freebsd_ptrace.c revision 1.8
1 /* $NetBSD: freebsd_ptrace.c,v 1.8 2005/09/13 01:42:32 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93 37 */ 38 39 /*- 40 * Copyright (c) 1994 Christopher G. Demetriou. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: freebsd_ptrace.c,v 1.8 2005/09/13 01:42:32 christos Exp $"); 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/proc.h> 79 #include <sys/errno.h> 80 #include <sys/ptrace.h> 81 #include <sys/uio.h> 82 #include <sys/user.h> 83 #include <sys/mount.h> 84 #include <sys/sa.h> 85 #include <sys/syscallargs.h> 86 87 #include <compat/sys/signal.h> 88 #include <compat/sys/signalvar.h> 89 90 #include <machine/reg.h> 91 #include <machine/freebsd_machdep.h> 92 93 #include <compat/common/compat_util.h> 94 #include <compat/freebsd/freebsd_syscallargs.h> 95 #include <compat/freebsd/freebsd_ptrace.h> 96 97 /* 98 * Process debugging system call. 99 */ 100 int 101 freebsd_sys_ptrace(l, v, retval) 102 struct lwp *l; 103 void *v; 104 register_t *retval; 105 { 106 struct freebsd_sys_ptrace_args /* { 107 syscallarg(int) req; 108 syscallarg(pid_t) pid; 109 syscallarg(caddr_t) addr; 110 syscallarg(int) data; 111 } */ *uap = v; 112 struct proc *p = l->l_proc; 113 int error; 114 caddr_t sg; 115 struct { 116 struct reg regs; 117 struct fpreg fpregs; 118 } *nrp; 119 struct sys_ptrace_args npa; 120 struct freebsd_ptrace_reg fr; 121 122 switch (SCARG(uap, req)) { 123 #ifdef PT_STEP 124 case FREEBSD_PT_STEP: 125 SCARG(&npa, req) = PT_STEP; 126 SCARG(&npa, pid) = SCARG(uap, pid); 127 SCARG(&npa, addr) = SCARG(uap, addr); 128 SCARG(&npa, data) = SCARG(uap, data); 129 return sys_ptrace(l, &npa, retval); 130 #endif 131 case FREEBSD_PT_TRACE_ME: 132 case FREEBSD_PT_READ_I: 133 case FREEBSD_PT_READ_D: 134 case FREEBSD_PT_WRITE_I: 135 case FREEBSD_PT_WRITE_D: 136 case FREEBSD_PT_CONTINUE: 137 case FREEBSD_PT_KILL: 138 /* These requests are compatible with NetBSD */ 139 return sys_ptrace(l, uap, retval); 140 141 case FREEBSD_PT_READ_U: 142 case FREEBSD_PT_WRITE_U: 143 sg = stackgap_init(p, 0); 144 nrp = stackgap_alloc(p, &sg, sizeof(*nrp)); 145 #ifdef PT_GETREGS 146 SCARG(&npa, req) = PT_GETREGS; 147 SCARG(&npa, pid) = SCARG(uap, pid); 148 SCARG(&npa, addr) = (caddr_t)&nrp->regs; 149 if ((error = sys_ptrace(l, &npa, retval)) != 0) 150 return error; 151 #endif 152 #ifdef PT_GETFPREGS 153 SCARG(&npa, req) = PT_GETFPREGS; 154 SCARG(&npa, pid) = SCARG(uap, pid); 155 SCARG(&npa, addr) = (caddr_t)&nrp->fpregs; 156 if ((error = sys_ptrace(l, &npa, retval)) != 0) 157 return error; 158 #endif 159 netbsd_to_freebsd_ptrace_regs(&nrp->regs, &nrp->fpregs, &fr); 160 switch (SCARG(uap, req)) { 161 case FREEBSD_PT_READ_U: 162 return freebsd_ptrace_getregs(&fr, SCARG(uap, addr), 163 retval); 164 165 case FREEBSD_PT_WRITE_U: 166 error = freebsd_ptrace_setregs(&fr, 167 SCARG(uap, addr), SCARG(uap, data)); 168 if (error) 169 return error; 170 freebsd_to_netbsd_ptrace_regs(&fr, 171 &nrp->regs, &nrp->fpregs); 172 #ifdef PT_SETREGS 173 SCARG(&npa, req) = PT_SETREGS; 174 SCARG(&npa, pid) = SCARG(uap, pid); 175 SCARG(&npa, addr) = (caddr_t)&nrp->regs; 176 if ((error = sys_ptrace(l, &npa, retval)) != 0) 177 return error; 178 #endif 179 #ifdef PT_SETFPREGS 180 SCARG(&npa, req) = PT_SETFPREGS; 181 SCARG(&npa, pid) = SCARG(uap, pid); 182 SCARG(&npa, addr) = (caddr_t)&nrp->fpregs; 183 if ((error = sys_ptrace(l, &npa, retval)) != 0) 184 return error; 185 #endif 186 return 0; 187 } 188 189 default: /* It was not a legal request. */ 190 return (EINVAL); 191 } 192 193 #ifdef DIAGNOSTIC 194 panic("freebsd_ptrace: impossible"); 195 #endif 196 } 197
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