386 boot problems with 2.4.7 and 2.4.7-ac9

386 boot problems with 2.4.7 and 2.4.7-ac9

[Carl-Johan Kjellander]

I have an old 386 which ran 2.4.3 just fine. Last night i tried
to upgrade it but it didnt work at all.

I compiled a stock 2.4.7, and since I had seen some postings on
that egcs-2.91.66 didn't compile 2.4.7 I switched to gcc-2.96-85.
The only thing I added to the kernel was ISAPNP support.

The 2.4.7 kernel seems to boot fine, no error messages or nothing,
but it won't start init. The last line is:

   Freeing unused kernel memory: 52K freed

And then it just stops. The kernel is still resonsive but init won't
start. Shift-PageUp still works. SysRQ shows that the EIP almost
always is on the same spot in schedule. I tried init=/bin/sh but
the boot stops at the same place every time.

Then I tried 2.4.7-ac9, same configuration, but that kernel panics.

Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Unable to handle kernel paging request at virtual address c0800000
   printing eip:
c01eb801
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01eb801>]
EFLAGS: 00010283
eax: ffffff00   ebx: c0800000   ecx: 00000008   edx: 00000001
esi: c0800000   edi: c01be12e   ebp: 00800000   esp: c022bfb8
ds: 0018   es: 0018   ss: 0018
Process swapper (pid: 1, stackpage=c022b000)
Stack: 001f4df8 00000000 00000000 c01f4dfc c01e7fd8 c0105000 0008e000 c01e87d2
        00010f00 c0105041 00010f00 c01e7fd8 c0105000 0008e000 c0105472 00000000
        c0105038 00098700
Call Trace: [<c0105000>] [<c0105041>] [<c0105000>] [<c0105472>] [<c0105038>]

Code: f3 a6 0f 97 c2 0f 92 c0 38 c2 75 45 c6 44 24 03 00 31 f6 8a
  <0>Kernel panic: Attemted to kill init!

Relevant parts from System.map are:
c0105000 t rest_init
c0105000 T _stext
c0105000 T stext

c0105038 t init

c010544c T kernel_thread

c01eb7cc t sbf_init

The system is a 386DX with an Award 3.15c BIOS. The distribution
is smalllinux i think, but I've modified it a lot.

Please CC replies to me.

/Carl-Johan Kjellander

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Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Carl-Johan Kjellander]

I figured out how to work ksymoops as well.

This is the panic from 2.4.7-ac9 compiled with gcc-2.96-85 (Red Hat).

ksymoops 2.4.0 on i686 2.4.7.  Options used
      -v vmlinux (specified)
      -K (specified)
      -L (specified)
      -o /lib/modules/2.4.7-ac9/ (specified)
      -m System.map (specified)

No modules in ksyms, skipping objects
Unable to handle kernel paging request at virtual address c0800000
c01eb801
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01eb801>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010283
eax: ffffff00   ebx: c0800000   ecx: 00000008   edx: 00000001
esi: c0800000   edi: c01be12e   ebp: 00800000   esp: c022bfb8
ds: 0018   es: 0018   ss: 0018
Process swapper (pid: 1, stackpage=c022b000)
Stack: 001f4df8 00000000 00000000 c01f4dfc c01e7fd8 c0105000 0008e000 c01e87d2
        00010f00 c0105041 00010f00 c01e7fd8 c0105000 0008e000 c0105472 00000000
        c0105038 00098700
Call Trace: [<c0105000>] [<c0105041>] [<c0105000>] [<c0105472>] [<c0105038>]
Code: f3 a6 0f 97 c2 0f 92 c0 38 c2 75 45 c6 44 24 03 00 31 f6 8a

 >>EIP; c01eb801 <sbf_init+35/184>   <=====
Trace; c0105000 <_stext+0/0>
Trace; c0105041 <init+9/13c>
Trace; c0105000 <_stext+0/0>
Trace; c0105472 <kernel_thread+26/30>
Trace; c0105038 <init+0/13c>
Code;  c01eb801 <sbf_init+35/184>
00000000 <_EIP>:
Code;  c01eb801 <sbf_init+35/184>   <=====
    0:   f3 a6                     repz cmpsb %es:(%edi),%ds:(%esi)   <=====
Code;  c01eb803 <sbf_init+37/184>
    2:   0f 97 c2                  seta   %dl
Code;  c01eb806 <sbf_init+3a/184>
    5:   0f 92 c0                  setb   %al
Code;  c01eb809 <sbf_init+3d/184>
    8:   38 c2                     cmp    %al,%dl
Code;  c01eb80b <sbf_init+3f/184>
    a:   75 45                     jne    51 <_EIP+0x51> c01eb852 <sbf_init+86/184>
Code;  c01eb80d <sbf_init+41/184>
    c:   c6 44 24 03 00            movb   $0x0,0x3(%esp,1)
Code;  c01eb812 <sbf_init+46/184>
   11:   31 f6                     xor    %esi,%esi
Code;  c01eb814 <sbf_init+48/184>
   13:   8a 00                     mov    (%eax),%al

  <0>Kernel panic: Attemted to kill init!

Again, please CC replies to me.

/Carl-Johan Kjellander
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Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Carl-Johan Kjellander]

Maciej Zenczykowski wrote:
>>The system is a 386DX with an Award 3.15c BIOS. The distribution
>>is smalllinux i think, but I've modified it a lot.
>>
> 
> 99% sure that your problem is binaries for 486 and up, had this problem
> installing RedHat 7.1 on a 486 with no CDROM drive - did the installation
> on a Pentium 3, then it would not boot, compiled a new kernel for 486,
> installed that on the P 3, now it booted on the 486 but would not run
> init.  The binaries were for 686 and refused to run...

As I said in my post, the distribution is not Red Hat, but smalllinux,
a very tiny floppydistribution that runs on a 386 with as low as 2MB RAM
(Mine has 4MB).

I only compile new kernels on my Red Hat machine and yes I do compile
it for the 386:

# Processor type and features
#
CONFIG_M386=y

My 386 boots stock 2.4.3 fine but not 2.4.7.

> PS. There should be a choich when installing RedHat in advanced mode what
> processor you want to install for - often enough the computer you are
> installing on is not quite the same as the one it will be running on.
> 

You can do always try to install from the harddrive or via NFS, ftp or
http from your other machines. Red Hat does a lot of smart things during
the install and you have to make sure that for instance glibc is not
the i686 rpm.

/Carl-Johan Kjellander

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Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Brian Gerst]

Carl-Johan Kjellander wrote:
> 
> I have an old 386 which ran 2.4.3 just fine. Last night i tried
> to upgrade it but it didnt work at all.
> 
> I compiled a stock 2.4.7, and since I had seen some postings on
> that egcs-2.91.66 didn't compile 2.4.7 I switched to gcc-2.96-85.
> The only thing I added to the kernel was ISAPNP support.
> 
> The 2.4.7 kernel seems to boot fine, no error messages or nothing,
> but it won't start init. The last line is:
> 
>    Freeing unused kernel memory: 52K freed
> 
> And then it just stops. The kernel is still resonsive but init won't
> start. Shift-PageUp still works. SysRQ shows that the EIP almost
> always is on the same spot in schedule. I tried init=/bin/sh but
> the boot stops at the same place every time.
> 
> Then I tried 2.4.7-ac9, same configuration, but that kernel panics.

Are you using math emulation?  If so there was a bug fixed in the
2.4.8-pre kernels.

--
						Brian Gerst

Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Maciej Zenczykowski]

> The system is a 386DX with an Award 3.15c BIOS. The distribution
> is smalllinux i think, but I've modified it a lot.

99% sure that your problem is binaries for 486 and up, had this problem
installing RedHat 7.1 on a 486 with no CDROM drive - did the installation
on a Pentium 3, then it would not boot, compiled a new kernel for 486,
installed that on the P 3, now it booted on the 486 but would not run
init.  The binaries were for 686 and refused to run...

MaZe.

PS. There should be a choich when installing RedHat in advanced mode what
processor you want to install for - often enough the computer you are
installing on is not quite the same as the one it will be running on.

Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Carl-Johan Kjellander]

Randy.Dunlap wrote:
> Carl-Johan Kjellander wrote:
> 
>>Then I tried 2.4.7-ac9, same configuration, but that kernel panics.
>>
> 
> Hi-
> 
> There's a patch for this in 2.4.7-ac11.

I just tried 2.4.7-ac11 and it worked beautifully! Thanks Alan.

/Carl-Johan Kjellander
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Re: 386 boot problems with 2.4.7 and 2.4.7-ac9

[Alan Cox]

> This is the panic from 2.4.7-ac9 compiled with gcc-2.96-85 (Red Hat).
> 
> ksymoops 2.4.0 on i686 2.4.7.  Options used

Thanks. For some reason it crashed probing the simple boot flag ACPI
structure. I'll try and work out how and why then send you a diff