libburnia/libisofs
2
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Mentioned boot image address in newer GRUB2 MBR

Browse Source
This commit is contained in:
Thomas Schmitt 2013-11-18 13:22:17 +01:00
parent 6baeae70e0
commit 654ff82345
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
doc/boot_sectors.txt
View File

@ -1351,12 +1351,21 @@ Sources:
Mailing list conversations with Vladimir Serbinenko. Mailing list conversations with Vladimir Serbinenko.
The MBR file that is used with GRUB2 script grub-mkrescue needs only a The MBR file that is used with older versions of GRUB2 script grub-mkrescue
partition table entry which describes the image size. needs only a partition table entry which describes the image size.
Newer versions get patched by the block address of the content of the first
El Torito boot image. See grub-mkrescue use of xorrisofs option --grub2-mbr.
Byte Range | Value | Meaning Byte Range | Value | Meaning
---------- | ---------- | ---------------------------------------------------- ---------- | ---------- | ----------------------------------------------------
0 - 445 | = opaque = | GRUB2 machine code provided by MBR template 0 - 431 | = opaque = | GRUB2 machine code provided by MBR template
| |
432 - 439 | bootimg_adr| With newer versions of grub-mkrescue:
| | Block address of the start of the boot image file
| | content plus 4. Block size is 512.
| | 64 bit Little-endian.
| |
440 - 445 | = opaque = | provided by MBR template
| | | |
446 - 509 | ========== | Partition table 446 - 509 | ========== | Partition table
| | | |