2 * linux/kernel/compat.c
4 * Kernel compatibililty routines for e.g. 32 bit syscall support
7 * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
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.
14 #include <linux/linkage.h>
15 #include <linux/compat.h>
16 #include <linux/errno.h>
17 #include <linux/time.h>
18 #include <linux/signal.h>
19 #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */
20 #include <linux/syscalls.h>
21 #include <linux/unistd.h>
22 #include <linux/security.h>
23 #include <linux/timex.h>
24 #include <linux/migrate.h>
25 #include <linux/posix-timers.h>
26 #include <linux/times.h>
27 #include <linux/ptrace.h>
28 #include <linux/gfp.h>
30 #include <asm/uaccess.h>
33 * Note that the native side is already converted to a timespec, because
34 * that's what we want anyway.
36 static int compat_get_timeval(struct timespec *o,
37 struct compat_timeval __user *i)
41 if (get_user(o->tv_sec, &i->tv_sec) ||
42 get_user(usec, &i->tv_usec))
44 o->tv_nsec = usec * 1000;
48 static int compat_put_timeval(struct compat_timeval __user *o,
51 return (put_user(i->tv_sec, &o->tv_sec) ||
52 put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0;
55 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
56 struct timezone __user *tz)
60 do_gettimeofday(&ktv);
61 if (compat_put_timeval(tv, &ktv))
65 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
72 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
73 struct timezone __user *tz)
79 if (compat_get_timeval(&kts, tv))
83 if (copy_from_user(&ktz, tz, sizeof(ktz)))
87 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
90 int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
92 return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
93 __get_user(ts->tv_sec, &cts->tv_sec) ||
94 __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
97 int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
99 return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) ||
100 __put_user(ts->tv_sec, &cts->tv_sec) ||
101 __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
104 static long compat_nanosleep_restart(struct restart_block *restart)
106 struct compat_timespec __user *rmtp;
111 restart->nanosleep.rmtp = (struct timespec __user *) &rmt;
114 ret = hrtimer_nanosleep_restart(restart);
118 rmtp = restart->nanosleep.compat_rmtp;
120 if (rmtp && put_compat_timespec(&rmt, rmtp))
127 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
128 struct compat_timespec __user *rmtp)
130 struct timespec tu, rmt;
134 if (get_compat_timespec(&tu, rqtp))
137 if (!timespec_valid(&tu))
142 ret = hrtimer_nanosleep(&tu,
143 rmtp ? (struct timespec __user *)&rmt : NULL,
144 HRTIMER_MODE_REL, CLOCK_MONOTONIC);
148 struct restart_block *restart
149 = ¤t_thread_info()->restart_block;
151 restart->fn = compat_nanosleep_restart;
152 restart->nanosleep.compat_rmtp = rmtp;
154 if (rmtp && put_compat_timespec(&rmt, rmtp))
161 static inline long get_compat_itimerval(struct itimerval *o,
162 struct compat_itimerval __user *i)
164 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
165 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
166 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
167 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
168 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
171 static inline long put_compat_itimerval(struct compat_itimerval __user *o,
174 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
175 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
176 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
177 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
178 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
181 asmlinkage long compat_sys_getitimer(int which,
182 struct compat_itimerval __user *it)
184 struct itimerval kit;
187 error = do_getitimer(which, &kit);
188 if (!error && put_compat_itimerval(it, &kit))
193 asmlinkage long compat_sys_setitimer(int which,
194 struct compat_itimerval __user *in,
195 struct compat_itimerval __user *out)
197 struct itimerval kin, kout;
201 if (get_compat_itimerval(&kin, in))
204 memset(&kin, 0, sizeof(kin));
206 error = do_setitimer(which, &kin, out ? &kout : NULL);
209 if (put_compat_itimerval(out, &kout))
214 static compat_clock_t clock_t_to_compat_clock_t(clock_t x)
216 return compat_jiffies_to_clock_t(clock_t_to_jiffies(x));
219 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
223 struct compat_tms tmp;
226 /* Convert our struct tms to the compat version. */
227 tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime);
228 tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime);
229 tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime);
230 tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime);
231 if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
234 force_successful_syscall_return();
235 return compat_jiffies_to_clock_t(jiffies);
239 * Assumption: old_sigset_t and compat_old_sigset_t are both
240 * types that can be passed to put_user()/get_user().
243 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
247 mm_segment_t old_fs = get_fs();
250 ret = sys_sigpending((old_sigset_t __user *) &s);
253 ret = put_user(s, set);
257 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set,
258 compat_old_sigset_t __user *oset)
264 if (set && get_user(s, set))
268 ret = sys_sigprocmask(how,
269 set ? (old_sigset_t __user *) &s : NULL,
270 oset ? (old_sigset_t __user *) &s : NULL);
274 ret = put_user(s, oset);
278 asmlinkage long compat_sys_setrlimit(unsigned int resource,
279 struct compat_rlimit __user *rlim)
283 if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
284 __get_user(r.rlim_cur, &rlim->rlim_cur) ||
285 __get_user(r.rlim_max, &rlim->rlim_max))
288 if (r.rlim_cur == COMPAT_RLIM_INFINITY)
289 r.rlim_cur = RLIM_INFINITY;
290 if (r.rlim_max == COMPAT_RLIM_INFINITY)
291 r.rlim_max = RLIM_INFINITY;
292 return do_prlimit(current, resource, &r, NULL);
295 #ifdef COMPAT_RLIM_OLD_INFINITY
297 asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
298 struct compat_rlimit __user *rlim)
302 mm_segment_t old_fs = get_fs();
305 ret = sys_old_getrlimit(resource, &r);
309 if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
310 r.rlim_cur = COMPAT_RLIM_INFINITY;
311 if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
312 r.rlim_max = COMPAT_RLIM_INFINITY;
314 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
315 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
316 __put_user(r.rlim_max, &rlim->rlim_max))
324 asmlinkage long compat_sys_getrlimit(unsigned int resource,
325 struct compat_rlimit __user *rlim)
330 ret = do_prlimit(current, resource, NULL, &r);
332 if (r.rlim_cur > COMPAT_RLIM_INFINITY)
333 r.rlim_cur = COMPAT_RLIM_INFINITY;
334 if (r.rlim_max > COMPAT_RLIM_INFINITY)
335 r.rlim_max = COMPAT_RLIM_INFINITY;
337 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
338 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
339 __put_user(r.rlim_max, &rlim->rlim_max))
345 int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
347 if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
348 __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
349 __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
350 __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
351 __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
352 __put_user(r->ru_maxrss, &ru->ru_maxrss) ||
353 __put_user(r->ru_ixrss, &ru->ru_ixrss) ||
354 __put_user(r->ru_idrss, &ru->ru_idrss) ||
355 __put_user(r->ru_isrss, &ru->ru_isrss) ||
356 __put_user(r->ru_minflt, &ru->ru_minflt) ||
357 __put_user(r->ru_majflt, &ru->ru_majflt) ||
358 __put_user(r->ru_nswap, &ru->ru_nswap) ||
359 __put_user(r->ru_inblock, &ru->ru_inblock) ||
360 __put_user(r->ru_oublock, &ru->ru_oublock) ||
361 __put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
362 __put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
363 __put_user(r->ru_nsignals, &ru->ru_nsignals) ||
364 __put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
365 __put_user(r->ru_nivcsw, &ru->ru_nivcsw))
370 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
374 mm_segment_t old_fs = get_fs();
377 ret = sys_getrusage(who, (struct rusage __user *) &r);
383 if (put_compat_rusage(&r, ru))
390 compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
391 struct compat_rusage __user *ru)
394 return sys_wait4(pid, stat_addr, options, NULL);
399 mm_segment_t old_fs = get_fs();
404 (unsigned int __user *) &status : NULL),
405 options, (struct rusage __user *) &r);
409 if (put_compat_rusage(&r, ru))
411 if (stat_addr && put_user(status, stat_addr))
418 asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
419 struct compat_siginfo __user *uinfo, int options,
420 struct compat_rusage __user *uru)
425 mm_segment_t old_fs = get_fs();
427 memset(&info, 0, sizeof(info));
430 ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
431 uru ? (struct rusage __user *)&ru : NULL);
434 if ((ret < 0) || (info.si_signo == 0))
438 ret = put_compat_rusage(&ru, uru);
443 BUG_ON(info.si_code & __SI_MASK);
444 info.si_code |= __SI_CHLD;
445 return copy_siginfo_to_user32(uinfo, &info);
448 static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
449 unsigned len, struct cpumask *new_mask)
453 if (len < cpumask_size())
454 memset(new_mask, 0, cpumask_size());
455 else if (len > cpumask_size())
456 len = cpumask_size();
458 k = cpumask_bits(new_mask);
459 return compat_get_bitmap(k, user_mask_ptr, len * 8);
462 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
464 compat_ulong_t __user *user_mask_ptr)
466 cpumask_var_t new_mask;
469 if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
472 retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
476 retval = sched_setaffinity(pid, new_mask);
478 free_cpumask_var(new_mask);
482 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
483 compat_ulong_t __user *user_mask_ptr)
488 if ((len * BITS_PER_BYTE) < nr_cpu_ids)
490 if (len & (sizeof(compat_ulong_t)-1))
493 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
496 ret = sched_getaffinity(pid, mask);
498 size_t retlen = min_t(size_t, len, cpumask_size());
500 if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8))
505 free_cpumask_var(mask);
510 int get_compat_itimerspec(struct itimerspec *dst,
511 const struct compat_itimerspec __user *src)
513 if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
514 get_compat_timespec(&dst->it_value, &src->it_value))
519 int put_compat_itimerspec(struct compat_itimerspec __user *dst,
520 const struct itimerspec *src)
522 if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
523 put_compat_timespec(&src->it_value, &dst->it_value))
528 long compat_sys_timer_create(clockid_t which_clock,
529 struct compat_sigevent __user *timer_event_spec,
530 timer_t __user *created_timer_id)
532 struct sigevent __user *event = NULL;
534 if (timer_event_spec) {
535 struct sigevent kevent;
537 event = compat_alloc_user_space(sizeof(*event));
538 if (get_compat_sigevent(&kevent, timer_event_spec) ||
539 copy_to_user(event, &kevent, sizeof(*event)))
543 return sys_timer_create(which_clock, event, created_timer_id);
546 long compat_sys_timer_settime(timer_t timer_id, int flags,
547 struct compat_itimerspec __user *new,
548 struct compat_itimerspec __user *old)
552 struct itimerspec newts, oldts;
556 if (get_compat_itimerspec(&newts, new))
560 err = sys_timer_settime(timer_id, flags,
561 (struct itimerspec __user *) &newts,
562 (struct itimerspec __user *) &oldts);
564 if (!err && old && put_compat_itimerspec(old, &oldts))
569 long compat_sys_timer_gettime(timer_t timer_id,
570 struct compat_itimerspec __user *setting)
574 struct itimerspec ts;
578 err = sys_timer_gettime(timer_id,
579 (struct itimerspec __user *) &ts);
581 if (!err && put_compat_itimerspec(setting, &ts))
586 long compat_sys_clock_settime(clockid_t which_clock,
587 struct compat_timespec __user *tp)
593 if (get_compat_timespec(&ts, tp))
597 err = sys_clock_settime(which_clock,
598 (struct timespec __user *) &ts);
603 long compat_sys_clock_gettime(clockid_t which_clock,
604 struct compat_timespec __user *tp)
612 err = sys_clock_gettime(which_clock,
613 (struct timespec __user *) &ts);
615 if (!err && put_compat_timespec(&ts, tp))
620 long compat_sys_clock_getres(clockid_t which_clock,
621 struct compat_timespec __user *tp)
629 err = sys_clock_getres(which_clock,
630 (struct timespec __user *) &ts);
632 if (!err && tp && put_compat_timespec(&ts, tp))
637 static long compat_clock_nanosleep_restart(struct restart_block *restart)
642 struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
644 restart->nanosleep.rmtp = (struct timespec __user *) &tu;
647 err = clock_nanosleep_restart(restart);
650 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
651 put_compat_timespec(&tu, rmtp))
654 if (err == -ERESTART_RESTARTBLOCK) {
655 restart->fn = compat_clock_nanosleep_restart;
656 restart->nanosleep.compat_rmtp = rmtp;
661 long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
662 struct compat_timespec __user *rqtp,
663 struct compat_timespec __user *rmtp)
667 struct timespec in, out;
668 struct restart_block *restart;
670 if (get_compat_timespec(&in, rqtp))
675 err = sys_clock_nanosleep(which_clock, flags,
676 (struct timespec __user *) &in,
677 (struct timespec __user *) &out);
680 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
681 put_compat_timespec(&out, rmtp))
684 if (err == -ERESTART_RESTARTBLOCK) {
685 restart = ¤t_thread_info()->restart_block;
686 restart->fn = compat_clock_nanosleep_restart;
687 restart->nanosleep.compat_rmtp = rmtp;
693 * We currently only need the following fields from the sigevent
694 * structure: sigev_value, sigev_signo, sig_notify and (sometimes
695 * sigev_notify_thread_id). The others are handled in user mode.
696 * We also assume that copying sigev_value.sival_int is sufficient
697 * to keep all the bits of sigev_value.sival_ptr intact.
699 int get_compat_sigevent(struct sigevent *event,
700 const struct compat_sigevent __user *u_event)
702 memset(event, 0, sizeof(*event));
703 return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) ||
704 __get_user(event->sigev_value.sival_int,
705 &u_event->sigev_value.sival_int) ||
706 __get_user(event->sigev_signo, &u_event->sigev_signo) ||
707 __get_user(event->sigev_notify, &u_event->sigev_notify) ||
708 __get_user(event->sigev_notify_thread_id,
709 &u_event->sigev_notify_thread_id))
713 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
714 unsigned long bitmap_size)
719 unsigned long nr_compat_longs;
721 /* align bitmap up to nearest compat_long_t boundary */
722 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
724 if (!access_ok(VERIFY_READ, umask, bitmap_size / 8))
727 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
729 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
732 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
734 * We dont want to read past the end of the userspace
735 * bitmap. We must however ensure the end of the
736 * kernel bitmap is zeroed.
738 if (nr_compat_longs-- > 0) {
739 if (__get_user(um, umask))
746 m |= (long)um << (j * BITS_PER_COMPAT_LONG);
754 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
755 unsigned long bitmap_size)
760 unsigned long nr_compat_longs;
762 /* align bitmap up to nearest compat_long_t boundary */
763 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
765 if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8))
768 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
770 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
773 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
777 * We dont want to write past the end of the userspace
780 if (nr_compat_longs-- > 0) {
781 if (__put_user(um, umask))
795 sigset_from_compat (sigset_t *set, compat_sigset_t *compat)
797 switch (_NSIG_WORDS) {
798 case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
799 case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
800 case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
801 case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
806 compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese,
807 struct compat_siginfo __user *uinfo,
808 struct compat_timespec __user *uts, compat_size_t sigsetsize)
815 long ret, timeout = 0;
817 if (sigsetsize != sizeof(sigset_t))
820 if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
822 sigset_from_compat(&s, &s32);
823 sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
827 if (get_compat_timespec (&t, uts))
829 if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
834 spin_lock_irq(¤t->sighand->siglock);
835 sig = dequeue_signal(current, &s, &info);
837 timeout = MAX_SCHEDULE_TIMEOUT;
839 timeout = timespec_to_jiffies(&t)
840 +(t.tv_sec || t.tv_nsec);
842 current->real_blocked = current->blocked;
843 sigandsets(¤t->blocked, ¤t->blocked, &s);
846 spin_unlock_irq(¤t->sighand->siglock);
848 timeout = schedule_timeout_interruptible(timeout);
850 spin_lock_irq(¤t->sighand->siglock);
851 sig = dequeue_signal(current, &s, &info);
852 current->blocked = current->real_blocked;
853 siginitset(¤t->real_blocked, 0);
857 spin_unlock_irq(¤t->sighand->siglock);
862 if (copy_siginfo_to_user32(uinfo, &info))
866 ret = timeout?-EINTR:-EAGAIN;
873 compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
874 struct compat_siginfo __user *uinfo)
878 if (copy_siginfo_from_user32(&info, uinfo))
880 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
883 #ifdef __ARCH_WANT_COMPAT_SYS_TIME
885 /* compat_time_t is a 32 bit "long" and needs to get converted. */
887 asmlinkage long compat_sys_time(compat_time_t __user * tloc)
892 do_gettimeofday(&tv);
896 if (put_user(i,tloc))
899 force_successful_syscall_return();
903 asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
908 if (get_user(tv.tv_sec, tptr))
913 err = security_settime(&tv, NULL);
917 do_settimeofday(&tv);
921 #endif /* __ARCH_WANT_COMPAT_SYS_TIME */
923 #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
924 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize)
927 compat_sigset_t newset32;
929 /* XXX: Don't preclude handling different sized sigset_t's. */
930 if (sigsetsize != sizeof(sigset_t))
933 if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
935 sigset_from_compat(&newset, &newset32);
936 sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
938 spin_lock_irq(¤t->sighand->siglock);
939 current->saved_sigmask = current->blocked;
940 current->blocked = newset;
942 spin_unlock_irq(¤t->sighand->siglock);
944 current->state = TASK_INTERRUPTIBLE;
946 set_restore_sigmask();
947 return -ERESTARTNOHAND;
949 #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */
951 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
956 memset(&txc, 0, sizeof(struct timex));
958 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
959 __get_user(txc.modes, &utp->modes) ||
960 __get_user(txc.offset, &utp->offset) ||
961 __get_user(txc.freq, &utp->freq) ||
962 __get_user(txc.maxerror, &utp->maxerror) ||
963 __get_user(txc.esterror, &utp->esterror) ||
964 __get_user(txc.status, &utp->status) ||
965 __get_user(txc.constant, &utp->constant) ||
966 __get_user(txc.precision, &utp->precision) ||
967 __get_user(txc.tolerance, &utp->tolerance) ||
968 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
969 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
970 __get_user(txc.tick, &utp->tick) ||
971 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
972 __get_user(txc.jitter, &utp->jitter) ||
973 __get_user(txc.shift, &utp->shift) ||
974 __get_user(txc.stabil, &utp->stabil) ||
975 __get_user(txc.jitcnt, &utp->jitcnt) ||
976 __get_user(txc.calcnt, &utp->calcnt) ||
977 __get_user(txc.errcnt, &utp->errcnt) ||
978 __get_user(txc.stbcnt, &utp->stbcnt))
981 ret = do_adjtimex(&txc);
983 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
984 __put_user(txc.modes, &utp->modes) ||
985 __put_user(txc.offset, &utp->offset) ||
986 __put_user(txc.freq, &utp->freq) ||
987 __put_user(txc.maxerror, &utp->maxerror) ||
988 __put_user(txc.esterror, &utp->esterror) ||
989 __put_user(txc.status, &utp->status) ||
990 __put_user(txc.constant, &utp->constant) ||
991 __put_user(txc.precision, &utp->precision) ||
992 __put_user(txc.tolerance, &utp->tolerance) ||
993 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
994 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
995 __put_user(txc.tick, &utp->tick) ||
996 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
997 __put_user(txc.jitter, &utp->jitter) ||
998 __put_user(txc.shift, &utp->shift) ||
999 __put_user(txc.stabil, &utp->stabil) ||
1000 __put_user(txc.jitcnt, &utp->jitcnt) ||
1001 __put_user(txc.calcnt, &utp->calcnt) ||
1002 __put_user(txc.errcnt, &utp->errcnt) ||
1003 __put_user(txc.stbcnt, &utp->stbcnt) ||
1004 __put_user(txc.tai, &utp->tai))
1011 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
1012 compat_uptr_t __user *pages32,
1013 const int __user *nodes,
1017 const void __user * __user *pages;
1020 pages = compat_alloc_user_space(nr_pages * sizeof(void *));
1021 for (i = 0; i < nr_pages; i++) {
1024 if (get_user(p, pages32 + i) ||
1025 put_user(compat_ptr(p), pages + i))
1028 return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
1031 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
1032 compat_ulong_t maxnode,
1033 const compat_ulong_t __user *old_nodes,
1034 const compat_ulong_t __user *new_nodes)
1036 unsigned long __user *old = NULL;
1037 unsigned long __user *new = NULL;
1038 nodemask_t tmp_mask;
1039 unsigned long nr_bits;
1042 nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
1043 size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
1045 if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
1047 old = compat_alloc_user_space(new_nodes ? size * 2 : size);
1049 new = old + size / sizeof(unsigned long);
1050 if (copy_to_user(old, nodes_addr(tmp_mask), size))
1054 if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
1057 new = compat_alloc_user_space(size);
1058 if (copy_to_user(new, nodes_addr(tmp_mask), size))
1061 return sys_migrate_pages(pid, nr_bits + 1, old, new);
1065 struct compat_sysinfo {
1079 char _f[20-2*sizeof(u32)-sizeof(int)];
1083 compat_sys_sysinfo(struct compat_sysinfo __user *info)
1089 /* Check to see if any memory value is too large for 32-bit and scale
1092 if ((s.totalram >> 32) || (s.totalswap >> 32)) {
1095 while (s.mem_unit < PAGE_SIZE) {
1100 s.totalram >>= bitcount;
1101 s.freeram >>= bitcount;
1102 s.sharedram >>= bitcount;
1103 s.bufferram >>= bitcount;
1104 s.totalswap >>= bitcount;
1105 s.freeswap >>= bitcount;
1106 s.totalhigh >>= bitcount;
1107 s.freehigh >>= bitcount;
1110 if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
1111 __put_user (s.uptime, &info->uptime) ||
1112 __put_user (s.loads[0], &info->loads[0]) ||
1113 __put_user (s.loads[1], &info->loads[1]) ||
1114 __put_user (s.loads[2], &info->loads[2]) ||
1115 __put_user (s.totalram, &info->totalram) ||
1116 __put_user (s.freeram, &info->freeram) ||
1117 __put_user (s.sharedram, &info->sharedram) ||
1118 __put_user (s.bufferram, &info->bufferram) ||
1119 __put_user (s.totalswap, &info->totalswap) ||
1120 __put_user (s.freeswap, &info->freeswap) ||
1121 __put_user (s.procs, &info->procs) ||
1122 __put_user (s.totalhigh, &info->totalhigh) ||
1123 __put_user (s.freehigh, &info->freehigh) ||
1124 __put_user (s.mem_unit, &info->mem_unit))
1131 * Allocate user-space memory for the duration of a single system call,
1132 * in order to marshall parameters inside a compat thunk.
1134 void __user *compat_alloc_user_space(unsigned long len)
1138 /* If len would occupy more than half of the entire compat space... */
1139 if (unlikely(len > (((compat_uptr_t)~0) >> 1)))
1142 ptr = arch_compat_alloc_user_space(len);
1144 if (unlikely(!access_ok(VERIFY_WRITE, ptr, len)))
1149 EXPORT_SYMBOL_GPL(compat_alloc_user_space);