1/* Platform independent shared object routines for GDB.
2
3   Copyright (C) 2011-2020 Free Software Foundation, Inc.
4
5   This file is part of GDB.
6
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.
11
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.
16
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/>.  */
19
20#include "common-defs.h"
21#include "gdb-dlfcn.h"
22
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
31
32#ifdef NO_SHARED_LIB
33
34gdb_dlhandle_up
35gdb_dlopen (const char *filename)
36{
37  gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
38}
39
40void *
41gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
42{
43  gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
44}
45
46void
47dlclose_deleter::operator() (void *handle) const
48{
49  gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
50}
51
52int
53is_dl_available (void)
54{
55  return 0;
56}
57
58#else /* NO_SHARED_LIB */
59
60gdb_dlhandle_up
61gdb_dlopen (const char *filename)
62{
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);
71
72#ifdef HAVE_DLFCN_H
73  error (_("Could not load %s: %s"), filename, dlerror());
74#else
75  {
76    LPVOID buffer;
77    DWORD dw;
78
79    dw = GetLastError();
80
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);
86
87    error (_("Could not load %s: %s"), filename, (char *) buffer);
88  }
89#endif
90}
91
92void *
93gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
94{
95#ifdef HAVE_DLFCN_H
96  return dlsym (handle.get (), symbol);
97#elif __MINGW32__
98  return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
99#endif
100}
101
102void
103dlclose_deleter::operator() (void *handle) const
104{
105#ifdef HAVE_DLFCN_H
106  dlclose (handle);
107#elif __MINGW32__
108  FreeLibrary ((HMODULE) handle);
109#endif
110}
111
112int
113is_dl_available (void)
114{
115  return 1;
116}
117
118#endif /* NO_SHARED_LIB */
119