[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/kernel/compat.c b/ap/os/linux/linux-3.4.x/kernel/compat.c
new file mode 100644
index 0000000..d2c67aa
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/kernel/compat.c
@@ -0,0 +1,1245 @@
+/*
+ * 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/export.h>
+#include <linux/migrate.h>
+#include <linux/posix-timers.h>
+#include <linux/times.h>
+#include <linux/ptrace.h>
+#include <linux/gfp.h>
+
+#include <asm/uaccess.h>
+
+/*
+ * Get/set struct timeval with struct timespec on the native side
+ */
+static int compat_get_timeval_convert(struct timespec *o,
+ struct compat_timeval __user *i)
+{
+ long usec;
+
+ if (get_user(o->tv_sec, &i->tv_sec) ||
+ get_user(usec, &i->tv_usec))
+ return -EFAULT;
+ o->tv_nsec = usec * 1000;
+ return 0;
+}
+
+static int compat_put_timeval_convert(struct compat_timeval __user *o,
+ struct timeval *i)
+{
+ return (put_user(i->tv_sec, &o->tv_sec) ||
+ put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0;
+}
+
+static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp)
+{
+ 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;
+
+ return 0;
+}
+
+static int compat_put_timex(struct compat_timex __user *utp, struct timex *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) ||
+ __put_user(txc->tai, &utp->tai))
+ return -EFAULT;
+ return 0;
+}
+
+asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
+ struct timezone __user *tz)
+{
+ if (tv) {
+ struct timeval ktv;
+ do_gettimeofday(&ktv);
+ if (compat_put_timeval_convert(tv, &ktv))
+ return -EFAULT;
+ }
+ if (tz) {
+ if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
+ struct timezone __user *tz)
+{
+ struct timespec kts;
+ struct timezone ktz;
+
+ if (tv) {
+ if (compat_get_timeval_convert(&kts, tv))
+ return -EFAULT;
+ }
+ if (tz) {
+ if (copy_from_user(&ktz, tz, sizeof(ktz)))
+ return -EFAULT;
+ }
+
+ return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
+}
+
+int get_compat_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
+{
+ return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
+ __get_user(tv->tv_sec, &ctv->tv_sec) ||
+ __get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
+}
+EXPORT_SYMBOL_GPL(get_compat_timeval);
+
+int put_compat_timeval(const struct timeval *tv, struct compat_timeval __user *ctv)
+{
+ return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) ||
+ __put_user(tv->tv_sec, &ctv->tv_sec) ||
+ __put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
+}
+EXPORT_SYMBOL_GPL(put_compat_timeval);
+
+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;
+}
+EXPORT_SYMBOL_GPL(get_compat_timespec);
+
+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;
+}
+EXPORT_SYMBOL_GPL(put_compat_timespec);
+
+int compat_get_timeval(struct timeval *tv, const void __user *utv)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0;
+ else
+ return get_compat_timeval(tv, utv);
+}
+EXPORT_SYMBOL_GPL(compat_get_timeval);
+
+int compat_put_timeval(const struct timeval *tv, void __user *utv)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0;
+ else
+ return put_compat_timeval(tv, utv);
+}
+EXPORT_SYMBOL_GPL(compat_put_timeval);
+
+int compat_get_timespec(struct timespec *ts, const void __user *uts)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0;
+ else
+ return get_compat_timespec(ts, uts);
+}
+EXPORT_SYMBOL_GPL(compat_get_timespec);
+
+int compat_put_timespec(const struct timespec *ts, void __user *uts)
+{
+ if (COMPAT_USE_64BIT_TIME)
+ return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0;
+ else
+ return put_compat_timespec(ts, uts);
+}
+EXPORT_SYMBOL_GPL(compat_put_timespec);
+
+static long compat_nanosleep_restart(struct restart_block *restart)
+{
+ struct compat_timespec __user *rmtp;
+ struct timespec rmt;
+ mm_segment_t oldfs;
+ long ret;
+
+ restart->nanosleep.rmtp = (struct timespec __user *) &rmt;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = hrtimer_nanosleep_restart(restart);
+ set_fs(oldfs);
+
+ if (ret) {
+ rmtp = restart->nanosleep.compat_rmtp;
+
+ if (rmtp && put_compat_timespec(&rmt, rmtp))
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
+asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
+ struct compat_timespec __user *rmtp)
+{
+ struct timespec tu, rmt;
+ mm_segment_t oldfs;
+ long ret;
+
+ if (get_compat_timespec(&tu, rqtp))
+ return -EFAULT;
+
+ if (!timespec_valid(&tu))
+ return -EINVAL;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = hrtimer_nanosleep(&tu,
+ rmtp ? (struct timespec __user *)&rmt : NULL,
+ HRTIMER_MODE_REL, CLOCK_MONOTONIC);
+ set_fs(oldfs);
+
+ if (ret) {
+ struct restart_block *restart
+ = ¤t_thread_info()->restart_block;
+
+ restart->fn = compat_nanosleep_restart;
+ restart->nanosleep.compat_rmtp = rmtp;
+
+ if (rmtp && put_compat_timespec(&rmt, rmtp))
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
+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;
+}
+
+static compat_clock_t clock_t_to_compat_clock_t(clock_t x)
+{
+ return compat_jiffies_to_clock_t(clock_t_to_jiffies(x));
+}
+
+asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
+{
+ if (tbuf) {
+ struct tms tms;
+ struct compat_tms tmp;
+
+ do_sys_times(&tms);
+ /* Convert our struct tms to the compat version. */
+ tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime);
+ tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime);
+ tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime);
+ tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime);
+ if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
+ return -EFAULT;
+ }
+ force_successful_syscall_return();
+ return compat_jiffies_to_clock_t(jiffies);
+}
+
+#ifdef __ARCH_WANT_SYS_SIGPENDING
+
+/*
+ * 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;
+}
+
+#endif
+
+#ifdef __ARCH_WANT_SYS_SIGPROCMASK
+
+/*
+ * sys_sigprocmask SIG_SETMASK sets the first (compat) word of the
+ * blocked set of signals to the supplied signal set
+ */
+static inline void compat_sig_setmask(sigset_t *blocked, compat_sigset_word set)
+{
+ memcpy(blocked->sig, &set, sizeof(set));
+}
+
+asmlinkage long compat_sys_sigprocmask(int how,
+ compat_old_sigset_t __user *nset,
+ compat_old_sigset_t __user *oset)
+{
+ old_sigset_t old_set, new_set;
+ sigset_t new_blocked;
+
+ old_set = current->blocked.sig[0];
+
+ if (nset) {
+ if (get_user(new_set, nset))
+ return -EFAULT;
+ new_set &= ~(sigmask(SIGKILL) | sigmask(SIGSTOP));
+
+ new_blocked = current->blocked;
+
+ switch (how) {
+ case SIG_BLOCK:
+ sigaddsetmask(&new_blocked, new_set);
+ break;
+ case SIG_UNBLOCK:
+ sigdelsetmask(&new_blocked, new_set);
+ break;
+ case SIG_SETMASK:
+ compat_sig_setmask(&new_blocked, new_set);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ set_current_blocked(&new_blocked);
+ }
+
+ if (oset) {
+ if (put_user(old_set, oset))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+#endif
+
+asmlinkage long compat_sys_setrlimit(unsigned int resource,
+ struct compat_rlimit __user *rlim)
+{
+ struct rlimit r;
+
+ 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;
+ return do_prlimit(current, resource, &r, NULL);
+}
+
+#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;
+
+ ret = do_prlimit(current, resource, NULL, &r);
+ 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, struct cpumask *new_mask)
+{
+ unsigned long *k;
+
+ if (len < cpumask_size())
+ memset(new_mask, 0, cpumask_size());
+ else if (len > cpumask_size())
+ len = cpumask_size();
+
+ k = cpumask_bits(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_var_t new_mask;
+ int retval;
+
+ if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
+ return -ENOMEM;
+
+ retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
+ if (retval)
+ goto out;
+
+ retval = sched_setaffinity(pid, new_mask);
+out:
+ free_cpumask_var(new_mask);
+ return retval;
+}
+
+asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
+ compat_ulong_t __user *user_mask_ptr)
+{
+ int ret;
+ cpumask_var_t mask;
+
+ if ((len * BITS_PER_BYTE) < nr_cpu_ids)
+ return -EINVAL;
+ if (len & (sizeof(compat_ulong_t)-1))
+ return -EINVAL;
+
+ if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+ return -ENOMEM;
+
+ ret = sched_getaffinity(pid, mask);
+ if (ret == 0) {
+ size_t retlen = min_t(size_t, len, cpumask_size());
+
+ if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8))
+ ret = -EFAULT;
+ else
+ ret = retlen;
+ }
+ free_cpumask_var(mask);
+
+ return ret;
+}
+
+int get_compat_itimerspec(struct itimerspec *dst,
+ const 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;
+}
+
+int put_compat_itimerspec(struct compat_itimerspec __user *dst,
+ const 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_adjtime(clockid_t which_clock,
+ struct compat_timex __user *utp)
+{
+ struct timex txc;
+ mm_segment_t oldfs;
+ int err, ret;
+
+ err = compat_get_timex(&txc, utp);
+ if (err)
+ return err;
+
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc);
+ set_fs(oldfs);
+
+ err = compat_put_timex(utp, &txc);
+ if (err)
+ return err;
+
+ return ret;
+}
+
+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 = restart->nanosleep.compat_rmtp;
+
+ restart->nanosleep.rmtp = (struct timespec __user *) &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->nanosleep.compat_rmtp = 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->nanosleep.compat_rmtp = 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, const 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 );
+ }
+}
+EXPORT_SYMBOL_GPL(sigset_from_compat);
+
+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;
+ struct timespec t;
+ siginfo_t info;
+ long ret;
+
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
+ return -EFAULT;
+ sigset_from_compat(&s, &s32);
+
+ if (uts) {
+ if (get_compat_timespec(&t, uts))
+ return -EFAULT;
+ }
+
+ ret = do_sigtimedwait(&s, &info, uts ? &t : NULL);
+
+ if (ret > 0 && uinfo) {
+ if (copy_siginfo_to_user32(uinfo, &info))
+ ret = -EFAULT;
+ }
+
+ return ret;
+
+}
+
+asmlinkage long
+compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
+ struct compat_siginfo __user *uinfo)
+{
+ siginfo_t info;
+
+ if (copy_siginfo_from_user32(&info, uinfo))
+ return -EFAULT;
+ return do_rt_tgsigqueueinfo(tgid, pid, sig, &info);
+}
+
+#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))
+ return -EFAULT;
+ }
+ force_successful_syscall_return();
+ 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));
+
+ current->saved_sigmask = current->blocked;
+ set_current_blocked(&newset);
+
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_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 err, ret;
+
+ err = compat_get_timex(&txc, utp);
+ if (err)
+ return err;
+
+ ret = do_adjtimex(&txc);
+
+ err = compat_put_timex(utp, &txc);
+ if (err)
+ return err;
+
+ 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);
+}
+
+asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
+ compat_ulong_t maxnode,
+ const compat_ulong_t __user *old_nodes,
+ const compat_ulong_t __user *new_nodes)
+{
+ unsigned long __user *old = NULL;
+ unsigned long __user *new = NULL;
+ nodemask_t tmp_mask;
+ unsigned long nr_bits;
+ unsigned long size;
+
+ nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
+ size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
+ if (old_nodes) {
+ if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
+ return -EFAULT;
+ old = compat_alloc_user_space(new_nodes ? size * 2 : size);
+ if (new_nodes)
+ new = old + size / sizeof(unsigned long);
+ if (copy_to_user(old, nodes_addr(tmp_mask), size))
+ return -EFAULT;
+ }
+ if (new_nodes) {
+ if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
+ return -EFAULT;
+ if (new == NULL)
+ new = compat_alloc_user_space(size);
+ if (copy_to_user(new, nodes_addr(tmp_mask), size))
+ return -EFAULT;
+ }
+ return sys_migrate_pages(pid, nr_bits + 1, old, new);
+}
+#endif
+
+struct compat_sysinfo {
+ s32 uptime;
+ u32 loads[3];
+ u32 totalram;
+ u32 freeram;
+ u32 sharedram;
+ u32 bufferram;
+ u32 totalswap;
+ u32 freeswap;
+ u16 procs;
+ u16 pad;
+ u32 totalhigh;
+ u32 freehigh;
+ u32 mem_unit;
+ char _f[20-2*sizeof(u32)-sizeof(int)];
+};
+
+asmlinkage long
+compat_sys_sysinfo(struct compat_sysinfo __user *info)
+{
+ struct sysinfo s;
+
+ do_sysinfo(&s);
+
+ /* Check to see if any memory value is too large for 32-bit and scale
+ * down if needed
+ */
+ if ((s.totalram >> 32) || (s.totalswap >> 32)) {
+ int bitcount = 0;
+
+ while (s.mem_unit < PAGE_SIZE) {
+ s.mem_unit <<= 1;
+ bitcount++;
+ }
+
+ s.totalram >>= bitcount;
+ s.freeram >>= bitcount;
+ s.sharedram >>= bitcount;
+ s.bufferram >>= bitcount;
+ s.totalswap >>= bitcount;
+ s.freeswap >>= bitcount;
+ s.totalhigh >>= bitcount;
+ s.freehigh >>= bitcount;
+ }
+
+ if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
+ __put_user (s.uptime, &info->uptime) ||
+ __put_user (s.loads[0], &info->loads[0]) ||
+ __put_user (s.loads[1], &info->loads[1]) ||
+ __put_user (s.loads[2], &info->loads[2]) ||
+ __put_user (s.totalram, &info->totalram) ||
+ __put_user (s.freeram, &info->freeram) ||
+ __put_user (s.sharedram, &info->sharedram) ||
+ __put_user (s.bufferram, &info->bufferram) ||
+ __put_user (s.totalswap, &info->totalswap) ||
+ __put_user (s.freeswap, &info->freeswap) ||
+ __put_user (s.procs, &info->procs) ||
+ __put_user (s.totalhigh, &info->totalhigh) ||
+ __put_user (s.freehigh, &info->freehigh) ||
+ __put_user (s.mem_unit, &info->mem_unit))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * Allocate user-space memory for the duration of a single system call,
+ * in order to marshall parameters inside a compat thunk.
+ */
+void __user *compat_alloc_user_space(unsigned long len)
+{
+ void __user *ptr;
+
+ /* If len would occupy more than half of the entire compat space... */
+ if (unlikely(len > (((compat_uptr_t)~0) >> 1)))
+ return NULL;
+
+ ptr = arch_compat_alloc_user_space(len);
+
+ if (unlikely(!access_ok(VERIFY_WRITE, ptr, len)))
+ return NULL;
+
+ return ptr;
+}
+EXPORT_SYMBOL_GPL(compat_alloc_user_space);