chore: Exceptions are being loaded in other place

Signed-off-by: Redson <redson@riseup.net>

Kernel/Arch/x86_64-pc/Entry/Entry.c

@@ -4,17 +4,12 @@
 #include <LibK/stdio.h>
 #include <Serial/Serial.h>
 #include <System/GDT.h>
-#include <System/Interrupts.h>
 #include <System/PIC.h>
 #include <limine.h>
 #include <meta.h>
 
 extern void far_jump(void);
 
-// The Limine requests can be placed anywhere, but it is important that
-// the compiler does not optimise them away, so, usually, they should
-// be made volatile or equivalent.
-
 static volatile struct limine_framebuffer_request framebuffer_request = {
     .id = LIMINE_FRAMEBUFFER_REQUEST, .revision = 0};
 
@@ -54,20 +49,16 @@ void Arch_entry(void) {
     // IRQ0 starts at 0x20 and IRQ8 starts at 0x28.
     PIC_Initialize(0x20, 0x28);
     kprintf("PIC remapped to 0x20 and 0x28\n");
-    PIC_Mask(ALL);
-
-    Load_Exceptions();
-    kprintf("Exceptions Loaded!\n");
+    PIC_MaskAll();
 
     IDT_Init();
     kprintf("IDT Loaded!\n");
 
     sti();
     kprintf("Interrupts enabled!\n");
 
-    kprintf("Manually raising interrupt 0:\n");
-    asm("int $14");
-
     kprintf("Welcome to BlobOS!\nVersion: %s\n", GIT_VERSION);
+
+    PIC_Unmask(KEYBOARD);
     halt();
 }

Kernel/Arch/x86_64-pc/Include/System/Interrupts.h → Kernel/Arch/x86_64-pc/Include/System/Exceptions.h

@@ -2,7 +2,7 @@
 #include <stdint.h>
 
 __attribute__((packed)) struct interrupt_frame {
-    uint64_t rax, rds, rcx, rsi, rdi, r8, r9, r10, r11, rbp
+    uint64_t rax, rds, rcx, rsi, rdi, r8, r9, r10, r11, rbp;
 };
 
 typedef struct {
@@ -11,6 +11,4 @@ typedef struct {
     uint64_t error;
 } __attribute__((packed)) Registers;
 
-typedef void (*ISRHandler)(Registers *regs);
-
 void Load_Exceptions(void);

Kernel/Arch/x86_64-pc/Include/System/PIC.h

@@ -33,4 +33,5 @@ enum Interrupts {
 void PIC_Initialize(int offset1, int offset2);
 void PIC_SendEOI(unsigned char irq);
 void PIC_Mask(unsigned char IRQline);
+void PIC_MaskAll(void);
 void PIC_Unmask(unsigned char IRQline);

Kernel/Arch/x86_64-pc/System/Interrupts.c → Kernel/Arch/x86_64-pc/System/Exceptions.c

@@ -1,7 +1,9 @@
+#include <IO/Ports.h>
 #include <Kernel/Panic.h>
 #include <LibK/stdio.h>
+#include <System/Exceptions.h>
 #include <System/IDT.h>
-#include <System/Interrupts.h>
+#include <System/PIC.h>
 
 __attribute__((interrupt)) void C_Int_0(struct interrupt_frame *frame) {
     kprintf("Divide By Zero Error #00\n");
@@ -80,6 +82,12 @@ Default_INT_Handler(struct interrupt_frame *frame) {
     kprintf("Unhandled interrupt!\n");
 }
 
+__attribute__((interrupt)) void Keyboard(struct interrupt_frame *frame) {
+    inb(0x60);
+    kprintf("Key pressed");
+    PIC_SendEOI(PIC_REMAP_OFFSET + KEYBOARD);
+}
+
 void Load_Exceptions(void) {
     IDT_Add_Int(0, C_Int_0, IDT_FLAGS_INTERRUPT_GATE);
     IDT_Add_Int(1, C_Int_1, IDT_FLAGS_INTERRUPT_GATE);
@@ -105,4 +113,7 @@ void Load_Exceptions(void) {
     for (uint8_t i = 20; i < 255; i++) {
         IDT_Add_Int(i, Default_INT_Handler, IDT_FLAGS_INTERRUPT_GATE);
     }
+
+    IDT_Add_Int(PIC_REMAP_OFFSET + KEYBOARD, Keyboard,
+                IDT_FLAGS_INTERRUPT_GATE);
 }

Kernel/Arch/x86_64-pc/System/IDT.c

@@ -1,5 +1,6 @@
 #include <Asm/Asm.h>
 #include <Kernel/Panic.h>
+#include <System/Exceptions.h>
 #include <System/IDT.h>
 
 __attribute__((aligned(0x10))) static idt_entry_t idt[256];
@@ -20,5 +21,7 @@ void IDT_Init(void) {
     idtr.base = (uintptr_t)&idt[0];
     idtr.limit = (uint16_t)sizeof(idt_entry_t) * IDT_MAX_DESCRIPTORS - 1;
 
+    Load_Exceptions();
+
     __asm__ volatile("lidt %0" : : "m"(idtr)); // load the new IDT
 }

Kernel/Arch/x86_64-pc/System/PIC.c

@@ -87,3 +87,8 @@ void PIC_SendEOI(unsigned char irq) {
         outb(PIC2_COMMAND, PIC_EOI);
     outb(PIC1_COMMAND, PIC_EOI);
 }
+
+void PIC_MaskAll(void) {
+    outb(PIC2_DATA, ALL);
+    outb(PIC2_DATA, ALL);
+}

Meta/run.sh

@@ -21,4 +21,5 @@ fi
 	qemu-system-x86_64 -cdrom build/BlobOS.iso\
         -serial stdio\
         -enable-kvm\
-        -boot dc
+        -boot dc\
+	-d int