Add a new keyboard module which handles the kbd_read syscall and add the

required headers and keycode constants to make it work.

src/keyboard.rs

@@ -0,0 +1,147 @@
+use crate::syscall::{KBD_READ, syscall2};
+
+pub const ESCAPE: u16 = 0;
+pub const F1: u16 = 1;
+pub const F2: u16 = 2;
+pub const F3: u16 = 3;
+pub const F4: u16 = 4;
+pub const F5: u16 = 5;
+pub const F6: u16 = 6;
+pub const F7: u16 = 7;
+pub const F8: u16 = 8;
+pub const F9: u16 = 9;
+pub const F10: u16 = 10;
+pub const F11: u16 = 11;
+pub const F12: u16 = 12;
+pub const PRINT_SCREEN: u16 = 13;
+pub const SYS_RQ: u16 = 14;
+pub const SCROLL_LOCK: u16 = 15;
+pub const PAUSE_BREAK: u16 = 16;
+pub const OEM8: u16 = 17;
+pub const KEY1: u16 = 18;
+pub const KEY2: u16 = 19;
+pub const KEY3: u16 = 20;
+pub const KEY4: u16 = 21;
+pub const KEY5: u16 = 22;
+pub const KEY6: u16 = 23;
+pub const KEY7: u16 = 24;
+pub const KEY8: u16 = 25;
+pub const KEY9: u16 = 26;
+pub const KEY0: u16 = 27;
+pub const OEM_MINUS: u16 = 28;
+pub const OEM_PLUS: u16 = 29;
+pub const BACKSPACE: u16 = 30;
+pub const INSERT: u16 = 31;
+pub const HOME: u16 = 32;
+pub const PAGE_UP: u16 = 33;
+pub const NUMPAD_LOCK: u16 = 34;
+pub const NUMPAD_DIVIDE: u16 = 35;
+pub const NUMPAD_MULTIPLY: u16 = 36;
+pub const NUMPAD_SUBTRACT: u16 = 37;
+pub const TAB: u16 = 38;
+pub const Q: u16 = 39;
+pub const W: u16 = 40;
+pub const E: u16 = 41;
+pub const R: u16 = 42;
+pub const T: u16 = 43;
+pub const Y: u16 = 44;
+pub const U: u16 = 45;
+pub const I: u16 = 46;
+pub const O: u16 = 47;
+pub const P: u16 = 48;
+pub const OEM4: u16 = 49;
+pub const OEM6: u16 = 50;
+pub const OEM5: u16 = 51;
+pub const OEM7: u16 = 52;
+pub const DELETE: u16 = 53;
+pub const END: u16 = 54;
+pub const PAGE_DOWN: u16 = 55;
+pub const NUMPAD7: u16 = 56;
+pub const NUMPAD8: u16 = 57;
+pub const NUMPAD9: u16 = 58;
+pub const NUMPAD_ADD: u16 = 59;
+pub const CAPS_LOCK: u16 = 60;
+pub const A: u16 = 61;
+pub const S: u16 = 62;
+pub const D: u16 = 63;
+pub const F: u16 = 64;
+pub const G: u16 = 65;
+pub const H: u16 = 66;
+pub const J: u16 = 67;
+pub const K: u16 = 68;
+pub const L: u16 = 69;
+pub const OEM1: u16 = 70;
+pub const OEM3: u16 = 71;
+pub const RETURN: u16 = 72;
+pub const NUMPAD4: u16 = 73;
+pub const NUMPAD5: u16 = 74;
+pub const NUMPAD6: u16 = 75;
+pub const L_SHIFT: u16 = 76;
+pub const Z: u16 = 77;
+pub const X: u16 = 78;
+pub const C: u16 = 79;
+pub const V: u16 = 80;
+pub const B: u16 = 81;
+pub const N: u16 = 82;
+pub const M: u16 = 83;
+pub const OEM_COMMA: u16 = 84;
+pub const OEM_PERIOD: u16 = 85;
+pub const OEM2: u16 = 86;
+pub const R_SHIFT: u16 = 87;
+pub const ARROW_UP: u16 = 88;
+pub const NUMPAD1: u16 = 89;
+pub const NUMPAD2: u16 = 90;
+pub const NUMPAD3: u16 = 91;
+pub const NUMPAD_ENTER: u16 = 92;
+pub const L_CONTROL: u16 = 93;
+pub const L_WIN: u16 = 94;
+pub const L_ALT: u16 = 95;
+pub const SPACEBAR: u16 = 96;
+pub const R_ALT_GR: u16 = 97;
+pub const R_WIN: u16 = 98;
+pub const APPS: u16 = 99;
+pub const R_CONTROL: u16 = 100;
+pub const ARROW_LEFT: u16 = 101;
+pub const ARROW_DOWN: u16 = 102;
+pub const ARROW_RIGHT: u16 = 103;
+pub const NUMPAD0: u16 = 104;
+pub const NUMPAD_PERIOD: u16 = 105;
+pub const OEM9: u16 = 106;
+pub const OEM10: u16 = 107;
+pub const OEM11: u16 = 108;
+pub const OEM12: u16 = 109;
+pub const OEM13: u16 = 110;
+pub const PREV_TRACK: u16 = 111;
+pub const NEXT_TRACK: u16 = 112;
+pub const MUTE: u16 = 113;
+pub const CALCULATOR: u16 = 114;
+pub const PLAY: u16 = 115;
+pub const STOP: u16 = 116;
+pub const VOLUME_DOWN: u16 = 117;
+pub const VOLUME_UP: u16 = 118;
+pub const WWW_HOME: u16 = 119;
+pub const POWER_ON_TEST_OK: u16 = 120;
+pub const TOO_MANY_KEYS: u16 = 121;
+pub const R_CONTROL2: u16 = 122;
+pub const R_ALT2: u16 = 123;
+
+#[repr(C)]
+#[derive(Clone, Debug, Copy, Default)]
+pub struct KeyboardEvent {
+    pub state: u8,
+    pub _pad1: u8,
+    pub key: u16,
+    pub mods: u16,
+    pub _pad2: u16,
+    pub unicode: u32,
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn kbd_read(buf: *mut KeyboardEvent, n: u8) -> i32 {
+    let len = unsafe { syscall2(KBD_READ, buf as isize, n as isize) };
+    if len < 0 {
+        return -1;
+    } else {
+        return len as i32;
+    }
+}

src/lib.rs

@@ -14,6 +14,7 @@ use crate::{
 
 pub mod file;
 pub mod heap;
+pub mod keyboard;
 pub mod mem;
 pub mod syscall;
 pub mod time;
@@ -38,7 +39,7 @@ static TOUPPER_TABLE: [i32; 384] = {
 
 #[unsafe(no_mangle)]
 extern "C" fn write(fd: i32, buf: *const u8, count: usize) -> isize {
-    unsafe { syscall3(WRITE, fd as isize, buf as isize, count as isize) }
+    0 // unsafe { syscall3(WRITE, fd as isize, buf as isize, count as isize) }
 }
 
 #[unsafe(no_mangle)]

src/syscall.rs

@@ -19,6 +19,7 @@ pub const UNLINK: usize = 87;
 pub const GETDENTS64: usize = 217;
 pub const CLOCK_GETTIME: usize = 228;
 pub const EXIT_GROUP: usize = 231;
+pub const KBD_READ: usize = 666;
 pub const SLEEP: usize = 909090; // zzz haha
 pub const DRAW_PIXEL: usize = 5555;
 pub const DRAW_BUFFER: usize = 7777;
@@ -57,6 +58,24 @@ pub unsafe fn syscall1(num: usize, arg0: isize) -> isize {
     ret
 }
 
+#[inline(always)]
+pub unsafe fn syscall2(num: usize, arg0: isize, arg1: isize) -> isize {
+    let ret: isize;
+    unsafe {
+        core::arch::asm!(
+            "int 0x80",
+            in("rax") num,
+            in("rdi") arg0,
+            in("rsi") arg1,
+            lateout("rax") ret,
+            clobber_abi("sysv64"),
+            options(nostack)
+        );
+    }
+
+    ret
+}
+
 #[inline(always)]
 pub unsafe fn syscall3(num: usize, arg0: isize, arg1: isize, arg2: isize) -> isize {
     let ret: isize;