procfs_regs.c revision 168758
1169689Skan/*- 2169689Skan * Copyright (c) 1993 Jan-Simon Pendry 3169689Skan * Copyright (c) 1993 4169689Skan * The Regents of the University of California. All rights reserved. 5169689Skan * 6169689Skan * This code is derived from software contributed to Berkeley by 7169689Skan * Jan-Simon Pendry. 8169689Skan * 9169689Skan * Redistribution and use in source and binary forms, with or without 10169689Skan * modification, are permitted provided that the following conditions 11169689Skan * are met: 12169689Skan * 1. Redistributions of source code must retain the above copyright 13169689Skan * notice, this list of conditions and the following disclaimer. 14169689Skan * 2. Redistributions in binary form must reproduce the above copyright 15169689Skan * notice, this list of conditions and the following disclaimer in the 16169689Skan * documentation and/or other materials provided with the distribution. 17169689Skan * 4. Neither the name of the University nor the names of its contributors 18169689Skan * may be used to endorse or promote products derived from this software 19169689Skan * without specific prior written permission. 20169689Skan * 21169689Skan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22169689Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23169689Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24169689Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25169689Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26169689Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27169689Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28169689Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29169689Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30169689Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31169689Skan * SUCH DAMAGE. 32169689Skan * 33169689Skan * @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94 34169689Skan * 35169689Skan * From: 36169689Skan * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 37169689Skan * $FreeBSD: head/sys/fs/procfs/procfs_regs.c 168758 2007-04-15 13:24:03Z des $ 38169689Skan */ 39169689Skan 40169689Skan#include "opt_compat.h" 41169689Skan 42169689Skan#include <sys/param.h> 43169689Skan#include <sys/systm.h> 44169689Skan#include <sys/lock.h> 45169689Skan#include <sys/mutex.h> 46169689Skan#include <sys/proc.h> 47169689Skan#include <sys/ptrace.h> 48169689Skan#include <sys/uio.h> 49169689Skan 50169689Skan#include <machine/reg.h> 51169689Skan 52169689Skan#include <fs/pseudofs/pseudofs.h> 53169689Skan#include <fs/procfs/procfs.h> 54169689Skan 55169689Skan#ifdef COMPAT_IA32 56169689Skan#include <sys/procfs.h> 57169689Skan#include <machine/fpu.h> 58169689Skan#include <compat/ia32/ia32_reg.h> 59169689Skan 60169689Skanextern struct sysentvec ia32_freebsd_sysvec; 61169689Skan/* 62169689Skan * PROC(write, regs, td2, &r) becomes 63169689Skan * proc_write_regs(td2, &r) or 64169689Skan * proc_write_regs32(td2, &r32) 65169689Skan * 66169689Skan * UIOMOVE_FROMBUF(r, uio) becomes 67169689Skan * uiomove_frombuf(&r, sizeof(r), uio) or 68169689Skan * uiomove_frombuf(&r32, sizeof(r32), uio) 69169689Skan */ 70169689Skan#define PROC(d, w, t, r) wrap32 ? \ 71169689Skan proc_ ## d ## _ ## w ## 32(t, r ## 32) : \ 72169689Skan proc_ ## d ## _ ## w(t, r) 73169689Skan#define UIOMOVE_FROMBUF(k, u) wrap32 ? \ 74169689Skan uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \ 75169689Skan uiomove_frombuf(& k, sizeof(k), u) 76169689Skan#else 77169689Skan#define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r) 78169689Skan#define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u) 79169689Skan#endif 80169689Skan 81169689Skanint 82169689Skanprocfs_doprocregs(PFS_FILL_ARGS) 83169689Skan{ 84169689Skan int error; 85169689Skan struct reg r; 86169689Skan struct thread *td2; 87169689Skan#ifdef COMPAT_IA32 88169689Skan struct reg32 r32; 89169689Skan int wrap32 = 0; 90169689Skan#endif 91169689Skan 92169689Skan if (uio->uio_offset != 0) 93169689Skan return (0); 94169689Skan 95169689Skan PROC_LOCK(p); 96169689Skan PROC_ASSERT_HELD(p); 97169689Skan if (p_candebug(td, p)) { 98169689Skan PROC_UNLOCK(p); 99169689Skan return (EPERM); 100169689Skan } 101169689Skan 102169689Skan /* XXXKSE: */ 103169689Skan td2 = FIRST_THREAD_IN_PROC(p); 104169689Skan#ifdef COMPAT_IA32 105169689Skan if (td->td_proc->p_sysent == &ia32_freebsd_sysvec) { 106169689Skan if (td2->td_proc->p_sysent != &ia32_freebsd_sysvec) { 107169689Skan PROC_UNLOCK(p); 108169689Skan return (EINVAL); 109169689Skan } 110169689Skan wrap32 = 1; 111169689Skan } 112169689Skan#endif 113169689Skan error = PROC(read, regs, td2, &r); 114169689Skan if (error == 0) { 115169689Skan PROC_UNLOCK(p); 116169689Skan error = UIOMOVE_FROMBUF(r, uio); 117169689Skan PROC_LOCK(p); 118169689Skan } 119169689Skan if (error == 0 && uio->uio_rw == UIO_WRITE) { 120169689Skan if (!P_SHOULDSTOP(p)) 121169689Skan error = EBUSY; 122169689Skan else 123169689Skan /* XXXKSE: */ 124169689Skan error = PROC(write, regs, td2, &r); 125169689Skan } 126169689Skan PROC_UNLOCK(p); 127169689Skan 128169689Skan return (error); 129169689Skan} 130169689Skan