Hi Justin,
> The trick is only needed in user space, as a shim between two
> functions, so I just need any volatile registers that I can use but
> aren't function arguments. The target is G4/G5. I only need 3 or 4
> volatile registers, but the more the better.
You'll probably have to use the stack to spill the param register.
Have a look at the MCOUNT macro in ppc's <machine/profile.h> for an
example of code that is an intercept between two routines and has to
assume that all param registers are used
(
http://svn.freebsd.org/viewvc/base/head/sys/powerpc/include/profile.h?view=markup&pathrev=153813
is the version that has the code fragment commented).
later,
Peter.
_______________________________________________
freebsd-ppc@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-ppcTo unsubscribe, send any mail to "
freebsd-ppc-unsubscribe@..."
