procfs_fpregs.c revision 216120
178266Snik/*- 278266Snik * Copyright (c) 1993 Jan-Simon Pendry 378266Snik * Copyright (c) 1993 4174425Sdougb * The Regents of the University of California. All rights reserved. 5174425Sdougb * 6174425Sdougb * This code is derived from software contributed to Berkeley by 778266Snik * Jan-Simon Pendry. 878266Snik * 978266Snik * Redistribution and use in source and binary forms, with or without 1078266Snik * modification, are permitted provided that the following conditions 11174425Sdougb * are met: 12174425Sdougb * 1. Redistributions of source code must retain the above copyright 1378266Snik * notice, this list of conditions and the following disclaimer. 14174425Sdougb * 2. Redistributions in binary form must reproduce the above copyright 15174425Sdougb * notice, this list of conditions and the following disclaimer in the 16174425Sdougb * documentation and/or other materials provided with the distribution. 1778266Snik * 4. Neither the name of the University nor the names of its contributors 18174425Sdougb * may be used to endorse or promote products derived from this software 1978266Snik * without specific prior written permission. 20174425Sdougb * 21174425Sdougb * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2278266Snik * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23174425Sdougb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24174425Sdougb * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2578266Snik * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26174425Sdougb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27174425Sdougb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28174425Sdougb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2978266Snik * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30174425Sdougb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31174425Sdougb * SUCH DAMAGE. 32174425Sdougb * 33174425Sdougb * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94 34174425Sdougb * 3578266Snik * From: 36174425Sdougb * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 37174425Sdougb * $FreeBSD: head/sys/fs/procfs/procfs_fpregs.c 216120 2010-12-02 12:44:51Z kib $ 3878266Snik */ 39174425Sdougb 40174425Sdougb#include "opt_compat.h" 4178266Snik 42174425Sdougb#include <sys/param.h> 43174425Sdougb#include <sys/systm.h> 44174425Sdougb#include <sys/lock.h> 4578266Snik#include <sys/mutex.h> 46174425Sdougb#include <sys/proc.h> 47174425Sdougb#include <sys/ptrace.h> 4878266Snik#include <sys/sysent.h> 49174425Sdougb#include <sys/uio.h> 50174425Sdougb 51174425Sdougb#include <machine/reg.h> 5278266Snik 5378266Snik#include <fs/pseudofs/pseudofs.h> 5478266Snik#include <fs/procfs/procfs.h> 5578266Snik 5678266Snik#ifdef COMPAT_FREEBSD32 5778266Snik#include <sys/procfs.h> 5878266Snik#include <machine/fpu.h> 5978266Snik 6078266Snik/* 6178266Snik * PROC(write, fpregs, td2, &r) becomes 6278266Snik * proc_write_fpregs(td2, &r) or 6378266Snik * proc_write_fpregs32(td2, &r32) 6478266Snik * 6578266Snik * UIOMOVE_FROMBUF(r, uio) becomes 6678266Snik * uiomove_frombuf(&r, sizeof(r), uio) or 6778266Snik * uiomove_frombuf(&r32, sizeof(r32), uio) 6878266Snik */ 69174425Sdougb#define PROC(d, w, t, r) wrap32 ? \ 70174425Sdougb proc_ ## d ## _ ## w ## 32(t, r ## 32) : \ 71174425Sdougb proc_ ## d ## _ ## w(t, r) 72174425Sdougb#define UIOMOVE_FROMBUF(k, u) wrap32 ? \ 73174425Sdougb uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \ 7478266Snik uiomove_frombuf(& k, sizeof(k), u) 75174425Sdougb#else 7678266Snik#define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r) 77174425Sdougb#define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u) 78174425Sdougb#endif 79174425Sdougb 8078266Snikint 81174425Sdougbprocfs_doprocfpregs(PFS_FILL_ARGS) 8278266Snik{ 83174425Sdougb int error; 84174425Sdougb struct fpreg r; 8578266Snik struct thread *td2; 86174425Sdougb#ifdef COMPAT_FREEBSD32 8778266Snik struct fpreg32 r32; 88174425Sdougb int wrap32 = 0; 89174425Sdougb#endif 90174425Sdougb 9178266Snik if (uio->uio_offset != 0) 92174425Sdougb return (0); 93174425Sdougb 9478266Snik PROC_LOCK(p); 95174425Sdougb KASSERT(p->p_lock > 0, ("proc not held")); 96174425Sdougb if (p_candebug(td, p)) { 9778266Snik PROC_UNLOCK(p); 98174425Sdougb return (EPERM); 99174425Sdougb } 10078266Snik if (!P_SHOULDSTOP(p)) { 101174425Sdougb PROC_UNLOCK(p); 102174425Sdougb return (EBUSY); 103174425Sdougb } 104174425Sdougb 105174425Sdougb /* XXXKSE: */ 10678266Snik td2 = FIRST_THREAD_IN_PROC(p); 10778266Snik#ifdef COMPAT_FREEBSD32 10878266Snik if (SV_CURPROC_FLAG(SV_ILP32)) { 10978266Snik if ((td2->td_proc->p_sysent->sv_flags & SV_ILP32) == 0) { 11078266Snik PROC_UNLOCK(p); 111174425Sdougb return (EINVAL); 112174425Sdougb } 11378266Snik wrap32 = 1; 114174425Sdougb } 115174425Sdougb#endif 11678266Snik error = PROC(read, fpregs, td2, &r); 117174425Sdougb if (error == 0) { 118174425Sdougb PROC_UNLOCK(p); 11978266Snik error = UIOMOVE_FROMBUF(r, uio); 120174425Sdougb PROC_LOCK(p); 121174425Sdougb } 122174425Sdougb if (error == 0 && uio->uio_rw == UIO_WRITE) { 123174425Sdougb if (!P_SHOULDSTOP(p)) 124174425Sdougb error = EBUSY; 125174425Sdougb else 126174425Sdougb /* XXXKSE: */ 12778266Snik error = PROC(write, fpregs, td2, &r); 128174425Sdougb } 12978266Snik PROC_UNLOCK(p); 130174425Sdougb 131174425Sdougb return (error); 13278266Snik} 133174425Sdougb