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) {
408 exit1(W_EXITCODE(rval, 0));
413 KKASSERT(em->proc == curproc);
414 em->flags |= EMUL_DIDKILL;
415 em->s->flags |= LINUX_LES_INEXITGROUP;
416 em->s->xstat = W_EXITCODE(rval, 0);
418 LIST_REMOVE(em, threads);
419 LIST_INSERT_HEAD(&em->s->threads, em, threads);
421 while ((e = LIST_NEXT(em, threads)) != NULL) {
422 LIST_REMOVE(em, threads);
423 LIST_INSERT_AFTER(e, em, threads);
424 if ((e->flags & EMUL_DIDKILL) == 0) {
425 e->flags |= EMUL_DIDKILL;
426 KKASSERT(pfind(e->proc->p_pid) == e->proc);
428 ksignal(e->proc, SIGKILL);
435 exit1(W_EXITCODE(rval, 0));
446 sys_linux_vfork(struct linux_vfork_args *args)
448 struct lwp *lp = curthread->td_lwp;
453 error = fork1(lp, RFFDG | RFPROC | RFPPWAIT | RFMEM | RFPGLOCK, &p2);
455 emuldata_init(curproc, p2, 0);
457 start_forked_proc(lp, p2);
458 args->sysmsg_fds[0] = p2->p_pid;
459 args->sysmsg_fds[1] = 0;
463 if (args->sysmsg_iresult == 1)
464 args->sysmsg_iresult = 0;
473 sys_linux_clone(struct linux_clone_args *args)
475 struct segment_descriptor *desc;
476 struct l_user_desc info;
480 struct lwp *lp = curthread->td_lwp;
481 int error, ff = RFPROC;
482 struct proc *p2 = NULL;
486 exit_signal = args->flags & 0x000000ff;
487 if (exit_signal >= LINUX_NSIG)
489 if (exit_signal <= LINUX_SIGTBLSZ)
490 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
492 if (args->flags & LINUX_CLONE_VM)
494 if (args->flags & LINUX_CLONE_SIGHAND)
496 if (!(args->flags & (LINUX_CLONE_FILES | LINUX_CLONE_FS)))
498 if ((args->flags & 0xffffff00) == LINUX_THREADING_FLAGS)
500 if (args->flags & LINUX_CLONE_VFORK)
502 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
503 if (args->parent_tidptr == NULL)
511 error = fork1(lp, ff | RFPGLOCK, &p2);
517 args->sysmsg_fds[0] = p2 ? p2->p_pid : 0;
518 args->sysmsg_fds[1] = 0;
520 if (args->flags & (LINUX_CLONE_PARENT | LINUX_CLONE_THREAD))
521 proc_reparent(p2, curproc->p_pptr /* XXX */);
523 emuldata_init(curproc, p2, args->flags);
524 linux_proc_fork(p2, curproc, args->child_tidptr);
526 * XXX: this can't happen, p2 is never NULL, or else we'd have
527 * other problems, too (see p2->p_sigparent == ...,
528 * linux_proc_fork and emuldata_init.
533 if (args->flags & LINUX_CLONE_PARENT_SETTID) {
534 error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
538 p2->p_sigparent = exit_signal;
540 ONLY_LWP_IN_PROC(p2)->lwp_md.md_regs->tf_esp =
541 (unsigned long)args->stack;
544 if (args->flags & LINUX_CLONE_SETTLS) {
545 error = copyin((void *)curthread->td_lwp->lwp_md.md_regs->tf_esi, &info, sizeof(struct l_user_desc));
547 kprintf("copyin of tf_esi to info failed\n");
549 idx = info.entry_number;
551 * We understand both our own entries such as the ones
552 * we provide on linux_set_thread_area, as well as the
553 * linux-type entries 6-8.
555 if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
556 kprintf("LINUX_CLONE_SETTLS, invalid idx requested: %d\n", idx);
559 if (idx < GTLS_START) {
563 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
569 a[0] = LINUX_LDT_entry_a(&info);
570 a[1] = LINUX_LDT_entry_b(&info);
572 desc = &FIRST_LWP_IN_PROC(p2)->lwp_thread->td_tls.tls[idx];
573 memcpy(desc, &a, sizeof(a));
575 kprintf("linux_clone... we don't have a p2\n");
581 start_forked_proc(lp, p2);
586 kprintf(LMSG("clone: successful rfork to %ld"),
603 #define STACK_SIZE (2 * 1024 * 1024)
604 #define GUARD_SIZE (4 * PAGE_SIZE)
610 linux_mmap_common(caddr_t linux_addr, size_t linux_len, int linux_prot,
611 int linux_flags, int linux_fd, off_t pos, void **res)
613 struct thread *td = curthread;
614 struct proc *p = td->td_proc;
617 int error, flags, len, prot, fd;
620 if (linux_flags & LINUX_MAP_SHARED)
622 if (linux_flags & LINUX_MAP_PRIVATE)
623 flags |= MAP_PRIVATE;
624 if (linux_flags & LINUX_MAP_FIXED)
626 if (linux_flags & LINUX_MAP_ANON) {
632 lwkt_gettoken(&vm_token);
633 lwkt_gettoken(&vmspace_token);
635 if (linux_flags & LINUX_MAP_GROWSDOWN) {
637 /* The linux MAP_GROWSDOWN option does not limit auto
638 * growth of the region. Linux mmap with this option
639 * takes as addr the inital BOS, and as len, the initial
640 * region size. It can then grow down from addr without
641 * limit. However, linux threads has an implicit internal
642 * limit to stack size of STACK_SIZE. Its just not
643 * enforced explicitly in linux. But, here we impose
644 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
645 * region, since we can do this with our mmap.
647 * Our mmap with MAP_STACK takes addr as the maximum
648 * downsize limit on BOS, and as len the max size of
649 * the region. It them maps the top SGROWSIZ bytes,
650 * and autgrows the region down, up to the limit
653 * If we don't use the MAP_STACK option, the effect
654 * of this code is to allocate a stack region of a
655 * fixed size of (STACK_SIZE - GUARD_SIZE).
658 /* This gives us TOS */
659 addr = linux_addr + linux_len;
661 if (addr > p->p_vmspace->vm_maxsaddr) {
662 /* Some linux apps will attempt to mmap
663 * thread stacks near the top of their
664 * address space. If their TOS is greater
665 * than vm_maxsaddr, vm_map_growstack()
666 * will confuse the thread stack with the
667 * process stack and deliver a SEGV if they
668 * attempt to grow the thread stack past their
669 * current stacksize rlimit. To avoid this,
670 * adjust vm_maxsaddr upwards to reflect
671 * the current stacksize rlimit rather
672 * than the maximum possible stacksize.
673 * It would be better to adjust the
674 * mmap'ed region, but some apps do not check
675 * mmap's return value.
677 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
678 p->p_rlimit[RLIMIT_STACK].rlim_cur;
681 /* This gives us our maximum stack size */
682 if (linux_len > STACK_SIZE - GUARD_SIZE) {
685 len = STACK_SIZE - GUARD_SIZE;
687 /* This gives us a new BOS. If we're using VM_STACK, then
688 * mmap will just map the top SGROWSIZ bytes, and let
689 * the stack grow down to the limit at BOS. If we're
690 * not using VM_STACK we map the full stack, since we
691 * don't have a way to autogrow it.
701 if (prot & (PROT_READ | PROT_WRITE | PROT_EXEC))
702 prot |= PROT_READ | PROT_EXEC;
704 if (linux_flags & LINUX_MAP_ANON) {
711 if (ldebug(mmap) || ldebug(mmap2))
712 kprintf("-> (%p, %d, %d, 0x%08x, %d, %lld)\n",
713 addr, len, prot, flags, fd, pos);
715 error = kern_mmap(curproc->p_vmspace, addr, len,
716 prot, flags, fd, pos, &new);
718 lwkt_reltoken(&vmspace_token);
719 lwkt_reltoken(&vm_token);
730 sys_linux_mmap(struct linux_mmap_args *args)
732 struct l_mmap_argv linux_args;
735 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
741 kprintf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
742 (void *)linux_args.addr, linux_args.len, linux_args.prot,
743 linux_args.flags, linux_args.fd, linux_args.pos);
745 error = linux_mmap_common(linux_args.addr, linux_args.len,
746 linux_args.prot, linux_args.flags, linux_args.fd,
747 linux_args.pos, &args->sysmsg_resultp);
750 kprintf("-> %p\n", args->sysmsg_resultp);
759 sys_linux_mmap2(struct linux_mmap2_args *args)
765 kprintf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
766 (void *)args->addr, args->len, args->prot, args->flags,
767 args->fd, args->pgoff);
769 error = linux_mmap_common((void *)args->addr, args->len, args->prot,
770 args->flags, args->fd, args->pgoff * PAGE_SIZE,
771 &args->sysmsg_resultp);
774 kprintf("-> %p\n", args->sysmsg_resultp);
783 sys_linux_pipe(struct linux_pipe_args *args)
787 struct pipe_args bsd_args;
791 kprintf(ARGS(pipe, "*"));
794 reg_edx = args->sysmsg_fds[1];
795 error = sys_pipe(&bsd_args);
797 args->sysmsg_fds[1] = reg_edx;
801 error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
803 args->sysmsg_fds[1] = reg_edx;
807 args->sysmsg_fds[1] = reg_edx;
808 args->sysmsg_fds[0] = 0;
816 sys_linux_pipe2(struct linux_pipe2_args *args)
818 struct thread *td = curthread;
821 struct pipe_args bsd_args;
824 reg_edx = args->sysmsg_fds[1];
825 error = sys_pipe(&bsd_args);
827 args->sysmsg_fds[1] = reg_edx;
831 // if (args->flags & LINUX_O_CLOEXEC) {
834 if (args->flags & LINUX_O_NONBLOCK) {
835 dat.fc_flags = O_NONBLOCK;
836 kern_fcntl(bsd_args.sysmsg_fds[0], F_SETFL, &dat, td->td_ucred);
837 kern_fcntl(bsd_args.sysmsg_fds[1], F_SETFL, &dat, td->td_ucred);
840 error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
842 args->sysmsg_fds[1] = reg_edx;
846 args->sysmsg_fds[1] = reg_edx;
847 args->sysmsg_fds[0] = 0;
855 sys_linux_ioperm(struct linux_ioperm_args *args)
857 struct sysarch_args sa;
858 struct i386_ioperm_args *iia;
862 sg = stackgap_init();
863 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args));
864 iia->start = args->start;
865 iia->length = args->length;
866 iia->enable = args->enable;
867 sa.sysmsg_resultp = NULL;
868 sa.op = I386_SET_IOPERM;
869 sa.parms = (char *)iia;
870 error = sys_sysarch(&sa);
871 args->sysmsg_resultp = sa.sysmsg_resultp;
879 sys_linux_iopl(struct linux_iopl_args *args)
881 struct thread *td = curthread;
882 struct lwp *lp = td->td_lwp;
885 if (args->level < 0 || args->level > 3)
887 if ((error = priv_check(td, PRIV_ROOT)) != 0)
891 lp->lwp_md.md_regs->tf_eflags =
892 (lp->lwp_md.md_regs->tf_eflags & ~PSL_IOPL) |
893 (args->level * (PSL_IOPL / 3));
901 sys_linux_modify_ldt(struct linux_modify_ldt_args *uap)
905 struct sysarch_args args;
906 struct i386_ldt_args *ldt;
907 struct l_descriptor ld;
908 union descriptor *desc;
911 sg = stackgap_init();
913 if (uap->ptr == NULL)
917 case 0x00: /* read_ldt */
918 ldt = stackgap_alloc(&sg, sizeof(*ldt));
920 ldt->descs = uap->ptr;
921 ldt->num = uap->bytecount / sizeof(union descriptor);
922 args.op = I386_GET_LDT;
923 args.parms = (char*)ldt;
924 args.sysmsg_iresult = 0;
925 error = sys_sysarch(&args);
926 uap->sysmsg_iresult = args.sysmsg_iresult *
927 sizeof(union descriptor);
929 case 0x02: /* read_default_ldt = 0 */
930 size = 5*sizeof(struct l_desc_struct);
931 if (size > uap->bytecount)
932 size = uap->bytecount;
933 for (written = error = 0; written < size && error == 0; written++)
934 error = subyte((char *)uap->ptr + written, 0);
935 uap->sysmsg_iresult = written;
937 case 0x01: /* write_ldt */
938 case 0x11: /* write_ldt */
939 if (uap->bytecount != sizeof(ld))
942 error = copyin(uap->ptr, &ld, sizeof(ld));
946 ldt = stackgap_alloc(&sg, sizeof(*ldt));
947 desc = stackgap_alloc(&sg, sizeof(*desc));
948 ldt->start = ld.entry_number;
951 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff);
952 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
953 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff);
954 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
955 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
958 desc->sd.sd_p = (ld.seg_not_present ^ 1);
960 desc->sd.sd_def32 = ld.seg_32bit;
961 desc->sd.sd_gran = ld.limit_in_pages;
962 args.op = I386_SET_LDT;
963 args.parms = (char*)ldt;
964 args.sysmsg_iresult = 0;
965 error = sys_sysarch(&args);
966 uap->sysmsg_iresult = args.sysmsg_iresult;
980 sys_linux_sigaction(struct linux_sigaction_args *args)
983 l_sigaction_t linux_act, linux_oact;
984 struct sigaction act, oact;
988 if (ldebug(sigaction))
989 kprintf(ARGS(sigaction, "%d, %p, %p"),
990 args->sig, (void *)args->nsa, (void *)args->osa);
994 error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
997 linux_act.lsa_handler = osa.lsa_handler;
998 linux_act.lsa_flags = osa.lsa_flags;
999 linux_act.lsa_restorer = osa.lsa_restorer;
1000 LINUX_SIGEMPTYSET(linux_act.lsa_mask);
1001 linux_act.lsa_mask.__bits[0] = osa.lsa_mask;
1002 linux_to_bsd_sigaction(&linux_act, &act);
1005 if (args->sig <= LINUX_SIGTBLSZ)
1006 sig = linux_to_bsd_signal[_SIG_IDX(args->sig)];
1011 error = kern_sigaction(sig, args->nsa ? &act : NULL,
1012 args->osa ? &oact : NULL);
1015 if (args->osa != NULL && !error) {
1016 bsd_to_linux_sigaction(&oact, &linux_oact);
1017 osa.lsa_handler = linux_oact.lsa_handler;
1018 osa.lsa_flags = linux_oact.lsa_flags;
1019 osa.lsa_restorer = linux_oact.lsa_restorer;
1020 osa.lsa_mask = linux_oact.lsa_mask.__bits[0];
1021 error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
1027 * Linux has two extra args, restart and oldmask. We dont use these,
1028 * but it seems that "restart" is actually a context pointer that
1029 * enables the signal to happen with a different register set.
1034 sys_linux_sigsuspend(struct linux_sigsuspend_args *args)
1036 l_sigset_t linux_mask;
1041 if (ldebug(sigsuspend))
1042 kprintf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
1045 LINUX_SIGEMPTYSET(mask);
1046 mask.__bits[0] = args->mask;
1047 linux_to_bsd_sigset(&linux_mask, &mask);
1050 error = kern_sigsuspend(&mask);
1060 sys_linux_rt_sigsuspend(struct linux_rt_sigsuspend_args *uap)
1062 l_sigset_t linux_mask;
1067 if (ldebug(rt_sigsuspend))
1068 kprintf(ARGS(rt_sigsuspend, "%p, %d"),
1069 (void *)uap->newset, uap->sigsetsize);
1072 if (uap->sigsetsize != sizeof(l_sigset_t))
1075 error = copyin(uap->newset, &linux_mask, sizeof(l_sigset_t));
1079 linux_to_bsd_sigset(&linux_mask, &mask);
1082 error = kern_sigsuspend(&mask);
1092 sys_linux_pause(struct linux_pause_args *args)
1094 struct thread *td = curthread;
1095 struct lwp *lp = td->td_lwp;
1101 kprintf(ARGS(pause, ""));
1104 mask = lp->lwp_sigmask;
1107 error = kern_sigsuspend(&mask);
1117 sys_linux_sigaltstack(struct linux_sigaltstack_args *uap)
1124 if (ldebug(sigaltstack))
1125 kprintf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
1129 error = copyin(uap->uss, &linux_ss, sizeof(l_stack_t));
1133 ss.ss_sp = linux_ss.ss_sp;
1134 ss.ss_size = linux_ss.ss_size;
1135 ss.ss_flags = linux_to_bsd_sigaltstack(linux_ss.ss_flags);
1139 error = kern_sigaltstack(uap->uss ? &ss : NULL,
1140 uap->uoss ? &oss : NULL);
1143 if (error == 0 && uap->uoss) {
1144 linux_ss.ss_sp = oss.ss_sp;
1145 linux_ss.ss_size = oss.ss_size;
1146 linux_ss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
1147 error = copyout(&linux_ss, uap->uoss, sizeof(l_stack_t));
1154 sys_linux_set_thread_area(struct linux_set_thread_area_args *args)
1156 struct segment_descriptor *desc;
1157 struct l_user_desc info;
1163 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
1168 if (ldebug(set_thread_area))
1169 kprintf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
1175 info.read_exec_only,
1176 info.limit_in_pages,
1177 info.seg_not_present,
1181 idx = info.entry_number;
1182 if (idx != -1 && (idx < 6 || idx > 8))
1186 /* -1 means finding the first free TLS entry */
1187 for (i = 0; i < NGTLS; i++) {
1189 * try to determine if the TLS entry is empty by looking
1190 * at the lolimit entry.
1192 if (curthread->td_tls.tls[idx].sd_lolimit == 0) {
1200 * By now we should have an index. If not, it means
1201 * that no entry is free, so return ESRCH.
1206 /* translate the index from Linux to ours */
1211 /* Tell the caller about the allocated entry number */
1213 info.entry_number = GTLS_START + mycpu->gd_cpuid * NGDT + idx;
1215 info.entry_number = GTLS_START + idx;
1218 error = copyout(&info, args->desc, sizeof(struct l_user_desc));
1222 if (LINUX_LDT_empty(&info)) {
1226 a[0] = LINUX_LDT_entry_a(&info);
1227 a[1] = LINUX_LDT_entry_b(&info);
1231 * Update the TLS and the TLS entries in the GDT, but hold a critical
1232 * section as required by set_user_TLS().
1235 desc = &curthread->td_tls.tls[idx];
1236 memcpy(desc, &a, sizeof(a));
1244 sys_linux_get_thread_area(struct linux_get_thread_area_args *args)
1246 struct segment_descriptor *sd;
1247 struct l_desc_struct desc;
1248 struct l_user_desc info;
1253 if (ldebug(get_thread_area))
1254 kprintf(ARGS(get_thread_area, "%p"), args->desc);
1257 error = copyin(args->desc, &info, sizeof(struct l_user_desc));
1261 idx = info.entry_number;
1262 if ((idx < 6 || idx > 8) && (idx < GTLS_START)) {
1263 kprintf("sys_linux_get_thread_area, invalid idx requested: %d\n", idx);
1267 memset(&info, 0, sizeof(info));
1269 /* translate the index from Linux to ours */
1270 info.entry_number = idx;
1271 if (idx < GTLS_START) {
1275 idx -= (GTLS_START + mycpu->gd_cpuid * NGDT);
1282 sd = &curthread->td_tls.tls[idx];
1283 memcpy(&desc, sd, sizeof(desc));
1284 info.base_addr = LINUX_GET_BASE(&desc);
1285 info.limit = LINUX_GET_LIMIT(&desc);
1286 info.seg_32bit = LINUX_GET_32BIT(&desc);
1287 info.contents = LINUX_GET_CONTENTS(&desc);
1288 info.read_exec_only = !LINUX_GET_WRITABLE(&desc);
1289 info.limit_in_pages = LINUX_GET_LIMIT_PAGES(&desc);
1290 info.seg_not_present = !LINUX_GET_PRESENT(&desc);
1291 info.useable = LINUX_GET_USEABLE(&desc);
1293 error = copyout(&info, args->desc, sizeof(struct l_user_desc));