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implement clock_settime

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This commit is contained in:
Ashwin Naren
2026-02-15 22:05:10 -08:00
parent ba0ff25b20
commit 6e0d5ef43a
4 changed files with 31 additions and 1 deletions
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2
etc/syscalls_linux_aarch64.md
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@@ -112,7 +112,7 @@
| 0x6d (109) | timer_getoverrun | (timer_t timer_id) | __arm64_sys_timer_getoverrun | false |
| 0x6e (110) | timer_settime | (timer_t timer_id, int flags, const struct __kernel_itimerspec *new_setting, struct __kernel_itimerspec *old_setting) | __arm64_sys_timer_settime | false |
| 0x6f (111) | timer_delete | (timer_t timer_id) | __arm64_sys_timer_delete | false |
| 0x70 (112) | clock_settime | (const clockid_t which_clock, const struct __kernel_timespec *tp) | __arm64_sys_clock_settime | false |
| 0x70 (112) | clock_settime | (const clockid_t which_clock, const struct __kernel_timespec *tp) | __arm64_sys_clock_settime | true |
| 0x71 (113) | clock_gettime | (const clockid_t which_clock, struct __kernel_timespec *tp) | __arm64_sys_clock_gettime | true |
| 0x72 (114) | clock_getres | (const clockid_t which_clock, struct __kernel_timespec *tp) | __arm64_sys_clock_getres | false |
| 0x73 (115) | clock_nanosleep | (const clockid_t which_clock, int flags, const struct __kernel_timespec *rqtp, struct __kernel_timespec *rmtp) | __arm64_sys_clock_nanosleep | partially |

2
src/arch/arm64/exceptions/syscall.rs
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@@ -2,6 +2,7 @@ use crate::{
arch::{Arch, ArchImpl},
clock::{
gettime::sys_clock_gettime,
settime::sys_clock_settime,
timeofday::{sys_gettimeofday, sys_settimeofday},
},
fs::{
@@ -419,6 +420,7 @@ pub async fn handle_syscall() {
}
0x63 => sys_set_robust_list(TUA::from_value(arg1 as _), arg2 as _).await,
0x65 => sys_nanosleep(TUA::from_value(arg1 as _), TUA::from_value(arg2 as _)).await,
0x70 => sys_clock_settime(arg1 as _, TUA::from_value(arg2 as _)).await,
0x71 => sys_clock_gettime(arg1 as _, TUA::from_value(arg2 as _)).await,
0x73 => {
sys_clock_nanosleep(

1
src/clock/mod.rs
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@@ -1,5 +1,6 @@
pub mod gettime;
pub mod realtime;
pub mod settime;
pub mod timeofday;
pub mod timespec;

27
src/clock/settime.rs Normal file
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@@ -0,0 +1,27 @@
use crate::clock::ClockId;
use crate::clock::realtime::set_date;
use crate::clock::timespec::TimeSpec;
use crate::memory::uaccess::copy_from_user;
use libkernel::error::KernelError;
use libkernel::memory::address::TUA;
pub async fn sys_clock_settime(
clockid: i32,
time_spec: TUA<TimeSpec>,
) -> libkernel::error::Result<usize> {
let time_spec = copy_from_user(time_spec).await?;
if time_spec.tv_sec < 0 || time_spec.tv_nsec >= 1_000_000_000 {
return Err(KernelError::InvalidValue);
}
match ClockId::try_from(clockid).map_err(|_| KernelError::InvalidValue)? {
ClockId::Monotonic | ClockId::MonotonicCoarse | ClockId::MonotonicRaw => {
// Monotonic clock cannot be set
Err(KernelError::InvalidValue)
}
ClockId::Realtime => {
set_date(time_spec.into());
Ok(0)
}
_ => Err(KernelError::NotSupported),
}
}