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/* Target operations for the remote server for GDB.

   Copyright 2002

   Free Software Foundation, Inc.

   Contributed by MontaVista Software.

   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 2 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, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#ifndef TARGET_H

#define TARGET_H

struct target_ops

{

  /* Start a new process.

     PROGRAM is a path to the program to execute.

     ARGS is a standard NULL-terminated array of arguments,

     to be passed to the inferior as ``argv''.

     Returns the new PID on success, -1 on failure.  Registers the new

     process with the process list.  */

  int (*create_inferior) (char *program, char **args);

  /* Attach to a running process.

     PID is the process ID to attach to, specified by the user

     or a higher layer.  */

  int (*attach) (int pid);

  /* Kill all inferiors.  */

  void (*kill) (void);

  /* Return 1 iff the thread with process ID PID is alive.  */

  int (*thread_alive) (int pid);

  /* Resume the inferior process.

     If STEP is non-zero, we want to single-step.

     If SIGNAL is nonzero, send the process that signal as we resume it.

   */

  void (*resume) (int step, int signo);

  /* Wait for the inferior process to change state.

     STATUSP will be filled in with a response code to send to GDB.

     Returns the signal which caused the process to stop.  */

  unsigned char (*wait) (char *status);

  /* Fetch registers from the inferior process.

     If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */

  void (*fetch_registers) (int regno);

  /* Store registers to the inferior process.

     If REGNO is -1, store all registers; otherwise, store at least REGNO.  */

  void (*store_registers) (int regno);

  /* Read memory from the inferior process.  This should generally be

     called through read_inferior_memory, which handles breakpoint shadowing.

     Read LEN bytes at MEMADDR into a buffer at MYADDR.  */

  void (*read_memory) (CORE_ADDR memaddr, char *myaddr, int len);

  /* Write memory to the inferior process.  This should generally be

     called through write_inferior_memory, which handles breakpoint shadowing.

     Write LEN bytes from the buffer at MYADDR to MEMADDR.

     Returns 0 on success and errno on failure.  */

  int (*write_memory) (CORE_ADDR memaddr, const char *myaddr, int len);

  /* Query GDB for the values of any symbols we're interested in.

     This function is called whenever we receive a "qSymbols::"

     query, which corresponds to every time more symbols (might)

     become available.  NULL if we aren't interested in any

     symbols.  */

  void (*look_up_symbols) (void);

};

extern struct target_ops *the_target;

void set_target_ops (struct target_ops *);

#define create_inferior(program, args) \

  (*the_target->create_inferior) (program, args)

#define myattach(pid) \

  (*the_target->attach) (pid)

#define kill_inferior() \

  (*the_target->kill) ()

#define mythread_alive(pid) \

  (*the_target->thread_alive) (pid)

#define myresume(step,signo) \

  (*the_target->resume) (step, signo)

#define fetch_inferior_registers(regno) \

  (*the_target->fetch_registers) (regno)

#define store_inferior_registers(regno) \

  (*the_target->store_registers) (regno)

unsigned char mywait (char *statusp, int connected_wait);

void read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len);

int write_inferior_memory (CORE_ADDR memaddr, const char *myaddr, int len);

void set_desired_inferior (int id);

#endif /* TARGET_H */