Add stdout/stderr to mikros PAL

library/std/src/sys/pal/mikros/stdio.rs

@@ -1,4 +1,5 @@
 use crate::io;
+use crate::arch::asm;
 
 pub struct Stdin;
 pub struct Stdout;
@@ -24,6 +25,11 @@ pub const fn new() -> Stdout {
 
 impl io::Write for Stdout {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        for byte in buf {
+            unsafe {
+                asm!("int 0x80", in("rax") 0, in ("rcx") *byte as u64);
+            };
+        }
         Ok(buf.len())
     }
 
@@ -40,6 +46,11 @@ pub const fn new() -> Stderr {
 
 impl io::Write for Stderr {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        for byte in buf {
+            unsafe {
+                asm!("int 0x80", in("rax") 0, in ("rcx") *byte as u64);
+            };
+        }
         Ok(buf.len())
     }
 
@@ -54,6 +65,6 @@ pub fn is_ebadf(_err: &io::Error) -> bool {
     true
 }
 
-pub fn panic_output() -> Option<Vec<u8>> {
-    None
+pub fn panic_output() -> Option<impl io::Write> {
+    Some(Stderr::new())
 }