diff --git a/.gitignore b/.gitignore
index eb5a316..485dee6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-target
+.idea
diff --git a/src/arch/x86_64/interrupt/exception.rs b/src/arch/x86_64/interrupt/exception.rs
index 142e2b5..cf35828 100644
--- a/src/arch/x86_64/interrupt/exception.rs
+++ b/src/arch/x86_64/interrupt/exception.rs
@@ -41,7 +41,7 @@ interrupt_stack!(debug, @paranoid, |stack| {
     }
 });
 
-interrupt_stack!(non_maskable, @paranoid, |stack| {
+nmi_handler!(non_maskable, |stack| {
     println!("Non-maskable interrupt");
     stack.dump();
 });
diff --git a/src/arch/x86_64/interrupt/handler.rs b/src/arch/x86_64/interrupt/handler.rs
index ddbef82..9604770 100644
--- a/src/arch/x86_64/interrupt/handler.rs
+++ b/src/arch/x86_64/interrupt/handler.rs
@@ -406,12 +406,21 @@ macro_rules! interrupt_stack {
                     $code
                 }
             }
+            fn function_name(){
+                println!("hello");
+            }
+            fn function_name2(){
+                println!("hello 2");
+            }
             core::arch::asm!(concat!(
                 // Backup all userspace registers to stack
                 $save1!(),
                 "push rax\n",
                 push_scratch!(),
                 push_preserved!(),
+                "
+                //call {p}
+                ",
 
                 $save2!(),
 
@@ -434,9 +443,15 @@ macro_rules! interrupt_stack {
                 pop_scratch!(),
 
                 $rstor1!(),
+                 "
+                 // call {p2}
+                ",
                 "iretq\n",
             ),
 
+            p = sym function_name,
+            p2 = sym function_name2,
+
             inner = sym inner,
             IA32_GS_BASE = const(x86::msr::IA32_GS_BASE),
             KERNEL_PERCPU_SHIFT = const(crate::KERNEL_PERCPU_SHIFT),
@@ -452,6 +467,138 @@ macro_rules! interrupt_stack {
     ($name:ident, |$stack:ident| $code:block) => { interrupt_stack!($name, swapgs_iff_ring3_fast!, nop!, nop!, swapgs_iff_ring3_fast!, is_paranoid: false, |$stack| $code); };
     ($name:ident, @paranoid, |$stack:ident| $code:block) => { interrupt_stack!($name, nop!, save_and_set_gsbase_paranoid!, restore_gsbase_paranoid!, nop!, is_paranoid: true, |$stack| $code); }
 }
+#[macro_export]
+macro_rules! nmi_handler {
+        ($name:ident,  |$stack:ident| $code:block) => {
+
+        #[naked]
+        #[allow(named_asm_labels)]
+        pub unsafe extern "C" fn $ name() {
+            unsafe extern "C" fn inner( $ stack: &mut $ crate::arch::x86_64::interrupt::InterruptStack) {
+                # [allow(unused_unsafe)]
+                unsafe {
+                    $ code
+                }
+            }
+
+             core::arch::asm!(concat!(
+                "
+                push rdx
+                // replace test come from kernel
+                cmp QWORD PTR [rsp + 8*2], {GDT_KERNEL_CODE}
+                jne first_nmi
+                ",
+                // not from user space
+                "
+                cmp QWORD PTR [rsp -8], $1
+                je nested_nmi
+                ",
+                // if nmi stack
+                "
+                lea rdx, [rsp + 6*8]
+                cmp 4*8[rsp], rdx
+                ja first_nmi
+                ",
+                // nested nmi
+                "
+                nested_nmi:
+                /// ! repalce with address of repeat nmi and end repeat nmi
+                mov rdx, 0x080a3352
+                cmp	rdx, 8[rsp]
+                ja	1f
+                mov	rdx, 0x080a3377
+                cmp	rdx, 8[rsp]
+                ja	nested_nmi_out
+                ",
+                // prepare
+                "
+                1:
+                lea	    rdx, -1*8[rsp]
+                mov 	rsp, rdx
+                lea  	rdx, -10*8[rsp]
+                push    {GDT_KERNEL_DATA}
+                push	rdx
+                pushf
+                push	{GDT_KERNEL_CODE}
+                //replace address repeat nmi
+                push	0x080a3352
+                ",
+                // nested nmi out
+                "
+                nested_nmi_out:
+                pop rdx
+                iretq
+                ",
+
+
+                // first nmi
+                "
+                first_nmi:
+                mov    rdx, [rsp]
+                push    $1
+                ",
+                // first copy
+                "
+                sub    rsp, $(5*8)
+
+                .rept 5
+                push    11*8[rsp]
+                .endr
+                ",
+                //second copy
+                "
+                repeat_nmi:
+                mov QWORD PTR 10*8[rsp], $1
+
+                add    rsp, $(10*8)
+
+                .rept 5
+                push    -6*8[rsp]
+                .endr
+                sub     rsp, $(5*8)
+                ",
+                //normal continuation
+                "
+                end_repeat_nmi:
+                ",
+                swapgs_iff_ring3_fast!(),
+                "
+                push rax
+                ",
+                push_scratch!(),
+                push_preserved!(),
+                // save_and_set_gsbase_paranoid!(),
+                "
+                mov rdi,rsp
+                call {inner}
+                ",
+                // restore_gbase_paranoid!(),
+                pop_preserved!(),
+                pop_scratch!(),
+                swapgs_iff_ring3_fast!(),
+                "
+                7:
+                add	    rsp,$6*8
+
+                mov QWORD PTR 5*8[rsp], $0
+
+                iretq
+                ",
+
+            ),
+
+            inner = sym inner,
+            GDT_KERNEL_CODE = const(crate::gdt::GDT_KERNEL_CODE),
+            GDT_KERNEL_DATA = const(crate::gdt::GDT_KERNEL_DATA),
+
+            options(noreturn),
+
+            );
+
+        }
+    }
+}
+
 
 #[macro_export]
 macro_rules! interrupt {
diff --git a/src/syscall/mod.rs b/src/syscall/mod.rs
index 5f18288..3f4df68 100644
--- a/src/syscall/mod.rs
+++ b/src/syscall/mod.rs
@@ -33,7 +33,7 @@ use self::flag::{MapFlags, PhysmapFlags, WaitFlags};
 use self::number::*;
 
 use crate::context::ContextId;
-use crate::interrupt::exception::{divide_by_zero, non_maskable};
+use crate::interrupt::exception::divide_by_zero;
 use crate::interrupt::InterruptStack;
 use crate::scheme::{FileHandle, SchemeNamespace, memory::MemoryScheme};
 
@@ -63,9 +63,9 @@ pub mod validate;
 
 fn nmi_t() -> Result<usize>{
     println!("Yo");
-    unsafe {
-        //non_maskable();
-    }
+    // unsafe {
+    //     divide_by_zero();
+    // }
     Ok(0)
 }