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/* Portable <sys/ptrace.h>

   Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef GDB_PTRACE_H

#define GDB_PTRACE_H

/* The <sys/ptrace.h> header was introduced with 4.4BSD, and provided

   the PT_* symbolic constants for the ptrace(2) request numbers.  The

   ptrace(2) prototype was added later to the same header on BSD.

   SunOS and GNU/Linux have slightly different symbolic names for the

   constants that start with PTRACE_*.  System V still doesn't have

   (and probably never will have) a <sys/ptrace.h> with symbolic

   constants; the ptrace(2) prototype can be found in <unistd.h>.

   Fortunately all systems use the same numerical constants for the

   common ptrace requests.  */

#ifdef HAVE_PTRACE_H

# include <ptrace.h>

#elif defined(HAVE_SYS_PTRACE_H)

# include <sys/ptrace.h>

#endif

/* No need to include <unistd.h> since it's already included by

   "defs.h".  */

#ifndef PT_TRACE_ME

# define PT_TRACE_ME    0

#endif

#ifndef PT_READ_I

# define PT_READ_I      1       /* Read word in child's I space.  */

#endif

#ifndef PT_READ_D

# define PT_READ_D      2       /* Read word in child's D space.  */

#endif

#ifndef PT_READ_U

# define PT_READ_U      3       /* Read word in child's U space.  */

#endif

#ifndef PT_WRITE_I

# define PT_WRITE_I     4       /* Write word in child's I space.  */

#endif

#ifndef PT_WRITE_D

# define PT_WRITE_D     5       /* Write word in child's D space.  */

#endif

#ifndef PT_WRITE_U

# define PT_WRITE_U     6       /* Write word in child's U space.  */

#endif

/* HP-UX doesn't define PT_CONTINUE and PT_STEP.  Instead of those two

   ptrace requests, it has PT_CONTIN, PT_CONTIN1, PT_SINGLE and

   PT_SINGLE1.  PT_CONTIN1 and PT_SINGLE1 preserve pending signals,

   which apparently is what is wanted by the HP-UX native code.  */

#ifndef PT_CONTINUE

# ifdef PT_CONTIN1

#  define PT_CONTINUE   PT_CONTIN1

# else

#  define PT_CONTINUE   7       /* Continue the child.  */

# endif

#endif

#ifndef PT_KILL

# define PT_KILL        8       /* Kill the child process.  */

#endif

#ifndef PT_STEP

# ifdef PT_SINGLE1

#  define PT_STEP       PT_SINGLE1

# else

#  define PT_STEP       9       /* Single step the child.   */

# endif

#endif

/* Not all systems support attaching and detaching.   */

#ifndef PT_ATTACH

# ifdef PTRACE_ATTACH

#  define PT_ATTACH PTRACE_ATTACH

# endif

#endif

#ifndef PT_DETACH

# ifdef PTRACE_DETACH

#  define PT_DETACH PTRACE_DETACH

# endif

#endif

/* For systems such as HP/UX that do not provide PT_SYSCALL, define it

   here as an alias for PT_CONTINUE.  This is what the PT_SYSCALL

   request is expected to do, in addition to stopping when entering/

   exiting a system call.  Chances are, if the system supports system

   call tracing, enabling this feature is probably done separately;

   and there is probably no special request that we would be required

   to use when resuming the execution of our program.  */

#ifndef PT_SYSCALL

# ifdef PTRACE_SYSCALL

#  define PT_SYSCALL PTRACE_SYSCALL

#else

#  define PT_SYSCALL PT_CONTINUE

# endif

#endif

/* Some systems, in particular DEC OSF/1, Digital Unix, Compaq Tru64

   or whatever it's called these days, don't provide a prototype for

   ptrace.  Provide one to silence compiler warnings.  */

#ifndef HAVE_DECL_PTRACE

extern PTRACE_TYPE_RET ptrace();

#endif

/* Some systems, at least AIX and HP-UX have a ptrace with five

   arguments.  Since we never use the fifth argument, define a ptrace

   macro that calls the real ptrace with the last argument set to

   zero.  */

#ifdef PTRACE_TYPE_ARG5

# define ptrace(request, pid, addr, data) ptrace (request, pid, addr, data, 0)

#endif

#endif /* gdb_ptrace.h */