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rump.c revision 1.160 
      1 /*	$NetBSD: rump.c,v 1.160 2010/04/14 10:27:53 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Development of this software was supported by Google Summer of Code.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     23  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: rump.c,v 1.160 2010/04/14 10:27:53 pooka Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/atomic.h>
     35 #include <sys/buf.h>
     36 #include <sys/callout.h>
     37 #include <sys/conf.h>
     38 #include <sys/cpu.h>
     39 #include <sys/device.h>
     40 #include <sys/evcnt.h>
     41 #include <sys/event.h>
     42 #include <sys/exec_elf.h>
     43 #include <sys/filedesc.h>
     44 #include <sys/iostat.h>
     45 #include <sys/kauth.h>
     46 #include <sys/kernel.h>
     47 #include <sys/kmem.h>
     48 #include <sys/kprintf.h>
     49 #include <sys/ksyms.h>
     50 #include <sys/msgbuf.h>
     51 #include <sys/module.h>
     52 #include <sys/once.h>
     53 #include <sys/percpu.h>
     54 #include <sys/pipe.h>
     55 #include <sys/queue.h>
     56 #include <sys/reboot.h>
     57 #include <sys/resourcevar.h>
     58 #include <sys/select.h>
     59 #include <sys/sysctl.h>
     60 #include <sys/syscall.h>
     61 #include <sys/timetc.h>
     62 #include <sys/tty.h>
     63 #include <sys/uidinfo.h>
     64 #include <sys/vmem.h>
     65 #include <sys/xcall.h>
     66 
     67 #include <rump/rumpuser.h>
     68 
     69 #include <secmodel/suser/suser.h>
     70 
     71 #include <prop/proplib.h>
     72 
     73 #include <uvm/uvm_readahead.h>
     74 
     75 #include "rump_private.h"
     76 #include "rump_net_private.h"
     77 #include "rump_vfs_private.h"
     78 #include "rump_dev_private.h"
     79 
     80 struct proc proc0;
     81 struct session rump_session = {
     82 	.s_count = 1,
     83 	.s_flags = 0,
     84 	.s_leader = &proc0,
     85 	.s_login = "rumphobo",
     86 	.s_sid = 0,
     87 };
     88 struct pgrp rump_pgrp = {
     89 	.pg_members = LIST_HEAD_INITIALIZER(pg_members),
     90 	.pg_session = &rump_session,
     91 	.pg_jobc = 1,
     92 };
     93 struct pstats rump_stats;
     94 struct plimit rump_limits;
     95 struct filedesc rump_filedesc0;
     96 struct proclist allproc;
     97 char machine[] = "rump";
     98 static kauth_cred_t rump_susercred;
     99 
    100 /* pretend the master rump proc is init */
    101 struct proc *initproc = &proc0;
    102 
    103 struct rumpuser_mtx *rump_giantlock;
    104 
    105 sigset_t sigcantmask;
    106 
    107 struct device rump_rootdev = {
    108 	.dv_class = DV_VIRTUAL
    109 };
    110 
    111 #ifdef RUMP_WITHOUT_THREADS
    112 int rump_threads = 0;
    113 #else
    114 int rump_threads = 1;
    115 #endif
    116 
    117 static char rump_msgbuf[16*1024]; /* 16k should be enough for std rump needs */
    118 
    119 static void
    120 rump_aiodone_worker(struct work *wk, void *dummy)
    121 {
    122 	struct buf *bp = (struct buf *)wk;
    123 
    124 	KASSERT(&bp->b_work == wk);
    125 	bp->b_iodone(bp);
    126 }
    127 
    128 static int rump_inited;
    129 static struct emul emul_rump = {
    130 	.e_vm_default_addr = uvm_default_mapaddr,
    131 };
    132 
    133 int rump__unavailable(void);
    134 int rump__unavailable() {return EOPNOTSUPP;}
    135 __weak_alias(rump_net_init,rump__unavailable);
    136 __weak_alias(rump_vfs_init,rump__unavailable);
    137 __weak_alias(rump_dev_init,rump__unavailable);
    138 
    139 __weak_alias(rump_vfs_fini,rump__unavailable);
    140 
    141 __weak_alias(biodone,rump__unavailable);
    142 __weak_alias(sopoll,rump__unavailable);
    143 
    144 void rump__unavailable_vfs_panic(void);
    145 void rump__unavailable_vfs_panic() {panic("vfs component not available");}
    146 __weak_alias(usermount_common_policy,rump__unavailable_vfs_panic);
    147 
    148 rump_proc_vfs_init_fn rump_proc_vfs_init;
    149 rump_proc_vfs_release_fn rump_proc_vfs_release;
    150 
    151 static void add_linkedin_modules(const struct modinfo *const *, size_t);
    152 
    153 static void __noinline
    154 messthestack(void)
    155 {
    156 	volatile uint32_t mess[64];
    157 	uint64_t d1, d2;
    158 	int i, error;
    159 
    160 	for (i = 0; i < 64; i++) {
    161 		rumpuser_gettime(&d1, &d2, &error);
    162 		mess[i] = d2;
    163 	}
    164 }
    165 
    166 /*
    167  * Create kern.hostname.  why only this you ask.  well, init_sysctl
    168  * is a kitchen sink in need of some gardening.  but i want to use
    169  * kern.hostname today.
    170  */
    171 static void
    172 mksysctls(void)
    173 {
    174 
    175 	sysctl_createv(NULL, 0, NULL, NULL,
    176 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "kern", NULL,
    177 	    NULL, 0, NULL, 0, CTL_KERN, CTL_EOL);
    178 
    179 	/* XXX: setting hostnamelen is missing */
    180 	sysctl_createv(NULL, 0, NULL, NULL,
    181 	    CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_STRING, "hostname",
    182 	    SYSCTL_DESCR("System hostname"), NULL, 0,
    183 	    &hostname, MAXHOSTNAMELEN, CTL_KERN, KERN_HOSTNAME, CTL_EOL);
    184 }
    185 
    186 int
    187 rump__init(int rump_version)
    188 {
    189 	char buf[256];
    190 	struct timespec ts;
    191 	uint64_t sec, nsec;
    192 	struct proc *p;
    193 	struct lwp *l;
    194 	int i;
    195 	int error;
    196 
    197 	/* not reentrant */
    198 	if (rump_inited)
    199 		return 0;
    200 	else if (rump_inited == -1)
    201 		panic("rump_init: host process restart required");
    202 	else
    203 		rump_inited = 1;
    204 
    205 	if (rumpuser_getenv("RUMP_VERBOSE", buf, sizeof(buf), &error) == 0) {
    206 		if (*buf != '0')
    207 			boothowto = AB_VERBOSE;
    208 	}
    209 
    210 	rumpuser_gettime(&sec, &nsec, &error);
    211 	boottime.tv_sec = sec;
    212 	boottime.tv_nsec = nsec;
    213 
    214 	initmsgbuf(rump_msgbuf, sizeof(rump_msgbuf));
    215 	aprint_verbose("%s%s", copyright, version);
    216 
    217 	/*
    218 	 * Seed arc4random() with a "reasonable" amount of randomness.
    219 	 * Yes, this is a quick kludge which depends on the arc4random
    220 	 * implementation.
    221 	 */
    222 	messthestack();
    223 	arc4random();
    224 
    225 	if (rump_version != RUMP_VERSION) {
    226 		printf("rump version mismatch, %d vs. %d\n",
    227 		    rump_version, RUMP_VERSION);
    228 		return EPROGMISMATCH;
    229 	}
    230 
    231 	if (rumpuser_getenv("RUMP_THREADS", buf, sizeof(buf), &error) == 0) {
    232 		rump_threads = *buf != '0';
    233 	}
    234 	rumpuser_thrinit(rump_user_schedule, rump_user_unschedule,
    235 	    rump_threads);
    236 	rump_intr_init();
    237 
    238 	/* init minimal lwp/cpu context */
    239 	l = &lwp0;
    240 	l->l_lid = 1;
    241 	l->l_cpu = rump_cpu;
    242 	rumpuser_set_curlwp(l);
    243 
    244 	mutex_init(&tty_lock, MUTEX_DEFAULT, IPL_NONE);
    245 	rumpuser_mutex_recursive_init(&rump_giantlock);
    246 	ksyms_init();
    247 	rumpvm_init();
    248 	evcnt_init();
    249 
    250 	once_init();
    251 	prop_kern_init();
    252 
    253 	pool_subsystem_init();
    254 	kmem_init();
    255 
    256 	uvm_ra_init();
    257 
    258 	mutex_obj_init();
    259 	callout_startup();
    260 
    261 	kprintf_init();
    262 	loginit();
    263 
    264 	kauth_init();
    265 	rump_susercred = rump_cred_create(0, 0, 0, NULL);
    266 
    267 	/* init proc0 and rest of lwp0 now that we can allocate memory */
    268 	p = &proc0;
    269 	p->p_stats = &rump_stats;
    270 	p->p_limit = &rump_limits;
    271 	p->p_pgrp = &rump_pgrp;
    272 	p->p_pid = 0;
    273 	p->p_fd = &rump_filedesc0;
    274 	p->p_vmspace = &rump_vmspace;
    275 	p->p_emul = &emul_rump;
    276 	p->p_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE);
    277 	l->l_cred = rump_cred_suserget();
    278 	l->l_proc = p;
    279 	LIST_INIT(&allproc);
    280 	LIST_INSERT_HEAD(&allproc, &proc0, p_list);
    281 	proc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE);
    282 	lwpinit_specificdata();
    283 
    284 	rump_limits.pl_rlimit[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
    285 	rump_limits.pl_rlimit[RLIMIT_NOFILE].rlim_cur = RLIM_INFINITY;
    286 	rump_limits.pl_rlimit[RLIMIT_SBSIZE].rlim_cur = RLIM_INFINITY;
    287 
    288 	rump_scheduler_init();
    289 	/* revert temporary context and schedule a real context */
    290 	l->l_cpu = NULL;
    291 	rumpuser_set_curlwp(NULL);
    292 	rump_schedule();
    293 
    294 	percpu_init();
    295 	inittimecounter();
    296 	ntp_init();
    297 
    298 	rumpuser_gettime(&sec, &nsec, &error);
    299 	ts.tv_sec = sec;
    300 	ts.tv_nsec = nsec;
    301 	tc_setclock(&ts);
    302 
    303 	/* we are mostly go.  do per-cpu subsystem init */
    304 	for (i = 0; i < ncpu; i++) {
    305 		struct cpu_info *ci = cpu_lookup(i);
    306 
    307 		callout_init_cpu(ci);
    308 		softint_init(ci);
    309 		xc_init_cpu(ci);
    310 		pool_cache_cpu_init(ci);
    311 		selsysinit(ci);
    312 		percpu_init_cpu(ci);
    313 	}
    314 
    315 	sysctl_init();
    316 	kqueue_init();
    317 	iostat_init();
    318 	uid_init();
    319 	fd_sys_init();
    320 	module_init();
    321 	devsw_init();
    322 	pipe_init();
    323 
    324 	rumpuser_dl_bootstrap(add_linkedin_modules, rump_kernelfsym_load);
    325 
    326 	/* these do nothing if not present */
    327 	rump_vfs_init();
    328 	rump_net_init();
    329 	rump_dev_init();
    330 	cold = 0;
    331 
    332 	/* aieeeedondest */
    333 	if (rump_threads) {
    334 		if (workqueue_create(&uvm.aiodone_queue, "aiodoned",
    335 		    rump_aiodone_worker, NULL, 0, 0, WQ_MPSAFE))
    336 			panic("aiodoned");
    337 	}
    338 
    339 	mksysctls();
    340 	sysctl_finalize();
    341 
    342 	module_init_class(MODULE_CLASS_ANY);
    343 
    344 	rumpuser_gethostname(hostname, MAXHOSTNAMELEN, &error);
    345 	hostnamelen = strlen(hostname);
    346 
    347 	sigemptyset(&sigcantmask);
    348 
    349 	lwp0.l_fd = proc0.p_fd = fd_init(&rump_filedesc0);
    350 
    351 	if (rump_threads)
    352 		vmem_rehash_start();
    353 
    354 	rump_unschedule();
    355 
    356 	return 0;
    357 }
    358 
    359 /* maybe support sys_reboot some day for remote shutdown */
    360 void
    361 rump_reboot(int howto)
    362 {
    363 
    364 	/* dump means we really take the dive here */
    365 	if ((howto & RB_DUMP) || panicstr) {
    366 		rumpuser_exit(RUMPUSER_PANIC);
    367 		/*NOTREACHED*/
    368 	}
    369 
    370 	/* try to sync */
    371 	if (!((howto & RB_NOSYNC) || panicstr)) {
    372 		rump_vfs_fini();
    373 	}
    374 
    375 	/* your wish is my command */
    376 	if (howto & RB_HALT) {
    377 		for (;;) {
    378 			uint64_t sec = 5, nsec = 0;
    379 			int error;
    380 
    381 			rumpuser_nanosleep(&sec, &nsec, &error);
    382 		}
    383 	}
    384 	rump_inited = -1;
    385 }
    386 
    387 struct uio *
    388 rump_uio_setup(void *buf, size_t bufsize, off_t offset, enum rump_uiorw rw)
    389 {
    390 	struct uio *uio;
    391 	enum uio_rw uiorw;
    392 
    393 	switch (rw) {
    394 	case RUMPUIO_READ:
    395 		uiorw = UIO_READ;
    396 		break;
    397 	case RUMPUIO_WRITE:
    398 		uiorw = UIO_WRITE;
    399 		break;
    400 	default:
    401 		panic("%s: invalid rw %d", __func__, rw);
    402 	}
    403 
    404 	uio = kmem_alloc(sizeof(struct uio), KM_SLEEP);
    405 	uio->uio_iov = kmem_alloc(sizeof(struct iovec), KM_SLEEP);
    406 
    407 	uio->uio_iov->iov_base = buf;
    408 	uio->uio_iov->iov_len = bufsize;
    409 
    410 	uio->uio_iovcnt = 1;
    411 	uio->uio_offset = offset;
    412 	uio->uio_resid = bufsize;
    413 	uio->uio_rw = uiorw;
    414 	uio->uio_vmspace = UIO_VMSPACE_SYS;
    415 
    416 	return uio;
    417 }
    418 
    419 size_t
    420 rump_uio_getresid(struct uio *uio)
    421 {
    422 
    423 	return uio->uio_resid;
    424 }
    425 
    426 off_t
    427 rump_uio_getoff(struct uio *uio)
    428 {
    429 
    430 	return uio->uio_offset;
    431 }
    432 
    433 size_t
    434 rump_uio_free(struct uio *uio)
    435 {
    436 	size_t resid;
    437 
    438 	resid = uio->uio_resid;
    439 	kmem_free(uio->uio_iov, sizeof(*uio->uio_iov));
    440 	kmem_free(uio, sizeof(*uio));
    441 
    442 	return resid;
    443 }
    444 
    445 static pid_t nextpid = 1;
    446 struct lwp *
    447 rump_newproc_switch()
    448 {
    449 	struct lwp *l;
    450 	pid_t mypid;
    451 
    452 	mypid = atomic_inc_uint_nv(&nextpid);
    453 	if (__predict_false(mypid == 0))
    454 		mypid = atomic_inc_uint_nv(&nextpid);
    455 
    456 	l = rump_lwp_alloc(mypid, 0);
    457 	rump_lwp_switch(l);
    458 
    459 	return l;
    460 }
    461 
    462 struct lwp *
    463 rump_lwp_alloc_and_switch(pid_t pid, lwpid_t lid)
    464 {
    465 	struct lwp *l;
    466 
    467 	l = rump_lwp_alloc(pid, lid);
    468 	rump_lwp_switch(l);
    469 
    470 	return l;
    471 }
    472 
    473 struct lwp *
    474 rump_lwp_alloc(pid_t pid, lwpid_t lid)
    475 {
    476 	struct lwp *l;
    477 	struct proc *p;
    478 
    479 	l = kmem_zalloc(sizeof(*l), KM_SLEEP);
    480 	if (pid != 0) {
    481 		p = kmem_zalloc(sizeof(*p), KM_SLEEP);
    482 		if (rump_proc_vfs_init)
    483 			rump_proc_vfs_init(p);
    484 		p->p_stats = &rump_stats;
    485 		p->p_limit = &rump_limits;
    486 		p->p_pid = pid;
    487 		p->p_vmspace = &rump_vmspace;
    488 		p->p_emul = &emul_rump;
    489 		p->p_fd = fd_init(NULL);
    490 		p->p_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE);
    491 		l->l_cred = rump_cred_suserget();
    492 	} else {
    493 		p = &proc0;
    494 		l->l_cred = rump_susercred;
    495 	}
    496 
    497 	l->l_proc = p;
    498 	l->l_lid = lid;
    499 	l->l_fd = p->p_fd;
    500 	l->l_cpu = NULL;
    501 	lwp_initspecific(l);
    502 	LIST_INSERT_HEAD(&alllwp, l, l_list);
    503 
    504 	return l;
    505 }
    506 
    507 void
    508 rump_lwp_switch(struct lwp *newlwp)
    509 {
    510 	struct lwp *l = curlwp;
    511 
    512 	rumpuser_set_curlwp(NULL);
    513 	newlwp->l_cpu = l->l_cpu;
    514 	newlwp->l_mutex = l->l_mutex;
    515 	l->l_mutex = NULL;
    516 	l->l_cpu = NULL;
    517 	rumpuser_set_curlwp(newlwp);
    518 	if (l->l_flag & LW_WEXIT)
    519 		rump_lwp_free(l);
    520 }
    521 
    522 /* XXX: this has effect only on non-pid0 lwps */
    523 void
    524 rump_lwp_release(struct lwp *l)
    525 {
    526 	struct proc *p;
    527 
    528 	p = l->l_proc;
    529 	if (p->p_pid != 0) {
    530 		mutex_obj_free(p->p_lock);
    531 		fd_free();
    532 		if (rump_proc_vfs_release)
    533 			rump_proc_vfs_release(p);
    534 		rump_cred_put(l->l_cred);
    535 		kmem_free(p, sizeof(*p));
    536 	}
    537 	KASSERT((l->l_flag & LW_WEXIT) == 0);
    538 	l->l_flag |= LW_WEXIT;
    539 }
    540 
    541 void
    542 rump_lwp_free(struct lwp *l)
    543 {
    544 
    545 	KASSERT(l->l_flag & LW_WEXIT);
    546 	KASSERT(l->l_mutex == NULL);
    547 	if (l->l_name)
    548 		kmem_free(l->l_name, MAXCOMLEN);
    549 	lwp_finispecific(l);
    550 	LIST_REMOVE(l, l_list);
    551 	kmem_free(l, sizeof(*l));
    552 }
    553 
    554 struct lwp *
    555 rump_lwp_curlwp(void)
    556 {
    557 	struct lwp *l = curlwp;
    558 
    559 	if (l->l_flag & LW_WEXIT)
    560 		return NULL;
    561 	return l;
    562 }
    563 
    564 /* rump private.  NEEDS WORK! */
    565 void
    566 rump_set_vmspace(struct vmspace *vm)
    567 {
    568 	struct proc *p = curproc;
    569 
    570 	p->p_vmspace = vm;
    571 }
    572 
    573 kauth_cred_t
    574 rump_cred_create(uid_t uid, gid_t gid, size_t ngroups, gid_t *groups)
    575 {
    576 	kauth_cred_t cred;
    577 	int rv;
    578 
    579 	cred = kauth_cred_alloc();
    580 	kauth_cred_setuid(cred, uid);
    581 	kauth_cred_seteuid(cred, uid);
    582 	kauth_cred_setsvuid(cred, uid);
    583 	kauth_cred_setgid(cred, gid);
    584 	kauth_cred_setgid(cred, gid);
    585 	kauth_cred_setegid(cred, gid);
    586 	kauth_cred_setsvgid(cred, gid);
    587 	rv = kauth_cred_setgroups(cred, groups, ngroups, 0, UIO_SYSSPACE);
    588 	/* oh this is silly.  and by "this" I mean kauth_cred_setgroups() */
    589 	assert(rv == 0);
    590 
    591 	return cred;
    592 }
    593 
    594 void
    595 rump_cred_put(kauth_cred_t cred)
    596 {
    597 
    598 	kauth_cred_free(cred);
    599 }
    600 
    601 kauth_cred_t
    602 rump_cred_suserget(void)
    603 {
    604 
    605 	kauth_cred_hold(rump_susercred);
    606 	return rump_susercred;
    607 }
    608 
    609 /*
    610  * Return the next system lwpid
    611  */
    612 lwpid_t
    613 rump_nextlid(void)
    614 {
    615 	lwpid_t retid;
    616 
    617 	mutex_enter(proc0.p_lock);
    618 	/*
    619 	 * Take next one, don't return 0
    620 	 * XXX: most likely we'll have collisions in case this
    621 	 * wraps around.
    622 	 */
    623 	if (++proc0.p_nlwpid == 0)
    624 		++proc0.p_nlwpid;
    625 	retid = proc0.p_nlwpid;
    626 	mutex_exit(proc0.p_lock);
    627 
    628 	return retid;
    629 }
    630 
    631 static int compcounter[RUMP_COMPONENT_MAX];
    632 
    633 static void
    634 rump_component_init_cb(struct rump_component *rc, int type)
    635 {
    636 
    637 	KASSERT(type < RUMP_COMPONENT_MAX);
    638 	if (rc->rc_type == type) {
    639 		rc->rc_init();
    640 		compcounter[type]++;
    641 	}
    642 }
    643 
    644 int
    645 rump_component_count(enum rump_component_type type)
    646 {
    647 
    648 	KASSERT(type <= RUMP_COMPONENT_MAX);
    649 	return compcounter[type];
    650 }
    651 
    652 void
    653 rump_component_init(enum rump_component_type type)
    654 {
    655 
    656 	rumpuser_dl_component_init(type, rump_component_init_cb);
    657 }
    658 
    659 /*
    660  * Initialize a module which has already been loaded and linked
    661  * with dlopen(). This is fundamentally the same as a builtin module.
    662  */
    663 int
    664 rump_module_init(const struct modinfo * const *mip, size_t nmodinfo)
    665 {
    666 
    667 	return module_builtin_add(mip, nmodinfo, true);
    668 }
    669 
    670 /*
    671  * Finish module (flawless victory, fatality!).
    672  */
    673 int
    674 rump_module_fini(const struct modinfo *mi)
    675 {
    676 
    677 	return module_builtin_remove(mi, true);
    678 }
    679 
    680 /*
    681  * Add loaded and linked module to the builtin list.  It will
    682  * later be initialized with module_init_class().
    683  */
    684 
    685 static void
    686 add_linkedin_modules(const struct modinfo * const *mip, size_t nmodinfo)
    687 {
    688 
    689 	module_builtin_add(mip, nmodinfo, false);
    690 }
    691 
    692 int
    693 rump_kernelfsym_load(void *symtab, uint64_t symsize,
    694 	char *strtab, uint64_t strsize)
    695 {
    696 	static int inited = 0;
    697 	Elf64_Ehdr ehdr;
    698 
    699 	if (inited)
    700 		return EBUSY;
    701 	inited = 1;
    702 
    703 	/*
    704 	 * Use 64bit header since it's bigger.  Shouldn't make a
    705 	 * difference, since we're passing in all zeroes anyway.
    706 	 */
    707 	memset(&ehdr, 0, sizeof(ehdr));
    708 	ksyms_addsyms_explicit(&ehdr, symtab, symsize, strtab, strsize);
    709 
    710 	return 0;
    711 }
    712 
    713 static int
    714 rump_sysproxy_local(int num, void *arg, uint8_t *data, size_t dlen,
    715 	register_t *retval)
    716 {
    717 	struct lwp *l;
    718 	struct sysent *callp;
    719 	int rv;
    720 
    721 	if (__predict_false(num >= SYS_NSYSENT))
    722 		return ENOSYS;
    723 
    724 	callp = rump_sysent + num;
    725 	rump_schedule();
    726 	l = curlwp;
    727 	rv = callp->sy_call(l, (void *)data, retval);
    728 	rump_unschedule();
    729 
    730 	return rv;
    731 }
    732 
    733 int
    734 rump_boot_gethowto()
    735 {
    736 
    737 	return boothowto;
    738 }
    739 
    740 void
    741 rump_boot_sethowto(int howto)
    742 {
    743 
    744 	boothowto = howto;
    745 }
    746 
    747 rump_sysproxy_t rump_sysproxy = rump_sysproxy_local;
    748 void *rump_sysproxy_arg;
    749 
    750 /*
    751  * This whole syscall-via-rpc is still taking form.  For example, it
    752  * may be necessary to set syscalls individually instead of lobbing
    753  * them all to the same place.  So don't think this interface is
    754  * set in stone.
    755  */
    756 int
    757 rump_sysproxy_set(rump_sysproxy_t proxy, void *arg)
    758 {
    759 
    760 	if (rump_sysproxy_arg)
    761 		return EBUSY;
    762 
    763 	rump_sysproxy_arg = arg;
    764 	rump_sysproxy = proxy;
    765 
    766 	return 0;
    767 }
    768 
    769 int
    770 rump_getversion(void)
    771 {
    772 
    773 	return __NetBSD_Version__;
    774 }
    775