text: /*
   * Copyright (c) 1993
   *	The Regents of the University of California.  All rights reserved.
   * Copyright (c) 1993 Jan-Simon Pendry
   *
   * This code is derived from software contributed to Berkeley by
   * Jan-Simon Pendry.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)procfs_machdep.c	8.3 (Berkeley) 1/27/94
   *
   * From:
   * $FreeBSD: src/sys/i386/i386/procfs_machdep.c,v 1.14 1999/10/11 14:50:03 peter Exp $
   * $DragonFly: src/sys/platform/pc32/i386/procfs_machdep.c,v 1.9 2007/02/19 01:14:23 corecode Exp $
   */
  
  /*
   * Functions to be implemented here are:
   *
   * procfs_read_regs(lwp, regs)
   *	Get the current user-visible register set from the process
   *	and copy it into the regs structure (<machine/reg.h>).
   *	The process is stopped at the time read_regs is called.
   *
   * procfs_write_regs(lwp, regs)
   *	Update the current register set from the passed in regs
   *	structure.  Take care to avoid clobbering special CPU
   *	registers or privileged bits in the PSL.
   *	Depending on the architecture this may have fix-up work to do,
   *	especially if the IAR or PCW are modified.
   *	The process is stopped at the time write_regs is called.
   *
   * procfs_read_fpregs, procfs_write_fpregs
   *	deal with the floating point register set, otherwise as above.
   *
   * procfs_read_dbregs, procfs_write_dbregs
   *	deal with the processor debug register set, otherwise as above.
   *
   * procfs_sstep(lwp)
   *	Arrange for the process to trap after executing a single instruction.
   *
   */
  
  #include <sys/param.h>
  #include <sys/proc.h>
  #include <sys/ptrace.h>
  #include <sys/vnode.h>
  #include <sys/reg.h>
  #include <machine/md_var.h>
  #include <vfs/procfs/procfs.h>
  
  #include <vm/vm.h>
  #include <sys/lock.h>
  #include <vm/pmap.h>
  #include <vm/vm_map.h>
  
  int
  procfs_read_regs(struct lwp *lp, struct reg *regs)
  {
  	return (fill_regs(lp, regs));
  }
  
  int
  procfs_write_regs(struct lwp *lp, struct reg *regs)
  {
  	return (set_regs(lp, regs));
  }
  
  int
  procfs_read_dbregs(struct lwp *lp, struct dbreg *dbregs)
  {
  	return (fill_dbregs(lp, dbregs));
  }
  
  int
  procfs_write_dbregs(struct lwp *lp, struct dbreg *dbregs)
  {
  	return (set_dbregs(lp, dbregs));
  }
  
  /*
   * Ptrace doesn't support fpregs at all, and there are no security holes
   * or translations for fpregs, so we can just copy them.
   */
  
  int
  procfs_read_fpregs(struct lwp *lp, struct fpreg *fpregs)
  {
  	return (fill_fpregs(lp, fpregs));
  }
  
  int
  procfs_write_fpregs(struct lwp *lp, struct fpreg *fpregs)
  {
  	return (set_fpregs(lp, fpregs));
  }
  
  int
  procfs_sstep(struct lwp *lp)
  {
  	return (ptrace_single_step(lp));
  }
  