callpc = fp->fr_pc;
if (!INKERNEL(callpc))
break;
/*
* Don't bother traversing trap-frames.
* tl0_* and tl1_* are just below fork_trampoline
*/
if (callpc < (vm_offset_t)fork_trampoline)
if (stack_put(st, callpc) == -1)
fp = (struct frame *)(fp->fr_fp + SPOFF);