crypto/dllmain.c

   1 #include "internal/cryptlib_int.h"
   2
   3 #if defined(_WIN32) || defined(__CYGWIN__)
   4 # ifdef __CYGWIN__
   5 /* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
   6 #  include <windows.h>
   7 /*
   8  * this has side-effect of _WIN32 getting defined, which otherwise is
   9  * mutually exclusive with __CYGWIN__...
  10  */
  11 # endif
  12
  13 /*
  14  * All we really need to do is remove the 'error' state when a thread
  15  * detaches
  16  */
  17
  18 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved);
  19 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  20 {
  21     switch (fdwReason) {
  22     case DLL_PROCESS_ATTACH:
  23         OPENSSL_cpuid_setup();
  24 # if defined(_WIN32_WINNT)
  25         {
  26             IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *) hinstDLL;
  27             IMAGE_NT_HEADERS *nt_headers;
  28
  29             if (dos_header->e_magic == IMAGE_DOS_SIGNATURE) {
  30                 nt_headers = (IMAGE_NT_HEADERS *) ((char *)dos_header
  31                                                    + dos_header->e_lfanew);
  32                 if (nt_headers->Signature == IMAGE_NT_SIGNATURE &&
  33                     hinstDLL !=
  34                     (HINSTANCE) (nt_headers->OptionalHeader.ImageBase))
  35                     OPENSSL_NONPIC_relocated = 1;
  36             }
  37         }
  38 # endif
  39         break;
  40     case DLL_THREAD_ATTACH:
  41         break;
  42     case DLL_THREAD_DETACH:
  43         OPENSSL_thread_stop();
  44         break;
  45     case DLL_PROCESS_DETACH:
  46         break;
  47     }
  48     return (TRUE);
  49 }
  50 #endif
  51