Add/move code into kutil library

src/kernel/assert.cpp

@@ -0,0 +1,29 @@
+#include "assert.h"
+#include "console.h"
+
+[[noreturn]] void
+__kernel_assert(const char *file, unsigned line, const char *message)
+{
+	console *cons = console::get();
+	if (cons) {
+		cons->set_color(9 , 0);
+		cons->puts("\n\n  ERROR: ");
+		cons->puts(file);
+		cons->puts(":");
+		cons->put_dec(line);
+		cons->puts(":  ");
+		cons->puts(message);
+	}
+
+	__asm__ __volatile__( 
+		"movq %0, %%r8;"
+		"movq %1, %%r9;"
+		"movq %2, %%r10;"
+		"movq $0, %%rdx;"
+		"divq %%rdx;"
+		: // no outputs
+		: "r"((uint64_t)line), "r"(file), "r"(message)
+		: "rax", "rdx", "r8", "r9", "r10");
+
+	while (1);
+}