diff options
Diffstat (limited to 'kernel/compat.c')
| -rw-r--r-- | kernel/compat.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index 126dee9530aa..b4fbd838cd77 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -22,9 +22,12 @@ #include <linux/security.h> #include <linux/timex.h> #include <linux/migrate.h> +#include <linux/posix-timers.h> #include <asm/uaccess.h> +extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); + int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) { return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || @@ -601,6 +604,30 @@ long compat_sys_clock_getres(clockid_t which_clock, 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) @@ -608,6 +635,7 @@ long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, long err; mm_segment_t oldfs; struct timespec in, out; + struct restart_block *restart; if (get_compat_timespec(&in, rqtp)) return -EFAULT; @@ -618,9 +646,16 @@ long compat_sys_clock_nanosleep(clockid_t which_clock, int 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; } |