diff --git a/crate/process/src/interrupt.rs b/crate/process/src/interrupt.rs
index f75102e..e0f2283 100644
--- a/crate/process/src/interrupt.rs
+++ b/crate/process/src/interrupt.rs
@@ -26,4 +26,19 @@ pub unsafe fn restore(flags: usize) {
 #[cfg(target_arch = "riscv32")]
 pub unsafe fn restore(flags: usize) {
     asm!("csrs 0x100, $0" :: "r"(flags));
-}
\ No newline at end of file
+}
+
+#[inline(always)]
+#[cfg(target_arch = "aarch64")]
+pub unsafe fn disable_and_store() -> usize {
+    let daif: u32;
+    asm!("mrs $0, DAIF": "=r"(daif) ::: "volatile");
+    asm!("msr daifset, #2");
+    daif as usize
+}
+
+#[inline(always)]
+#[cfg(target_arch = "aarch64")]
+pub unsafe fn restore(flags: usize) {
+    asm!("msr DAIF, $0" :: "r"(flags as u32) :: "volatile");
+}
diff --git a/kernel/Makefile b/kernel/Makefile
index 6a26d8c..0e1a2e8 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -4,7 +4,7 @@
 # 	make justrun				Run the last build
 # 	make doc					Generate docs
 # 	make asm					Open the deassemble file of the last build
-# 	make elf-h					Open 'objdump -h' of the last build
+# 	make header					Open 'objdump -h' of the last build
 # 	make clean					Clean
 #
 # Options:
@@ -18,7 +18,6 @@
 
 arch ?= riscv32
 board ?= raspi3
-prefix ?= $(arch)-none-elf
 mode ?= debug
 LOG  ?= debug
 smp  ?= 4
@@ -83,12 +82,22 @@ endif
 
 
 ### prefix ###
-ld := $(prefix)-ld
-objdump := $(prefix)-objdump
-objcopy := $(prefix)-objcopy
-cc := $(prefix)-gcc
-as := $(prefix)-as
-gdb := $(prefix)-gdb
+ifeq ($(arch), x86_64)
+ifeq ($(uname), Darwin)
+prefix := x86_64-elf-
+endif
+else ifeq ($(arch), riscv32)
+prefix := riscv64-unknown-elf-
+else ifeq ($(arch), aarch64)
+prefix ?= aarch64-none-elf-
+endif
+
+ld := $(prefix)ld
+objdump := $(prefix)objdump
+objcopy := $(prefix)objcopy
+cc := $(prefix)gcc
+as := $(prefix)as
+gdb := $(prefix)gdb
 
 .PHONY: all clean run build asm doc justrun kernel
 
@@ -144,7 +153,7 @@ else
 	cp bbl ../../kernel/$@
 endif
 else ifeq ($(arch), aarch64)
-	$(objcopy) $(kernel) --strip-all -O binary $@
+	@$(objcopy) $(kernel) --strip-all -O binary $@
 endif
 
 kernel:
diff --git a/kernel/src/arch/aarch64/board/raspi3/irq.rs b/kernel/src/arch/aarch64/board/raspi3/irq.rs
index e01a2c3..c78b651 100644
--- a/kernel/src/arch/aarch64/board/raspi3/irq.rs
+++ b/kernel/src/arch/aarch64/board/raspi3/irq.rs
@@ -1,11 +1,11 @@
-use arch::interrupt::TrapFrame;
-use super::bcm2837::timer::Timer;
-use super::bcm2837::interrupt::{Controller, Interrupt};
+use crate::arch::interrupt::TrapFrame;
+use bcm2837::timer::Timer;
+use bcm2837::interrupt::{Controller, Interrupt};
 
 pub fn handle_irq(tf: &mut TrapFrame) {
     let controller = Timer::new();
     if controller.is_pending() {
         super::timer::set_next();
-        ::trap::timer();
+        crate::trap::timer();
     }
 }
diff --git a/kernel/src/arch/aarch64/board/raspi3/mod.rs b/kernel/src/arch/aarch64/board/raspi3/mod.rs
index 2b32a10..4276dd9 100644
--- a/kernel/src/arch/aarch64/board/raspi3/mod.rs
+++ b/kernel/src/arch/aarch64/board/raspi3/mod.rs
@@ -1,7 +1,5 @@
 //! Raspberry PI 3 Model B/B+
 
-extern crate bcm2837;
-
 pub mod irq;
 pub mod timer;
 pub mod serial;
diff --git a/kernel/src/arch/aarch64/board/raspi3/serial.rs b/kernel/src/arch/aarch64/board/raspi3/serial.rs
index 5434071..5170195 100644
--- a/kernel/src/arch/aarch64/board/raspi3/serial.rs
+++ b/kernel/src/arch/aarch64/board/raspi3/serial.rs
@@ -1,5 +1,4 @@
-use super::bcm2837::mini_uart::MiniUart;
-
+use bcm2837::mini_uart::MiniUart;
 use core::fmt;
 use spin::Mutex;
 
diff --git a/kernel/src/arch/aarch64/board/raspi3/timer.rs b/kernel/src/arch/aarch64/board/raspi3/timer.rs
index 4cc0be0..9a51d31 100644
--- a/kernel/src/arch/aarch64/board/raspi3/timer.rs
+++ b/kernel/src/arch/aarch64/board/raspi3/timer.rs
@@ -1,5 +1,6 @@
-use super::bcm2837::timer;
-use super::bcm2837::interrupt::{Controller, Interrupt};
+use bcm2837::timer;
+use bcm2837::interrupt::{Controller, Interrupt};
+use log::*;
 
 pub fn init() {
     timer::init();
diff --git a/kernel/src/arch/aarch64/cpu.rs b/kernel/src/arch/aarch64/cpu.rs
new file mode 100644
index 0000000..8dd916f
--- /dev/null
+++ b/kernel/src/arch/aarch64/cpu.rs
@@ -0,0 +1,8 @@
+pub fn halt() {
+    unsafe { asm!("wfi" :::: "volatile") }
+}
+
+pub fn id() -> usize {
+    // TODO: cpu id
+    0
+}
\ No newline at end of file
diff --git a/kernel/src/arch/aarch64/interrupt/context.rs b/kernel/src/arch/aarch64/interrupt/context.rs
index df2b5b3..e494453 100644
--- a/kernel/src/arch/aarch64/interrupt/context.rs
+++ b/kernel/src/arch/aarch64/interrupt/context.rs
@@ -148,4 +148,10 @@ impl Context {
             },
         }.push_at(kstack_top)
     }
+    /// Called at a new user context
+    /// To get the init TrapFrame in sys_exec
+    pub unsafe fn get_init_tf(&self) -> TrapFrame {
+        (*(self.0 as *const InitStack)).tf.clone()
+    }
+
 }
diff --git a/kernel/src/arch/aarch64/interrupt/handler.rs b/kernel/src/arch/aarch64/interrupt/handler.rs
index 85d1faf..e4a768c 100644
--- a/kernel/src/arch/aarch64/interrupt/handler.rs
+++ b/kernel/src/arch/aarch64/interrupt/handler.rs
@@ -1,8 +1,9 @@
 //! Trap handler
 
-use arch::board::irq::handle_irq;
+use crate::arch::board::irq::handle_irq;
 use super::context::TrapFrame;
 use super::syndrome::Syndrome;
+use log::*;
 
 global_asm!(include_str!("trap.S"));
 global_asm!(include_str!("vector.S"));
@@ -46,13 +47,12 @@ pub extern "C" fn rust_trap(info: Info, esr: u32, tf: &mut TrapFrame) {
             match syndrome {
                 Syndrome::Brk(brk) => handle_break(brk, tf),
                 Syndrome::Svc(_) => handle_syscall(tf),
-                _ => ::trap::error(tf),
+                _ => crate::trap::error(tf),
             }
         }
         Kind::Irq => handle_irq(tf),
-        _ => ::trap::error(tf),
+        _ => crate::trap::error(tf),
     }
-    ::trap::before_return();
     trace!("Interrupt end");
 }
 
@@ -63,7 +63,7 @@ fn handle_break(num: u16, tf: &mut TrapFrame) {
 
 fn handle_syscall(tf: &mut TrapFrame) {
     // svc instruction has been skipped in syscall (ref: J1.1.2, page 6152)
-    let ret = ::syscall::syscall(
+    let ret = crate::syscall::syscall(
         tf.x1to29[7] as usize,
         [
             tf.x0,
diff --git a/kernel/src/arch/aarch64/interrupt/mod.rs b/kernel/src/arch/aarch64/interrupt/mod.rs
index 140e9b8..606654a 100644
--- a/kernel/src/arch/aarch64/interrupt/mod.rs
+++ b/kernel/src/arch/aarch64/interrupt/mod.rs
@@ -4,7 +4,7 @@ mod handler;
 mod context;
 mod syndrome;
 
-use super::cortex_a::regs::*;
+use cortex_a::regs::*;
 pub use self::context::*;
 pub use self::handler::*;
 
diff --git a/kernel/src/arch/aarch64/memory.rs b/kernel/src/arch/aarch64/memory.rs
index bf55354..edc1d5b 100644
--- a/kernel/src/arch/aarch64/memory.rs
+++ b/kernel/src/arch/aarch64/memory.rs
@@ -1,8 +1,9 @@
 //! Memory initialization for aarch64.
 
 use ucore_memory::PAGE_SIZE;
-use super::atags::atags::Atags;
-use super::super::HEAP_ALLOCATOR;
+use atags::atags::Atags;
+use crate::HEAP_ALLOCATOR;
+use log::*;
 
 /// Memory initialization.
 pub fn init() {
diff --git a/kernel/src/arch/aarch64/mod.rs b/kernel/src/arch/aarch64/mod.rs
index 58aa784..de86725 100644
--- a/kernel/src/arch/aarch64/mod.rs
+++ b/kernel/src/arch/aarch64/mod.rs
@@ -1,13 +1,11 @@
 //! Entrance and initialization for aarch64.
 
-extern crate atags;
-extern crate cortex_a;
-
 pub mod io;
 pub mod paging;
 pub mod memory;
 pub mod interrupt;
 pub mod consts;
+pub mod cpu;
 
 #[cfg(feature = "board_raspi3")]
 #[path = "board/raspi3/mod.rs"]
@@ -15,16 +13,87 @@ pub mod board;
 
 pub use self::board::timer;
 
+global_asm!(include_str!("boot/boot.S"));
+
 /// The entry point of kernel
 #[no_mangle] // don't mangle the name of this function
 pub extern "C" fn rust_main() -> ! {
     // Init board to enable serial port.
     board::init();
-    ::logging::init(); // FIXME
+    crate::logging::init(); // FIXME
     interrupt::init();
     memory::init();
     timer::init();
-    ::kmain();
+
+    use crate::process::{processor, ContextImpl};
+    crate::process::init();
+    processor().manager().add(ContextImpl::new_kernel(kernel_proc2, 2333), 0);
+    processor().manager().add(ContextImpl::new_user_test(kernel_proc3), 0);
+
+    crate::kmain();
 }
 
-global_asm!(include_str!("boot/boot.S"));
+extern fn kernel_proc2(arg: usize) -> ! {
+    use alloc::format;
+    test_shell(&format!("proc2-{}>> ", arg));
+}
+
+extern fn kernel_proc3(arg: usize) -> ! {
+    use alloc::format;
+    test_shell(&format!("proc3-{}$ ", arg));
+}
+
+const LOGO: &str = r#"
+    ____                __   ____  _____
+   / __ \ __  __ _____ / /_ / __ \/ ___/
+  / /_/ // / / // ___// __// / / /\__ \
+ / _, _// /_/ /(__  )/ /_ / /_/ /___/ /
+/_/ |_| \__,_//____/ \__/ \____//____/
+"#;
+
+pub fn show_logo() {
+    println!("{}", LOGO);
+}
+
+#[inline(always)]
+fn sys_call(id: usize, arg0: usize, arg1: usize, arg2: usize, arg3: usize, arg4: usize, arg5: usize) -> i32 {
+    let ret: i32;
+    unsafe {
+        asm!("svc 0"
+        : "={x0}" (ret)
+        : "{x8}" (id), "{x0}" (arg0), "{x1}" (arg1), "{x2}" (arg2), "{x3}" (arg3), "{x4}" (arg4), "{x5}" (arg5)
+        : "memory"
+        : "volatile");
+    }
+    ret
+}
+
+pub fn test_shell(prefix: &str) -> ! {
+    show_logo();
+    loop {
+        print!("{}", prefix);
+        loop {
+            let c = io::getchar();
+            match c {
+                '\u{7f}' => {
+                    print!("\u{7f}");
+                }
+                'c' => unsafe {
+                    print!("sys_putc: ");
+                    sys_call(30, 'A' as usize, 0, 0, 0, 0, 0);
+                },
+                't' => unsafe {
+                    println!("sys_get_time: {}", sys_call(17, 0, 0, 0, 0, 0, 0));
+                },
+                ' '...'\u{7e}' => {
+                    print!("{}", c);
+                }
+                '\n' | '\r' => {
+                    print!("\n");
+                    break;
+                }
+                _ => {}
+            }
+        }
+    }
+}
diff --git a/kernel/src/arch/aarch64/paging.rs b/kernel/src/arch/aarch64/paging.rs
index e9cc43e..53b9045 100644
--- a/kernel/src/arch/aarch64/paging.rs
+++ b/kernel/src/arch/aarch64/paging.rs
@@ -7,7 +7,7 @@ type VirtAddr = usize;
 type PhysAddr = usize;
 
 use alloc::alloc::{alloc, Layout};
-use memory::{active_table, alloc_frame, alloc_stack, dealloc_frame};
+use crate::memory::{active_table, alloc_frame, dealloc_frame};
 
 /// TODO
 pub struct ActivePageTable {
@@ -19,6 +19,10 @@ impl ActivePageTable {
     pub unsafe fn new() -> Self {
         unimplemented!()
     }
+
+    pub fn token() -> usize {
+        unimplemented!()
+    }
 }
 
 impl PageTable for ActivePageTable {
@@ -31,7 +35,7 @@ impl PageTable for ActivePageTable {
         unimplemented!()
     }
 
-    fn get_entry(&mut self, addr: VirtAddr) -> &mut Self::Entry {
+    fn get_entry(&mut self, addr: VirtAddr) -> Option<&mut Self::Entry> {
         unimplemented!()
     }
 
@@ -200,7 +204,7 @@ impl InactivePageTable for InactivePageTable0 {
         unimplemented!()
     }
 
-    unsafe fn with(&self, f: impl FnOnce()) {
+    unsafe fn with<T>(&self, f: impl FnOnce() -> T) -> T {
         unimplemented!()
     }
 
@@ -215,8 +219,4 @@ impl InactivePageTable for InactivePageTable0 {
     fn dealloc_frame(target: PhysAddr) {
         dealloc_frame(target)
     }
-
-    fn alloc_stack() -> Stack {
-        alloc_stack()
-    }
 }
diff --git a/kernel/src/fs.rs b/kernel/src/fs.rs
index fb3a6a8..9fea7d7 100644
--- a/kernel/src/fs.rs
+++ b/kernel/src/fs.rs
@@ -34,6 +34,8 @@ lazy_static! {
         };
         #[cfg(target_arch = "x86_64")]
         let device = Box::new(ide::IDE::new(1));
+        #[cfg(target_arch = "aarch64")]
+        let device = unimplemented!();
 
         let sfs = SimpleFileSystem::open(device).expect("failed to open SFS");
         sfs.root_inode()
diff --git a/kernel/src/process/context.rs b/kernel/src/process/context.rs
index c377f63..14b78b7 100644
--- a/kernel/src/process/context.rs
+++ b/kernel/src/process/context.rs
@@ -51,13 +51,18 @@ impl ContextImpl {
         })
     }
 
-    pub fn new_user_test(entry: extern fn(usize) -> !) -> Self {
-        let ms = MemorySet::new();
-        let user_stack = ::memory::alloc_stack();
-        Context {
-            arch: unsafe { ArchContext::new_user_thread(entry as usize, user_stack.top - 8, ms.kstack_top(), false, ms.token()) },
-            memory_set: ms,
-        }
+    /// Temp for aarch64
+    pub fn new_user_test(entry: extern fn(usize) -> !) -> Box<Context> {
+        let memory_set = MemorySet::new();
+        let kstack = KernelStack::new();
+        let ustack = KernelStack::new();
+        Box::new(ContextImpl {
+            arch: unsafe { ArchContext::new_user_thread(entry as usize, ustack.top(), kstack.top(), false, memory_set.token()) },
+            memory_set,
+            kstack,
+            files: BTreeMap::default(),
+            cwd: String::new(),
+        })
     }
 
     /// Make a new user thread from ELF data
diff --git a/kernel/src/process/mod.rs b/kernel/src/process/mod.rs
index 1d2147d..cb9c41e 100644
--- a/kernel/src/process/mod.rs
+++ b/kernel/src/process/mod.rs
@@ -9,6 +9,7 @@ use core::sync::atomic::*;
 use log::*;
 
 pub mod context;
+
 pub fn init() {
     // NOTE: max_time_slice <= 5 to ensure 'priority' test pass
     let scheduler = Box::new(scheduler::RRScheduler::new(5));
@@ -26,6 +27,7 @@ pub fn init() {
     for i in 0..4 {
         manager.add(ContextImpl::new_kernel(idle, i), 0);
     }
+    #[cfg(not(target_arch = "aarch64"))]
     crate::shell::run_user_shell();
 
     info!("process init end");