gdbsupport/gdb-dlfcn.cc

   1 /* Platform independent shared object routines for GDB.
   2
   3    Copyright (C) 2011-2024 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 "gdb-dlfcn.h"
  21
  22 #ifdef HAVE_DLFCN_H
  23 #include <dlfcn.h>
  24 #elif __MINGW32__
  25 #include <windows.h>
  26 #else
  27 /* Unsupported configuration. */
  28 #define NO_SHARED_LIB
  29 #endif
  30
  31 #ifdef NO_SHARED_LIB
  32
  33 gdb_dlhandle_up
  34 gdb_dlopen (const char *filename)
  35 {
  36   gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
  37 }
  38
  39 void *
  40 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
  41 {
  42   gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
  43 }
  44
  45 void
  46 dlclose_deleter::operator() (void *handle) const
  47 {
  48   gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
  49 }
  50
  51 int
  52 is_dl_available (void)
  53 {
  54   return 0;
  55 }
  56
  57 #else /* NO_SHARED_LIB */
  58
  59 gdb_dlhandle_up
  60 gdb_dlopen (const char *filename)
  61 {
  62   void *result;
  63 #ifdef HAVE_DLFCN_H
  64   result = dlopen (filename, RTLD_NOW);
  65 #elif __MINGW32__
  66   result = (void *) LoadLibrary (filename);
  67 #endif
  68   if (result != NULL)
  69     return gdb_dlhandle_up (result);
  70
  71 #ifdef HAVE_DLFCN_H
  72   error (_("Could not load %s: %s"), filename, dlerror());
  73 #else
  74   {
  75     LPVOID buffer;
  76     DWORD dw;
  77
  78     dw = GetLastError();
  79
  80     FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
  81                    FORMAT_MESSAGE_IGNORE_INSERTS,
  82                    NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  83                    (LPTSTR) &buffer,
  84                    0, NULL);
  85
  86     error (_("Could not load %s: %s"), filename, (char *) buffer);
  87   }
  88 #endif
  89 }
  90
  91 void *
  92 gdb_dlsym (const gdb_dlhandle_up &handle, const char *symbol)
  93 {
  94 #ifdef HAVE_DLFCN_H
  95   return dlsym (handle.get (), symbol);
  96 #elif __MINGW32__
  97   return (void *) GetProcAddress ((HMODULE) handle.get (), symbol);
  98 #endif
  99 }
 100
 101 void
 102 dlclose_deleter::operator() (void *handle) const
 103 {
 104 #ifdef HAVE_DLFCN_H
 105   dlclose (handle);
 106 #elif __MINGW32__
 107   FreeLibrary ((HMODULE) handle);
 108 #endif
 109 }
 110
 111 int
 112 is_dl_available (void)
 113 {
 114   return 1;
 115 }
 116
 117 #endif /* NO_SHARED_LIB */