gdb/gdb-dlfcn.c

   1 /* Platform independent shared object routines for GDB.
   2
   3    Copyright (C) 2011-2019 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-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
  34 gdb_dlhandle_up
  35 gdb_dlopen (const char *filename)
  36 {
  37   gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
  38 }
  39
  40 void *
  41 gdb_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
  46 void
  47 dlclose_deleter::operator() (void *handle) const
  48 {
  49   gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
  50 }
  51
  52 int
  53 is_dl_available (void)
  54 {
  55   return 0;
  56 }
  57
  58 #else /* NO_SHARED_LIB */
  59
  60 gdb_dlhandle_up
  61 gdb_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
  92 void *
  93 gdb_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
 102 void
 103 dlclose_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
 112 int
 113 is_dl_available (void)
 114 {
 115   return 1;
 116 }
 117
 118 #endif /* NO_SHARED_LIB */