tm-nindy960.h

早期freebsd实现

/* Parameters for Intel 960 running NINDY monitor, for GDB, the GNU debugger.
   Copyright (C) 1990-1991 Free Software Foundation, Inc.
   Contributed by Intel Corporation and Cygnus Support.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/*****************************************************************************
 * Definitions to target GDB to an i960 debugged over a serial line.
 ******************************************************************************/

#include "tm-i960.h"

/* Override the standard gdb prompt when compiled for this target.  */

#define	DEFAULT_PROMPT	"(gdb960) "

/* Additional command line options accepted by nindy gdb's, for handling
   the remote-nindy.c interface.  These should really be target-specific
   rather than architecture-specific.  */

extern int nindy_old_protocol;	/* nonzero if old NINDY serial protocol */
extern int nindy_initial_brk;	/* Send a BREAK to reset board first */
extern char *nindy_ttyname;	/* Name of serial port to talk to nindy */

#define	ADDITIONAL_OPTIONS \
	{"O", no_argument, &nindy_old_protocol, 1},	\
	{"brk", no_argument, &nindy_initial_brk, 1},	\
	{"ser", required_argument, 0, 1004},  /* 1004 is magic cookie for ADDL_CASES */

#define	ADDITIONAL_OPTION_CASES	\
	case 1004:	/* -ser option:  remote nindy auto-start */	\
	  nindy_ttyname = optarg;	\
	  break;

#define	ADDITIONAL_OPTION_HELP \
	"\
  -O                Use old protocol to talk to a Nindy target\n\
  -brk              Send a break to a Nindy target to reset it.\n\
  -ser SERIAL       Open remote Nindy session to SERIAL port.\n\
"

/* If specified on the command line, open tty for talking to nindy,
   and download the executable file if one was specified.  */

#define	ADDITIONAL_OPTION_HANDLER	\
	if (!setjmp (to_top_level) && nindy_ttyname) {		\
	  nindy_open (nindy_ttyname, !batch);			\
	  if ( !setjmp(to_top_level) && execarg ) {		\
		target_load (execarg, !batch);			\
	  }							\
	}

/* If configured for i960 target, we take control before main loop
   and demand that we configure for a nindy target.  */

#define	BEFORE_MAIN_LOOP_HOOK	\
  nindy_before_main_loop();

/* Address of end of stack space.
 *	This probably doesn't matter for nindy, because it's only used
 *	in manipulation of core files, which we don't support.
 */

#define STACK_END_ADDR (0xfe000000)

/* FRAME_CHAIN_VALID returns zero if the given frame is the outermost one
   and has no caller.

   On the i960, each various target system type defines FRAME_CHAIN_VALID,
   since it differs between NINDY and VxWorks, the two currently supported
   targets types.  */

#define	FRAME_CHAIN_VALID(chain, thisframe) \
	nindy_frame_chain_valid (chain, thisframe)

extern int nindy_frame_chain_valid();		/* See nindy-tdep.c */

/* Sequence of bytes for breakpoint instruction */

#define BREAKPOINT {0x00, 0x3e, 0x00, 0x66}

/* Amount ip must be decremented by after a breakpoint.
 * This is often the number of bytes in BREAKPOINT but not always.
 */

#define DECR_PC_AFTER_BREAK 0