1 /* $NetBSD: rump.c,v 1.361 2023/10/05 19:41:07 ad Exp $ */
2
3 /*
4 * Copyright (c) 2007-2011 Antti Kantee. All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: rump.c,v 1.361 2023/10/05 19:41:07 ad Exp $");
30
31 #include <sys/systm.h>
32 #define ELFSIZE ARCH_ELFSIZE
33
34 #include <sys/param.h>
35 #include <sys/atomic.h>
36 #include <sys/buf.h>
37 #include <sys/callout.h>
38 #include <sys/conf.h>
39 #include <sys/cpu.h>
40 #include <sys/device.h>
41 #include <sys/device_impl.h>
42 #include <sys/evcnt.h>
43 #include <sys/event.h>
44 #include <sys/exec_elf.h>
45 #include <sys/filedesc.h>
46 #include <sys/iostat.h>
47 #include <sys/kauth.h>
48 #include <sys/kcpuset.h>
49 #include <sys/kernel.h>
50 #include <sys/kmem.h>
51 #include <sys/kprintf.h>
52 #include <sys/kthread.h>
53 #include <sys/ksyms.h>
54 #include <sys/msgbuf.h>
55 #include <sys/module.h>
56 #include <sys/module_hook.h>
57 #include <sys/namei.h>
58 #include <sys/once.h>
59 #include <sys/percpu.h>
60 #include <sys/pipe.h>
61 #include <sys/pool.h>
62 #include <sys/queue.h>
63 #include <sys/reboot.h>
64 #include <sys/resourcevar.h>
65 #include <sys/select.h>
66 #include <sys/sysctl.h>
67 #include <sys/syscall.h>
68 #include <sys/syscallvar.h>
69 #include <sys/threadpool.h>
70 #include <sys/timetc.h>
71 #include <sys/tty.h>
72 #include <sys/uidinfo.h>
73 #include <sys/vmem.h>
74 #include <sys/xcall.h>
75 #include <sys/cprng.h>
76 #include <sys/rnd.h>
77 #include <sys/ktrace.h>
78 #include <sys/pserialize.h>
79 #include <sys/psref.h>
80
81 #include <rump-sys/kern.h>
82 #include <rump-sys/dev.h>
83 #include <rump-sys/net.h>
84 #include <rump-sys/vfs.h>
85
86 #include <rump/rumpuser.h>
87
88 #include <prop/proplib.h>
89
90 #include <uvm/uvm_extern.h>
91 #include <uvm/uvm_readahead.h>
92
93 char machine[] = MACHINE;
94 char machine_arch[] = MACHINE_ARCH;
95
96 struct proc *initproc;
97
98 struct device rump_rootdev = {
99 .dv_class = DV_VIRTUAL
100 };
101
102 #ifdef RUMP_WITHOUT_THREADS
103 int rump_threads = 0;
104 #else
105 int rump_threads = 1;
106 #endif
107
108 static void rump_component_addlocal(void);
109 static struct lwp *bootlwp;
110
111 /* 16k should be enough for std rump needs */
112 static char rump_msgbuf[16*1024] __aligned(256);
113
114 bool rump_ttycomponent = false;
115
116 extern pool_cache_t pnbuf_cache;
117
118 static int rump_inited;
119
120 void (*rump_vfs_drainbufs)(int) = (void *)nullop;
121 int (*rump_vfs_makeonedevnode)(dev_t, const char *,
122 devmajor_t, devminor_t) = (void *)nullop;
123 int (*rump_vfs_makedevnodes)(dev_t, const char *, char,
124 devmajor_t, devminor_t, int) = (void *)nullop;
125 int (*rump_vfs_makesymlink)(const char *, const char *) = (void *)nullop;
126
127 rump_proc_vfs_init_fn rump_proc_vfs_init = (void *)nullop;
128 rump_proc_vfs_release_fn rump_proc_vfs_release = (void *)nullop;
129
130 static void add_linkedin_modules(const struct modinfo *const *, size_t);
131 static void add_static_evcnt(struct evcnt *);
132
rspo_wrap_getpid(void)133 static pid_t rspo_wrap_getpid(void) {
134 return rump_sysproxy_hyp_getpid();
135 }
rspo_wrap_syscall(int num,void * arg,long * retval)136 static int rspo_wrap_syscall(int num, void *arg, long *retval) {
137 return rump_sysproxy_hyp_syscall(num, arg, retval);
138 }
rspo_wrap_rfork(void * priv,int flag,const char * comm)139 static int rspo_wrap_rfork(void *priv, int flag, const char *comm) {
140 return rump_sysproxy_hyp_rfork(priv, flag, comm);
141 }
rspo_wrap_lwpexit(void)142 static void rspo_wrap_lwpexit(void) {
143 rump_sysproxy_hyp_lwpexit();
144 }
rspo_wrap_execnotify(const char * comm)145 static void rspo_wrap_execnotify(const char *comm) {
146 rump_sysproxy_hyp_execnotify(comm);
147 }
148 static const struct rumpuser_hyperup hyp = {
149 .hyp_schedule = rump_schedule,
150 .hyp_unschedule = rump_unschedule,
151 .hyp_backend_unschedule = rump_user_unschedule,
152 .hyp_backend_schedule = rump_user_schedule,
153 .hyp_lwproc_switch = rump_lwproc_switch,
154 .hyp_lwproc_release = rump_lwproc_releaselwp,
155 .hyp_lwproc_newlwp = rump_lwproc_newlwp,
156 .hyp_lwproc_curlwp = rump_lwproc_curlwp,
157
158 .hyp_getpid = rspo_wrap_getpid,
159 .hyp_syscall = rspo_wrap_syscall,
160 .hyp_lwproc_rfork = rspo_wrap_rfork,
161 .hyp_lwpexit = rspo_wrap_lwpexit,
162 .hyp_execnotify = rspo_wrap_execnotify,
163 };
164 struct rump_sysproxy_ops rump_sysproxy_ops = {
165 .rspo_copyin = (void *)enxio,
166 .rspo_copyinstr = (void *)enxio,
167 .rspo_copyout = (void *)enxio,
168 .rspo_copyoutstr = (void *)enxio,
169 .rspo_anonmmap = (void *)enxio,
170 .rspo_raise = (void *)enxio,
171 .rspo_fini = (void *)enxio,
172 .rspo_hyp_getpid = (void *)enxio,
173 .rspo_hyp_syscall = (void *)enxio,
174 .rspo_hyp_rfork = (void *)enxio,
175 .rspo_hyp_lwpexit = (void *)enxio,
176 .rspo_hyp_execnotify = (void *)enxio,
177 };
178
179 int
rump_daemonize_begin(void)180 rump_daemonize_begin(void)
181 {
182
183 if (rump_inited)
184 return EALREADY;
185
186 return rumpuser_daemonize_begin();
187 }
188
189 int
rump_daemonize_done(int error)190 rump_daemonize_done(int error)
191 {
192
193 return rumpuser_daemonize_done(error);
194 }
195
196 #ifdef RUMP_USE_CTOR
197
198 /* sysctl bootstrap handling */
199 struct sysctl_boot_chain sysctl_boot_chain \
200 = LIST_HEAD_INITIALIZER(sysctl_boot_chain);
201 __link_set_add_text(sysctl_funcs,voidop); /* ensure linkset is non-empty */
202
203 #else /* RUMP_USE_CTOR */
204
RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)205 RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT)
206 {
207 __link_set_decl(rump_components, struct rump_component);
208
209 /*
210 * Trick compiler into generating references so that statically
211 * linked rump kernels are generated with the link set symbols.
212 */
213 asm("" :: "r"(__start_link_set_rump_components));
214 asm("" :: "r"(__stop_link_set_rump_components));
215 }
216
217 #endif /* RUMP_USE_CTOR */
218
219 int
rump_init_callback(void (* cpuinit_callback)(void))220 rump_init_callback(void (*cpuinit_callback) (void))
221 {
222 char buf[256];
223 struct timespec bts;
224 int64_t sec;
225 long nsec;
226 struct lwp *l, *initlwp;
227 int i, numcpu;
228
229 /* not reentrant */
230 if (rump_inited)
231 return 0;
232 else if (rump_inited == -1)
233 panic("%s: host process restart required", __func__);
234 else
235 rump_inited = 1;
236
237 /* initialize hypervisor */
238 if (rumpuser_init(RUMPUSER_VERSION, &hyp) != 0) {
239 rumpuser_dprintf("rumpuser init failed\n");
240 return EINVAL;
241 }
242
243 /* init minimal lwp/cpu context */
244 rump_lwproc_init();
245 l = &lwp0;
246 l->l_cpu = l->l_target_cpu = &rump_bootcpu;
247 rump_lwproc_curlwp_set(l);
248
249 /* retrieve env vars which affect the early stage of bootstrap */
250 if (rumpuser_getparam("RUMP_THREADS", buf, sizeof(buf)) == 0) {
251 rump_threads = *buf != '0';
252 }
253 if (rumpuser_getparam("RUMP_VERBOSE", buf, sizeof(buf)) == 0) {
254 if (*buf != '0')
255 boothowto = AB_VERBOSE;
256 }
257
258 if (rumpuser_getparam(RUMPUSER_PARAM_NCPU, buf, sizeof(buf)) != 0)
259 panic("%s: mandatory hypervisor configuration (NCPU) missing",
260 __func__);
261 numcpu = strtoll(buf, NULL, 10);
262 if (numcpu < 1) {
263 panic("%s: rump kernels are not lightweight enough for %d CPUs",
264 __func__, numcpu);
265 }
266
267 rump_thread_init();
268 rump_cpus_bootstrap(&numcpu);
269
270 rumpuser_clock_gettime(RUMPUSER_CLOCK_RELWALL, &sec, &nsec);
271 bts.tv_sec = sec;
272 bts.tv_nsec = nsec;
273
274 initmsgbuf(rump_msgbuf, sizeof(rump_msgbuf));
275 aprint_verbose("%s%s", copyright, version);
276
277 rump_intr_init(numcpu);
278
279 rump_tsleep_init();
280
281 rumpuser_mutex_init(&rump_giantlock, RUMPUSER_MTX_SPIN);
282 ksyms_init();
283 uvm_init();
284 evcnt_init();
285
286 kcpuset_sysinit();
287 once_init();
288 kernconfig_lock_init();
289 prop_kern_init();
290
291 kmem_init();
292
293 uvm_ra_init();
294 uao_init();
295
296 callout_startup();
297
298 kprintf_init();
299 percpu_init();
300 pserialize_init();
301
302 kauth_init();
303
304 secmodel_init();
305 sysctl_init();
306 /*
307 * The above call to sysctl_init() only initializes sysctl nodes
308 * from link sets. Initialize sysctls in case we used ctors.
309 */
310 #ifdef RUMP_USE_CTOR
311 {
312 struct sysctl_setup_chain *ssc;
313
314 while ((ssc = LIST_FIRST(&sysctl_boot_chain)) != NULL) {
315 LIST_REMOVE(ssc, ssc_entries);
316 ssc->ssc_func(NULL);
317 }
318 }
319 #endif /* RUMP_USE_CTOR */
320
321 rnd_init();
322 rump_hyperentropy_init();
323
324 procinit();
325 proc0_init();
326 uid_init();
327 chgproccnt(0, 1);
328
329 l->l_proc = &proc0;
330 l->l_cred = kauth_cred_hold(l->l_proc->p_cred);
331
332 lwpinit_specificdata();
333 lwp_initspecific(&lwp0);
334
335 /* Must be called after lwpinit_specificdata */
336 psref_init();
337
338 threadpools_init();
339
340 loginit();
341
342 rump_biglock_init();
343
344 rump_scheduler_init(numcpu);
345 /* revert temporary context and schedule a semireal context */
346 rump_lwproc_curlwp_clear(l);
347 initproc = &proc0; /* borrow proc0 before we get initproc started */
348 rump_schedule();
349 bootlwp = curlwp;
350
351 inittimecounter();
352 ntp_init();
353
354 #ifdef KTRACE
355 ktrinit();
356 #endif
357
358 tc_setclock(&bts);
359
360 extern krwlock_t exec_lock;
361 rw_init(&exec_lock);
362
363 /* we are mostly go. do per-cpu subsystem init */
364 for (i = 0; i < numcpu; i++) {
365 struct cpu_info *ci = cpu_lookup(i);
366
367 /* attach non-bootstrap CPUs */
368 if (i > 0) {
369 rump_cpu_attach(ci);
370 ncpu++;
371 }
372 snprintf(ci->ci_cpuname, sizeof ci->ci_cpuname, "cpu%d", i);
373
374 callout_init_cpu(ci);
375 softint_init(ci);
376 xc_init_cpu(ci);
377 pool_cache_cpu_init(ci);
378 selsysinit(ci);
379 percpu_init_cpu(ci);
380
381 TAILQ_INIT(&ci->ci_data.cpu_ld_locks);
382 __cpu_simple_lock_init(&ci->ci_data.cpu_ld_lock);
383
384 aprint_verbose("cpu%d at thinair0: rump virtual cpu\n", i);
385 }
386 ncpuonline = ncpu;
387
388 /* Once all CPUs are detected, initialize the per-CPU cprng_fast. */
389 cprng_init();
390 cprng_fast_init();
391
392 mp_online = true;
393
394 if (cpuinit_callback)
395 (*cpuinit_callback)();
396
397 /* CPUs are up. allow kernel threads to run */
398 rump_thread_allow(NULL);
399
400 rnd_init_softint();
401
402 kqueue_init();
403 iostat_init();
404 fd_sys_init();
405 module_init();
406 module_hook_init();
407 devsw_init();
408 pipe_init();
409 resource_init();
410 procinit_sysctl();
411 time_init();
412 config_init();
413
414 /* start page baroness */
415 if (rump_threads) {
416 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL,
417 uvm_pageout, NULL, &uvm.pagedaemon_lwp, "pdaemon") != 0)
418 panic("%s: pagedaemon create failed", __func__);
419 } else
420 uvm.pagedaemon_lwp = NULL; /* doesn't match curlwp */
421
422 /* process dso's */
423 rumpuser_dl_bootstrap(add_linkedin_modules,
424 rump_kernelfsym_load, rump_component_load, add_static_evcnt);
425
426 rump_component_addlocal();
427 rump_component_init(RUMP_COMPONENT_KERN);
428
429 /* initialize factions, if present */
430 rump_component_init(RUMP__FACTION_VFS);
431 /* pnbuf_cache is used even without vfs */
432 if (rump_component_count(RUMP__FACTION_VFS) == 0) {
433 pnbuf_cache = pool_cache_init(MAXPATHLEN, 0, 0, 0, "pnbufpl",
434 NULL, IPL_NONE, NULL, NULL, NULL);
435 }
436 rump_component_init(RUMP__FACTION_NET);
437 rump_component_init(RUMP__FACTION_DEV);
438 KASSERT(rump_component_count(RUMP__FACTION_VFS) <= 1
439 && rump_component_count(RUMP__FACTION_NET) <= 1
440 && rump_component_count(RUMP__FACTION_DEV) <= 1);
441
442 rump_component_init(RUMP_COMPONENT_KERN_VFS);
443
444 /*
445 * if we initialized the tty component above, the tyttymtx is
446 * now initialized. otherwise, we need to initialize it.
447 */
448 if (!rump_ttycomponent)
449 mutex_init(&tty_lock, MUTEX_DEFAULT, IPL_VM);
450
451 cold = 0;
452
453 sysctl_finalize();
454
455 module_init_class(MODULE_CLASS_ANY);
456
457 if (rumpuser_getparam(RUMPUSER_PARAM_HOSTNAME,
458 hostname, MAXHOSTNAMELEN) != 0) {
459 panic(
460 "%s: mandatory hypervisor configuration (HOSTNAME) missing",
461 __func__);
462 }
463 hostnamelen = strlen(hostname);
464
465 sigemptyset(&sigcantmask);
466
467 if (rump_threads)
468 vmem_rehash_start();
469
470 /*
471 * Create init (proc 1), used to attach implicit threads in rump.
472 * (note: must be done after vfsinit to get cwdi)
473 */
474 initlwp = rump__lwproc_alloclwp(NULL);
475 mutex_enter(&proc_lock);
476 initproc = proc_find_raw(1);
477 mutex_exit(&proc_lock);
478 if (initproc == NULL)
479 panic("%s: where in the world is initproc?", __func__);
480 strlcpy(initproc->p_comm, "rumplocal", sizeof(initproc->p_comm));
481
482 rump_component_init(RUMP_COMPONENT_POSTINIT);
483
484 /* load syscalls */
485 rump_component_init(RUMP_COMPONENT_SYSCALL);
486
487 /* component inits done */
488 bootlwp = NULL;
489
490 /* open 0/1/2 for init */
491 KASSERT(rump_lwproc_curlwp() == NULL);
492 rump_lwproc_switch(initlwp);
493 rump_consdev_init();
494 rump_lwproc_switch(NULL);
495
496 /* release cpu */
497 rump_unschedule();
498
499 return 0;
500 }
501
502 int
rump_init(void)503 rump_init(void)
504 {
505 return rump_init_callback(NULL);
506 }
507
508 /* historic compat */
509 __strong_alias(rump__init,rump_init);
510
511 static int compcounter[RUMP_COMPONENT_MAX];
512 static int compinited[RUMP_COMPONENT_MAX];
513
514 /*
515 * Yea, this is O(n^2), but we're only looking at a handful of components.
516 * Components are always initialized from the thread that called rump_init().
517 */
518 static LIST_HEAD(, rump_component) rchead = LIST_HEAD_INITIALIZER(rchead);
519
520 #ifdef RUMP_USE_CTOR
521 struct modinfo_boot_chain modinfo_boot_chain \
522 = LIST_HEAD_INITIALIZER(modinfo_boot_chain);
523
524 static void
rump_component_addlocal(void)525 rump_component_addlocal(void)
526 {
527 struct modinfo_chain *mc;
528
529 while ((mc = LIST_FIRST(&modinfo_boot_chain)) != NULL) {
530 LIST_REMOVE(mc, mc_entries);
531 module_builtin_add(&mc->mc_info, 1, false);
532 }
533 }
534
535 #else /* RUMP_USE_CTOR */
536
537 static void
rump_component_addlocal(void)538 rump_component_addlocal(void)
539 {
540 __link_set_decl(rump_components, struct rump_component);
541 struct rump_component *const *rc;
542
543 __link_set_foreach(rc, rump_components) {
544 rump_component_load(*rc);
545 }
546 }
547 #endif /* RUMP_USE_CTOR */
548
549 void
rump_component_load(const struct rump_component * rc_const)550 rump_component_load(const struct rump_component *rc_const)
551 {
552 struct rump_component *rc, *rc_iter;
553
554 /* time for rump component loading and unloading has passed */
555 if (!cold)
556 return;
557
558 /*
559 * XXX: this is ok since the "const" was removed from the
560 * definition of RUMP_COMPONENT().
561 *
562 * However, to preserve the hypercall interface, the const
563 * remains here. This can be fixed in the next hypercall revision.
564 */
565 rc = __UNCONST(rc_const);
566
567 KASSERT(!rump_inited || curlwp == bootlwp);
568
569 LIST_FOREACH(rc_iter, &rchead, rc_entries) {
570 if (rc_iter == rc)
571 return;
572 }
573
574 LIST_INSERT_HEAD(&rchead, rc, rc_entries);
575 KASSERT(rc->rc_type < RUMP_COMPONENT_MAX);
576 compcounter[rc->rc_type]++;
577 }
578
579 void
rump_component_unload(struct rump_component * rc)580 rump_component_unload(struct rump_component *rc)
581 {
582
583 /*
584 * Checking for cold is enough because rump_init() both
585 * flips it and handles component loading.
586 */
587 if (!cold)
588 return;
589
590 LIST_REMOVE(rc, rc_entries);
591 }
592
593 int
rump_component_count(enum rump_component_type type)594 rump_component_count(enum rump_component_type type)
595 {
596
597 KASSERT(curlwp == bootlwp);
598 KASSERT(type < RUMP_COMPONENT_MAX);
599 return compcounter[type];
600 }
601
602 void
rump_component_init(enum rump_component_type type)603 rump_component_init(enum rump_component_type type)
604 {
605 struct rump_component *rc, *rc_next, rc_marker;
606
607 KASSERT(curlwp == bootlwp);
608 KASSERT(!compinited[type]);
609
610 rc_marker.rc_type = RUMP_COMPONENT_MAX;
611 rc_marker.rc_init = NULL;
612 for (rc = LIST_FIRST(&rchead); rc != NULL; rc = rc_next) {
613 if (rc->rc_type == type) {
614 LIST_INSERT_AFTER(rc, &rc_marker, rc_entries);
615 rc->rc_init();
616 LIST_REMOVE(rc, rc_entries);
617 rc_next = LIST_NEXT(&rc_marker, rc_entries);
618 LIST_REMOVE(&rc_marker, rc_entries);
619 } else {
620 rc_next = LIST_NEXT(rc, rc_entries);
621 }
622 }
623 compinited[type] = 1;
624 }
625
626 /*
627 * Initialize a module which has already been loaded and linked
628 * with dlopen(). This is fundamentally the same as a builtin module.
629 *
630 * XXX: this interface does not really work in the RUMP_USE_CTOR case,
631 * but I'm not sure it's anything to cry about. In feeling blue,
632 * things could somehow be handled via modinfo_boot_chain.
633 */
634 int
rump_module_init(const struct modinfo * const * mip,size_t nmodinfo)635 rump_module_init(const struct modinfo * const *mip, size_t nmodinfo)
636 {
637
638 return module_builtin_add(mip, nmodinfo, true);
639 }
640
641 /*
642 * Finish module (flawless victory, fatality!).
643 */
644 int
rump_module_fini(const struct modinfo * mi)645 rump_module_fini(const struct modinfo *mi)
646 {
647
648 return module_builtin_remove(mi, true);
649 }
650
651 /*
652 * Add loaded and linked module to the builtin list. It will
653 * later be initialized with module_init_class().
654 */
655
656 static void
add_linkedin_modules(const struct modinfo * const * mip,size_t nmodinfo)657 add_linkedin_modules(const struct modinfo * const *mip, size_t nmodinfo)
658 {
659
660 module_builtin_add(mip, nmodinfo, false);
661 }
662
663 /*
664 * Add an evcnt.
665 */
666 static void
add_static_evcnt(struct evcnt * ev)667 add_static_evcnt(struct evcnt *ev)
668 {
669
670 evcnt_attach_static(ev);
671 }
672
673 int
rump_kernelfsym_load(void * symtab,uint64_t symsize,char * strtab,uint64_t strsize)674 rump_kernelfsym_load(void *symtab, uint64_t symsize,
675 char *strtab, uint64_t strsize)
676 {
677 static int inited = 0;
678 Elf64_Ehdr ehdr;
679
680 if (inited)
681 return EBUSY;
682 inited = 1;
683
684 /*
685 * Use 64bit header since it's bigger. Shouldn't make a
686 * difference, since we're passing in all zeroes anyway.
687 */
688 memset(&ehdr, 0, sizeof(ehdr));
689 ksyms_addsyms_explicit(&ehdr, symtab, symsize, strtab, strsize);
690
691 return 0;
692 }
693
694 int
rump_boot_gethowto()695 rump_boot_gethowto()
696 {
697
698 return boothowto;
699 }
700
701 void
rump_boot_sethowto(int howto)702 rump_boot_sethowto(int howto)
703 {
704
705 boothowto = howto;
706 }
707
708 int
rump_getversion(void)709 rump_getversion(void)
710 {
711
712 return __NetBSD_Version__;
713 }
714 /* compat */
715 __strong_alias(rump_pub_getversion,rump_getversion);
716
717 /*
718 * Note: may be called unscheduled. Not fully safe since no locking
719 * of allevents (currently that's not even available).
720 */
721 void
rump_printevcnts()722 rump_printevcnts()
723 {
724 struct evcnt *ev;
725
726 TAILQ_FOREACH(ev, &allevents, ev_list)
727 rumpuser_dprintf("%s / %s: %" PRIu64 "\n",
728 ev->ev_group, ev->ev_name, ev->ev_count);
729 }
730
731 /*
732 * If you use this interface ... well ... all bets are off.
733 * The original purpose is for the p2k fs server library to be
734 * able to use the same pid/lid for VOPs as the host kernel.
735 */
736 void
rump_allbetsareoff_setid(pid_t pid,int lid)737 rump_allbetsareoff_setid(pid_t pid, int lid)
738 {
739 struct lwp *l = curlwp;
740 struct proc *p = l->l_proc;
741
742 l->l_lid = lid;
743 p->p_pid = pid;
744 }
745
746 static void
ipiemu(void * a1,void * a2)747 ipiemu(void *a1, void *a2)
748 {
749
750 xc__highpri_intr(NULL);
751 }
752
753 void
rump_xc_highpri(struct cpu_info * ci)754 rump_xc_highpri(struct cpu_info *ci)
755 {
756
757 if (ci)
758 xc_unicast(0, ipiemu, NULL, NULL, ci);
759 else
760 xc_broadcast(0, ipiemu, NULL, NULL);
761 }
762
763 int
rump_syscall(int num,void * data,size_t dlen,register_t * retval)764 rump_syscall(int num, void *data, size_t dlen, register_t *retval)
765 {
766 struct proc *p;
767 struct emul *e;
768 struct sysent *callp;
769 const int *etrans = NULL;
770 int rv;
771
772 rump_schedule();
773 p = curproc;
774 e = p->p_emul;
775 #ifndef __HAVE_MINIMAL_EMUL
776 num &= e->e_nsysent - 1;
777 #else
778 num &= SYS_NSYSENT - 1;
779 #endif
780 callp = e->e_sysent + num;
781
782 rv = sy_invoke(callp, curlwp, data, retval, num);
783
784 /*
785 * I hope that (!__HAVE_MINIMAL_EMUL || __HAVE_SYSCALL_INTERN) is
786 * an invariant ...
787 */
788 #if !defined(__HAVE_MINIMAL_EMUL)
789 etrans = e->e_errno;
790 #elif defined(__HAVE_SYSCALL_INTERN)
791 etrans = p->p_emuldata;
792 #endif
793
794 if (etrans) {
795 rv = etrans[rv];
796 /*
797 * XXX: small hack since Linux etrans vectors on some
798 * archs contain negative errnos, but rump_syscalls
799 * uses the -1 + errno ABI. Note that these
800 * negative values are always the result of translation,
801 * otherwise the above translation method would not
802 * work very well.
803 */
804 if (rv < 0)
805 rv = -rv;
806 }
807 rump_unschedule();
808
809 return rv;
810 }
811
812 void
rump_syscall_boot_establish(const struct rump_onesyscall * calls,size_t ncall)813 rump_syscall_boot_establish(const struct rump_onesyscall *calls, size_t ncall)
814 {
815 struct sysent *callp;
816 size_t i;
817
818 for (i = 0; i < ncall; i++) {
819 callp = rump_sysent + calls[i].ros_num;
820 KASSERT(bootlwp != NULL
821 && callp->sy_call == (sy_call_t *)(void *)enosys);
822 callp->sy_call = calls[i].ros_handler;
823 }
824 }
825
826 struct rump_boot_etfs *ebstart;
827 void
rump_boot_etfs_register(struct rump_boot_etfs * eb)828 rump_boot_etfs_register(struct rump_boot_etfs *eb)
829 {
830
831 /*
832 * Could use atomics, but, since caller would need to synchronize
833 * against calling rump_init() anyway, easier to just specify the
834 * interface as "caller serializes". This solve-by-specification
835 * approach avoids the grey area of using atomics before rump_init()
836 * runs.
837 */
838 eb->_eb_next = ebstart;
839 eb->eb_status = -1;
840 ebstart = eb;
841 }
842