GNU Info

(multiboot.info)Header layout

---

Next: Header magic fields Prev: OS image format Up: OS image format

---

Enter node , (file) or (file)node

The layout of Multiboot header
------------------------------

   The layout of the Multiboot header must be as follows:

Offset  Type    Field Name     Note
0       u32     magic          required
4       u32     flags          required
8       u32     checksum       required
12      u32     header_addr    if flags[16] is set
16      u32     load_addr      if flags[16] is set
20      u32     load_end_addr  if flags[16] is set
24      u32     bss_end_addr   if flags[16] is set
28      u32     entry_addr     if flags[16] is set
32      u32     mode_type      if flags[2] is set
36      u32     width          if flags[2] is set
40      u32     height         if flags[2] is set
44      u32     depth          if flags[2] is set

   The fields `magic', `flags' and `checksum' are defined in Note:
Header magic fields, the fields `header_addr', `load_addr',
`load_end_addr', `bss_end_addr' and `entry_addr' are defined in Note:
Header address fields, and the fields `mode_type', `width', `height'
and `depth' are defind in Note: Header graphics fields.