feat(userspace): terminal server + shell desktop; US keymap w/ shift; libkos allocator multi-page fix; panics print

crates/drivers/input/virtio/src/lib.rs

@@ -1,5 +1,7 @@
 #![no_std]
 
+mod keymap;
+
 use hw_virtio::mmio::MmioAccess;
 use port_input_device::{InputDevice, InputEvent, Key};
 
@@ -28,6 +30,7 @@ pub struct VirtioInputDevice {
     last_used: u16,
     next_avail: u16,
     evbuf_pa: usize,
+    shift: bool,
 }
 
 impl VirtioInputDevice {
@@ -45,7 +48,7 @@ impl VirtioInputDevice {
         let evbuf_pa = libkos::device::dma(1, EVBUF_VA).ok()?;
         hw_virtio::mmio::init_legacy_device(&regs, vq_pa, QUEUE_SIZE as u32);
 
-        let mut dev = Self { last_used: 0, next_avail: 0, evbuf_pa };
+        let mut dev = Self { last_used: 0, next_avail: 0, evbuf_pa, shift: false };
         dev.fill_queue();
         Some(dev)
     }
@@ -118,25 +121,6 @@ impl VirtioInputDevice {
     }
 }
 
-fn linux_keycode_to_key(code: u16) -> Option<Key> {
-    match code {
-        17 => Some(Key::Up),    // KEY_W
-        31 => Some(Key::Down),  // KEY_S
-        30 => Some(Key::Left),  // KEY_A
-        32 => Some(Key::Right), // KEY_D
-        103 => Some(Key::Up),   // KEY_UP
-        108 => Some(Key::Down), // KEY_DOWN
-        105 => Some(Key::Left), // KEY_LEFT
-        106 => Some(Key::Right),// KEY_RIGHT
-        28 => Some(Key::Enter), // KEY_ENTER
-        1 => Some(Key::Escape), // KEY_ESC
-        57 => Some(Key::Space), // KEY_SPACE
-        14 => Some(Key::Backspace), // KEY_BACKSPACE
-        15 => Some(Key::Tab),   // KEY_TAB
-        _ => None,
-    }
-}
-
 impl InputDevice for VirtioInputDevice {
     fn poll(&mut self) -> Option<InputEvent> {
         loop {
@@ -151,8 +135,12 @@ impl InputDevice for VirtioInputDevice {
             let (ev_type, ev_code, ev_value) = self.read_event(desc_idx);
             self.resubmit(desc_idx);
 
+            if ev_type == EV_KEY && matches!(ev_code, keymap::LEFT_SHIFT | keymap::RIGHT_SHIFT) {
+                self.shift = ev_value != 0;
+                continue;
+            }
             if ev_type == EV_KEY {
-                if let Some(key) = linux_keycode_to_key(ev_code) {
+                if let Some(key) = keymap::key(ev_code, self.shift) {
                     if ev_value == KEY_PRESS {
                         return Some(InputEvent::KeyDown(key));
                     } else if ev_value == 0 {