buildroot to build toolchain on Linux

hi hippo:

1, I find the kernel linux.2.6.x more steady then other kernel.because I run some

app on the 2.6.x is fine,but other kernel weill died.

2.I want to use 2.6.x vmlinux in cfi flash, so i use follow command:

# Creating .flash file for the project

elf2flash --base=0x00000000 --end=0x07ffffff --reset=0x0 --input=vmlinux --output=ext_flash.flash --boot=$SOPC_KIT_NIOS2/components/altera_nios2/boot_loader_cfi.srec# Programming flash with the project

nios2-flash-programmer --base=0x00000000 ext_flash.flash --sof=flash.sof

I program flash succesed.

I restart my dvb but boot kernle failed. If I use command "nio2-download -g vmlinux" ,the kernel boot successed.