Trying to build L4 on NixOS
czapkofan at gmail.com
Sat Mar 25 00:12:31 CET 2017
Hm; tried adding the following line:
hardeningDisable = [ "stackprotector" "pic" ];
per https://github.com/NixOS/nixpkgs/issues/18895 and
https://github.com/NixOS/nixpkgs/issues/18995. This now seems to get me
through the bootstrap.elf linking phase! But it fails soon afterwards on
bootstrap32.elf :-( with:
ld: skipping incompatible
when searching for -lgcc
ld: cannot find -lgcc
Can I skip building bootstrap32.elf somehow? Or should I not?
Do I even have to build l4, or do I only need fiasco for l4linux? (fiasco
seems to build OK with the initial hardeningDisable = [ "all" ]; I tried.)
Or none at all, just the sources?
On Fri, Mar 24, 2017 at 10:06 PM, Mateusz Czaplinski <czapkofan at gmail.com>
> I'm trying to build L4 on NixOS in a VM (long term goal: try to learn how
> to replace NixOS's kernel with L4Linux, then maybe Genode). I'm getting an
> error like below:
> undefined reference to `__stack_chk_fail'
> during linking of bootstrap.elf - in a GCC's error-barf just after:
> [bootstrap] ==> Linking bootstrap.elf
> I've put up the precise Nix expression/script I'm using to build it on
> github - at:
> but what it generally boils down to is a sequence of commands like this:
> $ wget http://os.inf.tu-dresden.de/download/snapshots/l4re-core-
> $ tar xf l4re-core-2016082114 <(201)%20608-2114>.tar.xz
> $ cd l4re-core-2016082114 <(201)%20608-2114>
> $ mkdir out
> $ cp src/l4/mk/defconfig/config.amd64 out/l4/.kconfig
> $ make -C src/l4 O=out/l4 olddefconfig
> $ make -C out/l4
> I've tried various additional changes, based on some snippets found here
> and there on teh Internets, like:
> - adding V=0 to the last make (no idea what it does yet, just some cargo
> - adding NIX_CFLAGS_COMPILE = "-fno-stack-protector"; to the Nix
> expression/script (also not really sure where it applies in the stack);
> but none of the above helped.
> Any idea what I could try doing to push it further?
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