Fixed kbd (buffer flush)

src/idt/idt.S

@@ -151,12 +151,13 @@ vector_7_handler:
 align 16
 vector_8_handler:
     ; No error code, we only push vector number
-    push qword 1
+    push qword 8
     jmp interrupt_stub
 
 ; Coprocessor Segment Overrun
 align 16
 vector_9_handler:
+    push qword 0
     push qword 9
     jmp interrupt_stub
 

src/idt/idt.c

@@ -54,7 +54,7 @@ void idt_init()
 {
     // We set 256 entries, but we have only the first few stubs.
     // Undefined behavior?
-    for (size_t i=0; i<256; i++)
+    for (size_t i=0; i<=33; i++)
     {
         // Each vector handler is 16-byte aligned, so <vector_no>*16 = address of that handler
         idt_set_entry(i, vector_0_handler + (i*16), 0);
@@ -210,6 +210,7 @@ struct cpu_status_t* interrupt_dispatch(struct cpu_status_t* context)
         case 33:
             DEBUG("Keyboard Interrupt");
             keyboard_handler();
+            outb(0x20, 0x20);
             break;
 
         default:

src/io/kbd/ps2.c

@@ -176,9 +176,6 @@ void keyboard_handler()
                 key_status &= ~ALT_PRESSED_BIT;
                 break;
         }
-
-        // Send EOI
-        outb(0x20, 0x20);
         return;
     }
     else
@@ -199,6 +196,9 @@ void keyboard_handler()
                 break;
 
             default:
+            {
+                // Avoiding buffer overflow from extended keys lol
+                if (scancode < 128)
                 {
                     // Should we get a SHIFTED char or a regular one?
                     unsigned char c = (key_status & SHIFT_PRESSED_BIT) ? keymap_shifted[scancode] : keymap[scancode];
@@ -211,9 +211,7 @@ void keyboard_handler()
                 }
             }
         }
-
+    }
-    // End of Interrupt (to master PIC)
-    outb(0x20, 0x20);
 }
 
 void keyboard_init(unsigned char layout)
@@ -233,10 +231,16 @@ void keyboard_init(unsigned char layout)
             break;
         
         default:
-            skputs("Unsupported layout.");
+            panic(NULL, "Unsupported keyboard layout");
             return;
     }
 
+    // Flush keyboard buffer
+    while (inb(0x64) & 1)
+    {
+        inb(0x60);
+    }
+
     // Unmask IRQ1
     uint8_t mask = inb(0x21);
     mask &= ~(1 << 1);

src/io/serial/serial.c

@@ -54,6 +54,7 @@ static int is_transmit_empty()
 // Serial kernel putchar
 void skputc(char c)
 {
+    // TODO: Spinlock here (serial access)
     while (!is_transmit_empty()); // wait for free spot
     outb(PORT, c);
 }

src/io/term/term.c

@@ -22,6 +22,7 @@ extern struct flanterm_context* ft_ctx;
 // Overhead that could be avoided, right? (for printf)
 void _putchar(char character)
 {
+	// TODO: Spinlock here (terminal access)
 	flanterm_write(ft_ctx, &character, 1);
 }