sbbctrace
struct sbbctrace sbbctrace_buffer[NSBBCTRACE+1];
struct sbbctrace *sbbctrace_ptr;
extern struct sbbctrace sbbctrace_buffer[];
extern struct sbbctrace *sbbctrace_ptr;
if ((struct sbbctrace *)(void *)_p >= &sbbctrace_buffer[NSBBCTRACE])\
sbbctrace_ptr = (struct sbbctrace *)(void *)_p; \