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gdb-dlfcn.cc revision 1.1 
      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 
     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 */
    119