1/* Portable <sys/ptrace.h>
2
3   Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
4
5   This file is part of GDB.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#ifndef GDB_PTRACE_H
21#define GDB_PTRACE_H
22
23/* The <sys/ptrace.h> header was introduced with 4.4BSD, and provided
24   the PT_* symbolic constants for the ptrace(2) request numbers.  The
25   ptrace(2) prototype was added later to the same header on BSD.
26   SunOS and GNU/Linux have slightly different symbolic names for the
27   constants that start with PTRACE_*.  System V still doesn't have
28   (and probably never will have) a <sys/ptrace.h> with symbolic
29   constants; the ptrace(2) prototype can be found in <unistd.h>.
30   Fortunately all systems use the same numerical constants for the
31   common ptrace requests.  */
32
33#ifdef HAVE_PTRACE_H
34# include <ptrace.h>
35#elif defined(HAVE_SYS_PTRACE_H)
36# include <sys/ptrace.h>
37#endif
38
39/* No need to include <unistd.h> since it's already included by
40   "defs.h".  */
41
42#ifndef PT_TRACE_ME
43# define PT_TRACE_ME	0
44#endif
45
46#ifndef PT_READ_I
47# define PT_READ_I	1	/* Read word in child's I space.  */
48#endif
49
50#ifndef PT_READ_D
51# define PT_READ_D	2	/* Read word in child's D space.  */
52#endif
53
54#ifndef PT_READ_U
55# define PT_READ_U	3	/* Read word in child's U space.  */
56#endif
57
58#ifndef PT_WRITE_I
59# define PT_WRITE_I	4	/* Write word in child's I space.  */
60#endif
61
62#ifndef PT_WRITE_D
63# define PT_WRITE_D	5	/* Write word in child's D space.  */
64#endif
65
66#ifndef PT_WRITE_U
67# define PT_WRITE_U	6	/* Write word in child's U space.  */
68#endif
69
70/* HP-UX doesn't define PT_CONTINUE and PT_STEP.  Instead of those two
71   ptrace requests, it has PT_CONTIN, PT_CONTIN1, PT_SINGLE and
72   PT_SINGLE1.  PT_CONTIN1 and PT_SINGLE1 preserve pending signals,
73   which apparently is what is wanted by the HP-UX native code.  */
74
75#ifndef PT_CONTINUE
76# ifdef PT_CONTIN1
77#  define PT_CONTINUE	PT_CONTIN1
78# else
79#  define PT_CONTINUE	7	/* Continue the child.  */
80# endif
81#endif
82
83#ifndef PT_KILL
84# define PT_KILL	8	/* Kill the child process.  */
85#endif
86
87#ifndef PT_STEP
88# ifdef PT_SINGLE1
89#  define PT_STEP	PT_SINGLE1
90# else
91#  define PT_STEP	9	/* Single step the child.   */
92# endif
93#endif
94
95/* Not all systems support attaching and detaching.   */
96
97#ifndef PT_ATTACH
98# ifdef PTRACE_ATTACH
99#  define PT_ATTACH PTRACE_ATTACH
100# endif
101#endif
102
103#ifndef PT_DETACH
104# ifdef PTRACE_DETACH
105#  define PT_DETACH PTRACE_DETACH
106# endif
107#endif
108
109/* Some systems, in particular DEC OSF/1, Digital Unix, Compaq Tru64
110   or whatever it's called these days, don't provide a prototype for
111   ptrace.  Provide one to silence compiler warnings.  */
112
113#ifndef HAVE_DECL_PTRACE
114extern PTRACE_TYPE_RET ptrace();
115#endif
116
117/* Some systems, at least AIX and HP-UX have a ptrace with five
118   arguments.  Since we never use the fifth argument, define a ptrace
119   macro that calls the real ptrace with the last argument set to
120   zero.  */
121
122#ifdef PTRACE_TYPE_ARG5
123# define ptrace(request, pid, addr, data) ptrace (request, pid, addr, data, 0)
124#endif
125
126#endif /* gdb_ptrace.h */
127