1 /* 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1993 Jan-Simon Pendry 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)procfs_machdep.c 8.3 (Berkeley) 1/27/94 38 * 39 * From: 40 * $FreeBSD: src/sys/i386/i386/procfs_machdep.c,v 1.14 1999/10/11 14:50:03 peter Exp $ 41 * $DragonFly: src/sys/platform/pc64/amd64/procfs_machdep.c,v 1.2 2007/09/24 03:24:45 yanyh Exp $ 42 */ 43 44 /* 45 * Functions to be implemented here are: 46 * 47 * procfs_read_regs(lwp, regs) 48 * Get the current user-visible register set from the process 49 * and copy it into the regs structure (<machine/reg.h>). 50 * The process is stopped at the time read_regs is called. 51 * 52 * procfs_write_regs(lwp, regs) 53 * Update the current register set from the passed in regs 54 * structure. Take care to avoid clobbering special CPU 55 * registers or privileged bits in the PSL. 56 * Depending on the architecture this may have fix-up work to do, 57 * especially if the IAR or PCW are modified. 58 * The process is stopped at the time write_regs is called. 59 * 60 * procfs_read_fpregs, procfs_write_fpregs 61 * deal with the floating point register set, otherwise as above. 62 * 63 * procfs_read_dbregs, procfs_write_dbregs 64 * deal with the processor debug register set, otherwise as above. 65 * 66 * procfs_sstep(lwp) 67 * Arrange for the process to trap after executing a single instruction. 68 * 69 */ 70 71 #include <sys/param.h> 72 #include <sys/proc.h> 73 #include <sys/ptrace.h> 74 #include <sys/vnode.h> 75 #include <sys/reg.h> 76 #include <machine/md_var.h> 77 #include <vfs/procfs/procfs.h> 78 79 #include <vm/vm.h> 80 #include <sys/lock.h> 81 #include <vm/pmap.h> 82 #include <vm/vm_map.h> 83 84 int 85 procfs_read_regs(struct lwp *lp, struct reg *regs) 86 { 87 return (fill_regs(lp, regs)); 88 } 89 90 int 91 procfs_write_regs(struct lwp *lp, struct reg *regs) 92 { 93 return (set_regs(lp, regs)); 94 } 95 96 int 97 procfs_read_dbregs(struct lwp *lp, struct dbreg *dbregs) 98 { 99 return (fill_dbregs(lp, dbregs)); 100 } 101 102 int 103 procfs_write_dbregs(struct lwp *lp, struct dbreg *dbregs) 104 { 105 return (set_dbregs(lp, dbregs)); 106 } 107 108 /* 109 * Ptrace doesn't support fpregs at all, and there are no security holes 110 * or translations for fpregs, so we can just copy them. 111 */ 112 113 int 114 procfs_read_fpregs(struct lwp *lp, struct fpreg *fpregs) 115 { 116 return (fill_fpregs(lp, fpregs)); 117 } 118 119 int 120 procfs_write_fpregs(struct lwp *lp, struct fpreg *fpregs) 121 { 122 return (set_fpregs(lp, fpregs)); 123 } 124 125 int 126 procfs_sstep(struct lwp *lp) 127 { 128 return (ptrace_single_step(lp)); 129 } 130