aboutsummaryrefslogtreecommitdiff
path: root/bfd/xtensa-dynconfig.c
blob: ebf4098f59ca1f667206eb90270ef9bf02323292 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/* Xtensa configuration settings loader.
   Copyright (C) 2022-2023 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;
}