acd3428b7d
specific privilege names to a broad range of privileges. These may require some future tweaking. Sponsored by: nCircle Network Security, Inc. Obtained from: TrustedBSD Project Discussed on: arch@ Reviewed (at least in part) by: mlaier, jmg, pjd, bde, ceri, Alex Lyashkov <umka at sevcity dot net>, Skip Ford <skip dot ford at verizon dot net>, Antoine Brodin <antoine dot brodin at laposte dot net>
1274 lines
31 KiB
C
1274 lines
31 KiB
C
/*-
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* Copyright (c) 2000 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/file.h>
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#include <sys/fcntl.h>
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#include <sys/imgact.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/resource.h>
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#include <sys/resourcevar.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include <sys/unistd.h>
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#include <sys/wait.h>
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#include <machine/frame.h>
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#include <machine/psl.h>
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <i386/linux/linux.h>
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#include <i386/linux/linux_proto.h>
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#include <compat/linux/linux_ipc.h>
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#include <compat/linux/linux_signal.h>
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#include <compat/linux/linux_util.h>
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#include <compat/linux/linux_emul.h>
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#include <i386/include/pcb.h> /* needed for pcb definition in linux_set_thread_area */
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#include "opt_posix.h"
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extern struct sysentvec elf32_freebsd_sysvec; /* defined in i386/i386/elf_machdep.c */
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struct l_descriptor {
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l_uint entry_number;
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l_ulong base_addr;
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l_uint limit;
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l_uint seg_32bit:1;
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l_uint contents:2;
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l_uint read_exec_only:1;
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l_uint limit_in_pages:1;
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l_uint seg_not_present:1;
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l_uint useable:1;
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};
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struct l_old_select_argv {
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l_int nfds;
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l_fd_set *readfds;
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l_fd_set *writefds;
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l_fd_set *exceptfds;
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struct l_timeval *timeout;
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};
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int
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linux_to_bsd_sigaltstack(int lsa)
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{
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int bsa = 0;
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if (lsa & LINUX_SS_DISABLE)
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bsa |= SS_DISABLE;
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if (lsa & LINUX_SS_ONSTACK)
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bsa |= SS_ONSTACK;
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return (bsa);
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}
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int
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bsd_to_linux_sigaltstack(int bsa)
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{
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int lsa = 0;
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if (bsa & SS_DISABLE)
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lsa |= LINUX_SS_DISABLE;
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if (bsa & SS_ONSTACK)
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lsa |= LINUX_SS_ONSTACK;
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return (lsa);
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}
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int
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linux_execve(struct thread *td, struct linux_execve_args *args)
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{
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int error;
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char *newpath;
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struct image_args eargs;
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LCONVPATHEXIST(td, args->path, &newpath);
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#ifdef DEBUG
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if (ldebug(execve))
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printf(ARGS(execve, "%s"), newpath);
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#endif
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error = exec_copyin_args(&eargs, newpath, UIO_SYSSPACE,
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args->argp, args->envp);
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free(newpath, M_TEMP);
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if (error == 0)
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error = kern_execve(td, &eargs, NULL);
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if (error == 0)
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/* linux process can exec fbsd one, dont attempt
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* to create emuldata for such process using
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* linux_proc_init, this leads to a panic on KASSERT
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* because such process has p->p_emuldata == NULL
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*/
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if (td->td_proc->p_sysent == &elf_linux_sysvec)
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error = linux_proc_init(td, 0, 0);
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return (error);
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}
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struct l_ipc_kludge {
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struct l_msgbuf *msgp;
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l_long msgtyp;
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};
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int
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linux_ipc(struct thread *td, struct linux_ipc_args *args)
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{
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switch (args->what & 0xFFFF) {
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case LINUX_SEMOP: {
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struct linux_semop_args a;
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a.semid = args->arg1;
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a.tsops = args->ptr;
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a.nsops = args->arg2;
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return (linux_semop(td, &a));
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}
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case LINUX_SEMGET: {
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struct linux_semget_args a;
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a.key = args->arg1;
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a.nsems = args->arg2;
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a.semflg = args->arg3;
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return (linux_semget(td, &a));
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}
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case LINUX_SEMCTL: {
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struct linux_semctl_args a;
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int error;
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a.semid = args->arg1;
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a.semnum = args->arg2;
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a.cmd = args->arg3;
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error = copyin(args->ptr, &a.arg, sizeof(a.arg));
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if (error)
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return (error);
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return (linux_semctl(td, &a));
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}
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case LINUX_MSGSND: {
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struct linux_msgsnd_args a;
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a.msqid = args->arg1;
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a.msgp = args->ptr;
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a.msgsz = args->arg2;
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a.msgflg = args->arg3;
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return (linux_msgsnd(td, &a));
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}
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case LINUX_MSGRCV: {
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struct linux_msgrcv_args a;
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a.msqid = args->arg1;
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a.msgsz = args->arg2;
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a.msgflg = args->arg3;
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if ((args->what >> 16) == 0) {
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struct l_ipc_kludge tmp;
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int error;
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if (args->ptr == NULL)
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return (EINVAL);
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error = copyin(args->ptr, &tmp, sizeof(tmp));
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if (error)
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return (error);
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a.msgp = tmp.msgp;
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a.msgtyp = tmp.msgtyp;
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} else {
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a.msgp = args->ptr;
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a.msgtyp = args->arg5;
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}
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return (linux_msgrcv(td, &a));
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}
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case LINUX_MSGGET: {
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struct linux_msgget_args a;
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a.key = args->arg1;
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a.msgflg = args->arg2;
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return (linux_msgget(td, &a));
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}
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case LINUX_MSGCTL: {
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struct linux_msgctl_args a;
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a.msqid = args->arg1;
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a.cmd = args->arg2;
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a.buf = args->ptr;
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return (linux_msgctl(td, &a));
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}
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case LINUX_SHMAT: {
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struct linux_shmat_args a;
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a.shmid = args->arg1;
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a.shmaddr = args->ptr;
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a.shmflg = args->arg2;
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a.raddr = (l_ulong *)args->arg3;
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return (linux_shmat(td, &a));
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}
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case LINUX_SHMDT: {
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struct linux_shmdt_args a;
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a.shmaddr = args->ptr;
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return (linux_shmdt(td, &a));
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}
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case LINUX_SHMGET: {
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struct linux_shmget_args a;
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a.key = args->arg1;
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a.size = args->arg2;
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a.shmflg = args->arg3;
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return (linux_shmget(td, &a));
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}
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case LINUX_SHMCTL: {
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struct linux_shmctl_args a;
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a.shmid = args->arg1;
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a.cmd = args->arg2;
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a.buf = args->ptr;
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return (linux_shmctl(td, &a));
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}
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default:
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break;
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}
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return (EINVAL);
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}
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int
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linux_old_select(struct thread *td, struct linux_old_select_args *args)
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{
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struct l_old_select_argv linux_args;
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struct linux_select_args newsel;
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int error;
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#ifdef DEBUG
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if (ldebug(old_select))
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printf(ARGS(old_select, "%p"), args->ptr);
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#endif
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error = copyin(args->ptr, &linux_args, sizeof(linux_args));
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if (error)
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return (error);
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newsel.nfds = linux_args.nfds;
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newsel.readfds = linux_args.readfds;
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newsel.writefds = linux_args.writefds;
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newsel.exceptfds = linux_args.exceptfds;
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newsel.timeout = linux_args.timeout;
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return (linux_select(td, &newsel));
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}
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int
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linux_fork(struct thread *td, struct linux_fork_args *args)
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{
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int error;
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#ifdef DEBUG
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if (ldebug(fork))
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printf(ARGS(fork, ""));
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#endif
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if ((error = fork(td, (struct fork_args *)args)) != 0)
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return (error);
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if (td->td_retval[1] == 1)
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td->td_retval[0] = 0;
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error = linux_proc_init(td, td->td_retval[0], 0);
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if (error)
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return (error);
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return (0);
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}
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int
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linux_vfork(struct thread *td, struct linux_vfork_args *args)
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{
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int error;
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struct proc *p2;
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#ifdef DEBUG
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if (ldebug(vfork))
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printf(ARGS(vfork, ""));
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#endif
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/* exclude RFPPWAIT */
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if ((error = fork1(td, RFFDG | RFPROC | RFMEM, 0, &p2)) != 0)
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return (error);
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if (error == 0) {
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td->td_retval[0] = p2->p_pid;
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td->td_retval[1] = 0;
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}
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/* Are we the child? */
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if (td->td_retval[1] == 1)
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td->td_retval[0] = 0;
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error = linux_proc_init(td, td->td_retval[0], 0);
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if (error)
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return (error);
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/* wait for the children to exit, ie. emulate vfork */
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PROC_LOCK(p2);
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while (p2->p_flag & P_PPWAIT)
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msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
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PROC_UNLOCK(p2);
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return (0);
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}
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int
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linux_clone(struct thread *td, struct linux_clone_args *args)
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{
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int error, ff = RFPROC | RFSTOPPED;
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struct proc *p2;
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struct thread *td2;
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int exit_signal;
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struct linux_emuldata *em;
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#ifdef DEBUG
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if (ldebug(clone)) {
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printf(ARGS(clone, "flags %x, stack %x, parent tid: %x, child tid: %x"),
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(unsigned int)args->flags, (unsigned int)args->stack,
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(unsigned int)args->parent_tidptr, (unsigned int)args->child_tidptr);
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}
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#endif
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exit_signal = args->flags & 0x000000ff;
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if (!LINUX_SIG_VALID(exit_signal) && exit_signal != 0)
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return (EINVAL);
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if (exit_signal <= LINUX_SIGTBLSZ)
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exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
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if (args->flags & CLONE_VM)
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ff |= RFMEM;
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if (args->flags & CLONE_SIGHAND)
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ff |= RFSIGSHARE;
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/*
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* XXX: in linux sharing of fs info (chroot/cwd/umask)
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* and open files is independant. in fbsd its in one
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* structure but in reality it doesnt make any problems
|
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* because both this flags are set at once usually.
|
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*/
|
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if (!(args->flags & (CLONE_FILES | CLONE_FS)))
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ff |= RFFDG;
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|
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/*
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* Attempt to detect when linux_clone(2) is used for creating
|
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* kernel threads. Unfortunately despite the existence of the
|
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* CLONE_THREAD flag, version of linuxthreads package used in
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* most popular distros as of beginning of 2005 doesn't make
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* any use of it. Therefore, this detection relay fully on
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* empirical observation that linuxthreads sets certain
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* combination of flags, so that we can make more or less
|
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* precise detection and notify the FreeBSD kernel that several
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* processes are in fact part of the same threading group, so
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* that special treatment is necessary for signal delivery
|
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* between those processes and fd locking.
|
|
*/
|
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if ((args->flags & 0xffffff00) == THREADING_FLAGS)
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ff |= RFTHREAD;
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|
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error = fork1(td, ff, 0, &p2);
|
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if (error)
|
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return (error);
|
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|
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/* create the emuldata */
|
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error = linux_proc_init(td, p2->p_pid, args->flags);
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/* reference it - no need to check this */
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em = em_find(p2, EMUL_UNLOCKED);
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KASSERT(em != NULL, ("clone: emuldata not found.\n"));
|
|
/* and adjust it */
|
|
if (args->flags & CLONE_PARENT_SETTID) {
|
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if (args->parent_tidptr == NULL) {
|
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EMUL_UNLOCK(&emul_lock);
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return (EINVAL);
|
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}
|
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error = copyout(&p2->p_pid, args->parent_tidptr, sizeof(p2->p_pid));
|
|
if (error) {
|
|
EMUL_UNLOCK(&emul_lock);
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|
return (error);
|
|
}
|
|
}
|
|
|
|
if (args->flags & (CLONE_PARENT|CLONE_THREAD)) {
|
|
sx_xlock(&proctree_lock);
|
|
PROC_LOCK(p2);
|
|
proc_reparent(p2, td->td_proc->p_pptr);
|
|
PROC_UNLOCK(p2);
|
|
sx_xunlock(&proctree_lock);
|
|
}
|
|
|
|
if (args->flags & CLONE_THREAD) {
|
|
/* XXX: linux mangles pgrp and pptr somehow
|
|
* I think it might be this but I am not sure.
|
|
*/
|
|
#ifdef notyet
|
|
PROC_LOCK(p2);
|
|
p2->p_pgrp = td->td_proc->p_pgrp;
|
|
PROC_UNLOCK(p2);
|
|
#endif
|
|
exit_signal = 0;
|
|
}
|
|
|
|
if (args->flags & CLONE_CHILD_SETTID)
|
|
em->child_set_tid = args->child_tidptr;
|
|
else
|
|
em->child_set_tid = NULL;
|
|
|
|
if (args->flags & CLONE_CHILD_CLEARTID)
|
|
em->child_clear_tid = args->child_tidptr;
|
|
else
|
|
em->child_clear_tid = NULL;
|
|
|
|
EMUL_UNLOCK(&emul_lock);
|
|
|
|
PROC_LOCK(p2);
|
|
p2->p_sigparent = exit_signal;
|
|
PROC_UNLOCK(p2);
|
|
td2 = FIRST_THREAD_IN_PROC(p2);
|
|
/*
|
|
* in a case of stack = NULL we are supposed to COW calling process stack
|
|
* this is what normal fork() does so we just keep the tf_esp arg intact
|
|
*/
|
|
if (args->stack)
|
|
td2->td_frame->tf_esp = (unsigned int)args->stack;
|
|
|
|
if (args->flags & CLONE_SETTLS) {
|
|
struct l_user_desc info;
|
|
int idx;
|
|
int a[2];
|
|
struct segment_descriptor sd;
|
|
|
|
error = copyin((void *)td->td_frame->tf_esi, &info, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (error);
|
|
|
|
idx = info.entry_number;
|
|
|
|
/*
|
|
* looks like we're getting the idx we returned
|
|
* in the set_thread_area() syscall
|
|
*/
|
|
if (idx != 6 && idx != 3)
|
|
return (EINVAL);
|
|
|
|
/* this doesnt happen in practice */
|
|
if (idx == 6) {
|
|
/* we might copy out the entry_number as 3 */
|
|
info.entry_number = 3;
|
|
error = copyout(&info, (void *) td->td_frame->tf_esi, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
a[0] = LDT_entry_a(&info);
|
|
a[1] = LDT_entry_b(&info);
|
|
|
|
memcpy(&sd, &a, sizeof(a));
|
|
#ifdef DEBUG
|
|
if (ldebug(clone))
|
|
printf("Segment created in clone with CLONE_SETTLS: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
|
|
sd.sd_hibase,
|
|
sd.sd_lolimit,
|
|
sd.sd_hilimit,
|
|
sd.sd_type,
|
|
sd.sd_dpl,
|
|
sd.sd_p,
|
|
sd.sd_xx,
|
|
sd.sd_def32,
|
|
sd.sd_gran);
|
|
#endif
|
|
|
|
/* set %gs */
|
|
td2->td_pcb->pcb_gsd = sd;
|
|
td2->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(clone))
|
|
printf(LMSG("clone: successful rfork to %ld, stack %p sig = %d"),
|
|
(long)p2->p_pid, args->stack, exit_signal);
|
|
#endif
|
|
|
|
/*
|
|
* Make this runnable after we are finished with it.
|
|
*/
|
|
mtx_lock_spin(&sched_lock);
|
|
TD_SET_CAN_RUN(td2);
|
|
setrunqueue(td2, SRQ_BORING);
|
|
mtx_unlock_spin(&sched_lock);
|
|
|
|
td->td_retval[0] = p2->p_pid;
|
|
td->td_retval[1] = 0;
|
|
|
|
if (args->flags & CLONE_VFORK) {
|
|
/* wait for the children to exit, ie. emulate vfork */
|
|
PROC_LOCK(p2);
|
|
p2->p_flag |= P_PPWAIT;
|
|
while (p2->p_flag & P_PPWAIT)
|
|
msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
|
|
PROC_UNLOCK(p2);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* XXX move */
|
|
struct l_mmap_argv {
|
|
l_caddr_t addr;
|
|
l_int len;
|
|
l_int prot;
|
|
l_int flags;
|
|
l_int fd;
|
|
l_int pos;
|
|
};
|
|
|
|
#define STACK_SIZE (2 * 1024 * 1024)
|
|
#define GUARD_SIZE (4 * PAGE_SIZE)
|
|
|
|
static int linux_mmap_common(struct thread *, struct l_mmap_argv *);
|
|
|
|
int
|
|
linux_mmap2(struct thread *td, struct linux_mmap2_args *args)
|
|
{
|
|
struct l_mmap_argv linux_args;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(mmap2))
|
|
printf(ARGS(mmap2, "%p, %d, %d, 0x%08x, %d, %d"),
|
|
(void *)args->addr, args->len, args->prot,
|
|
args->flags, args->fd, args->pgoff);
|
|
#endif
|
|
|
|
linux_args.addr = (l_caddr_t)args->addr;
|
|
linux_args.len = args->len;
|
|
linux_args.prot = args->prot;
|
|
linux_args.flags = args->flags;
|
|
linux_args.fd = args->fd;
|
|
linux_args.pos = args->pgoff * PAGE_SIZE;
|
|
|
|
return (linux_mmap_common(td, &linux_args));
|
|
}
|
|
|
|
int
|
|
linux_mmap(struct thread *td, struct linux_mmap_args *args)
|
|
{
|
|
int error;
|
|
struct l_mmap_argv linux_args;
|
|
|
|
error = copyin(args->ptr, &linux_args, sizeof(linux_args));
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(mmap))
|
|
printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
|
|
(void *)linux_args.addr, linux_args.len, linux_args.prot,
|
|
linux_args.flags, linux_args.fd, linux_args.pos);
|
|
#endif
|
|
|
|
return (linux_mmap_common(td, &linux_args));
|
|
}
|
|
|
|
static int
|
|
linux_mmap_common(struct thread *td, struct l_mmap_argv *linux_args)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct mmap_args /* {
|
|
caddr_t addr;
|
|
size_t len;
|
|
int prot;
|
|
int flags;
|
|
int fd;
|
|
long pad;
|
|
off_t pos;
|
|
} */ bsd_args;
|
|
int error;
|
|
struct file *fp;
|
|
|
|
error = 0;
|
|
bsd_args.flags = 0;
|
|
fp = NULL;
|
|
|
|
/*
|
|
* Linux mmap(2):
|
|
* You must specify exactly one of MAP_SHARED and MAP_PRIVATE
|
|
*/
|
|
if (! ((linux_args->flags & LINUX_MAP_SHARED) ^
|
|
(linux_args->flags & LINUX_MAP_PRIVATE)))
|
|
return (EINVAL);
|
|
|
|
if (linux_args->flags & LINUX_MAP_SHARED)
|
|
bsd_args.flags |= MAP_SHARED;
|
|
if (linux_args->flags & LINUX_MAP_PRIVATE)
|
|
bsd_args.flags |= MAP_PRIVATE;
|
|
if (linux_args->flags & LINUX_MAP_FIXED)
|
|
bsd_args.flags |= MAP_FIXED;
|
|
if (linux_args->flags & LINUX_MAP_ANON)
|
|
bsd_args.flags |= MAP_ANON;
|
|
else
|
|
bsd_args.flags |= MAP_NOSYNC;
|
|
if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
|
|
bsd_args.flags |= MAP_STACK;
|
|
|
|
/*
|
|
* The linux MAP_GROWSDOWN option does not limit auto
|
|
* growth of the region. Linux mmap with this option
|
|
* takes as addr the inital BOS, and as len, the initial
|
|
* region size. It can then grow down from addr without
|
|
* limit. However, linux threads has an implicit internal
|
|
* limit to stack size of STACK_SIZE. Its just not
|
|
* enforced explicitly in linux. But, here we impose
|
|
* a limit of (STACK_SIZE - GUARD_SIZE) on the stack
|
|
* region, since we can do this with our mmap.
|
|
*
|
|
* Our mmap with MAP_STACK takes addr as the maximum
|
|
* downsize limit on BOS, and as len the max size of
|
|
* the region. It them maps the top SGROWSIZ bytes,
|
|
* and autgrows the region down, up to the limit
|
|
* in addr.
|
|
*
|
|
* If we don't use the MAP_STACK option, the effect
|
|
* of this code is to allocate a stack region of a
|
|
* fixed size of (STACK_SIZE - GUARD_SIZE).
|
|
*/
|
|
|
|
/* This gives us TOS */
|
|
bsd_args.addr = linux_args->addr + linux_args->len;
|
|
|
|
if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) {
|
|
/*
|
|
* Some linux apps will attempt to mmap
|
|
* thread stacks near the top of their
|
|
* address space. If their TOS is greater
|
|
* than vm_maxsaddr, vm_map_growstack()
|
|
* will confuse the thread stack with the
|
|
* process stack and deliver a SEGV if they
|
|
* attempt to grow the thread stack past their
|
|
* current stacksize rlimit. To avoid this,
|
|
* adjust vm_maxsaddr upwards to reflect
|
|
* the current stacksize rlimit rather
|
|
* than the maximum possible stacksize.
|
|
* It would be better to adjust the
|
|
* mmap'ed region, but some apps do not check
|
|
* mmap's return value.
|
|
*/
|
|
PROC_LOCK(p);
|
|
p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
|
|
lim_cur(p, RLIMIT_STACK);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
|
|
/* This gives us our maximum stack size */
|
|
if (linux_args->len > STACK_SIZE - GUARD_SIZE)
|
|
bsd_args.len = linux_args->len;
|
|
else
|
|
bsd_args.len = STACK_SIZE - GUARD_SIZE;
|
|
|
|
/*
|
|
* This gives us a new BOS. If we're using VM_STACK, then
|
|
* mmap will just map the top SGROWSIZ bytes, and let
|
|
* the stack grow down to the limit at BOS. If we're
|
|
* not using VM_STACK we map the full stack, since we
|
|
* don't have a way to autogrow it.
|
|
*/
|
|
bsd_args.addr -= bsd_args.len;
|
|
} else {
|
|
bsd_args.addr = linux_args->addr;
|
|
bsd_args.len = linux_args->len;
|
|
}
|
|
|
|
bsd_args.prot = linux_args->prot;
|
|
if (linux_args->flags & LINUX_MAP_ANON)
|
|
bsd_args.fd = -1;
|
|
else {
|
|
/*
|
|
* Linux follows Solaris mmap(2) description:
|
|
* The file descriptor fildes is opened with
|
|
* read permission, regardless of the
|
|
* protection options specified.
|
|
* If PROT_WRITE is specified, the application
|
|
* must have opened the file descriptor
|
|
* fildes with write permission unless
|
|
* MAP_PRIVATE is specified in the flag
|
|
* argument as described below.
|
|
*/
|
|
|
|
if ((error = fget(td, linux_args->fd, &fp)) != 0)
|
|
return (error);
|
|
if (fp->f_type != DTYPE_VNODE) {
|
|
fdrop(fp, td);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Linux mmap() just fails for O_WRONLY files */
|
|
if (! (fp->f_flag & FREAD)) {
|
|
fdrop(fp, td);
|
|
return (EACCES);
|
|
}
|
|
|
|
bsd_args.fd = linux_args->fd;
|
|
fdrop(fp, td);
|
|
}
|
|
bsd_args.pos = linux_args->pos;
|
|
bsd_args.pad = 0;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(mmap))
|
|
printf("-> %s(%p, %d, %d, 0x%08x, %d, 0x%x)\n",
|
|
__func__,
|
|
(void *)bsd_args.addr, bsd_args.len, bsd_args.prot,
|
|
bsd_args.flags, bsd_args.fd, (int)bsd_args.pos);
|
|
#endif
|
|
error = mmap(td, &bsd_args);
|
|
#ifdef DEBUG
|
|
if (ldebug(mmap))
|
|
printf("-> %s() return: 0x%x (0x%08x)\n",
|
|
__func__, error, (u_int)td->td_retval[0]);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_pipe(struct thread *td, struct linux_pipe_args *args)
|
|
{
|
|
int error;
|
|
int reg_edx;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(pipe))
|
|
printf(ARGS(pipe, "*"));
|
|
#endif
|
|
|
|
reg_edx = td->td_retval[1];
|
|
error = pipe(td, 0);
|
|
if (error) {
|
|
td->td_retval[1] = reg_edx;
|
|
return (error);
|
|
}
|
|
|
|
error = copyout(td->td_retval, args->pipefds, 2*sizeof(int));
|
|
if (error) {
|
|
td->td_retval[1] = reg_edx;
|
|
return (error);
|
|
}
|
|
|
|
td->td_retval[1] = reg_edx;
|
|
td->td_retval[0] = 0;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_ioperm(struct thread *td, struct linux_ioperm_args *args)
|
|
{
|
|
int error;
|
|
struct i386_ioperm_args iia;
|
|
|
|
iia.start = args->start;
|
|
iia.length = args->length;
|
|
iia.enable = args->enable;
|
|
mtx_lock(&Giant);
|
|
error = i386_set_ioperm(td, &iia);
|
|
mtx_unlock(&Giant);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_iopl(struct thread *td, struct linux_iopl_args *args)
|
|
{
|
|
int error;
|
|
|
|
if (args->level < 0 || args->level > 3)
|
|
return (EINVAL);
|
|
if ((error = priv_check(td, PRIV_IO)) != 0)
|
|
return (error);
|
|
if ((error = securelevel_gt(td->td_ucred, 0)) != 0)
|
|
return (error);
|
|
td->td_frame->tf_eflags = (td->td_frame->tf_eflags & ~PSL_IOPL) |
|
|
(args->level * (PSL_IOPL / 3));
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_modify_ldt(struct thread *td, struct linux_modify_ldt_args *uap)
|
|
{
|
|
int error;
|
|
struct i386_ldt_args ldt;
|
|
struct l_descriptor ld;
|
|
union descriptor desc;
|
|
|
|
if (uap->ptr == NULL)
|
|
return (EINVAL);
|
|
|
|
switch (uap->func) {
|
|
case 0x00: /* read_ldt */
|
|
ldt.start = 0;
|
|
ldt.descs = uap->ptr;
|
|
ldt.num = uap->bytecount / sizeof(union descriptor);
|
|
mtx_lock(&Giant);
|
|
error = i386_get_ldt(td, &ldt);
|
|
td->td_retval[0] *= sizeof(union descriptor);
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
case 0x01: /* write_ldt */
|
|
case 0x11: /* write_ldt */
|
|
if (uap->bytecount != sizeof(ld))
|
|
return (EINVAL);
|
|
|
|
error = copyin(uap->ptr, &ld, sizeof(ld));
|
|
if (error)
|
|
return (error);
|
|
|
|
ldt.start = ld.entry_number;
|
|
ldt.descs = &desc;
|
|
ldt.num = 1;
|
|
desc.sd.sd_lolimit = (ld.limit & 0x0000ffff);
|
|
desc.sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
|
|
desc.sd.sd_lobase = (ld.base_addr & 0x00ffffff);
|
|
desc.sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
|
|
desc.sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
|
|
(ld.contents << 2);
|
|
desc.sd.sd_dpl = 3;
|
|
desc.sd.sd_p = (ld.seg_not_present ^ 1);
|
|
desc.sd.sd_xx = 0;
|
|
desc.sd.sd_def32 = ld.seg_32bit;
|
|
desc.sd.sd_gran = ld.limit_in_pages;
|
|
mtx_lock(&Giant);
|
|
error = i386_set_ldt(td, &ldt, &desc);
|
|
mtx_unlock(&Giant);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (error == EOPNOTSUPP) {
|
|
printf("linux: modify_ldt needs kernel option USER_LDT\n");
|
|
error = ENOSYS;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_sigaction(struct thread *td, struct linux_sigaction_args *args)
|
|
{
|
|
l_osigaction_t osa;
|
|
l_sigaction_t act, oact;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(sigaction))
|
|
printf(ARGS(sigaction, "%d, %p, %p"),
|
|
args->sig, (void *)args->nsa, (void *)args->osa);
|
|
#endif
|
|
|
|
if (args->nsa != NULL) {
|
|
error = copyin(args->nsa, &osa, sizeof(l_osigaction_t));
|
|
if (error)
|
|
return (error);
|
|
act.lsa_handler = osa.lsa_handler;
|
|
act.lsa_flags = osa.lsa_flags;
|
|
act.lsa_restorer = osa.lsa_restorer;
|
|
LINUX_SIGEMPTYSET(act.lsa_mask);
|
|
act.lsa_mask.__bits[0] = osa.lsa_mask;
|
|
}
|
|
|
|
error = linux_do_sigaction(td, args->sig, args->nsa ? &act : NULL,
|
|
args->osa ? &oact : NULL);
|
|
|
|
if (args->osa != NULL && !error) {
|
|
osa.lsa_handler = oact.lsa_handler;
|
|
osa.lsa_flags = oact.lsa_flags;
|
|
osa.lsa_restorer = oact.lsa_restorer;
|
|
osa.lsa_mask = oact.lsa_mask.__bits[0];
|
|
error = copyout(&osa, args->osa, sizeof(l_osigaction_t));
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Linux has two extra args, restart and oldmask. We dont use these,
|
|
* but it seems that "restart" is actually a context pointer that
|
|
* enables the signal to happen with a different register set.
|
|
*/
|
|
int
|
|
linux_sigsuspend(struct thread *td, struct linux_sigsuspend_args *args)
|
|
{
|
|
sigset_t sigmask;
|
|
l_sigset_t mask;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(sigsuspend))
|
|
printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
|
|
#endif
|
|
|
|
LINUX_SIGEMPTYSET(mask);
|
|
mask.__bits[0] = args->mask;
|
|
linux_to_bsd_sigset(&mask, &sigmask);
|
|
return (kern_sigsuspend(td, sigmask));
|
|
}
|
|
|
|
int
|
|
linux_rt_sigsuspend(struct thread *td, struct linux_rt_sigsuspend_args *uap)
|
|
{
|
|
l_sigset_t lmask;
|
|
sigset_t sigmask;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(rt_sigsuspend))
|
|
printf(ARGS(rt_sigsuspend, "%p, %d"),
|
|
(void *)uap->newset, uap->sigsetsize);
|
|
#endif
|
|
|
|
if (uap->sigsetsize != sizeof(l_sigset_t))
|
|
return (EINVAL);
|
|
|
|
error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
|
|
if (error)
|
|
return (error);
|
|
|
|
linux_to_bsd_sigset(&lmask, &sigmask);
|
|
return (kern_sigsuspend(td, sigmask));
|
|
}
|
|
|
|
int
|
|
linux_pause(struct thread *td, struct linux_pause_args *args)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
sigset_t sigmask;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(pause))
|
|
printf(ARGS(pause, ""));
|
|
#endif
|
|
|
|
PROC_LOCK(p);
|
|
sigmask = td->td_sigmask;
|
|
PROC_UNLOCK(p);
|
|
return (kern_sigsuspend(td, sigmask));
|
|
}
|
|
|
|
int
|
|
linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap)
|
|
{
|
|
stack_t ss, oss;
|
|
l_stack_t lss;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(sigaltstack))
|
|
printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
|
|
#endif
|
|
|
|
if (uap->uss != NULL) {
|
|
error = copyin(uap->uss, &lss, sizeof(l_stack_t));
|
|
if (error)
|
|
return (error);
|
|
|
|
ss.ss_sp = lss.ss_sp;
|
|
ss.ss_size = lss.ss_size;
|
|
ss.ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
|
|
}
|
|
error = kern_sigaltstack(td, (uap->uss != NULL) ? &ss : NULL,
|
|
(uap->uoss != NULL) ? &oss : NULL);
|
|
if (!error && uap->uoss != NULL) {
|
|
lss.ss_sp = oss.ss_sp;
|
|
lss.ss_size = oss.ss_size;
|
|
lss.ss_flags = bsd_to_linux_sigaltstack(oss.ss_flags);
|
|
error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
|
|
{
|
|
struct ftruncate_args sa;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(ftruncate64))
|
|
printf(ARGS(ftruncate64, "%u, %jd"), args->fd,
|
|
(intmax_t)args->length);
|
|
#endif
|
|
|
|
sa.fd = args->fd;
|
|
sa.pad = 0;
|
|
sa.length = args->length;
|
|
return ftruncate(td, &sa);
|
|
}
|
|
|
|
int
|
|
linux_set_thread_area(struct thread *td, struct linux_set_thread_area_args *args)
|
|
{
|
|
struct l_user_desc info;
|
|
int error;
|
|
int idx;
|
|
int a[2];
|
|
struct segment_descriptor sd;
|
|
|
|
error = copyin(args->desc, &info, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(set_thread_area))
|
|
printf(ARGS(set_thread_area, "%i, %x, %x, %i, %i, %i, %i, %i, %i\n"),
|
|
info.entry_number,
|
|
info.base_addr,
|
|
info.limit,
|
|
info.seg_32bit,
|
|
info.contents,
|
|
info.read_exec_only,
|
|
info.limit_in_pages,
|
|
info.seg_not_present,
|
|
info.useable);
|
|
#endif
|
|
|
|
idx = info.entry_number;
|
|
/*
|
|
* Semantics of linux version: every thread in the system has array
|
|
* of 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This
|
|
* syscall loads one of the selected tls decriptors with a value
|
|
* and also loads GDT descriptors 6, 7 and 8 with the content of the per-thread
|
|
* descriptors.
|
|
*
|
|
* Semantics of fbsd version: I think we can ignore that linux has 3 per-thread
|
|
* descriptors and use just the 1st one. The tls_array[] is used only in
|
|
* set/get-thread_area() syscalls and for loading the GDT descriptors. In fbsd
|
|
* we use just one GDT descriptor for TLS so we will load just one.
|
|
* XXX: this doesnt work when user-space process tries to use more then 1 TLS segment
|
|
* comment in the linux sources says wine might do that.
|
|
*/
|
|
|
|
/*
|
|
* we support just GLIBC TLS now
|
|
* we should let 3 proceed as well because we use this segment so
|
|
* if code does two subsequent calls it should succeed
|
|
*/
|
|
if (idx != 6 && idx != -1 && idx != 3)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* we have to copy out the GDT entry we use
|
|
* FreeBSD uses GDT entry #3 for storing %gs so load that
|
|
* XXX: what if userspace program doesnt check this value and tries
|
|
* to use 6, 7 or 8?
|
|
*/
|
|
idx = info.entry_number = 3;
|
|
error = copyout(&info, args->desc, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (error);
|
|
|
|
if (LDT_empty(&info)) {
|
|
a[0] = 0;
|
|
a[1] = 0;
|
|
} else {
|
|
a[0] = LDT_entry_a(&info);
|
|
a[1] = LDT_entry_b(&info);
|
|
}
|
|
|
|
memcpy(&sd, &a, sizeof(a));
|
|
#ifdef DEBUG
|
|
if (ldebug(set_thread_area))
|
|
printf("Segment created in set_thread_area: lobase: %x, hibase: %x, lolimit: %x, hilimit: %x, type: %i, dpl: %i, p: %i, xx: %i, def32: %i, gran: %i\n", sd.sd_lobase,
|
|
sd.sd_hibase,
|
|
sd.sd_lolimit,
|
|
sd.sd_hilimit,
|
|
sd.sd_type,
|
|
sd.sd_dpl,
|
|
sd.sd_p,
|
|
sd.sd_xx,
|
|
sd.sd_def32,
|
|
sd.sd_gran);
|
|
#endif
|
|
|
|
/* this is taken from i386 version of cpu_set_user_tls() */
|
|
critical_enter();
|
|
/* set %gs */
|
|
td->td_pcb->pcb_gsd = sd;
|
|
PCPU_GET(fsgs_gdt)[1] = sd;
|
|
load_gs(GSEL(GUGS_SEL, SEL_UPL));
|
|
critical_exit();
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_get_thread_area(struct thread *td, struct linux_get_thread_area_args *args)
|
|
{
|
|
|
|
struct l_user_desc info;
|
|
int error;
|
|
int idx;
|
|
struct l_desc_struct desc;
|
|
struct segment_descriptor sd;
|
|
|
|
#ifdef DEBUG
|
|
if (ldebug(get_thread_area))
|
|
printf(ARGS(get_thread_area, "%p"), args->desc);
|
|
#endif
|
|
|
|
error = copyin(args->desc, &info, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (error);
|
|
|
|
idx = info.entry_number;
|
|
/* XXX: I am not sure if we want 3 to be allowed too. */
|
|
if (idx != 6 && idx != 3)
|
|
return (EINVAL);
|
|
|
|
idx = 3;
|
|
|
|
memset(&info, 0, sizeof(info));
|
|
|
|
sd = PCPU_GET(fsgs_gdt)[1];
|
|
|
|
memcpy(&desc, &sd, sizeof(desc));
|
|
|
|
info.entry_number = idx;
|
|
info.base_addr = GET_BASE(&desc);
|
|
info.limit = GET_LIMIT(&desc);
|
|
info.seg_32bit = GET_32BIT(&desc);
|
|
info.contents = GET_CONTENTS(&desc);
|
|
info.read_exec_only = !GET_WRITABLE(&desc);
|
|
info.limit_in_pages = GET_LIMIT_PAGES(&desc);
|
|
info.seg_not_present = !GET_PRESENT(&desc);
|
|
info.useable = GET_USEABLE(&desc);
|
|
|
|
error = copyout(&info, args->desc, sizeof(struct l_user_desc));
|
|
if (error)
|
|
return (EFAULT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* copied from kern/kern_time.c */
|
|
int
|
|
linux_timer_create(struct thread *td, struct linux_timer_create_args *args)
|
|
{
|
|
return ktimer_create(td, (struct ktimer_create_args *) args);
|
|
}
|
|
|
|
int
|
|
linux_timer_settime(struct thread *td, struct linux_timer_settime_args *args)
|
|
{
|
|
return ktimer_settime(td, (struct ktimer_settime_args *) args);
|
|
}
|
|
|
|
int
|
|
linux_timer_gettime(struct thread *td, struct linux_timer_gettime_args *args)
|
|
{
|
|
return ktimer_gettime(td, (struct ktimer_gettime_args *) args);
|
|
}
|
|
|
|
int
|
|
linux_timer_getoverrun(struct thread *td, struct linux_timer_getoverrun_args *args)
|
|
{
|
|
return ktimer_getoverrun(td, (struct ktimer_getoverrun_args *) args);
|
|
}
|
|
|
|
int
|
|
linux_timer_delete(struct thread *td, struct linux_timer_delete_args *args)
|
|
{
|
|
return ktimer_delete(td, (struct ktimer_delete_args *) args);
|
|
}
|
|
|
|
/* XXX: this wont work with module - convert it */
|
|
int
|
|
linux_mq_open(struct thread *td, struct linux_mq_open_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_open(td, (struct kmq_open_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
linux_mq_unlink(struct thread *td, struct linux_mq_unlink_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_unlink(td, (struct kmq_unlink_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
linux_mq_timedsend(struct thread *td, struct linux_mq_timedsend_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_timedsend(td, (struct kmq_timedsend_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
linux_mq_timedreceive(struct thread *td, struct linux_mq_timedreceive_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_timedreceive(td, (struct kmq_timedreceive_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
linux_mq_notify(struct thread *td, struct linux_mq_notify_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_notify(td, (struct kmq_notify_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
linux_mq_getsetattr(struct thread *td, struct linux_mq_getsetattr_args *args)
|
|
{
|
|
#ifdef P1003_1B_MQUEUE
|
|
return kmq_setattr(td, (struct kmq_setattr_args *) args);
|
|
#else
|
|
return (ENOSYS);
|
|
#endif
|
|
}
|
|
|