fix: no more random reboot

headers/interrupts.h

@@ -1,3 +1,6 @@
 #pragma once
 
+#include <stdint.h>
+
 void exception_handler(void);
+void pic_send_eoi(uint8_t irq);

src/interrupt/handler.c

@@ -4,6 +4,7 @@
 #include "utils.h"
 
 #include <stdint.h>
+#define NTMFDP 0
 
 const char *faults[] = {
     "division by zero",
@@ -46,3 +47,12 @@ void exception_handler(void)
 	}
 	kprintf(KERN_ERR "interrupt triggered with no matching code\n");
 }
+
+void irq_handler(void)
+{
+	int8_t index = -1;
+	__asm__ volatile("movb %%bl, %0" ::"m"(index));
+
+	pic_send_eoi(NTMFDP);
+	kpanic("cramptés\n");
+}

src/interrupt/idt.c

@@ -14,10 +14,13 @@
 #define PIC2_DATA    (PIC2 + 1)
 
 extern void *isr_stub_table[];
+extern void *irq_stub_table[];
 
 __attribute__((aligned(0x10))) static struct idt_entry idt_entries[IDT_SIZE];
 static struct idt_descriptor idtr;
 
+void load_idt(struct idt_descriptor *idtr);
+
 void idt_set_descriptor(uint8_t index, void *isr, uint8_t flags)
 {
 	struct idt_entry *descriptor = &idt_entries[index];
@@ -36,8 +39,9 @@ void init_idt(void)
 
 	for (uint8_t i = 0; i < 32; i++)
 		idt_set_descriptor(i, isr_stub_table[i], 0x8E);
-	__asm__ volatile("lidt %0" : : "m"(idtr));
-	__asm__ volatile("sti");
+	for (uint8_t i = 32; i < 48; i++)
+		idt_set_descriptor(i, irq_stub_table[i], 0x8E);
+	load_idt(&idtr);
 	// https://wiki.osdev.org/8259_PIC#Programming_with_the_8259_PIC
 	pic_remap(0x20, 0x28);
 	pic_disable();

src/interrupt/irq.s

@@ -0,0 +1,45 @@
+.intel_syntax noprefix
+.extern irq_handler
+
+.macro irq_common_stub nb
+irq_stub_\nb:
+	mov bl, \nb
+	call irq_handler
+	iret 
+.endm
+
+irq_common_stub 0
+irq_common_stub 1
+irq_common_stub 2
+irq_common_stub 3
+irq_common_stub 4
+irq_common_stub 5
+irq_common_stub 6
+irq_common_stub 7
+irq_common_stub 8
+irq_common_stub 9
+irq_common_stub 10
+irq_common_stub 11
+irq_common_stub 12
+irq_common_stub 13
+irq_common_stub 14
+irq_common_stub 15
+
+.global irq_stub_table
+irq_stub_table:
+	.long irq_stub_0
+	.long irq_stub_1
+	.long irq_stub_2
+	.long irq_stub_3
+	.long irq_stub_4
+	.long irq_stub_5
+	.long irq_stub_6
+	.long irq_stub_7
+	.long irq_stub_8
+	.long irq_stub_9
+	.long irq_stub_10
+	.long irq_stub_11
+	.long irq_stub_12
+	.long irq_stub_13
+	.long irq_stub_14
+	.long irq_stub_15

src/interrupt/load_idt.s

@@ -0,0 +1,11 @@
+.intel_syntax noprefix
+
+.global load_idt
+load_idt:
+push ebp
+mov ebp, esp
+mov eax, [ebp + 8]
+lidt [eax]
+mov esp, ebp
+pop ebp
+ret

src/interrupt/pic.c

@@ -20,6 +20,8 @@
 #define ICW4_BUF_MASTER 0x0C /* Buffered mode/master */
 #define ICW4_SFNM       0x10 /* Special fully nested (not) */
 
+#define PIC_EOI 0x20 /* End-of-interrupt command code */
+
 void pic_remap(int offset_master, int offset_slave)
 {
 	uint8_t a1, a2;
@@ -59,3 +61,10 @@ void pic_disable(void)
 	outb(PIC1_DATA, 0xff);
 	outb(PIC2_DATA, 0xff);
 }
+
+void pic_send_eoi(uint8_t irq)
+{
+	if (irq >= 8)
+		outb(PIC2_COMMAND, PIC_EOI);
+	outb(PIC1_COMMAND, PIC_EOI);
+}

src/kernel.c

@@ -1,11 +1,9 @@
-#include "alloc.h"
 #include "gdt.h"
 #include "idt.h"
-#include "kpanic.h"
 #include "kprintf.h"
 #include "memory.h"
+#include "power.h"
 #include "shell.h"
-#include "string.h"
 #include "terminal.h"
 
 #include <stdbool.h>