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

/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
   Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 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"

/* Defined in auto-generated file reg-sh.c.  */
void init_registers_sh (void);

#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif

#include <asm/ptrace.h>

#define sh_num_regs 41

/* Currently, don't check/send MQ.  */
static int sh_regmap[] = {
 0,	4,	8,	12,	16,	20,	24,	28,
 32,	36,	40,	44,	48,	52,	56,	60,

 REG_PC*4,   REG_PR*4,   REG_GBR*4,  -1,
 REG_MACH*4, REG_MACL*4, REG_SR*4,
 REG_FPUL*4, REG_FPSCR*4,

 REG_FPREG0*4+0,   REG_FPREG0*4+4,   REG_FPREG0*4+8,   REG_FPREG0*4+12,
 REG_FPREG0*4+16,  REG_FPREG0*4+20,  REG_FPREG0*4+24,  REG_FPREG0*4+28,
 REG_FPREG0*4+32,  REG_FPREG0*4+36,  REG_FPREG0*4+40,  REG_FPREG0*4+44,
 REG_FPREG0*4+48,  REG_FPREG0*4+52,  REG_FPREG0*4+56,  REG_FPREG0*4+60,
};

static int
sh_cannot_store_register (int regno)
{
  return 0;
}

static int
sh_cannot_fetch_register (int regno)
{
  return 0;
}

static CORE_ADDR
sh_get_pc ()
{
  unsigned long pc;
  collect_register_by_name ("pc", &pc);
  return pc;
}

static void
sh_set_pc (CORE_ADDR pc)
{
  unsigned long newpc = pc;
  supply_register_by_name ("pc", &newpc);
}

/* Correct in either endianness, obviously.  */
static const unsigned short sh_breakpoint = 0xc3c3;
#define sh_breakpoint_len 2

static int
sh_breakpoint_at (CORE_ADDR where)
{
  unsigned short insn;

  (*the_target->read_memory) (where, (unsigned char *) &insn, 2);
  if (insn == sh_breakpoint)
    return 1;

  /* If necessary, recognize more trap instructions here.  GDB only uses the
     one.  */
  return 0;
}

/* Provide only a fill function for the general register set.  ps_lgetregs
   will use this for NPTL support.  */

static void sh_fill_gregset (void *buf)
{
  int i;

  for (i = 0; i < 23; i++)
    if (sh_regmap[i] != -1)
      collect_register (i, (char *) buf + sh_regmap[i]);
}

struct regset_info target_regsets[] = {
  { 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
  { 0, 0, -1, -1, NULL, NULL }
};

struct linux_target_ops the_low_target = {
  init_registers_sh,
  sh_num_regs,
  sh_regmap,
  sh_cannot_fetch_register,
  sh_cannot_store_register,
  sh_get_pc,
  sh_set_pc,
  (const unsigned char *) &sh_breakpoint,
  sh_breakpoint_len,
  NULL,
  0,
  sh_breakpoint_at,
};
Commit	Line	Data
	1	/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
	2	Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007,
	3	2008 Free Software Foundation, Inc.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#include "server.h"
	21	#include "linux-low.h"
	22
	23	/* Defined in auto-generated file reg-sh.c. */
	24	void init_registers_sh (void);
	25
	26	#ifdef HAVE_SYS_REG_H
	27	#include <sys/reg.h>
	28	#endif
	29
	30	#include <asm/ptrace.h>
	31
	32	#define sh_num_regs 41
	33
	34	/* Currently, don't check/send MQ. */
	35	static int sh_regmap[] = {
	36	0, 4, 8, 12, 16, 20, 24, 28,
	37	32, 36, 40, 44, 48, 52, 56, 60,
	38
	39	REG_PC4, REG_PR4, REG_GBR*4, -1,
	40	REG_MACH4, REG_MACL4, REG_SR*4,
	41	REG_FPUL4, REG_FPSCR4,
	42
	43	REG_FPREG04+0, REG_FPREG04+4, REG_FPREG04+8, REG_FPREG04+12,
	44	REG_FPREG04+16, REG_FPREG04+20, REG_FPREG04+24, REG_FPREG04+28,
	45	REG_FPREG04+32, REG_FPREG04+36, REG_FPREG04+40, REG_FPREG04+44,
	46	REG_FPREG04+48, REG_FPREG04+52, REG_FPREG04+56, REG_FPREG04+60,
	47	};
	48
	49	static int
	50	sh_cannot_store_register (int regno)
	51	{
	52	return 0;
	53	}
	54
	55	static int
	56	sh_cannot_fetch_register (int regno)
	57	{
	58	return 0;
	59	}
	60
	61	static CORE_ADDR
	62	sh_get_pc ()
	63	{
	64	unsigned long pc;
	65	collect_register_by_name ("pc", &pc);
	66	return pc;
	67	}
	68
	69	static void
	70	sh_set_pc (CORE_ADDR pc)
	71	{
	72	unsigned long newpc = pc;
	73	supply_register_by_name ("pc", &newpc);
	74	}
	75
	76	/* Correct in either endianness, obviously. */
	77	static const unsigned short sh_breakpoint = 0xc3c3;
	78	#define sh_breakpoint_len 2
	79
	80	static int
	81	sh_breakpoint_at (CORE_ADDR where)
	82	{
	83	unsigned short insn;
	84
	85	(the_target->read_memory) (where, (unsigned char ) &insn, 2);
	86	if (insn == sh_breakpoint)
	87	return 1;
	88
	89	/* If necessary, recognize more trap instructions here. GDB only uses the
	90	one. */
	91	return 0;
	92	}
	93
	94	/* Provide only a fill function for the general register set. ps_lgetregs
	95	will use this for NPTL support. */
	96
	97	static void sh_fill_gregset (void *buf)
	98	{
	99	int i;
	100
	101	for (i = 0; i < 23; i++)
	102	if (sh_regmap[i] != -1)
	103	collect_register (i, (char *) buf + sh_regmap[i]);
	104	}
	105
	106	struct regset_info target_regsets[] = {
	107	{ 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
	108	{ 0, 0, -1, -1, NULL, NULL }
	109	};
	110
	111	struct linux_target_ops the_low_target = {
	112	init_registers_sh,
	113	sh_num_regs,
	114	sh_regmap,
	115	sh_cannot_fetch_register,
	116	sh_cannot_store_register,
	117	sh_get_pc,
	118	sh_set_pc,
	119	(const unsigned char *) &sh_breakpoint,
	120	sh_breakpoint_len,
	121	NULL,
	122	0,
	123	sh_breakpoint_at,
	124	};