I have an embedded Linux system on a Freescale PPC board. It is using a flash with those zones:
- U-Boot (1.1.3)
- U-Boot parameters
- Linux kernel (2.6.11)
- GNU/Linux root filesystem (JFFS2) In exploitation, I want to be able to update the software files (from an Ethernet connection). There is not problem updating part of GNU/Linux software (in the JFSS2 partition), but how can I update the Linux kernel which is on the flash?
Eric Levenez ha scritto:
You should investigate looking for u-boot environment current settings. Take a look at u-boot manual :
Ciao
Le 20/05/06 18:15, dans , « Marco Cavallini » a écrit :
I know how to change U-boot setting and choose a particular Linux kernel when I am in the U-Boot command line interface. But what I don't know is how to write in flash a new kernel and how to update the U-Boot variables when I am running in the GNU/Linux environment.
I have read more carefully the U-boot document, and found that I have to installed a flash device driver (/dev/mtd) in Linux to access raw flash memory. With that I should be able to put a second linux kernel in the flash. That's fine.
The second step would be to read the U-boot setup, patch the address on the new kernel, and rewrite the setup in flash.
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