1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1993 Jan-Simon Pendry 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * From: 36 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/proc.h> 44 #include <sys/ptrace.h> 45 #include <sys/uio.h> 46 47 #include <fs/pseudofs/pseudofs.h> 48 #include <fs/procfs/procfs.h> 49 50 #ifdef COMPAT_FREEBSD32 51 #include <sys/procfs.h> 52 #include <sys/sysent.h> 53 #include <machine/fpu.h> 54 55 /* 56 * PROC(write, regs, td2, &r) becomes 57 * proc_write_regs(td2, &r) or 58 * proc_write_regs32(td2, &r32) 59 * 60 * UIOMOVE_FROMBUF(r, uio) becomes 61 * uiomove_frombuf(&r, sizeof(r), uio) or 62 * uiomove_frombuf(&r32, sizeof(r32), uio) 63 */ 64 #define PROC(d, w, t, r) wrap32 ? \ 65 proc_ ## d ## _ ## w ## 32(t, r ## 32) : \ 66 proc_ ## d ## _ ## w(t, r) 67 #define UIOMOVE_FROMBUF(k, u) wrap32 ? \ 68 uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \ 69 uiomove_frombuf(& k, sizeof(k), u) 70 #else 71 #define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r) 72 #define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u) 73 #endif 74 75 int 76 procfs_doprocregs(PFS_FILL_ARGS) 77 { 78 int error; 79 struct reg r; 80 struct thread *td2; 81 #ifdef COMPAT_FREEBSD32 82 struct reg32 r32; 83 int wrap32 = 0; 84 #endif 85 86 if (uio->uio_offset != 0) 87 return (0); 88 89 PROC_LOCK(p); 90 PROC_ASSERT_HELD(p); 91 if (p_candebug(td, p)) { 92 PROC_UNLOCK(p); 93 return (EPERM); 94 } 95 if (!P_SHOULDSTOP(p)) { 96 PROC_UNLOCK(p); 97 return (EBUSY); 98 } 99 100 td2 = FIRST_THREAD_IN_PROC(p); 101 #ifdef COMPAT_FREEBSD32 102 if (SV_CURPROC_FLAG(SV_ILP32)) { 103 if ((SV_PROC_FLAG(td2->td_proc, SV_ILP32)) == 0) { 104 PROC_UNLOCK(p); 105 return (EINVAL); 106 } 107 wrap32 = 1; 108 memset(&r32, 0, sizeof(r32)); 109 } else 110 #endif 111 memset(&r, 0, sizeof(r)); 112 error = PROC(read, regs, td2, &r); 113 if (error == 0) { 114 PROC_UNLOCK(p); 115 error = UIOMOVE_FROMBUF(r, uio); 116 PROC_LOCK(p); 117 } 118 if (error == 0 && uio->uio_rw == UIO_WRITE) { 119 if (!P_SHOULDSTOP(p)) 120 error = EBUSY; 121 else 122 /* XXXKSE: */ 123 error = PROC(write, regs, td2, &r); 124 } 125 PROC_UNLOCK(p); 126 127 return (error); 128 } 129