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/* Target-dependent code for SuperH running NetBSD, for GDB.

   Copyright 2002 Free Software Foundation, Inc.

   Contributed by Wasabi Systems, 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 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.  */

#include "defs.h"

#include "gdbcore.h"

#include "regcache.h"

#include "value.h"

#include "solib-svr4.h"

#include "nbsd-tdep.h"

#include "sh-tdep.h"

#include "shnbsd-tdep.h"

/* Convert an r0-r15 register number into an offset into a ptrace

   register structure.  */

static const int regmap[] =

{

  (20 * 4),     /* r0 */

  (19 * 4),     /* r1 */

  (18 * 4),     /* r2 */

  (17 * 4),     /* r3 */

  (16 * 4),     /* r4 */

  (15 * 4),     /* r5 */

  (14 * 4),     /* r6 */

  (13 * 4),     /* r7 */

  (12 * 4),     /* r8 */

  (11 * 4),     /* r9 */

  (10 * 4),     /* r10 */

  ( 9 * 4),     /* r11 */

  ( 8 * 4),     /* r12 */

  ( 7 * 4),     /* r13 */

  ( 6 * 4),     /* r14 */

  ( 5 * 4),     /* r15 */

};

#define SIZEOF_STRUCT_REG (21 * 4)

void

shnbsd_supply_reg (char *regs, int regno)

{

  int i;

  if (regno == PC_REGNUM || regno == -1)

    supply_register (PC_REGNUM, regs + (0 * 4));

  if (regno == SR_REGNUM || regno == -1)

    supply_register (SR_REGNUM, regs + (1 * 4));

  if (regno == PR_REGNUM || regno == -1)

    supply_register (PR_REGNUM, regs + (2 * 4));

  if (regno == MACH_REGNUM || regno == -1)

    supply_register (MACH_REGNUM, regs + (3 * 4));

  if (regno == MACL_REGNUM || regno == -1)

    supply_register (MACL_REGNUM, regs + (4 * 4));

  if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)

    {

      for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)

        if (regno == i || regno == -1)

          supply_register (i, regs + regmap[i - R0_REGNUM]);

    }

}

void

shnbsd_fill_reg (char *regs, int regno)

{

  int i;

  if (regno == PC_REGNUM || regno == -1)

    regcache_collect (PC_REGNUM, regs + (0 * 4));

  if (regno == SR_REGNUM || regno == -1)

    regcache_collect (SR_REGNUM, regs + (1 * 4));

  if (regno == PR_REGNUM || regno == -1)

    regcache_collect (PR_REGNUM, regs + (2 * 4));

  if (regno == MACH_REGNUM || regno == -1)

    regcache_collect (MACH_REGNUM, regs + (3 * 4));

  if (regno == MACL_REGNUM || regno == -1)

    regcache_collect (MACL_REGNUM, regs + (4 * 4));

  if ((regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) || regno == -1)

    {

      for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)

        if (regno == i || regno == -1)

          regcache_collect (i, regs + regmap[i - R0_REGNUM]);

    }

}

static void

fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,

                      int which, CORE_ADDR ignore)

{

  /* We get everything from the .reg section.  */

  if (which != 0)

    return;

  if (core_reg_size < SIZEOF_STRUCT_REG)

    {

      warning ("Wrong size register set in core file.");

      return;

    }

  /* Integer registers.  */

  shnbsd_supply_reg (core_reg_sect, -1);

}

static void

fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,

                         int which, CORE_ADDR ignore)

{

  switch (which)

    {

    case 0:  /* Integer registers.  */

      if (core_reg_size != SIZEOF_STRUCT_REG)

        warning ("Wrong size register set in core file.");

      else

        shnbsd_supply_reg (core_reg_sect, -1);

      break;

    default:

      /* Don't know what kind of register request this is; just ignore it.  */

      break;

    }

}

static struct core_fns shnbsd_core_fns =

{

  bfd_target_unknown_flavour,           /* core_flavour */

  default_check_format,                 /* check_format */

  default_core_sniffer,                 /* core_sniffer */

  fetch_core_registers,                 /* core_read_registers */

  NULL                                  /* next */

};

static struct core_fns shnbsd_elfcore_fns =

{

  bfd_target_elf_flavour,               /* core_flavour */

  default_check_format,                 /* check_format */

  default_core_sniffer,                 /* core_sniffer */

  fetch_elfcore_registers,              /* core_read_registers */

  NULL                                  /* next */

};

static int

shnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)

{

  /* FIXME: Need to add support for kernel-provided signal trampolines.  */

  return (nbsd_pc_in_sigtramp (pc, func_name));

}

static void

shnbsd_init_abi (struct gdbarch_info info,

                  struct gdbarch *gdbarch)

{

  set_gdbarch_pc_in_sigtramp (gdbarch, shnbsd_pc_in_sigtramp);

  set_solib_svr4_fetch_link_map_offsets (gdbarch,

                                nbsd_ilp32_solib_svr4_fetch_link_map_offsets);

}

void

_initialize_shnbsd_tdep (void)

{

  add_core_fns (&shnbsd_core_fns);

  add_core_fns (&shnbsd_elfcore_fns);

  gdbarch_register_osabi (bfd_arch_sh, GDB_OSABI_NETBSD_ELF, shnbsd_init_abi);

}