Re: rump core on module load

[Paul Goyette <paul%whooppee.com@localhost>]

On Fri, 5 May 2017, Patrick Welche wrote:

> Toying with a kernel module,
>
> export RUMP_SERVER=unix:///tmp/sock
> rump_allserver -svm /usr/src/sys/modules/abt/obj.amd64/abt.kmod ${RUMP_SERVER}
>
> dumps core. The odd thing is that modload is happy!
>
> #0  0x00000000e5405e57 in ?? ()
> #1  0x00007f7fe48b0efb in module_do_load (name=0x7f7ff7bccc00 "/module.mod",
>    isdep=false, flags=0, props=0x0, modp=0x0, modclass=MODULE_CLASS_ANY,
>    autoload=false)
>    at /usr/src/lib/librump/../../sys/rump/../kern/kern_module.c:1127
> #2  0x00007f7fe48afd0b in module_load (filename=0x7f7ff7bccc00 "/module.mod",
>    flags=0, props=0x0, modclass=MODULE_CLASS_ANY)
>    at /usr/src/lib/librump/../../sys/rump/../kern/kern_module.c:593
> #3  0x00007f7fe484e78c in handle_modctl_load (
>    ml_filename=0x204297 "/module.mod", ml_flags=0, ml_props=0x0,
>    ml_propslen=0)
>    at /usr/src/lib/librump/../../sys/rump/../kern/sys_module.c:103

The address in traceback #1 appears to be the retrun from calling the 
module's xxx_modcmd(MODULE_CMD_INIT, ...) so I would add some printf()s 
into the module to see why it is dying.


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