freebsd_ptrace.c revision 1.3.2.1
1 /* $NetBSD: freebsd_ptrace.c,v 1.3.2.1 2001/03/05 22:49:20 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 1994 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1982, 1986, 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/lwp.h> 47 #include <sys/proc.h> 48 #include <sys/errno.h> 49 #include <sys/ptrace.h> 50 #include <sys/uio.h> 51 #include <sys/user.h> 52 #include <sys/mount.h> 53 #include <sys/syscallargs.h> 54 55 #include <machine/reg.h> 56 #include <machine/freebsd_machdep.h> 57 58 #include <compat/freebsd/freebsd_syscallargs.h> 59 #include <compat/common/compat_util.h> 60 #include <compat/freebsd/freebsd_ptrace.h> 61 62 /* 63 * Process debugging system call. 64 */ 65 int 66 freebsd_sys_ptrace(l, v, retval) 67 struct lwp *l; 68 void *v; 69 register_t *retval; 70 { 71 struct freebsd_sys_ptrace_args /* { 72 syscallarg(int) req; 73 syscallarg(pid_t) pid; 74 syscallarg(caddr_t) addr; 75 syscallarg(int) data; 76 } */ *uap = v; 77 struct proc *p = l->l_proc; 78 int error; 79 caddr_t sg; 80 struct { 81 struct reg regs; 82 struct fpreg fpregs; 83 } *nrp; 84 struct sys_ptrace_args npa; 85 struct freebsd_ptrace_reg fr; 86 87 switch (SCARG(uap, req)) { 88 #ifdef PT_STEP 89 case FREEBSD_PT_STEP: 90 SCARG(&npa, req) = PT_STEP; 91 SCARG(&npa, pid) = SCARG(uap, pid); 92 SCARG(&npa, addr) = SCARG(uap, addr); 93 SCARG(&npa, data) = SCARG(uap, data); 94 return sys_ptrace(l, &npa, retval); 95 #endif 96 case FREEBSD_PT_TRACE_ME: 97 case FREEBSD_PT_READ_I: 98 case FREEBSD_PT_READ_D: 99 case FREEBSD_PT_WRITE_I: 100 case FREEBSD_PT_WRITE_D: 101 case FREEBSD_PT_CONTINUE: 102 case FREEBSD_PT_KILL: 103 /* These requests are compatible with NetBSD */ 104 return sys_ptrace(l, uap, retval); 105 106 case FREEBSD_PT_READ_U: 107 case FREEBSD_PT_WRITE_U: 108 sg = stackgap_init(p->p_emul); 109 nrp = stackgap_alloc(&sg, sizeof(*nrp)); 110 #ifdef PT_GETREGS 111 SCARG(&npa, req) = PT_GETREGS; 112 SCARG(&npa, pid) = SCARG(uap, pid); 113 SCARG(&npa, addr) = (caddr_t)&nrp->regs; 114 if ((error = sys_ptrace(l, &npa, retval)) != 0) 115 return error; 116 #endif 117 #ifdef PT_GETFPREGS 118 SCARG(&npa, req) = PT_GETFPREGS; 119 SCARG(&npa, pid) = SCARG(uap, pid); 120 SCARG(&npa, addr) = (caddr_t)&nrp->fpregs; 121 if ((error = sys_ptrace(l, &npa, retval)) != 0) 122 return error; 123 #endif 124 netbsd_to_freebsd_ptrace_regs(&nrp->regs, &nrp->fpregs, &fr); 125 switch (SCARG(uap, req)) { 126 case FREEBSD_PT_READ_U: 127 return freebsd_ptrace_getregs(&fr, SCARG(uap, addr), 128 retval); 129 130 case FREEBSD_PT_WRITE_U: 131 error = freebsd_ptrace_setregs(&fr, 132 SCARG(uap, addr), SCARG(uap, data)); 133 if (error) 134 return error; 135 freebsd_to_netbsd_ptrace_regs(&fr, 136 &nrp->regs, &nrp->fpregs); 137 #ifdef PT_SETREGS 138 SCARG(&npa, req) = PT_SETREGS; 139 SCARG(&npa, pid) = SCARG(uap, pid); 140 SCARG(&npa, addr) = (caddr_t)&nrp->regs; 141 if ((error = sys_ptrace(l, &npa, retval)) != 0) 142 return error; 143 #endif 144 #ifdef PT_SETFPREGS 145 SCARG(&npa, req) = PT_SETFPREGS; 146 SCARG(&npa, pid) = SCARG(uap, pid); 147 SCARG(&npa, addr) = (caddr_t)&nrp->fpregs; 148 if ((error = sys_ptrace(l, &npa, retval)) != 0) 149 return error; 150 #endif 151 return 0; 152 } 153 154 default: /* It was not a legal request. */ 155 return (EINVAL); 156 } 157 158 #ifdef DIAGNOSTIC 159 panic("freebsd_ptrace: impossible"); 160 #endif 161 } 162
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