Kernel: Demo the initrd using TarStream

Yes, we're using the physical address. Not optimal, this is only for demo purposes.

kernel/src/main.cpp

@@ -4,14 +4,18 @@
 #include "arch/Serial.h"
 #include "arch/Timer.h"
 #include "boot/Init.h"
+#include "boot/bootboot.h"
 #include "config.h"
 #include "memory/Heap.h"
 #include "memory/KernelVM.h"
 #include "memory/MemoryManager.h"
 #include "thread/Scheduler.h"
 #include <luna/Result.h>
+#include <luna/TarStream.h>
 #include <luna/Units.h>
 
+extern const BOOTBOOT bootboot;
+
 void async_thread()
 {
     while (true)
@@ -49,6 +53,15 @@ Result<void> init()
     kinfoln("Used memory:     %s", to_dynamic_unit(MemoryManager::used()).release_value().chars());
     kinfoln("Reserved memory: %s", to_dynamic_unit(MemoryManager::reserved()).release_value().chars());
 
+    TarStream stream((void*)bootboot.initrd_ptr, bootboot.initrd_size);
+    TarStream::Entry entry;
+    while (TRY(stream.read_next_entry().try_set_value_with_specific_error(entry, 0)))
+    {
+        if (entry.type == TarStream::EntryType::RegularFile)
+            kinfoln("Found file %s in initial ramdisk, of size %s", entry.name,
+                    to_dynamic_unit(entry.size).release_value().chars());
+    }
+
     Thread::init();
     Scheduler::init();