On Sun, Feb 1, 2009 at 10:42 AM, <lu...@proxima.alt.za> wrote: >> This is what I'm doing on bg/p now. I've got a small program that >> reads in an elf binary, sets up the argv/env/aux vector(ppc thing) and >> jumps to main. It works. I use libmach. > > Can you share documentation and code? Although I would have to limit > my experimentation to the 386 platform rather than the PPC.
--rw-r--r-- M 1614 rminnich sys 7183 Feb 1 15:06 /n/sources/contrib/rminnich/bgp/machcnk.c There is stuff in there specific to bgp, as you can see. This is derived from gpl'ed code fore coreboot but I was able to use the wonderful libmach -- which does need a few more changes, I have a private copy with an enhancement I doubt you will need. It's pretty simple code and you won't need the devsegment stuff -- that's a very bgp-specific requirement -- you can just malloc code for text and data, and you can just use the plan 9 heap, whereas bgp needs a different heap. Long story. > > And what do you use to generate the ELF code? Static or dynamic? The BGP toolchain, which produces statically linked binaries. I am also supporting limited linux emulation on BGP but in kernel. The notes approach is higher overhead than I want to pay. The open and write of /dev/cnk is what flips a process into "linux system call interface" mode. The only mmap I support is for anon memory. thanks ron
