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kernel cross-compile problem with embdebian's toolchain

Hello @list!

I have a pxa270 based custom board... I got a sdk for with toolchain with it and an old kernel source (with drivers to my custom board) which I can change and recompile...

I would like to compile a newer system to my board.
I would like to use a newer toolchain than the original, and I found the emdebian has a toolchain for ARM architecture.
I install it to a debian box... (I followed this: http://www.emdebian.org/tools/crosstools.html )
I compile a static "Hello world!" with the emdebian cross-gcc and it works properly on my board (it has an old preinstalled system)...
I recompile the old (original) kernel in emdebian toolchain and it works properly too...

After that, I ported the drivers to the latest stable mainline kernel and now I would like to compile it...

I compile the new kernel with the emdebian toolchain (the compilation were success) but it didn't start...
I got these errors when the kernel would like to start:
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

Starting kernel ...

undefined instruction
pc : [<a040896c>]    lr : [<a1714e30>]
sp : a16bfcec  ip : 00000005  fp : 00000002
r10: 00000000  r9 : a16e04e0  r8 : a16bffdc
r7 : a1721bf8  r6 : a16c028e  r5 : a0000154  r4 : a000015a
r3 : a0008000  r2 : a0000100  r1 : 00000196  r0 : 00000000
Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

resetting ...

BUT, when I compile the new kernel in the old (orig) toolchain it works!!!

Old kernel recompile works both old toolchain and new toolchain...
New kernel recompile works only with the old toolchain...

The compilation steps which I used for the toolchains (uboot bootloader):
${CROSS_COMPILE}objcopy -O binary -R .note -R .comment -S vmlinux linux.bin
gzip -9 linux.bin
mkimage -A arm -O linux -T kernel -C gzip -a 0xa0008000 -e 0xa0008000 -n "New kernel" -d linux.bin.gz  newkernel.img

So the questions are:
Where is the problem?
What is the problem?

Zachár Balázs

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