[linuxsh-dev] Re: [linux-sh:02352] performance data from modules.

[M. R. B. <mr...@0x...>]

* Pete LeMasters <pet...@st...> on Fri, May 10, 2002:

>=20
> I have been attempting to generate profile data from a loadable module un=
der
> 2.4.17 on an SH4 based development board.
>=20

Why do you need profile data from a loadable module?  What's wrong with
getting the data with the driver compiled into the kernel?  Does your
module execute differently than when compiled in?

>=20
> Separately, I have also tried to making use of the -pg option provided by
> gcc but upon trying to load the module, I get an undefined symbol "mcount=
",
> which I believe is supposed to be provided by linking a profile specific
> library??  I can't find a reference to mcount in the 2.4.17 kernel source,
> so it's location is an assumption on my part.
>=20

You need profiling support as provided by the C library (this usually comes
with pgcrt0.o or similiar).

M. R.