完善Tty的RawMode (#577)

* 完善rowmode，改掉一部分bug

* 增加两个ansi拓展功能功能，以及标记部分函数nerve inline

* 修改do_signal和其他中断上下文锁未关中断，以及拓展tty功能，修改tty几个算法bug

* 修改两个锁

* 修改syscall_64

* update

kernel/src/libs/printk.c

@@ -599,7 +599,7 @@ int printk_color(unsigned int FRcolor, unsigned int BKcolor, const char *fmt, ..
     io_mfence();
     va_list args;
     va_start(args, fmt);
-    char buf[4096]; // vsprintf()的缓冲区
+    static char buf[4096]; // vsprintf()的缓冲区
     int len = vsprintf(buf, fmt, args);
 
     va_end(args);

kernel/src/libs/rwlock.rs

@@ -218,6 +218,23 @@ impl<T> RwLock<T> {
         return r;
     } //当架构为arm时,有些代码需要作出调整compare_exchange=>compare_exchange_weak
 
+    #[cfg(any(target_arch = "x86_64", target_arch = "riscv64"))]
+    #[allow(dead_code)]
+    #[inline]
+    pub fn try_write_irqsave(&self) -> Option<RwLockWriteGuard<T>> {
+        ProcessManager::preempt_disable();
+        let irq_guard = unsafe { CurrentIrqArch::save_and_disable_irq() };
+        let r = self.inner_try_write().map(|mut g| {
+            g.irq_guard = Some(irq_guard);
+            g
+        });
+        if r.is_none() {
+            ProcessManager::preempt_enable();
+        }
+
+        return r;
+    }
+
     #[cfg(any(target_arch = "x86_64", target_arch = "riscv64"))]
     #[allow(dead_code)]
     fn inner_try_write(&self) -> Option<RwLockWriteGuard<T>> {