topic DLKM developmet question in Operating System - HP-UX

DLKM developmet question

Alex Shinkin — Sun, 26 Feb 2006 20:44:15 GMT

Hi , All .

I am developing a DLKM for an Itanium box
running HP-UX 11.23.

If I login as root and build the module - I have a working binary that can be loaded/unloaded by kcmodule as expected.

But if I login as another user and build the module, I have a binary that could not be loaded by kcmodule, giving errors:

WARNING: MOD: mod_obj_relone: Overrun of module DLT or long branch stub table for module /stand/current/mod/mymodule.
NOTICE: MOD: mod_obj_load: Relocation in module /stand/current/mod/mymodule failed.

WARNING: mod_deletestr: could not find string in the dump string table

MOD: mod_load_helper: error loading mymodule

The object files (including modmeta) are binary equal for both builds.

But the results of modlink have 1 byte difference (well, if not look at timestamps).
Fixing the byte in "nonworking" binary gives us a "working" one.

So, quiestion - is there any enviroment dependency or whatever that makes modlink produce different binaries ?
How can I get the "correct" DLKM binary , not being logged in as root ?

Thanks for any suggestions.

Re: DLKM developmet question

Alex Shinkin — Mon, 27 Feb 2006 01:17:42 GMT

Wow, I have solved it .
looks like modlink uses current $PATH , executing ld and maybe some other executables... so the PATH was a bit incorrect in the user's account and another (probably older) versions of ld were in use.
Anyway, modlink could be more verbous ...

Re: DLKM developmet question

Alex Shinkin — Thu, 02 Mar 2006 00:53:59 GMT

maybe this will be interesting for anyone ...

To be more precise it was GNU nm 2.15 that causes building of unloadable module.

Using HP nm (nm HP Itanium(R) B.12.23 REL 040623) has solved the problem .