Use poweroff driver from libkernaux

src/Makefile

@@ -25,7 +25,6 @@ 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

@@ -1,8 +1,8 @@
 #include "main.h"
 #include "../panic.h"
-#include "../poweroff.h"
 
 #include <kernaux/drivers/console.h>
+#include <kernaux/drivers/shutdown.h>
 
 static const char *const messages[] = {
     "0  #DE - Divide Error Exception",
@@ -42,7 +42,11 @@ static const char *const messages[] = {
 void exception_handler(struct IsrRegisters regs)
 {
     if (regs.int_no > INT_EXCEPTION_LAST) return;
-    if (regs.int_no == POWEROFF_INT && poweroff_doing) return;
+    if (regs.int_no == KERNAUX_DRIVERS_SHUTDOWN_INT &&
+        kernaux_drivers_shutdown_is_doing())
+    {
+        return;
+    }
 
     kernaux_drivers_console_printf(
         "[FAIL] exception: Unhandled protected-mode exception: %s\n",

src/panic.c

@@ -1,14 +1,14 @@
 #include "panic.h"
-#include "poweroff.h"
 
 #include <kernaux/asm/i386.h>
 #include <kernaux/drivers/console.h>
+#include <kernaux/drivers/shutdown.h>
 #include <kernaux/drivers/qemu.h>
 
 void panic(const char *const s)
 {
     kernaux_drivers_console_printf("[FAIL] panic: %s\n", s);
-    poweroff();
+    kernaux_drivers_shutdown_poweroff();
 }
 
 void halt()
@@ -23,5 +23,5 @@ void kernaux_assert_fn(
 ) {
     kernaux_drivers_console_printf("[FAIL] assertion failed: %s:%u: \"%s\"\n",
                                    file, line, str);
-    poweroff();
+    kernaux_drivers_shutdown_poweroff();
 }

src/poweroff.c

@@ -1,14 +0,0 @@
-#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

@@ -1,13 +0,0 @@
-#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