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 */ 42 43 /* 44 * Functions to be implemented here are: 45 * 46 * procfs_read_regs(lwp, regs) 47 * Get the current user-visible register set from the process 48 * and copy it into the regs structure (<machine/reg.h>). 49 * The process is stopped at the time read_regs is called. 50 * 51 * procfs_write_regs(lwp, regs) 52 * Update the current register set from the passed in regs 53 * structure. Take care to avoid clobbering special CPU 54 * registers or privileged bits in the PSL. 55 * Depending on the architecture this may have fix-up work to do, 56 * especially if the IAR or PCW are modified. 57 * The process is stopped at the time write_regs is called. 58 * 59 * procfs_read_fpregs, procfs_write_fpregs 60 * deal with the floating point register set, otherwise as above. 61 * 62 * procfs_read_dbregs, procfs_write_dbregs 63 * deal with the processor debug register set, otherwise as above. 64 * 65 * procfs_sstep(lwp) 66 * Arrange for the process to trap after executing a single instruction. 67 * 68 */ 69 70 #include <sys/param.h> 71 #include <sys/proc.h> 72 #include <sys/ptrace.h> 73 #include <sys/vnode.h> 74 #include <sys/reg.h> 75 #include <machine/md_var.h> 76 #include <vfs/procfs/procfs.h> 77 78 #include <vm/vm.h> 79 #include <sys/lock.h> 80 #include <vm/pmap.h> 81 #include <vm/vm_map.h> 82 83 int 84 procfs_read_regs(struct lwp *lp, struct reg *regs) 85 { 86 return (fill_regs(lp, regs)); 87 } 88 89 int 90 procfs_write_regs(struct lwp *lp, struct reg *regs) 91 { 92 return (set_regs(lp, regs)); 93 } 94 95 int 96 procfs_read_dbregs(struct lwp *lp, struct dbreg *dbregs) 97 { 98 return (fill_dbregs(lp, dbregs)); 99 } 100 101 int 102 procfs_write_dbregs(struct lwp *lp, struct dbreg *dbregs) 103 { 104 return (set_dbregs(lp, dbregs)); 105 } 106 107 /* 108 * Ptrace doesn't support fpregs at all, and there are no security holes 109 * or translations for fpregs, so we can just copy them. 110 */ 111 112 int 113 procfs_read_fpregs(struct lwp *lp, struct fpreg *fpregs) 114 { 115 return (fill_fpregs(lp, fpregs)); 116 } 117 118 int 119 procfs_write_fpregs(struct lwp *lp, struct fpreg *fpregs) 120 { 121 return (set_fpregs(lp, fpregs)); 122 } 123 124 int 125 procfs_sstep(struct lwp *lp) 126 { 127 return (ptrace_single_step(lp)); 128 } 129