2 * Copyright (c) 2000 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
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 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
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.
28 * $FreeBSD: src/sys/i386/linux/linux_machdep.c,v 1.6.2.4 2001/11/05 19:08:23 marcel Exp $
29 * $DragonFly: src/sys/emulation/linux/i386/linux_machdep.c,v 1.23 2007/07/30 17:41:23 pavalos Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/imgact.h>
35 #include <sys/kern_syscall.h>
38 #include <sys/nlookup.h>
41 #include <sys/resource.h>
42 #include <sys/resourcevar.h>
43 #include <sys/ptrace.h>
44 #include <sys/sysproto.h>
45 #include <sys/thread2.h>
46 #include <sys/unistd.h>
49 #include <machine/frame.h>
50 #include <machine/psl.h>
51 #include <machine/segments.h>
52 #include <machine/sysarch.h>
56 #include <vm/vm_map.h>
58 #include <sys/mplock2.h>
61 #include "linux_proto.h"
62 #include "../linux_ipc.h"
63 #include "../linux_signal.h"
64 #include "../linux_util.h"
65 #include "../linux_emuldata.h"
73 l_uint read_exec_only:1;
74 l_uint limit_in_pages:1;
75 l_uint seg_not_present:1;
79 struct l_old_select_argv {
84 struct l_timeval *timeout;
88 linux_to_bsd_sigaltstack(int lsa)
92 if (lsa & LINUX_SS_DISABLE)
94 if (lsa & LINUX_SS_ONSTACK)
100 bsd_to_linux_sigaltstack(int bsa)
104 if (bsa & SS_DISABLE)
105 lsa |= LINUX_SS_DISABLE;
106 if (bsa & SS_ONSTACK)
107 lsa |= LINUX_SS_ONSTACK;
115 sys_linux_execve(struct linux_execve_args *args)
117 struct nlookupdata nd;
118 struct image_args exec_args;
122 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
127 kprintf(ARGS(execve, "%s"), path);
130 error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
131 bzero(&exec_args, sizeof(exec_args));
133 error = exec_copyin_args(&exec_args, path, PATH_SYSSPACE,
134 args->argp, args->envp);
137 error = kern_execve(&nd, &exec_args);
141 * The syscall result is returned in registers to the new program.
142 * Linux will register %edx as an atexit function and we must be
143 * sure to set it to 0. XXX
146 args->sysmsg_result64 = 0;
147 if (curproc->p_sysent == &elf_linux_sysvec)
148 error = emuldata_init(curproc, NULL, 0);
151 exec_free_args(&exec_args);
152 linux_free_path(&path);
155 /* We hit a lethal error condition. Let's die now. */
156 exit1(W_EXITCODE(0, SIGABRT));
164 struct l_ipc_kludge {
165 struct l_msgbuf *msgp;
173 sys_linux_ipc(struct linux_ipc_args *args)
179 switch (args->what & 0xFFFF) {
181 struct linux_semop_args a;
183 a.semid = args->arg1;
185 a.nsops = args->arg2;
186 a.sysmsg_lresult = 0;
187 error = linux_semop(&a);
188 args->sysmsg_lresult = a.sysmsg_lresult;
192 struct linux_semget_args a;
195 a.nsems = args->arg2;
196 a.semflg = args->arg3;
197 a.sysmsg_lresult = 0;
198 error = linux_semget(&a);
199 args->sysmsg_lresult = a.sysmsg_lresult;
203 struct linux_semctl_args a;
206 a.semid = args->arg1;
207 a.semnum = args->arg2;
209 a.sysmsg_lresult = 0;
210 error = copyin((caddr_t)args->ptr, &a.arg, sizeof(a.arg));
213 error = linux_semctl(&a);
214 args->sysmsg_lresult = a.sysmsg_lresult;
218 struct linux_msgsnd_args a;
220 a.msqid = args->arg1;
222 a.msgsz = args->arg2;
223 a.msgflg = args->arg3;
224 a.sysmsg_lresult = 0;
225 error = linux_msgsnd(&a);
226 args->sysmsg_lresult = a.sysmsg_lresult;
230 struct linux_msgrcv_args a;
232 a.msqid = args->arg1;
233 a.msgsz = args->arg2;
238 a.msgflg = args->arg3;
239 a.sysmsg_lresult = 0;
240 if ((args->what >> 16) == 0) {
241 struct l_ipc_kludge tmp;
244 if (args->ptr == NULL) {
248 error = copyin((caddr_t)args->ptr, &tmp, sizeof(tmp));
252 a.msgtyp = tmp.msgtyp;
255 a.msgtyp = args->arg5;
257 error = linux_msgrcv(&a);
258 args->sysmsg_lresult = a.sysmsg_lresult;
262 struct linux_msgget_args a;
265 a.msgflg = args->arg2;
266 a.sysmsg_lresult = 0;
267 error = linux_msgget(&a);
268 args->sysmsg_lresult = a.sysmsg_lresult;
272 struct linux_msgctl_args a;
274 a.msqid = args->arg1;
277 a.sysmsg_lresult = 0;
278 error = linux_msgctl(&a);
279 args->sysmsg_lresult = a.sysmsg_lresult;
283 struct linux_shmat_args a;
285 a.shmid = args->arg1;
286 a.shmaddr = args->ptr;
287 a.shmflg = args->arg2;
288 a.raddr = (l_ulong *)args->arg3;
289 a.sysmsg_lresult = 0;
290 error = linux_shmat(&a);
291 args->sysmsg_lresult = a.sysmsg_lresult;
295 struct linux_shmdt_args a;
297 a.shmaddr = args->ptr;
298 a.sysmsg_lresult = 0;
299 error = linux_shmdt(&a);
300 args->sysmsg_lresult = a.sysmsg_lresult;
304 struct linux_shmget_args a;
308 a.shmflg = args->arg3;
309 a.sysmsg_lresult = 0;
310 error = linux_shmget(&a);
311 args->sysmsg_lresult = a.sysmsg_lresult;
315 struct linux_shmctl_args a;
317 a.shmid = args->arg1;
320 a.sysmsg_lresult = 0;
321 error = linux_shmctl(&a);
322 args->sysmsg_lresult = a.sysmsg_lresult;
337 sys_linux_old_select(struct linux_old_select_args *args)
339 struct l_old_select_argv linux_args;
340 struct linux_select_args newsel;
344 if (ldebug(old_select))
345 kprintf(ARGS(old_select, "%p"), args->ptr);
348 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
352 newsel.sysmsg_iresult = 0;
353 newsel.nfds = linux_args.nfds;
354 newsel.readfds = linux_args.readfds;
355 newsel.writefds = linux_args.writefds;
356 newsel.exceptfds = linux_args.exceptfds;
357 newsel.timeout = linux_args.timeout;
358 error = sys_linux_select(&newsel);
359 args->sysmsg_iresult = newsel.sysmsg_iresult;
367 sys_linux_fork(struct linux_fork_args *args)
369 struct lwp *lp = curthread->td_lwp;
374 error = fork1(lp, RFFDG | RFPROC | RFPGLOCK, &p2);
376 emuldata_init(curproc, p2, 0);
378 start_forked_proc(lp, p2);
379 args->sysmsg_fds[0] = p2->p_pid;
380 args->sysmsg_fds[1] = 0;
384 /* Are we the child? */
385 if (args->sysmsg_iresult == 1)
386 args->sysmsg_iresult = 0;
395 sys_linux_exit_group(struct linux_exit_group_args *args)
397 struct linux_emuldata *em, *e;
403 em = emuldata_get(curproc);
405 if (em->s->refs == 1) {
407 exit1(W_EXITCODE(rval, 0));
411 KKASSERT(em->proc == curproc);
412 em->flags |= EMUL_DIDKILL;
413 em->s->flags |= LINUX_LES_INEXITGROUP;
414 em->s->xstat = W_EXITCODE(rval, 0);
416 LIST_REMOVE(em, threads);
417 LIST_INSERT_HEAD(&em->s->threads, em, threads);
419 while ((e = LIST_NEXT(em, threads)) != NULL) {
420 LIST_REMOVE(em, threads);
421 LIST_INSERT_AFTER(e, em, threads);
422 if ((e->flags & EMUL_DIDKILL) == 0) {
423 e->flags |= EMUL_DIDKILL;
424 lwkt_gettoken(&proc_token);
425 KKASSERT(pfindn(e->proc->p_pid) == e->proc);
426 ksignal(e->proc, SIGKILL);
427 lwkt_reltoken(&proc_token);
432 exit1(W_EXITCODE(rval, 0));
442 sys_linux_vfork(struct linux_vfork_args *args)
444 struct lwp *lp = curthread->td_lwp;
449 error = fork1(lp, RFFDG | RFPROC | RFPPWAIT | RFMEM | RFPGLOCK, &p2);
451 emuldata_init(curproc, p2, 0);
453 start_forked_proc(lp, p2);
454 args->sysmsg_fds[0] = p2->p_pid;
455 args->sysmsg_fds[1] = 0;
459 if (args->sysmsg_iresult == 1)
460 args->sysmsg_iresult = 0;
469 sys_linux_clone(struct linux_clone_args *args)
471 struct segment_descriptor *desc;
472 struct l_user_desc info;
476 struct lwp *lp = curthread->td_lwp;
477 int error, ff = RFPROC;
478 struct proc *p2 = NULL;
482 exit_signal = args->flags & 0x000000ff;
483 if (exit_signal >= LINUX_NSIG)
485 if (exit_signal <= LINUX_SIGTBLSZ)
486 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
488 if (args->flags & LINUX_CLONE_VM)
490 if (args->flags & LINUX_CLONE_SIGHAND)
492 if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS)))
494 if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
496 if (args->flags & LINUX_CLONE_VFORK)
498 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
499 if (args->parent_tidptr == NULL)
507 error = fork1(lp, ff | RFPGLOCK, &p2);
513 args->sysmsg_fds[0] = p2 ? p2->p_pid : 0;
514 args->sysmsg_fds[1] = 0;
516 if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD))
517 proc_reparent(p2, curproc->p_pptr /* XXX */);
519 emuldata_init(curproc, p2, args->flags);
520 linux_proc_fork(p2, curproc, args->child_tidptr);
522 * XXX: this can't happen, p2 is never NULL, or else we'd have
523 * other problems, too (see p2->p_sigparent == ...,
524 * linux_proc_fork and emuldata_init.
529 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
530 error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
534 p2->p_sigparent = exit_signal;
536 ONLY_LWP_IN_PROC(p2)->lwp_md.md_regs->tf_esp =
537 (unsigned long)args->stack;
540 if (args->flags & LINUX_CLONE_SETTLS) {
541 error = copyin((void *)curthread->td_lwp->lwp_md.md_regs->tf_esi, &info, sizeof(struct l_user_desc));
543 kprintf("copyin of tf_esi to info failed\n");
545 idx = info.entry_number;
547 * We understand both our own entries such as the ones
548 * we provide on linux_set_thread_area, as well as the
549 * linux-type entries 6-8.
551 if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
552 kprintf("LINUX_CLONE_SETTLS, invalid idx requested: %d\n", idx);
555 if (idx < GTLS_START) {
559 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
565 a[0] = LINUX_LDT_entry_a(&info);
566 a[1] = LINUX_LDT_entry_b(&info);
568 desc = &FIRST_LWP_IN_PROC(p2)->lwp_thread->td_tls.tls[idx];
569 memcpy(desc, &a, sizeof(a));
571 kprintf("linux_clone... we don't have a p2\n");
577 start_forked_proc(lp, p2);
582 kprintf(LMSG("clone: successful rfork to %ld"),
599 #define STACK_SIZE (2 * 1024 * 1024)
600 #define GUARD_SIZE (4 * PAGE_SIZE)
606 linux_mmap_common(caddr_t linux_addr, size_t linux_len, int linux_prot,
607 int linux_flags, int linux_fd, off_t pos, void **res)
609 struct thread *td = curthread;
610 struct proc *p = td->td_proc;
613 int error, flags, len, prot, fd;
616 if (linux_flags & LINUX_MAP_SHARED)
618 if (linux_flags & LINUX_MAP_PRIVATE)
619 flags |= MAP_PRIVATE;
620 if (linux_flags & LINUX_MAP_FIXED)
622 if (linux_flags & LINUX_MAP_ANON) {
628 lwkt_gettoken(&curproc->p_vmspace->vm_map.token);
630 if (linux_flags & LINUX_MAP_GROWSDOWN) {
632 /* The linux MAP_GROWSDOWN option does not limit auto
633 * growth of the region. Linux mmap with this option
634 * takes as addr the inital BOS, and as len, the initial
635 * region size. It can then grow down from addr without
636 * limit. However, linux threads has an implicit internal
637 * limit to stack size of STACK_SIZE. Its just not
638 * enforced explicitly in linux. But, here we impose
639 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
640 * region, since we can do this with our mmap.
642 * Our mmap with MAP_STACK takes addr as the maximum
643 * downsize limit on BOS, and as len the max size of
644 * the region. It them maps the top SGROWSIZ bytes,
645 * and autgrows the region down, up to the limit
648 * If we don't use the MAP_STACK option, the effect
649 * of this code is to allocate a stack region of a
650 * fixed size of (STACK_SIZE - GUARD_SIZE).
653 /* This gives us TOS */
654 addr = linux_addr + linux_len;
656 if (addr > p->p_vmspace->vm_maxsaddr) {
657 /* Some linux apps will attempt to mmap
658 * thread stacks near the top of their
659 * address space. If their TOS is greater
660 * than vm_maxsaddr, vm_map_growstack()
661 * will confuse the thread stack with the
662 * process stack and deliver a SEGV if they
663 * attempt to grow the thread stack past their
664 * current stacksize rlimit. To avoid this,
665 * adjust vm_maxsaddr upwards to reflect
666 * the current stacksize rlimit rather
667 * than the maximum possible stacksize.
668 * It would be better to adjust the
669 * mmap'ed region, but some apps do not check
670 * mmap's return value.
672 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
673 p->p_rlimit[RLIMIT_STACK].rlim_cur;
676 /* This gives us our maximum stack size */
677 if (linux_len > STACK_SIZE - GUARD_SIZE) {
680 len = STACK_SIZE - GUARD_SIZE;
682 /* This gives us a new BOS. If we're using VM_STACK, then
683 * mmap will just map the top SGROWSIZ bytes, and let
684 * the stack grow down to the limit at BOS. If we're
685 * not using VM_STACK we map the full stack, since we
686 * don't have a way to autogrow it.
696 if (prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
697 prot |= PROT_READ | PROT_EXEC;
699 if (linux_flags & LINUX_MAP_ANON) {
706 if (ldebug(mmap) || ldebug(mmap2))
707 kprintf("-> (%p, %d, %d, 0x%08x, %d, %lld)\n",
708 addr, len, prot, flags, fd, pos);
710 error = kern_mmap(curproc->p_vmspace, addr, len,
711 prot, flags, fd, pos, &new);
713 lwkt_reltoken(&curproc->p_vmspace->vm_map.token);
724 sys_linux_mmap(struct linux_mmap_args *args)
726 struct l_mmap_argv linux_args;
729 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
735 kprintf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
736 (void *)linux_args.addr, linux_args.len, linux_args.prot,
737 linux_args.flags, linux_args.fd, linux_args.pos);
739 error = linux_mmap_common(linux_args.addr, linux_args.len,
740 linux_args.prot, linux_args.flags, linux_args.fd,
741 linux_args.pos, &args->sysmsg_resultp);
744 kprintf("-> %p\n", args->sysmsg_resultp);
753 sys_linux_mmap2(struct linux_mmap2_args *args)
759 kprintf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
760 (void *)args->addr, args->len, args->prot, args->flags,
761 args->fd, args->pgoff);
763 error = linux_mmap_common((void *)args->addr, args->len, args->prot,
764 args->flags, args->fd, args->pgoff * PAGE_SIZE,
765 &args->sysmsg_resultp);
768 kprintf("-> %p\n", args->sysmsg_resultp);
777 sys_linux_pipe(struct linux_pipe_args *args)
781 struct pipe_args bsd_args;
785 kprintf(ARGS(pipe, "*"));
788 reg_edx = args->sysmsg_fds[1];
789 error = sys_pipe(&bsd_args);
791 args->sysmsg_fds[1] = reg_edx;
795 error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
797 args->sysmsg_fds[1] = reg_edx;
801 args->sysmsg_fds[1] = reg_edx;
802 args->sysmsg_fds[0] = 0;
810 sys_linux_pipe2(struct linux_pipe2_args *args)
812 struct thread *td = curthread;
815 struct pipe_args bsd_args;
818 reg_edx = args->sysmsg_fds[1];
819 error = sys_pipe(&bsd_args);
821 args->sysmsg_fds[1] = reg_edx;
825 // if (args->flags & LINUX_O_CLOEXEC) {
828 if (args->flags & LINUX_O_NONBLOCK) {
829 dat.fc_flags = O_NONBLOCK;
830 kern_fcntl(bsd_args.sysmsg_fds[0], F_SETFL, &dat, td->td_ucred);
831 kern_fcntl(bsd_args.sysmsg_fds[1], F_SETFL, &dat, td->td_ucred);
834 error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
836 args->sysmsg_fds[1] = reg_edx;
840 args->sysmsg_fds[1] = reg_edx;
841 args->sysmsg_fds[0] = 0;
849 sys_linux_ioperm(struct linux_ioperm_args *args)
851 struct sysarch_args sa;
852 struct i386_ioperm_args *iia;
856 sg = stackgap_init();
857 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args));
858 iia->start = args->start;
859 iia->length = args->length;
860 iia->enable = args->enable;
861 sa.sysmsg_resultp = NULL;
862 sa.op = I386_SET_IOPERM;
863 sa.parms = (char *)iia;
864 error = sys_sysarch(&sa);
865 args->sysmsg_resultp = sa.sysmsg_resultp;
873 sys_linux_iopl(struct linux_iopl_args *args)
875 struct thread *td = curthread;
876 struct lwp *lp = td->td_lwp;
879 if (args->level < 0 || args->level > 3)
881 if ((error = priv_check(td, PRIV_ROOT)) != 0)
885 lp->lwp_md.md_regs->tf_eflags =
886 (lp->lwp_md.md_regs->tf_eflags & ~PSL_IOPL) |
887 (args->level * (PSL_IOPL / 3));
895 sys_linux_modify_ldt(struct linux_modify_ldt_args *uap)
899 struct sysarch_args args;
900 struct i386_ldt_args *ldt;
901 struct l_descriptor ld;
902 union descriptor *desc;
905 sg = stackgap_init();
907 if (uap->ptr == NULL)
911 case 0x00: /* read_ldt */
912 ldt = stackgap_alloc(&sg, sizeof(*ldt));
914 ldt->descs = uap->ptr;
915 ldt->num = uap->bytecount / sizeof(union descriptor);
916 args.op = I386_GET_LDT;
917 args.parms = (char*)ldt;
918 args.sysmsg_iresult = 0;
919 error = sys_sysarch(&args);
920 uap->sysmsg_iresult = args.sysmsg_iresult *
921 sizeof(union descriptor);
923 case 0x02: /* read_default_ldt = 0 */
924 size = 5*sizeof(struct l_desc_struct);
925 if (size > uap->bytecount)
926 size = uap->bytecount;
927 for (written = error = 0; written < size && error == 0; written++)
928 error = subyte((char *)uap->ptr + written, 0);
929 uap->sysmsg_iresult = written;
931 case 0x01: /* write_ldt */
932 case 0x11: /* write_ldt */
933 if (uap->bytecount != sizeof(ld))
936 error = copyin(uap->ptr, &ld, sizeof(ld));
940 ldt = stackgap_alloc(&sg, sizeof(*ldt));
941 desc = stackgap_alloc(&sg, sizeof(*desc));
942 ldt->start = ld.entry_number;
945 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff);
946 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
947 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff);
948 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
949 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
952 desc->sd.sd_p = (ld.seg_not_present ^ 1);
954 desc->sd.sd_def32 = ld.seg_32bit;
955 desc->sd.sd_gran = ld.limit_in_pages;
956 args.op = I386_SET_LDT;
957 args.parms = (char*)ldt;
958 args.sysmsg_iresult = 0;
959 error = sys_sysarch(&args);
960 uap->sysmsg_iresult = args.sysmsg_iresult;
974 sys_linux_sigaction(struct linux_sigaction_args *args)
977 l_sigaction_t linux_act, linux_oact;
978 struct sigaction act, oact;
982 if (ldebug(sigaction))
983 kprintf(ARGS(sigaction, "%d, %p, %p"),
984 args->sig, (void *)args->nsa, (void *)args->osa);
988 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
991 linux_act.lsa_handler = osa.lsa_handler;
992 linux_act.lsa_flags = osa.lsa_flags;
993 linux_act.lsa_restorer = osa.lsa_restorer;
994 LINUX_SIGEMPTYSET(linux_act.lsa_mask);
995 linux_act.lsa_mask.__bits[0] = osa.lsa_mask;
996 linux_to_bsd_sigaction(&linux_act, &act);
999 if (args->sig <= LINUX_SIGTBLSZ)
1000 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
1005 error = kern_sigaction(sig, args->nsa ? &act : NULL,
1006 args->osa ? &oact : NULL);
1009 if (args->osa != NULL && !error) {
1010 bsd_to_linux_sigaction(&oact, &linux_oact);
1011 osa.lsa_handler = linux_oact.lsa_handler;
1012 osa.lsa_flags = linux_oact.lsa_flags;
1013 osa.lsa_restorer = linux_oact.lsa_restorer;
1014 osa.lsa_mask = linux_oact.lsa_mask.__bits[0];
1015 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
1021 * Linux has two extra args, restart and oldmask. We dont use these,
1022 * but it seems that "restart" is actually a context pointer that
1023 * enables the signal to happen with a different register set.
1028 sys_linux_sigsuspend(struct linux_sigsuspend_args *args)
1030 l_sigset_t linux_mask;
1035 if (ldebug(sigsuspend))
1036 kprintf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
1039 LINUX_SIGEMPTYSET(mask);
1040 mask.__bits[0] = args->mask;
1041 linux_to_bsd_sigset(&linux_mask, &mask);
1044 error = kern_sigsuspend(&mask);
1054 sys_linux_rt_sigsuspend(struct linux_rt_sigsuspend_args *uap)
1056 l_sigset_t linux_mask;
1061 if (ldebug(rt_sigsuspend))
1062 kprintf(ARGS(rt_sigsuspend, "%p, %d"),
1063 (void *)uap->newset, uap->sigsetsize);
1066 if (uap->sigsetsize != sizeof(l_sigset_t))
1069 error = copyin(uap->newset, &linux_mask, sizeof(l_sigset_t));
1073 linux_to_bsd_sigset(&linux_mask, &mask);
1076 error = kern_sigsuspend(&mask);
1086 sys_linux_pause(struct linux_pause_args *args)
1088 struct thread *td = curthread;
1089 struct lwp *lp = td->td_lwp;
1095 kprintf(ARGS(pause, ""));
1098 mask = lp->lwp_sigmask;
1101 error = kern_sigsuspend(&mask);
1111 sys_linux_sigaltstack(struct linux_sigaltstack_args *uap)
1118 if (ldebug(sigaltstack))
1119 kprintf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
1123 error = copyin(uap->uss, &linux_ss, sizeof(l_stack_t));
1127 ss.ss_sp = linux_ss.ss_sp;
1128 ss.ss_size = linux_ss.ss_size;
1129 ss.ss_flags = linux_to_bsd_sigaltstack(linux_ss.ss_flags);
1133 error = kern_sigaltstack(uap->uss ? &ss : NULL,
1134 uap->uoss ? &oss : NULL);
1137 if (error == 0 && uap->uoss) {
1138 linux_ss.ss_sp = oss.ss_sp;
1139 linux_ss.ss_size = oss.ss_size;
1140 linux_ss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
1141 error = copyout(&linux_ss, uap->uoss, sizeof(l_stack_t));
1148 sys_linux_set_thread_area(struct linux_set_thread_area_args *args)
1150 struct segment_descriptor *desc;
1151 struct l_user_desc info;
1157 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
1162 if (ldebug(set_thread_area))
1163 kprintf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
1169 info.read_exec_only,
1170 info.limit_in_pages,
1171 info.seg_not_present,
1175 idx = info.entry_number;
1176 if (idx != -1 && (idx < 6 || idx > 8))
1180 /* -1 means finding the first free TLS entry */
1181 for (i = 0; i < NGTLS; i++) {
1183 * try to determine if the TLS entry is empty by looking
1184 * at the lolimit entry.
1186 if (curthread->td_tls.tls[idx].sd_lolimit == 0) {
1194 * By now we should have an index. If not, it means
1195 * that no entry is free, so return ESRCH.
1200 /* translate the index from Linux to ours */
1205 /* Tell the caller about the allocated entry number */
1207 info.entry_number = GTLS_START + mycpu->gd_cpuid * NGDT + idx;
1209 info.entry_number = GTLS_START + idx;
1212 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
1216 if (LINUX_LDT_empty(&info)) {
1220 a[0] = LINUX_LDT_entry_a(&info);
1221 a[1] = LINUX_LDT_entry_b(&info);
1225 * Update the TLS and the TLS entries in the GDT, but hold a critical
1226 * section as required by set_user_TLS().
1229 desc = &curthread->td_tls.tls[idx];
1230 memcpy(desc, &a, sizeof(a));
1238 sys_linux_get_thread_area(struct linux_get_thread_area_args *args)
1240 struct segment_descriptor *sd;
1241 struct l_desc_struct desc;
1242 struct l_user_desc info;
1247 if (ldebug(get_thread_area))
1248 kprintf(ARGS(get_thread_area, "%p"), args->desc);
1251 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
1255 idx = info.entry_number;
1256 if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
1257 kprintf("sys_linux_get_thread_area, invalid idx requested: %d\n", idx);
1261 memset(&info, 0, sizeof(info));
1263 /* translate the index from Linux to ours */
1264 info.entry_number = idx;
1265 if (idx < GTLS_START) {
1269 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
1276 sd = &curthread->td_tls.tls[idx];
1277 memcpy(&desc, sd, sizeof(desc));
1278 info.base_addr = LINUX_GET_BASE(&desc);
1279 info.limit = LINUX_GET_LIMIT(&desc);
1280 info.seg_32bit = LINUX_GET_32BIT(&desc);
1281 info.contents = LINUX_GET_CONTENTS(&desc);
1282 info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
1283 info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
1284 info.seg_not_present = !LINUX_GET_PRESENT(&desc);
1285 info.useable = LINUX_GET_USEABLE(&desc);
1287 error = copyout(&info, args->desc, sizeof(struct l_user_desc));