[deliverable/binutils-gdb.git] / gdb / gdbserver / linux-m32r-low.c

/* 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,
};
Commit	Line	Data
7cfbc4a0	1	/* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
9b254dd1	2	Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc.
7cfbc4a0 KI	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
a9762ec7	8	the Free Software Foundation; either version 3 of the License, or
7cfbc4a0 KI	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
a9762ec7	17	along with this program. If not, see <http://www.gnu.org/licenses/>. */
7cfbc4a0 KI	18
	19	#include "server.h"
	20	#include "linux-low.h"
	21
	22	#ifdef HAVE_SYS_REG_H
	23	#include <sys/reg.h>
	24	#endif
	25
	26	#define m32r_num_regs 25
	27
	28	static int m32r_regmap[] = {
	29	#ifdef PT_R0
	30	PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
	31	PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
	32	PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
	33	#else
	34	4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
	35	4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
	36	4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
	37	#endif
	38	};
	39
	40	static int
	41	m32r_cannot_store_register (int regno)
	42	{
	43	return (regno >= m32r_num_regs);
	44	}
	45
	46	static int
	47	m32r_cannot_fetch_register (int regno)
	48	{
	49	return (regno >= m32r_num_regs);
	50	}
	51
	52	static CORE_ADDR
	53	m32r_get_pc ()
	54	{
	55	unsigned long pc;
	56	collect_register_by_name ("pc", &pc);
	57	return pc;
	58	}
	59
	60	static void
	61	m32r_set_pc (CORE_ADDR pc)
	62	{
	63	unsigned long newpc = pc;
	64	supply_register_by_name ("pc", &newpc);
	65	}
	66
	67	static const unsigned short m32r_breakpoint = 0x10f1;
	68	#define m32r_breakpoint_len 2
	69
	70	static int
	71	m32r_breakpoint_at (CORE_ADDR where)
	72	{
	73	unsigned short insn;
	74
f450004a DJ	75	(the_target->read_memory) (where, (unsigned char ) &insn,
f450004a DJ	76	m32r_breakpoint_len);
7cfbc4a0 KI	77	if (insn == m32r_breakpoint)
	78	return 1;
	79
	80	/* If necessary, recognize more trap instructions here. GDB only uses the
	81	one. */
	82	return 0;
	83	}
	84
	85	struct linux_target_ops the_low_target = {
	86	m32r_num_regs,
	87	m32r_regmap,
	88	m32r_cannot_fetch_register,
	89	m32r_cannot_store_register,
	90	m32r_get_pc,
	91	m32r_set_pc,
f450004a	92	(const unsigned char *) &m32r_breakpoint,
7cfbc4a0 KI	93	m32r_breakpoint_len,
	94	NULL,
	95	0,
	96	m32r_breakpoint_at,
	97	};