host_mmap
void *host_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off);
host_mmap(0, size, HOST_PROT_READ | HOST_PROT_WRITE, \
va = host_mmap(0, PAGE, HOST_PROT_READ, HOST_MAP_SHARED, smbios_fd, pa2);