Denys Vlasenko wrote: > I want to do it in "Linux from scratch" style. This way, > I will get better understanding of the way it is done, > and possibly stumble upon rough edges in busybox, > uclubc, etc. This will lead to "itch scratching" > and bug fixing.
It will also lead to unnecessary pain. > elf binaries, it says "BINFMT_FLAT: bad magic/rev (0x1010100, need 0x5)". One thing I just remembered is that we used to have non-standard flat files. Version 5 doesn't exist in any tools/kernels other than ancient Blackfin distributions. Our tools were fixed long ago to generate version 4 flat binaries. With a modern toolchain you can't actually produce binaries that will run on the 2005 kernel you're using (never mind that it's totally bug-infested anyway), so please upgrade that first. There's a u-boot installed on your board, surely? > To be honest, building it was somewhat contrived - I copied the directory > into binutils' build dir and gave it all necessary configure parameters, > and it still could not find e.g. elf/bfin.h - had to add some include paths > by hand. (Do you want a more detailed report about this?) No. Use the buildscript or look at how it does things. > Looking into ld-elf2flt makes me doubtful - > "LINKER="$0.real" # the original renamed-linker" - really? It will rename > my linker and replace it by itself? Yes. There'll be bfin-uclinux-ld and bfin-uclinux-ld.real, the former being the ld-elf2flt script which in turn calls the real ld and the elf2flt binary. > This script looks rather contrived, > will it really work correctly for all possible invocations of ld which > don't even want to do any elf2flt-ification? So far we've not had reports to the contrary. > Can you write up a small explanation what elf2flt does, how to produce > a flat executable with it? Let's say in my situation - I seem to have > correctly built static elf bfin busybox, can I make a flat one out of it? Nope. It's lacking the relocs. > What is this ld-elf2flt wrapper - what is it doing? Calling ld and elf2flt in a way to generate correct flat binaries. Bernd -- This footer brought to you by insane German lawmakers. Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen Sitz der Gesellschaft Muenchen, Registergericht Muenchen HRB 40368 Geschaeftsfuehrer Thomas Wessel, William A. Martin, Margaret Seif _______________________________________________ uClibc mailing list [email protected] http://busybox.net/cgi-bin/mailman/listinfo/uclibc
