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/* Target-dependent code for DICOS running on i386's, for GDB.

   Copyright (C) 2008, 2009, 2010 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 "defs.h"

#include "osabi.h"

#include "gdb_string.h"

#include "dicos-tdep.h"

static CORE_ADDR

i386_dicos_push_dummy_code (struct gdbarch *gdbarch,

                            CORE_ADDR sp, CORE_ADDR funaddr,

                            struct value **args, int nargs,

                            struct type *value_type,

                            CORE_ADDR *real_pc, CORE_ADDR *bp_addr,

                            struct regcache *regcache)

{

  int bplen;

  CORE_ADDR bppc = sp;

  gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);

  *bp_addr = sp - bplen;

  *real_pc = funaddr;

  return *bp_addr;

}

static void

i386_dicos_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)

{

  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  dicos_init_abi (gdbarch);

  set_gdbarch_push_dummy_code (gdbarch, i386_dicos_push_dummy_code);

}

static enum gdb_osabi

i386_dicos_osabi_sniffer (bfd *abfd)

{

  char *target_name = bfd_get_target (abfd);

  /* On x86-DICOS, the Load Module's "header" section is 36 bytes.  */

  if (strcmp (target_name, "elf32-i386") == 0

      && dicos_load_module_p (abfd, 36))

    return GDB_OSABI_DICOS;

  return GDB_OSABI_UNKNOWN;

}

/* Provide a prototype to silence -Wmissing-prototypes.  */

void _initialize_i386_dicos_tdep (void);

void

_initialize_i386_dicos_tdep (void)

{

  gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,

                                  i386_dicos_osabi_sniffer);

  gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_DICOS,

                          i386_dicos_init_abi);

}