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>
29 #include <asm/uaccess.h>
32 * Note that the native side is already converted to a timespec, because
33 * that's what we want anyway.
35 static int compat_get_timeval(struct timespec *o,
36 struct compat_timeval __user *i)
40 if (get_user(o->tv_sec, &i->tv_sec) ||
41 get_user(usec, &i->tv_usec))
43 o->tv_nsec = usec * 1000;
47 static int compat_put_timeval(struct compat_timeval __user *o,
50 return (put_user(i->tv_sec, &o->tv_sec) ||
51 put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0;
54 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
55 struct timezone __user *tz)
59 do_gettimeofday(&ktv);
60 if (compat_put_timeval(tv, &ktv))
64 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
71 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
72 struct timezone __user *tz)
78 if (compat_get_timeval(&kts, tv))
82 if (copy_from_user(&ktz, tz, sizeof(ktz)))
86 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
89 int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
91 return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
92 __get_user(ts->tv_sec, &cts->tv_sec) ||
93 __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
96 int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
98 return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) ||
99 __put_user(ts->tv_sec, &cts->tv_sec) ||
100 __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
103 static long compat_nanosleep_restart(struct restart_block *restart)
105 struct compat_timespec __user *rmtp;
110 restart->nanosleep.rmtp = (struct timespec __user *) &rmt;
113 ret = hrtimer_nanosleep_restart(restart);
117 rmtp = restart->nanosleep.compat_rmtp;
119 if (rmtp && put_compat_timespec(&rmt, rmtp))
126 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
127 struct compat_timespec __user *rmtp)
129 struct timespec tu, rmt;
133 if (get_compat_timespec(&tu, rqtp))
136 if (!timespec_valid(&tu))
141 ret = hrtimer_nanosleep(&tu,
142 rmtp ? (struct timespec __user *)&rmt : NULL,
143 HRTIMER_MODE_REL, CLOCK_MONOTONIC);
147 struct restart_block *restart
148 = ¤t_thread_info()->restart_block;
150 restart->fn = compat_nanosleep_restart;
151 restart->nanosleep.compat_rmtp = rmtp;
153 if (rmtp && put_compat_timespec(&rmt, rmtp))
160 static inline long get_compat_itimerval(struct itimerval *o,
161 struct compat_itimerval __user *i)
163 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
164 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
165 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
166 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
167 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
170 static inline long put_compat_itimerval(struct compat_itimerval __user *o,
173 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
174 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
175 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
176 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
177 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
180 asmlinkage long compat_sys_getitimer(int which,
181 struct compat_itimerval __user *it)
183 struct itimerval kit;
186 error = do_getitimer(which, &kit);
187 if (!error && put_compat_itimerval(it, &kit))
192 asmlinkage long compat_sys_setitimer(int which,
193 struct compat_itimerval __user *in,
194 struct compat_itimerval __user *out)
196 struct itimerval kin, kout;
200 if (get_compat_itimerval(&kin, in))
203 memset(&kin, 0, sizeof(kin));
205 error = do_setitimer(which, &kin, out ? &kout : NULL);
208 if (put_compat_itimerval(out, &kout))
213 static compat_clock_t clock_t_to_compat_clock_t(clock_t x)
215 return compat_jiffies_to_clock_t(clock_t_to_jiffies(x));
218 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
222 struct compat_tms tmp;
225 /* Convert our struct tms to the compat version. */
226 tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime);
227 tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime);
228 tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime);
229 tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime);
230 if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
233 force_successful_syscall_return();
234 return compat_jiffies_to_clock_t(jiffies);
238 * Assumption: old_sigset_t and compat_old_sigset_t are both
239 * types that can be passed to put_user()/get_user().
242 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
246 mm_segment_t old_fs = get_fs();
249 ret = sys_sigpending((old_sigset_t __user *) &s);
252 ret = put_user(s, set);
256 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set,
257 compat_old_sigset_t __user *oset)
263 if (set && get_user(s, set))
267 ret = sys_sigprocmask(how,
268 set ? (old_sigset_t __user *) &s : NULL,
269 oset ? (old_sigset_t __user *) &s : NULL);
273 ret = put_user(s, oset);
277 asmlinkage long compat_sys_setrlimit(unsigned int resource,
278 struct compat_rlimit __user *rlim)
282 mm_segment_t old_fs = get_fs ();
284 if (resource >= RLIM_NLIMITS)
287 if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
288 __get_user(r.rlim_cur, &rlim->rlim_cur) ||
289 __get_user(r.rlim_max, &rlim->rlim_max))
292 if (r.rlim_cur == COMPAT_RLIM_INFINITY)
293 r.rlim_cur = RLIM_INFINITY;
294 if (r.rlim_max == COMPAT_RLIM_INFINITY)
295 r.rlim_max = RLIM_INFINITY;
297 ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
302 #ifdef COMPAT_RLIM_OLD_INFINITY
304 asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
305 struct compat_rlimit __user *rlim)
309 mm_segment_t old_fs = get_fs();
312 ret = sys_old_getrlimit(resource, &r);
316 if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
317 r.rlim_cur = COMPAT_RLIM_INFINITY;
318 if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
319 r.rlim_max = COMPAT_RLIM_INFINITY;
321 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
322 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
323 __put_user(r.rlim_max, &rlim->rlim_max))
331 asmlinkage long compat_sys_getrlimit (unsigned int resource,
332 struct compat_rlimit __user *rlim)
336 mm_segment_t old_fs = get_fs();
339 ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
342 if (r.rlim_cur > COMPAT_RLIM_INFINITY)
343 r.rlim_cur = COMPAT_RLIM_INFINITY;
344 if (r.rlim_max > COMPAT_RLIM_INFINITY)
345 r.rlim_max = COMPAT_RLIM_INFINITY;
347 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
348 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
349 __put_user(r.rlim_max, &rlim->rlim_max))
355 int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
357 if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
358 __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
359 __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
360 __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
361 __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
362 __put_user(r->ru_maxrss, &ru->ru_maxrss) ||
363 __put_user(r->ru_ixrss, &ru->ru_ixrss) ||
364 __put_user(r->ru_idrss, &ru->ru_idrss) ||
365 __put_user(r->ru_isrss, &ru->ru_isrss) ||
366 __put_user(r->ru_minflt, &ru->ru_minflt) ||
367 __put_user(r->ru_majflt, &ru->ru_majflt) ||
368 __put_user(r->ru_nswap, &ru->ru_nswap) ||
369 __put_user(r->ru_inblock, &ru->ru_inblock) ||
370 __put_user(r->ru_oublock, &ru->ru_oublock) ||
371 __put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
372 __put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
373 __put_user(r->ru_nsignals, &ru->ru_nsignals) ||
374 __put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
375 __put_user(r->ru_nivcsw, &ru->ru_nivcsw))
380 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
384 mm_segment_t old_fs = get_fs();
387 ret = sys_getrusage(who, (struct rusage __user *) &r);
393 if (put_compat_rusage(&r, ru))
400 compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
401 struct compat_rusage __user *ru)
404 return sys_wait4(pid, stat_addr, options, NULL);
409 mm_segment_t old_fs = get_fs();
414 (unsigned int __user *) &status : NULL),
415 options, (struct rusage __user *) &r);
419 if (put_compat_rusage(&r, ru))
421 if (stat_addr && put_user(status, stat_addr))
428 asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
429 struct compat_siginfo __user *uinfo, int options,
430 struct compat_rusage __user *uru)
435 mm_segment_t old_fs = get_fs();
437 memset(&info, 0, sizeof(info));
440 ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
441 uru ? (struct rusage __user *)&ru : NULL);
444 if ((ret < 0) || (info.si_signo == 0))
448 ret = put_compat_rusage(&ru, uru);
453 BUG_ON(info.si_code & __SI_MASK);
454 info.si_code |= __SI_CHLD;
455 return copy_siginfo_to_user32(uinfo, &info);
458 static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
459 unsigned len, struct cpumask *new_mask)
463 if (len < cpumask_size())
464 memset(new_mask, 0, cpumask_size());
465 else if (len > cpumask_size())
466 len = cpumask_size();
468 k = cpumask_bits(new_mask);
469 return compat_get_bitmap(k, user_mask_ptr, len * 8);
472 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
474 compat_ulong_t __user *user_mask_ptr)
476 cpumask_var_t new_mask;
479 if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
482 retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
486 retval = sched_setaffinity(pid, new_mask);
488 free_cpumask_var(new_mask);
492 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
493 compat_ulong_t __user *user_mask_ptr)
498 unsigned int min_length = cpumask_size();
500 if (nr_cpu_ids <= BITS_PER_COMPAT_LONG)
501 min_length = sizeof(compat_ulong_t);
503 if (len < min_length)
506 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
509 ret = sched_getaffinity(pid, mask);
513 k = cpumask_bits(mask);
514 ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
519 free_cpumask_var(mask);
523 int get_compat_itimerspec(struct itimerspec *dst,
524 const struct compat_itimerspec __user *src)
526 if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
527 get_compat_timespec(&dst->it_value, &src->it_value))
532 int put_compat_itimerspec(struct compat_itimerspec __user *dst,
533 const struct itimerspec *src)
535 if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
536 put_compat_timespec(&src->it_value, &dst->it_value))
541 long compat_sys_timer_create(clockid_t which_clock,
542 struct compat_sigevent __user *timer_event_spec,
543 timer_t __user *created_timer_id)
545 struct sigevent __user *event = NULL;
547 if (timer_event_spec) {
548 struct sigevent kevent;
550 event = compat_alloc_user_space(sizeof(*event));
551 if (get_compat_sigevent(&kevent, timer_event_spec) ||
552 copy_to_user(event, &kevent, sizeof(*event)))
556 return sys_timer_create(which_clock, event, created_timer_id);
559 long compat_sys_timer_settime(timer_t timer_id, int flags,
560 struct compat_itimerspec __user *new,
561 struct compat_itimerspec __user *old)
565 struct itimerspec newts, oldts;
569 if (get_compat_itimerspec(&newts, new))
573 err = sys_timer_settime(timer_id, flags,
574 (struct itimerspec __user *) &newts,
575 (struct itimerspec __user *) &oldts);
577 if (!err && old && put_compat_itimerspec(old, &oldts))
582 long compat_sys_timer_gettime(timer_t timer_id,
583 struct compat_itimerspec __user *setting)
587 struct itimerspec ts;
591 err = sys_timer_gettime(timer_id,
592 (struct itimerspec __user *) &ts);
594 if (!err && put_compat_itimerspec(setting, &ts))
599 long compat_sys_clock_settime(clockid_t which_clock,
600 struct compat_timespec __user *tp)
606 if (get_compat_timespec(&ts, tp))
610 err = sys_clock_settime(which_clock,
611 (struct timespec __user *) &ts);
616 long compat_sys_clock_gettime(clockid_t which_clock,
617 struct compat_timespec __user *tp)
625 err = sys_clock_gettime(which_clock,
626 (struct timespec __user *) &ts);
628 if (!err && put_compat_timespec(&ts, tp))
633 long compat_sys_clock_getres(clockid_t which_clock,
634 struct compat_timespec __user *tp)
642 err = sys_clock_getres(which_clock,
643 (struct timespec __user *) &ts);
645 if (!err && tp && put_compat_timespec(&ts, tp))
650 static long compat_clock_nanosleep_restart(struct restart_block *restart)
655 struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
657 restart->nanosleep.rmtp = (struct timespec __user *) &tu;
660 err = clock_nanosleep_restart(restart);
663 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
664 put_compat_timespec(&tu, rmtp))
667 if (err == -ERESTART_RESTARTBLOCK) {
668 restart->fn = compat_clock_nanosleep_restart;
669 restart->nanosleep.compat_rmtp = rmtp;
674 long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
675 struct compat_timespec __user *rqtp,
676 struct compat_timespec __user *rmtp)
680 struct timespec in, out;
681 struct restart_block *restart;
683 if (get_compat_timespec(&in, rqtp))
688 err = sys_clock_nanosleep(which_clock, flags,
689 (struct timespec __user *) &in,
690 (struct timespec __user *) &out);
693 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
694 put_compat_timespec(&out, rmtp))
697 if (err == -ERESTART_RESTARTBLOCK) {
698 restart = ¤t_thread_info()->restart_block;
699 restart->fn = compat_clock_nanosleep_restart;
700 restart->nanosleep.compat_rmtp = rmtp;
706 * We currently only need the following fields from the sigevent
707 * structure: sigev_value, sigev_signo, sig_notify and (sometimes
708 * sigev_notify_thread_id). The others are handled in user mode.
709 * We also assume that copying sigev_value.sival_int is sufficient
710 * to keep all the bits of sigev_value.sival_ptr intact.
712 int get_compat_sigevent(struct sigevent *event,
713 const struct compat_sigevent __user *u_event)
715 memset(event, 0, sizeof(*event));
716 return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) ||
717 __get_user(event->sigev_value.sival_int,
718 &u_event->sigev_value.sival_int) ||
719 __get_user(event->sigev_signo, &u_event->sigev_signo) ||
720 __get_user(event->sigev_notify, &u_event->sigev_notify) ||
721 __get_user(event->sigev_notify_thread_id,
722 &u_event->sigev_notify_thread_id))
726 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
727 unsigned long bitmap_size)
732 unsigned long nr_compat_longs;
734 /* align bitmap up to nearest compat_long_t boundary */
735 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
737 if (!access_ok(VERIFY_READ, umask, bitmap_size / 8))
740 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
742 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
745 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
747 * We dont want to read past the end of the userspace
748 * bitmap. We must however ensure the end of the
749 * kernel bitmap is zeroed.
751 if (nr_compat_longs-- > 0) {
752 if (__get_user(um, umask))
759 m |= (long)um << (j * BITS_PER_COMPAT_LONG);
767 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
768 unsigned long bitmap_size)
773 unsigned long nr_compat_longs;
775 /* align bitmap up to nearest compat_long_t boundary */
776 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
778 if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8))
781 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
783 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
786 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
790 * We dont want to write past the end of the userspace
793 if (nr_compat_longs-- > 0) {
794 if (__put_user(um, umask))
808 sigset_from_compat (sigset_t *set, compat_sigset_t *compat)
810 switch (_NSIG_WORDS) {
811 case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
812 case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
813 case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
814 case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
819 compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese,
820 struct compat_siginfo __user *uinfo,
821 struct compat_timespec __user *uts, compat_size_t sigsetsize)
828 long ret, timeout = 0;
830 if (sigsetsize != sizeof(sigset_t))
833 if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
835 sigset_from_compat(&s, &s32);
836 sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
840 if (get_compat_timespec (&t, uts))
842 if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
847 spin_lock_irq(¤t->sighand->siglock);
848 sig = dequeue_signal(current, &s, &info);
850 timeout = MAX_SCHEDULE_TIMEOUT;
852 timeout = timespec_to_jiffies(&t)
853 +(t.tv_sec || t.tv_nsec);
855 current->real_blocked = current->blocked;
856 sigandsets(¤t->blocked, ¤t->blocked, &s);
859 spin_unlock_irq(¤t->sighand->siglock);
861 timeout = schedule_timeout_interruptible(timeout);
863 spin_lock_irq(¤t->sighand->siglock);
864 sig = dequeue_signal(current, &s, &info);
865 current->blocked = current->real_blocked;
866 siginitset(¤t->real_blocked, 0);
870 spin_unlock_irq(¤t->sighand->siglock);
875 if (copy_siginfo_to_user32(uinfo, &info))
879 ret = timeout?-EINTR:-EAGAIN;
886 compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
887 struct compat_siginfo __user *uinfo)
891 if (copy_siginfo_from_user32(&info, uinfo))
893 return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
896 #ifdef __ARCH_WANT_COMPAT_SYS_TIME
898 /* compat_time_t is a 32 bit "long" and needs to get converted. */
900 asmlinkage long compat_sys_time(compat_time_t __user * tloc)
905 do_gettimeofday(&tv);
909 if (put_user(i,tloc))
912 force_successful_syscall_return();
916 asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
921 if (get_user(tv.tv_sec, tptr))
926 err = security_settime(&tv, NULL);
930 do_settimeofday(&tv);
934 #endif /* __ARCH_WANT_COMPAT_SYS_TIME */
936 #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
937 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize)
940 compat_sigset_t newset32;
942 /* XXX: Don't preclude handling different sized sigset_t's. */
943 if (sigsetsize != sizeof(sigset_t))
946 if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
948 sigset_from_compat(&newset, &newset32);
949 sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
951 spin_lock_irq(¤t->sighand->siglock);
952 current->saved_sigmask = current->blocked;
953 current->blocked = newset;
955 spin_unlock_irq(¤t->sighand->siglock);
957 current->state = TASK_INTERRUPTIBLE;
959 set_restore_sigmask();
960 return -ERESTARTNOHAND;
962 #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */
964 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
969 memset(&txc, 0, sizeof(struct timex));
971 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
972 __get_user(txc.modes, &utp->modes) ||
973 __get_user(txc.offset, &utp->offset) ||
974 __get_user(txc.freq, &utp->freq) ||
975 __get_user(txc.maxerror, &utp->maxerror) ||
976 __get_user(txc.esterror, &utp->esterror) ||
977 __get_user(txc.status, &utp->status) ||
978 __get_user(txc.constant, &utp->constant) ||
979 __get_user(txc.precision, &utp->precision) ||
980 __get_user(txc.tolerance, &utp->tolerance) ||
981 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
982 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
983 __get_user(txc.tick, &utp->tick) ||
984 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
985 __get_user(txc.jitter, &utp->jitter) ||
986 __get_user(txc.shift, &utp->shift) ||
987 __get_user(txc.stabil, &utp->stabil) ||
988 __get_user(txc.jitcnt, &utp->jitcnt) ||
989 __get_user(txc.calcnt, &utp->calcnt) ||
990 __get_user(txc.errcnt, &utp->errcnt) ||
991 __get_user(txc.stbcnt, &utp->stbcnt))
994 ret = do_adjtimex(&txc);
996 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
997 __put_user(txc.modes, &utp->modes) ||
998 __put_user(txc.offset, &utp->offset) ||
999 __put_user(txc.freq, &utp->freq) ||
1000 __put_user(txc.maxerror, &utp->maxerror) ||
1001 __put_user(txc.esterror, &utp->esterror) ||
1002 __put_user(txc.status, &utp->status) ||
1003 __put_user(txc.constant, &utp->constant) ||
1004 __put_user(txc.precision, &utp->precision) ||
1005 __put_user(txc.tolerance, &utp->tolerance) ||
1006 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1007 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1008 __put_user(txc.tick, &utp->tick) ||
1009 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
1010 __put_user(txc.jitter, &utp->jitter) ||
1011 __put_user(txc.shift, &utp->shift) ||
1012 __put_user(txc.stabil, &utp->stabil) ||
1013 __put_user(txc.jitcnt, &utp->jitcnt) ||
1014 __put_user(txc.calcnt, &utp->calcnt) ||
1015 __put_user(txc.errcnt, &utp->errcnt) ||
1016 __put_user(txc.stbcnt, &utp->stbcnt) ||
1017 __put_user(txc.tai, &utp->tai))
1024 asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
1025 compat_uptr_t __user *pages32,
1026 const int __user *nodes,
1030 const void __user * __user *pages;
1033 pages = compat_alloc_user_space(nr_pages * sizeof(void *));
1034 for (i = 0; i < nr_pages; i++) {
1037 if (get_user(p, pages32 + i) ||
1038 put_user(compat_ptr(p), pages + i))
1041 return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
1044 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
1045 compat_ulong_t maxnode,
1046 const compat_ulong_t __user *old_nodes,
1047 const compat_ulong_t __user *new_nodes)
1049 unsigned long __user *old = NULL;
1050 unsigned long __user *new = NULL;
1051 nodemask_t tmp_mask;
1052 unsigned long nr_bits;
1055 nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
1056 size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
1058 if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
1060 old = compat_alloc_user_space(new_nodes ? size * 2 : size);
1062 new = old + size / sizeof(unsigned long);
1063 if (copy_to_user(old, nodes_addr(tmp_mask), size))
1067 if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
1070 new = compat_alloc_user_space(size);
1071 if (copy_to_user(new, nodes_addr(tmp_mask), size))
1074 return sys_migrate_pages(pid, nr_bits + 1, old, new);
1078 struct compat_sysinfo {
1092 char _f[20-2*sizeof(u32)-sizeof(int)];
1096 compat_sys_sysinfo(struct compat_sysinfo __user *info)
1102 /* Check to see if any memory value is too large for 32-bit and scale
1105 if ((s.totalram >> 32) || (s.totalswap >> 32)) {
1108 while (s.mem_unit < PAGE_SIZE) {
1113 s.totalram >>= bitcount;
1114 s.freeram >>= bitcount;
1115 s.sharedram >>= bitcount;
1116 s.bufferram >>= bitcount;
1117 s.totalswap >>= bitcount;
1118 s.freeswap >>= bitcount;
1119 s.totalhigh >>= bitcount;
1120 s.freehigh >>= bitcount;
1123 if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
1124 __put_user (s.uptime, &info->uptime) ||
1125 __put_user (s.loads[0], &info->loads[0]) ||
1126 __put_user (s.loads[1], &info->loads[1]) ||
1127 __put_user (s.loads[2], &info->loads[2]) ||
1128 __put_user (s.totalram, &info->totalram) ||
1129 __put_user (s.freeram, &info->freeram) ||
1130 __put_user (s.sharedram, &info->sharedram) ||
1131 __put_user (s.bufferram, &info->bufferram) ||
1132 __put_user (s.totalswap, &info->totalswap) ||
1133 __put_user (s.freeswap, &info->freeswap) ||
1134 __put_user (s.procs, &info->procs) ||
1135 __put_user (s.totalhigh, &info->totalhigh) ||
1136 __put_user (s.freehigh, &info->freehigh) ||
1137 __put_user (s.mem_unit, &info->mem_unit))