gdb/gdb-dlfcn.c

   1 /* Platform independent shared object routines for GDB.
   2
   3    Copyright (C) 2011-2014 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 "defs.h"
  21 #include "gdb_assert.h"
  22
  23 #include "gdb-dlfcn.h"
  24
  25 #ifdef HAVE_DLFCN_H
  26 #include <dlfcn.h>
  27 #elif __MINGW32__
  28 #include <windows.h>
  29 #else
  30 /* Unsupported configuration. */
  31 #define NO_SHARED_LIB
  32 #endif
  33
  34 #ifdef NO_SHARED_LIB
  35
  36 void *
  37 gdb_dlopen (const char *filename)
  38 {
  39   gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
  40 }
  41
  42 void *
  43 gdb_dlsym (void *handle, const char *symbol)
  44 {
  45   gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
  46 }
  47
  48 struct cleanup *
  49 make_cleanup_dlclose (void *handle)
  50 {
  51   gdb_assert_not_reached ("make_cleanup_dlclose should not be called on this "
  52                           "platform.");
  53 }
  54
  55 int
  56 gdb_dlclose (void *handle)
  57 {
  58   gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
  59 }
  60
  61 int
  62 is_dl_available (void)
  63 {
  64   return 0;
  65 }
  66
  67 #else /* NO_SHARED_LIB */
  68
  69 void *
  70 gdb_dlopen (const char *filename)
  71 {
  72   void *result;
  73 #ifdef HAVE_DLFCN_H
  74   result = dlopen (filename, RTLD_NOW);
  75 #elif __MINGW32__
  76   result = (void *) LoadLibrary (filename);
  77 #endif
  78   if (result != NULL)
  79     return result;
  80
  81 #ifdef HAVE_DLFCN_H
  82   error (_("Could not load %s: %s"), filename, dlerror());
  83 #else
  84   {
  85     LPVOID buffer;
  86     DWORD dw;
  87
  88     dw = GetLastError();
  89
  90     FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
  91                    FORMAT_MESSAGE_IGNORE_INSERTS,
  92                    NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  93                    (LPTSTR) &buffer,
  94                    0, NULL);
  95
  96     error (_("Could not load %s: %s"), filename, (char *) buffer);
  97   }
  98 #endif
  99 }
 100
 101 void *
 102 gdb_dlsym (void *handle, const char *symbol)
 103 {
 104 #ifdef HAVE_DLFCN_H
 105   return dlsym (handle, symbol);
 106 #elif __MINGW32__
 107   return (void *) GetProcAddress (handle, symbol);
 108 #endif
 109 }
 110
 111 int
 112 gdb_dlclose (void *handle)
 113 {
 114 #ifdef HAVE_DLFCN_H
 115   return dlclose (handle);
 116 #elif __MINGW32__
 117   return !((int) FreeLibrary (handle));
 118 #endif
 119 }
 120
 121 static void
 122 do_dlclose_cleanup (void *handle)
 123 {
 124   gdb_dlclose (handle);
 125 }
 126
 127 struct cleanup *
 128 make_cleanup_dlclose (void *handle)
 129 {
 130   return make_cleanup (do_dlclose_cleanup, handle);
 131 }
 132
 133 int
 134 is_dl_available (void)
 135 {
 136   return 1;
 137 }
 138
 139 #endif /* NO_SHARED_LIB */