After commit 968de4f ("i386: Relocatable kernel support") IMAGE_OFFSET wasn't
actually used anymore in the (current) X86 build system. Now remove its last
traces.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Impact: segfault on build of a 32-bit relocatable kernel
When converting arch/x86/boot/compressed/relocs.c to support unlimited
sections, the computation of sym_strtab in walk_relocs() was done
incorrectly. This causes a segfault for some people when building the
relocatable 32-bit kernel.
Pointed out by Anonymous <pageexec@freemail.hu>.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Some BIOSes do not indicate error when trying to read from non-
existing device. Zero buffer before reading and check that we
possibly have valid MBR by looking for MBR magic.
This was fixed in different way for edd.S in
http://marc.info/?l=linux-kernel&m=114087765422490&w=2, but lost
again when edd.S was rewritten in C.
Signed-off-by: Andrey Borzenkov < arvidjaar@mail.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Checkin e38e05a858 added a 9th CPU flag
word, but didn't adjust the boot code to match. This patch adds the
necessary boot code support.
Note: due to a typo in an #if statement, it didn't trigger the #error
this was supposed to do.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Impact: None (cleanup)
SWAP_DEV is unused since 2.6.23-rc1. The comment was already incorrect
since (at least) 2.6.12.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
> This is regression but old enough. Apparently I had for whatever reasons
> EDD turned off till recently. This is 2.6.27-rc5 just in case.
>
> In 2006 I fixed ghost devices due to buggy BIOS:
>
> http://marc.info/?l=linux-kernel&m=114087765422490&w=2
>
> Later edd.S has been rewritten in C, and apparently this patch has been
> lost:
>
> {pts/1}% ls /sys/firmware/edd
> int13_dev80/ int13_dev84/ int13_dev88/ int13_dev8c/
> int13_dev81/ int13_dev85/ int13_dev89/ int13_dev8d/
> int13_dev82/ int13_dev86/ int13_dev8a/ int13_dev8e/
> int13_dev83/ int13_dev87/ int13_dev8b/ int13_dev8f/
>
> But I have just a single disk. This is the same system BTW.
Some BIOSes do not always set CF on error before return from int13.
The patch adds additional check for status being zero (AH == 0).
This was fixed for edd.S in
http://marc.info/?l=linux-kernel&m=114087765422490&w=2, but lost
again when edd.S was rewritten in C.
Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
When building image.iso (make isoimage), use the isohybrid tool if it
exists. isohybrid is a script included with Syslinux 3.72 and higher,
which creates an image that can be booted either as a hard disk
(including removable, e.g. USB disk) or as a CD-ROM.
If isohybrid doesn't exist, then this has no effect.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The CPU feature detection code in the boot code is somewhat minimal,
and doesn't include all possible CPUID words. In particular, it
doesn't contain the code for CPU feature words 2 (Transmeta),
3 (Linux-specific), 5 (VIA), or 7 (scattered). Zero them out, so we
can still set those bits as known at compile time; in particular, this
allows creating a Linux-specific NOPL flag and have it required (and
therefore resolvable at compile time) in 64-bit mode.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The Kbuild variable "targets" is supposed to be
configuration-independent and reflect "all possible targets". This is
required to make "make clean" work properly.
Therefore, move all manipulation of "targets" as well as custom rules
out of the x86-32 ifdef statement. Only leave inside the ifdefs the
things that are genuinely configuration-dependent.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
We have had a number of cases where <asm/cpufeature.h> (and its
predecessors) have diverged substantially from the names list in
/proc/cpuinfo. This patch generates the latter from the former.
It retains the option for explicitly overriding the strings, but by
making that require a separate action it should at least be less
likely to happen.
It would be good to do a future pass and rename strings that are
gratuituously different in the kernel (/proc/cpuinfo is a userspace
interface and must remain constant.)
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The CPU feature detection code in the boot code is somewhat minimal,
and doesn't include all possible CPUID words. In particular, it
doesn't contain the code for CPU feature words 2 (Transmeta),
3 (Linux-specific), 5 (VIA), or 7 (scattered). Zero them out, so we
can still set those bits as known at compile time; in particular, this
allows creating a Linux-specific NOPL flag and have it required (and
therefore resolvable at compile time) in 64-bit mode.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This recent patch
commit c3965bd151
Author: Paul Jackson <pj@sgi.com>
Date: Wed May 14 08:15:34 2008 -0700
x86 boot: proper use of ARRAY_SIZE instead of repeated E820MAX constant
caused these new warnings during a normal build:
In file included from linux-2.6/arch/x86/boot/memory.c:17:
linux-2.6/include/linux/log2.h: In function '__ilog2_u32':
linux-2.6/include/linux/log2.h:34: warning: implicit declaration of function 'fls'
linux-2.6/include/linux/log2.h: In function '__ilog2_u64':
linux-2.6/include/linux/log2.h:42: warning: implicit declaration of function 'fls64'
linux-2.6/include/linux/log2.h: In function '__roundup_pow_of_two ':
linux-2.6/include/linux/log2.h:63: warning: implicit declaration of function 'fls_long'
I tried to fix them in log2.h, but it's difficult because the real mode
environment is completely different from a normal kernel environment. Instead
define an own ARRAY_SIZE macro in boot.h, similar to the other private
macros there.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Clean up the code for crashes during SpeedStep probing on older
machines.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar
Michal Januszewski
Paul Bolle
H. Peter Anvin
Andrey Borzenkov
Andi Kleen
Paolo Ciarrocchi