diff --git a/kernel/aster-nix/src/syscall/accept.rs b/kernel/aster-nix/src/syscall/accept.rs
index 413f55d33..9c3734cd1 100644
--- a/kernel/aster-nix/src/syscall/accept.rs
+++ b/kernel/aster-nix/src/syscall/accept.rs
@@ -14,11 +14,11 @@ pub fn sys_accept(
     sockfd: FileDesc,
     sockaddr_ptr: Vaddr,
     addrlen_ptr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!("sockfd = {sockfd}, sockaddr_ptr = 0x{sockaddr_ptr:x}, addrlen_ptr = 0x{addrlen_ptr:x}");
 
-    let fd = do_accept(sockfd, sockaddr_ptr, addrlen_ptr, Flags::empty())?;
+    let fd = do_accept(sockfd, sockaddr_ptr, addrlen_ptr, Flags::empty(), ctx)?;
     Ok(SyscallReturn::Return(fd as _))
 }
 
@@ -27,7 +27,7 @@ pub fn sys_accept4(
     sockaddr_ptr: Vaddr,
     addrlen_ptr: Vaddr,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     trace!("raw flags = 0x{:x}", flags);
     let flags = Flags::from_bits_truncate(flags);
@@ -36,7 +36,7 @@ pub fn sys_accept4(
         sockfd, sockaddr_ptr, addrlen_ptr, flags
     );
 
-    let fd = do_accept(sockfd, sockaddr_ptr, addrlen_ptr, flags)?;
+    let fd = do_accept(sockfd, sockaddr_ptr, addrlen_ptr, flags, ctx)?;
     Ok(SyscallReturn::Return(fd as _))
 }
 
@@ -45,6 +45,7 @@ fn do_accept(
     sockaddr_ptr: Vaddr,
     addrlen_ptr: Vaddr,
     flags: Flags,
+    ctx: &Context,
 ) -> Result<FileDesc> {
     let (connected_socket, socket_addr) = {
         let socket = get_socket_from_fd(sockfd)?;
@@ -66,8 +67,7 @@ fn do_accept(
     }
 
     let fd = {
-        let current = current!();
-        let mut file_table = current.file_table().lock();
+        let mut file_table = ctx.process.file_table().lock();
         file_table.insert(connected_socket, fd_flags)
     };
 
diff --git a/kernel/aster-nix/src/syscall/access.rs b/kernel/aster-nix/src/syscall/access.rs
index 5ed0c8534..c0889bebe 100644
--- a/kernel/aster-nix/src/syscall/access.rs
+++ b/kernel/aster-nix/src/syscall/access.rs
@@ -14,20 +14,20 @@ pub fn sys_faccessat(
     dirfd: FileDesc,
     path_ptr: Vaddr,
     mode: u16,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "faccessat: dirfd = {}, path_ptr = {:#x}, mode = {:o}",
         dirfd, path_ptr, mode
     );
 
-    do_faccessat(dirfd, path_ptr, mode, 0)
+    do_faccessat(dirfd, path_ptr, mode, 0, ctx)
 }
 
-pub fn sys_access(path_ptr: Vaddr, mode: u16, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_access(path_ptr: Vaddr, mode: u16, ctx: &Context) -> Result<SyscallReturn> {
     debug!("access: path_ptr = {:#x}, mode = {:o}", path_ptr, mode);
 
-    do_faccessat(AT_FDCWD, path_ptr, mode, 0)
+    do_faccessat(AT_FDCWD, path_ptr, mode, 0, ctx)
 }
 
 bitflags! {
@@ -53,6 +53,7 @@ pub fn do_faccessat(
     path_ptr: Vaddr,
     mode: u16,
     flags: i32,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let mode = AccessMode::from_bits(mode)
         .ok_or_else(|| Error::with_message(Errno::EINVAL, "Invalid mode"))?;
@@ -65,11 +66,10 @@ pub fn do_faccessat(
         dirfd, path, mode, flags
     );
 
-    let current = current!();
     let dentry = {
         let path = path.to_string_lossy();
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
-        let fs = current.fs().read();
+        let fs = ctx.process.fs().read();
         if flags.contains(FaccessatFlags::AT_SYMLINK_NOFOLLOW) {
             fs.lookup_no_follow(&fs_path)?
         } else {
diff --git a/kernel/aster-nix/src/syscall/alarm.rs b/kernel/aster-nix/src/syscall/alarm.rs
index 9e115d984..c4ed3b57f 100644
--- a/kernel/aster-nix/src/syscall/alarm.rs
+++ b/kernel/aster-nix/src/syscall/alarm.rs
@@ -5,11 +5,10 @@ use core::time::Duration;
 use super::SyscallReturn;
 use crate::{prelude::*, time::timer::Timeout};
 
-pub fn sys_alarm(seconds: u32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_alarm(seconds: u32, ctx: &Context) -> Result<SyscallReturn> {
     debug!("seconds = {}", seconds);
 
-    let current = current!();
-    let alarm_timer = current.timer_manager().alarm_timer();
+    let alarm_timer = ctx.process.timer_manager().alarm_timer();
 
     let remaining = alarm_timer.remain();
     let mut remaining_secs = remaining.as_secs();
diff --git a/kernel/aster-nix/src/syscall/brk.rs b/kernel/aster-nix/src/syscall/brk.rs
index 51c7cca29..80f96452c 100644
--- a/kernel/aster-nix/src/syscall/brk.rs
+++ b/kernel/aster-nix/src/syscall/brk.rs
@@ -3,15 +3,14 @@
 use crate::{prelude::*, syscall::SyscallReturn};
 
 /// expand the user heap to new heap end, returns the new heap end if expansion succeeds.
-pub fn sys_brk(heap_end: u64, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_brk(heap_end: u64, ctx: &Context) -> Result<SyscallReturn> {
     let new_heap_end = if heap_end == 0 {
         None
     } else {
         Some(heap_end as usize)
     };
     debug!("new heap end = {:x?}", heap_end);
-    let current = current!();
-    let user_heap = current.heap();
+    let user_heap = ctx.process.heap();
     let new_heap_end = user_heap.brk(new_heap_end)?;
 
     Ok(SyscallReturn::Return(new_heap_end as _))
diff --git a/kernel/aster-nix/src/syscall/chdir.rs b/kernel/aster-nix/src/syscall/chdir.rs
index 6b4c9099a..730f9594b 100644
--- a/kernel/aster-nix/src/syscall/chdir.rs
+++ b/kernel/aster-nix/src/syscall/chdir.rs
@@ -7,12 +7,11 @@ use crate::{
     syscall::constants::MAX_FILENAME_LEN,
 };
 
-pub fn sys_chdir(path_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_chdir(path_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_ptr, MAX_FILENAME_LEN)?;
     debug!("path = {:?}", path);
 
-    let current = current!();
-    let mut fs = current.fs().write();
+    let mut fs = ctx.process.fs().write();
     let dentry = {
         let path = path.to_string_lossy();
         if path.is_empty() {
@@ -28,12 +27,11 @@ pub fn sys_chdir(path_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
     Ok(SyscallReturn::Return(0))
 }
 
-pub fn sys_fchdir(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fchdir(fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}", fd);
 
-    let current = current!();
     let dentry = {
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         let file = file_table.get_file(fd)?;
         let inode_handle = file
             .downcast_ref::<InodeHandle>()
@@ -43,6 +41,6 @@ pub fn sys_fchdir(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
     if dentry.type_() != InodeType::Dir {
         return_errno_with_message!(Errno::ENOTDIR, "must be directory");
     }
-    current.fs().write().set_cwd(dentry);
+    ctx.process.fs().write().set_cwd(dentry);
     Ok(SyscallReturn::Return(0))
 }
diff --git a/kernel/aster-nix/src/syscall/chmod.rs b/kernel/aster-nix/src/syscall/chmod.rs
index 8c6f7a826..476ce3468 100644
--- a/kernel/aster-nix/src/syscall/chmod.rs
+++ b/kernel/aster-nix/src/syscall/chmod.rs
@@ -10,11 +10,10 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_fchmod(fd: FileDesc, mode: u16, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fchmod(fd: FileDesc, mode: u16, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, mode = 0o{:o}", fd, mode);
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     file.set_mode(InodeMode::from_bits_truncate(mode))?;
     Ok(SyscallReturn::Return(0))
@@ -30,19 +29,18 @@ pub fn sys_fchmodat(
     path_ptr: Vaddr,
     mode: u16,
     /* flags: u32, */
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_ptr, PATH_MAX)?;
     debug!("dirfd = {}, path = {:?}, mode = 0o{:o}", dirfd, path, mode,);
 
-    let current = current!();
     let dentry = {
         let path = path.to_string_lossy();
         if path.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "path is empty");
         }
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
     dentry.set_mode(InodeMode::from_bits_truncate(mode))?;
     Ok(SyscallReturn::Return(0))
diff --git a/kernel/aster-nix/src/syscall/chown.rs b/kernel/aster-nix/src/syscall/chown.rs
index 2684bb415..9c08fc3d9 100644
--- a/kernel/aster-nix/src/syscall/chown.rs
+++ b/kernel/aster-nix/src/syscall/chown.rs
@@ -11,7 +11,7 @@ use crate::{
     process::{Gid, Uid},
 };
 
-pub fn sys_fchown(fd: FileDesc, uid: i32, gid: i32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fchown(fd: FileDesc, uid: i32, gid: i32, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, uid = {}, gid = {}", fd, uid, gid);
 
     let uid = to_optional_id(uid, Uid::new)?;
@@ -20,8 +20,7 @@ pub fn sys_fchown(fd: FileDesc, uid: i32, gid: i32, _ctx: &Context) -> Result<Sy
         return Ok(SyscallReturn::Return(0));
     }
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     if let Some(uid) = uid {
         file.set_owner(uid)?;
@@ -76,11 +75,10 @@ pub fn sys_fchownat(
         return Ok(SyscallReturn::Return(0));
     }
 
-    let current = current!();
     let dentry = {
         let path = path.to_string_lossy();
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
-        let fs = current.fs().read();
+        let fs = ctx.process.fs().read();
         if flags.contains(ChownFlags::AT_SYMLINK_NOFOLLOW) {
             fs.lookup_no_follow(&fs_path)?
         } else {
diff --git a/kernel/aster-nix/src/syscall/chroot.rs b/kernel/aster-nix/src/syscall/chroot.rs
index 491262984..5417ab0f6 100644
--- a/kernel/aster-nix/src/syscall/chroot.rs
+++ b/kernel/aster-nix/src/syscall/chroot.rs
@@ -7,12 +7,11 @@ use crate::{
     syscall::constants::MAX_FILENAME_LEN,
 };
 
-pub fn sys_chroot(path_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_chroot(path_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_ptr, MAX_FILENAME_LEN)?;
     debug!("path = {:?}", path);
 
-    let current = current!();
-    let mut fs = current.fs().write();
+    let mut fs = ctx.process.fs().write();
     let dentry = {
         let path = path.to_string_lossy();
         if path.is_empty() {
diff --git a/kernel/aster-nix/src/syscall/clock_gettime.rs b/kernel/aster-nix/src/syscall/clock_gettime.rs
index e1609008a..20574f5e6 100644
--- a/kernel/aster-nix/src/syscall/clock_gettime.rs
+++ b/kernel/aster-nix/src/syscall/clock_gettime.rs
@@ -22,11 +22,11 @@ use crate::{
 pub fn sys_clock_gettime(
     clockid: clockid_t,
     timespec_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!("clockid = {:?}", clockid);
 
-    let time_duration = read_clock(clockid)?;
+    let time_duration = read_clock(clockid, ctx)?;
 
     let timespec = timespec_t::from(time_duration);
     CurrentUserSpace::get().write_val(timespec_addr, &timespec)?;
@@ -109,7 +109,7 @@ pub enum DynamicClockType {
 /// Reads the time of a clock specified by the input clock ID.
 ///
 /// If the clock ID does not support, this function will return `Err`.
-pub fn read_clock(clockid: clockid_t) -> Result<Duration> {
+pub fn read_clock(clockid: clockid_t, ctx: &Context) -> Result<Duration> {
     if clockid >= 0 {
         let clock_id = ClockId::try_from(clockid)?;
         match clock_id {
@@ -119,14 +119,8 @@ pub fn read_clock(clockid: clockid_t) -> Result<Duration> {
             ClockId::CLOCK_REALTIME_COARSE => Ok(RealTimeCoarseClock::get().read_time()),
             ClockId::CLOCK_MONOTONIC_COARSE => Ok(MonotonicCoarseClock::get().read_time()),
             ClockId::CLOCK_BOOTTIME => Ok(BootTimeClock::get().read_time()),
-            ClockId::CLOCK_PROCESS_CPUTIME_ID => {
-                let process = current!();
-                Ok(process.prof_clock().read_time())
-            }
-            ClockId::CLOCK_THREAD_CPUTIME_ID => {
-                let thread = current_thread!();
-                Ok(thread.as_posix_thread().unwrap().prof_clock().read_time())
-            }
+            ClockId::CLOCK_PROCESS_CPUTIME_ID => Ok(ctx.process.prof_clock().read_time()),
+            ClockId::CLOCK_THREAD_CPUTIME_ID => Ok(ctx.posix_thread.prof_clock().read_time()),
         }
     } else {
         let dynamic_clockid_info = DynamicClockIdInfo::try_from(clockid)?;
diff --git a/kernel/aster-nix/src/syscall/close.rs b/kernel/aster-nix/src/syscall/close.rs
index b84d37e69..6ce27f93e 100644
--- a/kernel/aster-nix/src/syscall/close.rs
+++ b/kernel/aster-nix/src/syscall/close.rs
@@ -3,12 +3,11 @@
 use super::SyscallReturn;
 use crate::{fs::file_table::FileDesc, prelude::*};
 
-pub fn sys_close(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_close(fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}", fd);
 
     let file = {
-        let current = current!();
-        let mut file_table = current.file_table().lock();
+        let mut file_table = ctx.process.file_table().lock();
         let _ = file_table.get_file(fd)?;
         file_table.close_file(fd).unwrap()
     };
diff --git a/kernel/aster-nix/src/syscall/dup.rs b/kernel/aster-nix/src/syscall/dup.rs
index 54ff2ec1e..4b3765b1d 100644
--- a/kernel/aster-nix/src/syscall/dup.rs
+++ b/kernel/aster-nix/src/syscall/dup.rs
@@ -7,34 +7,32 @@ use crate::{
     process::ResourceType,
 };
 
-pub fn sys_dup(old_fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_dup(old_fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("old_fd = {}", old_fd);
 
-    let current = current!();
-    let mut file_table = current.file_table().lock();
+    let mut file_table = ctx.process.file_table().lock();
     let new_fd = file_table.dup(old_fd, 0, FdFlags::empty())?;
 
     Ok(SyscallReturn::Return(new_fd as _))
 }
 
-pub fn sys_dup2(old_fd: FileDesc, new_fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_dup2(old_fd: FileDesc, new_fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("old_fd = {}, new_fd = {}", old_fd, new_fd);
 
     if old_fd == new_fd {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         let _ = file_table.get_file(old_fd)?;
         return Ok(SyscallReturn::Return(new_fd as _));
     }
 
-    do_dup3(old_fd, new_fd, FdFlags::empty())
+    do_dup3(old_fd, new_fd, FdFlags::empty(), ctx)
 }
 
 pub fn sys_dup3(
     old_fd: FileDesc,
     new_fd: FileDesc,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!("old_fd = {}, new_fd = {}", old_fd, new_fd);
 
@@ -44,15 +42,20 @@ pub fn sys_dup3(
         _ => return_errno_with_message!(Errno::EINVAL, "flags must be O_CLOEXEC or 0"),
     };
 
-    do_dup3(old_fd, new_fd, fdflag)
+    do_dup3(old_fd, new_fd, fdflag, ctx)
 }
 
-fn do_dup3(old_fd: FileDesc, new_fd: FileDesc, flags: FdFlags) -> Result<SyscallReturn> {
+fn do_dup3(
+    old_fd: FileDesc,
+    new_fd: FileDesc,
+    flags: FdFlags,
+    ctx: &Context,
+) -> Result<SyscallReturn> {
     if old_fd == new_fd {
         return_errno!(Errno::EINVAL);
     }
 
-    let current = current!();
+    let current = ctx.process;
     if new_fd
         >= current
             .resource_limits()
diff --git a/kernel/aster-nix/src/syscall/epoll.rs b/kernel/aster-nix/src/syscall/epoll.rs
index d5b95e010..af406bc65 100644
--- a/kernel/aster-nix/src/syscall/epoll.rs
+++ b/kernel/aster-nix/src/syscall/epoll.rs
@@ -21,7 +21,7 @@ pub fn sys_epoll_create(size: i32, ctx: &Context) -> Result<SyscallReturn> {
     sys_epoll_create1(0, ctx)
 }
 
-pub fn sys_epoll_create1(flags: u32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_epoll_create1(flags: u32, ctx: &Context) -> Result<SyscallReturn> {
     debug!("flags = 0x{:x}", flags);
 
     let fd_flags = {
@@ -37,9 +37,8 @@ pub fn sys_epoll_create1(flags: u32, _ctx: &Context) -> Result<SyscallReturn> {
         }
     };
 
-    let current = current!();
     let epoll_file: Arc<EpollFile> = EpollFile::new();
-    let mut file_table = current.file_table().lock();
+    let mut file_table = ctx.process.file_table().lock();
     let fd = file_table.insert(epoll_file, fd_flags);
     Ok(SyscallReturn::Return(fd as _))
 }
@@ -49,7 +48,7 @@ pub fn sys_epoll_ctl(
     op: i32,
     fd: FileDesc,
     event_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "epfd = {}, op = {}, fd = {}, event_addr = 0x{:x}",
@@ -77,9 +76,8 @@ pub fn sys_epoll_ctl(
         _ => return_errno_with_message!(Errno::EINVAL, "invalid op"),
     };
 
-    let current = current!();
     let file = {
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(epfd)?.clone()
     };
     let epoll_file = file
@@ -90,7 +88,12 @@ pub fn sys_epoll_ctl(
     Ok(SyscallReturn::Return(0 as _))
 }
 
-fn do_epoll_wait(epfd: FileDesc, max_events: i32, timeout: i32) -> Result<Vec<EpollEvent>> {
+fn do_epoll_wait(
+    epfd: FileDesc,
+    max_events: i32,
+    timeout: i32,
+    ctx: &Context,
+) -> Result<Vec<EpollEvent>> {
     let max_events = {
         if max_events <= 0 {
             return_errno_with_message!(Errno::EINVAL, "max_events is not positive");
@@ -103,8 +106,7 @@ fn do_epoll_wait(epfd: FileDesc, max_events: i32, timeout: i32) -> Result<Vec<Ep
         None
     };
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let epoll_file = file_table
         .get_file(epfd)?
         .downcast_ref::<EpollFile>()
@@ -129,14 +131,14 @@ pub fn sys_epoll_wait(
     events_addr: Vaddr,
     max_events: i32,
     timeout: i32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "epfd = {}, events_addr = 0x{:x}, max_events = {}, timeout = {:?}",
         epfd, events_addr, max_events, timeout
     );
 
-    let epoll_events = do_epoll_wait(epfd, max_events, timeout)?;
+    let epoll_events = do_epoll_wait(epfd, max_events, timeout, ctx)?;
 
     // Write back
     let mut write_addr = events_addr;
@@ -184,7 +186,7 @@ pub fn sys_epoll_pwait(
     timeout: i32,
     sigmask: Vaddr,
     sigset_size: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "epfd = {}, events_addr = 0x{:x}, max_events = {}, timeout = {:?}, sigmask = 0x{:x}, sigset_size = {}",
@@ -197,7 +199,7 @@ pub fn sys_epoll_pwait(
 
     let old_sig_mask_value = set_signal_mask(sigmask)?;
 
-    let ready_events = match do_epoll_wait(epfd, max_events, timeout) {
+    let ready_events = match do_epoll_wait(epfd, max_events, timeout, ctx) {
         Ok(events) => {
             restore_signal_mask(old_sig_mask_value);
             events
diff --git a/kernel/aster-nix/src/syscall/eventfd.rs b/kernel/aster-nix/src/syscall/eventfd.rs
index 9be19f221..f9c16f1d2 100644
--- a/kernel/aster-nix/src/syscall/eventfd.rs
+++ b/kernel/aster-nix/src/syscall/eventfd.rs
@@ -30,30 +30,29 @@ use crate::{
     time::clocks::RealTimeClock,
 };
 
-pub fn sys_eventfd(init_val: u64, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_eventfd(init_val: u64, ctx: &Context) -> Result<SyscallReturn> {
     debug!("init_val = 0x{:x}", init_val);
 
-    let fd = do_sys_eventfd2(init_val, Flags::empty());
+    let fd = do_sys_eventfd2(init_val, Flags::empty(), ctx);
 
     Ok(SyscallReturn::Return(fd as _))
 }
 
-pub fn sys_eventfd2(init_val: u64, flags: u32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_eventfd2(init_val: u64, flags: u32, ctx: &Context) -> Result<SyscallReturn> {
     trace!("raw flags = {}", flags);
     let flags = Flags::from_bits(flags)
         .ok_or_else(|| Error::with_message(Errno::EINVAL, "unknown flags"))?;
     debug!("init_val = 0x{:x}, flags = {:?}", init_val, flags);
 
-    let fd = do_sys_eventfd2(init_val, flags);
+    let fd = do_sys_eventfd2(init_val, flags, ctx);
 
     Ok(SyscallReturn::Return(fd as _))
 }
 
-fn do_sys_eventfd2(init_val: u64, flags: Flags) -> FileDesc {
+fn do_sys_eventfd2(init_val: u64, flags: Flags, ctx: &Context) -> FileDesc {
     let event_file = EventFile::new(init_val, flags);
     let fd = {
-        let current = current!();
-        let mut file_table = current.file_table().lock();
+        let mut file_table = ctx.process.file_table().lock();
         let fd_flags = if flags.contains(Flags::EFD_CLOEXEC) {
             FdFlags::CLOEXEC
         } else {
diff --git a/kernel/aster-nix/src/syscall/execve.rs b/kernel/aster-nix/src/syscall/execve.rs
index e94f36f19..ffc937f17 100644
--- a/kernel/aster-nix/src/syscall/execve.rs
+++ b/kernel/aster-nix/src/syscall/execve.rs
@@ -28,7 +28,7 @@ pub fn sys_execve(
 ) -> Result<SyscallReturn> {
     let elf_file = {
         let executable_path = read_filename(filename_ptr)?;
-        lookup_executable_file(AT_FDCWD, executable_path, OpenFlags::empty())?
+        lookup_executable_file(AT_FDCWD, executable_path, OpenFlags::empty(), ctx)?
     };
 
     do_execve(elf_file, argv_ptr_ptr, envp_ptr_ptr, ctx, user_ctx)?;
@@ -47,7 +47,7 @@ pub fn sys_execveat(
     let elf_file = {
         let flags = OpenFlags::from_bits_truncate(flags);
         let filename = read_filename(filename_ptr)?;
-        lookup_executable_file(dfd, filename, flags)?
+        lookup_executable_file(dfd, filename, flags, ctx)?
     };
 
     do_execve(elf_file, argv_ptr_ptr, envp_ptr_ptr, ctx, user_ctx)?;
@@ -58,9 +58,9 @@ fn lookup_executable_file(
     dfd: FileDesc,
     filename: String,
     flags: OpenFlags,
+    ctx: &Context,
 ) -> Result<Arc<Dentry>> {
-    let current = current!();
-    let fs_resolver = current.fs().read();
+    let fs_resolver = ctx.process.fs().read();
     let dentry = if flags.contains(OpenFlags::AT_EMPTY_PATH) && filename.is_empty() {
         fs_resolver.lookup_from_fd(dfd)
     } else {
diff --git a/kernel/aster-nix/src/syscall/fallocate.rs b/kernel/aster-nix/src/syscall/fallocate.rs
index 8edb4b5cb..00fe30b37 100644
--- a/kernel/aster-nix/src/syscall/fallocate.rs
+++ b/kernel/aster-nix/src/syscall/fallocate.rs
@@ -12,18 +12,17 @@ pub fn sys_fallocate(
     mode: u64,
     offset: i64,
     len: i64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, mode = {}, offset = {}, len = {}",
         fd, mode, offset, len
     );
 
-    check_offset_and_len(offset, len)?;
+    check_offset_and_len(offset, len, ctx)?;
 
     let file = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(fd)?.clone()
     };
 
@@ -36,7 +35,7 @@ pub fn sys_fallocate(
     Ok(SyscallReturn::Return(0))
 }
 
-fn check_offset_and_len(offset: i64, len: i64) -> Result<()> {
+fn check_offset_and_len(offset: i64, len: i64, ctx: &Context) -> Result<()> {
     if offset < 0 || len <= 0 {
         return_errno_with_message!(
             Errno::EINVAL,
@@ -48,8 +47,7 @@ fn check_offset_and_len(offset: i64, len: i64) -> Result<()> {
     }
 
     let max_file_size = {
-        let current = current!();
-        let resource_limits = current.resource_limits().lock();
+        let resource_limits = ctx.process.resource_limits().lock();
         resource_limits
             .get_rlimit(ResourceType::RLIMIT_FSIZE)
             .get_cur() as usize
diff --git a/kernel/aster-nix/src/syscall/fcntl.rs b/kernel/aster-nix/src/syscall/fcntl.rs
index e70ba8c62..be914a022 100644
--- a/kernel/aster-nix/src/syscall/fcntl.rs
+++ b/kernel/aster-nix/src/syscall/fcntl.rs
@@ -10,24 +10,22 @@ use crate::{
     process::Pid,
 };
 
-pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, ctx: &Context) -> Result<SyscallReturn> {
     let fcntl_cmd = FcntlCmd::try_from(cmd)?;
     debug!("fd = {}, cmd = {:?}, arg = {}", fd, fcntl_cmd, arg);
+    let current = ctx.process;
     match fcntl_cmd {
         FcntlCmd::F_DUPFD => {
-            let current = current!();
             let mut file_table = current.file_table().lock();
             let new_fd = file_table.dup(fd, arg as FileDesc, FdFlags::empty())?;
             Ok(SyscallReturn::Return(new_fd as _))
         }
         FcntlCmd::F_DUPFD_CLOEXEC => {
-            let current = current!();
             let mut file_table = current.file_table().lock();
             let new_fd = file_table.dup(fd, arg as FileDesc, FdFlags::CLOEXEC)?;
             Ok(SyscallReturn::Return(new_fd as _))
         }
         FcntlCmd::F_GETFD => {
-            let current = current!();
             let file_table = current.file_table().lock();
             let entry = file_table.get_entry(fd)?;
             let fd_flags = entry.flags();
@@ -41,14 +39,12 @@ pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, _ctx: &Context) -> Result<Sys
                 FdFlags::from_bits(arg as u8)
                     .ok_or(Error::with_message(Errno::EINVAL, "invalid flags"))?
             };
-            let current = current!();
             let file_table = current.file_table().lock();
             let entry = file_table.get_entry(fd)?;
             entry.set_flags(flags);
             Ok(SyscallReturn::Return(0))
         }
         FcntlCmd::F_GETFL => {
-            let current = current!();
             let file = {
                 let file_table = current.file_table().lock();
                 file_table.get_file(fd)?.clone()
@@ -60,7 +56,6 @@ pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, _ctx: &Context) -> Result<Sys
             ))
         }
         FcntlCmd::F_SETFL => {
-            let current = current!();
             let file = {
                 let file_table = current.file_table().lock();
                 file_table.get_file(fd)?.clone()
@@ -82,7 +77,6 @@ pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, _ctx: &Context) -> Result<Sys
             Ok(SyscallReturn::Return(0))
         }
         FcntlCmd::F_SETOWN => {
-            let current = current!();
             let file_table = current.file_table().lock();
             let file_entry = file_table.get_entry(fd)?;
             // A process ID is specified as a positive value; a process group ID is specified as a negative value.
@@ -96,7 +90,6 @@ pub fn sys_fcntl(fd: FileDesc, cmd: i32, arg: u64, _ctx: &Context) -> Result<Sys
             Ok(SyscallReturn::Return(0))
         }
         FcntlCmd::F_GETOWN => {
-            let current = current!();
             let file_table = current.file_table().lock();
             let file_entry = file_table.get_entry(fd)?;
             let pid = file_entry.owner().unwrap_or(0);
diff --git a/kernel/aster-nix/src/syscall/fsync.rs b/kernel/aster-nix/src/syscall/fsync.rs
index 112e66fac..4c3135c4d 100644
--- a/kernel/aster-nix/src/syscall/fsync.rs
+++ b/kernel/aster-nix/src/syscall/fsync.rs
@@ -6,12 +6,11 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_fsync(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fsync(fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}", fd);
 
     let dentry = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         let file = file_table.get_file(fd)?;
         let inode_handle = file
             .downcast_ref::<InodeHandle>()
@@ -22,12 +21,11 @@ pub fn sys_fsync(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
     Ok(SyscallReturn::Return(0))
 }
 
-pub fn sys_fdatasync(fd: FileDesc, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fdatasync(fd: FileDesc, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}", fd);
 
     let dentry = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         let file = file_table.get_file(fd)?;
         let inode_handle = file
             .downcast_ref::<InodeHandle>()
diff --git a/kernel/aster-nix/src/syscall/getdents64.rs b/kernel/aster-nix/src/syscall/getdents64.rs
index 5d0f94e14..8c354cee3 100644
--- a/kernel/aster-nix/src/syscall/getdents64.rs
+++ b/kernel/aster-nix/src/syscall/getdents64.rs
@@ -16,7 +16,7 @@ pub fn sys_getdents(
     fd: FileDesc,
     buf_addr: Vaddr,
     buf_len: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, buf_addr = 0x{:x}, buf_len = 0x{:x}",
@@ -24,8 +24,7 @@ pub fn sys_getdents(
     );
 
     let file = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(fd)?.clone()
     };
     let inode_handle = file
@@ -46,7 +45,7 @@ pub fn sys_getdents64(
     fd: FileDesc,
     buf_addr: Vaddr,
     buf_len: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, buf_addr = 0x{:x}, buf_len = 0x{:x}",
@@ -54,8 +53,7 @@ pub fn sys_getdents64(
     );
 
     let file = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(fd)?.clone()
     };
     let inode_handle = file
diff --git a/kernel/aster-nix/src/syscall/getpgrp.rs b/kernel/aster-nix/src/syscall/getpgrp.rs
index 911275c2a..58685ebc8 100644
--- a/kernel/aster-nix/src/syscall/getpgrp.rs
+++ b/kernel/aster-nix/src/syscall/getpgrp.rs
@@ -3,7 +3,6 @@
 use super::SyscallReturn;
 use crate::prelude::*;
 
-pub fn sys_getpgrp(_ctx: &Context) -> Result<SyscallReturn> {
-    let current = current!();
-    Ok(SyscallReturn::Return(current.pgid() as _))
+pub fn sys_getpgrp(ctx: &Context) -> Result<SyscallReturn> {
+    Ok(SyscallReturn::Return(ctx.process.pgid() as _))
 }
diff --git a/kernel/aster-nix/src/syscall/getppid.rs b/kernel/aster-nix/src/syscall/getppid.rs
index 8b7013267..7cfa33d32 100644
--- a/kernel/aster-nix/src/syscall/getppid.rs
+++ b/kernel/aster-nix/src/syscall/getppid.rs
@@ -3,9 +3,8 @@
 use super::SyscallReturn;
 use crate::prelude::*;
 
-pub fn sys_getppid(_ctx: &Context) -> Result<SyscallReturn> {
-    let current = current!();
-    let parent = current.parent();
+pub fn sys_getppid(ctx: &Context) -> Result<SyscallReturn> {
+    let parent = ctx.process.parent();
     match parent {
         None => Ok(SyscallReturn::Return(0)),
         Some(parent) => Ok(SyscallReturn::Return(parent.pid() as _)),
diff --git a/kernel/aster-nix/src/syscall/getrusage.rs b/kernel/aster-nix/src/syscall/getrusage.rs
index d7f1448b8..b82df6d51 100644
--- a/kernel/aster-nix/src/syscall/getrusage.rs
+++ b/kernel/aster-nix/src/syscall/getrusage.rs
@@ -3,7 +3,7 @@
 use int_to_c_enum::TryFromInt;
 
 use super::SyscallReturn;
-use crate::{prelude::*, process::posix_thread::PosixThreadExt, time::timeval_t};
+use crate::{prelude::*, time::timeval_t};
 
 #[derive(Debug, Copy, Clone, TryFromInt, PartialEq)]
 #[repr(i32)]
@@ -14,7 +14,7 @@ enum RusageTarget {
     Thread = 1,
 }
 
-pub fn sys_getrusage(target: i32, rusage_addr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_getrusage(target: i32, rusage_addr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     let rusage_target = RusageTarget::try_from(target)?;
 
     debug!(
@@ -25,7 +25,7 @@ pub fn sys_getrusage(target: i32, rusage_addr: Vaddr, _ctx: &Context) -> Result<
     if rusage_addr != 0 {
         let rusage = match rusage_target {
             RusageTarget::ForSelf => {
-                let process = current!();
+                let process = ctx.process;
                 rusage_t {
                     ru_utime: process.prof_clock().user_clock().read_time().into(),
                     ru_stime: process.prof_clock().kernel_clock().read_time().into(),
@@ -33,8 +33,7 @@ pub fn sys_getrusage(target: i32, rusage_addr: Vaddr, _ctx: &Context) -> Result<
                 }
             }
             RusageTarget::Thread => {
-                let thread = current_thread!();
-                let posix_thread = thread.as_posix_thread().unwrap();
+                let posix_thread = ctx.posix_thread;
                 rusage_t {
                     ru_utime: posix_thread.prof_clock().user_clock().read_time().into(),
                     ru_stime: posix_thread.prof_clock().kernel_clock().read_time().into(),
diff --git a/kernel/aster-nix/src/syscall/getsid.rs b/kernel/aster-nix/src/syscall/getsid.rs
index 08b880661..cb84525a6 100644
--- a/kernel/aster-nix/src/syscall/getsid.rs
+++ b/kernel/aster-nix/src/syscall/getsid.rs
@@ -6,10 +6,10 @@ use crate::{
     process::{process_table, Pid},
 };
 
-pub fn sys_getsid(pid: Pid, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_getsid(pid: Pid, ctx: &Context) -> Result<SyscallReturn> {
     debug!("pid = {}", pid);
 
-    let session = current!().session().unwrap();
+    let session = ctx.process.session().unwrap();
     let sid = session.sid();
 
     if pid == 0 {
diff --git a/kernel/aster-nix/src/syscall/ioctl.rs b/kernel/aster-nix/src/syscall/ioctl.rs
index d1f92c591..4a36a122e 100644
--- a/kernel/aster-nix/src/syscall/ioctl.rs
+++ b/kernel/aster-nix/src/syscall/ioctl.rs
@@ -9,14 +9,13 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_ioctl(fd: FileDesc, cmd: u32, arg: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_ioctl(fd: FileDesc, cmd: u32, arg: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     let ioctl_cmd = IoctlCmd::try_from(cmd)?;
     debug!(
         "fd = {}, ioctl_cmd = {:?}, arg = 0x{:x}",
         fd, ioctl_cmd, arg
     );
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     let res = match ioctl_cmd {
         IoctlCmd::FIONBIO => {
diff --git a/kernel/aster-nix/src/syscall/kill.rs b/kernel/aster-nix/src/syscall/kill.rs
index 03f54587e..12082f894 100644
--- a/kernel/aster-nix/src/syscall/kill.rs
+++ b/kernel/aster-nix/src/syscall/kill.rs
@@ -29,10 +29,8 @@ pub fn sys_kill(process_filter: u64, sig_num: u64, ctx: &Context) -> Result<Sysc
 }
 
 pub fn do_sys_kill(filter: ProcessFilter, sig_num: Option<SigNum>, ctx: &Context) -> Result<()> {
-    let current = current!();
-
     let signal = sig_num.map(|sig_num| {
-        let pid = current.pid();
+        let pid = ctx.process.pid();
         let uid = ctx.posix_thread.credentials().ruid();
         UserSignal::new(sig_num, UserSignalKind::Kill, pid, uid)
     });
diff --git a/kernel/aster-nix/src/syscall/link.rs b/kernel/aster-nix/src/syscall/link.rs
index be592ac24..b8ad0fd0c 100644
--- a/kernel/aster-nix/src/syscall/link.rs
+++ b/kernel/aster-nix/src/syscall/link.rs
@@ -16,7 +16,7 @@ pub fn sys_linkat(
     new_dirfd: FileDesc,
     new_path_addr: Vaddr,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
 
@@ -29,7 +29,6 @@ pub fn sys_linkat(
         old_dirfd, old_path, new_dirfd, new_path, flags
     );
 
-    let current = current!();
     let (old_dentry, new_dir_dentry, new_name) = {
         let old_path = old_path.to_string_lossy();
         if old_path.ends_with('/') {
@@ -45,7 +44,7 @@ pub fn sys_linkat(
 
         let old_fs_path = FsPath::new(old_dirfd, old_path.as_ref())?;
         let new_fs_path = FsPath::new(new_dirfd, new_path.as_ref())?;
-        let fs = current.fs().read();
+        let fs = ctx.process.fs().read();
         let old_dentry = if flags.contains(LinkFlags::AT_SYMLINK_FOLLOW) {
             fs.lookup(&old_fs_path)?
         } else {
diff --git a/kernel/aster-nix/src/syscall/lseek.rs b/kernel/aster-nix/src/syscall/lseek.rs
index b9af9a939..6819a9c21 100644
--- a/kernel/aster-nix/src/syscall/lseek.rs
+++ b/kernel/aster-nix/src/syscall/lseek.rs
@@ -6,12 +6,7 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_lseek(
-    fd: FileDesc,
-    offset: isize,
-    whence: u32,
-    _ctx: &Context,
-) -> Result<SyscallReturn> {
+pub fn sys_lseek(fd: FileDesc, offset: isize, whence: u32, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, offset = {}, whence = {}", fd, offset, whence);
     let seek_from = match whence {
         0 => {
@@ -24,8 +19,7 @@ pub fn sys_lseek(
         2 => SeekFrom::End(offset),
         _ => return_errno!(Errno::EINVAL),
     };
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     let offset = file.seek(seek_from)?;
     Ok(SyscallReturn::Return(offset as _))
diff --git a/kernel/aster-nix/src/syscall/madvise.rs b/kernel/aster-nix/src/syscall/madvise.rs
index eefd428fb..34734eaaf 100644
--- a/kernel/aster-nix/src/syscall/madvise.rs
+++ b/kernel/aster-nix/src/syscall/madvise.rs
@@ -7,7 +7,7 @@ pub fn sys_madvise(
     start: Vaddr,
     len: usize,
     behavior: i32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let behavior = MadviseBehavior::try_from(behavior)?;
     debug!(
@@ -26,18 +26,17 @@ pub fn sys_madvise(
         MadviseBehavior::MADV_DONTNEED => {
             warn!("MADV_DONTNEED isn't implemented, do nothing for now.");
         }
-        MadviseBehavior::MADV_FREE => madv_free(start, len)?,
+        MadviseBehavior::MADV_FREE => madv_free(start, len, ctx)?,
         _ => todo!(),
     }
     Ok(SyscallReturn::Return(0))
 }
 
-fn madv_free(start: Vaddr, len: usize) -> Result<()> {
+fn madv_free(start: Vaddr, len: usize, ctx: &Context) -> Result<()> {
     debug_assert!(start % PAGE_SIZE == 0);
     debug_assert!(len % PAGE_SIZE == 0);
 
-    let current = current!();
-    let root_vmar = current.root_vmar();
+    let root_vmar = ctx.process.root_vmar();
     let advised_range = start..start + len;
     let _ = root_vmar.destroy(advised_range);
 
diff --git a/kernel/aster-nix/src/syscall/mkdir.rs b/kernel/aster-nix/src/syscall/mkdir.rs
index 1ac989649..844346462 100644
--- a/kernel/aster-nix/src/syscall/mkdir.rs
+++ b/kernel/aster-nix/src/syscall/mkdir.rs
@@ -15,12 +15,12 @@ pub fn sys_mkdirat(
     dirfd: FileDesc,
     path_addr: Vaddr,
     mode: u16,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
     debug!("dirfd = {}, path = {:?}, mode = {}", dirfd, path, mode);
 
-    let current = current!();
+    let current = ctx.process;
     let (dir_dentry, name) = {
         let path = path.to_string_lossy();
         if path.is_empty() {
diff --git a/kernel/aster-nix/src/syscall/mknod.rs b/kernel/aster-nix/src/syscall/mknod.rs
index 2ecf368cb..cddbc886b 100644
--- a/kernel/aster-nix/src/syscall/mknod.rs
+++ b/kernel/aster-nix/src/syscall/mknod.rs
@@ -17,10 +17,10 @@ pub fn sys_mknodat(
     path_addr: Vaddr,
     mode: u16,
     dev: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
-    let current = current!();
+    let current = ctx.process;
     let inode_mode = {
         let mask_mode = mode & !current.umask().read().get();
         InodeMode::from_bits_truncate(mask_mode)
diff --git a/kernel/aster-nix/src/syscall/mmap.rs b/kernel/aster-nix/src/syscall/mmap.rs
index d888ab95f..aab6e0852 100644
--- a/kernel/aster-nix/src/syscall/mmap.rs
+++ b/kernel/aster-nix/src/syscall/mmap.rs
@@ -22,7 +22,7 @@ pub fn sys_mmap(
     flags: u64,
     fd: u64,
     offset: u64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let perms = VmPerms::from_posix_prot_bits(perms as u32).unwrap();
     let option = MMapOptions::try_from(flags as u32)?;
@@ -33,6 +33,7 @@ pub fn sys_mmap(
         option,
         fd as _,
         offset as usize,
+        ctx,
     )?;
     Ok(SyscallReturn::Return(res as _))
 }
@@ -44,6 +45,7 @@ fn do_sys_mmap(
     option: MMapOptions,
     fd: FileDesc,
     offset: usize,
+    ctx: &Context,
 ) -> Result<Vaddr> {
     debug!(
         "addr = 0x{:x}, len = 0x{:x}, perms = {:?}, option = {:?}, fd = {}, offset = 0x{:x}",
@@ -64,11 +66,10 @@ fn do_sys_mmap(
         }
         alloc_anonyous_vmo(len)?
     } else {
-        alloc_filebacked_vmo(fd, len, offset, &option)?
+        alloc_filebacked_vmo(fd, len, offset, &option, ctx)?
     };
 
-    let current = current!();
-    let root_vmar = current.root_vmar();
+    let root_vmar = ctx.process.root_vmar();
     let vm_map_options = {
         let mut options = root_vmar.new_map(vmo.to_dyn(), vm_perms)?;
         let flags = option.flags;
@@ -101,10 +102,10 @@ fn alloc_filebacked_vmo(
     len: usize,
     offset: usize,
     option: &MMapOptions,
+    ctx: &Context,
 ) -> Result<Vmo> {
-    let current = current!();
     let page_cache_vmo = {
-        let fs_resolver = current.fs().read();
+        let fs_resolver = ctx.process.fs().read();
         let dentry = fs_resolver.lookup_from_fd(fd)?;
         let inode = dentry.inode();
         inode
diff --git a/kernel/aster-nix/src/syscall/mount.rs b/kernel/aster-nix/src/syscall/mount.rs
index 8c6d3f98f..89fc6c0f4 100644
--- a/kernel/aster-nix/src/syscall/mount.rs
+++ b/kernel/aster-nix/src/syscall/mount.rs
@@ -23,7 +23,7 @@ pub fn sys_mount(
     fstype_addr: Vaddr,
     flags: u64,
     data: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let devname = user_space.read_cstring(devname_addr, MAX_FILENAME_LEN)?;
@@ -34,14 +34,13 @@ pub fn sys_mount(
         devname, dirname, fstype_addr, mount_flags, data,
     );
 
-    let current = current!();
     let dst_dentry = {
         let dirname = dirname.to_string_lossy();
         if dirname.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "dirname is empty");
         }
         let fs_path = FsPath::new(AT_FDCWD, dirname.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
 
     if mount_flags.contains(MountFlags::MS_REMOUNT) && mount_flags.contains(MountFlags::MS_BIND) {
@@ -53,6 +52,7 @@ pub fn sys_mount(
             devname,
             dst_dentry,
             mount_flags.contains(MountFlags::MS_REC),
+            ctx,
         )?;
     } else if mount_flags.contains(MountFlags::MS_SHARED)
         | mount_flags.contains(MountFlags::MS_PRIVATE)
@@ -61,7 +61,7 @@ pub fn sys_mount(
     {
         do_change_type()?;
     } else if mount_flags.contains(MountFlags::MS_MOVE) {
-        do_move_mount_old(devname, dst_dentry)?;
+        do_move_mount_old(devname, dst_dentry, ctx)?;
     } else {
         do_new_mount(devname, fstype_addr, dst_dentry)?;
     }
@@ -81,15 +81,19 @@ fn do_remount() -> Result<()> {
 ///
 /// If recursive is true, then bind the mount recursively.
 /// Such as use user command `mount --rbind src dst`.
-fn do_bind_mount(src_name: CString, dst_dentry: Arc<Dentry>, recursive: bool) -> Result<()> {
-    let current = current!();
+fn do_bind_mount(
+    src_name: CString,
+    dst_dentry: Arc<Dentry>,
+    recursive: bool,
+    ctx: &Context,
+) -> Result<()> {
     let src_dentry = {
         let src_name = src_name.to_string_lossy();
         if src_name.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "src_name is empty");
         }
         let fs_path = FsPath::new(AT_FDCWD, src_name.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
 
     if src_dentry.type_() != InodeType::Dir {
@@ -105,15 +109,14 @@ fn do_change_type() -> Result<()> {
 }
 
 /// Move a mount from src location to dst location.
-fn do_move_mount_old(src_name: CString, dst_dentry: Arc<Dentry>) -> Result<()> {
-    let current = current!();
+fn do_move_mount_old(src_name: CString, dst_dentry: Arc<Dentry>, ctx: &Context) -> Result<()> {
     let src_dentry = {
         let src_name = src_name.to_string_lossy();
         if src_name.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "src_name is empty");
         }
         let fs_path = FsPath::new(AT_FDCWD, src_name.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
 
     if !src_dentry.is_root_of_mount() {
diff --git a/kernel/aster-nix/src/syscall/mprotect.rs b/kernel/aster-nix/src/syscall/mprotect.rs
index da0e258ac..c06348b98 100644
--- a/kernel/aster-nix/src/syscall/mprotect.rs
+++ b/kernel/aster-nix/src/syscall/mprotect.rs
@@ -5,14 +5,13 @@ use align_ext::AlignExt;
 use super::SyscallReturn;
 use crate::{prelude::*, vm::perms::VmPerms};
 
-pub fn sys_mprotect(addr: Vaddr, len: usize, perms: u64, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_mprotect(addr: Vaddr, len: usize, perms: u64, ctx: &Context) -> Result<SyscallReturn> {
     let vm_perms = VmPerms::from_bits_truncate(perms as u32);
     debug!(
         "addr = 0x{:x}, len = 0x{:x}, perms = {:?}",
         addr, len, vm_perms
     );
-    let current = current!();
-    let root_vmar = current.root_vmar();
+    let root_vmar = ctx.process.root_vmar();
     debug_assert!(addr % PAGE_SIZE == 0);
     let len = len.align_up(PAGE_SIZE);
     let range = addr..(addr + len);
diff --git a/kernel/aster-nix/src/syscall/munmap.rs b/kernel/aster-nix/src/syscall/munmap.rs
index b057365be..7823c3c07 100644
--- a/kernel/aster-nix/src/syscall/munmap.rs
+++ b/kernel/aster-nix/src/syscall/munmap.rs
@@ -5,10 +5,9 @@ use align_ext::AlignExt;
 use super::SyscallReturn;
 use crate::prelude::*;
 
-pub fn sys_munmap(addr: Vaddr, len: usize, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_munmap(addr: Vaddr, len: usize, ctx: &Context) -> Result<SyscallReturn> {
     debug!("addr = 0x{:x}, len = {}", addr, len);
-    let current = current!();
-    let root_vmar = current.root_vmar();
+    let root_vmar = ctx.process.root_vmar();
     let len = len.align_up(PAGE_SIZE);
     debug!("unmap range = 0x{:x} - 0x{:x}", addr, addr + len);
     root_vmar.destroy(addr..addr + len)?;
diff --git a/kernel/aster-nix/src/syscall/nanosleep.rs b/kernel/aster-nix/src/syscall/nanosleep.rs
index e2b01161a..f430ade23 100644
--- a/kernel/aster-nix/src/syscall/nanosleep.rs
+++ b/kernel/aster-nix/src/syscall/nanosleep.rs
@@ -12,7 +12,7 @@ use crate::{
 pub fn sys_nanosleep(
     request_timespec_addr: Vaddr,
     remain_timespec_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let clockid = ClockId::CLOCK_MONOTONIC;
 
@@ -21,6 +21,7 @@ pub fn sys_nanosleep(
         false,
         request_timespec_addr,
         remain_timespec_addr,
+        ctx,
     )
 }
 
@@ -29,7 +30,7 @@ pub fn sys_clock_nanosleep(
     flags: i32,
     request_timespec_addr: Vaddr,
     remain_timespec_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let is_abs_time = if flags == 0 {
         false
@@ -44,6 +45,7 @@ pub fn sys_clock_nanosleep(
         is_abs_time,
         request_timespec_addr,
         remain_timespec_addr,
+        ctx,
     )
 }
 
@@ -52,6 +54,7 @@ fn do_clock_nanosleep(
     is_abs_time: bool,
     request_timespec_addr: Vaddr,
     remain_timespec_addr: Vaddr,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let request_time = {
         let timespec = CurrentUserSpace::get().read_val::<timespec_t>(request_timespec_addr)?;
@@ -63,7 +66,7 @@ fn do_clock_nanosleep(
         clockid, is_abs_time, request_time, remain_timespec_addr
     );
 
-    let start_time = read_clock(clockid)?;
+    let start_time = read_clock(clockid, ctx)?;
     let timeout = if is_abs_time {
         if request_time < start_time {
             return Ok(SyscallReturn::Return(0));
@@ -82,7 +85,7 @@ fn do_clock_nanosleep(
     match res {
         Err(e) if e.error() == Errno::ETIME => Ok(SyscallReturn::Return(0)),
         Err(e) if e.error() == Errno::EINTR => {
-            let end_time = read_clock(clockid)?;
+            let end_time = read_clock(clockid, ctx)?;
 
             if end_time >= start_time + timeout {
                 return Ok(SyscallReturn::Return(0));
diff --git a/kernel/aster-nix/src/syscall/open.rs b/kernel/aster-nix/src/syscall/open.rs
index 6c8e7e0e3..f66ade271 100644
--- a/kernel/aster-nix/src/syscall/open.rs
+++ b/kernel/aster-nix/src/syscall/open.rs
@@ -16,7 +16,7 @@ pub fn sys_openat(
     path_addr: Vaddr,
     flags: u32,
     mode: u16,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
     debug!(
@@ -24,7 +24,7 @@ pub fn sys_openat(
         dirfd, path, flags, mode
     );
 
-    let current = current!();
+    let current = ctx.process;
     let file_handle = {
         let path = path.to_string_lossy();
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
diff --git a/kernel/aster-nix/src/syscall/pipe.rs b/kernel/aster-nix/src/syscall/pipe.rs
index 9fd74f316..a3556620e 100644
--- a/kernel/aster-nix/src/syscall/pipe.rs
+++ b/kernel/aster-nix/src/syscall/pipe.rs
@@ -10,7 +10,7 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_pipe2(fds: Vaddr, flags: u32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_pipe2(fds: Vaddr, flags: u32, ctx: &Context) -> Result<SyscallReturn> {
     debug!("flags: {:?}", flags);
 
     let (pipe_reader, pipe_writer) = {
@@ -30,8 +30,7 @@ pub fn sys_pipe2(fds: Vaddr, flags: u32, _ctx: &Context) -> Result<SyscallReturn
         FdFlags::empty()
     };
 
-    let current = current!();
-    let mut file_table = current.file_table().lock();
+    let mut file_table = ctx.process.file_table().lock();
 
     let pipe_fds = PipeFds {
         reader_fd: file_table.insert(pipe_reader, fd_flags),
diff --git a/kernel/aster-nix/src/syscall/poll.rs b/kernel/aster-nix/src/syscall/poll.rs
index 0c50779a5..929c1a4cc 100644
--- a/kernel/aster-nix/src/syscall/poll.rs
+++ b/kernel/aster-nix/src/syscall/poll.rs
@@ -5,7 +5,7 @@ use core::{cell::Cell, time::Duration};
 use super::SyscallReturn;
 use crate::{events::IoEvents, fs::file_table::FileDesc, prelude::*, process::signal::Poller};
 
-pub fn sys_poll(fds: Vaddr, nfds: u64, timeout: i32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_poll(fds: Vaddr, nfds: u64, timeout: i32, ctx: &Context) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let poll_fds = {
         let mut read_addr = fds;
@@ -31,7 +31,7 @@ pub fn sys_poll(fds: Vaddr, nfds: u64, timeout: i32, _ctx: &Context) -> Result<S
         poll_fds, nfds, timeout
     );
 
-    let num_revents = do_poll(&poll_fds, timeout)?;
+    let num_revents = do_poll(&poll_fds, timeout, ctx)?;
 
     // Write back
     let mut write_addr = fds;
@@ -45,7 +45,7 @@ pub fn sys_poll(fds: Vaddr, nfds: u64, timeout: i32, _ctx: &Context) -> Result<S
     Ok(SyscallReturn::Return(num_revents as _))
 }
 
-pub fn do_poll(poll_fds: &[PollFd], timeout: Option<Duration>) -> Result<usize> {
+pub fn do_poll(poll_fds: &[PollFd], timeout: Option<Duration>, ctx: &Context) -> Result<usize> {
     // The main loop of polling
     let mut poller = Poller::new();
     loop {
@@ -59,9 +59,8 @@ pub fn do_poll(poll_fds: &[PollFd], timeout: Option<Duration>) -> Result<usize>
             };
 
             // Poll the file
-            let current = current!();
             let file = {
-                let file_table = current.file_table().lock();
+                let file_table = ctx.process.file_table().lock();
                 file_table.get_file(fd)?.clone()
             };
             let need_poller = if num_revents == 0 {
diff --git a/kernel/aster-nix/src/syscall/prctl.rs b/kernel/aster-nix/src/syscall/prctl.rs
index 72dcbd56c..763624b6b 100644
--- a/kernel/aster-nix/src/syscall/prctl.rs
+++ b/kernel/aster-nix/src/syscall/prctl.rs
@@ -15,7 +15,7 @@ pub fn sys_prctl(
     arg3: u64,
     arg4: u64,
     arg5: u64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let prctl_cmd = PrctlCmd::from_args(option, arg2, arg3, arg4, arg5)?;
     debug!("prctl cmd = {:x?}", prctl_cmd);
@@ -23,14 +23,11 @@ pub fn sys_prctl(
     let posix_thread = current_thread.as_posix_thread().unwrap();
     match prctl_cmd {
         PrctlCmd::PR_SET_PDEATHSIG(signum) => {
-            let current = current!();
-            current.set_parent_death_signal(signum);
+            ctx.process.set_parent_death_signal(signum);
         }
         PrctlCmd::PR_GET_PDEATHSIG(write_to_addr) => {
             let write_val = {
-                let current = current!();
-
-                match current.parent_death_signal() {
+                match ctx.process.parent_death_signal() {
                     None => 0i32,
                     Some(signum) => signum.as_u8() as i32,
                 }
diff --git a/kernel/aster-nix/src/syscall/pread64.rs b/kernel/aster-nix/src/syscall/pread64.rs
index a2caf2fc1..9c058bd25 100644
--- a/kernel/aster-nix/src/syscall/pread64.rs
+++ b/kernel/aster-nix/src/syscall/pread64.rs
@@ -8,7 +8,7 @@ pub fn sys_pread64(
     user_buf_ptr: Vaddr,
     user_buf_len: usize,
     offset: i64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, buf = 0x{:x}, user_buf_len = 0x{:x}, offset = 0x{:x}",
@@ -19,8 +19,7 @@ pub fn sys_pread64(
         return_errno_with_message!(Errno::EINVAL, "offset cannot be negative");
     }
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
     // TODO: Check (f.file->f_mode & FMODE_PREAD); We don't have f_mode in our FileLike trait
diff --git a/kernel/aster-nix/src/syscall/preadv.rs b/kernel/aster-nix/src/syscall/preadv.rs
index d1b07686a..42209e30b 100644
--- a/kernel/aster-nix/src/syscall/preadv.rs
+++ b/kernel/aster-nix/src/syscall/preadv.rs
@@ -11,9 +11,9 @@ pub fn sys_readv(
     fd: FileDesc,
     io_vec_ptr: Vaddr,
     io_vec_count: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let res = do_sys_readv(fd, io_vec_ptr, io_vec_count)?;
+    let res = do_sys_readv(fd, io_vec_ptr, io_vec_count, ctx)?;
     Ok(SyscallReturn::Return(res as _))
 }
 
@@ -22,9 +22,9 @@ pub fn sys_preadv(
     io_vec_ptr: Vaddr,
     io_vec_count: usize,
     offset: i64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let res = do_sys_preadv(fd, io_vec_ptr, io_vec_count, offset, RWFFlag::empty())?;
+    let res = do_sys_preadv(fd, io_vec_ptr, io_vec_count, offset, RWFFlag::empty(), ctx)?;
     Ok(SyscallReturn::Return(res as _))
 }
 
@@ -34,16 +34,16 @@ pub fn sys_preadv2(
     io_vec_count: usize,
     offset: i64,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let flags = match RWFFlag::from_bits(flags) {
         Some(flags) => flags,
         None => return_errno_with_message!(Errno::EINVAL, "invalid flags"),
     };
     let res = if offset == -1 {
-        do_sys_readv(fd, io_vec_ptr, io_vec_count)?
+        do_sys_readv(fd, io_vec_ptr, io_vec_count, ctx)?
     } else {
-        do_sys_preadv(fd, io_vec_ptr, io_vec_count, offset, flags)?
+        do_sys_preadv(fd, io_vec_ptr, io_vec_count, offset, flags, ctx)?
     };
     Ok(SyscallReturn::Return(res as _))
 }
@@ -54,6 +54,7 @@ fn do_sys_preadv(
     io_vec_count: usize,
     offset: i64,
     _flags: RWFFlag,
+    ctx: &Context,
 ) -> Result<usize> {
     debug!(
         "preadv: fd = {}, io_vec_ptr = 0x{:x}, io_vec_counter = 0x{:x}, offset = 0x{:x}",
@@ -65,8 +66,7 @@ fn do_sys_preadv(
     }
 
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
 
@@ -125,15 +125,19 @@ fn do_sys_preadv(
     Ok(total_len)
 }
 
-fn do_sys_readv(fd: FileDesc, io_vec_ptr: Vaddr, io_vec_count: usize) -> Result<usize> {
+fn do_sys_readv(
+    fd: FileDesc,
+    io_vec_ptr: Vaddr,
+    io_vec_count: usize,
+    ctx: &Context,
+) -> Result<usize> {
     debug!(
         "fd = {}, io_vec_ptr = 0x{:x}, io_vec_counter = 0x{:x}",
         fd, io_vec_ptr, io_vec_count
     );
 
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
 
diff --git a/kernel/aster-nix/src/syscall/prlimit64.rs b/kernel/aster-nix/src/syscall/prlimit64.rs
index a7d4df467..d83b5e180 100644
--- a/kernel/aster-nix/src/syscall/prlimit64.rs
+++ b/kernel/aster-nix/src/syscall/prlimit64.rs
@@ -11,15 +11,14 @@ pub fn sys_prlimit64(
     resource: u32,
     new_rlim_addr: Vaddr,
     old_rlim_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let resource = ResourceType::try_from(resource)?;
     debug!(
         "pid = {}, resource = {:?}, new_rlim_addr = 0x{:x}, old_rlim_addr = 0x{:x}",
         pid, resource, new_rlim_addr, old_rlim_addr
     );
-    let current = current!();
-    let mut resource_limits = current.resource_limits().lock();
+    let mut resource_limits = ctx.process.resource_limits().lock();
     if old_rlim_addr != 0 {
         let rlimit = resource_limits.get_rlimit(resource);
         CurrentUserSpace::get().write_val(old_rlim_addr, rlimit)?;
diff --git a/kernel/aster-nix/src/syscall/pselect6.rs b/kernel/aster-nix/src/syscall/pselect6.rs
index 4f8160247..c409babcc 100644
--- a/kernel/aster-nix/src/syscall/pselect6.rs
+++ b/kernel/aster-nix/src/syscall/pselect6.rs
@@ -4,10 +4,7 @@ use core::{sync::atomic::Ordering, time::Duration};
 
 use super::{select::do_sys_select, SyscallReturn};
 use crate::{
-    fs::file_table::FileDesc,
-    prelude::*,
-    process::{posix_thread::PosixThreadExt, signal::sig_mask::SigMask},
-    time::timespec_t,
+    fs::file_table::FileDesc, prelude::*, process::signal::sig_mask::SigMask, time::timespec_t,
 };
 
 pub fn sys_pselect6(
@@ -17,11 +14,8 @@ pub fn sys_pselect6(
     exceptfds_addr: Vaddr,
     timespec_addr: Vaddr,
     sigmask_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let current_thread = current_thread!();
-    let posix_thread = current_thread.as_posix_thread().unwrap();
-
     let user_space = CurrentUserSpace::get();
     let old_simask = if sigmask_addr != 0 {
         let sigmask_with_size: SigMaskWithSize = user_space.read_val(sigmask_addr)?;
@@ -29,7 +23,8 @@ pub fn sys_pselect6(
         if !sigmask_with_size.is_valid() {
             return_errno_with_message!(Errno::EINVAL, "sigmask size is invalid")
         }
-        let old_sigmask = posix_thread
+        let old_sigmask = ctx
+            .posix_thread
             .sig_mask()
             .swap(sigmask_with_size.sigmask, Ordering::Relaxed);
 
@@ -45,10 +40,19 @@ pub fn sys_pselect6(
         None
     };
 
-    let res = do_sys_select(nfds, readfds_addr, writefds_addr, exceptfds_addr, timeout);
+    let res = do_sys_select(
+        nfds,
+        readfds_addr,
+        writefds_addr,
+        exceptfds_addr,
+        timeout,
+        ctx,
+    );
 
     if let Some(old_mask) = old_simask {
-        posix_thread.sig_mask().store(old_mask, Ordering::Relaxed);
+        ctx.posix_thread
+            .sig_mask()
+            .store(old_mask, Ordering::Relaxed);
     }
 
     res
diff --git a/kernel/aster-nix/src/syscall/pwrite64.rs b/kernel/aster-nix/src/syscall/pwrite64.rs
index 76e7177b0..335545b7a 100644
--- a/kernel/aster-nix/src/syscall/pwrite64.rs
+++ b/kernel/aster-nix/src/syscall/pwrite64.rs
@@ -8,7 +8,7 @@ pub fn sys_pwrite64(
     user_buf_ptr: Vaddr,
     user_buf_len: usize,
     offset: i64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, user_buf_ptr = 0x{:x}, user_buf_len = 0x{:x}, offset = 0x{:x}",
@@ -18,8 +18,7 @@ pub fn sys_pwrite64(
         return_errno_with_message!(Errno::EINVAL, "offset cannot be negative");
     }
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
     // TODO: Check (f.file->f_mode & FMODE_PWRITE); We don't have f_mode in our FileLike trait
diff --git a/kernel/aster-nix/src/syscall/pwritev.rs b/kernel/aster-nix/src/syscall/pwritev.rs
index a0b7113ca..833025a45 100644
--- a/kernel/aster-nix/src/syscall/pwritev.rs
+++ b/kernel/aster-nix/src/syscall/pwritev.rs
@@ -7,9 +7,9 @@ pub fn sys_writev(
     fd: FileDesc,
     io_vec_ptr: Vaddr,
     io_vec_count: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let res = do_sys_writev(fd, io_vec_ptr, io_vec_count)?;
+    let res = do_sys_writev(fd, io_vec_ptr, io_vec_count, ctx)?;
     Ok(SyscallReturn::Return(res as _))
 }
 
@@ -18,9 +18,9 @@ pub fn sys_pwritev(
     io_vec_ptr: Vaddr,
     io_vec_count: usize,
     offset: i64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
-    let res = do_sys_pwritev(fd, io_vec_ptr, io_vec_count, offset, RWFFlag::empty())?;
+    let res = do_sys_pwritev(fd, io_vec_ptr, io_vec_count, offset, RWFFlag::empty(), ctx)?;
     Ok(SyscallReturn::Return(res as _))
 }
 
@@ -30,16 +30,16 @@ pub fn sys_pwritev2(
     io_vec_count: usize,
     offset: i64,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let flags = match RWFFlag::from_bits(flags) {
         Some(flags) => flags,
         None => return_errno_with_message!(Errno::EINVAL, "invalid flags"),
     };
     let res = if offset == -1 {
-        do_sys_writev(fd, io_vec_ptr, io_vec_count)?
+        do_sys_writev(fd, io_vec_ptr, io_vec_count, ctx)?
     } else {
-        do_sys_pwritev(fd, io_vec_ptr, io_vec_count, offset, flags)?
+        do_sys_pwritev(fd, io_vec_ptr, io_vec_count, offset, flags, ctx)?
     };
     Ok(SyscallReturn::Return(res as _))
 }
@@ -50,6 +50,7 @@ fn do_sys_pwritev(
     io_vec_count: usize,
     offset: i64,
     _flags: RWFFlag,
+    ctx: &Context,
 ) -> Result<usize> {
     // TODO: Implement flags support
     debug!(
@@ -60,8 +61,7 @@ fn do_sys_pwritev(
         return_errno_with_message!(Errno::EINVAL, "offset cannot be negative");
     }
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
     // TODO: Check (f.file->f_mode & FMODE_PREAD); We don't have f_mode in our FileLike trait
@@ -110,14 +110,18 @@ fn do_sys_pwritev(
     Ok(total_len)
 }
 
-fn do_sys_writev(fd: FileDesc, io_vec_ptr: Vaddr, io_vec_count: usize) -> Result<usize> {
+fn do_sys_writev(
+    fd: FileDesc,
+    io_vec_ptr: Vaddr,
+    io_vec_count: usize,
+    ctx: &Context,
+) -> Result<usize> {
     debug!(
         "fd = {}, io_vec_ptr = 0x{:x}, io_vec_counter = 0x{:x}",
         fd, io_vec_ptr, io_vec_count
     );
     let file = {
-        let current = current!();
-        let filetable = current.file_table().lock();
+        let filetable = ctx.process.file_table().lock();
         filetable.get_file(fd)?.clone()
     };
     let mut total_len = 0;
diff --git a/kernel/aster-nix/src/syscall/read.rs b/kernel/aster-nix/src/syscall/read.rs
index 1a5af9d4d..502bc2aa8 100644
--- a/kernel/aster-nix/src/syscall/read.rs
+++ b/kernel/aster-nix/src/syscall/read.rs
@@ -9,7 +9,7 @@ pub fn sys_read(
     fd: FileDesc,
     user_buf_addr: Vaddr,
     buf_len: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, user_buf_ptr = 0x{:x}, buf_len = 0x{:x}",
@@ -17,8 +17,7 @@ pub fn sys_read(
     );
 
     let file = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(fd)?.clone()
     };
 
diff --git a/kernel/aster-nix/src/syscall/readlink.rs b/kernel/aster-nix/src/syscall/readlink.rs
index 317183758..365f743f5 100644
--- a/kernel/aster-nix/src/syscall/readlink.rs
+++ b/kernel/aster-nix/src/syscall/readlink.rs
@@ -15,7 +15,7 @@ pub fn sys_readlinkat(
     path_addr: Vaddr,
     usr_buf_addr: Vaddr,
     usr_buf_len: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let path = user_space.read_cstring(path_addr, MAX_FILENAME_LEN)?;
@@ -24,14 +24,13 @@ pub fn sys_readlinkat(
         dirfd, path, usr_buf_addr, usr_buf_len
     );
 
-    let current = current!();
     let dentry = {
         let path = path.to_string_lossy();
         if path.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "path is empty");
         }
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
-        current.fs().read().lookup_no_follow(&fs_path)?
+        ctx.process.fs().read().lookup_no_follow(&fs_path)?
     };
     let linkpath = dentry.inode().read_link()?;
     let bytes = linkpath.as_bytes();
diff --git a/kernel/aster-nix/src/syscall/rename.rs b/kernel/aster-nix/src/syscall/rename.rs
index 10dd1aae2..5a117d604 100644
--- a/kernel/aster-nix/src/syscall/rename.rs
+++ b/kernel/aster-nix/src/syscall/rename.rs
@@ -16,7 +16,7 @@ pub fn sys_renameat(
     old_path_addr: Vaddr,
     new_dirfd: FileDesc,
     new_path_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let old_path = user_space.read_cstring(old_path_addr, MAX_FILENAME_LEN)?;
@@ -26,8 +26,7 @@ pub fn sys_renameat(
         old_dirfd, old_path, new_dirfd, new_path
     );
 
-    let current = current!();
-    let fs = current.fs().read();
+    let fs = ctx.process.fs().read();
 
     let (old_dir_dentry, old_name) = {
         let old_path = old_path.to_string_lossy();
diff --git a/kernel/aster-nix/src/syscall/rmdir.rs b/kernel/aster-nix/src/syscall/rmdir.rs
index a780dc996..f3c3af86b 100644
--- a/kernel/aster-nix/src/syscall/rmdir.rs
+++ b/kernel/aster-nix/src/syscall/rmdir.rs
@@ -17,19 +17,18 @@ pub fn sys_rmdir(path_addr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
 pub(super) fn sys_rmdirat(
     dirfd: FileDesc,
     path_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let path_addr = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
     debug!("dirfd = {}, path_addr = {:?}", dirfd, path_addr);
 
-    let current = current!();
     let (dir_dentry, name) = {
         let path_addr = path_addr.to_string_lossy();
         if path_addr == "/" {
             return_errno_with_message!(Errno::EBUSY, "is root directory");
         }
         let fs_path = FsPath::new(dirfd, path_addr.as_ref())?;
-        current.fs().read().lookup_dir_and_base_name(&fs_path)?
+        ctx.process.fs().read().lookup_dir_and_base_name(&fs_path)?
     };
     dir_dentry.rmdir(name.trim_end_matches('/'))?;
     Ok(SyscallReturn::Return(0))
diff --git a/kernel/aster-nix/src/syscall/rt_sigaction.rs b/kernel/aster-nix/src/syscall/rt_sigaction.rs
index 86c55383f..30ed34078 100644
--- a/kernel/aster-nix/src/syscall/rt_sigaction.rs
+++ b/kernel/aster-nix/src/syscall/rt_sigaction.rs
@@ -11,7 +11,7 @@ pub fn sys_rt_sigaction(
     sig_action_addr: Vaddr,
     old_sig_action_addr: Vaddr,
     sigset_size: u64,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let sig_num = SigNum::try_from(sig_num)?;
     debug!(
@@ -21,8 +21,7 @@ pub fn sys_rt_sigaction(
         old_sig_action_addr,
         sigset_size
     );
-    let current = current!();
-    let mut sig_dispositions = current.sig_dispositions().lock();
+    let mut sig_dispositions = ctx.process.sig_dispositions().lock();
     let old_action = sig_dispositions.get(sig_num);
     let old_action_c = old_action.as_c_type();
     if old_sig_action_addr != 0 {
diff --git a/kernel/aster-nix/src/syscall/select.rs b/kernel/aster-nix/src/syscall/select.rs
index 4ae5a8edb..f708c5e75 100644
--- a/kernel/aster-nix/src/syscall/select.rs
+++ b/kernel/aster-nix/src/syscall/select.rs
@@ -14,7 +14,7 @@ pub fn sys_select(
     writefds_addr: Vaddr,
     exceptfds_addr: Vaddr,
     timeval_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let timeout = if timeval_addr == 0 {
         None
@@ -23,7 +23,14 @@ pub fn sys_select(
         Some(Duration::from(timeval))
     };
 
-    do_sys_select(nfds, readfds_addr, writefds_addr, exceptfds_addr, timeout)
+    do_sys_select(
+        nfds,
+        readfds_addr,
+        writefds_addr,
+        exceptfds_addr,
+        timeout,
+        ctx,
+    )
 }
 
 pub fn do_sys_select(
@@ -32,6 +39,7 @@ pub fn do_sys_select(
     writefds_addr: Vaddr,
     exceptfds_addr: Vaddr,
     timeout: Option<Duration>,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     if nfds < 0 || nfds as usize > FD_SETSIZE {
         return_errno_with_message!(Errno::EINVAL, "nfds is negative or exceeds the FD_SETSIZE");
@@ -62,6 +70,7 @@ pub fn do_sys_select(
         writefds.as_mut(),
         exceptfds.as_mut(),
         timeout,
+        ctx,
     )?;
 
     // FIXME: The Linux select() and pselect6() system call
@@ -89,6 +98,7 @@ fn do_select(
     mut writefds: Option<&mut FdSet>,
     mut exceptfds: Option<&mut FdSet>,
     timeout: Option<Duration>,
+    ctx: &Context,
 ) -> Result<usize> {
     // Convert the FdSet to an array of PollFd
     let poll_fds = {
@@ -123,7 +133,7 @@ fn do_select(
     }
 
     // Do the poll syscall that is equivalent to the select syscall
-    let num_revents = do_poll(&poll_fds, timeout)?;
+    let num_revents = do_poll(&poll_fds, timeout, ctx)?;
     if num_revents == 0 {
         return Ok(0);
     }
diff --git a/kernel/aster-nix/src/syscall/sendfile.rs b/kernel/aster-nix/src/syscall/sendfile.rs
index 24031c78b..74de7fa41 100644
--- a/kernel/aster-nix/src/syscall/sendfile.rs
+++ b/kernel/aster-nix/src/syscall/sendfile.rs
@@ -8,7 +8,7 @@ pub fn sys_sendfile(
     in_fd: FileDesc,
     offset_ptr: Vaddr,
     count: isize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     trace!("raw offset ptr = 0x{:x}", offset_ptr);
 
@@ -34,8 +34,7 @@ pub fn sys_sendfile(
     };
 
     let (out_file, in_file) = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         let out_file = file_table.get_file(out_fd)?.clone();
         // FIXME: the in_file must support mmap-like operations (i.e., it cannot be a socket).
         let in_file = file_table.get_file(in_fd)?.clone();
diff --git a/kernel/aster-nix/src/syscall/set_get_priority.rs b/kernel/aster-nix/src/syscall/set_get_priority.rs
index 7d3ee8452..4c359c117 100644
--- a/kernel/aster-nix/src/syscall/set_get_priority.rs
+++ b/kernel/aster-nix/src/syscall/set_get_priority.rs
@@ -9,8 +9,8 @@ use crate::{
     sched::nice::Nice,
 };
 
-pub fn sys_set_priority(which: i32, who: u32, prio: i32, _ctx: &Context) -> Result<SyscallReturn> {
-    let prio_target = PriorityTarget::new(which, who)?;
+pub fn sys_set_priority(which: i32, who: u32, prio: i32, ctx: &Context) -> Result<SyscallReturn> {
+    let prio_target = PriorityTarget::new(which, who, ctx)?;
     let new_nice = {
         let norm_prio = prio.clamp(i8::MIN as i32, i8::MAX as i32) as i8;
         Nice::new(norm_prio)
@@ -29,8 +29,8 @@ pub fn sys_set_priority(which: i32, who: u32, prio: i32, _ctx: &Context) -> Resu
     Ok(SyscallReturn::Return(0))
 }
 
-pub fn sys_get_priority(which: i32, who: u32, _ctx: &Context) -> Result<SyscallReturn> {
-    let prio_target = PriorityTarget::new(which, who)?;
+pub fn sys_get_priority(which: i32, who: u32, ctx: &Context) -> Result<SyscallReturn> {
+    let prio_target = PriorityTarget::new(which, who, ctx)?;
     debug!("get_priority prio_target: {:?}", prio_target);
 
     let processes = get_processes(prio_target)?;
@@ -98,13 +98,13 @@ enum PriorityTarget {
 }
 
 impl PriorityTarget {
-    fn new(which: i32, who: u32) -> Result<Self> {
+    fn new(which: i32, who: u32, ctx: &Context) -> Result<Self> {
         let which = Which::try_from(which)
             .map_err(|_| Error::with_message(Errno::EINVAL, "invalid which value"))?;
         Ok(match which {
             Which::PRIO_PROCESS => {
                 let pid = if who == 0 {
-                    current!().pid()
+                    ctx.process.pid()
                 } else {
                     who as Pid
                 };
@@ -112,7 +112,7 @@ impl PriorityTarget {
             }
             Which::PRIO_PGRP => {
                 let pgid = if who == 0 {
-                    current!().pgid()
+                    ctx.process.pgid()
                 } else {
                     who as Pgid
                 };
@@ -120,11 +120,7 @@ impl PriorityTarget {
             }
             Which::PRIO_USER => {
                 let uid = if who == 0 {
-                    current_thread!()
-                        .as_posix_thread()
-                        .unwrap()
-                        .credentials()
-                        .ruid()
+                    ctx.posix_thread.credentials().ruid()
                 } else {
                     Uid::new(who)
                 };
diff --git a/kernel/aster-nix/src/syscall/setitimer.rs b/kernel/aster-nix/src/syscall/setitimer.rs
index 380b66d8d..0b1ea7d72 100644
--- a/kernel/aster-nix/src/syscall/setitimer.rs
+++ b/kernel/aster-nix/src/syscall/setitimer.rs
@@ -22,7 +22,7 @@ pub fn sys_setitimer(
     itimer_type: i32,
     new_itimerval_addr: Vaddr,
     old_itimerval_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "itimer_type = {}, new_itimerval_addr = 0x{:x}, old_itimerval_addr = 0x{:x}, ",
@@ -32,13 +32,12 @@ pub fn sys_setitimer(
     if new_itimerval_addr == 0 {
         return_errno_with_message!(Errno::EINVAL, "invalid pointer to new value");
     }
-    let current = current!();
     let user_space = CurrentUserSpace::get();
     let new_itimerval = user_space.read_val::<itimerval_t>(new_itimerval_addr)?;
     let interval = Duration::from(new_itimerval.it_interval);
     let expire_time = Duration::from(new_itimerval.it_value);
 
-    let process_timer_manager = current.timer_manager();
+    let process_timer_manager = ctx.process.timer_manager();
     let timer = match ItimerType::try_from(itimer_type)? {
         ItimerType::ITIMER_REAL => process_timer_manager.alarm_timer(),
         ItimerType::ITIMER_VIRTUAL => process_timer_manager.virtual_timer(),
@@ -69,7 +68,7 @@ pub fn sys_setitimer(
 pub fn sys_getitimer(
     itimer_type: i32,
     itimerval_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "itimer_type = {}, itimerval_addr = 0x{:x}",
@@ -80,8 +79,7 @@ pub fn sys_getitimer(
         return_errno_with_message!(Errno::EINVAL, "invalid pointer to itimerval");
     }
 
-    let current = current!();
-    let process_timer_manager = current.timer_manager();
+    let process_timer_manager = ctx.process.timer_manager();
     let timer = match ItimerType::try_from(itimer_type)? {
         ItimerType::ITIMER_REAL => process_timer_manager.alarm_timer(),
         ItimerType::ITIMER_VIRTUAL => process_timer_manager.virtual_timer(),
diff --git a/kernel/aster-nix/src/syscall/setpgid.rs b/kernel/aster-nix/src/syscall/setpgid.rs
index 6afd2bd82..991538a41 100644
--- a/kernel/aster-nix/src/syscall/setpgid.rs
+++ b/kernel/aster-nix/src/syscall/setpgid.rs
@@ -6,8 +6,8 @@ use crate::{
     process::{process_table, Pgid, Pid},
 };
 
-pub fn sys_setpgid(pid: Pid, pgid: Pgid, _ctx: &Context) -> Result<SyscallReturn> {
-    let current = current!();
+pub fn sys_setpgid(pid: Pid, pgid: Pgid, ctx: &Context) -> Result<SyscallReturn> {
+    let current = ctx.process;
     // if pid is 0, pid should be the pid of current process
     let pid = if pid == 0 { current.pid() } else { pid };
     // if pgid is 0, pgid should be pid
diff --git a/kernel/aster-nix/src/syscall/socket.rs b/kernel/aster-nix/src/syscall/socket.rs
index d01d138e4..9bc51756c 100644
--- a/kernel/aster-nix/src/syscall/socket.rs
+++ b/kernel/aster-nix/src/syscall/socket.rs
@@ -12,7 +12,7 @@ use crate::{
     util::net::{CSocketAddrFamily, Protocol, SockFlags, SockType, SOCK_TYPE_MASK},
 };
 
-pub fn sys_socket(domain: i32, type_: i32, protocol: i32, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_socket(domain: i32, type_: i32, protocol: i32, ctx: &Context) -> Result<SyscallReturn> {
     let domain = CSocketAddrFamily::try_from(domain)?;
     let sock_type = SockType::try_from(type_ & SOCK_TYPE_MASK)?;
     let sock_flags = SockFlags::from_bits_truncate(type_ & !SOCK_TYPE_MASK);
@@ -43,8 +43,7 @@ pub fn sys_socket(domain: i32, type_: i32, protocol: i32, _ctx: &Context) -> Res
         _ => return_errno_with_message!(Errno::EAFNOSUPPORT, "unsupported domain"),
     };
     let fd = {
-        let current = current!();
-        let mut file_table = current.file_table().lock();
+        let mut file_table = ctx.process.file_table().lock();
         let fd_flags = if sock_flags.contains(SockFlags::SOCK_CLOEXEC) {
             FdFlags::CLOEXEC
         } else {
diff --git a/kernel/aster-nix/src/syscall/socketpair.rs b/kernel/aster-nix/src/syscall/socketpair.rs
index 921c10864..9ec9fa272 100644
--- a/kernel/aster-nix/src/syscall/socketpair.rs
+++ b/kernel/aster-nix/src/syscall/socketpair.rs
@@ -13,7 +13,7 @@ pub fn sys_socketpair(
     type_: i32,
     protocol: i32,
     sv: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let domain = CSocketAddrFamily::try_from(domain)?;
     let sock_type = SockType::try_from(type_ & SOCK_TYPE_MASK)?;
@@ -37,8 +37,7 @@ pub fn sys_socketpair(
     };
 
     let socket_fds = {
-        let current = current!();
-        let mut file_table = current.file_table().lock();
+        let mut file_table = ctx.process.file_table().lock();
         let fd_flags = if sock_flags.contains(SockFlags::SOCK_CLOEXEC) {
             FdFlags::CLOEXEC
         } else {
diff --git a/kernel/aster-nix/src/syscall/stat.rs b/kernel/aster-nix/src/syscall/stat.rs
index 69b2c9ce4..136c93e5f 100644
--- a/kernel/aster-nix/src/syscall/stat.rs
+++ b/kernel/aster-nix/src/syscall/stat.rs
@@ -12,11 +12,10 @@ use crate::{
     time::timespec_t,
 };
 
-pub fn sys_fstat(fd: FileDesc, stat_buf_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fstat(fd: FileDesc, stat_buf_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, stat_buf_addr = 0x{:x}", fd, stat_buf_ptr);
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     let stat = Stat::from(file.metadata());
     CurrentUserSpace::get().write_val(stat_buf_ptr, &stat)?;
@@ -61,11 +60,10 @@ pub fn sys_fstatat(
         return self::sys_fstat(dirfd, stat_buf_ptr, ctx);
     }
 
-    let current = current!();
     let dentry = {
         let filename = filename.to_string_lossy();
         let fs_path = FsPath::new(dirfd, filename.as_ref())?;
-        let fs = current.fs().read();
+        let fs = ctx.process.fs().read();
         if flags.contains(StatFlags::AT_SYMLINK_NOFOLLOW) {
             fs.lookup_no_follow(&fs_path)?
         } else {
diff --git a/kernel/aster-nix/src/syscall/statfs.rs b/kernel/aster-nix/src/syscall/statfs.rs
index 0228821b2..65d5d2014 100644
--- a/kernel/aster-nix/src/syscall/statfs.rs
+++ b/kernel/aster-nix/src/syscall/statfs.rs
@@ -11,27 +11,25 @@ use crate::{
     prelude::*,
 };
 
-pub fn sys_statfs(path_ptr: Vaddr, statfs_buf_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_statfs(path_ptr: Vaddr, statfs_buf_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let path = user_space.read_cstring(path_ptr, PATH_MAX)?;
     debug!("path = {:?}, statfs_buf_ptr = 0x{:x}", path, statfs_buf_ptr,);
 
-    let current = current!();
     let dentry = {
         let path = path.to_string_lossy();
         let fs_path = FsPath::try_from(path.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
     let statfs = Statfs::from(dentry.fs().sb());
     user_space.write_val(statfs_buf_ptr, &statfs)?;
     Ok(SyscallReturn::Return(0))
 }
 
-pub fn sys_fstatfs(fd: FileDesc, statfs_buf_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_fstatfs(fd: FileDesc, statfs_buf_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, statfs_buf_addr = 0x{:x}", fd, statfs_buf_ptr);
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     let inode_handle = file
         .downcast_ref::<InodeHandle>()
diff --git a/kernel/aster-nix/src/syscall/symlink.rs b/kernel/aster-nix/src/syscall/symlink.rs
index 0aeec9b75..e020f698e 100644
--- a/kernel/aster-nix/src/syscall/symlink.rs
+++ b/kernel/aster-nix/src/syscall/symlink.rs
@@ -15,7 +15,7 @@ pub fn sys_symlinkat(
     target_addr: Vaddr,
     dirfd: FileDesc,
     linkpath_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let user_space = CurrentUserSpace::get();
     let target = user_space.read_cstring(target_addr, MAX_FILENAME_LEN)?;
@@ -25,7 +25,6 @@ pub fn sys_symlinkat(
         target, dirfd, linkpath
     );
 
-    let current = current!();
     let target = target.to_string_lossy();
     if target.is_empty() {
         return_errno_with_message!(Errno::ENOENT, "target is empty");
@@ -36,7 +35,7 @@ pub fn sys_symlinkat(
             return_errno_with_message!(Errno::ENOENT, "linkpath is empty");
         }
         let fs_path = FsPath::new(dirfd, linkpath.as_ref())?;
-        current
+        ctx.process
             .fs()
             .read()
             .lookup_dir_and_new_basename(&fs_path, false)?
diff --git a/kernel/aster-nix/src/syscall/tgkill.rs b/kernel/aster-nix/src/syscall/tgkill.rs
index 24a88b739..15b7c9f39 100644
--- a/kernel/aster-nix/src/syscall/tgkill.rs
+++ b/kernel/aster-nix/src/syscall/tgkill.rs
@@ -24,7 +24,7 @@ pub fn sys_tgkill(tgid: Pid, tid: Tid, sig_num: u8, ctx: &Context) -> Result<Sys
     debug!("tgid = {}, pid = {}, sig_num = {:?}", tgid, tid, sig_num);
 
     let signal = sig_num.map(|sig_num| {
-        let pid = current!().pid();
+        let pid = ctx.process.pid();
         let uid = ctx.posix_thread.credentials().ruid();
         UserSignal::new(sig_num, UserSignalKind::Tkill, pid, uid)
     });
diff --git a/kernel/aster-nix/src/syscall/timer_settime.rs b/kernel/aster-nix/src/syscall/timer_settime.rs
index 1382fd3e3..88034985d 100644
--- a/kernel/aster-nix/src/syscall/timer_settime.rs
+++ b/kernel/aster-nix/src/syscall/timer_settime.rs
@@ -13,7 +13,7 @@ pub fn sys_timer_settime(
     flags: i32,
     new_itimerspec_addr: Vaddr,
     old_itimerspec_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     if new_itimerspec_addr == 0 {
         return_errno_with_message!(Errno::EINVAL, "invalid pointer to new value");
@@ -24,8 +24,7 @@ pub fn sys_timer_settime(
     let interval = Duration::try_from(new_itimerspec.it_interval)?;
     let expire_time = Duration::try_from(new_itimerspec.it_value)?;
 
-    let current_process = current!();
-    let Some(timer) = current_process.timer_manager().find_posix_timer(timer_id) else {
+    let Some(timer) = ctx.process.timer_manager().find_posix_timer(timer_id) else {
         return_errno_with_message!(Errno::EINVAL, "invalid timer ID");
     };
 
@@ -60,13 +59,12 @@ pub fn sys_timer_settime(
 pub fn sys_timer_gettime(
     timer_id: usize,
     itimerspec_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     if itimerspec_addr == 0 {
         return_errno_with_message!(Errno::EINVAL, "invalid pointer to return value");
     }
-    let current_process = current!();
-    let Some(timer) = current_process.timer_manager().find_posix_timer(timer_id) else {
+    let Some(timer) = ctx.process.timer_manager().find_posix_timer(timer_id) else {
         return_errno_with_message!(Errno::EINVAL, "invalid timer ID");
     };
 
diff --git a/kernel/aster-nix/src/syscall/truncate.rs b/kernel/aster-nix/src/syscall/truncate.rs
index ab4141c41..136f6a6ce 100644
--- a/kernel/aster-nix/src/syscall/truncate.rs
+++ b/kernel/aster-nix/src/syscall/truncate.rs
@@ -11,46 +11,43 @@ use crate::{
     process::ResourceType,
 };
 
-pub fn sys_ftruncate(fd: FileDesc, len: isize, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_ftruncate(fd: FileDesc, len: isize, ctx: &Context) -> Result<SyscallReturn> {
     debug!("fd = {}, lentgh = {}", fd, len);
 
-    check_length(len)?;
+    check_length(len, ctx)?;
 
-    let current = current!();
-    let file_table = current.file_table().lock();
+    let file_table = ctx.process.file_table().lock();
     let file = file_table.get_file(fd)?;
     file.resize(len as usize)?;
     Ok(SyscallReturn::Return(0))
 }
 
-pub fn sys_truncate(path_ptr: Vaddr, len: isize, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_truncate(path_ptr: Vaddr, len: isize, ctx: &Context) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_ptr, PATH_MAX)?;
     debug!("path = {:?}, length = {}", path, len);
 
-    check_length(len)?;
+    check_length(len, ctx)?;
 
-    let current = current!();
     let dir_dentry = {
         let path = path.to_string_lossy();
         if path.is_empty() {
             return_errno_with_message!(Errno::ENOENT, "path is empty");
         }
         let fs_path = FsPath::new(AT_FDCWD, path.as_ref())?;
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
     dir_dentry.resize(len as usize)?;
     Ok(SyscallReturn::Return(0))
 }
 
 #[inline]
-fn check_length(len: isize) -> Result<()> {
+fn check_length(len: isize, ctx: &Context) -> Result<()> {
     if len < 0 {
         return_errno_with_message!(Errno::EINVAL, "length is negative");
     }
 
     let max_file_size = {
-        let current = current!();
-        let resource_limits = current.resource_limits().lock();
+        let resource_limits = ctx.process.resource_limits().lock();
         resource_limits
             .get_rlimit(ResourceType::RLIMIT_FSIZE)
             .get_cur() as usize
diff --git a/kernel/aster-nix/src/syscall/umask.rs b/kernel/aster-nix/src/syscall/umask.rs
index 1429e333c..d9df5d3bd 100644
--- a/kernel/aster-nix/src/syscall/umask.rs
+++ b/kernel/aster-nix/src/syscall/umask.rs
@@ -3,9 +3,8 @@
 use super::SyscallReturn;
 use crate::prelude::*;
 
-pub fn sys_umask(mask: u16, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_umask(mask: u16, ctx: &Context) -> Result<SyscallReturn> {
     debug!("mask = 0o{:o}", mask);
-    let current = current!();
-    let old_mask = current.umask().write().set(mask);
+    let old_mask = ctx.process.umask().write().set(mask);
     Ok(SyscallReturn::Return(old_mask as _))
 }
diff --git a/kernel/aster-nix/src/syscall/umount.rs b/kernel/aster-nix/src/syscall/umount.rs
index 22b991274..630b28460 100644
--- a/kernel/aster-nix/src/syscall/umount.rs
+++ b/kernel/aster-nix/src/syscall/umount.rs
@@ -7,14 +7,13 @@ use crate::{
     syscall::constants::MAX_FILENAME_LEN,
 };
 
-pub fn sys_umount(path_addr: Vaddr, flags: u64, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_umount(path_addr: Vaddr, flags: u64, ctx: &Context) -> Result<SyscallReturn> {
     let path = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
     let umount_flags = UmountFlags::from_bits_truncate(flags as u32);
     debug!("path = {:?}, flags = {:?}", path, umount_flags);
 
     umount_flags.check_unsupported_flags()?;
 
-    let current = current!();
     let path = path.to_string_lossy();
     if path.is_empty() {
         return_errno_with_message!(Errno::ENOENT, "path is empty");
@@ -22,9 +21,9 @@ pub fn sys_umount(path_addr: Vaddr, flags: u64, _ctx: &Context) -> Result<Syscal
     let fs_path = FsPath::new(AT_FDCWD, path.as_ref())?;
 
     let target_dentry = if umount_flags.contains(UmountFlags::UMOUNT_NOFOLLOW) {
-        current.fs().read().lookup_no_follow(&fs_path)?
+        ctx.process.fs().read().lookup_no_follow(&fs_path)?
     } else {
-        current.fs().read().lookup(&fs_path)?
+        ctx.process.fs().read().lookup(&fs_path)?
     };
 
     target_dentry.unmount()?;
diff --git a/kernel/aster-nix/src/syscall/unlink.rs b/kernel/aster-nix/src/syscall/unlink.rs
index fa6dcf119..9a338ce62 100644
--- a/kernel/aster-nix/src/syscall/unlink.rs
+++ b/kernel/aster-nix/src/syscall/unlink.rs
@@ -25,7 +25,6 @@ pub fn sys_unlinkat(
     let path = CurrentUserSpace::get().read_cstring(path_addr, MAX_FILENAME_LEN)?;
     debug!("dirfd = {}, path = {:?}", dirfd, path);
 
-    let current = current!();
     let (dir_dentry, name) = {
         let path = path.to_string_lossy();
         if path.is_empty() {
@@ -35,7 +34,7 @@ pub fn sys_unlinkat(
             return_errno_with_message!(Errno::EISDIR, "unlink on directory");
         }
         let fs_path = FsPath::new(dirfd, path.as_ref())?;
-        current.fs().read().lookup_dir_and_base_name(&fs_path)?
+        ctx.process.fs().read().lookup_dir_and_base_name(&fs_path)?
     };
     dir_dentry.unlink(&name)?;
     Ok(SyscallReturn::Return(0))
diff --git a/kernel/aster-nix/src/syscall/utimens.rs b/kernel/aster-nix/src/syscall/utimens.rs
index 15823a141..9bb94947c 100644
--- a/kernel/aster-nix/src/syscall/utimens.rs
+++ b/kernel/aster-nix/src/syscall/utimens.rs
@@ -23,7 +23,7 @@ pub fn sys_utimensat(
     pathname_ptr: Vaddr,
     timespecs_ptr: Vaddr,
     flags: u32,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "utimensat: dirfd: {}, pathname_ptr: {:#x}, timespecs_ptr: {:#x}, flags: {:#x}",
@@ -41,7 +41,7 @@ pub fn sys_utimensat(
     } else {
         None
     };
-    do_utimes(dirfd, pathname_ptr, times, flags)
+    do_utimes(dirfd, pathname_ptr, times, flags, ctx)
 }
 
 /// The 'sys_futimesat' system call sets the access and modification times of a file.
@@ -51,32 +51,28 @@ pub fn sys_futimesat(
     dirfd: FileDesc,
     pathname_ptr: Vaddr,
     timeval_ptr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "futimesat: dirfd: {}, pathname_ptr: {:#x}, timeval_ptr: {:#x}",
         dirfd, pathname_ptr, timeval_ptr
     );
-    do_futimesat(dirfd, pathname_ptr, timeval_ptr)
+    do_futimesat(dirfd, pathname_ptr, timeval_ptr, ctx)
 }
 
 /// The 'sys_utimes' system call sets the access and modification times of a file.
 /// It receives time values in the form of timeval structures like 'sys_futimesat',
 /// but it uses the current working directory as the base directory.
-pub fn sys_utimes(
-    pathname_ptr: Vaddr,
-    timeval_ptr: Vaddr,
-    _ctx: &Context,
-) -> Result<SyscallReturn> {
+pub fn sys_utimes(pathname_ptr: Vaddr, timeval_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     debug!(
         "utimes: pathname_ptr: {:#x}, timeval_ptr: {:#x}",
         pathname_ptr, timeval_ptr
     );
-    do_futimesat(AT_FDCWD, pathname_ptr, timeval_ptr)
+    do_futimesat(AT_FDCWD, pathname_ptr, timeval_ptr, ctx)
 }
 
 /// The 'sys_utime' system call is similar to 'sys_utimes' but uses the older 'utimbuf' structure to specify times.
-pub fn sys_utime(pathname_ptr: Vaddr, utimbuf_ptr: Vaddr, _ctx: &Context) -> Result<SyscallReturn> {
+pub fn sys_utime(pathname_ptr: Vaddr, utimbuf_ptr: Vaddr, ctx: &Context) -> Result<SyscallReturn> {
     debug!(
         "utime: pathname_ptr: {:#x}, utimbuf_ptr: {:#x}",
         pathname_ptr, utimbuf_ptr
@@ -95,7 +91,7 @@ pub fn sys_utime(pathname_ptr: Vaddr, utimbuf_ptr: Vaddr, _ctx: &Context) -> Res
     } else {
         None
     };
-    do_utimes(AT_FDCWD, pathname_ptr, times, 0)
+    do_utimes(AT_FDCWD, pathname_ptr, times, 0, ctx)
 }
 
 // Structure to hold access and modification times
@@ -156,6 +152,7 @@ fn do_utimes(
     pathname_ptr: Vaddr,
     times: Option<TimeSpecPair>,
     flags: u32,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let flags = UtimensFlags::from_bits(flags)
         .ok_or(Error::with_message(Errno::EINVAL, "invalid flags"))?;
@@ -166,11 +163,10 @@ fn do_utimes(
         let cstring = CurrentUserSpace::get().read_cstring(pathname_ptr, MAX_FILENAME_LEN)?;
         cstring.to_string_lossy().into_owned()
     };
-    let current = current!();
     let dentry = {
         // Determine the file system path and the corresponding entry
         let fs_path = FsPath::new(dirfd, pathname.as_ref())?;
-        let fs = current.fs().read();
+        let fs = ctx.process.fs().read();
         if flags.contains(UtimensFlags::AT_SYMLINK_NOFOLLOW) {
             fs.lookup_no_follow(&fs_path)?
         } else {
@@ -183,7 +179,12 @@ fn do_utimes(
 
 // Sets the access and modification times for a file,
 // specified by a pathname relative to the directory file descriptor `dirfd`.
-fn do_futimesat(dirfd: FileDesc, pathname_ptr: Vaddr, timeval_ptr: Vaddr) -> Result<SyscallReturn> {
+fn do_futimesat(
+    dirfd: FileDesc,
+    pathname_ptr: Vaddr,
+    timeval_ptr: Vaddr,
+    ctx: &Context,
+) -> Result<SyscallReturn> {
     let times = if timeval_ptr != 0 {
         let (autime, mutime) = read_time_from_user::<timeval_t>(timeval_ptr)?;
         if autime.usec >= 1000000 || autime.usec < 0 || mutime.usec >= 1000000 || mutime.usec < 0 {
@@ -197,7 +198,7 @@ fn do_futimesat(dirfd: FileDesc, pathname_ptr: Vaddr, timeval_ptr: Vaddr) -> Res
     } else {
         None
     };
-    do_utimes(dirfd, pathname_ptr, times, 0)
+    do_utimes(dirfd, pathname_ptr, times, 0, ctx)
 }
 
 fn read_time_from_user<T: Pod>(time_ptr: Vaddr) -> Result<(T, T)> {
diff --git a/kernel/aster-nix/src/syscall/wait4.rs b/kernel/aster-nix/src/syscall/wait4.rs
index 52828e48a..c0d4f413d 100644
--- a/kernel/aster-nix/src/syscall/wait4.rs
+++ b/kernel/aster-nix/src/syscall/wait4.rs
@@ -11,7 +11,7 @@ pub fn sys_wait4(
     exit_status_ptr: u64,
     wait_options: u32,
     rusage_addr: Vaddr,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     let wait_options = WaitOptions::from_bits(wait_options)
         .ok_or_else(|| Error::with_message(Errno::EINVAL, "unknown wait option"))?;
@@ -19,7 +19,7 @@ pub fn sys_wait4(
         "pid = {}, exit_status_ptr = {}, wait_options: {:?}",
         wait_pid as i32, exit_status_ptr, wait_options
     );
-    debug!("wait4 current pid = {}", current!().pid());
+    debug!("wait4 current pid = {}", ctx.process.pid());
     let process_filter = ProcessFilter::from_id(wait_pid as _);
 
     let waited_process = wait_child_exit(process_filter, wait_options)?;
diff --git a/kernel/aster-nix/src/syscall/write.rs b/kernel/aster-nix/src/syscall/write.rs
index bed036ad7..992a6e240 100644
--- a/kernel/aster-nix/src/syscall/write.rs
+++ b/kernel/aster-nix/src/syscall/write.rs
@@ -7,7 +7,7 @@ pub fn sys_write(
     fd: FileDesc,
     user_buf_ptr: Vaddr,
     user_buf_len: usize,
-    _ctx: &Context,
+    ctx: &Context,
 ) -> Result<SyscallReturn> {
     debug!(
         "fd = {}, user_buf_ptr = 0x{:x}, user_buf_len = 0x{:x}",
@@ -15,8 +15,7 @@ pub fn sys_write(
     );
 
     let file = {
-        let current = current!();
-        let file_table = current.file_table().lock();
+        let file_table = ctx.process.file_table().lock();
         file_table.get_file(fd)?.clone()
     };