"Int 6: CR2" on bootup w/ 2.6.18-rc7-mm1

"Int 6: CR2" on bootup w/ 2.6.18-rc7-mm1

[Bernhard Rosenkraenzer]

This happens when trying to boot 2.6.18-rc7-mm1 on a truly ancient (Pentium 1) 
box:

Uncompressing Linux... Ok, booting the kernel.

Int 6: CR2 00000000 err 00000000 EIP c0381719 CS 00000060 flags 00010046
Stack: 00000000 c036f4d1 00000000 c0100199 000001b8 0505c600 00c036cc 001f0fc3

(No further details even with initcall_debug loglevel=7).
c0381719 appears to be in ACPI code -- but the Int 6 error happens even with 
acpi=off.

Re: "Int 6: CR2" on bootup w/ 2.6.18-rc7-mm1

[Andrew Morton]

On Thu, 21 Sep 2006 14:12:08 +0200
Bernhard Rosenkraenzer <bero@arklinux.org> wrote:

> This happens when trying to boot 2.6.18-rc7-mm1 on a truly ancient (Pentium 1) 
> box:
> 
> Uncompressing Linux... Ok, booting the kernel.
> 
> Int 6: CR2 00000000 err 00000000 EIP c0381719 CS 00000060 flags 00010046
> Stack: 00000000 c036f4d1 00000000 c0100199 000001b8 0505c600 00c036cc 001f0fc3
> 
> (No further details even with initcall_debug loglevel=7).
> c0381719 appears to be in ACPI code -- but the Int 6 error happens even with 
> acpi=off.

Well Chuck's new early-fault handler has gone and handled an early fault.

I assume that machine runs 2.6.18 OK with the same .config?

Re: "Int 6: CR2" on bootup w/ 2.6.18-rc7-mm1

[linux-os (Dick Johnson)]

On Thu, 21 Sep 2006, Andrew Morton wrote:

> On Thu, 21 Sep 2006 14:12:08 +0200
> Bernhard Rosenkraenzer <bero@arklinux.org> wrote:
>
>> This happens when trying to boot 2.6.18-rc7-mm1 on a truly ancient
>> (Pentium 1)
>> box:
>>
>> Uncompressing Linux... Ok, booting the kernel.
>>
>> Int 6: CR2 00000000 err 00000000 EIP c0381719 CS 00000060 flags 00010046
>> Stack: 00000000 c036f4d1 00000000 c0100199 000001b8 0505c600 00c036cc
> 001f0fc3
>>
>> (No further details even with initcall_debug loglevel=7).
>> c0381719 appears to be in ACPI code -- but the Int 6 error happens even with
>> acpi=off.
>
> Well Chuck's new early-fault handler has gone and handled an early fault.
>
> I assume that machine runs 2.6.18 OK with the same .config?
> -

Interrupt 6 is an invalid opcode interrupt. The caller might check
the kind of CPU for which the kernel was compiled. You can't boot
a '486 with '686 opcodes. "Truly ancient" probably explains it all.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.66 BogoMips).
New book: http://www.AbominableFirebug.com/
_
\x1a\x04

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Re: "Int 6: CR2" on bootup w/ 2.6.18-rc7-mm1

[Andi Kleen]

On Thu, Sep 21, 2006 at 12:43:36PM -0700, Andrew Morton wrote:
> On Thu, 21 Sep 2006 14:12:08 +0200
> Bernhard Rosenkraenzer <bero@arklinux.org> wrote:
> 
> > This happens when trying to boot 2.6.18-rc7-mm1 on a truly ancient (Pentium 1) 
> > box:
> > 
> > Uncompressing Linux... Ok, booting the kernel.
> > 
> > Int 6: CR2 00000000 err 00000000 EIP c0381719 CS 00000060 flags 00010046
> > Stack: 00000000 c036f4d1 00000000 c0100199 000001b8 0505c600 00c036cc 001f0fc3
> > 
> > (No further details even with initcall_debug loglevel=7).
> > c0381719 appears to be in ACPI code -- but the Int 6 error happens even with 
> > acpi=off.
> 
> Well Chuck's new early-fault handler has gone and handled an early fault.
> 
> I assume that machine runs 2.6.18 OK with the same .config?

Int 6 is invalid op. Can you do 

gdb vmlinux
disassemble 0x<number behind EIP>?

and send the full output?

-Andi