Bug 158358

Summary:

[loader] [patch] allow /boot/loader to work from an MBR extended partition

Product:

Base System

Reporter:

Gyrd Thane Lange <gyrd-se>

Component:

kern

Assignee:

Andrey V. Elsukov <ae>

Status:

Closed FIXED

Severity:

Affects Only Me

Priority:

Normal

Version:

9.0-CURRENT

Hardware:

Any

OS:

Any

Attachments:

Description	Flags
file.diff	none

Description Gyrd Thane Lange 2011-06-28 02:00:20 UTC

http://parvati.thanelange.no/freebsd/boot_loader/

The FreeBSD loader has since a very long time ago attempted to work
with MBR extended partitions but a simple logical error has prevented
it from succeeding:

How it is supposed to work.

-----
| 1 |
-----
| 2 | --
-----   |
        |
        |
        |
----- <-
| 5 |
-----
|   | --
-----   |
        |
        |
        |
----- <-
| 6 |
-----
|   |
-----


How /boot/loader (incorrectly) works.

-----
| 1 |
-----
| 2 | --
-----   |
        |
        |
        |
----- <-
| 5 |
-----
| 6 | --
-----   |
        |
        |
        |
----- <-
| 7 |
-----
| 8 |
-----

Fix: Using the attached patch:
patch -d /usr/src/sys/boot/i386/libi386/ < boot_loader.diff

Patch is also found here:
http://parvati.thanelange.no/freebsd/boot_loader/boot_loader.diff


Patch attached with submission follows:
How-To-Repeat: Install FreeBSD in an MBR extended partition. (It is easily doable using command line tools.)

Attempt to boot.

Observe that the /boot/loader does not find the desired partition.

Comment 1 Andrey V. Elsukov freebsd_committer

2012-08-06 09:55:30 UTC

State Changed
From-To: open->patched

This issue fixed in head/ after r239088.

Comment 2 Andrey V. Elsukov freebsd_committer

2012-10-17 16:31:57 UTC

Responsible Changed
From-To: freebsd-bugs->ae

Take.

Comment 3 Andrey V. Elsukov freebsd_committer

2012-11-19 13:08:43 UTC

State Changed
From-To: patched->closed

Fixed in r243243. Thanks!