grub – BAFM

Well, as I mentioned in my earlier post, I had some trouble during the week. I was having issues with SLES10 installations not finishing during the bootloader installation phase. After trying out different flavors (as in 10SP2 x64/x86, …), and not having any luck with this, I went searching on Google as a last effort try. Guess what, yet again Google helped me out!

It was pretty simple. Putting /dev/cciss/c0d0 into /boot/grub/device.map as (hd0) made the grub-installer finish. Now, figuring out how to transfer those information during the installation proved difficult. I was just about to give up, while reading through the AutoYAST documentation, when it struck me. There is even an extra chapter for this stuff, so simply putting the following into my profile solved my issues:

	&lt;bootloader&gt;
		&lt;device_map config:type="list"&gt;
			&lt;device_map_entry&gt;
				&lt;firmware&gt;hd0&lt;/firmware&gt;
				&lt;linux&gt;/dev/cciss/c0d0&lt;/linux&gt;
			&lt;/device_map_entry&gt;
		&lt;/device_map&gt;
	&lt;/bootloader&gt;

<device_map config:type="list">

<device_map_entry>

<linux>/dev/cciss/c0d0</linux>

</device_map_entry>

</device_map>

</bootloader>

OK, as some of you have noticed; I prepared my box for the new toolchain, recompiled the stuff Kevin mentioned in the exact same order wrote down in his README, and it looks like it actually works with all my stuff I have on my box; except sys-libs/grub! *sigh*

Apparently, grub segfaults at boot and/or while running it from the chroot in the exact same spot, the new QA warnings complain about ..

* QA Notice: Package has poor programming practices which may compile
*            fine but exhibit random runtime failures.
* char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:222: warning: dereferencing type-punned pointer will break strict-aliasing rules
builtins.c:4862: warning: dereferencing type-punned pointer will break strict-aliasing rules
disk_io.c:1027: warning: dereferencing type-punned pointer will break strict-aliasing rules
disk_io.c:1057: warning: dereferencing type-punned pointer will break strict-aliasing rules
tparm.c:719: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:222: warning: dereferencing type-punned pointer will break strict-aliasing rules
builtins.c:4862: warning: dereferencing type-punned pointer will break strict-aliasing rules
disk_io.c:1027: warning: dereferencing type-punned pointer will break strict-aliasing rules
disk_io.c:1057: warning: dereferencing type-punned pointer will break strict-aliasing rules
tparm.c:719: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules
char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules

* QA Notice: Package has poor programming practices which may compile

* fine but exhibit random runtime failures.

* char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules

char_io.c:222: warning: dereferencing type-punned pointer will break strict-aliasing rules

builtins.c:4862: warning: dereferencing type-punned pointer will break strict-aliasing rules

disk_io.c:1027: warning: dereferencing type-punned pointer will break strict-aliasing rules

disk_io.c:1057: warning: dereferencing type-punned pointer will break strict-aliasing rules

tparm.c:719: warning: dereferencing type-punned pointer will break strict-aliasing rules

char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules

char_io.c:222: warning: dereferencing type-punned pointer will break strict-aliasing rules

builtins.c:4862: warning: dereferencing type-punned pointer will break strict-aliasing rules

disk_io.c:1027: warning: dereferencing type-punned pointer will break strict-aliasing rules

disk_io.c:1057: warning: dereferencing type-punned pointer will break strict-aliasing rules

tparm.c:719: warning: dereferencing type-punned pointer will break strict-aliasing rules

char_io.c:181: warning: dereferencing type-punned pointer will break strict-aliasing rules

So, I unpacked the libc and grub debug files, to get a clue where it’s failing and fed the program execution into gdb and viola:

GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db library "/lib/tls/libthread_db.so.1".
(gdb) run
Starting program: /sbin/grub --no-floppy

Program received signal SIGSEGV, Segmentation fault.
grub_putstr (str=0xa1660489) at char_io.c:174
in char_io.c
(gdb) quit
The program is running.  Exit anyway? (y or n)

GNU gdb 6.3

GDB is free software, covered by the GNU General Public License, and you are

welcome to change it and/or distribute copies of it under certain conditions.

Type "show copying" to see the conditions.

There is absolutely no warranty for GDB. Type "show warranty" for details.

This GDB was configured as "i686-pc-linux-gnu"...Using host libthread_db library "/lib/tls/libthread_db.so.1".

(gdb) run

Starting program: /sbin/grub --no-floppy

Program received signal SIGSEGV, Segmentation fault.

grub_putstr (str=0xa1660489) at char_io.c:174

in char_io.c

(gdb) quit

The program is running. Exit anyway? (y or n)

I’m not yet sure if it really is the same spot, but I’ll let Kevin have a shot at it …

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Tag: grub

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grub via serial console

Gentoo/hardened and the new toolchain