1 /*- 2 * Copyright (c) 1993 Jan-Simon Pendry 3 * Copyright (c) 1993 4 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94 34 * 35 * From: 36 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 37 * $FreeBSD$ 38 */ 39 40 #include "opt_compat.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/lock.h> 45 #include <sys/mutex.h> 46 #include <sys/proc.h> 47 #include <sys/ptrace.h> 48 #include <sys/sysent.h> 49 #include <sys/uio.h> 50 51 #include <machine/reg.h> 52 53 #include <fs/pseudofs/pseudofs.h> 54 #include <fs/procfs/procfs.h> 55 56 #ifdef COMPAT_FREEBSD32 57 #include <sys/procfs.h> 58 #include <machine/fpu.h> 59 60 /* 61 * PROC(write, regs, td2, &r) becomes 62 * proc_write_regs(td2, &r) or 63 * proc_write_regs32(td2, &r32) 64 * 65 * UIOMOVE_FROMBUF(r, uio) becomes 66 * uiomove_frombuf(&r, sizeof(r), uio) or 67 * uiomove_frombuf(&r32, sizeof(r32), uio) 68 */ 69 #define PROC(d, w, t, r) wrap32 ? \ 70 proc_ ## d ## _ ## w ## 32(t, r ## 32) : \ 71 proc_ ## d ## _ ## w(t, r) 72 #define UIOMOVE_FROMBUF(k, u) wrap32 ? \ 73 uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \ 74 uiomove_frombuf(& k, sizeof(k), u) 75 #else 76 #define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r) 77 #define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u) 78 #endif 79 80 int 81 procfs_doprocregs(PFS_FILL_ARGS) 82 { 83 int error; 84 struct reg r; 85 struct thread *td2; 86 #ifdef COMPAT_FREEBSD32 87 struct reg32 r32; 88 int wrap32 = 0; 89 #endif 90 91 if (uio->uio_offset != 0) 92 return (0); 93 94 PROC_LOCK(p); 95 PROC_ASSERT_HELD(p); 96 if (p_candebug(td, p)) { 97 PROC_UNLOCK(p); 98 return (EPERM); 99 } 100 if (!P_SHOULDSTOP(p)) { 101 PROC_UNLOCK(p); 102 return (EBUSY); 103 } 104 105 /* XXXKSE: */ 106 td2 = FIRST_THREAD_IN_PROC(p); 107 #ifdef COMPAT_FREEBSD32 108 if (SV_CURPROC_FLAG(SV_ILP32)) { 109 if ((SV_PROC_FLAG(td2->td_proc, SV_ILP32)) == 0) { 110 PROC_UNLOCK(p); 111 return (EINVAL); 112 } 113 wrap32 = 1; 114 } 115 #endif 116 error = PROC(read, regs, td2, &r); 117 if (error == 0) { 118 PROC_UNLOCK(p); 119 error = UIOMOVE_FROMBUF(r, uio); 120 PROC_LOCK(p); 121 } 122 if (error == 0 && uio->uio_rw == UIO_WRITE) { 123 if (!P_SHOULDSTOP(p)) 124 error = EBUSY; 125 else 126 /* XXXKSE: */ 127 error = PROC(write, regs, td2, &r); 128 } 129 PROC_UNLOCK(p); 130 131 return (error); 132 } 133