wip: use multiboot2

src/boot.s

@@ -1,16 +1,27 @@
 # Declare constants for the multiboot header.
 .set ALIGN,    1<<0             # align loaded modules on page boundaries
 .set MEMINFO,  1<<1             # provide memory map
-.set FLAGS,    ALIGN | MEMINFO  # this is the Multiboot 'flag' field
-.set MAGIC,    0x1BADB002       # 'magic number' lets bootloader find the header
-.set CHECKSUM, -(MAGIC + FLAGS) # checksum of above, to prove we are multiboot
+.set MAGIC,    0xE85250D6       # 'magic number' lets bootloader find the header
+.set ARCHITECTURE, 0
 
 # Declare a multiboot header that marks the program as a kernel.
 .section .multiboot.data, "aw"
-.align 4
-.long MAGIC
-.long FLAGS
-.long CHECKSUM
+header_start:
+	# HEADER
+	.long MAGIC
+	.long ARCHITECTURE
+	.long header_end - header_start
+	.long 0x100000000 - (MAGIC + (header_end - header_start))
+
+	#TAGS:
+
+
+	# END TAG
+	.align 8
+	.int 0		# type
+	.int 0		# flag
+	.long 8		# size
+header_end:
 
 # Allocate the initial stack.
 .section .bootstrap_stack, "aw", @nobits