Hello,
I was looking into how grub2 works and noticed that in
the load list in grub2/boot/i386/pc/diskboot.S sector
number is 8-byte integer, while
grub2/util/i386/pc/grub-mkimage.c sets the number of
sectors to load at 4-byte offset. Because of this it
actually patches upper part of the sector rather than
number of sectors.
This is the changes I've made:
======================================================
--- grub-mkimage.old Mon May 08 14:29:10 2006
+++ grub-mkimage.c Mon Nov 13 13:41:01 2006
@@ -143,7 +143,7 @@ generate_image (const char *dir,
FILE *o
/* i386 is a little endian architecture. */
*((grub_uint16_t *) (boot_img +
GRUB_DISK_SECTOR_SIZE
- - GRUB_BOOT_MACHINE_LIST_SIZE + 4))
+ - GRUB_BOOT_MACHINE_LIST_SIZE + 8))
= grub_cpu_to_le16 (num);
grub_util_write_image (boot_img, boot_size, out);
======================================================
Sincerely,
Andrey Shuvikov
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