kldload dtraceall exec format error

[Brandon Gooch]

On Thu, Sep 1, 2011 at 12:27 PM, Charlie Martin <crmartin at sgi.com> wrote:
>
>
> On 2011-09-01 11:23, Garrett Cooper wrote:
>>
>> On Thu, Sep 1, 2011 at 9:56 AM, Charlie Martin<crmartin at sgi.com>  wrote:
>>>
>>> Okay, I'll grant this is probably a horrid noob question, but then on the
>>> Free kernel I'm a horrid noob so I guess it makes sense.  This is for
>>> FreeBSD
>>>
>>> FreeBSD psmdev1 8.1-RELEASE-p2 FreeBSD 8.1-RELEASE-p2
>>>
>>> per uname -a.
>>>
>>> We have a FreeBSD based product on the AMD64 architecture; I'm trying to
>>> enable DTrace.  The file amd64/conf/GENERIC with which the kernel was
>>> compiled has the required lines
>>>
>>> options     KDTRACE_FRAME        # Ensure frames are compiled in
>>> options     KDTRACE_HOOKS        # Kernel DTrace hooks
>>> options     DDB_CTF                 # for DTrace
>>>
>>> but when I try kldload dtraceall I get
>>>
>>> kldload: can't load dtraceall: Exec format error
>>>
>>>  From Google I get that this probably means some mismatch in compiles,
>>> but
>>> I'm unclear what to look for.  Also, another big part of the product,
>>> compiled from the same master Makefile, *does* have dtrace enabled
>>> successfully.
>>>
>>> Hints, suggestions, and pointers to documentation gleefully accepted.
>>
>> What does dmesg say?
>> Thanks,
>> -Garrett
>>
> link_elf_obj: symbol lapic_cyclic_clock_func undefined
> linker_load_file: Unsupported file type
> KLD profile.ko: depends on cyclic - not available or version mismatch
> linker_load_file: Unsupported file type
> KLD dtraceall.ko: depends on profile - not available or version mismatch
> linker_load_file: Unsupported file type
> link_elf_obj: symbol lapic_cyclic_clock_func undefined
> linker_load_file: Unsupported file type
> KLD profile.ko: depends on cyclic - not available or version mismatch
> linker_load_file: Unsupported file type
> KLD dtraceall.ko: depends on profile - not available or version mismatch
> linker_load_file: Unsupported file type
>
> Aha, dmesg.  Thanks.
>

I'm guessing you've read this:

http://wiki.freebsd.org/DTrace

Make certain you've configure your kernel correctly, and that you've
rebuilt your kernel and modules...

-Brandon