The yaboot package is a boot loader for Open Firmware based PowerPC systems. It can be used to boot IBM eServer System p machines.
If the string that represents the path to kernel (or ramdisk) is greater than 63 characters, network booting an IBM Power5 series system may result in the following error:
FINAL File Size = 8948021 bytes.
DEFAULT CATCH!, exception-handler=fff00300
The firmware for IBM Power6 and IBM Power7 systems contains a fix for this issue. (BZ#550086)