From 9c7fd8fef5f6f52c231ea805a6189b4a18c4d6d0 Mon Sep 17 00:00:00 2001
From: Chen Chengjun <chenchengjun.ccj@antgroup.com>
Date: Fri, 16 Aug 2024 13:16:54 +0800
Subject: [PATCH] Add dummy msync

---
 kernel/aster-nix/src/syscall/arch/x86.rs | 2 ++
 kernel/aster-nix/src/syscall/mod.rs      | 1 +
 kernel/aster-nix/src/syscall/msync.rs    | 9 +++++++++
 3 files changed, 12 insertions(+)
 create mode 100644 kernel/aster-nix/src/syscall/msync.rs

diff --git a/kernel/aster-nix/src/syscall/arch/x86.rs b/kernel/aster-nix/src/syscall/arch/x86.rs
index 249343a7e..fddd71107 100644
--- a/kernel/aster-nix/src/syscall/arch/x86.rs
+++ b/kernel/aster-nix/src/syscall/arch/x86.rs
@@ -60,6 +60,7 @@ use crate::syscall::{
     mmap::sys_mmap,
     mount::sys_mount,
     mprotect::sys_mprotect,
+    msync::sys_msync,
     munmap::sys_munmap,
     nanosleep::{sys_clock_nanosleep, sys_nanosleep},
     open::{sys_creat, sys_open, sys_openat},
@@ -154,6 +155,7 @@ impl_syscall_nums_and_dispatch_fn! {
     SYS_ACCESS = 21            => sys_access(args[..2]);
     SYS_PIPE = 22              => sys_pipe(args[..1]);
     SYS_SELECT = 23            => sys_select(args[..5]);
+    SYS_MSYNC = 26             => sys_msync(args[..3]);
     SYS_SCHED_YIELD = 24       => sys_sched_yield(args[..0]);
     SYS_MADVISE = 28           => sys_madvise(args[..3]);
     SYS_DUP = 32               => sys_dup(args[..1]);
diff --git a/kernel/aster-nix/src/syscall/mod.rs b/kernel/aster-nix/src/syscall/mod.rs
index ce21d559f..42d68c229 100644
--- a/kernel/aster-nix/src/syscall/mod.rs
+++ b/kernel/aster-nix/src/syscall/mod.rs
@@ -67,6 +67,7 @@ mod mknod;
 mod mmap;
 mod mount;
 mod mprotect;
+mod msync;
 mod munmap;
 mod nanosleep;
 mod open;
diff --git a/kernel/aster-nix/src/syscall/msync.rs b/kernel/aster-nix/src/syscall/msync.rs
new file mode 100644
index 000000000..b0ed49179
--- /dev/null
+++ b/kernel/aster-nix/src/syscall/msync.rs
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::SyscallReturn;
+use crate::prelude::*;
+
+pub fn sys_msync(_start: Vaddr, _size: usize, _flag: i32, _ctx: &Context) -> Result<SyscallReturn> {
+    // TODO: implement real `msync`.
+    Ok(SyscallReturn::Return(0))
+}