8e3c3eafed
Merge the contents (less some trivial bordering the silly comments) of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>. This puts the #defines for the vm_inherit_t and vm_prot_t types next to their typedefs. This paves the road for the commit to follow shortly: change useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE} as argument.
1454 lines
34 KiB
C
1454 lines
34 KiB
C
/*-
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* Copyright (c) 1994-1995 Søren Schmidt
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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 withough 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 "opt_compat.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/kernel.h>
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#include <sys/mman.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/imgact_aout.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/resourcevar.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/wait.h>
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#include <sys/time.h>
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#include <sys/signalvar.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_map.h>
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#include <vm/vm_extern.h>
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#include <machine/frame.h>
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#include <machine/psl.h>
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#include <machine/sysarch.h>
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#include <machine/segments.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 <i386/linux/linux_util.h>
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#include <i386/linux/linux_mib.h>
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#include <posix4/sched.h>
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#define BSD_TO_LINUX_SIGNAL(sig) \
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(((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
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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_NPROC, RLIMIT_NOFILE,
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RLIMIT_MEMLOCK, -1
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};
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int
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linux_alarm(struct proc *p, struct linux_alarm_args *args)
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{
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struct itimerval it, old_it;
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struct timeval tv;
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int s;
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#ifdef DEBUG
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printf("Linux-emul(%ld): alarm(%u)\n", (long)p->p_pid, args->secs);
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#endif
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if (args->secs > 100000000)
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return EINVAL;
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it.it_value.tv_sec = (long)args->secs;
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it.it_value.tv_usec = 0;
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it.it_interval.tv_sec = 0;
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it.it_interval.tv_usec = 0;
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s = splsoftclock();
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old_it = p->p_realtimer;
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getmicrouptime(&tv);
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if (timevalisset(&old_it.it_value))
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untimeout(realitexpire, (caddr_t)p, p->p_ithandle);
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if (it.it_value.tv_sec != 0) {
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p->p_ithandle = timeout(realitexpire, (caddr_t)p, tvtohz(&it.it_value));
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timevaladd(&it.it_value, &tv);
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}
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p->p_realtimer = it;
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splx(s);
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if (timevalcmp(&old_it.it_value, &tv, >)) {
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timevalsub(&old_it.it_value, &tv);
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if (old_it.it_value.tv_usec != 0)
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old_it.it_value.tv_sec++;
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p->p_retval[0] = old_it.it_value.tv_sec;
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}
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return 0;
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}
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int
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linux_brk(struct proc *p, struct linux_brk_args *args)
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{
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#if 0
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struct vmspace *vm = p->p_vmspace;
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vm_offset_t new, old;
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int error;
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if ((vm_offset_t)args->dsend < (vm_offset_t)vm->vm_daddr)
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return EINVAL;
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if (((caddr_t)args->dsend - (caddr_t)vm->vm_daddr)
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> p->p_rlimit[RLIMIT_DATA].rlim_cur)
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return ENOMEM;
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old = round_page((vm_offset_t)vm->vm_daddr) + ctob(vm->vm_dsize);
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new = round_page((vm_offset_t)args->dsend);
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p->p_retval[0] = old;
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if ((new-old) > 0) {
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if (swap_pager_full)
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return ENOMEM;
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error = vm_map_find(&vm->vm_map, NULL, 0, &old, (new-old), FALSE,
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VM_PROT_ALL, VM_PROT_ALL, 0);
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if (error)
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return error;
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vm->vm_dsize += btoc((new-old));
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p->p_retval[0] = (int)(vm->vm_daddr + ctob(vm->vm_dsize));
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}
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return 0;
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#else
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struct vmspace *vm = p->p_vmspace;
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vm_offset_t new, old;
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struct obreak_args /* {
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char * nsize;
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} */ tmp;
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#ifdef DEBUG
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printf("Linux-emul(%ld): brk(%p)\n", (long)p->p_pid, (void *)args->dsend);
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#endif
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old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
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new = (vm_offset_t)args->dsend;
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tmp.nsize = (char *) new;
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if (((caddr_t)new > vm->vm_daddr) && !obreak(p, &tmp))
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p->p_retval[0] = (int)new;
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else
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p->p_retval[0] = (int)old;
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return 0;
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#endif
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}
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int
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linux_uselib(struct proc *p, struct linux_uselib_args *args)
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{
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struct nameidata ni;
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struct vnode *vp;
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struct exec *a_out;
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struct vattr attr;
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vm_offset_t vmaddr;
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unsigned long file_offset;
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vm_offset_t buffer;
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unsigned long bss_size;
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int error;
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caddr_t sg;
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int locked;
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sg = stackgap_init();
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CHECKALTEXIST(p, &sg, args->library);
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#ifdef DEBUG
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printf("Linux-emul(%ld): uselib(%s)\n", (long)p->p_pid, args->library);
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#endif
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a_out = NULL;
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locked = 0;
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vp = NULL;
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NDINIT(&ni, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, args->library, p);
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error = namei(&ni);
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if (error)
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goto cleanup;
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vp = ni.ni_vp;
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if (vp == NULL) {
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error = ENOEXEC; /* ?? */
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goto cleanup;
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}
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/*
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* From here on down, we have a locked vnode that must be unlocked.
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*/
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locked++;
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/*
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* Writable?
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*/
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if (vp->v_writecount) {
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error = ETXTBSY;
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goto cleanup;
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}
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/*
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* Executable?
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*/
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error = VOP_GETATTR(vp, &attr, p->p_ucred, p);
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if (error)
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goto cleanup;
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if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
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((attr.va_mode & 0111) == 0) ||
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(attr.va_type != VREG)) {
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error = ENOEXEC;
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goto cleanup;
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}
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/*
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* Sensible size?
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*/
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if (attr.va_size == 0) {
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error = ENOEXEC;
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goto cleanup;
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}
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/*
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* Can we access it?
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*/
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error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
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if (error)
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goto cleanup;
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error = VOP_OPEN(vp, FREAD, p->p_ucred, p);
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if (error)
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goto cleanup;
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/*
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* Lock no longer needed
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*/
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VOP_UNLOCK(vp, 0, p);
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locked = 0;
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/*
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* Pull in executable header into kernel_map
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*/
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error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
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VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0);
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if (error)
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goto cleanup;
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/*
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* Is it a Linux binary ?
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*/
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if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
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error = ENOEXEC;
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goto cleanup;
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}
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/* While we are here, we should REALLY do some more checks */
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/*
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* Set file/virtual offset based on a.out variant.
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*/
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switch ((int)(a_out->a_magic & 0xffff)) {
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case 0413: /* ZMAGIC */
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file_offset = 1024;
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break;
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case 0314: /* QMAGIC */
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file_offset = 0;
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break;
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default:
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error = ENOEXEC;
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goto cleanup;
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}
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bss_size = round_page(a_out->a_bss);
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/*
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* Check various fields in header for validity/bounds.
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*/
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if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
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error = ENOEXEC;
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goto cleanup;
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}
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/* text + data can't exceed file size */
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if (a_out->a_data + a_out->a_text > attr.va_size) {
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error = EFAULT;
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goto cleanup;
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}
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/*
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* text/data/bss must not exceed limits
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* XXX: this is not complete. it should check current usage PLUS
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* the resources needed by this library.
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*/
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if (a_out->a_text > MAXTSIZ ||
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a_out->a_data + bss_size > p->p_rlimit[RLIMIT_DATA].rlim_cur) {
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error = ENOMEM;
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goto cleanup;
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}
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|
|
|
/*
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* prevent more writers
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|
*/
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vp->v_flag |= VTEXT;
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|
|
|
/*
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* Check if file_offset page aligned,.
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* Currently we cannot handle misalinged file offsets,
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* and so we read in the entire image (what a waste).
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*/
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|
if (file_offset & PAGE_MASK) {
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#ifdef DEBUG
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printf("uselib: Non page aligned binary %lu\n", file_offset);
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#endif
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/*
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|
* Map text+data read/write/execute
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|
*/
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/* a_entry is the load address and is page aligned */
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vmaddr = trunc_page(a_out->a_entry);
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|
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/* get anon user mapping, read+write+execute */
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error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
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a_out->a_text + a_out->a_data, FALSE,
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VM_PROT_ALL, VM_PROT_ALL, 0);
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if (error)
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goto cleanup;
|
|
|
|
/* map file into kernel_map */
|
|
error = vm_mmap(kernel_map, &buffer,
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round_page(a_out->a_text + a_out->a_data + file_offset),
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VM_PROT_READ, VM_PROT_READ, 0,
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(caddr_t)vp, trunc_page(file_offset));
|
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if (error)
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goto cleanup;
|
|
|
|
/* copy from kernel VM space to user space */
|
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error = copyout((caddr_t)(void *)(uintptr_t)(buffer + file_offset),
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(caddr_t)vmaddr, a_out->a_text + a_out->a_data);
|
|
|
|
/* release temporary kernel space */
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vm_map_remove(kernel_map, buffer,
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buffer + round_page(a_out->a_text + a_out->a_data + file_offset));
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|
|
|
if (error)
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goto cleanup;
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|
}
|
|
else {
|
|
#ifdef DEBUG
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|
printf("uselib: Page aligned binary %lu\n", file_offset);
|
|
#endif
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|
/*
|
|
* for QMAGIC, a_entry is 20 bytes beyond the load address
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|
* to skip the executable header
|
|
*/
|
|
vmaddr = trunc_page(a_out->a_entry);
|
|
|
|
/*
|
|
* Map it all into the process's space as a single copy-on-write
|
|
* "data" segment.
|
|
*/
|
|
error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
|
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a_out->a_text + a_out->a_data,
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VM_PROT_ALL, VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
|
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(caddr_t)vp, file_offset);
|
|
if (error)
|
|
goto cleanup;
|
|
}
|
|
#ifdef DEBUG
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|
printf("mem=%08x = %08x %08x\n", vmaddr, ((int*)vmaddr)[0], ((int*)vmaddr)[1]);
|
|
#endif
|
|
if (bss_size != 0) {
|
|
/*
|
|
* Calculate BSS start address
|
|
*/
|
|
vmaddr = trunc_page(a_out->a_entry) + a_out->a_text + a_out->a_data;
|
|
|
|
/*
|
|
* allocate some 'anon' space
|
|
*/
|
|
error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
|
|
bss_size, FALSE,
|
|
VM_PROT_ALL, VM_PROT_ALL, 0);
|
|
if (error)
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
/*
|
|
* Unlock vnode if needed
|
|
*/
|
|
if (locked)
|
|
VOP_UNLOCK(vp, 0, p);
|
|
|
|
/*
|
|
* Release the kernel mapping.
|
|
*/
|
|
if (a_out)
|
|
vm_map_remove(kernel_map, (vm_offset_t)a_out, (vm_offset_t)a_out + PAGE_SIZE);
|
|
|
|
return error;
|
|
}
|
|
|
|
/* XXX move */
|
|
struct linux_select_argv {
|
|
int nfds;
|
|
fd_set *readfds;
|
|
fd_set *writefds;
|
|
fd_set *exceptfds;
|
|
struct timeval *timeout;
|
|
};
|
|
|
|
int
|
|
linux_select(struct proc *p, struct linux_select_args *args)
|
|
{
|
|
struct linux_select_argv linux_args;
|
|
struct linux_newselect_args newsel;
|
|
int error;
|
|
|
|
#ifdef SELECT_DEBUG
|
|
printf("Linux-emul(%ld): select(%x)\n", (long)p->p_pid, args->ptr);
|
|
#endif
|
|
if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
|
|
sizeof(linux_args))))
|
|
return error;
|
|
|
|
newsel.nfds = linux_args.nfds;
|
|
newsel.readfds = linux_args.readfds;
|
|
newsel.writefds = linux_args.writefds;
|
|
newsel.exceptfds = linux_args.exceptfds;
|
|
newsel.timeout = linux_args.timeout;
|
|
|
|
return linux_newselect(p, &newsel);
|
|
}
|
|
|
|
int
|
|
linux_newselect(struct proc *p, struct linux_newselect_args *args)
|
|
{
|
|
struct select_args bsa;
|
|
struct timeval tv0, tv1, utv, *tvp;
|
|
caddr_t sg;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): newselect(%d, %p, %p, %p, %p)\n",
|
|
(long)p->p_pid, args->nfds, (void *)args->readfds,
|
|
(void *)args->writefds, (void *)args->exceptfds,
|
|
(void *)args->timeout);
|
|
#endif
|
|
error = 0;
|
|
bsa.nd = args->nfds;
|
|
bsa.in = args->readfds;
|
|
bsa.ou = args->writefds;
|
|
bsa.ex = args->exceptfds;
|
|
bsa.tv = args->timeout;
|
|
|
|
/*
|
|
* Store current time for computation of the amount of
|
|
* time left.
|
|
*/
|
|
if (args->timeout) {
|
|
if ((error = copyin(args->timeout, &utv, sizeof(utv))))
|
|
goto select_out;
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): incoming timeout (%ld/%ld)\n",
|
|
(long)p->p_pid, utv.tv_sec, utv.tv_usec);
|
|
#endif
|
|
if (itimerfix(&utv)) {
|
|
/*
|
|
* The timeval was invalid. Convert it to something
|
|
* valid that will act as it does under Linux.
|
|
*/
|
|
sg = stackgap_init();
|
|
tvp = stackgap_alloc(&sg, sizeof(utv));
|
|
utv.tv_sec += utv.tv_usec / 1000000;
|
|
utv.tv_usec %= 1000000;
|
|
if (utv.tv_usec < 0) {
|
|
utv.tv_sec -= 1;
|
|
utv.tv_usec += 1000000;
|
|
}
|
|
if (utv.tv_sec < 0)
|
|
timevalclear(&utv);
|
|
if ((error = copyout(&utv, tvp, sizeof(utv))))
|
|
goto select_out;
|
|
bsa.tv = tvp;
|
|
}
|
|
microtime(&tv0);
|
|
}
|
|
|
|
error = select(p, &bsa);
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): real select returns %d\n", (long)p->p_pid, error);
|
|
#endif
|
|
|
|
if (error) {
|
|
/*
|
|
* See fs/select.c in the Linux kernel. Without this,
|
|
* Maelstrom doesn't work.
|
|
*/
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
goto select_out;
|
|
}
|
|
|
|
if (args->timeout) {
|
|
if (p->p_retval[0]) {
|
|
/*
|
|
* Compute how much time was left of the timeout,
|
|
* by subtracting the current time and the time
|
|
* before we started the call, and subtracting
|
|
* that result from the user-supplied value.
|
|
*/
|
|
microtime(&tv1);
|
|
timevalsub(&tv1, &tv0);
|
|
timevalsub(&utv, &tv1);
|
|
if (utv.tv_sec < 0)
|
|
timevalclear(&utv);
|
|
} else
|
|
timevalclear(&utv);
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): outgoing timeout (%ld/%ld)\n",
|
|
(long)p->p_pid, utv.tv_sec, utv.tv_usec);
|
|
#endif
|
|
if ((error = copyout(&utv, args->timeout, sizeof(utv))))
|
|
goto select_out;
|
|
}
|
|
|
|
select_out:
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): newselect_out -> %d\n", (long)p->p_pid, error);
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
int
|
|
linux_getpgid(struct proc *p, struct linux_getpgid_args *args)
|
|
{
|
|
struct proc *curp;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): getpgid(%d)\n", (long)p->p_pid, args->pid);
|
|
#endif
|
|
if (args->pid != p->p_pid) {
|
|
if (!(curp = pfind(args->pid)))
|
|
return ESRCH;
|
|
}
|
|
else
|
|
curp = p;
|
|
p->p_retval[0] = curp->p_pgid;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_fork(struct proc *p, struct linux_fork_args *args)
|
|
{
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): fork()\n", (long)p->p_pid);
|
|
#endif
|
|
if ((error = fork(p, (struct fork_args *)args)) != 0)
|
|
return error;
|
|
if (p->p_retval[1] == 1)
|
|
p->p_retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_vfork(struct proc *p, struct linux_vfork_args *args)
|
|
{
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): vfork()\n", (long)p->p_pid);
|
|
#endif
|
|
|
|
if ((error = vfork(p, (struct vfork_args *)args)) != 0)
|
|
return error;
|
|
/* Are we the child? */
|
|
if (p->p_retval[1] == 1)
|
|
p->p_retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
#define CLONE_VM 0x100
|
|
#define CLONE_FS 0x200
|
|
#define CLONE_FILES 0x400
|
|
#define CLONE_SIGHAND 0x800
|
|
#define CLONE_PID 0x1000
|
|
|
|
int
|
|
linux_clone(struct proc *p, struct linux_clone_args *args)
|
|
{
|
|
int error, ff = RFPROC;
|
|
struct proc *p2;
|
|
int exit_signal;
|
|
vm_offset_t start;
|
|
struct rfork_args rf_args;
|
|
|
|
#ifdef DEBUG
|
|
if (args->flags & CLONE_PID)
|
|
printf("linux_clone(%ld): CLONE_PID not yet supported\n",
|
|
(long)p->p_pid);
|
|
printf("linux_clone(%ld): invoked with flags %x and stack %x\n",
|
|
(long)p->p_pid, (unsigned int)args->flags,
|
|
(unsigned int)args->stack);
|
|
#endif
|
|
|
|
if (!args->stack)
|
|
return (EINVAL);
|
|
|
|
exit_signal = args->flags & 0x000000ff;
|
|
if (exit_signal >= LINUX_NSIG)
|
|
return EINVAL;
|
|
|
|
if (exit_signal <= LINUX_SIGTBLSZ)
|
|
exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
|
|
|
|
/* RFTHREAD probably not necessary here, but it shouldn't hurt either */
|
|
ff |= RFTHREAD;
|
|
|
|
if (args->flags & CLONE_VM)
|
|
ff |= RFMEM;
|
|
if (args->flags & CLONE_SIGHAND)
|
|
ff |= RFSIGSHARE;
|
|
if (!(args->flags & CLONE_FILES))
|
|
ff |= RFFDG;
|
|
|
|
error = 0;
|
|
start = 0;
|
|
|
|
rf_args.flags = ff;
|
|
if ((error = rfork(p, &rf_args)) != 0)
|
|
return error;
|
|
|
|
p2 = pfind(p->p_retval[0]);
|
|
if (p2 == 0)
|
|
return ESRCH;
|
|
|
|
p2->p_sigparent = exit_signal;
|
|
p2->p_md.md_regs->tf_esp = (unsigned int)args->stack;
|
|
|
|
#ifdef DEBUG
|
|
printf ("linux_clone(%ld): successful rfork to %ld\n",
|
|
(long)p->p_pid, (long)p2->p_pid);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/* XXX move */
|
|
struct linux_mmap_argv {
|
|
linux_caddr_t addr;
|
|
int len;
|
|
int prot;
|
|
int flags;
|
|
int fd;
|
|
int pos;
|
|
};
|
|
|
|
#define STACK_SIZE (2 * 1024 * 1024)
|
|
#define GUARD_SIZE (4 * PAGE_SIZE)
|
|
int
|
|
linux_mmap(struct proc *p, struct linux_mmap_args *args)
|
|
{
|
|
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 linux_mmap_argv linux_args;
|
|
|
|
if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
|
|
sizeof(linux_args))))
|
|
return error;
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): mmap(%p, %d, %d, %08x, %d, %d)\n",
|
|
(long)p->p_pid, (void *)linux_args.addr, linux_args.len,
|
|
linux_args.prot, linux_args.flags, linux_args.fd, linux_args.pos);
|
|
#endif
|
|
bsd_args.flags = 0;
|
|
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;
|
|
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;
|
|
|
|
/* 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 | PROT_READ; /* always required */
|
|
bsd_args.fd = linux_args.fd;
|
|
bsd_args.pos = linux_args.pos;
|
|
bsd_args.pad = 0;
|
|
return mmap(p, &bsd_args);
|
|
}
|
|
|
|
int
|
|
linux_mremap(struct proc *p, struct linux_mremap_args *args)
|
|
{
|
|
struct munmap_args /* {
|
|
void *addr;
|
|
size_t len;
|
|
} */ bsd_args;
|
|
int error = 0;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): mremap(%p, %08x, %08x, %08x)\n",
|
|
(long)p->p_pid, (void *)args->addr, args->old_len, args->new_len,
|
|
args->flags);
|
|
#endif
|
|
args->new_len = round_page(args->new_len);
|
|
args->old_len = round_page(args->old_len);
|
|
|
|
if (args->new_len > args->old_len) {
|
|
p->p_retval[0] = 0;
|
|
return ENOMEM;
|
|
}
|
|
|
|
if (args->new_len < args->old_len) {
|
|
bsd_args.addr = args->addr + args->new_len;
|
|
bsd_args.len = args->old_len - args->new_len;
|
|
error = munmap(p, &bsd_args);
|
|
}
|
|
|
|
p->p_retval[0] = error ? 0 : (int)args->addr;
|
|
return error;
|
|
}
|
|
|
|
int
|
|
linux_msync(struct proc *p, struct linux_msync_args *args)
|
|
{
|
|
struct msync_args bsd_args;
|
|
|
|
bsd_args.addr = args->addr;
|
|
bsd_args.len = args->len;
|
|
bsd_args.flags = 0; /* XXX ignore */
|
|
|
|
return msync(p, &bsd_args);
|
|
}
|
|
|
|
int
|
|
linux_pipe(struct proc *p, struct linux_pipe_args *args)
|
|
{
|
|
int error;
|
|
int reg_edx;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): pipe(*)\n", (long)p->p_pid);
|
|
#endif
|
|
reg_edx = p->p_retval[1];
|
|
error = pipe(p, 0);
|
|
if (error) {
|
|
p->p_retval[1] = reg_edx;
|
|
return error;
|
|
}
|
|
|
|
error = copyout(p->p_retval, args->pipefds, 2*sizeof(int));
|
|
if (error) {
|
|
p->p_retval[1] = reg_edx;
|
|
return error;
|
|
}
|
|
|
|
p->p_retval[1] = reg_edx;
|
|
p->p_retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_time(struct proc *p, struct linux_time_args *args)
|
|
{
|
|
struct timeval tv;
|
|
linux_time_t tm;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): time(*)\n", (long)p->p_pid);
|
|
#endif
|
|
microtime(&tv);
|
|
tm = tv.tv_sec;
|
|
if (args->tm && (error = copyout(&tm, args->tm, sizeof(linux_time_t))))
|
|
return error;
|
|
p->p_retval[0] = tm;
|
|
return 0;
|
|
}
|
|
|
|
struct linux_times_argv {
|
|
long tms_utime;
|
|
long tms_stime;
|
|
long tms_cutime;
|
|
long tms_cstime;
|
|
};
|
|
|
|
#define CLK_TCK 100 /* Linux uses 100 */
|
|
#define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
|
|
|
|
int
|
|
linux_times(struct proc *p, struct linux_times_args *args)
|
|
{
|
|
struct timeval tv;
|
|
struct linux_times_argv tms;
|
|
struct rusage ru;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): times(*)\n", (long)p->p_pid);
|
|
#endif
|
|
calcru(p, &ru.ru_utime, &ru.ru_stime, NULL);
|
|
|
|
tms.tms_utime = CONVTCK(ru.ru_utime);
|
|
tms.tms_stime = CONVTCK(ru.ru_stime);
|
|
|
|
tms.tms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime);
|
|
tms.tms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime);
|
|
|
|
if ((error = copyout((caddr_t)&tms, (caddr_t)args->buf,
|
|
sizeof(struct linux_times_argv))))
|
|
return error;
|
|
|
|
microuptime(&tv);
|
|
p->p_retval[0] = (int)CONVTCK(tv);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_newuname(struct proc *p, struct linux_newuname_args *args)
|
|
{
|
|
struct linux_new_utsname utsname;
|
|
char *osrelease, *osname;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): newuname(*)\n", (long)p->p_pid);
|
|
#endif
|
|
|
|
osname = linux_get_osname(p);
|
|
osrelease = linux_get_osrelease(p);
|
|
|
|
bzero(&utsname, sizeof(struct linux_new_utsname));
|
|
strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1);
|
|
strncpy(utsname.nodename, hostname, LINUX_MAX_UTSNAME-1);
|
|
strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1);
|
|
strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1);
|
|
strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1);
|
|
strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1);
|
|
|
|
return (copyout((caddr_t)&utsname, (caddr_t)args->buf,
|
|
sizeof(struct linux_new_utsname)));
|
|
}
|
|
|
|
struct linux_utimbuf {
|
|
linux_time_t l_actime;
|
|
linux_time_t l_modtime;
|
|
};
|
|
|
|
int
|
|
linux_utime(struct proc *p, struct linux_utime_args *args)
|
|
{
|
|
struct utimes_args /* {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
} */ bsdutimes;
|
|
struct timeval tv[2], *tvp;
|
|
struct linux_utimbuf lut;
|
|
int error;
|
|
caddr_t sg;
|
|
|
|
sg = stackgap_init();
|
|
CHECKALTEXIST(p, &sg, args->fname);
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): utime(%s, *)\n", (long)p->p_pid, args->fname);
|
|
#endif
|
|
if (args->times) {
|
|
if ((error = copyin(args->times, &lut, sizeof lut)))
|
|
return error;
|
|
tv[0].tv_sec = lut.l_actime;
|
|
tv[0].tv_usec = 0;
|
|
tv[1].tv_sec = lut.l_modtime;
|
|
tv[1].tv_usec = 0;
|
|
/* so that utimes can copyin */
|
|
tvp = (struct timeval *)stackgap_alloc(&sg, sizeof(tv));
|
|
if ((error = copyout(tv, tvp, sizeof(tv))))
|
|
return error;
|
|
bsdutimes.tptr = tvp;
|
|
} else
|
|
bsdutimes.tptr = NULL;
|
|
|
|
bsdutimes.path = args->fname;
|
|
return utimes(p, &bsdutimes);
|
|
}
|
|
|
|
#define __WCLONE 0x80000000
|
|
|
|
int
|
|
linux_waitpid(struct proc *p, struct linux_waitpid_args *args)
|
|
{
|
|
struct wait_args /* {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
struct rusage *rusage;
|
|
} */ tmp;
|
|
int error, tmpstat;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): waitpid(%d, %p, %d)\n",
|
|
(long)p->p_pid, args->pid, (void *)args->status, args->options);
|
|
#endif
|
|
tmp.pid = args->pid;
|
|
tmp.status = args->status;
|
|
tmp.options = (args->options & (WNOHANG | WUNTRACED));
|
|
/* WLINUXCLONE should be equal to __WCLONE, but we make sure */
|
|
if (args->options & __WCLONE)
|
|
tmp.options |= WLINUXCLONE;
|
|
tmp.rusage = NULL;
|
|
|
|
if ((error = wait4(p, &tmp)) != 0)
|
|
return error;
|
|
|
|
if (args->status) {
|
|
if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0)
|
|
return error;
|
|
if (WIFSIGNALED(tmpstat))
|
|
tmpstat = (tmpstat & 0xffffff80) |
|
|
BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
|
|
else if (WIFSTOPPED(tmpstat))
|
|
tmpstat = (tmpstat & 0xffff00ff) |
|
|
(BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
|
|
return copyout(&tmpstat, args->status, sizeof(int));
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_wait4(struct proc *p, struct linux_wait4_args *args)
|
|
{
|
|
struct wait_args /* {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
struct rusage *rusage;
|
|
} */ tmp;
|
|
int error, tmpstat;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): wait4(%d, %p, %d, %p)\n",
|
|
(long)p->p_pid, args->pid, (void *)args->status, args->options,
|
|
(void *)args->rusage);
|
|
#endif
|
|
tmp.pid = args->pid;
|
|
tmp.status = args->status;
|
|
tmp.options = (args->options & (WNOHANG | WUNTRACED));
|
|
/* WLINUXCLONE should be equal to __WCLONE, but we make sure */
|
|
if (args->options & __WCLONE)
|
|
tmp.options |= WLINUXCLONE;
|
|
tmp.rusage = args->rusage;
|
|
|
|
if ((error = wait4(p, &tmp)) != 0)
|
|
return error;
|
|
|
|
SIGDELSET(p->p_siglist, SIGCHLD);
|
|
|
|
if (args->status) {
|
|
if ((error = copyin(args->status, &tmpstat, sizeof(int))) != 0)
|
|
return error;
|
|
if (WIFSIGNALED(tmpstat))
|
|
tmpstat = (tmpstat & 0xffffff80) |
|
|
BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
|
|
else if (WIFSTOPPED(tmpstat))
|
|
tmpstat = (tmpstat & 0xffff00ff) |
|
|
(BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
|
|
return copyout(&tmpstat, args->status, sizeof(int));
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
linux_mknod(struct proc *p, struct linux_mknod_args *args)
|
|
{
|
|
caddr_t sg;
|
|
struct mknod_args bsd_mknod;
|
|
struct mkfifo_args bsd_mkfifo;
|
|
|
|
sg = stackgap_init();
|
|
|
|
CHECKALTCREAT(p, &sg, args->path);
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): mknod(%s, %d, %d)\n",
|
|
(long)p->p_pid, args->path, args->mode, args->dev);
|
|
#endif
|
|
|
|
if (args->mode & S_IFIFO) {
|
|
bsd_mkfifo.path = args->path;
|
|
bsd_mkfifo.mode = args->mode;
|
|
return mkfifo(p, &bsd_mkfifo);
|
|
} else {
|
|
bsd_mknod.path = args->path;
|
|
bsd_mknod.mode = args->mode;
|
|
bsd_mknod.dev = args->dev;
|
|
return mknod(p, &bsd_mknod);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* UGH! This is just about the dumbest idea I've ever heard!!
|
|
*/
|
|
int
|
|
linux_personality(struct proc *p, struct linux_personality_args *args)
|
|
{
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): personality(%d)\n",
|
|
(long)p->p_pid, args->per);
|
|
#endif
|
|
if (args->per != 0)
|
|
return EINVAL;
|
|
|
|
/* Yes Jim, it's still a Linux... */
|
|
p->p_retval[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Wrappers for get/setitimer for debugging..
|
|
*/
|
|
int
|
|
linux_setitimer(struct proc *p, struct linux_setitimer_args *args)
|
|
{
|
|
struct setitimer_args bsa;
|
|
struct itimerval foo;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): setitimer(%p, %p)\n",
|
|
(long)p->p_pid, (void *)args->itv, (void *)args->oitv);
|
|
#endif
|
|
bsa.which = args->which;
|
|
bsa.itv = args->itv;
|
|
bsa.oitv = args->oitv;
|
|
if (args->itv) {
|
|
if ((error = copyin((caddr_t)args->itv, (caddr_t)&foo,
|
|
sizeof(foo))))
|
|
return error;
|
|
#ifdef DEBUG
|
|
printf("setitimer: value: sec: %ld, usec: %ld\n",
|
|
foo.it_value.tv_sec, foo.it_value.tv_usec);
|
|
printf("setitimer: interval: sec: %ld, usec: %ld\n",
|
|
foo.it_interval.tv_sec, foo.it_interval.tv_usec);
|
|
#endif
|
|
}
|
|
return setitimer(p, &bsa);
|
|
}
|
|
|
|
int
|
|
linux_getitimer(struct proc *p, struct linux_getitimer_args *args)
|
|
{
|
|
struct getitimer_args bsa;
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): getitimer(%p)\n",
|
|
(long)p->p_pid, (void *)args->itv);
|
|
#endif
|
|
bsa.which = args->which;
|
|
bsa.itv = args->itv;
|
|
return getitimer(p, &bsa);
|
|
}
|
|
|
|
int
|
|
linux_ioperm(struct proc *p, struct linux_ioperm_args *args)
|
|
{
|
|
struct sysarch_args sa;
|
|
struct i386_ioperm_args *iia;
|
|
caddr_t sg;
|
|
|
|
sg = stackgap_init();
|
|
iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args));
|
|
iia->start = args->start;
|
|
iia->length = args->length;
|
|
iia->enable = args->enable;
|
|
sa.op = I386_SET_IOPERM;
|
|
sa.parms = (char *)iia;
|
|
return sysarch(p, &sa);
|
|
}
|
|
|
|
int
|
|
linux_iopl(struct proc *p, struct linux_iopl_args *args)
|
|
{
|
|
int error;
|
|
|
|
if (args->level < 0 || args->level > 3)
|
|
return (EINVAL);
|
|
if ((error = suser(p)) != 0)
|
|
return (error);
|
|
if (securelevel > 0)
|
|
return (EPERM);
|
|
p->p_md.md_regs->tf_eflags = (p->p_md.md_regs->tf_eflags & ~PSL_IOPL) |
|
|
(args->level * (PSL_IOPL / 3));
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_nice(struct proc *p, struct linux_nice_args *args)
|
|
{
|
|
struct setpriority_args bsd_args;
|
|
|
|
bsd_args.which = PRIO_PROCESS;
|
|
bsd_args.who = 0; /* current process */
|
|
bsd_args.prio = args->inc;
|
|
return setpriority(p, &bsd_args);
|
|
}
|
|
|
|
int
|
|
linux_setgroups(p, uap)
|
|
struct proc *p;
|
|
struct linux_setgroups_args *uap;
|
|
{
|
|
struct pcred *pc;
|
|
linux_gid_t linux_gidset[NGROUPS];
|
|
gid_t *bsd_gidset;
|
|
int ngrp, error;
|
|
|
|
pc = p->p_cred;
|
|
ngrp = uap->gidsetsize;
|
|
|
|
/*
|
|
* cr_groups[0] holds egid. Setting the whole set from
|
|
* the supplied set will cause egid to be changed too.
|
|
* Keep cr_groups[0] unchanged to prevent that.
|
|
*/
|
|
|
|
if ((error = suser(p)) != 0)
|
|
return (error);
|
|
|
|
if (ngrp >= NGROUPS)
|
|
return (EINVAL);
|
|
|
|
pc->pc_ucred = crcopy(pc->pc_ucred);
|
|
if (ngrp > 0) {
|
|
error = copyin((caddr_t)uap->gidset, (caddr_t)linux_gidset,
|
|
ngrp * sizeof(linux_gid_t));
|
|
if (error)
|
|
return (error);
|
|
|
|
pc->pc_ucred->cr_ngroups = ngrp + 1;
|
|
|
|
bsd_gidset = pc->pc_ucred->cr_groups;
|
|
ngrp--;
|
|
while (ngrp >= 0) {
|
|
bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
|
|
ngrp--;
|
|
}
|
|
}
|
|
else
|
|
pc->pc_ucred->cr_ngroups = 1;
|
|
|
|
setsugid(p);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_getgroups(p, uap)
|
|
struct proc *p;
|
|
struct linux_getgroups_args *uap;
|
|
{
|
|
struct pcred *pc;
|
|
linux_gid_t linux_gidset[NGROUPS];
|
|
gid_t *bsd_gidset;
|
|
int bsd_gidsetsz, ngrp, error;
|
|
|
|
pc = p->p_cred;
|
|
bsd_gidset = pc->pc_ucred->cr_groups;
|
|
bsd_gidsetsz = pc->pc_ucred->cr_ngroups - 1;
|
|
|
|
/*
|
|
* cr_groups[0] holds egid. Returning the whole set
|
|
* here will cause a duplicate. Exclude cr_groups[0]
|
|
* to prevent that.
|
|
*/
|
|
|
|
if ((ngrp = uap->gidsetsize) == 0) {
|
|
p->p_retval[0] = bsd_gidsetsz;
|
|
return (0);
|
|
}
|
|
|
|
if (ngrp < bsd_gidsetsz)
|
|
return (EINVAL);
|
|
|
|
ngrp = 0;
|
|
while (ngrp < bsd_gidsetsz) {
|
|
linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
|
|
ngrp++;
|
|
}
|
|
|
|
if ((error = copyout((caddr_t)linux_gidset, (caddr_t)uap->gidset,
|
|
ngrp * sizeof(linux_gid_t))))
|
|
return (error);
|
|
|
|
p->p_retval[0] = ngrp;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
linux_setrlimit(p, uap)
|
|
struct proc *p;
|
|
struct linux_setrlimit_args *uap;
|
|
{
|
|
struct osetrlimit_args bsd;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): setrlimit(%d, %p)\n",
|
|
(long)p->p_pid, uap->resource, (void *)uap->rlim);
|
|
#endif
|
|
|
|
if (uap->resource >= LINUX_RLIM_NLIMITS)
|
|
return EINVAL;
|
|
|
|
bsd.which = linux_to_bsd_resource[uap->resource];
|
|
|
|
if (bsd.which == -1)
|
|
return EINVAL;
|
|
|
|
bsd.rlp = uap->rlim;
|
|
return osetrlimit(p, &bsd);
|
|
}
|
|
|
|
int
|
|
linux_getrlimit(p, uap)
|
|
struct proc *p;
|
|
struct linux_getrlimit_args *uap;
|
|
{
|
|
struct ogetrlimit_args bsd;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): getrlimit(%d, %p)\n",
|
|
(long)p->p_pid, uap->resource, (void *)uap->rlim);
|
|
#endif
|
|
|
|
if (uap->resource >= LINUX_RLIM_NLIMITS)
|
|
return EINVAL;
|
|
|
|
bsd.which = linux_to_bsd_resource[uap->resource];
|
|
|
|
if (bsd.which == -1)
|
|
return EINVAL;
|
|
|
|
bsd.rlp = uap->rlim;
|
|
return ogetrlimit(p, &bsd);
|
|
}
|
|
|
|
int
|
|
linux_sched_setscheduler(p, uap)
|
|
struct proc *p;
|
|
struct linux_sched_setscheduler_args *uap;
|
|
{
|
|
struct sched_setscheduler_args bsd;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): sched_setscheduler(%d, %d, %p)\n",
|
|
(long)p->p_pid, uap->pid, uap->policy, (const void *)uap->param);
|
|
#endif
|
|
|
|
switch (uap->policy) {
|
|
case LINUX_SCHED_OTHER:
|
|
bsd.policy = SCHED_OTHER;
|
|
break;
|
|
case LINUX_SCHED_FIFO:
|
|
bsd.policy = SCHED_FIFO;
|
|
break;
|
|
case LINUX_SCHED_RR:
|
|
bsd.policy = SCHED_RR;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
|
|
bsd.pid = uap->pid;
|
|
bsd.param = uap->param;
|
|
return sched_setscheduler(p, &bsd);
|
|
}
|
|
|
|
int
|
|
linux_sched_getscheduler(p, uap)
|
|
struct proc *p;
|
|
struct linux_sched_getscheduler_args *uap;
|
|
{
|
|
struct sched_getscheduler_args bsd;
|
|
int error;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%ld): sched_getscheduler(%d)\n",
|
|
(long)p->p_pid, uap->pid);
|
|
#endif
|
|
|
|
bsd.pid = uap->pid;
|
|
error = sched_getscheduler(p, &bsd);
|
|
|
|
switch (p->p_retval[0]) {
|
|
case SCHED_OTHER:
|
|
p->p_retval[0] = LINUX_SCHED_OTHER;
|
|
break;
|
|
case SCHED_FIFO:
|
|
p->p_retval[0] = LINUX_SCHED_FIFO;
|
|
break;
|
|
case SCHED_RR:
|
|
p->p_retval[0] = LINUX_SCHED_RR;
|
|
break;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
struct linux_descriptor {
|
|
unsigned int entry_number;
|
|
unsigned long base_addr;
|
|
unsigned int limit;
|
|
unsigned int seg_32bit:1;
|
|
unsigned int contents:2;
|
|
unsigned int read_exec_only:1;
|
|
unsigned int limit_in_pages:1;
|
|
unsigned int seg_not_present:1;
|
|
unsigned int useable:1;
|
|
};
|
|
|
|
int
|
|
linux_modify_ldt(p, uap)
|
|
struct proc *p;
|
|
struct linux_modify_ldt_args *uap;
|
|
{
|
|
int error;
|
|
caddr_t sg;
|
|
struct sysarch_args args;
|
|
struct i386_ldt_args *ldt;
|
|
struct linux_descriptor ld;
|
|
union descriptor *desc;
|
|
|
|
sg = stackgap_init();
|
|
|
|
if (uap->ptr == NULL)
|
|
return (EINVAL);
|
|
|
|
switch (uap->func) {
|
|
case 0x00: /* read_ldt */
|
|
ldt = stackgap_alloc(&sg, sizeof(*ldt));
|
|
ldt->start = 0;
|
|
ldt->descs = uap->ptr;
|
|
ldt->num = uap->bytecount / sizeof(union descriptor);
|
|
args.op = I386_GET_LDT;
|
|
args.parms = (char*)ldt;
|
|
error = sysarch(p, &args);
|
|
p->p_retval[0] *= sizeof(union descriptor);
|
|
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 = stackgap_alloc(&sg, sizeof(*ldt));
|
|
desc = stackgap_alloc(&sg, sizeof(*desc));
|
|
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;
|
|
args.op = I386_SET_LDT;
|
|
args.parms = (char*)ldt;
|
|
error = sysarch(p, &args);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (error == EOPNOTSUPP) {
|
|
printf("linux: modify_ldt needs kernel option USER_LDT\n");
|
|
error = ENOSYS;
|
|
}
|
|
|
|
return (error);
|
|
}
|