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procfs_regs.c revision 1.3 
      1  1.1  cgd /*
      2  1.1  cgd  * Copyright (c) 1993 The Regents of the University of California.
      3  1.1  cgd  * Copyright (c) 1993 Jan-Simon Pendry
      4  1.1  cgd  * All rights reserved.
      5  1.1  cgd  *
      6  1.1  cgd  * This code is derived from software contributed to Berkeley by
      7  1.1  cgd  * Jan-Simon Pendry.
      8  1.1  cgd  *
      9  1.1  cgd  * Redistribution and use in source and binary forms, with or without
     10  1.1  cgd  * modification, are permitted provided that the following conditions
     11  1.1  cgd  * are met:
     12  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
     13  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     14  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     16  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     17  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     18  1.1  cgd  *    must display the following acknowledgement:
     19  1.1  cgd  *	This product includes software developed by the University of
     20  1.1  cgd  *	California, Berkeley and its contributors.
     21  1.1  cgd  * 4. Neither the name of the University nor the names of its contributors
     22  1.1  cgd  *    may be used to endorse or promote products derived from this software
     23  1.1  cgd  *    without specific prior written permission.
     24  1.1  cgd  *
     25  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  1.1  cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  1.1  cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  1.1  cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  1.1  cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  1.1  cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  1.1  cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  1.1  cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  1.1  cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  1.1  cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  1.1  cgd  * SUCH DAMAGE.
     36  1.1  cgd  *
     37  1.1  cgd  * From:
     38  1.1  cgd  *	Id: procfs_regs.c,v 4.1 1993/12/17 10:47:45 jsp Rel
     39  1.1  cgd  *
     40  1.3  cgd  *	$Id: procfs_regs.c,v 1.3 1994/01/28 07:03:28 cgd Exp $
     41  1.1  cgd  */
     42  1.1  cgd 
     43  1.1  cgd #include <sys/param.h>
     44  1.1  cgd #include <sys/systm.h>
     45  1.1  cgd #include <sys/time.h>
     46  1.1  cgd #include <sys/kernel.h>
     47  1.1  cgd #include <sys/proc.h>
     48  1.1  cgd #include <sys/vnode.h>
     49  1.2  cgd #include <sys/ptrace.h>
     50  1.1  cgd #include <machine/reg.h>
     51  1.1  cgd #include <miscfs/procfs/procfs.h>
     52  1.1  cgd 
     53  1.1  cgd pfs_doregs(curp, p, pfs, uio)
     54  1.1  cgd 	struct proc *curp;
     55  1.1  cgd 	struct proc *p;
     56  1.1  cgd 	struct pfsnode *pfs;
     57  1.1  cgd 	struct uio *uio;
     58  1.1  cgd {
     59  1.3  cgd #if defined(PT_GETREGS) || defined(PT_SETREGS)
     60  1.1  cgd 	int error;
     61  1.1  cgd 	struct reg r;
     62  1.1  cgd 	char *kv;
     63  1.1  cgd 	int kl;
     64  1.1  cgd 
     65  1.1  cgd 	kl = sizeof(r);
     66  1.1  cgd 	kv = (char *) &r;
     67  1.1  cgd 
     68  1.1  cgd 	kv += uio->uio_offset;
     69  1.1  cgd 	kl -= uio->uio_offset;
     70  1.1  cgd 	if (kl > uio->uio_resid)
     71  1.1  cgd 		kl = uio->uio_resid;
     72  1.1  cgd 
     73  1.1  cgd 	if (kl < 0)
     74  1.1  cgd 		error = EINVAL;
     75  1.1  cgd 	else
     76  1.2  cgd 		error = process_read_regs(p, &r);
     77  1.1  cgd 	if (error == 0)
     78  1.1  cgd 		error = uiomove(kv, kl, uio);
     79  1.1  cgd 	if (error == 0 && uio->uio_rw == UIO_WRITE) {
     80  1.1  cgd 		if ((p->p_flag & SSTOP) == 0)
     81  1.1  cgd 			error = EBUSY;
     82  1.1  cgd 		else
     83  1.2  cgd 			error = process_write_regs(p, &r);
     84  1.1  cgd 	}
     85  1.1  cgd 
     86  1.1  cgd 	uio->uio_offset = 0;
     87  1.1  cgd 	return (error);
     88  1.3  cgd #else
     89  1.3  cgd 	return EINVAL;
     90  1.3  cgd #endif
     91  1.3  cgd }
     92  1.3  cgd 
     93  1.3  cgd pfs_dofpregs(curp, p, pfs, uio)
     94  1.3  cgd 	struct proc *curp;
     95  1.3  cgd 	struct proc *p;
     96  1.3  cgd 	struct pfsnode *pfs;
     97  1.3  cgd 	struct uio *uio;
     98  1.3  cgd {
     99  1.3  cgd #if defined(PT_GETFPREGS) || defined(PT_SETFPREGS)
    100  1.3  cgd 	int error;
    101  1.3  cgd 	struct fpreg r;
    102  1.3  cgd 	char *kv;
    103  1.3  cgd 	int kl;
    104  1.3  cgd 
    105  1.3  cgd 	kl = sizeof(r);
    106  1.3  cgd 	kv = (char *) &r;
    107  1.3  cgd 
    108  1.3  cgd 	kv += uio->uio_offset;
    109  1.3  cgd 	kl -= uio->uio_offset;
    110  1.3  cgd 	if (kl > uio->uio_resid)
    111  1.3  cgd 		kl = uio->uio_resid;
    112  1.3  cgd 
    113  1.3  cgd 	if (kl < 0)
    114  1.3  cgd 		error = EINVAL;
    115  1.3  cgd 	else
    116  1.3  cgd 		error = process_read_fpregs(p, &r);
    117  1.3  cgd 	if (error == 0)
    118  1.3  cgd 		error = uiomove(kv, kl, uio);
    119  1.3  cgd 	if (error == 0 && uio->uio_rw == UIO_WRITE) {
    120  1.3  cgd 		if ((p->p_flag & SSTOP) == 0)
    121  1.3  cgd 			error = EBUSY;
    122  1.3  cgd 		else
    123  1.3  cgd 			error = process_write_fpregs(p, &r);
    124  1.3  cgd 	}
    125  1.3  cgd 
    126  1.3  cgd 	uio->uio_offset = 0;
    127  1.3  cgd 	return (error);
    128  1.3  cgd #else
    129  1.3  cgd 	return EINVAL;
    130  1.3  cgd #endif
    131  1.1  cgd }
    132