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Diffstat (limited to 'kernel/time/time.c')
-rw-r--r--kernel/time/time.c106
1 files changed, 105 insertions, 1 deletions
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 49c73c6ed648..7c89e437c4d7 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -39,6 +39,7 @@
#include <linux/ptrace.h>
#include <linux/uaccess.h>
+#include <linux/compat.h>
#include <asm/unistd.h>
#include <generated/timeconst.h>
@@ -99,6 +100,47 @@ SYSCALL_DEFINE1(stime, time_t __user *, tptr)
#endif /* __ARCH_WANT_SYS_TIME */
+#ifdef CONFIG_COMPAT
+#ifdef __ARCH_WANT_COMPAT_SYS_TIME
+
+/* compat_time_t is a 32 bit "long" and needs to get converted. */
+COMPAT_SYSCALL_DEFINE1(time, compat_time_t __user *, tloc)
+{
+ struct timeval tv;
+ compat_time_t i;
+
+ do_gettimeofday(&tv);
+ i = tv.tv_sec;
+
+ if (tloc) {
+ if (put_user(i,tloc))
+ return -EFAULT;
+ }
+ force_successful_syscall_return();
+ return i;
+}
+
+COMPAT_SYSCALL_DEFINE1(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 */
+#endif
+
SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv,
struct timezone __user *, tz)
{
@@ -215,6 +257,47 @@ SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv,
return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
}
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE2(gettimeofday, struct compat_timeval __user *, tv,
+ struct timezone __user *, tz)
+{
+ if (tv) {
+ struct timeval ktv;
+
+ do_gettimeofday(&ktv);
+ if (compat_put_timeval(&ktv, tv))
+ return -EFAULT;
+ }
+ if (tz) {
+ if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+COMPAT_SYSCALL_DEFINE2(settimeofday, struct compat_timeval __user *, tv,
+ struct timezone __user *, tz)
+{
+ struct timespec64 new_ts;
+ struct timeval user_tv;
+ struct timezone new_tz;
+
+ if (tv) {
+ if (compat_get_timeval(&user_tv, tv))
+ return -EFAULT;
+ new_ts.tv_sec = user_tv.tv_sec;
+ new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC;
+ }
+ if (tz) {
+ if (copy_from_user(&new_tz, tz, sizeof(*tz)))
+ return -EFAULT;
+ }
+
+ return do_sys_settimeofday64(tv ? &new_ts : NULL, tz ? &new_tz : NULL);
+}
+#endif
+
SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p)
{
struct timex txc; /* Local copy of parameter */
@@ -224,12 +307,33 @@ SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p)
* structure. But bear in mind that the structures
* may change
*/
- if(copy_from_user(&txc, txc_p, sizeof(struct timex)))
+ if (copy_from_user(&txc, txc_p, sizeof(struct timex)))
return -EFAULT;
ret = do_adjtimex(&txc);
return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret;
}
+#ifdef CONFIG_COMPAT
+
+COMPAT_SYSCALL_DEFINE1(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;
+}
+#endif
+
/*
* Convert jiffies to milliseconds and back.
*