Add the IDT table

src/main.zig

@@ -1,7 +1,11 @@
 const lazy = @import("utils/Lazy.zig").lazy;
 const Console = @import("Console.zig");
+
 const MultibootInfo = @import("multiboot.zig").Info;
 
+const InterruptDescriptorTable = @import("idt.zig").InterruptDescriptorTable;
+const InterruptStackFrame = @import("idt.zig").InterruptStackFrame;
+
 const MultibootHeader = packed struct {
     magic: i32,
     flags: i32,
@@ -37,6 +41,8 @@ export fn _start() callconv(.naked) noreturn {
 
 var console = lazy(Console, .init);
 
+var idt: InterruptDescriptorTable = .empty;
+
 fn kmain(magic: u32, info: *const MultibootInfo) callconv(.c) void {
     std.debug.assert(magic == MAGIC);
 
@@ -49,9 +55,24 @@ fn kmain(magic: u32, info: *const MultibootInfo) callconv(.c) void {
         std.log.info("Booted with cmdline \"{s}\"", .{info.cmdline});
     }
 
+    idt.setEntry(.breakpoint, breakpointHandler);
+    idt.load();
+
+    //asm volatile (
+    //    \\ int3
+    //    :
+    //    :
+    //);
+
     hang();
 }
 
+fn breakpointHandler(stack_frame: *InterruptStackFrame) callconv(.{ .x86_interrupt = .{} }) void {
+    _ = stack_frame;
+
+    std.log.err("breakpoint\n", .{});
+}
+
 fn hang() noreturn {
     while (true) asm volatile ("hlt");
 }