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/* Macro definitions for i386, Unix System V.

   Copyright 1986, 1987, 1989, 1991, 1992, 1993 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 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 TM_I386V_H

#define TM_I386V_H 1

/* First pick up the generic *86 target file. */

#include "i386/tm-i386.h"

/* Number of traps that happen between exec'ing the shell to run an

   inferior, and when we finally get to the inferior code.  This is

   2 on most implementations.  Override here to 4. */

#undef  START_INFERIOR_TRAPS_EXPECTED

#define START_INFERIOR_TRAPS_EXPECTED 4

#undef  STORE_STRUCT_RETURN

#define STORE_STRUCT_RETURN(ADDR, SP) \

  { char buf[REGISTER_SIZE];    \

    (SP) -= sizeof (ADDR);      \

    store_address (buf, sizeof (ADDR), ADDR);   \

    write_memory ((SP), buf, sizeof (ADDR)); }

/* Extract from an array REGBUF containing the (raw) register state

   a function return value of type TYPE, and copy that, in virtual format,

   into VALBUF.  */

#undef  EXTRACT_RETURN_VALUE

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \

  memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))

/* Write into appropriate registers a function return value

   of type TYPE, given in virtual format.  */

#undef  STORE_RETURN_VALUE

#define STORE_RETURN_VALUE(TYPE,VALBUF) \

  write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))

/* Describe the pointer in each stack frame to the previous stack frame

   (its caller).  */

/* FRAME_CHAIN takes a frame's nominal address

   and produces the frame's chain-pointer. */

#undef  FRAME_CHAIN

#define FRAME_CHAIN(thisframe) \

  (!inside_entry_file ((thisframe)->pc) ? \

   read_memory_integer ((thisframe)->frame, 4) :\

   0)

/* Define other aspects of the stack frame.  */

/* A macro that tells us whether the function invocation represented

   by FI does not have a frame on the stack associated with it.  If it

   does not, FRAMELESS is set to 1, else 0.  */

#undef  FRAMELESS_FUNCTION_INVOCATION

#define FRAMELESS_FUNCTION_INVOCATION(FI) \

  (frameless_look_for_prologue (FI))

#undef  FRAME_SAVED_PC

#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))

/* Return number of args passed to a frame.

   Can return -1, meaning no way to tell.  */

#undef  FRAME_NUM_ARGS

#define FRAME_NUM_ARGS(fi) (-1)

/* Forward decl's for prototypes */

struct frame_info;

struct frame_saved_regs;

extern int

i386_frame_num_args PARAMS ((struct frame_info *));

#endif /* ifndef TM_I386V_H */