linux-kernel - Re: Bug on 2.6.26 - x86 VIA Nehemiah CentaurHauls processor cannot boot

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Message-ID: <43e72e890807210701w6d7f5638w5fdbea76a1cf1c0b@mail.gmail.com>
Date:	Mon, 21 Jul 2008 07:01:19 -0700
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"linux kernel" <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...nel.org>,
	"Ivan Seskar" <Seskar@...lab.rutgers.edu>,
	jfm3 <jfm3@...lab.rutgers.edu>, Sujith <m.sujith@...il.com>
Subject: Re: Bug on 2.6.26 - x86 VIA Nehemiah CentaurHauls processor cannot boot

On Mon, Jul 21, 2008 at 6:23 AM, H. Peter Anvin <hpa@...or.com> wrote:
> Luis R. Rodriguez wrote:
>>
>> This bug seems to be present since 2.6.22 [1], so hope we can get this
>> fixed ASAP. Let me know if you have patch suggestions I can test.
>>
>> This crashes very early, I had to use earlyprintk to get it.
>>
>> BUG: Int 6: CR2 00000000
>>     EDI 00000000  ESI 0009f000  EBP 00000000  ESP c036ff60
>>     EBX c03e6070  EDX 00000006  ECX 0000009f  EAX c034d240
>>     err 00000000  EIP c0387ac2   CS 00000060  flg 00010016
>> Stack: 00000000 00000000 c03b63d8 c037bb11 0001dff0 00003c00 c0399614
>> c03b6304
>>       00822007 c037aeb4 c0304134 000001df c0304117 00000000 30303030
>> 205d3030
>>       00000000 c034c794 00000000 00000000 00822007 c02b921f c034c794
>> 00000000
>> [    0.000000] Pid: 0, comm: swapper Not tainted 2.6.26 #1
>
> Use objdump -d or something to find out what is at 0xc0387ac2

I've put extra spaces between the culprit.

c0387aa0 <free_bootmem>:
c0387aa0:       57                      push   %edi
c0387aa1:       89 c7                   mov    %eax,%edi
c0387aa3:       a1 40 d2 34 c0          mov    0xc034d240,%eax
c0387aa8:       56                      push   %esi
c0387aa9:       89 d6                   mov    %edx,%esi
c0387aab:       53                      push   %ebx
c0387aac:       eb 0e                   jmp    c0387abc <free_bootmem+0x1c>
c0387aae:       89 d8                   mov    %ebx,%eax
c0387ab0:       89 f1                   mov    %esi,%ecx
c0387ab2:       89 fa                   mov    %edi,%edx
c0387ab4:       e8 67 ff ff ff          call   c0387a20 <free_bootmem_core>
c0387ab9:       8b 43 18                mov    0x18(%ebx),%eax
c0387abc:       8d 58 e8                lea    -0x18(%eax),%ebx
c0387abf:       8b 43 18                mov    0x18(%ebx),%eax

c0387ac2:       0f 1f 40 00             nopl   0x0(%eax)

c0387ac6:       81 fb 28 d2 34 c0       cmp    $0xc034d228,%ebx
c0387acc:       75 e0                   jne    c0387aae <free_bootmem+0xe>
c0387ace:       5b                      pop    %ebx
c0387acf:       5e                      pop    %esi
c0387ad0:       5f                      pop    %edi
c0387ad1:       c3                      ret

  Luis
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