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https://git.FreeBSD.org/src.git
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418 lines
10 KiB
C
418 lines
10 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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/mman.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysproto.h>
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#include <sys/unistd.h>
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#include <sys/user.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 <alpha/linux/linux.h>
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#include <alpha/linux/linux_proto.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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struct linux_select_argv {
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int nfds;
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fd_set *readfds;
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fd_set *writefds;
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fd_set *exceptfds;
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struct timeval *timeout;
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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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struct execve_args bsd;
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caddr_t sg;
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sg = stackgap_init();
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CHECKALTEXIST(td, &sg, args->path);
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#ifdef DEBUG
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if (ldebug(execve))
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printf(ARGS(execve, "%s"), args->path);
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#endif
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bsd.fname = args->path;
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bsd.argv = args->argp;
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bsd.envv = args->envp;
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return (execve(td, &bsd));
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}
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/*
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* MPSAFE
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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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return (0);
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}
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/*
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* MPSAFE
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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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#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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if ((error = vfork(td, (struct vfork_args *)args)) != 0)
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return (error);
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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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return (0);
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}
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#define CLONE_VM 0x100
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#define CLONE_FS 0x200
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#define CLONE_FILES 0x400
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#define CLONE_SIGHAND 0x800
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#define CLONE_PID 0x1000
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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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int exit_signal;
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vm_offset_t start;
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#ifdef DEBUG
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if (ldebug(clone)) {
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printf(ARGS(clone, "flags %x, stack %x"),
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(unsigned int)args->flags, (unsigned int)args->stack);
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if (args->flags & CLONE_PID)
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printf(LMSG("CLONE_PID not yet supported"));
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}
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#endif
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if (!args->stack)
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return (EINVAL);
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exit_signal = args->flags & 0x000000ff;
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if (exit_signal >= LINUX_NSIG)
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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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*/
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/* RFTHREAD probably not necessary here, but it shouldn't hurt */
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ff |= RFTHREAD;
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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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if (!(args->flags & CLONE_FILES))
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ff |= RFFDG;
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error = 0;
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start = 0;
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if ((error = fork1(td, ff, &p2)) != 0)
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return (error);
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PROC_LOCK(p2);
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p2->p_sigparent = exit_signal;
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PROC_UNLOCK(p2);
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p2->p_thread.td_pcb->pcb_hw.apcb_usp = (unsigned long)args->stack;
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#ifdef DEBUG
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if (ldebug(clone))
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printf(LMSG("clone: successful rfork to %ld, stack %p sig = %d"),
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(long)p2->p_pid, args->stack, exit_signal);
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#endif
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/*
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* Make this runnable after we are finished with it.
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*/
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mtx_lock_spin(&sched_lock);
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p2->p_stat = SRUN;
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setrunqueue(&p2->p_thread);
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mtx_unlock_spin(&sched_lock);
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td->td_retval[0] = p2->p_pid;
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td->td_retval[1] = 0;
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return (0);
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}
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#define STACK_SIZE (2 * 1024 * 1024)
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#define GUARD_SIZE (4 * PAGE_SIZE)
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int
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linux_mmap(struct thread *td, struct linux_mmap_args *linux_args)
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{
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struct mmap_args /* {
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caddr_t addr;
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size_t len;
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int prot;
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int flags;
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int fd;
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long pad;
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off_t pos;
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} */ bsd_args;
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int error;
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#ifdef DEBUG
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if (ldebug(mmap))
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printf(ARGS(mmap, "%p, 0x%lx, 0x%x, 0x%x, 0x%x, 0x%lx"),
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(void *)linux_args->addr, linux_args->len,
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linux_args->prot, linux_args->flags, linux_args->fd,
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linux_args->pos);
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#endif
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bsd_args.prot = linux_args->prot | PROT_READ; /* always required */
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bsd_args.flags = 0;
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if (linux_args->flags & LINUX_MAP_SHARED)
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bsd_args.flags |= MAP_SHARED;
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if (linux_args->flags & LINUX_MAP_PRIVATE)
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bsd_args.flags |= MAP_PRIVATE;
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if (linux_args->flags & LINUX_MAP_FIXED){
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bsd_args.flags |= MAP_FIXED;
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bsd_args.pos = trunc_page(linux_args->pos);
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} else {
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bsd_args.pos = linux_args->pos;
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}
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if (linux_args->flags & LINUX_MAP_ANON)
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bsd_args.flags |= MAP_ANON;
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if (linux_args->flags & LINUX_MAP_GROWSDOWN) {
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bsd_args.flags |= MAP_STACK;
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/* The linux MAP_GROWSDOWN option does not limit auto
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* growth of the region. Linux mmap with this option
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* takes as addr the inital BOS, and as len, the initial
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* region size. It can then grow down from addr without
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* limit. However, linux threads has an implicit internal
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* limit to stack size of STACK_SIZE. Its just not
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* enforced explicitly in linux. But, here we impose
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* a limit of (STACK_SIZE - GUARD_SIZE) on the stack
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* region, since we can do this with our mmap.
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*
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* Our mmap with MAP_STACK takes addr as the maximum
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* downsize limit on BOS, and as len the max size of
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* the region. It them maps the top SGROWSIZ bytes,
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* and autgrows the region down, up to the limit
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* in addr.
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*
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* If we don't use the MAP_STACK option, the effect
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* of this code is to allocate a stack region of a
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* fixed size of (STACK_SIZE - GUARD_SIZE).
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*/
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/* This gives us TOS */
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bsd_args.addr = (caddr_t)(linux_args->addr + linux_args->len);
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/* This gives us our maximum stack size */
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if (linux_args->len > STACK_SIZE - GUARD_SIZE)
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bsd_args.len = linux_args->len;
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else
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bsd_args.len = STACK_SIZE - GUARD_SIZE;
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/* This gives us a new BOS. If we're using VM_STACK, then
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* mmap will just map the top SGROWSIZ bytes, and let
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* the stack grow down to the limit at BOS. If we're
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* not using VM_STACK we map the full stack, since we
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* don't have a way to autogrow it.
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*/
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bsd_args.addr -= bsd_args.len;
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bsd_args.addr = (caddr_t)round_page(bsd_args.addr); /* XXXX */
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} else {
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bsd_args.addr = (caddr_t)linux_args->addr;
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bsd_args.len = linux_args->len;
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}
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bsd_args.fd = linux_args->fd;
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if(linux_args->fd == 0)
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bsd_args.fd = -1;
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bsd_args.pad = 0;
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#ifdef DEBUG
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if (ldebug(mmap))
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printf(ARGS(mmap, "%p, 0x%lx, 0x%x, 0x%x, 0x%x, 0x%lx)",
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(void *)bsd_args.addr,
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bsd_args.len,
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bsd_args.prot,
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bsd_args.flags,
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bsd_args.fd,
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bsd_args.pos);
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#endif
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if (bsd_args.addr == 0)
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bsd_args.addr = (caddr_t)0x40000000UL;
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error = mmap(td, &bsd_args);
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#ifdef DEBUG
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if (ldebug(mmap))
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printf(LMSG("mmap returns %d, 0x%lx", error, td->td_retval[0]);
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#endif
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return (error);
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}
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int
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linux_rt_sigsuspend(td, uap)
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struct thread *td;
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struct linux_rt_sigsuspend_args *uap;
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{
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int error;
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l_sigset_t lmask;
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sigset_t *bmask;
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struct sigsuspend_args bsd;
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caddr_t sg;
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sg = stackgap_init();
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#ifdef DEBUG
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if (ldebug(rt_sigsuspend))
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printf(ARGS(rt_sigsuspend, "%p, %d"),
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(void *)uap->newset, uap->sigsetsize);
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#endif
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if (uap->sigsetsize != sizeof(l_sigset_t))
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return (EINVAL);
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error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
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if (error)
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return (error);
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bmask = stackgap_alloc(&sg, sizeof(sigset_t));
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linux_to_bsd_sigset(&lmask, bmask);
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bsd.sigmask = bmask;
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return (sigsuspend(td, &bsd));
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}
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int
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linux_mprotect(td, uap)
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struct thread *td;
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struct linux_mprotect_args *uap;
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{
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#ifdef DEBUG
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if (ldebug(mprotect))
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printf(ARGS(mprotect, "%p, 0x%lx, 0x%x)",
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(void *)uap->addr, uap->len, uap->prot);
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#endif
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return (mprotect(td, (void *)uap));
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}
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int
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linux_munmap(td, uap)
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struct thread *td;
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struct linux_munmap_args *uap;
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{
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#ifdef DEBUG
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if (ldebug(munmap))
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printf(ARGS(munmap, "%p, 0x%lx",
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(void *)uap->addr, uap->len);
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#endif
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return (munmap(td, (void *)uap));
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}
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static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
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RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
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RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NOFILE, -1,
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RLIMIT_NPROC, RLIMIT_MEMLOCK
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};
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int
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linux_setrlimit(td, uap)
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struct thread *td;
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struct linux_setrlimit_args *uap;
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{
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struct rlimit rlim;
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u_int which;
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int error;
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#ifdef DEBUG
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if (ldebug(setrlimit))
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printf(ARGS(setrlimit, "%d, %p"),
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uap->resource, (void *)uap->rlim);
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#endif
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if (uap->resource >= LINUX_RLIM_NLIMITS)
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return EINVAL;
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which = linux_to_bsd_resource[uap->resource];
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if (which == -1)
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return EINVAL;
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if ((error =
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copyin((caddr_t)uap->rlim, (caddr_t)&rlim, sizeof (struct rlimit))))
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return (error);
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return dosetrlimit(td, which, &rlim);
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}
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int
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linux_getrlimit(td, uap)
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struct thread *td;
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struct linux_getrlimit_args *uap;
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{
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u_int which;
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#ifdef DEBUG
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if (ldebug(getrlimit))
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printf(ARGS(getrlimit, "%d, %p"),
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uap->resource, (void *)uap->rlim);
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#endif
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if (uap->resource >= LINUX_RLIM_NLIMITS)
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return EINVAL;
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which = linux_to_bsd_resource[uap->resource];
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if (which == -1)
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return EINVAL;
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return (copyout((caddr_t)&td->td_proc->p_rlimit[which],
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(caddr_t)uap->rlim, sizeof (struct rlimit)));
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}
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