PMC_FN_USER_CALLCHAIN
ASSYM(PMC_FN_USER_CALLCHAIN, PMC_FN_USER_CALLCHAIN);
ph(td, PMC_FN_USER_CALLCHAIN, &frame->tf_idt);
case PMC_FN_USER_CALLCHAIN:
ASSYM(PMC_FN_USER_CALLCHAIN, PMC_FN_USER_CALLCHAIN);
pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, tf);
pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, framep);