I investigated this some more and i think i found the problem. The crosscompiler is working ok now and my coreboot rom has the same size as the one from the automatic build system of coreboot.org exept for the SeaBios payload mine is 46881 bytes and the one from the automatic build system of coreboot.org is 33545 bytes.(same stable version) My SeaBios payload exceeds the romchip size of the technologic/ts5300 hence the error. Correct me if i am wrong but it seems to me that the SeaBios payload is not build by crossgcc . To have a host independable coreboot buildsystem i think the SeaBios makefile should be patched after downloading in the same way as the coreboot makefile so it uses the crossgcc. That way everybody that uses crossgcc should have the same results as the automatic build system of coreboot.org. I think that when the results are not the same on all different host systems the crosgcc is useless as reference.
Thanks, Nils.