Is there any way to turn it in a compressed and executable vmlinuz? Or to build it?
In linux/arch/powerpc/boot there is a script called "wrapper" which will build the correct kernel image for you.
"vmlinux" is not simply an uncompressed image; it should by rights be a small boot wrapper which decompresses a kernel into RAM and boots from it. It may be compressed or not depending on how it is built, but if it is built under the "powerpc" architecture it should always be.
"zImage[.chrp]" is just another name for it. However a ZImage generally implies that it contains an initramfs or other filesystem image, which is further loaded by the boot wrapper.
I'v been able to obtain instead, a zImage.chrp file. It's a very small file (1,6 M). Should I use it with some special boot option to see if it works?
Sorry if I'm not very clear, but, as you can see, I'm still a newby on Linux....
boot scsi:0 zImage.chrp console=ttyPSC0 or video=radeonfb would help you here to see if something pops up.. depending on what you want your output to be. Otherwise you will not see a great deal of printed text besides the boot wrapper loading the initramfs.
Don't forget root= if you have a disk to boot from and don't have an initramfs included.
Matt Sealey, Genesi USA Inc.
Product Development Analyst