diff --git a/.gitmodules b/.gitmodules
index b970cd8..3712af8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "rustlib"]
 	path = rustlib
-	url = http://git.suthby.org:2024/metaverse/kernel-release.git
+	url = http://git.suthby.org:2024/metaverse/rustenv
diff --git a/Cargo.toml b/Cargo.toml
index cef59e4..d2d3873 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,3 +2,9 @@
 name = "metaverse"
 version = "0.1.0"
 edition = "2021"
+
+# 此Cargo.toml仅用于rust-analyzer识别rust部分的代码
+# 不应使用cargo编译
+
+[target.'cfg(target_arch = "x86_64")']
+target = "x86_64-unknown-none"
diff --git a/README.md b/README.md
index 42c9a2b..4600d15 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ make debug
   * [x] 内存分配器
     * [x] raw_allocator
 * [x] tty
-* [ ] 内核日志
+* [x] 内核日志
 * [ ] 文件系统
   * [ ] vfs
   * [ ] fat32驱动（移植）
diff --git a/include/kernel/clock/time.h b/include/kernel/clock/time.h
new file mode 100644
index 0000000..b6cb4de
--- /dev/null
+++ b/include/kernel/clock/time.h
@@ -0,0 +1,15 @@
+#ifndef TIME_H
+#define TIME_H
+
+#include <types.h>
+
+// 使用UNIX时间戳
+usize system_time_get();
+
+// 如果硬件支持更高的计时精度，
+// 此函数提供从系统unix时间开始到现在的纳秒为单位的时间
+usize system_time_ns_get();
+
+void system_time_increase();
+
+#endif
diff --git a/include/kernel/memm.h b/include/kernel/memm.h
index 27557a7..f4714ae 100644
--- a/include/kernel/memm.h
+++ b/include/kernel/memm.h
@@ -139,9 +139,13 @@ allocator对象在进程与内核之间传递时一律使用内核空间的映
  */
 void *memm_allocate(usize size, usize pid);
 #define memm_addr_set_allocator(mem, allocator) \
-    *(allocator_t **)(mem - 16) = allocator;
+    *(allocator_t **)((void *)(mem) - 16) = allocator;
 #define memm_addr_get_allocator(mem) \
-    ((*(allocator_t **)(mem - 16)))
+    ((*(allocator_t **)((void *)(mem) - 16)))
+
+void *memm_kernel_allocate(usize size);
+
+void *memm_user_allocate(usize size, usize pid);
 
 /*
 释放内存
diff --git a/include/kernel/tty.h b/include/kernel/tty.h
index 6079eeb..2a1e6c3 100644
--- a/include/kernel/tty.h
+++ b/include/kernel/tty.h
@@ -6,13 +6,13 @@
 
 typedef enum __tty_type
 {
-    invalid = 0,
+    tty_type_invalid = 0,
     // 用于在内核刚刚被引导，只有bootloader提供的显示功能时使用
     tty_type_raw_framebuffer = 1,
     // 用于图形功能初始化后，直接连接图形接口
     tty_type_display = 2,
     // 用于图形终端的终端模拟器
-    tty_type_vtty = 3,
+    tty_type_vterm = 3,
 } tty_type;
 
 typedef enum __framebuffer_pixel_type
@@ -40,8 +40,9 @@ typedef struct __framebuffer framebuffer;
 // 文本模式中的字符由tty模块渲染
 typedef enum __tty_mode
 {
-    tty_mode_text = 0,
-    tty_mode_graphics = 1,
+    tty_mode_invalid = 0,
+    tty_mode_text = 1,
+    tty_mode_graphics = 2,
 } tty_mode;
 
 typedef struct __tty_text_state
@@ -55,9 +56,11 @@ typedef struct __tty_text_state
 typedef struct __tty
 {
     usize id;
+    usize width, height;
     tty_type type;
     tty_typeinfo typeinfo;
     tty_mode mode;
+    bool enabled;
     tty_text_state text;
 } tty;
 
@@ -67,6 +70,7 @@ typedef struct __tty_controller_t
 #define TTY_MAX_NUM 128
     tty *ttys[TTY_MAX_NUM];
     bool map[TTY_MAX_NUM];
+    tty *enabled[TTY_MAX_NUM];
 } tty_controller_t;
 
 /**
@@ -118,6 +122,26 @@ void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor);
 
 #define gen_color(r, g, b) (((r) << 16) | ((g) << 8) | (b))
 
+usize tty_get_width(tty *ttyx);
+usize tty_get_height(tty *ttyx);
+
+tty_type tty_get_type(tty *ttyx);
+tty_mode tty_get_mode(tty *ttyx);
+
+bool tty_is_enabled(tty *ttyx);
+
+/**
+ * @brief 打开某个tty
+ * 
+ * @param ttyx 
+ * @return true 打开成功
+ * @return false 已经打开
+ *  或作为raw_framebuffer类型的tty，framebuffer已被其它raw_framebuffer
+ *  类型的tty占用
+ */
+bool tty_enable(tty *ttyx);
+void tty_disable(tty *ttyx);
+
 #define TTY_FONT_SCALE 2
 
 typedef struct __tty_font_t
diff --git a/rustlib b/rustlib
index f8d0d53..087c479 160000
--- a/rustlib
+++ b/rustlib
@@ -1 +1 @@
-Subproject commit f8d0d53a23b5a91848d8f6491122b69f79994537
+Subproject commit 087c4795bbc23cd0baee060bda8c1159a971a542
diff --git a/src/Makefile b/src/Makefile
index cbfd441..7ccfc6c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -22,28 +22,29 @@ endif
 ################################
 # rust语言环境变量
 
-RSCFLAGS = --emit obj --crate-type lib \
+RSCFLAGS = --emit obj --crate-type staticlib --verbose \
+	--crate-name=metaverse \
+	--edition 2021 \
 	-L crate="${PWD}/../rustlib/${ARCH}/src/" \
 	-C code-model=large \
 	-C relocation-model=static \
-	-C embed-bitcode=no \
-	-C opt-level=z
+	-C embed-bitcode=no
 
 ifeq (${ARCH},x86_64)
-	RSCFLAGS := ${RSCFLAGS} -C target-feature=-sse,-avx
+	RSCFLAGS := ${RSCFLAGS} --target x86_64-unknown-none
+endif
+
+ifdef release
+	RSCFLAGS := -O
+endif
+
+ifeq (${ARCH},x86_64)
+	RSCFLAGS := ${RSCFLAGS} -C target-feature=-sse
 endif
 
 RUSTLIB_PATH = ../rustlib/${ARCH}/lib
-RUST_LIBS = "${RUSTLIB_PATH}/libaddr2line.rlib" "${RUSTLIB_PATH}/libadler.rlib" \
-	"${RUSTLIB_PATH}/liballoc.rlib" "${RUSTLIB_PATH}/libcfg_if.rlib" "${RUSTLIB_PATH}/libcompiler_builtins.rlib" \
-	"${RUSTLIB_PATH}/libcore.rlib" "${RUSTLIB_PATH}/libgetopts.rlib" "${RUSTLIB_PATH}/libgimli.rlib" \
-	"${RUSTLIB_PATH}/libhashbrown.rlib" "${RUSTLIB_PATH}/libmemchr.rlib" "${RUSTLIB_PATH}/libminiz_oxide.rlib" \
-	"${RUSTLIB_PATH}/libobject.rlib" "${RUSTLIB_PATH}/libpanic_abort.rlib" "${RUSTLIB_PATH}/libpanic_unwind.rlib" \
-	"${RUSTLIB_PATH}/libproc_macro.rlib" "${RUSTLIB_PATH}/libprofiler_builtins.rlib" \
-	"${RUSTLIB_PATH}/librustc_demangle.rlib" "${RUSTLIB_PATH}/librustc_std_workspace_alloc.rlib" \
-	"${RUSTLIB_PATH}/librustc_std_workspace_core.rlib" "${RUSTLIB_PATH}/librustc_std_workspace_std.rlib" \
-	"${RUSTLIB_PATH}/libstd_detect.rlib" "${RUSTLIB_PATH}/libstd.rlib" "${RUSTLIB_PATH}/libsysroot.rlib" \
-	"${RUSTLIB_PATH}/libtest.rlib" "${RUSTLIB_PATH}/libunicode_width.rlib" "${RUSTLIB_PATH}/libunwind.rlib"
+RUST_LIBS = "${RUSTLIB_PATH}/liballoc.rlib" "${RUSTLIB_PATH}/libcompiler_builtins.rlib" \
+	"${RUSTLIB_PATH}/libcore.rlib" "${RUSTLIB_PATH}/librustc_std_workspace_core.rlib"
 
 ################################
 
diff --git a/src/kernel/Makefile b/src/kernel/Makefile
index 8a1f78a..093fa03 100644
--- a/src/kernel/Makefile
+++ b/src/kernel/Makefile
@@ -11,7 +11,7 @@ ifdef release
 	CCFLAGS := ${CCFLAGS} -O2
 endif
 
-C_SRCS = main.c tty.c font.c memm.c memm_${ARCH}.c raw.c
+C_SRCS = main.c tty.c font.c memm.c memm_${ARCH}.c raw.c time.c
 C_OBJS = ${C_SRCS:.c=.c.o}
 
 ################################
@@ -38,7 +38,7 @@ STRIP_SECS = -R .note.GNU-stack
 OBJCOPY_FLAGS = ${STRIP_SECS}
 
 # 子目录
-VPATH = memm/ memm/allocator tty/ klog/ arch/${ARCH}
+VPATH = memm/ memm/allocator tty/ klog/ arch/${ARCH} clock/
 
 %.c.o: %.c
 	@echo -e "\e[1m\e[33m${CC}\e[0m \e[32m$<\e[0m \e[34m-->\e[0m \e[1m\e[32m$@\e[0m"
diff --git a/src/kernel/arch/x86_64/entry.s b/src/kernel/arch/x86_64/entry.s
index c259f4a..04f86fd 100644
--- a/src/kernel/arch/x86_64/entry.s
+++ b/src/kernel/arch/x86_64/entry.s
@@ -39,10 +39,6 @@ multiboot2_header:
         dd 8
 multiboot2_header_end:
 
-    section .kstack
-kstack:
-    resb 0x1000000 - 0x400000
-
     section .kend
     global kend
 kend:
diff --git a/src/kernel/clock/mod.rs b/src/kernel/clock/mod.rs
new file mode 100644
index 0000000..077885d
--- /dev/null
+++ b/src/kernel/clock/mod.rs
@@ -0,0 +1 @@
+pub mod time;
diff --git a/src/kernel/clock/time.c b/src/kernel/clock/time.c
new file mode 100644
index 0000000..c9af49b
--- /dev/null
+++ b/src/kernel/clock/time.c
@@ -0,0 +1,20 @@
+#include <kernel/clock/time.h>
+#include <types.h>
+
+usize system_time;
+usize system_time_ns;
+
+usize system_time_get()
+{
+    return system_time;
+}
+
+usize system_time_ns_get()
+{
+    return system_time_ns;
+}
+
+void system_time_increase()
+{
+    system_time++;
+}
diff --git a/src/kernel/clock/time.rs b/src/kernel/clock/time.rs
new file mode 100644
index 0000000..d286202
--- /dev/null
+++ b/src/kernel/clock/time.rs
@@ -0,0 +1,166 @@
+use core::{cmp::Ordering, ops::Sub, time::Duration};
+
+use alloc::{format, string::ToString};
+
+extern "C" {
+    fn system_time_get() -> usize;
+    fn system_time_ns_get() -> usize;
+}
+
+#[derive(Debug)]
+pub struct SystemTimeError(Duration);
+
+#[derive(Clone, Copy, Hash)]
+pub struct SystemTime {
+    unix_time: usize,
+    ns_time: usize,
+}
+
+impl ToString for SystemTime {
+    fn to_string(&self) -> alloc::string::String {
+        let second_dur = 1000usize;
+        let minute_dur = second_dur * 60;
+        let hour_dur = minute_dur * 60;
+        let day_dur = hour_dur * 24;
+        let year_dur = day_dur * 365;
+        let four_year_dur = day_dur * (365 * 4 + 1);
+
+        let year = 1970
+            + self.unix_time / four_year_dur * 4
+            + if self.unix_time % four_year_dur < day_dur * 59 {
+                0
+            } else {
+                (self.unix_time % four_year_dur - day_dur) / year_dur
+            };
+        let rest = self.unix_time % four_year_dur;
+        let mut leap = false;
+        let rest = if rest < day_dur * 59 {
+            rest
+        } else {
+            if rest < 60 {
+                leap = true;
+            }
+            rest - day_dur
+        };
+        let month = rest % year_dur;
+        let mut day = 0;
+        let month = if month < 31 * day_dur {
+            day = month;
+            1
+        } else if month < (31 + 28) * day_dur {
+            day = month - 31 * day_dur;
+            2
+        } else if month < (31 + 28 + 31) * day_dur {
+            day = month - (31 + 28) * day_dur;
+            3
+        } else if month < (31 + 28 + 31 + 30) * day_dur {
+            day = month - (31 + 28 + 31) * day_dur;
+            4
+        } else if month < (31 + 28 + 31 + 30 + 31) * day_dur {
+            day = month - (31 + 28 + 31 + 30) * day_dur;
+            5
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31) * day_dur;
+            6
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30) * day_dur;
+            7
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30 + 31) * day_dur;
+            8
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31) * day_dur;
+            9
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30) * day_dur;
+            10
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31) * day_dur;
+            11
+        } else if month < (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31) * day_dur {
+            day = month - (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30) * day_dur;
+            12
+        } else {
+            0
+        };
+        let mut hour = day % day_dur;
+        day /= day_dur;
+        day += 1;
+        if leap {
+            day += 1;
+        }
+        let mut minute = hour % hour_dur;
+        hour /= hour_dur;
+        let mut second = minute % minute_dur;
+        minute /= minute_dur;
+        let milisec = second % second_dur;
+        second /= second_dur;
+        format!(
+            "[ {}-{}-{} {}:{}:{}.{} ] ",
+            year, month, day, hour, minute, second, milisec
+        )
+    }
+}
+
+impl Eq for SystemTime {}
+impl PartialEq for SystemTime {
+    fn eq(&self, other: &Self) -> bool {
+        self.unix_time == other.unix_time && self.ns_time == other.ns_time
+    }
+}
+
+impl Ord for SystemTime {
+    fn cmp(&self, other: &Self) -> Ordering {
+        match self.unix_time.cmp(&other.unix_time) {
+            Ordering::Equal => self.ns_time.cmp(&other.ns_time),
+            ord => ord,
+        }
+    }
+}
+
+impl PartialOrd for SystemTime {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        match self.unix_time.partial_cmp(&other.unix_time) {
+            Some(Ordering::Equal) => self.ns_time.partial_cmp(&other.ns_time),
+            ord => ord,
+        }
+    }
+}
+
+impl Sub<SystemTime> for SystemTime {
+    type Output = Result<Duration, SystemTimeError>;
+
+    fn sub(self, rhs: SystemTime) -> Self::Output {
+        if self < rhs {
+            let earl = (rhs - self).unwrap();
+            Err(SystemTimeError(earl))
+        } else {
+            let usdiff = self.ns_time as isize - self.ns_time as isize;
+            let usdiff = if usdiff >= 0 {
+                Duration::from_nanos(usdiff as usize as u64)
+            } else {
+                Duration::from_nanos(0) - Duration::from_nanos((-usdiff) as usize as u64)
+            };
+            Ok(Duration::from_millis((self.unix_time - rhs.unix_time) as u64) + usdiff)
+        }
+    }
+}
+
+impl SystemTime {
+    pub fn now() -> Self {
+        unsafe {
+            Self {
+                unix_time: system_time_get(),
+                ns_time: system_time_ns_get(),
+            }
+        }
+    }
+
+    pub fn duration_since(&self, earlier: &SystemTime) -> Result<Duration, SystemTimeError> {
+        *self - *earlier
+    }
+
+    pub fn elapsed(&self) -> Result<Duration, SystemTimeError> {
+        SystemTime::now() - *self
+    }
+}
diff --git a/src/kernel/klog.rs b/src/kernel/klog.rs
new file mode 100644
index 0000000..756d84d
--- /dev/null
+++ b/src/kernel/klog.rs
@@ -0,0 +1,196 @@
+use alloc::string::ToString;
+use alloc::vec;
+use alloc::vec::Vec;
+
+use super::{
+    clock::time::SystemTime,
+    tty::tty::{Color, Message, MessageBuilder},
+};
+
+#[derive(PartialEq)]
+pub enum LoggerLevel {
+    Fatal,
+    Error,
+    Warning,
+    Info,
+    Debug,
+    Trace,
+}
+
+pub struct KernelLogger {
+    fatal_queue: Vec<(SystemTime, Message)>,
+    error_queue: Vec<(SystemTime, Message)>,
+    warning_queue: Vec<(SystemTime, Message)>,
+    info_queue: Vec<(SystemTime, Message)>,
+    debug_queue: Vec<(SystemTime, Message)>,
+    trace_queue: Vec<(SystemTime, Message)>,
+}
+
+impl KernelLogger {
+    pub fn new() -> Self {
+        Self {
+            fatal_queue: vec![],
+            error_queue: vec![],
+            warning_queue: vec![],
+            info_queue: vec![],
+            debug_queue: vec![],
+            trace_queue: vec![],
+        }
+    }
+
+    pub fn fatal(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Fatal: ")
+            .foreground_color(Color::RED)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.fatal_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn error(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Error: ")
+            .foreground_color(Color::ORANGE)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.error_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn warning(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Warning: ")
+            .foreground_color(Color::PURPLE)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.warning_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn info(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Info: ")
+            .foreground_color(Color::GREEN)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.info_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn debug(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Debug: ")
+            .foreground_color(Color::WHITE)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.debug_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn trace(&mut self, msg: Message) {
+        let msg = MessageBuilder::new()
+            .message("Trace: ")
+            .foreground_color(Color::WHITE)
+            .append(MessageBuilder::from_message(msg))
+            .build();
+        self.trace_queue.push((SystemTime::now(), msg));
+    }
+
+    pub fn iter(&self, level: LoggerLevel) -> LogIterator {
+        let mut logs = vec![];
+        match level {
+            LoggerLevel::Fatal => {
+                logs.push(&self.fatal_queue);
+            }
+            LoggerLevel::Error => {
+                logs.push(&self.fatal_queue);
+                logs.push(&self.error_queue);
+            }
+            LoggerLevel::Warning => {
+                logs.push(&self.fatal_queue);
+                logs.push(&self.error_queue);
+                logs.push(&self.warning_queue);
+            }
+            LoggerLevel::Info => {
+                logs.push(&self.fatal_queue);
+                logs.push(&self.error_queue);
+                logs.push(&self.warning_queue);
+                logs.push(&self.info_queue);
+            }
+            LoggerLevel::Debug => {
+                logs.push(&self.fatal_queue);
+                logs.push(&self.error_queue);
+                logs.push(&self.warning_queue);
+                logs.push(&self.info_queue);
+                logs.push(&self.debug_queue);
+            }
+            LoggerLevel::Trace => {
+                logs.push(&self.fatal_queue);
+                logs.push(&self.error_queue);
+                logs.push(&self.warning_queue);
+                logs.push(&self.info_queue);
+                logs.push(&self.debug_queue);
+                logs.push(&self.trace_queue);
+            }
+        }
+        let mut res = vec![];
+        let mut indeces = Vec::new();
+        for _ in 0..logs.len() {
+            indeces.push(0usize);
+        }
+        let all_end = |indeces: &Vec<usize>, logs: &Vec<&Vec<(SystemTime, Message)>>| {
+            for i in 0..indeces.len() {
+                if indeces[i] < logs.len() {
+                    return false;
+                }
+            }
+            return true;
+        };
+        while !all_end(&indeces, &logs) {
+            let mut min_ind = None;
+            let mut min = None;
+            for i in 0..indeces.len() {
+                if indeces[i] >= logs[i].len() {
+                    continue;
+                }
+                if let Some(minx) = min.as_mut() {
+                    if logs[i][indeces[i]].0 < *minx {
+                        *minx = logs[i][indeces[i]].0;
+                        min_ind = Some(i);
+                    }
+                } else {
+                    min = Some(logs[i][indeces[i]].0);
+                    min_ind = Some(i);
+                }
+            }
+            if let Some(mini) = min_ind {
+                res.push(&logs[mini][indeces[mini]]);
+                indeces[mini] += 1;
+            } else {
+                break;
+            }
+        }
+        LogIterator { logs: res }
+    }
+}
+
+pub struct LogIterator<'a> {
+    logs: Vec<&'a (SystemTime, Message)>,
+}
+
+impl<'a> Iterator for LogIterator<'a> {
+    type Item = Message;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let res = if let Some((time, msg)) = self.logs.first() {
+            Some(
+                MessageBuilder::new()
+                    .message(&time.to_string())
+                    .append(MessageBuilder::from_message(msg.clone()))
+                    .build(),
+            )
+        } else {
+            None
+        };
+        if let Some(_) = res {
+            self.logs.remove(0);
+        }
+        res
+    }
+}
diff --git a/src/kernel/main.rs b/src/kernel/main.rs
index 099a7ee..d50d8b1 100644
--- a/src/kernel/main.rs
+++ b/src/kernel/main.rs
@@ -1,18 +1,23 @@
-use std::panic;
+use crate::message;
 
-use crate::kernel::tty::tty::{Color, MessageBuilder, Tty};
+use super::{
+    klog::{KernelLogger, LoggerLevel},
+    tty::tty::{BuilderFunctions::*, Color, Tty},
+};
 
 #[no_mangle]
-extern "C" fn kmain_rust() {
+extern "C" fn kmain_rust() -> ! {
     let tty = Tty::from_id(0).unwrap();
-    // let ttyptr = unsafe { tty.get_c_tty_t() };
-
-    let hello = MessageBuilder::new()
-        .message("Hello, ".to_string())
-        .message("Metaverse".to_string())
-        .foreground_color(Color(0xa, 0xee, 0xa))
-        .message("!\n".to_string())
-        .build();
-    tty.print(hello);
+    tty.enable();
+    let mut logger = KernelLogger::new();
+    logger.info(message!(
+        Msg("Hello, "),
+        Msg("Metaverse"),
+        FgColor(Color::GREEN),
+        Msg("!\n")
+    ));
+    for msg in logger.iter(LoggerLevel::Info) {
+        tty.print(msg);
+    }
     loop {}
 }
diff --git a/src/kernel/memm/allocator/raw.c b/src/kernel/memm/allocator/raw.c
index 79ed4e8..ce158de 100644
--- a/src/kernel/memm/allocator/raw.c
+++ b/src/kernel/memm/allocator/raw.c
@@ -17,17 +17,19 @@ void *raw_allocator_allocate(raw_allocator_t *allocator, usize size, usize align
 {
     usize real_size = size;
     align_to(real_size, 16);
-    raw_allocator_cell *cell = allocator->cells;
-    while ((void *)raw_allocator_next_cell(cell) < (void *)allocator + allocator->size)
+    raw_allocator_cell *cell = &allocator->cells;
+    while ((void *)cell < raw_allocator_end(allocator))
     {
         while ( // 确保cell指向的内容还在这个allocator内
-            (void *)raw_allocator_next_cell(cell) < raw_allocator_end(allocator) &&
+            (void *)cell < raw_allocator_end(allocator) &&
             cell->length != 0)
         {
             cell = raw_allocator_next_cell(cell);
         }
         if (real_size <= cell->capacity)
             break;
+        else
+            cell = raw_allocator_next_cell(cell);
     }
     if ((void *)cell < raw_allocator_end(allocator))
         goto fitable_cell_finded;
diff --git a/src/kernel/memm/memm.c b/src/kernel/memm/memm.c
index aecfe24..787befa 100644
--- a/src/kernel/memm/memm.c
+++ b/src/kernel/memm/memm.c
@@ -192,7 +192,7 @@ void *memm_allocate(usize size, usize pid)
                            MEMM_RAW_ALLOCATOR, pid);
     allocator = new_allocator;
 
-    allocator_iterator_t *allind = memm_allocate(sizeof(allocator_iterator_t), 0);
+    allocator_iterator_t *allind = memm_kernel_allocate(sizeof(allocator_iterator_t));
     allind->allocator = new_allocator;
     allind->left = nullptr;
     allind->right = nullptr;
@@ -200,15 +200,23 @@ void *memm_allocate(usize size, usize pid)
     ptr = new_allocator->allocate(&new_allocator->allocator_instance, orgsize, 0);
 
 after_allocation:
-    memm_addr_set_allocator(ptr, allocator);
-    if (pid != 0)
-    { // TODO 进程管理中应该有一个用户地址-内核地址映射表
-      // 在进程分配时将页映射到用户空间中，并将这个映射关系记录进这个表中
-      // 需要返回的是用户空间的地址
-    }
+    if (ptr != nullptr)
+        memm_addr_set_allocator(ptr, allocator);
     return ptr;
 }
 
+void *memm_kernel_allocate(usize size)
+{
+    return memm_allocate(size, 0);
+}
+
+void *memm_user_allocate(usize size, usize pid)
+{
+    void *res = memm_allocate(size, pid);
+    // TODO 将内存空间映射到用户空间
+    return res;
+}
+
 void memm_free(void *mem)
 {
     allocator_t *allocator = memm_addr_get_allocator(mem);
diff --git a/src/kernel/memm/memm.rs b/src/kernel/memm/memm.rs
index 471c332..fea17bf 100644
--- a/src/kernel/memm/memm.rs
+++ b/src/kernel/memm/memm.rs
@@ -1,9 +1,13 @@
 extern crate core;
 
-use core::alloc::{GlobalAlloc, Layout};
+use core::{
+    alloc::{GlobalAlloc, Layout},
+    ptr::null_mut,
+};
 
 extern "C" {
-    pub fn memm_allocate(size: usize, pid: usize) -> *mut u8;
+    pub fn memm_kernel_allocate(size: usize) -> *mut u8;
+    // pub fn memm_user_allocate(size: usize, pid: usize);
     pub fn memm_free(mem: *mut u8);
 }
 
@@ -11,7 +15,14 @@ pub struct KernelAllocator {}
 
 unsafe impl GlobalAlloc for KernelAllocator {
     unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-        memm_allocate(layout.size(), 0)
+        let res = memm_kernel_allocate(layout.size());
+        if res == null_mut() {
+            panic!(
+                "Kernel allocator failed to allocate {} byte(s) memory.",
+                layout.size()
+            );
+        }
+        res
     }
 
     unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
diff --git a/src/kernel/mod.rs b/src/kernel/mod.rs
index 14f7bad..583319c 100644
--- a/src/kernel/mod.rs
+++ b/src/kernel/mod.rs
@@ -1,3 +1,6 @@
+pub mod clock;
+pub mod klog;
+pub mod main;
 pub mod memm;
 pub mod tty;
-pub mod main;
+pub mod sync;
diff --git a/src/kernel/sync/mod.rs b/src/kernel/sync/mod.rs
new file mode 100644
index 0000000..2ba968f
--- /dev/null
+++ b/src/kernel/sync/mod.rs
@@ -0,0 +1 @@
+pub mod rwlock;
diff --git a/src/kernel/sync/rwlock.rs b/src/kernel/sync/rwlock.rs
new file mode 100644
index 0000000..76d2f36
--- /dev/null
+++ b/src/kernel/sync/rwlock.rs
@@ -0,0 +1,129 @@
+use core::{ops::{Deref, DerefMut}, ptr::null_mut};
+
+use alloc::{vec, vec::Vec};
+
+/// ## RwLock<T>
+/// 读写锁
+///
+/// * 对于写入操作：
+///
+/// 锁没有占用时，获取锁，并执行闭包。
+///
+/// 当锁已经被占用，将闭包悬挂。
+///
+/// 释放锁时，将所有悬挂的闭包都执行。
+///
+/// 正在释放锁时，`write`方法返回`Err(())`
+///
+/// ```
+/// let num = 6;
+/// let num = RwLock::new(num);
+/// if let Err(()) = num.write(
+///     |n| *n = 10
+/// ) {}
+/// let numstr = format!("{}", num.read());
+/// ````
+pub struct RwLock<'a, T> {
+    obj: T,
+    locked: bool,
+    dealing_hanged: bool,
+    ptr: *mut RwLockWriteGuard<'a, T>,
+    hanging: Vec<&'a dyn Fn(&mut T)>,
+}
+
+unsafe impl<T> Send for RwLock<'_, T> {}
+unsafe impl<T> Sync for RwLock<'_, T> {}
+
+impl<'a, T> RwLock<'a, T> {
+    pub fn new(obj: T) -> Self {
+        Self {
+            obj,
+            locked: false,
+            dealing_hanged: false,
+            ptr: null_mut(),
+            hanging: vec![],
+        }
+    }
+
+    pub fn read(&self) -> RwLockReadGuard<T> {
+        RwLockReadGuard { obj: &self.obj }
+    }
+
+    pub fn write(&'a mut self, f: &'a dyn Fn(&mut T)) -> Result<RwLockWriteGuard<T>, ()> {
+        if self.dealing_hanged {
+            Err(())
+        } else if !self.locked {
+            self.locked = true;
+            f(&mut self.obj);
+            let ptr = { self as *mut RwLock<'a, T> };
+            let obj = &mut self.obj;
+            let mut res = RwLockWriteGuard {
+                obj,
+                ptr,
+                must_deal_hang: false,
+            };
+            self.ptr = &mut res as *mut RwLockWriteGuard<'_, T>;
+            Ok(res)
+        } else {
+            self.hanging.push(f);
+            let ptr = { self as *mut RwLock<'a, T> };
+            let obj = &mut self.obj;
+            Ok(RwLockWriteGuard {
+                obj,
+                ptr,
+                must_deal_hang: false,
+            })
+        }
+    }
+}
+
+pub struct RwLockReadGuard<'a, T> {
+    obj: &'a T,
+}
+
+impl<'a, T> Deref for RwLockReadGuard<'a, T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        self.obj
+    }
+}
+
+impl<'a, T> Drop for RwLockReadGuard<'a, T> {
+    fn drop(&mut self) {}
+}
+
+pub struct RwLockWriteGuard<'a, T> {
+    obj: &'a mut T,
+    ptr: *mut RwLock<'a, T>,
+    must_deal_hang: bool,
+}
+
+impl<'a, T> Deref for RwLockWriteGuard<'a, T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        self.obj
+    }
+}
+
+impl<'a, T> DerefMut for RwLockWriteGuard<'a, T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.obj
+    }
+}
+
+impl<'a, T> Drop for RwLockWriteGuard<'a, T> {
+    fn drop(&mut self) {
+        if self.must_deal_hang {
+            let p = unsafe { &mut *self.ptr };
+            p.dealing_hanged = true;
+            for f in p.hanging.iter() {
+                f(self.obj);
+            }
+            p.hanging.clear();
+            p.dealing_hanged = false;
+            p.locked = false;
+        }
+    }
+}
diff --git a/src/kernel/tty/font.c b/src/kernel/tty/font.c
index 684fc32..57d78f5 100644
--- a/src/kernel/tty/font.c
+++ b/src/kernel/tty/font.c
@@ -405,7 +405,7 @@ u64 font[256][64] = {
         0b00000000,
         0b00011000, ///
         0b00101000,
-        0b01001000,
+        0b00001000,
         0b00001000,
         0b00001000,
         0b00001000,
diff --git a/src/kernel/tty/mod.rs b/src/kernel/tty/mod.rs
index cd8fd47..ed058fa 100644
--- a/src/kernel/tty/mod.rs
+++ b/src/kernel/tty/mod.rs
@@ -1 +1,46 @@
 pub mod tty;
+
+#[macro_export]
+macro_rules! message_msg {
+    () => {};
+    ( $builder : expr, $e : expr) => {
+        $builder.message_mut($e);
+    };
+}
+
+#[macro_export]
+macro_rules! message_fgc {
+    () => {};
+    ( $builder : expr, $e : expr) => {
+        $builder.foreground_color_mut($e);
+    };
+}
+
+#[macro_export]
+macro_rules! message_bgc {
+    () => {};
+    ( $builder : expr, $e : expr ) => {
+        $builder.background_color_mut($e);
+    };
+}
+
+#[macro_export]
+macro_rules! message {
+    ( $( $e : expr ),* ) => {{
+        use crate::{
+            kernel::tty::tty::{MessageBuilder, BuilderFunctions},
+            message_msg, message_fgc, message_bgc
+        };
+        let mut tmp_builder = MessageBuilder::new();
+        $(
+            if let BuilderFunctions::Msg(e) = $e {
+                message_msg!(tmp_builder, e);
+            } else if let BuilderFunctions::FgColor(c) = $e {
+                message_fgc!(tmp_builder, c);
+            } else if let BuilderFunctions::BgColor(c) = $e {
+                message_bgc!(tmp_builder, c);
+            }
+        )*
+        tmp_builder.build()
+    }};
+}
diff --git a/src/kernel/tty/tty.c b/src/kernel/tty/tty.c
index b7c5b36..2d63e9d 100644
--- a/src/kernel/tty/tty.c
+++ b/src/kernel/tty/tty.c
@@ -11,26 +11,29 @@ tty_controller_t *tty_controller_new()
 {
     memset(tty_ctrler.ttys, 0, sizeof(tty_ctrler.ttys));
     memset(tty_ctrler.map, 0, sizeof(tty_ctrler.map));
+    memset(tty_ctrler.enabled, 0, sizeof(tty_ctrler.enabled));
     return &tty_ctrler;
 }
 
 tty *tty_new(tty_type type, tty_mode mode)
 {
-    tty *__tty = memm_allocate(sizeof(tty), 0);
-    memset(__tty, 0, sizeof(tty));
-    __tty->type = type;
-    __tty->mode = mode;
     tty *res = nullptr;
     for (usize i = 0; i < TTY_MAX_NUM; ++i)
     {
         if (tty_ctrler.map[i] == false)
         {
-            res = __tty;
-            __tty->id = i;
-            tty_ctrler.ttys[i] = __tty;
+            res = memm_kernel_allocate(sizeof(tty));
+            res->id = i;
+            tty_ctrler.ttys[i] = res;
             tty_ctrler.map[i] = true;
+            break;
         }
     }
+    res->type = type;
+    res->mode = mode;
+    res->enabled = false;
+    res->width = 0;
+    res->height = 0;
     return res;
 }
 
@@ -51,10 +54,14 @@ void tty_set_framebuffer(tty *ttyx, framebuffer *fb)
     if (ttyx->type != tty_type_raw_framebuffer)
         return;
     memcpy(&ttyx->typeinfo.raw_framebuffer, fb, sizeof(framebuffer));
+    ttyx->width = ttyx->typeinfo.raw_framebuffer.width;
+    ttyx->height = ttyx->typeinfo.raw_framebuffer.height;
     if (ttyx->mode == tty_mode_text)
     {
         ttyx->text.width = fb->width / tty_get_font()->char_width;
         ttyx->text.height = fb->height / tty_get_font()->char_height;
+        ttyx->text.line = 0;
+        ttyx->text.column = 0;
     }
 }
 
@@ -87,12 +94,13 @@ inline static void putchar(
                 {
                     for (usize b = 0; b < TTY_FONT_SCALE; ++b)
                     {
-                        put_pixel(ttyx->typeinfo.raw_framebuffer.pointer,
-                                  ttyx->typeinfo.raw_framebuffer.width,
-                                  ttyx->typeinfo.raw_framebuffer.pixsize,
-                                  ttyx->text.column * font->char_width * TTY_FONT_SCALE + i * TTY_FONT_SCALE + a,
-                                  ttyx->text.line * font->char_height * TTY_FONT_SCALE + j * TTY_FONT_SCALE + b,
-                                  color);
+                        put_pixel(
+                            ttyx->typeinfo.raw_framebuffer.pointer,
+                            ttyx->typeinfo.raw_framebuffer.width,
+                            ttyx->typeinfo.raw_framebuffer.pixsize,
+                            ttyx->text.column * font->char_width * TTY_FONT_SCALE + i * TTY_FONT_SCALE + a,
+                            ttyx->text.line * font->char_height * TTY_FONT_SCALE + j * TTY_FONT_SCALE + b,
+                            color);
                     }
                 }
             }
@@ -102,12 +110,13 @@ inline static void putchar(
                 {
                     for (usize b = 0; b < TTY_FONT_SCALE; ++b)
                     {
-                        put_pixel(ttyx->typeinfo.raw_framebuffer.pointer,
-                                  ttyx->typeinfo.raw_framebuffer.width,
-                                  ttyx->typeinfo.raw_framebuffer.pixsize,
-                                  ttyx->text.column * font->char_width * TTY_FONT_SCALE + i * TTY_FONT_SCALE + a,
-                                  ttyx->text.line * font->char_height * TTY_FONT_SCALE + j * TTY_FONT_SCALE + b,
-                                  bgcolor);
+                        put_pixel(
+                            ttyx->typeinfo.raw_framebuffer.pointer,
+                            ttyx->typeinfo.raw_framebuffer.width,
+                            ttyx->typeinfo.raw_framebuffer.pixsize,
+                            ttyx->text.column * font->char_width * TTY_FONT_SCALE + i * TTY_FONT_SCALE + a,
+                            ttyx->text.line * font->char_height * TTY_FONT_SCALE + j * TTY_FONT_SCALE + b,
+                            bgcolor);
                     }
                 }
             }
@@ -121,17 +130,23 @@ inline static void newline(tty *ttyx)
     ttyx->text.line++;
     if (ttyx->text.line == ttyx->text.height)
     {
-        scroll_buffer(ttyx->typeinfo.raw_framebuffer.pointer,
-                      ttyx->typeinfo.raw_framebuffer.width,
-                      ttyx->typeinfo.raw_framebuffer.height,
-                      ttyx->typeinfo.raw_framebuffer.pixsize,
-                      tty_get_font()->char_height * TTY_FONT_SCALE);
+        scroll_buffer(
+            ttyx->typeinfo.raw_framebuffer.pointer,
+            ttyx->typeinfo.raw_framebuffer.width,
+            ttyx->typeinfo.raw_framebuffer.height,
+            ttyx->typeinfo.raw_framebuffer.pixsize,
+            tty_get_font()->char_height * TTY_FONT_SCALE);
         ttyx->text.line--;
     }
 }
 
 void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor)
 {
+    if (ttyx->enabled == false)
+        return;
+    // TODO 暂时只支持framebuffer
+    if (ttyx->type != tty_type_raw_framebuffer)
+        return;
     if (ttyx->mode != tty_mode_text)
         return;
     if (ttyx->typeinfo.raw_framebuffer.pixtype == bgr)
@@ -147,13 +162,14 @@ void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor)
         }
     }
     tty_font_t *font = tty_get_font();
-    simple_lock_lock(ttyx->text.lock);
     usize len = strlen(string);
+    simple_lock_lock(ttyx->text.lock);
     for (char *str = string; string - str < len; string++)
     {
         char c = *string;
         if (c == '\n')
         { // 换行
+            putchar(ttyx, ' ', 0, 0);
             newline(ttyx);
             continue;
         }
@@ -173,11 +189,12 @@ void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor)
             ttyx->text.line++;
             if (ttyx->text.line == ttyx->text.height)
             {
-                scroll_buffer(ttyx->typeinfo.raw_framebuffer.pointer,
-                              ttyx->typeinfo.raw_framebuffer.width,
-                              ttyx->typeinfo.raw_framebuffer.height,
-                              ttyx->typeinfo.raw_framebuffer.pixsize,
-                              font->char_height * TTY_FONT_SCALE);
+                scroll_buffer(
+                    ttyx->typeinfo.raw_framebuffer.pointer,
+                    ttyx->typeinfo.raw_framebuffer.width,
+                    ttyx->typeinfo.raw_framebuffer.height,
+                    ttyx->typeinfo.raw_framebuffer.pixsize,
+                    font->char_height * TTY_FONT_SCALE);
                 ttyx->text.line--;
             }
             continue;
@@ -192,11 +209,12 @@ void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor)
         }
         else if (c == '\f')
         { // 滚动一行
-            scroll_buffer(ttyx->typeinfo.raw_framebuffer.pointer,
-                          ttyx->typeinfo.raw_framebuffer.width,
-                          ttyx->typeinfo.raw_framebuffer.height,
-                          ttyx->typeinfo.raw_framebuffer.pixsize,
-                          font->char_height * TTY_FONT_SCALE);
+            scroll_buffer(
+                ttyx->typeinfo.raw_framebuffer.pointer,
+                ttyx->typeinfo.raw_framebuffer.width,
+                ttyx->typeinfo.raw_framebuffer.height,
+                ttyx->typeinfo.raw_framebuffer.pixsize,
+                font->char_height * TTY_FONT_SCALE);
             continue;
         }
         // 打印字符c
@@ -213,3 +231,58 @@ void tty_text_print(tty *ttyx, char *string, u32 color, u32 bgcolor)
     putchar(ttyx, '\0', gen_color(0x88, 0x88, 0x88), 0);
     simple_lock_unlock(ttyx->text.lock);
 }
+
+usize tty_get_width(tty *ttyx)
+{
+    if (ttyx->mode == tty_mode_text)
+        return ttyx->text.width;
+    return ttyx->width;
+}
+
+usize tty_get_height(tty *ttyx)
+{
+    if (ttyx->mode == tty_mode_text)
+        return ttyx->text.height;
+    return ttyx->height;
+}
+
+tty_type tty_get_type(tty *ttyx)
+{
+    return ttyx->type;
+}
+
+tty_mode tty_get_mode(tty *ttyx)
+{
+    return ttyx->mode;
+}
+
+bool tty_is_enabled(tty *ttyx)
+{
+    return ttyx->enabled;
+}
+
+bool tty_enable(tty *ttyx)
+{
+    if (tty_ctrler.enabled[ttyx->id])
+        return false;
+    if (ttyx->type == tty_type_raw_framebuffer)
+    {
+        for (usize i = 0; i < TTY_MAX_NUM; ++i)
+        {
+            if (ttyx->id != i &&
+                tty_ctrler.enabled[i] != nullptr &&
+                tty_ctrler.ttys[i]->type == tty_type_raw_framebuffer)
+                return false;
+        }
+    }
+
+    ttyx->enabled = true;
+    tty_ctrler.enabled[ttyx->id] = ttyx;
+    return true;
+}
+
+void tty_disable(tty *ttyx)
+{
+    ttyx->enabled = false;
+    tty_ctrler.enabled[ttyx->id] = false;
+}
diff --git a/src/kernel/tty/tty.rs b/src/kernel/tty/tty.rs
index 2d6aa59..50b1470 100644
--- a/src/kernel/tty/tty.rs
+++ b/src/kernel/tty/tty.rs
@@ -1,25 +1,61 @@
-use std::{
-    io::{BufWriter, Write},
-    ptr::null_mut,
+use core::ptr::null_mut;
+
+use alloc::{
+    string::{String, ToString},
+    vec,
+    vec::Vec,
 };
 
 extern "C" {
-    fn tty_new(tty_type: u8, mode: u8) -> *mut u8;
-    fn tty_get(id: usize) -> *mut *mut u8;
+    pub fn tty_new(tty_type: u8, mode: u8) -> *mut u8;
+    pub fn tty_get(id: usize) -> *mut *mut u8;
     pub fn tty_text_print(ttyx: *mut u8, string: *mut u8, color: u32, bgcolor: u32);
-    fn tty_get_id(tty: *mut u8) -> usize;
+    pub fn tty_get_id(tty: *mut u8) -> usize;
+
+    pub fn tty_get_width(tty: *mut u8) -> usize;
+    pub fn tty_get_height(tty: *mut u8) -> usize;
+
+    pub fn tty_get_type(tty: *mut u8) -> u8;
+    pub fn tty_get_mode(tty: *mut u8) -> u8;
+
+    pub fn tty_is_enabled(tty: *mut u8) -> bool;
+
+    pub fn tty_enable(tty: *mut u8) -> bool;
+    pub fn tty_disable(tty: *mut u8);
 }
 
 pub enum Type {
     Invalid = 0,
     RawFramebuffer = 1,
     Display = 2,
-    VirtualTty = 3,
+    VirtualTerm = 3,
+}
+
+impl From<u8> for Type {
+    fn from(value: u8) -> Self {
+        match value {
+            1 => Type::RawFramebuffer,
+            2 => Type::Display,
+            3 => Type::VirtualTerm,
+            _ => Type::Invalid,
+        }
+    }
 }
 
 pub enum Mode {
-    Text = 0,
-    Graphics = 1,
+    Invalid = 0,
+    Text = 1,
+    Graphics = 2,
+}
+
+impl From<u8> for Mode {
+    fn from(value: u8) -> Self {
+        match value {
+            1 => Mode::Text,
+            2 => Mode::Graphics,
+            _ => Mode::Invalid,
+        }
+    }
 }
 
 pub struct Tty {
@@ -50,12 +86,43 @@ impl Tty {
         unsafe { tty_get_id(self.tty_pointer) }
     }
 
+    pub fn size(&self) -> Resolution {
+        unsafe {
+            Resolution {
+                width: tty_get_width(self.tty_pointer),
+                height: tty_get_height(self.tty_pointer),
+            }
+        }
+    }
+
+    pub fn get_type(&self) -> Type {
+        let tp = unsafe { tty_get_type(self.tty_pointer) };
+        Type::from(tp)
+    }
+
+    pub fn mode(&self) -> Mode {
+        let mode = unsafe { tty_get_mode(self.tty_pointer) };
+        Mode::from(mode)
+    }
+
+    pub fn is_enabled(&self) -> bool {
+        unsafe { tty_is_enabled(self.tty_pointer) }
+    }
+
+    pub fn enable(&self) {
+        unsafe { tty_enable(self.tty_pointer) };
+    }
+
+    pub fn disable(&self) {
+        unsafe { tty_disable(self.tty_pointer) };
+    }
+
     pub fn print(&self, msg: Message) {
         for MessageSection {
             mut msg,
             fgcolor,
             bgcolor,
-        } in msg.into_iter()
+        } in msg.0.into_iter()
         {
             unsafe {
                 let string = msg.as_bytes_mut() as *mut [u8] as *mut u8;
@@ -74,8 +141,21 @@ impl Tty {
     }
 }
 
+#[derive(Clone, Copy)]
 pub struct Color(pub u8, pub u8, pub u8);
 
+impl Color {
+    pub const WHITE: Color = Color(0xee, 0xee, 0xee);
+    pub const BLACK: Color = Color(0, 0, 0);
+    pub const RED: Color = Color(0xee, 0x22, 0x22);
+    pub const GREEN: Color = Color(0x22, 0xee, 0x22);
+    pub const BLUE: Color = Color(0x22, 0x22, 0xee);
+    pub const YELLOW: Color = Color(0xee, 0x22, 0x22);
+    pub const ORANGE: Color = Color(0xee, 0xee, 0x22);
+    pub const PURPLE: Color = Color(0xee, 0, 0xee);
+    pub const PINK: Color = Color(0xee, 0x44, 0x66);
+}
+
 impl From<Color> for u32 {
     fn from(value: Color) -> Self {
         let res = (value.0 as u32) << 16 | (value.1 as u32) << 8 | (value.2 as u32);
@@ -83,46 +163,117 @@ impl From<Color> for u32 {
     }
 }
 
+pub struct Resolution {
+    pub width: usize,
+    pub height: usize,
+}
+
+#[derive(Clone)]
 pub struct MessageSection {
     msg: String,
     fgcolor: Color,
     bgcolor: Color,
 }
 
-type Message = Vec<MessageSection>;
+/// ## Message
+///
+/// 用`MessageBuilder`构造一个`Message`对象
+#[derive(Clone)]
+pub struct Message(Vec<MessageSection>);
 
+/// ## MessageBuilder
+///
+/// 使用链式调用模式构造一个消息.
+///
+/// 一个`Message`包含多个`MessageSection`，每个`MessageSection`以`message()`调用开始，
+/// `message()`调用后可接0个或多个属性设置。
+///
+/// ```rust
+/// MessageBuilder::new()
+///     .message("Hello, ")
+///     .message("Metaverse").foreground_color(Color(0xa, 0xee, 0xa))
+///     .message("!\n")
+///     .build();
+/// ```
+///
+/// 对于特殊情况可以使用非链式调用：
+/// ```rust
+/// let mut msg = MessageBuilder::new();
+/// msg.message_mut("Hello, ");
+/// msg.message_mut("Metaverse");
+/// msg.foreground_color(Color(0xa, 0xee, 0xa));
+/// msg.message_mut("!\n");
+/// let msg = msg.build();
+/// ```
 pub struct MessageBuilder {
     msg: Message,
 }
 
+pub enum BuilderFunctions<'a> {
+    Msg(&'a str),
+    FgColor(Color),
+    BgColor(Color),
+}
+
 impl MessageBuilder {
     pub fn new() -> Self {
-        Self { msg: vec![] }
+        Self {
+            msg: Message(vec![]),
+        }
     }
 
-    pub fn message(mut self, msg: String) -> Self {
-        self.msg.push(MessageSection {
-            msg,
+    pub fn from_message(msg: Message) -> Self {
+        Self { msg }
+    }
+
+    pub fn message(mut self, msg: &str) -> Self {
+        self.msg.0.push(MessageSection {
+            msg: msg.to_string(),
             fgcolor: Color(0xee, 0xee, 0xee),
             bgcolor: Color(0, 0, 0),
         });
         self
     }
 
+    pub fn message_mut(&mut self, msg: &str) {
+        self.msg.0.push(MessageSection {
+            msg: msg.to_string(),
+            fgcolor: Color(0xee, 0xee, 0xee),
+            bgcolor: Color(0, 0, 0),
+        });
+    }
+
     pub fn background_color(mut self, color: Color) -> Self {
-        if let Some(msg) = self.msg.last_mut() {
+        if let Some(msg) = self.msg.0.last_mut() {
             msg.bgcolor = color;
         }
         self
     }
 
+    pub fn background_color_mut(&mut self, color: Color) {
+        if let Some(msg) = self.msg.0.last_mut() {
+            msg.bgcolor = color;
+        }
+    }
+
     pub fn foreground_color(mut self, color: Color) -> Self {
-        if let Some(msg) = self.msg.last_mut() {
+        if let Some(msg) = self.msg.0.last_mut() {
             msg.fgcolor = color;
         }
         self
     }
 
+    pub fn foreground_color_mut(&mut self, color: Color) {
+        if let Some(msg) = self.msg.0.last_mut() {
+            msg.fgcolor = color;
+        }
+    }
+
+    pub fn append(mut self, mut builder: Self) -> Self {
+        self.msg.0.append(&mut builder.msg.0);
+        self
+    }
+
     pub fn build(self) -> Message {
         self.msg
     }
diff --git a/src/lib.rs b/src/lib.rs
index be290dc..e8ac072 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,69 @@
-extern crate core;
+#![no_std]
+
+extern crate alloc;
+
+use alloc::{
+    string::{String, ToString},
+    vec::Vec,
+};
+use core::{panic::PanicInfo, ptr::null_mut};
+
+use kernel::tty::tty::{self, tty_enable, tty_text_print, Color};
 
 pub mod kernel;
 pub mod libk;
+
+#[panic_handler]
+unsafe fn kernel_panic_handler(info: &PanicInfo) -> ! {
+    let line_in_file = if let Some(loca) = info.location() {
+        loca.line().to_string()
+    } else {
+        String::new()
+    };
+    let info = {
+        let mut v = Vec::new();
+        v.push(("Kernel Panic: ", (Color::RED, Color::BLACK)));
+        v.push((
+            if let Some(loca) = info.location() {
+                loca.file()
+            } else {
+                "NoFile"
+            },
+            (Color::GREEN, Color::BLACK),
+        ));
+        v.push((":", (Color::WHITE, Color::BLACK)));
+        v.push((
+            if let Some(_) = info.location() {
+                line_in_file.as_str()
+            } else {
+                "NoLine"
+            },
+            (Color::WHITE, Color::BLACK),
+        ));
+        v.push((": ", (Color::WHITE, Color::BLACK)));
+        v.push((
+            if let Some(&s) = info.payload().downcast_ref::<&str>() {
+                s
+            } else {
+                "Unknown panic."
+            },
+            (Color::BLUE, Color::BLACK),
+        ));
+        v.push(("\n", (Color::BLACK, Color::BLACK)));
+        v
+    };
+    let tty = tty::tty_get(0);
+    if tty != null_mut() {
+        let tty = *tty;
+        tty_enable(tty);
+        for (msgo, (fgc, bgc)) in info.into_iter() {
+            let msg = String::from(msgo).as_bytes_mut() as *mut [u8] as *mut u8;
+            let p = msg.offset(msgo.len() as isize);
+            let swp = *p;
+            *p = 0;
+            tty_text_print(tty, msg, u32::from(fgc), u32::from(bgc));
+            *p = swp;
+        }
+    }
+    loop {}
+}
diff --git a/src/libk/lst.c b/src/libk/lst.c
index cbfcce0..b858723 100644
--- a/src/libk/lst.c
+++ b/src/libk/lst.c
@@ -7,7 +7,7 @@
 
 lst_iterator_t *lst_new(usize start, usize end)
 {
-    lst_iterator_t *lst = memm_allocate(sizeof(lst_iterator_t), 0);
+    lst_iterator_t *lst = memm_kernel_allocate(sizeof(lst_iterator_t));
     lst->line.left = start;
     lst->line.right = end;
     lst->next = nullptr;
@@ -128,7 +128,7 @@ bool lst_add(lst_iterator_t *lst, usize left, usize right, bool force)
                 lst->line.left = left;
             else
             {
-                lst_iterator_t *new_node = memm_allocate(sizeof(lst_iterator_t), 0);
+                lst_iterator_t *new_node = memm_kernel_allocate(sizeof(lst_iterator_t));
                 new_node->line = line;
                 new_node->next = lst;
                 if (last != nullptr)
diff --git a/src/libk/mod.rs b/src/libk/mod.rs
index e69de29..d245b85 100644
--- a/src/libk/mod.rs
+++ b/src/libk/mod.rs
@@ -0,0 +1 @@
+pub mod string;
diff --git a/src/kernel/klog/klog.rs b/src/libk/string/mod.rs
similarity index 100%
rename from src/kernel/klog/klog.rs
rename to src/libk/string/mod.rs
diff --git a/src/metaverse.lds b/src/metaverse.lds
index 7bb371b..87da7f2 100644
--- a/src/metaverse.lds
+++ b/src/metaverse.lds
@@ -17,12 +17,6 @@ SECTIONS {
     {
         *(.cpumeta)
     }
-    . = 4M;
-    ..kstack :
-    {
-        kstack = .;
-        *(.kstack)
-    }
     . = 16M;
     .text :
     {
@@ -62,8 +56,52 @@ SECTIONS {
     {}
     .igot.plt :
     {}
+    .tbss :
+    {
+        *(.tbss)
+    }
+    .tdata :
+    {
+        *(.tdata)
+    }
+    .debug_line :
+    {
+        *(.debug_line)
+    }
+    .debug_abbrev :
+    {
+        *(.debug_abbrev)
+    }
+    .debug_info :
+    {
+        *(.debug_info)
+    }
+    .debug_str :
+    {
+        *(.debug_str)
+    }
+    .debug_aranges :
+    {
+        *(.debug_aranges)
+    }
+    .debug_ranges :
+    {
+        *(.debug_ranges)
+    }
+    .debug_pubnames :
+    {
+        *(.debug_pubnames)
+    }
+    .debug_pubtypes :
+    {
+        *(.debug_pubtypes)
+    }
+    .debug_frame :
+    {
+        *(.debug_frame)
+    }
     .kend :
     {
         *(.kend)
     }
-}
\ No newline at end of file
+}