| /* |
| * linux/kernel/compat.c |
| * |
| * Kernel compatibililty routines for e.g. 32 bit syscall support |
| * on 64 bit kernels. |
| * |
| * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <linux/compat.h> |
| #include <linux/errno.h> |
| #include <linux/time.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */ |
| #include <linux/syscalls.h> |
| #include <linux/unistd.h> |
| #include <linux/security.h> |
| #include <linux/timex.h> |
| #include <linux/migrate.h> |
| #include <linux/posix-timers.h> |
| |
| #include <asm/uaccess.h> |
| |
| int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
| { |
| return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || |
| __get_user(ts->tv_sec, &cts->tv_sec) || |
| __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
| } |
| |
| int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) |
| { |
| return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || |
| __put_user(ts->tv_sec, &cts->tv_sec) || |
| __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; |
| } |
| |
| static long compat_nanosleep_restart(struct restart_block *restart) |
| { |
| unsigned long expire = restart->arg0, now = jiffies; |
| struct compat_timespec __user *rmtp; |
| |
| /* Did it expire while we handled signals? */ |
| if (!time_after(expire, now)) |
| return 0; |
| |
| expire = schedule_timeout_interruptible(expire - now); |
| if (expire == 0) |
| return 0; |
| |
| rmtp = (struct compat_timespec __user *)restart->arg1; |
| if (rmtp) { |
| struct compat_timespec ct; |
| struct timespec t; |
| |
| jiffies_to_timespec(expire, &t); |
| ct.tv_sec = t.tv_sec; |
| ct.tv_nsec = t.tv_nsec; |
| if (copy_to_user(rmtp, &ct, sizeof(ct))) |
| return -EFAULT; |
| } |
| /* The 'restart' block is already filled in */ |
| return -ERESTART_RESTARTBLOCK; |
| } |
| |
| asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
| struct compat_timespec __user *rmtp) |
| { |
| struct timespec t; |
| struct restart_block *restart; |
| unsigned long expire; |
| |
| if (get_compat_timespec(&t, rqtp)) |
| return -EFAULT; |
| |
| if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0)) |
| return -EINVAL; |
| |
| expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec); |
| expire = schedule_timeout_interruptible(expire); |
| if (expire == 0) |
| return 0; |
| |
| if (rmtp) { |
| jiffies_to_timespec(expire, &t); |
| if (put_compat_timespec(&t, rmtp)) |
| return -EFAULT; |
| } |
| restart = ¤t_thread_info()->restart_block; |
| restart->fn = compat_nanosleep_restart; |
| restart->arg0 = jiffies + expire; |
| restart->arg1 = (unsigned long) rmtp; |
| return -ERESTART_RESTARTBLOCK; |
| } |
| |
| static inline long get_compat_itimerval(struct itimerval *o, |
| struct compat_itimerval __user *i) |
| { |
| return (!access_ok(VERIFY_READ, i, sizeof(*i)) || |
| (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | |
| __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | |
| __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | |
| __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); |
| } |
| |
| static inline long put_compat_itimerval(struct compat_itimerval __user *o, |
| struct itimerval *i) |
| { |
| return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || |
| (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | |
| __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | |
| __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | |
| __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); |
| } |
| |
| asmlinkage long compat_sys_getitimer(int which, |
| struct compat_itimerval __user *it) |
| { |
| struct itimerval kit; |
| int error; |
| |
| error = do_getitimer(which, &kit); |
| if (!error && put_compat_itimerval(it, &kit)) |
| error = -EFAULT; |
| return error; |
| } |
| |
| asmlinkage long compat_sys_setitimer(int which, |
| struct compat_itimerval __user *in, |
| struct compat_itimerval __user *out) |
| { |
| struct itimerval kin, kout; |
| int error; |
| |
| if (in) { |
| if (get_compat_itimerval(&kin, in)) |
| return -EFAULT; |
| } else |
| memset(&kin, 0, sizeof(kin)); |
| |
| error = do_setitimer(which, &kin, out ? &kout : NULL); |
| if (error || !out) |
| return error; |
| if (put_compat_itimerval(out, &kout)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
| { |
| /* |
| * In the SMP world we might just be unlucky and have one of |
| * the times increment as we use it. Since the value is an |
| * atomically safe type this is just fine. Conceptually its |
| * as if the syscall took an instant longer to occur. |
| */ |
| if (tbuf) { |
| struct compat_tms tmp; |
| struct task_struct *tsk = current; |
| struct task_struct *t; |
| cputime_t utime, stime, cutime, cstime; |
| |
| read_lock(&tasklist_lock); |
| utime = tsk->signal->utime; |
| stime = tsk->signal->stime; |
| t = tsk; |
| do { |
| utime = cputime_add(utime, t->utime); |
| stime = cputime_add(stime, t->stime); |
| t = next_thread(t); |
| } while (t != tsk); |
| |
| /* |
| * While we have tasklist_lock read-locked, no dying thread |
| * can be updating current->signal->[us]time. Instead, |
| * we got their counts included in the live thread loop. |
| * However, another thread can come in right now and |
| * do a wait call that updates current->signal->c[us]time. |
| * To make sure we always see that pair updated atomically, |
| * we take the siglock around fetching them. |
| */ |
| spin_lock_irq(&tsk->sighand->siglock); |
| cutime = tsk->signal->cutime; |
| cstime = tsk->signal->cstime; |
| spin_unlock_irq(&tsk->sighand->siglock); |
| read_unlock(&tasklist_lock); |
| |
| tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime)); |
| tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime)); |
| tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime)); |
| tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime)); |
| if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
| return -EFAULT; |
| } |
| return compat_jiffies_to_clock_t(jiffies); |
| } |
| |
| /* |
| * Assumption: old_sigset_t and compat_old_sigset_t are both |
| * types that can be passed to put_user()/get_user(). |
| */ |
| |
| asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) |
| { |
| old_sigset_t s; |
| long ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_sigpending((old_sigset_t __user *) &s); |
| set_fs(old_fs); |
| if (ret == 0) |
| ret = put_user(s, set); |
| return ret; |
| } |
| |
| asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
| compat_old_sigset_t __user *oset) |
| { |
| old_sigset_t s; |
| long ret; |
| mm_segment_t old_fs; |
| |
| if (set && get_user(s, set)) |
| return -EFAULT; |
| old_fs = get_fs(); |
| set_fs(KERNEL_DS); |
| ret = sys_sigprocmask(how, |
| set ? (old_sigset_t __user *) &s : NULL, |
| oset ? (old_sigset_t __user *) &s : NULL); |
| set_fs(old_fs); |
| if (ret == 0) |
| if (oset) |
| ret = put_user(s, oset); |
| return ret; |
| } |
| |
| asmlinkage long compat_sys_setrlimit(unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| int ret; |
| mm_segment_t old_fs = get_fs (); |
| |
| if (resource >= RLIM_NLIMITS) |
| return -EINVAL; |
| |
| if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || |
| __get_user(r.rlim_cur, &rlim->rlim_cur) || |
| __get_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| |
| if (r.rlim_cur == COMPAT_RLIM_INFINITY) |
| r.rlim_cur = RLIM_INFINITY; |
| if (r.rlim_max == COMPAT_RLIM_INFINITY) |
| r.rlim_max = RLIM_INFINITY; |
| set_fs(KERNEL_DS); |
| ret = sys_setrlimit(resource, (struct rlimit __user *) &r); |
| set_fs(old_fs); |
| return ret; |
| } |
| |
| #ifdef COMPAT_RLIM_OLD_INFINITY |
| |
| asmlinkage long compat_sys_old_getrlimit(unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| int ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_old_getrlimit(resource, &r); |
| set_fs(old_fs); |
| |
| if (!ret) { |
| if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) |
| r.rlim_cur = COMPAT_RLIM_INFINITY; |
| if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) |
| r.rlim_max = COMPAT_RLIM_INFINITY; |
| |
| if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
| __put_user(r.rlim_cur, &rlim->rlim_cur) || |
| __put_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| |
| #endif |
| |
| asmlinkage long compat_sys_getrlimit (unsigned int resource, |
| struct compat_rlimit __user *rlim) |
| { |
| struct rlimit r; |
| int ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_getrlimit(resource, (struct rlimit __user *) &r); |
| set_fs(old_fs); |
| if (!ret) { |
| if (r.rlim_cur > COMPAT_RLIM_INFINITY) |
| r.rlim_cur = COMPAT_RLIM_INFINITY; |
| if (r.rlim_max > COMPAT_RLIM_INFINITY) |
| r.rlim_max = COMPAT_RLIM_INFINITY; |
| |
| if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || |
| __put_user(r.rlim_cur, &rlim->rlim_cur) || |
| __put_user(r.rlim_max, &rlim->rlim_max)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| |
| int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) |
| { |
| if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || |
| __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || |
| __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || |
| __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || |
| __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || |
| __put_user(r->ru_maxrss, &ru->ru_maxrss) || |
| __put_user(r->ru_ixrss, &ru->ru_ixrss) || |
| __put_user(r->ru_idrss, &ru->ru_idrss) || |
| __put_user(r->ru_isrss, &ru->ru_isrss) || |
| __put_user(r->ru_minflt, &ru->ru_minflt) || |
| __put_user(r->ru_majflt, &ru->ru_majflt) || |
| __put_user(r->ru_nswap, &ru->ru_nswap) || |
| __put_user(r->ru_inblock, &ru->ru_inblock) || |
| __put_user(r->ru_oublock, &ru->ru_oublock) || |
| __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || |
| __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || |
| __put_user(r->ru_nsignals, &ru->ru_nsignals) || |
| __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || |
| __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) |
| { |
| struct rusage r; |
| int ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_getrusage(who, (struct rusage __user *) &r); |
| set_fs(old_fs); |
| |
| if (ret) |
| return ret; |
| |
| if (put_compat_rusage(&r, ru)) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| asmlinkage long |
| compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, |
| struct compat_rusage __user *ru) |
| { |
| if (!ru) { |
| return sys_wait4(pid, stat_addr, options, NULL); |
| } else { |
| struct rusage r; |
| int ret; |
| unsigned int status; |
| mm_segment_t old_fs = get_fs(); |
| |
| set_fs (KERNEL_DS); |
| ret = sys_wait4(pid, |
| (stat_addr ? |
| (unsigned int __user *) &status : NULL), |
| options, (struct rusage __user *) &r); |
| set_fs (old_fs); |
| |
| if (ret > 0) { |
| if (put_compat_rusage(&r, ru)) |
| return -EFAULT; |
| if (stat_addr && put_user(status, stat_addr)) |
| return -EFAULT; |
| } |
| return ret; |
| } |
| } |
| |
| asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, |
| struct compat_siginfo __user *uinfo, int options, |
| struct compat_rusage __user *uru) |
| { |
| siginfo_t info; |
| struct rusage ru; |
| long ret; |
| mm_segment_t old_fs = get_fs(); |
| |
| memset(&info, 0, sizeof(info)); |
| |
| set_fs(KERNEL_DS); |
| ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, |
| uru ? (struct rusage __user *)&ru : NULL); |
| set_fs(old_fs); |
| |
| if ((ret < 0) || (info.si_signo == 0)) |
| return ret; |
| |
| if (uru) { |
| ret = put_compat_rusage(&ru, uru); |
| if (ret) |
| return ret; |
| } |
| |
| BUG_ON(info.si_code & __SI_MASK); |
| info.si_code |= __SI_CHLD; |
| return copy_siginfo_to_user32(uinfo, &info); |
| } |
| |
| static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, |
| unsigned len, cpumask_t *new_mask) |
| { |
| unsigned long *k; |
| |
| if (len < sizeof(cpumask_t)) |
| memset(new_mask, 0, sizeof(cpumask_t)); |
| else if (len > sizeof(cpumask_t)) |
| len = sizeof(cpumask_t); |
| |
| k = cpus_addr(*new_mask); |
| return compat_get_bitmap(k, user_mask_ptr, len * 8); |
| } |
| |
| asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, |
| unsigned int len, |
| compat_ulong_t __user *user_mask_ptr) |
| { |
| cpumask_t new_mask; |
| int retval; |
| |
| retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask); |
| if (retval) |
| return retval; |
| |
| return sched_setaffinity(pid, new_mask); |
| } |
| |
| asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, |
| compat_ulong_t __user *user_mask_ptr) |
| { |
| int ret; |
| cpumask_t mask; |
| unsigned long *k; |
| unsigned int min_length = sizeof(cpumask_t); |
| |
| if (NR_CPUS <= BITS_PER_COMPAT_LONG) |
| min_length = sizeof(compat_ulong_t); |
| |
| if (len < min_length) |
| return -EINVAL; |
| |
| ret = sched_getaffinity(pid, &mask); |
| if (ret < 0) |
| return ret; |
| |
| k = cpus_addr(mask); |
| ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8); |
| if (ret) |
| return ret; |
| |
| return min_length; |
| } |
| |
| static int get_compat_itimerspec(struct itimerspec *dst, |
| struct compat_itimerspec __user *src) |
| { |
| if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
| get_compat_timespec(&dst->it_value, &src->it_value)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
| struct itimerspec *src) |
| { |
| if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
| put_compat_timespec(&src->it_value, &dst->it_value)) |
| return -EFAULT; |
| return 0; |
| } |
| |
| long compat_sys_timer_create(clockid_t which_clock, |
| struct compat_sigevent __user *timer_event_spec, |
| timer_t __user *created_timer_id) |
| { |
| struct sigevent __user *event = NULL; |
| |
| if (timer_event_spec) { |
| struct sigevent kevent; |
| |
| event = compat_alloc_user_space(sizeof(*event)); |
| if (get_compat_sigevent(&kevent, timer_event_spec) || |
| copy_to_user(event, &kevent, sizeof(*event))) |
| return -EFAULT; |
| } |
| |
| return sys_timer_create(which_clock, event, created_timer_id); |
| } |
| |
| long compat_sys_timer_settime(timer_t timer_id, int flags, |
| struct compat_itimerspec __user *new, |
| struct compat_itimerspec __user *old) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct itimerspec newts, oldts; |
| |
| if (!new) |
| return -EINVAL; |
| if (get_compat_itimerspec(&newts, new)) |
| return -EFAULT; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_timer_settime(timer_id, flags, |
| (struct itimerspec __user *) &newts, |
| (struct itimerspec __user *) &oldts); |
| set_fs(oldfs); |
| if (!err && old && put_compat_itimerspec(old, &oldts)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_timer_gettime(timer_t timer_id, |
| struct compat_itimerspec __user *setting) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct itimerspec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_timer_gettime(timer_id, |
| (struct itimerspec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && put_compat_itimerspec(setting, &ts)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_clock_settime(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| if (get_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_settime(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| return err; |
| } |
| |
| long compat_sys_clock_gettime(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_gettime(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && put_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| return err; |
| } |
| |
| long compat_sys_clock_getres(clockid_t which_clock, |
| struct compat_timespec __user *tp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec ts; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_getres(which_clock, |
| (struct timespec __user *) &ts); |
| set_fs(oldfs); |
| if (!err && tp && put_compat_timespec(&ts, tp)) |
| return -EFAULT; |
| return err; |
| } |
| |
| static long compat_clock_nanosleep_restart(struct restart_block *restart) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec tu; |
| struct compat_timespec *rmtp = (struct compat_timespec *)(restart->arg1); |
| |
| restart->arg1 = (unsigned long) &tu; |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = clock_nanosleep_restart(restart); |
| set_fs(oldfs); |
| |
| if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
| put_compat_timespec(&tu, rmtp)) |
| return -EFAULT; |
| |
| if (err == -ERESTART_RESTARTBLOCK) { |
| restart->fn = compat_clock_nanosleep_restart; |
| restart->arg1 = (unsigned long) rmtp; |
| } |
| return err; |
| } |
| |
| long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
| struct compat_timespec __user *rqtp, |
| struct compat_timespec __user *rmtp) |
| { |
| long err; |
| mm_segment_t oldfs; |
| struct timespec in, out; |
| struct restart_block *restart; |
| |
| if (get_compat_timespec(&in, rqtp)) |
| return -EFAULT; |
| |
| oldfs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = sys_clock_nanosleep(which_clock, flags, |
| (struct timespec __user *) &in, |
| (struct timespec __user *) &out); |
| set_fs(oldfs); |
| |
| if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
| put_compat_timespec(&out, rmtp)) |
| return -EFAULT; |
| |
| if (err == -ERESTART_RESTARTBLOCK) { |
| restart = ¤t_thread_info()->restart_block; |
| restart->fn = compat_clock_nanosleep_restart; |
| restart->arg1 = (unsigned long) rmtp; |
| } |
| return err; |
| } |
| |
| /* |
| * We currently only need the following fields from the sigevent |
| * structure: sigev_value, sigev_signo, sig_notify and (sometimes |
| * sigev_notify_thread_id). The others are handled in user mode. |
| * We also assume that copying sigev_value.sival_int is sufficient |
| * to keep all the bits of sigev_value.sival_ptr intact. |
| */ |
| int get_compat_sigevent(struct sigevent *event, |
| const struct compat_sigevent __user *u_event) |
| { |
| memset(event, 0, sizeof(*event)); |
| return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
| __get_user(event->sigev_value.sival_int, |
| &u_event->sigev_value.sival_int) || |
| __get_user(event->sigev_signo, &u_event->sigev_signo) || |
| __get_user(event->sigev_notify, &u_event->sigev_notify) || |
| __get_user(event->sigev_notify_thread_id, |
| &u_event->sigev_notify_thread_id)) |
| ? -EFAULT : 0; |
| } |
| |
| long compat_get_bitmap(unsigned long *mask, compat_ulong_t __user *umask, |
| unsigned long bitmap_size) |
| { |
| int i, j; |
| unsigned long m; |
| compat_ulong_t um; |
| unsigned long nr_compat_longs; |
| |
| /* align bitmap up to nearest compat_long_t boundary */ |
| bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
| |
| if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) |
| return -EFAULT; |
| |
| nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
| |
| for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
| m = 0; |
| |
| for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
| /* |
| * We dont want to read past the end of the userspace |
| * bitmap. We must however ensure the end of the |
| * kernel bitmap is zeroed. |
| */ |
| if (nr_compat_longs-- > 0) { |
| if (__get_user(um, umask)) |
| return -EFAULT; |
| } else { |
| um = 0; |
| } |
| |
| umask++; |
| m |= (long)um << (j * BITS_PER_COMPAT_LONG); |
| } |
| *mask++ = m; |
| } |
| |
| return 0; |
| } |
| |
| long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, |
| unsigned long bitmap_size) |
| { |
| int i, j; |
| unsigned long m; |
| compat_ulong_t um; |
| unsigned long nr_compat_longs; |
| |
| /* align bitmap up to nearest compat_long_t boundary */ |
| bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); |
| |
| if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) |
| return -EFAULT; |
| |
| nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); |
| |
| for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { |
| m = *mask++; |
| |
| for (j = 0; j < sizeof(m)/sizeof(um); j++) { |
| um = m; |
| |
| /* |
| * We dont want to write past the end of the userspace |
| * bitmap. |
| */ |
| if (nr_compat_longs-- > 0) { |
| if (__put_user(um, umask)) |
| return -EFAULT; |
| } |
| |
| umask++; |
| m >>= 4*sizeof(um); |
| m >>= 4*sizeof(um); |
| } |
| } |
| |
| return 0; |
| } |
| |
| void |
| sigset_from_compat (sigset_t *set, compat_sigset_t *compat) |
| { |
| switch (_NSIG_WORDS) { |
| case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
| case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); |
| case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); |
| case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); |
| } |
| } |
| |
| asmlinkage long |
| compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, |
| struct compat_siginfo __user *uinfo, |
| struct compat_timespec __user *uts, compat_size_t sigsetsize) |
| { |
| compat_sigset_t s32; |
| sigset_t s; |
| int sig; |
| struct timespec t; |
| siginfo_t info; |
| long ret, timeout = 0; |
| |
| if (sigsetsize != sizeof(sigset_t)) |
| return -EINVAL; |
| |
| if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) |
| return -EFAULT; |
| sigset_from_compat(&s, &s32); |
| sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| signotset(&s); |
| |
| if (uts) { |
| if (get_compat_timespec (&t, uts)) |
| return -EFAULT; |
| if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 |
| || t.tv_sec < 0) |
| return -EINVAL; |
| } |
| |
| spin_lock_irq(¤t->sighand->siglock); |
| sig = dequeue_signal(current, &s, &info); |
| if (!sig) { |
| timeout = MAX_SCHEDULE_TIMEOUT; |
| if (uts) |
| timeout = timespec_to_jiffies(&t) |
| +(t.tv_sec || t.tv_nsec); |
| if (timeout) { |
| current->real_blocked = current->blocked; |
| sigandsets(¤t->blocked, ¤t->blocked, &s); |
| |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| timeout = schedule_timeout_interruptible(timeout); |
| |
| spin_lock_irq(¤t->sighand->siglock); |
| sig = dequeue_signal(current, &s, &info); |
| current->blocked = current->real_blocked; |
| siginitset(¤t->real_blocked, 0); |
| recalc_sigpending(); |
| } |
| } |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| if (sig) { |
| ret = sig; |
| if (uinfo) { |
| if (copy_siginfo_to_user32(uinfo, &info)) |
| ret = -EFAULT; |
| } |
| }else { |
| ret = timeout?-EINTR:-EAGAIN; |
| } |
| return ret; |
| |
| } |
| |
| #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
| |
| /* compat_time_t is a 32 bit "long" and needs to get converted. */ |
| |
| asmlinkage long compat_sys_time(compat_time_t __user * tloc) |
| { |
| compat_time_t i; |
| struct timeval tv; |
| |
| do_gettimeofday(&tv); |
| i = tv.tv_sec; |
| |
| if (tloc) { |
| if (put_user(i,tloc)) |
| i = -EFAULT; |
| } |
| return i; |
| } |
| |
| asmlinkage long compat_sys_stime(compat_time_t __user *tptr) |
| { |
| struct timespec tv; |
| int err; |
| |
| if (get_user(tv.tv_sec, tptr)) |
| return -EFAULT; |
| |
| tv.tv_nsec = 0; |
| |
| err = security_settime(&tv, NULL); |
| if (err) |
| return err; |
| |
| do_settimeofday(&tv); |
| return 0; |
| } |
| |
| #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ |
| |
| #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND |
| asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) |
| { |
| sigset_t newset; |
| compat_sigset_t newset32; |
| |
| /* XXX: Don't preclude handling different sized sigset_t's. */ |
| if (sigsetsize != sizeof(sigset_t)) |
| return -EINVAL; |
| |
| if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) |
| return -EFAULT; |
| sigset_from_compat(&newset, &newset32); |
| sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| |
| spin_lock_irq(¤t->sighand->siglock); |
| current->saved_sigmask = current->blocked; |
| current->blocked = newset; |
| recalc_sigpending(); |
| spin_unlock_irq(¤t->sighand->siglock); |
| |
| current->state = TASK_INTERRUPTIBLE; |
| schedule(); |
| set_thread_flag(TIF_RESTORE_SIGMASK); |
| return -ERESTARTNOHAND; |
| } |
| #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ |
| |
| asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) |
| { |
| struct timex txc; |
| int ret; |
| |
| memset(&txc, 0, sizeof(struct timex)); |
| |
| if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || |
| __get_user(txc.modes, &utp->modes) || |
| __get_user(txc.offset, &utp->offset) || |
| __get_user(txc.freq, &utp->freq) || |
| __get_user(txc.maxerror, &utp->maxerror) || |
| __get_user(txc.esterror, &utp->esterror) || |
| __get_user(txc.status, &utp->status) || |
| __get_user(txc.constant, &utp->constant) || |
| __get_user(txc.precision, &utp->precision) || |
| __get_user(txc.tolerance, &utp->tolerance) || |
| __get_user(txc.time.tv_sec, &utp->time.tv_sec) || |
| __get_user(txc.time.tv_usec, &utp->time.tv_usec) || |
| __get_user(txc.tick, &utp->tick) || |
| __get_user(txc.ppsfreq, &utp->ppsfreq) || |
| __get_user(txc.jitter, &utp->jitter) || |
| __get_user(txc.shift, &utp->shift) || |
| __get_user(txc.stabil, &utp->stabil) || |
| __get_user(txc.jitcnt, &utp->jitcnt) || |
| __get_user(txc.calcnt, &utp->calcnt) || |
| __get_user(txc.errcnt, &utp->errcnt) || |
| __get_user(txc.stbcnt, &utp->stbcnt)) |
| return -EFAULT; |
| |
| ret = do_adjtimex(&txc); |
| |
| if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || |
| __put_user(txc.modes, &utp->modes) || |
| __put_user(txc.offset, &utp->offset) || |
| __put_user(txc.freq, &utp->freq) || |
| __put_user(txc.maxerror, &utp->maxerror) || |
| __put_user(txc.esterror, &utp->esterror) || |
| __put_user(txc.status, &utp->status) || |
| __put_user(txc.constant, &utp->constant) || |
| __put_user(txc.precision, &utp->precision) || |
| __put_user(txc.tolerance, &utp->tolerance) || |
| __put_user(txc.time.tv_sec, &utp->time.tv_sec) || |
| __put_user(txc.time.tv_usec, &utp->time.tv_usec) || |
| __put_user(txc.tick, &utp->tick) || |
| __put_user(txc.ppsfreq, &utp->ppsfreq) || |
| __put_user(txc.jitter, &utp->jitter) || |
| __put_user(txc.shift, &utp->shift) || |
| __put_user(txc.stabil, &utp->stabil) || |
| __put_user(txc.jitcnt, &utp->jitcnt) || |
| __put_user(txc.calcnt, &utp->calcnt) || |
| __put_user(txc.errcnt, &utp->errcnt) || |
| __put_user(txc.stbcnt, &utp->stbcnt)) |
| ret = -EFAULT; |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_NUMA |
| asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, |
| compat_uptr_t __user *pages32, |
| const int __user *nodes, |
| int __user *status, |
| int flags) |
| { |
| const void __user * __user *pages; |
| int i; |
| |
| pages = compat_alloc_user_space(nr_pages * sizeof(void *)); |
| for (i = 0; i < nr_pages; i++) { |
| compat_uptr_t p; |
| |
| if (get_user(p, pages32 + i) || |
| put_user(compat_ptr(p), pages + i)) |
| return -EFAULT; |
| } |
| return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); |
| } |
| #endif |