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[binutils-gdb.git] / gdbsupport / gdb-dlfcn.cc
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1 /* Platform independent shared object routines for GDB.
3 Copyright (C) 2011-2024 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "common-defs.h"
21 #include "gdb-dlfcn.h"
23 #ifdef HAVE_DLFCN_H
24 #include <dlfcn.h>
25 #elif __MINGW32__
26 #include <windows.h>
27 #else
28 /* Unsupported configuration. */
29 #define NO_SHARED_LIB
30 #endif
32 #ifdef NO_SHARED_LIB
34 gdb_dlhandle_up
35 gdb_dlopen (const char *filename)
37 gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
40 void *
41 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
43 gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
46 void
47 dlclose_deleter::operator() (void *handle) const
49 gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
52 int
53 is_dl_available (void)
55 return 0;
58 #else /* NO_SHARED_LIB */
60 gdb_dlhandle_up
61 gdb_dlopen (const char *filename)
63 void *result;
64 #ifdef HAVE_DLFCN_H
65 result = dlopen (filename, RTLD_NOW);
66 #elif __MINGW32__
67 result = (void *) LoadLibrary (filename);
68 #endif
69 if (result != NULL)
70 return gdb_dlhandle_up (result);
72 #ifdef HAVE_DLFCN_H
73 error (_("Could not load %s: %s"), filename, dlerror());
74 #else
76 LPVOID buffer;
77 DWORD dw;
79 dw = GetLastError();
81 FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
82 FORMAT_MESSAGE_IGNORE_INSERTS,
83 NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
84 (LPTSTR) &buffer,
85 0, NULL);
87 error (_("Could not load %s: %s"), filename, (char *) buffer);
89 #endif
92 void *
93 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
95 #ifdef HAVE_DLFCN_H
96 return dlsym (handle.get (), symbol);
97 #elif __MINGW32__
98 return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
99 #endif
102 void
103 dlclose_deleter::operator() (void *handle) const
105 #ifdef HAVE_DLFCN_H
106 dlclose (handle);
107 #elif __MINGW32__
108 FreeLibrary ((HMODULE) handle);
109 #endif
113 is_dl_available (void)
115 return 1;
118 #endif /* NO_SHARED_LIB */