i386_getdev
i386_getdev((void **)(&rootdev), NULL, NULL);
i386_getdev((void**)&rootdev, rootdevname, NULL);
archsw.arch_getdev = i386_getdev;
i386_getdev((void **)&bdev, boot_devname, NULL);
if (i386_getdev((void **)&ddesc, root, NULL)) {
i386_getdev((void **)(&rootdev), rootdevname, NULL);
i386_getdev(NULL, kernelname, &kernelpath);
i386_getdev((void **)(&rootdev), rootdevname, NULL);
int i386_getdev(void **vdev, const char *devspec, const char **path);
i386_getdev((void **)(&rootdev), fp->f_name, NULL);
i386_getdev((void **)(&rootdev), NULL, NULL);
i386_getdev((void **)(&rootdev), argv[1], NULL);
archsw.arch_getdev = i386_getdev;