 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
169 | } | |
6684ba20 | 170 | EXPORT_SYMBOL_GPL(get_compat_timespec); |
1da177e4 LT |
171 | |
172 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) | |
173 | { | |
174 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || | |
175 | __put_user(ts->tv_sec, &cts->tv_sec) || | |
176 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
177 | } | |
2330fb82 | 178 | EXPORT_SYMBOL_GPL(put_compat_timespec); |
1da177e4 | 179 | |
6684ba20 PA |
180 | int compat_get_timeval(struct timeval *tv, const void __user *utv) |
181 | { | |
182 | if (COMPAT_USE_64BIT_TIME) | |
183 | return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0; | |
184 | else | |
185 | return get_compat_timeval(tv, utv); | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(compat_get_timeval); | |
188 | ||
189 | int compat_put_timeval(const struct timeval *tv, void __user *utv) | |
190 | { | |
191 | if (COMPAT_USE_64BIT_TIME) | |
192 | return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0; | |
193 | else | |
194 | return put_compat_timeval(tv, utv); | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(compat_put_timeval); | |
197 | ||
198 | int compat_get_timespec(struct timespec *ts, const void __user *uts) | |
199 | { | |
200 | if (COMPAT_USE_64BIT_TIME) | |
201 | return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0; | |
202 | else | |
203 | return get_compat_timespec(ts, uts); | |
204 | } | |
205 | EXPORT_SYMBOL_GPL(compat_get_timespec); | |
206 | ||
207 | int compat_put_timespec(const struct timespec *ts, void __user *uts) | |
208 | { | |
209 | if (COMPAT_USE_64BIT_TIME) | |
210 | return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0; | |
211 | else | |
212 | return put_compat_timespec(ts, uts); | |
213 | } | |
214 | EXPORT_SYMBOL_GPL(compat_put_timespec); | |
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 ON |
231 | |
232 | if (rmtp && put_compat_timespec(&rmt, rmtp)) | |
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 | |
c70878b4 | 246 | if (get_compat_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 | |
41652937 | 266 | if (rmtp && put_compat_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 | ||
293 | asmlinkage long compat_sys_getitimer(int which, | |
294 | struct compat_itimerval __user *it) | |
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 | ||
305 | asmlinkage long compat_sys_setitimer(int which, | |
306 | struct compat_itimerval __user *in, | |
307 | struct compat_itimerval __user *out) | |
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 | ||
1da177e4 LT |
375 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
376 | compat_old_sigset_t __user *oset) | |
377 | { | |
378 | old_sigset_t s; | |
379 | long ret; | |
380 | mm_segment_t old_fs; | |
381 | ||
382 | if (set && get_user(s, set)) | |
383 | return -EFAULT; | |
384 | old_fs = get_fs(); | |
385 | set_fs(KERNEL_DS); | |
386 | ret = sys_sigprocmask(how, | |
387 | set ? (old_sigset_t __user *) &s : NULL, | |
388 | oset ? (old_sigset_t __user *) &s : NULL); | |
389 | set_fs(old_fs); | |
390 | if (ret == 0) | |
391 | if (oset) | |
392 | ret = put_user(s, oset); | |
393 | return ret; | |
394 | } | |
395 | ||
be84cb43 CM |
396 | #endif |
397 | ||
1da177e4 LT |
398 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
399 | struct compat_rlimit __user *rlim) | |
400 | { | |
401 | struct rlimit r; | |
1da177e4 LT |
402 | |
403 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || | |
404 | __get_user(r.rlim_cur, &rlim->rlim_cur) || | |
405 | __get_user(r.rlim_max, &rlim->rlim_max)) | |
406 | return -EFAULT; | |
407 | ||
408 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) | |
409 | r.rlim_cur = RLIM_INFINITY; | |
410 | if (r.rlim_max == COMPAT_RLIM_INFINITY) | |
411 | r.rlim_max = RLIM_INFINITY; | |
b9518345 | 412 | return do_prlimit(current, resource, &r, NULL); |
1da177e4 LT |
413 | } |
414 | ||
415 | #ifdef COMPAT_RLIM_OLD_INFINITY | |
416 | ||
417 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, | |
418 | struct compat_rlimit __user *rlim) | |
419 | { | |
420 | struct rlimit r; | |
421 | int ret; | |
422 | mm_segment_t old_fs = get_fs(); | |
423 | ||
424 | set_fs(KERNEL_DS); | |
425 | ret = sys_old_getrlimit(resource, &r); | |
426 | set_fs(old_fs); | |
427 | ||
428 | if (!ret) { | |
429 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) | |
430 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
431 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) | |
432 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
433 | ||
434 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
435 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
436 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
437 | return -EFAULT; | |
438 | } | |
439 | return ret; | |
440 | } | |
441 | ||
442 | #endif | |
443 | ||
b9518345 | 444 | asmlinkage long compat_sys_getrlimit(unsigned int resource, |
1da177e4 LT |
445 | struct compat_rlimit __user *rlim) |
446 | { | |
447 | struct rlimit r; | |
448 | int ret; | |
1da177e4 | 449 | |
b9518345 | 450 | ret = do_prlimit(current, resource, NULL, &r); |
1da177e4 LT |
451 | if (!ret) { |
452 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) | |
453 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
454 | if (r.rlim_max > COMPAT_RLIM_INFINITY) | |
455 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
456 | ||
457 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
458 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
459 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
460 | return -EFAULT; | |
461 | } | |
462 | return ret; | |
463 | } | |
464 | ||
465 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) | |
466 | { | |
467 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || | |
468 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || | |
469 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || | |
470 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || | |
471 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || | |
472 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || | |
473 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || | |
474 | __put_user(r->ru_idrss, &ru->ru_idrss) || | |
475 | __put_user(r->ru_isrss, &ru->ru_isrss) || | |
476 | __put_user(r->ru_minflt, &ru->ru_minflt) || | |
477 | __put_user(r->ru_majflt, &ru->ru_majflt) || | |
478 | __put_user(r->ru_nswap, &ru->ru_nswap) || | |
479 | __put_user(r->ru_inblock, &ru->ru_inblock) || | |
480 | __put_user(r->ru_oublock, &ru->ru_oublock) || | |
481 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || | |
482 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || | |
483 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || | |
484 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || | |
485 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) | |
486 | return -EFAULT; | |
487 | return 0; | |
488 | } | |
489 | ||
490 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) | |
491 | { | |
492 | struct rusage r; | |
493 | int ret; | |
494 | mm_segment_t old_fs = get_fs(); | |
495 | ||
496 | set_fs(KERNEL_DS); | |
497 | ret = sys_getrusage(who, (struct rusage __user *) &r); | |
498 | set_fs(old_fs); | |
499 | ||
500 | if (ret) | |
501 | return ret; | |
502 | ||
503 | if (put_compat_rusage(&r, ru)) | |
504 | return -EFAULT; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | asmlinkage long | |
510 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, | |
511 | struct compat_rusage __user *ru) | |
512 | { | |
513 | if (!ru) { | |
514 | return sys_wait4(pid, stat_addr, options, NULL); | |
515 | } else { | |
516 | struct rusage r; | |
517 | int ret; | |
518 | unsigned int status; | |
519 | mm_segment_t old_fs = get_fs(); | |
520 | ||
521 | set_fs (KERNEL_DS); | |
522 | ret = sys_wait4(pid, | |
523 | (stat_addr ? | |
524 | (unsigned int __user *) &status : NULL), | |
525 | options, (struct rusage __user *) &r); | |
526 | set_fs (old_fs); | |
527 | ||
528 | if (ret > 0) { | |
529 | if (put_compat_rusage(&r, ru)) | |
530 | return -EFAULT; | |
531 | if (stat_addr && put_user(status, stat_addr)) | |
532 | return -EFAULT; | |
533 | } | |
534 | return ret; | |
535 | } | |
536 | } | |
537 | ||
538 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, | |
539 | struct compat_siginfo __user *uinfo, int options, | |
540 | struct compat_rusage __user *uru) | |
541 | { | |
542 | siginfo_t info; | |
543 | struct rusage ru; | |
544 | long ret; | |
545 | mm_segment_t old_fs = get_fs(); | |
546 | ||
547 | memset(&info, 0, sizeof(info)); | |
548 | ||
549 | set_fs(KERNEL_DS); | |
550 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, | |
551 | uru ? (struct rusage __user *)&ru : NULL); | |
552 | set_fs(old_fs); | |
553 | ||
554 | if ((ret < 0) || (info.si_signo == 0)) | |
555 | return ret; | |
556 | ||
557 | if (uru) { | |
558 | ret = put_compat_rusage(&ru, uru); | |
559 | if (ret) | |
560 | return ret; | |
561 | } | |
562 | ||
563 | BUG_ON(info.si_code & __SI_MASK); | |
564 | info.si_code |= __SI_CHLD; | |
565 | return copy_siginfo_to_user32(uinfo, &info); | |
566 | } | |
567 | ||
568 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, | |
a45185d2 | 569 | unsigned len, struct cpumask *new_mask) |
1da177e4 LT |
570 | { |
571 | unsigned long *k; | |
572 | ||
a45185d2 RR |
573 | if (len < cpumask_size()) |
574 | memset(new_mask, 0, cpumask_size()); | |
575 | else if (len > cpumask_size()) | |
576 | len = cpumask_size(); | |
1da177e4 | 577 | |
a45185d2 | 578 | k = cpumask_bits(new_mask); |
1da177e4 LT |
579 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
580 | } | |
581 | ||
582 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
583 | unsigned int len, | |
584 | compat_ulong_t __user *user_mask_ptr) | |
585 | { | |
a45185d2 | 586 | cpumask_var_t new_mask; |
1da177e4 LT |
587 | int retval; |
588 | ||
a45185d2 RR |
589 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
590 | return -ENOMEM; | |
591 | ||
592 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); | |
1da177e4 | 593 | if (retval) |
a45185d2 | 594 | goto out; |
1da177e4 | 595 | |
a45185d2 RR |
596 | retval = sched_setaffinity(pid, new_mask); |
597 | out: | |
598 | free_cpumask_var(new_mask); | |
599 | return retval; | |
1da177e4 LT |
600 | } |
601 | ||
602 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, | |
603 | compat_ulong_t __user *user_mask_ptr) | |
604 | { | |
605 | int ret; | |
a45185d2 | 606 | cpumask_var_t mask; |
1da177e4 | 607 | |
fa9dc265 KM |
608 | if ((len * BITS_PER_BYTE) < nr_cpu_ids) |
609 | return -EINVAL; | |
610 | if (len & (sizeof(compat_ulong_t)-1)) | |
1da177e4 LT |
611 | return -EINVAL; |
612 | ||
a45185d2 RR |
613 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
614 | return -ENOMEM; | |
615 | ||
616 | ret = sched_getaffinity(pid, mask); | |
fa9dc265 KM |
617 | if (ret == 0) { |
618 | size_t retlen = min_t(size_t, len, cpumask_size()); | |
1da177e4 | 619 | |
fa9dc265 KM |
620 | if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) |
621 | ret = -EFAULT; | |
622 | else | |
623 | ret = retlen; | |
624 | } | |
a45185d2 | 625 | free_cpumask_var(mask); |
fa9dc265 | 626 | |
a45185d2 | 627 | return ret; |
1da177e4 LT |
628 | } |
629 | ||
83f5d126 DL |
630 | int get_compat_itimerspec(struct itimerspec *dst, |
631 | const struct compat_itimerspec __user *src) | |
bd3a8492 | 632 | { |
1da177e4 LT |
633 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
634 | get_compat_timespec(&dst->it_value, &src->it_value)) | |
635 | return -EFAULT; | |
636 | return 0; | |
bd3a8492 | 637 | } |
1da177e4 | 638 | |
83f5d126 DL |
639 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
640 | const struct itimerspec *src) | |
bd3a8492 | 641 | { |
1da177e4 LT |
642 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
643 | put_compat_timespec(&src->it_value, &dst->it_value)) | |
644 | return -EFAULT; | |
645 | return 0; | |
bd3a8492 | 646 | } |
1da177e4 | 647 | |
3a0f69d5 CH |
648 | long compat_sys_timer_create(clockid_t which_clock, |
649 | struct compat_sigevent __user *timer_event_spec, | |
650 | timer_t __user *created_timer_id) | |
651 | { | |
652 | struct sigevent __user *event = NULL; | |
653 | ||
654 | if (timer_event_spec) { | |
655 | struct sigevent kevent; | |
656 | ||
657 | event = compat_alloc_user_space(sizeof(*event)); | |
658 | if (get_compat_sigevent(&kevent, timer_event_spec) || | |
659 | copy_to_user(event, &kevent, sizeof(*event))) | |
660 | return -EFAULT; | |
661 | } | |
662 | ||
663 | return sys_timer_create(which_clock, event, created_timer_id); | |
664 | } | |
665 | ||
1da177e4 | 666 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
bd3a8492 | 667 | struct compat_itimerspec __user *new, |
1da177e4 | 668 | struct compat_itimerspec __user *old) |
bd3a8492 | 669 | { |
1da177e4 LT |
670 | long err; |
671 | mm_segment_t oldfs; | |
672 | struct itimerspec newts, oldts; | |
673 | ||
674 | if (!new) | |
675 | return -EINVAL; | |
676 | if (get_compat_itimerspec(&newts, new)) | |
bd3a8492 | 677 | return -EFAULT; |
1da177e4 LT |
678 | oldfs = get_fs(); |
679 | set_fs(KERNEL_DS); | |
680 | err = sys_timer_settime(timer_id, flags, | |
681 | (struct itimerspec __user *) &newts, | |
682 | (struct itimerspec __user *) &oldts); | |
bd3a8492 | 683 | set_fs(oldfs); |
1da177e4 LT |
684 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
685 | return -EFAULT; | |
686 | return err; | |
bd3a8492 | 687 | } |
1da177e4 LT |
688 | |
689 | long compat_sys_timer_gettime(timer_t timer_id, | |
690 | struct compat_itimerspec __user *setting) | |
bd3a8492 | 691 | { |
1da177e4 LT |
692 | long err; |
693 | mm_segment_t oldfs; | |
bd3a8492 | 694 | struct itimerspec ts; |
1da177e4 LT |
695 | |
696 | oldfs = get_fs(); | |
697 | set_fs(KERNEL_DS); | |
698 | err = sys_timer_gettime(timer_id, | |
bd3a8492 DW |
699 | (struct itimerspec __user *) &ts); |
700 | set_fs(oldfs); | |
1da177e4 LT |
701 | if (!err && put_compat_itimerspec(setting, &ts)) |
702 | return -EFAULT; | |
703 | return err; | |
bd3a8492 | 704 | } |
1da177e4 LT |
705 | |
706 | long compat_sys_clock_settime(clockid_t which_clock, | |
707 | struct compat_timespec __user *tp) | |
708 | { | |
709 | long err; | |
710 | mm_segment_t oldfs; | |
bd3a8492 | 711 | struct timespec ts; |
1da177e4 LT |
712 | |
713 | if (get_compat_timespec(&ts, tp)) | |
bd3a8492 | 714 | return -EFAULT; |
1da177e4 | 715 | oldfs = get_fs(); |
bd3a8492 | 716 | set_fs(KERNEL_DS); |
1da177e4 LT |
717 | err = sys_clock_settime(which_clock, |
718 | (struct timespec __user *) &ts); | |
719 | set_fs(oldfs); | |
720 | return err; | |
bd3a8492 | 721 | } |
1da177e4 LT |
722 | |
723 | long compat_sys_clock_gettime(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 LT |
729 | |
730 | oldfs = get_fs(); | |
731 | set_fs(KERNEL_DS); | |
732 | err = sys_clock_gettime(which_clock, | |
733 | (struct timespec __user *) &ts); | |
734 | set_fs(oldfs); | |
735 | if (!err && put_compat_timespec(&ts, tp)) | |
bd3a8492 | 736 | return -EFAULT; |
1da177e4 | 737 | return err; |
bd3a8492 | 738 | } |
1da177e4 | 739 | |
f1f1d5eb RC |
740 | long compat_sys_clock_adjtime(clockid_t which_clock, |
741 | struct compat_timex __user *utp) | |
742 | { | |
743 | struct timex txc; | |
744 | mm_segment_t oldfs; | |
745 | int err, ret; | |
746 | ||
747 | err = compat_get_timex(&txc, utp); | |
748 | if (err) | |
749 | return err; | |
750 | ||
751 | oldfs = get_fs(); | |
752 | set_fs(KERNEL_DS); | |
753 | ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); | |
754 | set_fs(oldfs); | |
755 | ||
756 | err = compat_put_timex(utp, &txc); | |
757 | if (err) | |
758 | return err; | |
759 | ||
760 | return ret; | |
761 | } | |
762 | ||
1da177e4 LT |
763 | long compat_sys_clock_getres(clockid_t which_clock, |
764 | struct compat_timespec __user *tp) | |
765 | { | |
766 | long err; | |
767 | mm_segment_t oldfs; | |
bd3a8492 | 768 | struct timespec ts; |
1da177e4 LT |
769 | |
770 | oldfs = get_fs(); | |
771 | set_fs(KERNEL_DS); | |
772 | err = sys_clock_getres(which_clock, | |
773 | (struct timespec __user *) &ts); | |
774 | set_fs(oldfs); | |
775 | if (!err && tp && put_compat_timespec(&ts, tp)) | |
bd3a8492 | 776 | return -EFAULT; |
1da177e4 | 777 | return err; |
bd3a8492 | 778 | } |
1da177e4 | 779 | |
1711ef38 TA |
780 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
781 | { | |
782 | long err; | |
783 | mm_segment_t oldfs; | |
784 | struct timespec tu; | |
029a07e0 | 785 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
1711ef38 | 786 | |
029a07e0 | 787 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
1711ef38 TA |
788 | oldfs = get_fs(); |
789 | set_fs(KERNEL_DS); | |
790 | err = clock_nanosleep_restart(restart); | |
791 | set_fs(oldfs); | |
792 | ||
793 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && | |
794 | put_compat_timespec(&tu, rmtp)) | |
795 | return -EFAULT; | |
796 | ||
797 | if (err == -ERESTART_RESTARTBLOCK) { | |
798 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 799 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 TA |
800 | } |
801 | return err; | |
802 | } | |
803 | ||
1da177e4 LT |
804 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
805 | struct compat_timespec __user *rqtp, | |
806 | struct compat_timespec __user *rmtp) | |
807 | { | |
808 | long err; | |
809 | mm_segment_t oldfs; | |
bd3a8492 | 810 | struct timespec in, out; |
1711ef38 | 811 | struct restart_block *restart; |
1da177e4 | 812 | |
bd3a8492 | 813 | if (get_compat_timespec(&in, rqtp)) |
1da177e4 LT |
814 | return -EFAULT; |
815 | ||
816 | oldfs = get_fs(); | |
817 | set_fs(KERNEL_DS); | |
818 | err = sys_clock_nanosleep(which_clock, flags, | |
819 | (struct timespec __user *) &in, | |
820 | (struct timespec __user *) &out); | |
821 | set_fs(oldfs); | |
1711ef38 | 822 | |
1da177e4 LT |
823 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
824 | put_compat_timespec(&out, rmtp)) | |
825 | return -EFAULT; | |
1711ef38 TA |
826 | |
827 | if (err == -ERESTART_RESTARTBLOCK) { | |
828 | restart = ¤t_thread_info()->restart_block; | |
829 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 830 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 | 831 | } |
bd3a8492 DW |
832 | return err; |
833 | } | |
1da177e4 LT |
834 | |
835 | /* | |
836 | * We currently only need the following fields from the sigevent | |
837 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes | |
838 | * sigev_notify_thread_id). The others are handled in user mode. | |
839 | * We also assume that copying sigev_value.sival_int is sufficient | |
840 | * to keep all the bits of sigev_value.sival_ptr intact. | |
841 | */ | |
842 | int get_compat_sigevent(struct sigevent *event, | |
843 | const struct compat_sigevent __user *u_event) | |
844 | { | |
51410d3c | 845 | memset(event, 0, sizeof(*event)); |
1da177e4 LT |
846 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
847 | __get_user(event->sigev_value.sival_int, | |
848 | &u_event->sigev_value.sival_int) || | |
849 | __get_user(event->sigev_signo, &u_event->sigev_signo) || | |
850 | __get_user(event->sigev_notify, &u_event->sigev_notify) || | |
851 | __get_user(event->sigev_notify_thread_id, | |
852 | &u_event->sigev_notify_thread_id)) | |
853 | ? -EFAULT : 0; | |
854 | } | |
855 | ||
5fa3839a | 856 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4 LT |
857 | unsigned long bitmap_size) |
858 | { | |
859 | int i, j; | |
860 | unsigned long m; | |
861 | compat_ulong_t um; | |
862 | unsigned long nr_compat_longs; | |
863 | ||
864 | /* align bitmap up to nearest compat_long_t boundary */ | |
865 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
866 | ||
867 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) | |
868 | return -EFAULT; | |
869 | ||
870 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
871 | ||
872 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
873 | m = 0; | |
874 | ||
875 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
876 | /* | |
877 | * We dont want to read past the end of the userspace | |
878 | * bitmap. We must however ensure the end of the | |
879 | * kernel bitmap is zeroed. | |
880 | */ | |
881 | if (nr_compat_longs-- > 0) { | |
882 | if (__get_user(um, umask)) | |
883 | return -EFAULT; | |
884 | } else { | |
885 | um = 0; | |
886 | } | |
887 | ||
888 | umask++; | |
889 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); | |
890 | } | |
891 | *mask++ = m; | |
892 | } | |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
898 | unsigned long bitmap_size) | |
899 | { | |
900 | int i, j; | |
901 | unsigned long m; | |
902 | compat_ulong_t um; | |
903 | unsigned long nr_compat_longs; | |
904 | ||
905 | /* align bitmap up to nearest compat_long_t boundary */ | |
906 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
907 | ||
908 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) | |
909 | return -EFAULT; | |
910 | ||
911 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
912 | ||
913 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
914 | m = *mask++; | |
915 | ||
916 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
917 | um = m; | |
918 | ||
919 | /* | |
920 | * We dont want to write past the end of the userspace | |
921 | * bitmap. | |
922 | */ | |
923 | if (nr_compat_longs-- > 0) { | |
924 | if (__put_user(um, umask)) | |
925 | return -EFAULT; | |
926 | } | |
927 | ||
928 | umask++; | |
929 | m >>= 4*sizeof(um); | |
930 | m >>= 4*sizeof(um); | |
931 | } | |
932 | } | |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | void | |
938 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) | |
939 | { | |
940 | switch (_NSIG_WORDS) { | |
1da177e4 LT |
941 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
942 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); | |
943 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); | |
944 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); | |
1da177e4 LT |
945 | } |
946 | } | |
1dda606c | 947 | EXPORT_SYMBOL_GPL(sigset_from_compat); |
1da177e4 LT |
948 | |
949 | asmlinkage long | |
950 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, | |
951 | struct compat_siginfo __user *uinfo, | |
952 | struct compat_timespec __user *uts, compat_size_t sigsetsize) | |
953 | { | |
954 | compat_sigset_t s32; | |
955 | sigset_t s; | |
1da177e4 LT |
956 | struct timespec t; |
957 | siginfo_t info; | |
943df148 | 958 | long ret; |
1da177e4 LT |
959 | |
960 | if (sigsetsize != sizeof(sigset_t)) | |
961 | return -EINVAL; | |
962 | ||
963 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) | |
964 | return -EFAULT; | |
965 | sigset_from_compat(&s, &s32); | |
1da177e4 LT |
966 | |
967 | if (uts) { | |
943df148 | 968 | if (get_compat_timespec(&t, uts)) |
1da177e4 | 969 | return -EFAULT; |
1da177e4 LT |
970 | } |
971 | ||
943df148 | 972 | ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
1da177e4 | 973 | |
943df148 ON |
974 | if (ret > 0 && uinfo) { |
975 | if (copy_siginfo_to_user32(uinfo, &info)) | |
976 | ret = -EFAULT; | |
1da177e4 | 977 | } |
943df148 | 978 | |
1da177e4 LT |
979 | return ret; |
980 | ||
981 | } | |
982 | ||
62ab4505 TG |
983 | asmlinkage long |
984 | compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, | |
985 | struct compat_siginfo __user *uinfo) | |
986 | { | |
987 | siginfo_t info; | |
988 | ||
989 | if (copy_siginfo_from_user32(&info, uinfo)) | |
990 | return -EFAULT; | |
991 | return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); | |
992 | } | |
993 | ||
1da177e4 LT |
994 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
995 | ||
996 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ | |
997 | ||
998 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) | |
999 | { | |
1000 | compat_time_t i; | |
1001 | struct timeval tv; | |
1002 | ||
1003 | do_gettimeofday(&tv); | |
1004 | i = tv.tv_sec; | |
1005 | ||
1006 | if (tloc) { | |
1007 | if (put_user(i,tloc)) | |
e3d5a27d | 1008 | return -EFAULT; |
1da177e4 | 1009 | } |
e3d5a27d | 1010 | force_successful_syscall_return(); |
1da177e4 LT |
1011 | return i; |
1012 | } | |
1013 | ||
1014 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) | |
1015 | { | |
1016 | struct timespec tv; | |
1017 | int err; | |
1018 | ||
1019 | if (get_user(tv.tv_sec, tptr)) | |
1020 | return -EFAULT; | |
1021 | ||
1022 | tv.tv_nsec = 0; | |
1023 | ||
1024 | err = security_settime(&tv, NULL); | |
1025 | if (err) | |
1026 | return err; | |
1027 | ||
1028 | do_settimeofday(&tv); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ | |
150256d8 DW |
1033 | |
1034 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND | |
1035 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) | |
1036 | { | |
1037 | sigset_t newset; | |
1038 | compat_sigset_t newset32; | |
1039 | ||
1040 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
1041 | if (sigsetsize != sizeof(sigset_t)) | |
1042 | return -EINVAL; | |
1043 | ||
1044 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) | |
1045 | return -EFAULT; | |
1046 | sigset_from_compat(&newset, &newset32); | |
1047 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1048 | ||
150256d8 | 1049 | current->saved_sigmask = current->blocked; |
c1095c6d | 1050 | set_current_blocked(&newset); |
150256d8 DW |
1051 | |
1052 | current->state = TASK_INTERRUPTIBLE; | |
1053 | schedule(); | |
4e4c22c7 | 1054 | set_restore_sigmask(); |
150256d8 DW |
1055 | return -ERESTARTNOHAND; |
1056 | } | |
1057 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ | |
3158e941 SR |
1058 | |
1059 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) | |
1060 | { | |
1061 | struct timex txc; | |
65f5d80b | 1062 | int err, ret; |
3158e941 | 1063 | |
65f5d80b RC |
1064 | err = compat_get_timex(&txc, utp); |
1065 | if (err) | |
1066 | return err; | |
3158e941 SR |
1067 | |
1068 | ret = do_adjtimex(&txc); | |
1069 | ||
65f5d80b RC |
1070 | err = compat_put_timex(utp, &txc); |
1071 | if (err) | |
1072 | return err; | |
3158e941 SR |
1073 | |
1074 | return ret; | |
1075 | } | |
1b2db9fb CL |
1076 | |
1077 | #ifdef CONFIG_NUMA | |
1078 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, | |
9216dfad | 1079 | compat_uptr_t __user *pages32, |
1b2db9fb CL |
1080 | const int __user *nodes, |
1081 | int __user *status, | |
1082 | int flags) | |
1083 | { | |
1084 | const void __user * __user *pages; | |
1085 | int i; | |
1086 | ||
1087 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); | |
1088 | for (i = 0; i < nr_pages; i++) { | |
1089 | compat_uptr_t p; | |
1090 | ||
9216dfad | 1091 | if (get_user(p, pages32 + i) || |
1b2db9fb CL |
1092 | put_user(compat_ptr(p), pages + i)) |
1093 | return -EFAULT; | |
1094 | } | |
1095 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); | |
1096 | } | |
3fd59397 SR |
1097 | |
1098 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, | |
1099 | compat_ulong_t maxnode, | |
1100 | const compat_ulong_t __user *old_nodes, | |
1101 | const compat_ulong_t __user *new_nodes) | |
1102 | { | |
1103 | unsigned long __user *old = NULL; | |
1104 | unsigned long __user *new = NULL; | |
1105 | nodemask_t tmp_mask; | |
1106 | unsigned long nr_bits; | |
1107 | unsigned long size; | |
1108 | ||
1109 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); | |
1110 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; | |
1111 | if (old_nodes) { | |
1112 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) | |
1113 | return -EFAULT; | |
1114 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); | |
1115 | if (new_nodes) | |
1116 | new = old + size / sizeof(unsigned long); | |
1117 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) | |
1118 | return -EFAULT; | |
1119 | } | |
1120 | if (new_nodes) { | |
1121 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) | |
1122 | return -EFAULT; | |
1123 | if (new == NULL) | |
1124 | new = compat_alloc_user_space(size); | |
1125 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) | |
1126 | return -EFAULT; | |
1127 | } | |
1128 | return sys_migrate_pages(pid, nr_bits + 1, old, new); | |
1129 | } | |
1b2db9fb | 1130 | #endif |
d4d23add KM |
1131 | |
1132 | struct compat_sysinfo { | |
1133 | s32 uptime; | |
1134 | u32 loads[3]; | |
1135 | u32 totalram; | |
1136 | u32 freeram; | |
1137 | u32 sharedram; | |
1138 | u32 bufferram; | |
1139 | u32 totalswap; | |
1140 | u32 freeswap; | |
1141 | u16 procs; | |
1142 | u16 pad; | |
1143 | u32 totalhigh; | |
1144 | u32 freehigh; | |
1145 | u32 mem_unit; | |
1146 | char _f[20-2*sizeof(u32)-sizeof(int)]; | |
1147 | }; | |
1148 | ||
1149 | asmlinkage long | |
1150 | compat_sys_sysinfo(struct compat_sysinfo __user *info) | |
1151 | { | |
1152 | struct sysinfo s; | |
1153 | ||
1154 | do_sysinfo(&s); | |
1155 | ||
1156 | /* Check to see if any memory value is too large for 32-bit and scale | |
1157 | * down if needed | |
1158 | */ | |
1159 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
1160 | int bitcount = 0; | |
1161 | ||
1162 | while (s.mem_unit < PAGE_SIZE) { | |
1163 | s.mem_unit <<= 1; | |
1164 | bitcount++; | |
1165 | } | |
1166 | ||
1167 | s.totalram >>= bitcount; | |
1168 | s.freeram >>= bitcount; | |
1169 | s.sharedram >>= bitcount; | |
1170 | s.bufferram >>= bitcount; | |
1171 | s.totalswap >>= bitcount; | |
1172 | s.freeswap >>= bitcount; | |
1173 | s.totalhigh >>= bitcount; | |
1174 | s.freehigh >>= bitcount; | |
1175 | } | |
1176 | ||
1177 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || | |
1178 | __put_user (s.uptime, &info->uptime) || | |
1179 | __put_user (s.loads[0], &info->loads[0]) || | |
1180 | __put_user (s.loads[1], &info->loads[1]) || | |
1181 | __put_user (s.loads[2], &info->loads[2]) || | |
1182 | __put_user (s.totalram, &info->totalram) || | |
1183 | __put_user (s.freeram, &info->freeram) || | |
1184 | __put_user (s.sharedram, &info->sharedram) || | |
1185 | __put_user (s.bufferram, &info->bufferram) || | |
1186 | __put_user (s.totalswap, &info->totalswap) || | |
1187 | __put_user (s.freeswap, &info->freeswap) || | |
1188 | __put_user (s.procs, &info->procs) || | |
1189 | __put_user (s.totalhigh, &info->totalhigh) || | |
1190 | __put_user (s.freehigh, &info->freehigh) || | |
1191 | __put_user (s.mem_unit, &info->mem_unit)) | |
1192 | return -EFAULT; | |
1193 | ||
1194 | return 0; | |
1195 | } | |
c41d68a5 PA |
1196 | |
1197 | /* | |
1198 | * Allocate user-space memory for the duration of a single system call, | |
1199 | * in order to marshall parameters inside a compat thunk. | |
1200 | */ | |
1201 | void __user *compat_alloc_user_space(unsigned long len) | |
1202 | { | |
1203 | void __user *ptr; | |
1204 | ||
1205 | /* If len would occupy more than half of the entire compat space... */ | |
1206 | if (unlikely(len > (((compat_uptr_t)~0) >> 1))) | |
1207 | return NULL; | |
1208 | ||
1209 | ptr = arch_compat_alloc_user_space(len); | |
1210 | ||
1211 | if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) | |
1212 | return NULL; | |
1213 | ||
1214 | return ptr; | |
1215 | } | |
1216 | EXPORT_SYMBOL_GPL(compat_alloc_user_space); |