From 6a029c340ab21dc88bf320eaf92c8dbecad23652 Mon Sep 17 00:00:00 2001
From: Matthew Leach <dev@mattleach.net>
Date: Tue, 25 Nov 2025 16:43:37 +0000
Subject: [PATCH] syscall: gettimeofday: impement

Provide a dummy implementation of sys_gettimeofday
---
 etc/syscalls_linux_aarch64.md        |  2 +-
 src/arch/arm64/exceptions/syscall.rs |  3 ++-
 src/clock/mod.rs                     |  1 +
 src/clock/timeofday.rs               | 31 ++++++++++++++++++++++++++++
 4 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 src/clock/timeofday.rs

diff --git a/etc/syscalls_linux_aarch64.md b/etc/syscalls_linux_aarch64.md
index d4a83bd..b7e5cf0 100644
--- a/etc/syscalls_linux_aarch64.md
+++ b/etc/syscalls_linux_aarch64.md
@@ -169,7 +169,7 @@
 | 0xa6 (166)  | umask                   | (int mask)                                                                                                                                 | __arm64_sys_umask                   | true        |
 | 0xa7 (167)  | prctl                   | (int option, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5)                                               | __arm64_sys_prctl                   | false       |
 | 0xa8 (168)  | getcpu                  | (unsigned *cpup, unsigned *nodep, struct getcpu_cache *unused)                                                                             | __arm64_sys_getcpu                  | false       |
-| 0xa9 (169)  | gettimeofday            | (struct __kernel_old_timeval *tv, struct timezone *tz)                                                                                     | __arm64_sys_gettimeofday            | false       |
+| 0xa9 (169)  | gettimeofday            | (struct __kernel_old_timeval *tv, struct timezone *tz)                                                                                     | __arm64_sys_gettimeofday            | dummy       |
 | 0xaa (170)  | settimeofday            | (struct __kernel_old_timeval *tv, struct timezone *tz)                                                                                     | __arm64_sys_settimeofday            | false       |
 | 0xab (171)  | adjtimex                | (struct __kernel_timex *txc_p)                                                                                                             | __arm64_sys_adjtimex                | false       |
 | 0xac (172)  | getpid                  | ()                                                                                                                                         | __arm64_sys_getpid                  | true        |
diff --git a/src/arch/arm64/exceptions/syscall.rs b/src/arch/arm64/exceptions/syscall.rs
index 7be3fdf..bce7050 100644
--- a/src/arch/arm64/exceptions/syscall.rs
+++ b/src/arch/arm64/exceptions/syscall.rs
@@ -1,7 +1,7 @@
 use crate::kernel::power::sys_reboot;
 use crate::{
     arch::{Arch, ArchImpl},
-    clock::gettime::sys_clock_gettime,
+    clock::{gettime::sys_clock_gettime, timeofday::sys_gettimeofday},
     fs::{
         dir::sys_getdents64,
         pipe::sys_pipe2,
@@ -210,6 +210,7 @@ pub async fn handle_syscall() {
         0x9b => sys_getpgid(arg1 as _),
         0xa0 => sys_uname(TUA::from_value(arg1 as _)).await,
         0xa6 => sys_umask(arg1 as _).map_err(|e| match e {}),
+        0xa9 => sys_gettimeofday(TUA::from_value(arg1 as _), TUA::from_value(arg2 as _)).await,
         0xac => sys_getpid().map_err(|e| match e {}),
         0xad => sys_getppid().map_err(|e| match e {}),
         0xae => sys_getuid().map_err(|e| match e {}),
diff --git a/src/clock/mod.rs b/src/clock/mod.rs
index 605a70b..58ef00d 100644
--- a/src/clock/mod.rs
+++ b/src/clock/mod.rs
@@ -1,3 +1,4 @@
 pub mod gettime;
 pub mod realtime;
+pub mod timeofday;
 pub mod timespec;
diff --git a/src/clock/timeofday.rs b/src/clock/timeofday.rs
new file mode 100644
index 0000000..415cd35
--- /dev/null
+++ b/src/clock/timeofday.rs
@@ -0,0 +1,31 @@
+use super::timespec::TimeSpec;
+use crate::memory::uaccess::{UserCopyable, copy_to_user};
+use core::time::Duration;
+use libkernel::{error::Result, memory::address::TUA};
+
+#[derive(Copy, Clone)]
+pub struct TimeZone {
+    _tz_minuteswest: i32,
+    _tz_dsttime: i32,
+}
+
+unsafe impl UserCopyable for TimeZone {}
+
+pub async fn sys_gettimeofday(tv: TUA<TimeSpec>, tz: TUA<TimeZone>) -> Result<usize> {
+    let time: TimeSpec = Duration::new(0, 0).into();
+
+    copy_to_user(tv, time).await?;
+
+    if !tz.is_null() {
+        copy_to_user(
+            tz,
+            TimeZone {
+                _tz_minuteswest: 0,
+                _tz_dsttime: 0,
+            },
+        )
+        .await?;
+    }
+
+    Ok(0)
+}