@@ -147,6 +147,35 @@ static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags);
__timr; \
})
+#define __get_timespec(kts, uts) \
+ (__get_user((kts)->tv_sec, &(uts)->tv_sec) || \
+ __get_user((kts)->tv_nsec, &(uts)->tv_nsec))
+
+#define __put_timespec(kts, uts) \
+ (__put_user((kts)->tv_sec, &(uts)->tv_sec) || \
+ __put_user((kts)->tv_nsec, &(uts)->tv_nsec))
+
+#define get_timespec(kts, uts) \
+ ((access_ok(VERIFY_READ, (uts), sizeof(*(uts))) || \
+ __get_timespec((kts), (uts))) ? \
+ -EFAULT : 0)
+
+#define put_timespec(kts, uts) \
+ ((access_ok(VERIFY_WRITE, (uts), sizeof(*(uts))) || \
+ __put_timespec((kts), (uts))) ? \
+ -EFAULT : 0)
+
+#define get_itimerspec(kit, uit) \
+ ((access_ok(VERIFY_READ, (uit), sizeof(*(uit))) || \
+ __get_timespec(&(kit)->it_interval, &(uit)->it_interval) || \
+ __get_timespec(&(kit)->it_value, &(uit)->it_value)))
+
+#define put_itimerspec(kit, uit) \
+ ((access_ok(VERIFY_WRITE, (uit), sizeof(*(uit))) || \
+ __put_timespec(&(kit)->it_interval, &(uit)->it_interval) || \
+ __put_timespec(&(kit)->it_value, &(uit)->it_value)) ? \
+ -EFAULT : 0)
+
static int hash(struct signal_struct *sig, unsigned int nr)
{
return hash_32(hash32_ptr(sig) ^ nr, HASH_BITS(posix_timers_hashtable));
These are new helper functions that convert between a user timespec/ itimerspec and a kernel timespec64/itimerspec64 structure. These macros can change the types underneath from both ends and it will work efficiently on both 32-bit and 64-bit that can avoid the CONFIG_64BIT macro in syscall functions, and also it can make the syscall functions more simple. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> --- kernel/time/posix-timers.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)