/* boot.S - bootstrap the kernel */
 
 #define ASM     1
 #include "multiboot.h"
 
         .text
 
         /* Align 32 bits boundary. */
         .align  4
 
         /* Multiboot header. */
 multiboot_header:
         /* magic */
         .long   MULTIBOOT_HEADER_MAGIC
         /* flags */
         .long   MULTIBOOT_HEADER_FLAGS
         /* checksum */
         .long   -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
         /* 
         .space 20
         .long 0
         .long 100
         .long 30
         .long 16
         */
 
         .globl  start, _start
 start:
 _start:
         /* Initialize the stack pointer. */
         //movl    $(stack + STACK_SIZE), %esp
         /* Place the stack from 0, since the lower memory is unused */
         movl   $STACK_SIZE, %esp
 
         /* Reset EFLAGS. */
         pushl   $0
         popf
 
         /* Push the pointer to the Multiboot information structure. */
         pushl   %ebx
         /* Push the magic value. */
         pushl   %eax
 
         /* Now enter the C main function... */
         call    main
 
         /* Halt. */
         pushl   $halt_message
         call    printf
 
         hlt
         /* Not going to be executed. */
         pushl   $halt_message
         call    printf
 
 halt_message:
         .asciz  "Halted."
 
        /* Our stack area. In BSS
         .comm   stack, STACK_SIZE
        */