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/* Portable <sys/ptrace.h>
Copyright (C) 2004-2017 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
# ifdef HAVE_PTRACE64
# define ptrace(request, pid, addr, data) \
ptrace64 (request, pid, addr, data, 0)
# undef PTRACE_TYPE_ARG3
# define PTRACE_TYPE_ARG3 long long
# else
# define ptrace(request, pid, addr, data) \
ptrace (request, pid, addr, data, 0)
# endif
#else
/* Wrapper that avoids adding a pointless cast to all callers. */
# define ptrace(request, pid, addr, data) \
ptrace ((PTRACE_TYPE_ARG1) request, pid, addr, data)
#endif
#endif /* gdb_ptrace.h */
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