gdb/gdb_ptrace.h

   1 /* Portable <sys/ptrace.h>
   2
   3    Copyright (C) 2004-2013 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 /* For systems such as HP/UX that do not provide PT_SYSCALL, define it
 110    here as an alias for PT_CONTINUE.  This is what the PT_SYSCALL
 111    request is expected to do, in addition to stopping when entering/
 112    exiting a system call.  Chances are, if the system supports system
 113    call tracing, enabling this feature is probably done separately;
 114    and there is probably no special request that we would be required
 115    to use when resuming the execution of our program.  */
 116 #ifndef PT_SYSCALL
 117 # ifdef PTRACE_SYSCALL
 118 #  define PT_SYSCALL PTRACE_SYSCALL
 119 #else
 120 #  define PT_SYSCALL PT_CONTINUE
 121 # endif
 122 #endif
 123
 124 /* Some systems, in particular DEC OSF/1, Digital Unix, Compaq Tru64
 125    or whatever it's called these days, don't provide a prototype for
 126    ptrace.  Provide one to silence compiler warnings.  */
 127
 128 #ifndef HAVE_DECL_PTRACE
 129 extern PTRACE_TYPE_RET ptrace();
 130 #endif
 131
 132 /* Some systems, at least AIX and HP-UX have a ptrace with five
 133    arguments.  Since we never use the fifth argument, define a ptrace
 134    macro that calls the real ptrace with the last argument set to
 135    zero.  */
 136
 137 #ifdef PTRACE_TYPE_ARG5
 138 # ifdef HAVE_PTRACE64
 139 #  define ptrace(request, pid, addr, data) \
 140           ptrace64 (request, pid, addr, data, 0)
 141 #  undef PTRACE_TYPE_ARG3
 142 #  define PTRACE_TYPE_ARG3 long long
 143 # else
 144 #  define ptrace(request, pid, addr, data) \
 145           ptrace (request, pid, addr, data, 0)
 146 # endif
 147 #endif
 148
 149 #endif /* gdb_ptrace.h */