Quick backspace fix

src/io/term.c

@@ -87,11 +87,26 @@ void putchar(char c)
 		return;
 	}
 
-	// Improperly handled.
+	// TODO: Improperly handled.
 	// When we're on an empty line it should get to the upper line's last character
+	// NOT just the last position possible; we would need to track the last line's character amount for that
 	if (c == '\b')
 	{
-		cursor.x--;
+		if (cursor.x == 0 && cursor.y == 0)
+		{
+			// Top-left corner
+			return;
+		}
+
+		if (cursor.x == 0)
+		{
+			cursor.y--;
+			cursor.x = (framebuffer->width / FONT_WIDTH) -1; // here
+		}
+		else {
+			cursor.x--;
+		}
+
 		int px = cursor.x * FONT_WIDTH;
 		int py = cursor.y * FONT_HEIGHT;
 		erase_char(px, py);