/* `ptrace' debugger support interface.  Linux version.
Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#ifndef _SYS_PTRACE_H
#define _SYS_PTRACE_H

#include <features.h>

__BEGIN_DECLS

/* Type of the REQUEST argument to `ptrace.'  */
enum __ptrace_request
{
  /* Indicate that the process making this request should be traced.
     All signals received by this process can be intercepted by its
     parent, and its parent can use the other `ptrace' requests.  */
  PTRACE_TRACEME = 0,
#define PT_TRACE_ME PTRACE_TRACEME

  /* Return the word in the process's text space at address ADDR.  */
  PTRACE_PEEKTEXT,
#define PT_READ_I PTRACE_PEEKTEXT

  /* Return the word in the process's data space at address ADDR.  */
  PTRACE_PEEKDATA,
#define PT_READ_D PTRACE_PEEKDATA

  /* Return the word in the process's user area at offset ADDR.  */
  PTRACE_PEEKUSER,
#define PT_READ_U PTRACE_PEEKUSER

  /* Write the word DATA into the process's text space at address ADDR.  */
  PTRACE_POKETEXT,
#define PT_WRITE_I PTRACE_POKETEXT

  /* Write the word DATA into the process's data space at address ADDR.  */
  PTRACE_POKEDATA,
#define PT_WRITE_D PTRACE_POKEDATA

  /* Write the word DATA into the process's user area at offset ADDR.  */
  PTRACE_POKEUSER,
#define PT_WRITE_U PTRACE_POKEUSER

  /* Continue the process.  */
  PTRACE_CONT,
#define PT_CONTINUE PTRACE_CONT

  /* Kill the process.  */
  PTRACE_KILL,
#define PT_KILL PTRACE_KILL

  /* Single step the process.
     This is not supported on all machines.  */
  PTRACE_SINGLESTEP,
#define PT_STEP PTRACE_SINGLESTEP

  /* Attach to a process that is already running. */
  PTRACE_ATTACH = 0x10,
#define PT_ATTACH PTRACE_ATTACH

  /* Detach from a process attached to with PTRACE_ATTACH.  */
  PTRACE_DETACH,
#define PT_DETACH PTRACE_DETACH

  /* Continue and stop at the next (return from) syscall.  */
  PTRACE_SYSCALL = 24,
};

/* Perform process tracing functions.  REQUEST is one of the values
   above, and determines the action to be taken.
   For all requests except PTRACE_TRACEME, PID specifies the process to be
   traced.

   PID and the other arguments described above for the various requests should
   appear (those that are used for the particular request) as:
     pid_t PID, void *ADDR, int DATA, void *ADDR2
   after REQUEST.  */
extern int ptrace __P ((enum __ptrace_request __request __DOTS));

__END_DECLS

#endif /* sys/ptrace.h */
