2 * Copyright (c) 2004 Tim J. Robbins
3 * Copyright (c) 2002 Doug Rabson
4 * Copyright (c) 2000 Marcel Moolenaar
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
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.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include "opt_compat.h"
33 #include "opt_kdtrace.h"
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/imgact.h>
40 #include <sys/mutex.h>
42 #include <sys/racct.h>
43 #include <sys/sched.h>
44 #include <sys/syscallsubr.h>
46 #include <sys/unistd.h>
51 #include <vm/vm_map.h>
54 #include <machine/../linux32/linux.h>
55 #include <machine/../linux32/linux32_proto.h>
57 #include <machine/../linux/linux.h>
58 #include <machine/../linux/linux_proto.h>
60 #include <compat/linux/linux_emul.h>
61 #include <compat/linux/linux_futex.h>
62 #include <compat/linux/linux_misc.h>
63 #include <compat/linux/linux_util.h>
66 linux_fork(struct thread *td, struct linux_fork_args *args)
74 printf(ARGS(fork, ""));
77 if ((error = fork1(td, RFFDG | RFPROC | RFSTOPPED, 0, &p2, NULL, 0))
81 td2 = FIRST_THREAD_IN_PROC(p2);
83 linux_proc_init(td, td2, 0);
85 td->td_retval[0] = p2->p_pid;
88 * Make this runnable after we are finished with it.
92 sched_add(td2, SRQ_BORING);
99 linux_vfork(struct thread *td, struct linux_vfork_args *args)
107 printf(ARGS(vfork, ""));
110 /* Exclude RFPPWAIT */
111 if ((error = fork1(td, RFFDG | RFPROC | RFMEM | RFSTOPPED, 0, &p2,
116 td2 = FIRST_THREAD_IN_PROC(p2);
118 linux_proc_init(td, td2, 0);
121 p2->p_flag |= P_PPWAIT;
124 td->td_retval[0] = p2->p_pid;
127 * Make this runnable after we are finished with it.
131 sched_add(td2, SRQ_BORING);
134 /* wait for the children to exit, ie. emulate vfork */
136 while (p2->p_flag & P_PPWAIT)
137 cv_wait(&p2->p_pwait, &p2->p_mtx);
144 linux_clone_proc(struct thread *td, struct linux_clone_args *args)
146 int error, ff = RFPROC | RFSTOPPED;
150 struct linux_emuldata *em;
154 printf(ARGS(clone, "flags %x, stack %p, parent tid: %p, "
155 "child tid: %p"), (unsigned)args->flags,
156 args->stack, args->parent_tidptr, args->child_tidptr);
160 exit_signal = args->flags & 0x000000ff;
161 if (LINUX_SIG_VALID(exit_signal)) {
162 exit_signal = linux_to_bsd_signal(exit_signal);
163 } else if (exit_signal != 0)
166 if (args->flags & LINUX_CLONE_VM)
168 if (args->flags & LINUX_CLONE_SIGHAND)
171 * XXX: In Linux, sharing of fs info (chroot/cwd/umask)
172 * and open files is independant. In FreeBSD, its in one
173 * structure but in reality it does not cause any problems
174 * because both of these flags are usually set together.
176 if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS)))
179 if (args->flags & LINUX_CLONE_PARENT_SETTID)
180 if (args->parent_tidptr == NULL)
183 error = fork1(td, ff, 0, &p2, NULL, 0);
187 td2 = FIRST_THREAD_IN_PROC(p2);
189 /* create the emuldata */
190 linux_proc_init(td, td2, args->flags);
193 KASSERT(em != NULL, ("clone_proc: emuldata not found.\n"));
195 if (args->flags & LINUX_CLONE_CHILD_SETTID)
196 em->child_set_tid = args->child_tidptr;
198 em->child_set_tid = NULL;
200 if (args->flags & LINUX_CLONE_CHILD_CLEARTID)
201 em->child_clear_tid = args->child_tidptr;
203 em->child_clear_tid = NULL;
205 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
206 error = copyout(&p2->p_pid, args->parent_tidptr,
209 printf(LMSG("copyout failed!"));
213 p2->p_sigparent = exit_signal;
216 * In a case of stack = NULL, we are supposed to COW calling process
217 * stack. This is what normal fork() does, so we just keep tf_rsp arg
220 linux_set_upcall_kse(td2, PTROUT(args->stack));
222 if (args->flags & LINUX_CLONE_SETTLS)
223 linux_set_cloned_tls(td2, args->tls);
227 printf(LMSG("clone: successful rfork to %d, "
228 "stack %p sig = %d"), (int)p2->p_pid, args->stack,
232 if (args->flags & LINUX_CLONE_VFORK) {
234 p2->p_flag |= P_PPWAIT;
239 * Make this runnable after we are finished with it.
243 sched_add(td2, SRQ_BORING);
246 td->td_retval[0] = p2->p_pid;
248 if (args->flags & LINUX_CLONE_VFORK) {
249 /* wait for the children to exit, ie. emulate vfork */
251 while (p2->p_flag & P_PPWAIT)
252 cv_wait(&p2->p_pwait, &p2->p_mtx);
260 linux_clone_thread(struct thread *td, struct linux_clone_args *args)
262 struct linux_emuldata *em;
263 struct thread *newtd;
269 printf(ARGS(clone, "thread: flags %x, stack %p, parent tid: %p, "
270 "child tid: %p"), (unsigned)args->flags,
271 args->stack, args->parent_tidptr, args->child_tidptr);
275 LINUX_CTR4(clone_thread, "thread(%d) flags %x ptid %p ctid %p",
276 td->td_tid, (unsigned)args->flags,
277 args->parent_tidptr, args->child_tidptr);
279 if (args->flags & LINUX_CLONE_PARENT_SETTID)
280 if (args->parent_tidptr == NULL)
283 /* Threads should be created with own stack */
284 if (args->stack == NULL)
289 /* Initialize our td */
290 error = kern_thr_alloc(p, 0, &newtd);
294 cpu_set_upcall(newtd, td);
296 bzero(&newtd->td_startzero,
297 __rangeof(struct thread, td_startzero, td_endzero));
298 bcopy(&td->td_startcopy, &newtd->td_startcopy,
299 __rangeof(struct thread, td_startcopy, td_endcopy));
302 newtd->td_ucred = crhold(td->td_ucred);
304 /* create the emuldata */
305 linux_proc_init(td, newtd, args->flags);
308 KASSERT(em != NULL, ("clone_thread: emuldata not found.\n"));
310 if (args->flags & LINUX_CLONE_SETTLS)
311 linux_set_cloned_tls(newtd, args->tls);
313 if (args->flags & LINUX_CLONE_CHILD_SETTID)
314 em->child_set_tid = args->child_tidptr;
316 em->child_set_tid = NULL;
318 if (args->flags & LINUX_CLONE_CHILD_CLEARTID)
319 em->child_clear_tid = args->child_tidptr;
321 em->child_clear_tid = NULL;
323 cpu_thread_clean(newtd);
325 linux_set_upcall_kse(newtd, PTROUT(args->stack));
328 p->p_flag |= P_HADTHREADS;
329 bcopy(p->p_comm, newtd->td_name, sizeof(newtd->td_name));
331 if (args->flags & LINUX_CLONE_PARENT)
332 thread_link(newtd, p->p_pptr);
334 thread_link(newtd, p);
337 /* let the scheduler know about these things. */
338 sched_fork_thread(td, newtd);
341 newtd->td_flags |= TDF_ASTPENDING | TDF_NEEDSUSPCHK;
348 printf(ARGS(clone, "successful clone to %d, stack %p"),
349 (int)newtd->td_tid, args->stack);
352 LINUX_CTR2(clone_thread, "thread(%d) successful clone to %d",
353 td->td_tid, newtd->td_tid);
355 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
356 error = copyout(&newtd->td_tid, args->parent_tidptr,
357 sizeof(newtd->td_tid));
359 printf(LMSG("clone_thread: copyout failed!"));
363 * Make this runnable after we are finished with it.
366 TD_SET_CAN_RUN(newtd);
367 sched_add(newtd, SRQ_BORING);
368 thread_unlock(newtd);
370 td->td_retval[0] = newtd->td_tid;
376 linux_clone(struct thread *td, struct linux_clone_args *args)
379 if (args->flags & LINUX_CLONE_THREAD)
380 return (linux_clone_thread(td, args));
382 return (linux_clone_proc(td, args));
386 linux_exit(struct thread *td, struct linux_exit_args *args)
388 struct linux_emuldata *em;
391 KASSERT(em != NULL, ("exit: emuldata not found.\n"));
393 LINUX_CTR2(exit, "thread(%d) (%d)", em->em_tid, args->rval);
395 linux_thread_detach(td);
398 * XXX. When the last two threads of a process
399 * exit via pthread_exit() try thr_exit() first.
402 exit1(td, W_EXITCODE(args->rval, 0));
407 linux_set_tid_address(struct thread *td, struct linux_set_tid_address_args *args)
409 struct linux_emuldata *em;
412 KASSERT(em != NULL, ("set_tid_address: emuldata not found.\n"));
414 em->child_clear_tid = args->tidptr;
416 td->td_retval[0] = em->em_tid;
418 LINUX_CTR3(set_tid_address, "tidptr(%d) %p, returns %d",
419 em->em_tid, args->tidptr, td->td_retval[0]);
425 linux_thread_detach(struct thread *td)
427 struct linux_sys_futex_args cup;
428 struct linux_emuldata *em;
429 int *child_clear_tid;
433 KASSERT(em != NULL, ("thread_detach: emuldata not found.\n"));
435 LINUX_CTR1(thread_detach, "thread(%d)", em->em_tid);
437 release_futexes(td, em);
439 child_clear_tid = em->child_clear_tid;
441 if (child_clear_tid != NULL) {
443 LINUX_CTR2(thread_detach, "thread(%d) %p",
444 em->em_tid, child_clear_tid);
446 error = suword32(child_clear_tid, 0);
450 cup.uaddr = child_clear_tid;
451 cup.op = LINUX_FUTEX_WAKE;
452 cup.val = 1; /* wake one */
456 error = linux_sys_futex(td, &cup);
458 * this cannot happen at the moment and if this happens it
459 * probably means there is a user space bug
462 linux_msg(td, "futex stuff in thread_detach failed.");