Re: [nwst-dev] cross-compiling kernel for NetworkStation

[Jochen R. <jo...@pa...>]

Hi Stefan,

Still out here, just really really busy.

The 2.4.21 kernel with patch never compiled properly with the older gcc 
tool chain from the tarball on sourceforge.

Stefan Ulrich Hegner wrote:
 > powerpc-linux-gcc -D__ASSEMBLY__ -D__KERNEL__
 > -I/home/hegi/netstation/ns1000/usr/src/linux-2.4.21/include
 > -I/home/hegi/netstation/ns1000/usr/src/linux-2.4.21/arch/ppc   -c -o
 > cpu_setup_6xx.o cpu_setup_6xx.S
 > cpu_setup_6xx.S: Assembler messages:
 > cpu_setup_6xx.S:405: Error: Unrecognized opcode: `mftbl'
 > cpu_setup_6xx.S:406: Error: Unrecognized opcode: `mftbl'
 > make[1]: *** [cpu_setup_6xx.o] Fehler 1

In cpu_setup_6xx.S, change 'mftbl' to 'mftb' and at least this file 
should compile.

Stefan Ulrich Hegner wrote:
 > Am Sonntag, den 21.01.2007, 13:18 +0100 schrieb Armin Schindler:
 >> maybe it's the wrong compiler version?
 > no but a broken cross-compile-chain.

I think that's a wild guess at best, right? I know that these things can 
be extremely frustrating but I find it important to always look at 
things objectively. Like Armin said, wrong compiler version. That does 
not make it a broken tool.

The ppc platform alternate mnemonics at some point changed in binutils, 
and the kernel folks adopted these changes when they started 
recommending gcc 3 for compilation. This is from memory, and I could be 
wrong on the gcc version.

Stefan Ulrich Hegner wrote:
 > The Problem is now, that the resulting kernel (taking the 2.4.29
 > vanilla sources + patch from the project and the config from
 > coruna as "oldconfig") is too big.
 >
 > "Address out fo range. File is bad or too large for installed memory."
 >
 > The new kernel has 847.521 bytes whereas the old one had only
 > 786.920.

Here are some kernels that all worked for me in the past:

[jochen@jt ns1000]$ l kernels/ibm/kernel.1000
-rw-rw-r-- 1 jochen users 4275584 Jul 20  2000 kernels/ibm/kernel.1000
[jochen@jt ns1000]$ l kernels/fb
total 7032
-rw-rw-r-- 1 jochen users 1180180 Dec 11  2002 k_hda2
-rw-rw-r-- 1 jochen users 1180180 Dec 18  2002 k_hda3
-rw-rw-r-- 1 jochen users 1180180 Dec 18  2002 k_hda4
-rw-rw-r-- 1 jochen users 3613204 Dec 10  2002 k_initrd

It may be that the ELF header generated by the crosstool-based
linker is not compatible with the ns1000 firmware loader.

Also, did the ncdcs tool complain about anything?

Regards,
Jochen