From 128078e9f967d7f2932c008b9df755c59d040729 Mon Sep 17 00:00:00 2001
From: pjht <pterpstra@pterpstra.com>
Date: Sun, 2 Jun 2024 10:58:18 -0500
Subject: [PATCH] Add stdout/stderr to mikros PAL

---
 library/std/src/sys/pal/mikros/stdio.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/library/std/src/sys/pal/mikros/stdio.rs b/library/std/src/sys/pal/mikros/stdio.rs
index b5e3f5be988..067bac6d069 100644
--- a/library/std/src/sys/pal/mikros/stdio.rs
+++ b/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())
 }