1 /* Xtensa configuration settings loader.
2 Copyright (C) 2022-2024 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #include "sysdep.h"
21 #include "bfd.h"
22 #include "libbfd.h"
23
24 #define XTENSA_CONFIG_DEFINITION
25 #include "xtensa-config.h"
26 #include "xtensa-dynconfig.h"
27
28 #if defined (HAVE_DLFCN_H)
29 #include <dlfcn.h>
30 #elif defined (HAVE_WINDOWS_H)
31 #include <windows.h>
32 #endif
33
34 #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
35
36 #define RTLD_LAZY 0 /* Dummy value. */
37
38 static void *
dlopen(const char * file,int mode ATTRIBUTE_UNUSED)39 dlopen (const char *file, int mode ATTRIBUTE_UNUSED)
40 {
41 return LoadLibrary (file);
42 }
43
44 static void *
dlsym(void * handle,const char * name)45 dlsym (void *handle, const char *name)
46 {
47 return (void *) GetProcAddress ((HMODULE) handle, name);
48 }
49
50 static int ATTRIBUTE_UNUSED
dlclose(void * handle)51 dlclose (void *handle)
52 {
53 FreeLibrary ((HMODULE) handle);
54 return 0;
55 }
56
57 static const char *
dlerror(void)58 dlerror (void)
59 {
60 return _("Unable to load DLL.");
61 }
62
63 #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
64
65 #define CONFIG_ENV_NAME "XTENSA_GNU_CONFIG"
66
xtensa_load_config(const char * name ATTRIBUTE_UNUSED,const void * no_plugin_def,const void * no_name_def ATTRIBUTE_UNUSED)67 const void *xtensa_load_config (const char *name ATTRIBUTE_UNUSED,
68 const void *no_plugin_def,
69 const void *no_name_def ATTRIBUTE_UNUSED)
70 {
71 static int init;
72 #if BFD_SUPPORTS_PLUGINS
73 static void *handle;
74 void *p;
75
76 if (!init)
77 {
78 const char *path = getenv (CONFIG_ENV_NAME);
79
80 init = 1;
81 if (!path)
82 return no_plugin_def;
83 handle = dlopen (path, RTLD_LAZY);
84 if (!handle)
85 {
86 _bfd_error_handler (_("%s is defined but could not be loaded: %s"),
87 CONFIG_ENV_NAME, dlerror ());
88 abort ();
89 }
90 }
91 else if (!handle)
92 {
93 return no_plugin_def;
94 }
95
96 p = dlsym (handle, name);
97 if (!p)
98 {
99 if (no_name_def)
100 return no_name_def;
101
102 _bfd_error_handler (_("%s is loaded but symbol \"%s\" is not found: %s"),
103 CONFIG_ENV_NAME, name, dlerror ());
104 abort ();
105 }
106 return p;
107 #else
108 if (!init)
109 {
110 const char *path = getenv (CONFIG_ENV_NAME);
111
112 init = 1;
113 if (path)
114 {
115 _bfd_error_handler (_("%s is defined but plugin support is disabled"),
116 CONFIG_ENV_NAME);
117 abort ();
118 }
119 }
120 return no_plugin_def;
121 #endif
122 }
123
124 XTENSA_CONFIG_INSTANCE_LIST;
125
xtensa_get_config_v1(void)126 const struct xtensa_config_v1 *xtensa_get_config_v1 (void)
127 {
128 static const struct xtensa_config_v1 *config;
129
130 if (!config)
131 config = (const struct xtensa_config_v1 *) xtensa_load_config ("xtensa_config_v1",
132 &xtensa_config_v1,
133 NULL);
134 return config;
135 }
136
xtensa_get_config_v2(void)137 const struct xtensa_config_v2 *xtensa_get_config_v2 (void)
138 {
139 static const struct xtensa_config_v2 *config;
140 static const struct xtensa_config_v2 def;
141
142 if (!config)
143 config = (const struct xtensa_config_v2 *) xtensa_load_config ("xtensa_config_v2",
144 &xtensa_config_v2,
145 &def);
146 return config;
147 }
148