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Re: GNU Mach: disabling all network device drivers

From: Zheng Da
Subject: Re: GNU Mach: disabling all network device drivers
Date: Mon, 7 Jun 2010 01:40:26 -0400


On Sun, Jun 6, 2010 at 5:57 PM, Samuel Thibault <samuel.thibault@gnu.org> wrote:
> Hello,
> Zheng Da, le Thu 13 May 2010 08:59:59 -0400, a écrit :
>> I boot hurd with the new kernel and run the user-level network drivers
>> but got a kernel
>> general protection trap. I tried several drivers and always got the
>> same problem.
>> The error can be seen at http://i.imagehost.org/0382/Screenshot.png.
> Are you still getting this issue?
> Could you check the address at the top of the stack? i.e. use
> show registers
db> show registers
cs                 0x8
ds                0x10
es                0x10
fs                0x10
gs                0x10
ss                0x10
eax                0x5
ecx               0x1c
edx                0x5
ebx            0x2c4a0
esp           0x1973e0
ebp          0x125bc30
esi            0x2c020
edi             0xc020
eip           0x1076e6
efl              0x297
> to know the value of esp, say 0x2f0094, and use
> examine 2f0094
db> examine 0x1973e0
> for instance, to get the value. Also, you could add
>        popl %edx
>        pushl %edx
> just before the ret, to determine whether the issue is the stack itself
> or the return address.
Kernel General protection trap, eip 0x1076e6
kernel: General protection (13), code=25a
Stopped at  0x1076e6:   popl    %edx
db> trace
Bad frame pointer: 0x1

So it stops at exactly the same location. Is it the problem that %esp
points to a wrong stack?

Best regards,
Zheng Da

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