tm-m68kv4.h

gdb是linux下的一个远程调试环境.能让你很方便地调试linux下的代码.

/* Target definitions for GDB on a Motorola 680x0 running SVR4.
   (Commodore Amiga with amix or Atari TT with ASV)
   Copyright 1991, 1994, 1995, 1996, 1998, 1999, 2000
   Free Software Foundation, Inc.
   Written by Fred Fish at Cygnus Support (fnf@cygint)

   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.  */

/* Define BPT_VECTOR if it is different than the default.
   This is the vector number used by traps to indicate a breakpoint. */

#define BPT_VECTOR 0x1

/* How much to decrement the PC after a trap.  Depends on kernel. */

#define DECR_PC_AFTER_BREAK 0	/* No decrement required */

/* Use the alternate method of determining valid frame chains. */

#define FRAME_CHAIN_VALID(fp,fi) func_frame_chain_valid (fp, fi)

#include "tm-sysv4.h"
#include "m68k/tm-m68k.h"

/* Offsets (in target ints) into jmp_buf.  Not defined in any system header
   file, so we have to step through setjmp/longjmp with a debugger and figure
   them out.  As a double check, note that <setjmp> defines _JBLEN as 13,
   which matches the number of elements we see saved by setjmp(). */

#define JB_ELEMENT_SIZE sizeof(int)	/* jmp_buf[_JBLEN] is array of ints */

#define JB_D2	0
#define JB_D3	1
#define JB_D4	2
#define JB_D5	3
#define JB_D6	4
#define JB_D7	5
#define JB_A1	6
#define JB_A2	7
#define JB_A3	8
#define JB_A4	9
#define JB_A5	10
#define JB_A6	11
#define JB_A7	12

#define JB_PC	JB_A1		/* Setjmp()'s return PC saved in A1 */

/* Figure out where the longjmp will land.  Slurp the args out of the stack.
   We expect the first arg to be a pointer to the jmp_buf structure from which
   we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
   This routine returns true on success */

#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)

/* Convert a DWARF register number to a gdb REGNUM.  */
#define DWARF_REG_TO_REGNUM(num) ((num) < 16 ? (num) : (num)+FP0_REGNUM-16)