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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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671 lines
16 KiB
C
671 lines
16 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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* $Id: linux_misc.c,v 1.3 1995/11/06 12:52:24 davidg Exp $
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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/sysproto.h>
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#include <sys/kernel.h>
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#include <sys/exec.h>
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#include <sys/mman.h>
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#include <sys/proc.h>
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#include <sys/dirent.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.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/resource.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/times.h>
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#include <sys/utsname.h>
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#include <sys/vnode.h>
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#include <sys/wait.h>
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#include <vm/vm_kern.h>
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#include <machine/cpu.h>
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#include <machine/psl.h>
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#include <i386/linux/linux.h>
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#include <i386/linux/sysproto.h>
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struct linux_alarm_args {
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unsigned int secs;
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};
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int
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linux_alarm(struct proc *p, struct linux_alarm_args *args, int *retval)
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{
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struct itimerval it, old_it;
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int s;
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#ifdef DEBUG
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printf("Linux-emul(%d): alarm(%d)\n", p->p_pid, args->secs);
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#endif
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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 = splclock();
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old_it = p->p_realtimer;
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if (timerisset(&old_it.it_value))
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if (timercmp(&old_it.it_value, &time, <))
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timerclear(&old_it.it_value);
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else
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timevalsub(&old_it.it_value, &time);
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splx(s);
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if (itimerfix(&it.it_value) || itimerfix(&it.it_interval))
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return EINVAL;
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s = splclock();
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untimeout(realitexpire, (caddr_t)p);
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if (timerisset(&it.it_value)) {
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timevaladd(&it.it_value, &time);
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timeout(realitexpire, (caddr_t)p, hzto(&it.it_value));
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}
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p->p_realtimer = it;
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splx(s);
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if (old_it.it_value.tv_usec)
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old_it.it_value.tv_sec++;
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*retval = old_it.it_value.tv_sec;
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return 0;
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}
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struct linux_brk_args {
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linux_caddr_t dsend;
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};
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int
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linux_brk(struct proc *p, struct linux_brk_args *args, int *retval)
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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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*retval = 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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if (error)
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return error;
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vm->vm_dsize += btoc((new-old));
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*retval = (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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vm_offset_t newsize;
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} tmp;
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#ifdef DEBUG
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printf("Linux-emul(%d): brk(%08x)\n", p->p_pid, 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.newsize = new;
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if (((caddr_t)new > vm->vm_daddr) && !obreak(p, &tmp, retval))
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retval[0] = (int)new;
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else
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retval[0] = (int)old;
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return 0;
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#endif
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}
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struct linux_uselib_args {
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char *library;
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};
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int
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linux_uselib(struct proc *p, struct linux_uselib_args *args, int *retval)
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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 = 0;
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struct vattr attr;
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unsigned long vmaddr, virtual_offset, file_offset;
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unsigned long buffer, bss_size;
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char *ptr;
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char path[MAXPATHLEN];
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const char *prefix = "/compat/linux";
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size_t sz, len;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, args->library);
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#endif
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for (ptr = path; (*ptr = *prefix) != '\0'; ptr++, prefix++) ;
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sz = MAXPATHLEN - (ptr - path);
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if (error = copyinstr(args->library, ptr, sz, &len))
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return error;
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if (*ptr != '/')
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return EINVAL;
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#ifdef DEBUG
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printf("Linux-emul(%d): uselib(%s)\n", p->p_pid, path);
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#endif
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NDINIT(&ni, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p);
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if (error = namei(&ni))
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return error;
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vp = ni.ni_vp;
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if (vp == NULL)
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return ENOEXEC;
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if (vp->v_writecount) {
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VOP_UNLOCK(vp);
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return ETXTBSY;
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}
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if (error = VOP_GETATTR(vp, &attr, p->p_ucred, p)) {
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VOP_UNLOCK(vp);
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return error;
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}
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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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VOP_UNLOCK(vp);
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return ENOEXEC;
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}
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if (attr.va_size == 0) {
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VOP_UNLOCK(vp);
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return ENOEXEC;
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}
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if (error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p)) {
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VOP_UNLOCK(vp);
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return error;
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}
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if (error = VOP_OPEN(vp, FREAD, p->p_ucred, p)) {
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VOP_UNLOCK(vp);
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return error;
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}
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VOP_UNLOCK(vp); /* lock no longer needed */
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error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, 1024,
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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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return (error);
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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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return ENOEXEC;
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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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virtual_offset = 0;
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file_offset = 1024;
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break;
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case 0314: /* QMAGIC */
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virtual_offset = 4096;
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file_offset = 0;
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break;
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default:
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return ENOEXEC;
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}
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vp->v_flag |= VTEXT;
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bss_size = round_page(a_out->a_bss);
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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 & PGOFSET) {
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#ifdef DEBUG
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printf("uselib: Non page aligned binary %d\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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vmaddr = virtual_offset + round_page(a_out->a_entry);
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error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
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round_page(a_out->a_text + a_out->a_data), FALSE);
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if (error)
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return error;
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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, MAP_FILE,
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(caddr_t)vp, trunc_page(file_offset));
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if (error)
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return error;
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error = copyout((caddr_t)(buffer + file_offset), (caddr_t)vmaddr,
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a_out->a_text + a_out->a_data);
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if (error)
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return error;
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vm_map_remove(kernel_map, trunc_page(vmaddr),
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round_page(a_out->a_text + a_out->a_data + file_offset));
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error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr,
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round_page(a_out->a_text + a_out->a_data),
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VM_PROT_ALL, TRUE);
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if (error)
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return error;
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}
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else {
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#ifdef DEBUG
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printf("uselib: Page aligned binary %d\n", file_offset);
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#endif
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vmaddr = virtual_offset + round_page(a_out->a_entry);
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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);
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if (error)
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return (error);
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}
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#ifdef DEBUG
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printf("mem=%08x = %08x %08x\n", vmaddr, ((int*)vmaddr)[0], ((int*)vmaddr)[1]);
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#endif
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if (bss_size != 0) {
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vmaddr = virtual_offset + round_page(a_out->a_entry) +
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round_page(a_out->a_text + a_out->a_data);
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error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &vmaddr,
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bss_size, FALSE);
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if (error)
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return error;
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error = vm_map_protect(&p->p_vmspace->vm_map, vmaddr, bss_size,
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VM_PROT_ALL, TRUE);
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if (error)
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return error;
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}
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return 0;
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}
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struct linux_select_args {
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void *ptr;
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};
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int
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linux_select(struct proc *p, struct linux_select_args *args, int *retval)
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{
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struct {
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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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} linux_args;
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struct {
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unsigned int nd;
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fd_set *in;
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fd_set *ou;
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fd_set *ex;
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struct timeval *tv;
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} bsd_args;
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int error;
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if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
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sizeof(linux_args))))
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return error;
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#ifdef DEBUG
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printf("Linux-emul(%d): select(%d, %d, %d, %d, %d)\n",
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p->p_pid, linux_args.nfds, linux_args.readfds,
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linux_args.writefds, linux_args.exceptfds,
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linux_args.timeout);
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#endif
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bsd_args.nd = linux_args.nfds;
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bsd_args.in = linux_args.readfds;
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bsd_args.ou = linux_args.writefds;
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bsd_args.ex = linux_args.exceptfds;
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bsd_args.tv = linux_args.timeout;
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return select(p, &bsd_args, retval);
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}
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struct linux_getpgid_args {
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int pid;
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};
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int
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linux_getpgid(struct proc *p, struct linux_getpgid_args *args, int *retval)
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{
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struct proc *curproc;
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#ifdef DEBUG
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printf("Linux-emul(%d): getpgid(%d)\n", p->p_pid, args->pid);
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#endif
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if (args->pid != p->p_pid) {
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if (!(curproc = pfind(args->pid)))
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return ESRCH;
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}
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else
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curproc = p;
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*retval = curproc->p_pgid;
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return 0;
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}
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int
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linux_fork(struct proc *p, void *args, int *retval)
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{
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): fork()\n", p->p_pid);
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#endif
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if (error = fork(p, args, retval))
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return error;
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if (retval[1] == 1)
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retval[0] = 0;
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return 0;
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}
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struct linux_mmap_args {
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void *ptr;
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};
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int
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linux_mmap(struct proc *p, struct linux_mmap_args *args, int *retval)
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{
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struct {
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linux_caddr_t addr;
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int len;
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int prot;
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int flags;
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int fd;
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int pos;
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} linux_args;
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struct {
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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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if ((error = copyin((caddr_t)args->ptr, (caddr_t)&linux_args,
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sizeof(linux_args))))
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return error;
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#ifdef DEBUG
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printf("Linux-emul(%d): mmap(%08x, %d, %d, %08x, %d, %d)\n",
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p->p_pid, linux_args.addr, linux_args.len, linux_args.prot,
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linux_args.flags, linux_args.fd, linux_args.pos);
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#endif
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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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if (linux_args.flags & LINUX_MAP_ANON)
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bsd_args.flags |= MAP_ANON;
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bsd_args.addr = linux_args.addr;
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bsd_args.len = linux_args.len;
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bsd_args.prot = linux_args.prot;
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bsd_args.fd = linux_args.fd;
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bsd_args.pos = linux_args.pos;
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bsd_args.pad = 0;
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return mmap(p, &bsd_args, retval);
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}
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struct linux_pipe_args {
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int *pipefds;
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};
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int
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linux_pipe(struct proc *p, struct linux_pipe_args *args, int *retval)
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{
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): pipe(*)\n", p->p_pid);
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#endif
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if (error = pipe(p, 0, retval))
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return error;
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if (error = copyout(retval, args->pipefds, 2*sizeof(int)))
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return error;
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*retval = 0;
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return 0;
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}
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struct linux_time_args {
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linux_time_t *tm;
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};
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int
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linux_time(struct proc *p, struct linux_time_args *args, int *retval)
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{
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struct timeval tv;
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linux_time_t tm;
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int error;
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#ifdef DEBUG
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printf("Linux-emul(%d): time(*)\n", p->p_pid);
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#endif
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microtime(&tv);
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tm = tv.tv_sec;
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if (error = copyout(&tm, args->tm, sizeof(linux_time_t)))
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return error;
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*retval = tv.tv_sec;
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return 0;
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}
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struct linux_tms {
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long tms_utime;
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long tms_stime;
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long tms_cutime;
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long tms_cstime;
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};
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struct linux_tms_args {
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char *buf;
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};
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int
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|
linux_times(struct proc *p, struct linux_tms_args *args, int *retval)
|
|
{
|
|
struct timeval tv;
|
|
struct linux_tms tms;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%d): times(*)\n", p->p_pid);
|
|
#endif
|
|
tms.tms_utime = p->p_uticks;
|
|
tms.tms_stime = p->p_sticks;
|
|
tms.tms_cutime = p->p_stats->p_cru.ru_utime.tv_sec * hz +
|
|
((p->p_stats->p_cru.ru_utime.tv_usec * hz)/1000000);
|
|
tms.tms_cstime = p->p_stats->p_cru.ru_stime.tv_sec * hz +
|
|
((p->p_stats->p_cru.ru_stime.tv_usec * hz)/1000000);
|
|
microtime(&tv);
|
|
*retval = tv.tv_sec * hz + (tv.tv_usec * hz)/1000000;
|
|
return (copyout((caddr_t)&tms, (caddr_t)args->buf,
|
|
sizeof(struct linux_tms)));
|
|
}
|
|
|
|
struct linux_newuname_t {
|
|
char sysname[65];
|
|
char nodename[65];
|
|
char release[65];
|
|
char version[65];
|
|
char machine[65];
|
|
char domainname[65];
|
|
};
|
|
|
|
struct linux_newuname_args {
|
|
char *buf;
|
|
};
|
|
|
|
int
|
|
linux_newuname(struct proc *p, struct linux_newuname_args *args, int *retval)
|
|
{
|
|
struct linux_newuname_t linux_newuname;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%d): newuname(*)\n", p->p_pid);
|
|
#endif
|
|
bzero(&linux_newuname, sizeof(struct linux_newuname_args));
|
|
strncpy(linux_newuname.sysname, ostype, 64);
|
|
strncpy(linux_newuname.nodename, hostname, 64);
|
|
strncpy(linux_newuname.release, osrelease, 64);
|
|
strncpy(linux_newuname.version, version, 64);
|
|
strncpy(linux_newuname.machine, machine, 64);
|
|
strncpy(linux_newuname.domainname, domainname, 64);
|
|
return (copyout((caddr_t)&linux_newuname, (caddr_t)args->buf,
|
|
sizeof(struct linux_newuname_t)));
|
|
}
|
|
|
|
struct linux_utime_args {
|
|
char *fname;
|
|
linux_time_t *timeptr;
|
|
};
|
|
|
|
int
|
|
linux_utime(struct proc *p, struct linux_utime_args *args, int *retval)
|
|
{
|
|
struct bsd_utimes_args {
|
|
char *fname;
|
|
struct timeval *tptr;
|
|
} bsdutimes;
|
|
struct timeval tv;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%d): utime(%s, *)\n", p->p_pid, args->fname);
|
|
#endif
|
|
tv.tv_sec = (long)args->timeptr;
|
|
tv.tv_usec = 0;
|
|
bsdutimes.tptr = &tv;
|
|
bsdutimes.fname = args->fname;
|
|
return utimes(p, &bsdutimes, retval);
|
|
}
|
|
|
|
struct linux_waitpid_args {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
};
|
|
|
|
int
|
|
linux_waitpid(struct proc *p, struct linux_waitpid_args *args, int *retval)
|
|
{
|
|
struct wait4_args {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
struct rusage *rusage;
|
|
int compat;
|
|
} tmp;
|
|
int error, tmpstat;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%d): waitpid(%d, *, %d)\n",
|
|
p->p_pid, args->pid, args->options);
|
|
#endif
|
|
tmp.pid = args->pid;
|
|
tmp.status = args->status;
|
|
tmp.options = args->options;
|
|
tmp.rusage = NULL;
|
|
tmp.compat = 0;
|
|
|
|
if (error = wait4(p, &tmp, retval))
|
|
return error;
|
|
if (error = copyin(args->status, &tmpstat, sizeof(int)))
|
|
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));
|
|
}
|
|
|
|
struct linux_wait4_args {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
struct rusage *rusage;
|
|
};
|
|
|
|
int
|
|
linux_wait4(struct proc *p, struct linux_wait4_args *args, int *retval)
|
|
{
|
|
struct wait4_args {
|
|
int pid;
|
|
int *status;
|
|
int options;
|
|
struct rusage *rusage;
|
|
int compat;
|
|
} tmp;
|
|
int error, tmpstat;
|
|
|
|
#ifdef DEBUG
|
|
printf("Linux-emul(%d): wait4(%d, *, %d, *)\n",
|
|
p->p_pid, args->pid, args->options);
|
|
#endif
|
|
tmp.pid = args->pid;
|
|
tmp.status = args->status;
|
|
tmp.options = args->options;
|
|
tmp.rusage = args->rusage;
|
|
tmp.compat = 0;
|
|
|
|
if (error = wait4(p, &tmp, retval))
|
|
return error;
|
|
if (error = copyin(args->status, &tmpstat, sizeof(int)))
|
|
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));
|
|
}
|