emu_memalloc
static void *emu_memalloc(struct sc_info *sc, u_int32_t sz, bus_addr_t *addr);
buf = emu_memalloc(sc, sz, &tmp_addr);
vbuf = emu_memalloc(&sc->mem, sz, &tmp_addr, "vinit");
static void* emu_memalloc(struct emu_mem *mem, uint32_t sz, bus_addr_t * addr, const char * owner);