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 * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94 36 * 37 * From: 38 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 39 * $FreeBSD$ 40 */ 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/uio.h> 49 50 #include <fs/pseudofs/pseudofs.h> 51 #include <fs/procfs/procfs.h> 52 53 #ifdef COMPAT_FREEBSD32 54 #include <sys/sysent.h> 55 #include <sys/procfs.h> 56 #include <machine/fpu.h> 57 58 /* 59 * PROC(write, fpregs, td2, &r) becomes 60 * proc_write_fpregs(td2, &r) or 61 * proc_write_fpregs32(td2, &r32) 62 * 63 * UIOMOVE_FROMBUF(r, uio) becomes 64 * uiomove_frombuf(&r, sizeof(r), uio) or 65 * uiomove_frombuf(&r32, sizeof(r32), uio) 66 */ 67 #define PROC(d, w, t, r) wrap32 ? \ 68 proc_ ## d ## _ ## w ## 32(t, r ## 32) : \ 69 proc_ ## d ## _ ## w(t, r) 70 #define UIOMOVE_FROMBUF(k, u) wrap32 ? \ 71 uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \ 72 uiomove_frombuf(& k, sizeof(k), u) 73 #else 74 #define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r) 75 #define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u) 76 #endif 77 78 int 79 procfs_doprocfpregs(PFS_FILL_ARGS) 80 { 81 int error; 82 struct fpreg r; 83 struct thread *td2; 84 #ifdef COMPAT_FREEBSD32 85 struct fpreg32 r32; 86 int wrap32 = 0; 87 #endif 88 89 if (uio->uio_offset != 0) 90 return (0); 91 92 PROC_LOCK(p); 93 PROC_ASSERT_HELD(p); 94 if (p_candebug(td, p)) { 95 PROC_UNLOCK(p); 96 return (EPERM); 97 } 98 if (!P_SHOULDSTOP(p)) { 99 PROC_UNLOCK(p); 100 return (EBUSY); 101 } 102 103 td2 = FIRST_THREAD_IN_PROC(p); 104 #ifdef COMPAT_FREEBSD32 105 if (SV_CURPROC_FLAG(SV_ILP32)) { 106 if (SV_PROC_FLAG(td2->td_proc, SV_ILP32) == 0) { 107 PROC_UNLOCK(p); 108 return (EINVAL); 109 } 110 wrap32 = 1; 111 memset(&r32, 0, sizeof(r32)); 112 } else 113 #endif 114 memset(&r, 0, sizeof(r)); 115 error = PROC(read, fpregs, td2, &r); 116 if (error == 0) { 117 PROC_UNLOCK(p); 118 error = UIOMOVE_FROMBUF(r, uio); 119 PROC_LOCK(p); 120 } 121 if (error == 0 && uio->uio_rw == UIO_WRITE) { 122 if (!P_SHOULDSTOP(p)) 123 error = EBUSY; 124 else 125 /* XXXKSE: */ 126 error = PROC(write, fpregs, td2, &r); 127 } 128 PROC_UNLOCK(p); 129 130 return (error); 131 } 132