Tiny changes

src/arch/x86_64/interrupt/trapframe.rs

@@ -56,6 +56,9 @@ impl TrapFrame {
         tf.rflags = 0x282;
         tf
     }
+    pub fn is_user(&self) -> bool {
+        self.cs & 0x3 == 0x3
+    }
 }
 
 #[derive(Debug, Default)]

src/io/mod.rs

@@ -68,7 +68,10 @@ impl Log for SimpleLogger {
 //        metadata.level() <= Level::Info
     }
     fn log(&self, record: &Record) {
-        if self.enabled(record.metadata()) {
+        static DISABLED_TARGET: &[&str] = &[
+            "rust_ucore::process::scheduler::rr",
+        ];
+        if self.enabled(record.metadata()) && !DISABLED_TARGET.contains(&record.target()) {
             print_in_color(format_args!("[{}] {}\n", record.target(), record.args()), Color::from(record.level()));
         }
     }

src/lang.rs

@@ -10,8 +10,7 @@ extern fn eh_personality() {
 #[lang = "panic_fmt"]
 #[no_mangle]
 pub extern fn panic_fmt(fmt: core::fmt::Arguments, file: &'static str, line: u32) -> ! {
-    error!("\n\nPANIC in {} at line {}:", file, line);
+    error!("\n\nPANIC in {} at line {}\n    {}", file, line, fmt);
-    error!("    {}", fmt);
     if cfg!(feature = "qemu_auto_exit") {
         unsafe{ cpu::exit_in_qemu(3) }
     } else {