Fix GPF from wrong TSS selector

.gitignore

@@ -2,3 +2,4 @@
 /build
 .idea
 /log
+a.out

src/kernel/arch/x86_64/gdt.rs

@@ -78,7 +78,6 @@ lazy_static! {
         // DO NOT REORDER
         let sel_tss = gdt.append(
             Descriptor::tss_segment(&TSS).set_flags(DescriptorFlags::from_bits_retain(0b1010))
-                .set_access(0b10001011), // This would set the TSS to Busy, but it causes a GPF.
         );
         Selectors {
             sel_kernel_code: sel_k_cs,

src/kernel/arch/x86_64/startup.rs

@@ -2,15 +2,10 @@ use x86_64::{VirtAddr, registers::rflags::RFlags, structures::idt::InterruptStac
 
 use crate::{
     arch::{
-        asm::ltr,
-        x86_64::{
-            gdt::{SELECTORS, dump_gdt},
-            interrupts::IDT,
+        asm::ltr, x86_64::{
+            gdt::SELECTORS, interrupts::IDT,
         },
-    },
-    log::{LOGGER, LogLevel},
-    log_info,
-    memory::alloc::format,
+    }, log::{LOGGER, LogLevel}, log_info, memory::alloc::format,
 };
 
 pub fn init() -> Result<(), ()> {
@@ -27,8 +22,8 @@ pub fn init() -> Result<(), ()> {
         SELECTORS.sel_kernel_stack,
     )
     .expect("Segment order in GDT is bad");
-    dump_gdt();
-    ltr(SELECTORS.sel_tss.index());
+    //ltr(SELECTORS.sel_tss.index()) // THIS WILL CAUSE A GPF, YOU STUPID WHORE
+    ltr(SELECTORS.sel_tss.0);
     Ok(())
 }