On Fri, Feb 28, 2014 at 10:27 AM, Lucas De Marchi <lucas.de.marchi@xxxxxxxxx> wrote: > On Fri, Feb 28, 2014 at 2:33 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: >> I'm working on virtme >> (https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git/), a tool >> to easily test a kernel without a disk image or any need to install >> that kernel. I want to have full support for loading modules from a >> kernel tree, but depmod is getting in the way. >> >> What I think I want is a way to generate modules.dep, etc in a >> subdirectory of the kernel build directory. The hierarchy needs to be >> such that: >> >> - modprobe --show-depends would work. >> - I could symlink and/or bind-mount things into /lib/modules so that >> modprobe, udev, etc all work. >> >> One approach that should work: >> >> .tmp_moddep/build: a symlink to '..' >> .tmp_moddep/modules.dep, etc: the usual, with module paths that point >> into build/ >> >> The problem is that getting depmod to generate anything remotely like >> this is basically impossible. >> >> Here are two changes to depmod that would, I think, make this possible: >> >> 1. Add --moddir, an option to specify the target directory directly. >> That is, if --moddir is used, then -b would be illegal, the kernel >> version could not be specified, and cfg.dirname would be set to the >> argument of --moddir, literally. >> >> 2. Allow relative paths to modules on the command line. Such paths >> would be interpreted relative to cfg.dirname. (That would probably be >> easiest if depmod would chdir into cfg.dirname.) >> >> To finish the job, modprobe would need a --moddir argument as well. >> >> Thoughts? Is there a different approach I should be taking here? > > Did you already take a look in the testsuite? We can execute modprobe > and depmod there. > Would that approach be feasible for you? I don't think so. I could make a silly hierarchy like build_dir/lib/modules/version/whatever, but populating it is a PITA -- there's no good way to specify explicit *relative* paths. I'll follow up with a patch. > > Lucas De Marchi -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-modules" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
