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d0a2cfbd | 1 | /* Xtensa configuration settings loader. |
d87bef3a | 2 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
d0a2cfbd MF |
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 * | |
39 | dlopen (const char *file, int mode ATTRIBUTE_UNUSED) | |
40 | { | |
41 | return LoadLibrary (file); | |
42 | } | |
43 | ||
44 | static void * | |
45 | dlsym (void *handle, const char *name) | |
46 | { | |
47 | return (void *) GetProcAddress ((HMODULE) handle, name); | |
48 | } | |
49 | ||
50 | static int ATTRIBUTE_UNUSED | |
51 | dlclose (void *handle) | |
52 | { | |
53 | FreeLibrary ((HMODULE) handle); | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static const char * | |
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 | ||
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 | ||
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 | ||
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 | } |