/* Xtensa configuration settings loader.

   Copyright (C) 2022-2025 Free Software Foundation, Inc.

   This file is part of BFD, the Binary File Descriptor library.

   GCC 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, or (at your option) any later

   version.

   GCC 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 GCC; see the file COPYING3.  If not see

   <http://www.gnu.org/licenses/>.  */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#define XTENSA_CONFIG_DEFINITION

#include "xtensa-config.h"

#include "xtensa-dynconfig.h"

#if defined (HAVE_DLFCN_H)

#include <dlfcn.h>

#elif defined (HAVE_WINDOWS_H)

#include <windows.h>

#endif

#if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)

#define RTLD_LAZY 0      /* Dummy value.  */

static void *

dlopen (const char *file, int mode ATTRIBUTE_UNUSED)

{

  return LoadLibrary (file);

}

static void *

dlsym (void *handle, const char *name)

{

  return (void *) GetProcAddress ((HMODULE) handle, name);

}

static int ATTRIBUTE_UNUSED

dlclose (void *handle)

{

  FreeLibrary ((HMODULE) handle);

  return 0;

}

static const char *

dlerror (void)

{

  return _("Unable to load DLL.");

}

#endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)  */

#define CONFIG_ENV_NAME "XTENSA_GNU_CONFIG"

const void *xtensa_load_config (const char *name ATTRIBUTE_UNUSED,

        const void *no_plugin_def,

        const void *no_name_def ATTRIBUTE_UNUSED)

{

  static int init;

#if BFD_SUPPORTS_PLUGINS

  static void *handle;

  void *p;

  if (!init)

    {

      const char *path = getenv (CONFIG_ENV_NAME);

      init = 1;

      if (!path)

  return no_plugin_def;

      handle = dlopen (path, RTLD_LAZY);

      if (!handle)

  {

    _bfd_error_handler (_("%s is defined but could not be loaded: %s"),

            CONFIG_ENV_NAME, dlerror ());

    abort ();

  }

    }

  else if (!handle)

    {

      return no_plugin_def;

    }

  p = dlsym (handle, name);

  if (!p)

    {

      if (no_name_def)

  return no_name_def;

      _bfd_error_handler (_("%s is loaded but symbol \"%s\" is not found: %s"),

        CONFIG_ENV_NAME, name, dlerror ());

      abort ();

    }

  return p;

#else

  if (!init)

    {

      const char *path = getenv (CONFIG_ENV_NAME);

      init = 1;

      if (path)

  {

    _bfd_error_handler (_("%s is defined but plugin support is disabled"),

            CONFIG_ENV_NAME);

    abort ();

  }

    }

  return no_plugin_def;

#endif

}

XTENSA_CONFIG_INSTANCE_LIST;

const struct xtensa_config_v1 *xtensa_get_config_v1 (void)

{

  static const struct xtensa_config_v1 *config;

  if (!config)

    config = (const struct xtensa_config_v1 *) xtensa_load_config ("xtensa_config_v1",

                   &xtensa_config_v1,

                   NULL);

  return config;

}

const struct xtensa_config_v2 *xtensa_get_config_v2 (void)

{

  static const struct xtensa_config_v2 *config;

  static const struct xtensa_config_v2 def;

  if (!config)

    config = (const struct xtensa_config_v2 *) xtensa_load_config ("xtensa_config_v2",

                   &xtensa_config_v2,

                   &def);

  return config;

}