Rewrite poweroff

src/Makefile

@@ -25,6 +25,7 @@ CPPFLAGS = \
 # Architecture-dependent
 OBJS = start.s.o
 OBJS += main.c.o
+OBJS += poweroff.c.o
 OBJS += panic.c.o
 OBJS += paging.c.o
 

src/interrupts/exception.c

@@ -1,5 +1,6 @@
 #include "main.h"
 #include "../panic.h"
+#include "../poweroff.h"
 
 #include <kernaux/drivers/console.h>
 
@@ -40,11 +41,13 @@ static const char *const messages[] = {
 
 void exception_handler(struct IsrRegisters regs)
 {
-    if (regs.int_no > INT_EXCEPTION_LAST) {
-        return;
-    }
+    if (regs.int_no > INT_EXCEPTION_LAST) return;
+    if (regs.int_no == POWEROFF_INT && poweroff_doing) return;
 
-    kernaux_drivers_console_printf("[FAIL] exception: Unhandled protected-mode exception: %s\n", messages[regs.int_no]);
+    kernaux_drivers_console_printf(
+        "[FAIL] exception: Unhandled protected-mode exception: %s\n",
+        messages[regs.int_no]
+    );
 
     panic("Can not continue.");
 }

src/panic.c

@@ -1,12 +1,9 @@
 #include "panic.h"
+#include "poweroff.h"
 
 #include <kernaux/asm/i386.h>
 #include <kernaux/drivers/console.h>
-
-static void poweroff()
-{
-    kernaux_asm_x86_outportw(0x604, 0x2000);
-}
+#include <kernaux/drivers/qemu.h>
 
 void panic(const char *const s)
 {

src/poweroff.c

@@ -0,0 +1,14 @@
+#include "poweroff.h"
+
+#include <stdbool.h>
+
+#include <kernaux/drivers/qemu.h>
+
+bool poweroff_doing = false;
+
+void poweroff()
+{
+    poweroff_doing = true;
+    kernaux_drivers_qemu_poweroff();
+    for (;;) asm volatile(POWEROFF_ASM);
+}

src/poweroff.h

@@ -0,0 +1,13 @@
+#ifndef KERNEL_INCLUDED_POWEROFF
+#define KERNEL_INCLUDED_POWEROFF 1
+
+#include <stdbool.h>
+
+#define POWEROFF_INT 3
+#define POWEROFF_ASM "int $3"
+
+extern bool poweroff_doing;
+
+void poweroff();
+
+#endif