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Fix i386-pc prefix handling with nested partitions (Debian bug

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#585068).  Note that the case where the core image is booted using
multiboot and relocated from its original location still requires
more work.
* kern/i386/pc/init.c (make_install_device): If the prefix starts
with "(,", fill the boot drive in between those two characters, but
expect that a full partition specification including partition map
names will follow.
* util/i386/pc/grub-setup.c (setup): Unless an explicit prefix was
specified, write a prefix without the drive name but including a
full partition specification.
This commit is contained in:
Colin Watson 2010-06-17 12:15:37 +01:00
parent 044e2e60be
commit 2164da6b25
3 changed files with 38 additions and 0 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2010-06-17 Colin Watson <cjwatson@ubuntu.com>
Fix i386-pc prefix handling with nested partitions (Debian bug
#585068). Note that the case where the core image is booted using
multiboot and relocated from its original location still requires
more work.
* kern/i386/pc/init.c (make_install_device): If the prefix starts
with "(,", fill the boot drive in between those two characters, but
expect that a full partition specification including partition map
names will follow.
* util/i386/pc/grub-setup.c (setup): Unless an explicit prefix was
specified, write a prefix without the drive name but including a
full partition specification.
2010-06-16 Colin Watson <cjwatson@ubuntu.com>
* util/grub-mkconfig.in: Ignore non-option arguments, for

8
kern/i386/pc/init.c
View file

@ -83,6 +83,14 @@ make_install_device (void)
grub_snprintf (ptr, sizeof (dev) - (ptr - dev), ")%s", grub_prefix);
grub_strcpy (grub_prefix, dev);
}
else if (grub_prefix[1] == ',' || grub_prefix[1] == ')')
{
/* We have a prefix, but still need to fill in the boot drive. */
grub_snprintf (dev, sizeof (dev),
"(%cd%u%s", (grub_boot_drive & 0x80) ? 'h' : 'f',
grub_boot_drive & 0x7f, grub_prefix + 1);
grub_strcpy (grub_prefix, dev);
}
return grub_prefix;
}

15
util/i386/pc/grub-setup.c
View file

@ -99,6 +99,7 @@ setup (const char *dir,
struct grub_boot_blocklist *first_block, *block;
grub_int32_t *install_dos_part, *install_bsd_part;
grub_int32_t dos_part, bsd_part;
char *prefix;
char *tmp_img;
int i;
grub_disk_addr_t first_sector;
@ -230,6 +231,8 @@ setup (const char *dir,
+ GRUB_KERNEL_MACHINE_INSTALL_DOS_PART);
install_bsd_part = (grub_int32_t *) (core_img + GRUB_DISK_SECTOR_SIZE
+ GRUB_KERNEL_MACHINE_INSTALL_BSD_PART);
prefix = (char *) (core_img + GRUB_DISK_SECTOR_SIZE +
GRUB_KERNEL_MACHINE_PREFIX);
/* Open the root device and the destination device. */
root_dev = grub_device_open (root);
@ -305,6 +308,18 @@ setup (const char *dir,
dos_part = root_dev->disk->partition->number;
bsd_part = -1;
}
if (prefix[0] != '(')
{
char *root_part_name, *new_prefix;
root_part_name =
grub_partition_get_name (root_dev->disk->partition);
new_prefix = xasprintf ("(,%s)%s", root_part_name, prefix);
strcpy (prefix, new_prefix);
free (new_prefix);
free (root_part_name);
}
}
else
dos_part = bsd_part = -1;