[LinuxBIOS] a slight change to startup and elf images

Stefan Reinauer stepan at coresystems.de
Sat Jul 22 09:01:41 CEST 2006

* Ronald G Minnich <rminnich at lanl.gov> [060601 16:09]:
> Right now, we use mkelfimage to set up parameter blocks for linux. There 
> is a lot of code to do this, and I am running out of room on OLPC. I 
> need to build tiny elf images with on executable code in them (other 
> than your kernel, of course).
> I have modified mkelfimage so that it produces an elfimage with only 3 
> segments: command line, kernel, initrd. With this option, you can build 
> a very simple elfimage with just those three things.
> There is the issue of setting up %esi for 386 linux. I am considering 
> the following convention:
> architecture-independent part (src/boot/)
> For the first PT_LOAD elf segment, assume it is the command line. Set a 
> variable, command_line, to the load address of this segment.
> architecture-dependent, e.g. 386 (src/cpu/boot.c)
> set %esi to command_line.
> If you are using normal mkelfimage, this is a no-op: esi setting is 
> ignored. If you are using mkelfimage with my option (e.g. OLPC), this 
> address will be used as the command line pointer.
> I can't see a problem, any comments?

Is this part of the official version? Or should we put a version in the
LB tree? OR just a patch?

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