Implemented a proper libk

libk/interrupt/exceptions.c

@@ -0,0 +1,48 @@
+#include <interrupt/exceptions.h>
+#include <interrupt/idt.h>
+#include <stdio.h>
+
+// Exception handlers
+__attribute__ ((interrupt))
+void excp_divideErr(intFrame_t* iframe) { // ISR 0
+    printf("\x1b[1M[ Division Error ]\n\x1b[8M");
+    iframe->eip++;
+}
+
+__attribute__ ((interrupt))
+void excp_doubleFault(intFrame_t* iframe, uint32_t errCode) { // ISR 8
+    printf("\x1b[1M[ Double Fault ]\n\x1b[8M"); // Error code should be 0 (TODO: Maybe check if it's != 0?)
+    __asm__ volatile ("cli; hlt");
+}
+
+__attribute__ ((interrupt))
+void excp_pageFault(intFrame_t* iframe, uint32_t errCode) { // ISR 14
+    uint32_t badAddress = 0;
+
+    // cr2 should contain invalid address
+    __asm__ volatile("movl %%cr2, %0" : "=r"(badAddress));
+
+    printf("\x1b[1M[ Page Fault : 0x%x ] - Tried to access 0x%x.\n\x1b[8M", errCode, badAddress);
+    __asm__ volatile ("cli; hlt");
+}
+
+__attribute__ ((interrupt))
+void excp_reserved(intFrame_t* iframe) { // ISR 15
+    print("\x1b[1M[ Unknown Exception ]\n\x1b[8M");
+    __asm__ volatile ("cli; hlt");
+}
+
+// TODO: Add more (because there's always more)
+
+// Repetative isr definitions
+void setupExceptions() {
+    for (uint8_t i = 0; i < 32; i++) {
+        idtSetGate(i, excp_reserved, TRAP_GATE_FLAGS); // Doesn't account for err codes, will just halt anyways
+    }
+
+    idtSetGate(0,  excp_divideErr, TRAP_GATE_FLAGS);
+    idtSetGate(8,  excp_doubleFault, TRAP_GATE_FLAGS);
+    idtSetGate(14, excp_pageFault, TRAP_GATE_FLAGS);
+    idtSetGate(15, excp_reserved, TRAP_GATE_FLAGS);
+}
+