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 mm_segment_t old_fs = get_fs ();
285 if (resource >= RLIM_NLIMITS)
288 if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
289 __get_user(r.rlim_cur, &rlim->rlim_cur) ||
290 __get_user(r.rlim_max, &rlim->rlim_max))
293 if (r.rlim_cur == COMPAT_RLIM_INFINITY)
294 r.rlim_cur = RLIM_INFINITY;
295 if (r.rlim_max == COMPAT_RLIM_INFINITY)
296 r.rlim_max = RLIM_INFINITY;
298 ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
303 #ifdef COMPAT_RLIM_OLD_INFINITY
305 asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
306 struct compat_rlimit __user *rlim)
310 mm_segment_t old_fs = get_fs();
313 ret = sys_old_getrlimit(resource, &r);
317 if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
318 r.rlim_cur = COMPAT_RLIM_INFINITY;
319 if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
320 r.rlim_max = COMPAT_RLIM_INFINITY;
322 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
323 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
324 __put_user(r.rlim_max, &rlim->rlim_max))
332 asmlinkage long compat_sys_getrlimit (unsigned int resource,
333 struct compat_rlimit __user *rlim)
337 mm_segment_t old_fs = get_fs();
340 ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
343 if (r.rlim_cur > COMPAT_RLIM_INFINITY)
344 r.rlim_cur = COMPAT_RLIM_INFINITY;
345 if (r.rlim_max > COMPAT_RLIM_INFINITY)
346 r.rlim_max = COMPAT_RLIM_INFINITY;
348 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
349 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
350 __put_user(r.rlim_max, &rlim->rlim_max))
356 int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
358 if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
359 __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
360 __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
361 __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
362 __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
363 __put_user(r->ru_maxrss, &ru->ru_maxrss) ||
364 __put_user(r->ru_ixrss, &ru->ru_ixrss) ||
365 __put_user(r->ru_idrss, &ru->ru_idrss) ||
366 __put_user(r->ru_isrss, &ru->ru_isrss) ||
367 __put_user(r->ru_minflt, &ru->ru_minflt) ||
368 __put_user(r->ru_majflt, &ru->ru_majflt) ||
369 __put_user(r->ru_nswap, &ru->ru_nswap) ||
370 __put_user(r->ru_inblock, &ru->ru_inblock) ||
371 __put_user(r->ru_oublock, &ru->ru_oublock) ||
372 __put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
373 __put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
374 __put_user(r->ru_nsignals, &ru->ru_nsignals) ||
375 __put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
376 __put_user(r->ru_nivcsw, &ru->ru_nivcsw))
381 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
385 mm_segment_t old_fs = get_fs();
388 ret = sys_getrusage(who, (struct rusage __user *) &r);
394 if (put_compat_rusage(&r, ru))
401 compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
402 struct compat_rusage __user *ru)
405 return sys_wait4(pid, stat_addr, options, NULL);
410 mm_segment_t old_fs = get_fs();
415 (unsigned int __user *) &status : NULL),
416 options, (struct rusage __user *) &r);
420 if (put_compat_rusage(&r, ru))
422 if (stat_addr && put_user(status, stat_addr))
429 asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
430 struct compat_siginfo __user *uinfo, int options,
431 struct compat_rusage __user *uru)
436 mm_segment_t old_fs = get_fs();
438 memset(&info, 0, sizeof(info));
441 ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
442 uru ? (struct rusage __user *)&ru : NULL);
445 if ((ret < 0) || (info.si_signo == 0))
449 ret = put_compat_rusage(&ru, uru);
454 BUG_ON(info.si_code & __SI_MASK);
455 info.si_code |= __SI_CHLD;
456 return copy_siginfo_to_user32(uinfo, &info);
459 static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
460 unsigned len, struct cpumask *new_mask)
464 if (len < cpumask_size())
465 memset(new_mask, 0, cpumask_size());
466 else if (len > cpumask_size())
467 len = cpumask_size();
469 k = cpumask_bits(new_mask);
470 return compat_get_bitmap(k, user_mask_ptr, len * 8);
473 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
475 compat_ulong_t __user *user_mask_ptr)
477 cpumask_var_t new_mask;
480 if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
483 retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
487 retval = sched_setaffinity(pid, new_mask);
489 free_cpumask_var(new_mask);
493 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
494 compat_ulong_t __user *user_mask_ptr)
499 unsigned int min_length = cpumask_size();
501 if (nr_cpu_ids <= BITS_PER_COMPAT_LONG)
502 min_length = sizeof(compat_ulong_t);
504 if (len < min_length)
507 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
510 ret = sched_getaffinity(pid, mask);
514 k = cpumask_bits(mask);
515 ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
520 free_cpumask_var(mask);
524 int get_compat_itimerspec(struct itimerspec *dst,
525 const struct compat_itimerspec __user *src)
527 if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
528 get_compat_timespec(&dst->it_value, &src->it_value))
533 int put_compat_itimerspec(struct compat_itimerspec __user *dst,
534 const struct itimerspec *src)
536 if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
537 put_compat_timespec(&src->it_value, &dst->it_value))
542 long compat_sys_timer_create(clockid_t which_clock,
543 struct compat_sigevent __user *timer_event_spec,
544 timer_t __user *created_timer_id)
546 struct sigevent __user *event = NULL;
548 if (timer_event_spec) {
549 struct sigevent kevent;
551 event = compat_alloc_user_space(sizeof(*event));
552 if (get_compat_sigevent(&kevent, timer_event_spec) ||
553 copy_to_user(event, &kevent, sizeof(*event)))
557 return sys_timer_create(which_clock, event, created_timer_id);
560 long compat_sys_timer_settime(timer_t timer_id, int flags,
561 struct compat_itimerspec __user *new,
562 struct compat_itimerspec __user *old)
566 struct itimerspec newts, oldts;
570 if (get_compat_itimerspec(&newts, new))
574 err = sys_timer_settime(timer_id, flags,
575 (struct itimerspec __user *) &newts,
576 (struct itimerspec __user *) &oldts);
578 if (!err && old && put_compat_itimerspec(old, &oldts))
583 long compat_sys_timer_gettime(timer_t timer_id,
584 struct compat_itimerspec __user *setting)
588 struct itimerspec ts;
592 err = sys_timer_gettime(timer_id,
593 (struct itimerspec __user *) &ts);
595 if (!err && put_compat_itimerspec(setting, &ts))
600 long compat_sys_clock_settime(clockid_t which_clock,
601 struct compat_timespec __user *tp)
607 if (get_compat_timespec(&ts, tp))
611 err = sys_clock_settime(which_clock,
612 (struct timespec __user *) &ts);
617 long compat_sys_clock_gettime(clockid_t which_clock,
618 struct compat_timespec __user *tp)
626 err = sys_clock_gettime(which_clock,
627 (struct timespec __user *) &ts);
629 if (!err && put_compat_timespec(&ts, tp))
634 long compat_sys_clock_getres(clockid_t which_clock,
635 struct compat_timespec __user *tp)
643 err = sys_clock_getres(which_clock,
644 (struct timespec __user *) &ts);
646 if (!err && tp && put_compat_timespec(&ts, tp))
651 static long compat_clock_nanosleep_restart(struct restart_block *restart)
656 struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
658 restart->nanosleep.rmtp = (struct timespec __user *) &tu;
661 err = clock_nanosleep_restart(restart);
664 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
665 put_compat_timespec(&tu, rmtp))
668 if (err == -ERESTART_RESTARTBLOCK) {
669 restart->fn = compat_clock_nanosleep_restart;
670 restart->nanosleep.compat_rmtp = rmtp;
675 long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
676 struct compat_timespec __user *rqtp,
677 struct compat_timespec __user *rmtp)
681 struct timespec in, out;
682 struct restart_block *restart;
684 if (get_compat_timespec(&in, rqtp))
689 err = sys_clock_nanosleep(which_clock, flags,
690 (struct timespec __user *) &in,
691 (struct timespec __user *) &out);
694 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
695 put_compat_timespec(&out, rmtp))
698 if (err == -ERESTART_RESTARTBLOCK) {
699 restart = ¤t_thread_info()->restart_block;
700 restart->fn = compat_clock_nanosleep_restart;
701 restart->nanosleep.compat_rmtp = rmtp;
707 * We currently only need the following fields from the sigevent
708 * structure: sigev_value, sigev_signo, sig_notify and (sometimes
709 * sigev_notify_thread_id). The others are handled in user mode.
710 * We also assume that copying sigev_value.sival_int is sufficient
711 * to keep all the bits of sigev_value.sival_ptr intact.
713 int get_compat_sigevent(struct sigevent *event,
714 const struct compat_sigevent __user *u_event)
716 memset(event, 0, sizeof(*event));
717 return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) ||
718 __get_user(event->sigev_value.sival_int,
719 &u_event->sigev_value.sival_int) ||
720 __get_user(event->sigev_signo, &u_event->sigev_signo) ||
721 __get_user(event->sigev_notify, &u_event->sigev_notify) ||
722 __get_user(event->sigev_notify_thread_id,
723 &u_event->sigev_notify_thread_id))
727 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
728 unsigned long bitmap_size)
733 unsigned long nr_compat_longs;
735 /* align bitmap up to nearest compat_long_t boundary */
736 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
738 if (!access_ok(VERIFY_READ, umask, bitmap_size / 8))
741 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
743 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
746 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
748 * We dont want to read past the end of the userspace
749 * bitmap. We must however ensure the end of the
750 * kernel bitmap is zeroed.
752 if (nr_compat_longs-- > 0) {
753 if (__get_user(um, umask))
760 m |= (long)um << (j * BITS_PER_COMPAT_LONG);
768 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
769 unsigned long bitmap_size)
774 unsigned long nr_compat_longs;
776 /* align bitmap up to nearest compat_long_t boundary */
777 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
779 if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8))
782 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
784 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
787 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
791 * We dont want to write past the end of the userspace
794 if (nr_compat_longs-- > 0) {
795 if (__put_user(um, umask))
809 sigset_from_compat (sigset_t *set, compat_sigset_t *compat)
811 switch (_NSIG_WORDS) {
812 case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
813 case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
814 case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
815 case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
820 compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese,
821 struct compat_siginfo __user *uinfo,
822 struct compat_timespec __user *uts, compat_size_t sigsetsize)
829 long ret, timeout = 0;
831 if (sigsetsize != sizeof(sigset_t))
834 if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
836 sigset_from_compat(&s, &s32);
837 sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
841 if (get_compat_timespec (&t, uts))
843 if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
848 spin_lock_irq(¤t->sighand->siglock);
849 sig = dequeue_signal(current, &s, &info);
851 timeout = MAX_SCHEDULE_TIMEOUT;
853 timeout = timespec_to_jiffies(&t)
854 +(t.tv_sec || t.tv_nsec);
856 current->real_blocked = current->blocked;
857 sigandsets(¤t->blocked, ¤t->blocked, &s);
860 spin_unlock_irq(¤t->sighand->siglock);
862 timeout = schedule_timeout_interruptible(timeout);
864 spin_lock_irq(¤t->sighand->siglock);
865 sig = dequeue_signal(current, &s, &info);
866 current->blocked = current->real_blocked;
867 siginitset(¤t->real_blocked, 0);
871 spin_unlock_irq(¤t->sighand->siglock);
876 if (copy_siginfo_to_user32(uinfo, &info))
880 ret = timeout?-EINTR:-EAGAIN;
887 compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
888 struct compat_siginfo __user *uinfo)
892 if (copy_siginfo_from_user32(&info, uinfo))
894 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
897 #ifdef __ARCH_WANT_COMPAT_SYS_TIME
899 /* compat_time_t is a 32 bit "long" and needs to get converted. */
901 asmlinkage long compat_sys_time(compat_time_t __user * tloc)
906 do_gettimeofday(&tv);
910 if (put_user(i,tloc))
913 force_successful_syscall_return();
917 asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
922 if (get_user(tv.tv_sec, tptr))
927 err = security_settime(&tv, NULL);
931 do_settimeofday(&tv);
935 #endif /* __ARCH_WANT_COMPAT_SYS_TIME */
937 #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
938 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize)
941 compat_sigset_t newset32;
943 /* XXX: Don't preclude handling different sized sigset_t's. */
944 if (sigsetsize != sizeof(sigset_t))
947 if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
949 sigset_from_compat(&newset, &newset32);
950 sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
952 spin_lock_irq(¤t->sighand->siglock);
953 current->saved_sigmask = current->blocked;
954 current->blocked = newset;
956 spin_unlock_irq(¤t->sighand->siglock);
958 current->state = TASK_INTERRUPTIBLE;
960 set_restore_sigmask();
961 return -ERESTARTNOHAND;
963 #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */
965 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
970 memset(&txc, 0, sizeof(struct timex));
972 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
973 __get_user(txc.modes, &utp->modes) ||
974 __get_user(txc.offset, &utp->offset) ||
975 __get_user(txc.freq, &utp->freq) ||
976 __get_user(txc.maxerror, &utp->maxerror) ||
977 __get_user(txc.esterror, &utp->esterror) ||
978 __get_user(txc.status, &utp->status) ||
979 __get_user(txc.constant, &utp->constant) ||
980 __get_user(txc.precision, &utp->precision) ||
981 __get_user(txc.tolerance, &utp->tolerance) ||
982 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
983 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
984 __get_user(txc.tick, &utp->tick) ||
985 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
986 __get_user(txc.jitter, &utp->jitter) ||
987 __get_user(txc.shift, &utp->shift) ||
988 __get_user(txc.stabil, &utp->stabil) ||
989 __get_user(txc.jitcnt, &utp->jitcnt) ||
990 __get_user(txc.calcnt, &utp->calcnt) ||
991 __get_user(txc.errcnt, &utp->errcnt) ||
992 __get_user(txc.stbcnt, &utp->stbcnt))
995 ret = do_adjtimex(&txc);
997 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
998 __put_user(txc.modes, &utp->modes) ||
999 __put_user(txc.offset, &utp->offset) ||
1000 __put_user(txc.freq, &utp->freq) ||
1001 __put_user(txc.maxerror, &utp->maxerror) ||
1002 __put_user(txc.esterror, &utp->esterror) ||
1003 __put_user(txc.status, &utp->status) ||
1004 __put_user(txc.constant, &utp->constant) ||
1005 __put_user(txc.precision, &utp->precision) ||
1006 __put_user(txc.tolerance, &utp->tolerance) ||
1007 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1008 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1009 __put_user(txc.tick, &utp->tick) ||
1010 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
1011 __put_user(txc.jitter, &utp->jitter) ||
1012 __put_user(txc.shift, &utp->shift) ||
1013 __put_user(txc.stabil, &utp->stabil) ||
1014 __put_user(txc.jitcnt, &utp->jitcnt) ||
1015 __put_user(txc.calcnt, &utp->calcnt) ||
1016 __put_user(txc.errcnt, &utp->errcnt) ||
1017 __put_user(txc.stbcnt, &utp->stbcnt) ||
1018 __put_user(txc.tai, &utp->tai))
1025 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
1026 compat_uptr_t __user *pages32,
1027 const int __user *nodes,
1031 const void __user * __user *pages;
1034 pages = compat_alloc_user_space(nr_pages * sizeof(void *));
1035 for (i = 0; i < nr_pages; i++) {
1038 if (get_user(p, pages32 + i) ||
1039 put_user(compat_ptr(p), pages + i))
1042 return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
1045 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
1046 compat_ulong_t maxnode,
1047 const compat_ulong_t __user *old_nodes,
1048 const compat_ulong_t __user *new_nodes)
1050 unsigned long __user *old = NULL;
1051 unsigned long __user *new = NULL;
1052 nodemask_t tmp_mask;
1053 unsigned long nr_bits;
1056 nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
1057 size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
1059 if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
1061 old = compat_alloc_user_space(new_nodes ? size * 2 : size);
1063 new = old + size / sizeof(unsigned long);
1064 if (copy_to_user(old, nodes_addr(tmp_mask), size))
1068 if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
1071 new = compat_alloc_user_space(size);
1072 if (copy_to_user(new, nodes_addr(tmp_mask), size))
1075 return sys_migrate_pages(pid, nr_bits + 1, old, new);
1079 struct compat_sysinfo {
1093 char _f[20-2*sizeof(u32)-sizeof(int)];
1097 compat_sys_sysinfo(struct compat_sysinfo __user *info)
1103 /* Check to see if any memory value is too large for 32-bit and scale
1106 if ((s.totalram >> 32) || (s.totalswap >> 32)) {
1109 while (s.mem_unit < PAGE_SIZE) {
1114 s.totalram >>= bitcount;
1115 s.freeram >>= bitcount;
1116 s.sharedram >>= bitcount;
1117 s.bufferram >>= bitcount;
1118 s.totalswap >>= bitcount;
1119 s.freeswap >>= bitcount;
1120 s.totalhigh >>= bitcount;
1121 s.freehigh >>= bitcount;
1124 if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
1125 __put_user (s.uptime, &info->uptime) ||
1126 __put_user (s.loads[0], &info->loads[0]) ||
1127 __put_user (s.loads[1], &info->loads[1]) ||
1128 __put_user (s.loads[2], &info->loads[2]) ||
1129 __put_user (s.totalram, &info->totalram) ||
1130 __put_user (s.freeram, &info->freeram) ||
1131 __put_user (s.sharedram, &info->sharedram) ||
1132 __put_user (s.bufferram, &info->bufferram) ||
1133 __put_user (s.totalswap, &info->totalswap) ||
1134 __put_user (s.freeswap, &info->freeswap) ||
1135 __put_user (s.procs, &info->procs) ||
1136 __put_user (s.totalhigh, &info->totalhigh) ||
1137 __put_user (s.freehigh, &info->freehigh) ||
1138 __put_user (s.mem_unit, &info->mem_unit))