Date: Thu, 17 Jan 2008 14:10:25 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org Subject: kldstat causes kernel to print odd message Message-ID: <200801171410.38488.doconnor@gsoft.com.au>
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Hi,
I have built my own release of 6.3 (slightly older than 6.3 as tagged)
and I am seeing an odd cosmetic problem. Whenever I kldload a module
(stuff loaded by the loader doesn't do it) I get this in dmesg..
kldload: Unsupported file type
The actual module works fine though (shows up in kldstat etc)
I traced the call path kldstat -> linker_load_module -> linker_load_file
And it seems that the TAILQ_FOREACH() in linker_load_file is iterating
over 2 things - 'elf64' and 'elf64_obj'.
LINKER_LOAD_FILE is defined by linker_if.m/h and looks like..
static __inline int LINKER_LOAD_FILE(linker_class_t cls, const char*
filename,
linker_file_t* result)
{
kobjop_t _m;
KOBJOPLOOKUP(cls->ops,linker_load_file);
return ((linker_load_file_t *) _m)(cls, filename, result);
}
Now it seems that link_elf.c and link_elf_obj.c both define identical
methods & function names with very similar code.
The one in link_elf_obj.c works and the one in link_elf.c doesn't.. I am
not sure why they both exist though.
The one in link_elf.c fails at..
if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) {
link_elf_error("Unsupported file type");
error = ENOEXEC;
goto out;
}
I note that the _obj version checks if e_type is ET_REL (and lo it is).
Can anyone explain what the underlying problem is? (I am guessing some
ordering issue where normally elf64_obj is called first so the other is
normally never called..)
Thanks.
--
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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