Annotation of sys/compat/freebsd/freebsd_ptrace.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: freebsd_ptrace.c,v 1.6 2003/06/02 23:28:00 millert Exp $ */
2: /* $NetBSD: freebsd_ptrace.c,v 1.2 1996/05/03 17:03:12 christos Exp $ */
3:
4: /*-
5: * Copyright (c) 1994 Christopher G. Demetriou. All rights reserved.
6: * Copyright (c) 1982, 1986, 1989, 1993
7: * The Regents of the University of California. All rights reserved.
8: * (c) UNIX System Laboratories, Inc.
9: * All or some portions of this file are derived from material licensed
10: * to the University of California by American Telephone and Telegraph
11: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
12: * the permission of UNIX System Laboratories, Inc.
13: *
14: * Redistribution and use in source and binary forms, with or without
15: * modification, are permitted provided that the following conditions
16: * are met:
17: * 1. Redistributions of source code must retain the above copyright
18: * notice, this list of conditions and the following disclaimer.
19: * 2. Redistributions in binary form must reproduce the above copyright
20: * notice, this list of conditions and the following disclaimer in the
21: * documentation and/or other materials provided with the distribution.
22: * 3. Neither the name of the University nor the names of its contributors
23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: *
38: * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
39: */
40:
41: #include <sys/param.h>
42: #include <sys/systm.h>
43: #include <sys/proc.h>
44: #include <sys/errno.h>
45: #include <sys/ptrace.h>
46: #include <sys/uio.h>
47: #include <sys/user.h>
48: #include <sys/mount.h>
49: #include <sys/syscallargs.h>
50:
51: #include <machine/reg.h>
52: #include <machine/freebsd_machdep.h>
53:
54: #include <compat/freebsd/freebsd_signal.h>
55: #include <compat/freebsd/freebsd_syscallargs.h>
56: #include <compat/freebsd/freebsd_util.h>
57: #include <compat/freebsd/freebsd_ptrace.h>
58:
59: /*
60: * Process debugging system call.
61: */
62: int
63: freebsd_sys_ptrace(p, v, retval)
64: struct proc *p;
65: void *v;
66: register_t *retval;
67: {
68: struct freebsd_sys_ptrace_args /* {
69: syscallarg(int) req;
70: syscallarg(pid_t) pid;
71: syscallarg(caddr_t) addr;
72: syscallarg(int) data;
73: } */ *uap = v;
74: int error;
75: caddr_t sg;
76: struct {
77: struct reg regs;
78: struct fpreg fpregs;
79: } *nrp;
80: struct sys_ptrace_args npa;
81: struct freebsd_ptrace_reg fr;
82:
83: switch (SCARG(uap, req)) {
84: #ifdef PT_STEP
85: case FREEBSD_PT_STEP:
86: SCARG(&npa, req) = PT_STEP;
87: SCARG(&npa, pid) = SCARG(uap, pid);
88: SCARG(&npa, addr) = SCARG(uap, addr);
89: SCARG(&npa, data) = SCARG(uap, data);
90: return sys_ptrace(p, &npa, retval);
91: #endif
92: case FREEBSD_PT_TRACE_ME:
93: case FREEBSD_PT_READ_I:
94: case FREEBSD_PT_READ_D:
95: case FREEBSD_PT_WRITE_I:
96: case FREEBSD_PT_WRITE_D:
97: case FREEBSD_PT_CONTINUE:
98: case FREEBSD_PT_KILL:
99: /* These requests are compatible with NetBSD */
100: return sys_ptrace(p, uap, retval);
101:
102: case FREEBSD_PT_READ_U:
103: case FREEBSD_PT_WRITE_U:
104: sg = stackgap_init(p->p_emul);
105: nrp = stackgap_alloc(&sg, sizeof(*nrp));
106: SCARG(&npa, req) = PT_GETREGS;
107: SCARG(&npa, pid) = SCARG(uap, pid);
108: SCARG(&npa, addr) = (caddr_t)&nrp->regs;
109: if ((error = sys_ptrace(p, &npa, retval)) != 0)
110: return error;
111: #ifdef PT_GETFPREGS
112: SCARG(&npa, req) = PT_GETFPREGS;
113: SCARG(&npa, pid) = SCARG(uap, pid);
114: SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
115: if ((error = sys_ptrace(p, &npa, retval)) != 0)
116: return error;
117: #endif
118: netbsd_to_freebsd_ptrace_regs(&nrp->regs, &nrp->fpregs, &fr);
119: switch (SCARG(uap, req)) {
120: case FREEBSD_PT_READ_U:
121: return freebsd_ptrace_getregs(&fr, SCARG(uap, addr),
122: retval);
123:
124: case FREEBSD_PT_WRITE_U:
125: error = freebsd_ptrace_setregs(&fr,
126: SCARG(uap, addr), SCARG(uap, data));
127: if (error)
128: return error;
129: freebsd_to_netbsd_ptrace_regs(&fr,
130: &nrp->regs, &nrp->fpregs);
131: SCARG(&npa, req) = PT_SETREGS;
132: SCARG(&npa, pid) = SCARG(uap, pid);
133: SCARG(&npa, addr) = (caddr_t)&nrp->regs;
134: if ((error = sys_ptrace(p, &npa, retval)) != 0)
135: return error;
136: #ifdef PT_SETFPREGS
137: SCARG(&npa, req) = PT_SETFPREGS;
138: SCARG(&npa, pid) = SCARG(uap, pid);
139: SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
140: if ((error = sys_ptrace(p, &npa, retval)) != 0)
141: return error;
142: #endif
143: return 0;
144: }
145:
146: default: /* It was not a legal request. */
147: return (EINVAL);
148: }
149:
150: #ifdef DIAGNOSTIC
151: panic("freebsd_ptrace: impossible");
152: #endif
153: }
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