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[PATCH 2/2] linux-user: Add support for 'rt_sigtimedwait_time64()' and '
From: |
Filip Bozuta |
Subject: |
[PATCH 2/2] linux-user: Add support for 'rt_sigtimedwait_time64()' and 'sched_rr_get_interval_time64()' |
Date: |
Sun, 26 Jul 2020 00:04:42 +0200 |
This patch implements functionality for following time64 syscalls:
*rt_sigtimedwait_time64()
This is a year 2038 safe variant of syscall:
int rt_sigtimedwait(const sigset_t *set, siginfo_t *info,
const struct timespec *timeout, size_t sigsetsize)
--synchronously wait for queued signals--
man page: https://man7.org/linux/man-pages/man2/rt_sigtimedwait.2.html
*sched_rr_get_interval_time64()
This is a year 2038 safe variant of syscall:
int sched_rr_get_interval(pid_t pid, struct timespec *tp)
--get the SCHED_RR interval for the named process--
man page: https://man7.org/linux/man-pages/man2/sched_rr_get_interval.2.html
Implementation notes:
These syscalls were implemented in similar ways like
'rt_sigtimedwait()' and 'sched_rr_get_interval()' except
that functions 'target_to_host_timespec64()' and
'host_to_target_timespec64()' were used to convert values
of 'struct timespec' between host and target.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
---
linux-user/syscall.c | 53 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 0de11e4245..efd6157350 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8831,6 +8831,48 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
}
}
return ret;
+#endif
+#ifdef TARGET_NR_rt_sigtimedwait_time64
+ case TARGET_NR_rt_sigtimedwait_time64:
+ {
+ sigset_t set;
+ struct timespec uts, *puts;
+ siginfo_t uinfo;
+
+ if (arg4 != sizeof(target_sigset_t)) {
+ return -TARGET_EINVAL;
+ }
+
+ p = lock_user(VERIFY_READ, arg1, sizeof(target_sigset_t), 1);
+ if (!p) {
+ return -TARGET_EFAULT;
+ }
+ target_to_host_sigset(&set, p);
+ unlock_user(p, arg1, 0);
+ if (arg3) {
+ puts = &uts;
+ if (target_to_host_timespec64(puts, arg3)) {
+ return -TARGET_EFAULT;
+ }
+ } else {
+ puts = NULL;
+ }
+ ret = get_errno(safe_rt_sigtimedwait(&set, &uinfo, puts,
+ SIGSET_T_SIZE));
+ if (!is_error(ret)) {
+ if (arg2) {
+ p = lock_user(VERIFY_WRITE, arg2,
+ sizeof(target_siginfo_t), 0);
+ if (!p) {
+ return -TARGET_EFAULT;
+ }
+ host_to_target_siginfo(p, &uinfo);
+ unlock_user(p, arg2, sizeof(target_siginfo_t));
+ }
+ ret = host_to_target_signal(ret);
+ }
+ }
+ return ret;
#endif
case TARGET_NR_rt_sigqueueinfo:
{
@@ -10353,6 +10395,17 @@ static abi_long do_syscall1(void *cpu_env, int num,
abi_long arg1,
}
return ret;
#endif
+#ifdef TARGET_NR_sched_rr_get_interval_time64
+ case TARGET_NR_sched_rr_get_interval_time64:
+ {
+ struct timespec ts;
+ ret = get_errno(sched_rr_get_interval(arg1, &ts));
+ if (!is_error(ret)) {
+ ret = host_to_target_timespec64(arg2, &ts);
+ }
+ }
+ return ret;
+#endif
#if defined(TARGET_NR_nanosleep)
case TARGET_NR_nanosleep:
{
--
2.25.1