linux-kernel - Re: powerpc 476, Little-endian, pte fault

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <CAJw04pC6ZPpO8xvybjLH0ya9eKBKAkpf8N3gDTMpFnpTuhJs2A@mail.gmail.com>
Date:	Mon, 31 Oct 2011 13:08:09 +0530
From:	Santosh Kumar <santoshkumar.a@...il.com>
To:	Michael Neuling <mikey@...ling.org>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Tony Breeds <tony@...eyournoodle.com>
Subject: Re: powerpc 476, Little-endian, pte fault

This is not the first user-space instruction. While executing this
process kernel has added two TLB entries with TID(process id) 1. while
trying to map 0x100000fc it is raising pte faults .

Santosh Kumar .A

Vision without Action is a daydream... Action without Vision is a nightmare...



On 31 October 2011 12:05, Santosh Kumar <santoshkumar.a@...il.com> wrote:
> I have built a cross compiler for ppc440 in little endian mode and
> using it to build the kernel.
>
> Yes i am running Linux in Little-Endian. This is the first user space
> process. I wrote the below program and running it as init from
> /sbin/init. I have also set the permissions with chmod +s.
>
> main()
> {
>
> while(1){
> printf("hello world");
> sleep(1);
>  }
> }
>
> I have attached the patch.
>
> -
> Santosh Kumar .A
>
> Vision without Action is a daydream... Action without Vision is a nightmare...
>
>
>
> On 31 October 2011 11:21, Michael Neuling <mikey@...ling.org> wrote:
>> Adding linuxppc-dev list to the CC
>>
>>> KERNEL: linux 2.6.39.4
>>> POWERPC: 476, little endian.
>>>
>>> I am trying to get linux 2.6.39.4 up on PPC 476 i have done done
>>> Big-endian to little endian Changes in:
>>
>> Can you explain what you are trying to do in more detail?  What does "i
>> have done Big-endian to little endian Changes" mean?
>>
>>> 1) bitops header file.
>>> 2) while reading the device tree.
>>> 3) the PTE read/computed in head_32.S
>>> 4) added E bit in the TLB entries.
>>>
>>> with all the above changes the kernel_init is done but and inited is
>>> mounted.
>>
>> Can you post your patch?
>>
>> Are you trying to boot the kernel in little endian or just run userspace
>> in little endian?
>>
>>> But while spawning init process the kernel continuously hits pte
>>> faults at address 0x100000fc and never comes out. Please let me know
>>> where i should be looking into.
>>
>> Is this the very first userspace instruction?
>>
>> Mikey
>>
>>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/