1 /* 2 * Copyright (c) 1993 The Regents of the University of California. 3 * Copyright (c) 1993 Jan-Simon Pendry 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * From: 38 * Id: procfs_regs.c,v 4.1 1993/12/17 10:47:45 jsp Rel 39 * 40 * $Id: procfs_regs.c,v 1.5 1994/05/04 03:42:21 cgd Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/time.h> 46 #include <sys/kernel.h> 47 #include <sys/proc.h> 48 #include <sys/vnode.h> 49 #include <sys/ptrace.h> 50 #include <machine/reg.h> 51 #include <miscfs/procfs/procfs.h> 52 53 pfs_doregs(curp, p, pfs, uio) 54 struct proc *curp; 55 struct proc *p; 56 struct pfsnode *pfs; 57 struct uio *uio; 58 { 59 #if defined(PT_GETREGS) || defined(PT_SETREGS) 60 int error; 61 struct reg r; 62 char *kv; 63 int kl; 64 65 kl = sizeof(r); 66 kv = (char *) &r; 67 68 kv += uio->uio_offset; 69 kl -= uio->uio_offset; 70 if (kl > uio->uio_resid) 71 kl = uio->uio_resid; 72 73 if (kl < 0) 74 error = EINVAL; 75 else 76 error = process_read_regs(p, &r); 77 if (error == 0) 78 error = uiomove(kv, kl, uio); 79 if (error == 0 && uio->uio_rw == UIO_WRITE) { 80 if ((p->p_flag & SSTOP) == 0) 81 error = EBUSY; 82 else 83 error = process_write_regs(p, &r); 84 } 85 86 uio->uio_offset = 0; 87 return (error); 88 #else 89 return EINVAL; 90 #endif 91 } 92 93 int 94 procfs_validregs(procp) 95 struct proc *procp; 96 { 97 #if defined(PT_SETREGS) || defined(PT_GETREGS) 98 return ((procp->p_flag & P_SYSTEM) == 0); 99 #else 100 return (0); 101 #endif 102 } 103 104 pfs_dofpregs(curp, p, pfs, uio) 105 struct proc *curp; 106 struct proc *p; 107 struct pfsnode *pfs; 108 struct uio *uio; 109 { 110 #if defined(PT_GETFPREGS) || defined(PT_SETFPREGS) 111 int error; 112 struct fpreg r; 113 char *kv; 114 int kl; 115 116 kl = sizeof(r); 117 kv = (char *) &r; 118 119 kv += uio->uio_offset; 120 kl -= uio->uio_offset; 121 if (kl > uio->uio_resid) 122 kl = uio->uio_resid; 123 124 if (kl < 0) 125 error = EINVAL; 126 else 127 error = process_read_fpregs(p, &r); 128 if (error == 0) 129 error = uiomove(kv, kl, uio); 130 if (error == 0 && uio->uio_rw == UIO_WRITE) { 131 if ((p->p_flag & SSTOP) == 0) 132 error = EBUSY; 133 else 134 error = process_write_fpregs(p, &r); 135 } 136 137 uio->uio_offset = 0; 138 return (error); 139 #else 140 return EINVAL; 141 #endif 142 } 143 144 int 145 procfs_validfpregs(procp) 146 struct proc *procp; 147 { 148 #if defined(PT_SETFPREGS) || defined(PT_GETFPREGS) 149 return ((procp->p_flag & SSYS) == 0); 150 #else 151 return (0); 152 #endif 153 } 154