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      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 */
    118