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/* GNU/Linux/m32r specific low level interface, for the remote server for GDB.

   Copyright (C) 2005, 2007, 2008 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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "server.h"

#include "linux-low.h"

#ifdef HAVE_SYS_REG_H

#include <sys/reg.h>

#endif

#define m32r_num_regs 25

static int m32r_regmap[] = {

#ifdef PT_R0

  PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,

  PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,

  PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB

#else

  4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,

  4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,

  4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32

#endif

};

static int

m32r_cannot_store_register (int regno)

{

  return (regno >= m32r_num_regs);

}

static int

m32r_cannot_fetch_register (int regno)

{

  return (regno >= m32r_num_regs);

}

static CORE_ADDR

m32r_get_pc ()

{

  unsigned long pc;

  collect_register_by_name ("pc", &pc);

  return pc;

}

static void

m32r_set_pc (CORE_ADDR pc)

{

  unsigned long newpc = pc;

  supply_register_by_name ("pc", &newpc);

}

static const unsigned short m32r_breakpoint = 0x10f1;

#define m32r_breakpoint_len 2

static int

m32r_breakpoint_at (CORE_ADDR where)

{

  unsigned short insn;

  (*the_target->read_memory) (where, (unsigned char *) &insn,

                              m32r_breakpoint_len);

  if (insn == m32r_breakpoint)

    return 1;

  /* If necessary, recognize more trap instructions here.  GDB only uses the

     one.  */

  return 0;

}

struct linux_target_ops the_low_target = {

  m32r_num_regs,

  m32r_regmap,

  m32r_cannot_fetch_register,

  m32r_cannot_store_register,

  m32r_get_pc,

  m32r_set_pc,

  (const unsigned char *) &m32r_breakpoint,

  m32r_breakpoint_len,

  NULL,

  0,

  m32r_breakpoint_at,

};