reactos/lib/sdk/crt/startup/crtdll.c

   1 /**
   2  * This file has no copyright assigned and is placed in the Public Domain.
   3  * This file is part of the w64 mingw-runtime package.
   4  * No warranty is given; refer to the file DISCLAIMER.PD within this package.
   5  */
   6
   7 #ifdef CRTDLL
   8 #undef CRTDLL
   9 #ifndef _DLL
  10 #define _DLL
  11 #endif
  12
  13 #include <oscalls.h>
  14 #include <internal.h>
  15 #include <stdlib.h>
  16 #include <windows.h>
  17 #define _DECL_DLLMAIN
  18 #include <process.h>
  19 #include <crtdbg.h>
  20
  21 #ifndef _CRTIMP
  22 #ifdef CRTDLL
  23 #define _CRTIMP __declspec(dllexport)
  24 #else
  25 #ifdef _DLL
  26 #define _CRTIMP __declspec(dllimport)
  27 #else
  28 #define _CRTIMP
  29 #endif
  30 #endif
  31 #endif
  32 #include <sect_attribs.h>
  33 #include <locale.h>
  34
  35 extern void __cdecl _initterm(_PVFV *,_PVFV *);
  36
  37 #if defined(__GNUC__)
  38 extern void __main (void);
  39 extern void _pei386_runtime_relocator (void);
  40 #endif
  41
  42 extern _CRTALLOC(".CRT$XIA") _PIFV __xi_a[];
  43 extern _CRTALLOC(".CRT$XIZ") _PIFV __xi_z[];
  44 extern _CRTALLOC(".CRT$XCA") _PVFV __xc_a[];
  45 extern _CRTALLOC(".CRT$XCZ") _PVFV __xc_z[];
  46
  47 /* TLS initialization hook.  */
  48 extern const PIMAGE_TLS_CALLBACK __dyn_tls_init_callback;
  49
  50 static int __proc_attached = 0;
  51
  52 extern _PVFV *__onexitbegin;
  53 extern _PVFV *__onexitend;
  54
  55 extern int mingw_app_type;
  56
  57 extern WINBOOL WINAPI DllMain (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved);
  58
  59 extern WINBOOL WINAPI DllEntryPoint (HANDLE, DWORD, LPVOID);
  60
  61 static int pre_c_init (void);
  62
  63 _CRTALLOC(".CRT$XIAA") _PIFV pcinit = pre_c_init;
  64
  65 static int
  66 pre_c_init (void)
  67 {
  68   _PVFV *onexitbegin;
  69
  70   onexitbegin = (_PVFV *) malloc (32 * sizeof (_PVFV));
  71   __onexitend = __onexitbegin = (_PVFV *) _encode_pointer (onexitbegin);
  72
  73   if (onexitbegin == NULL)
  74     return 1;
  75   *onexitbegin = (_PVFV) NULL;
  76   return 0;
  77 }
  78
  79 WINBOOL WINAPI _CRT_INIT (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved)
  80 {
  81   if (dwReason == DLL_PROCESS_DETACH)
  82     {
  83       if (__proc_attached > 0)
  84         __proc_attached--;
  85       else
  86         return FALSE;
  87     }
  88   if (dwReason == DLL_PROCESS_ATTACH)
  89     {
  90       void *lock_free = NULL;
  91       void *fiberid = ((PNT_TIB)NtCurrentTeb ())->StackBase;
  92       int nested = FALSE;
  93
  94       while ((lock_free = InterlockedCompareExchangePointer ((volatile PVOID *) &__native_startup_lock,
  95                                                              fiberid, 0)) != 0)
  96         {
  97           if (lock_free == fiberid)
  98             {
  99               nested = TRUE;
 100               break;
 101             }
 102           Sleep(1000);
 103         }
 104       if (__native_startup_state != __uninitialized)
 105         {
 106           _amsg_exit(31);
 107         }
 108       else
 109         {
 110           __native_startup_state = __initializing;
 111
 112           _initterm ((_PVFV *) (void *) __xi_a, (_PVFV *) (void *) __xi_z);
 113           _initterm (__xc_a,__xc_z);
 114           __native_startup_state = __initialized;
 115         }
 116       if (! nested)
 117         {
 118           (void) InterlockedExchangePointer ((volatile PVOID *) &__native_startup_lock, 0);
 119         }
 120       if (__dyn_tls_init_callback != NULL)
 121         {
 122           __dyn_tls_init_callback (hDllHandle, DLL_THREAD_ATTACH, lpreserved);
 123         }
 124       __proc_attached++;
 125     }
 126   else if (dwReason == DLL_PROCESS_DETACH)
 127     {
 128       void *lock_free = NULL;
 129       while ((lock_free = InterlockedCompareExchangePointer ((volatile PVOID *) &__native_startup_lock,(PVOID) 1, 0)) != 0)
 130         {
 131           Sleep(1000);
 132         }
 133       if(__native_startup_state!=__initialized)
 134         {
 135           _amsg_exit (31);
 136         }
 137       else
 138         {
 139           _PVFV * onexitbegin = (_PVFV *) _decode_pointer (__onexitbegin);
 140           if (onexitbegin)
 141             {
 142               _PVFV *onexitend = (_PVFV *) _decode_pointer (__onexitend);
 143               while (--onexitend >= onexitbegin)
 144                 if (*onexitend != NULL)
 145                   (**onexitend) ();
 146               free (onexitbegin);
 147               __onexitbegin = __onexitend = (_PVFV *) NULL;
 148             }
 149           __native_startup_state = __uninitialized;
 150           (void) InterlockedExchangePointer ((volatile PVOID *) &__native_startup_lock, 0);
 151         }
 152     }
 153   return TRUE;
 154 }
 155
 156 static WINBOOL __DllMainCRTStartup (HANDLE, DWORD, LPVOID);
 157
 158 WINBOOL WINAPI DllMainCRTStartup (HANDLE, DWORD, LPVOID);
 159 int __mingw_init_ehandler (void);
 160
 161 WINBOOL WINAPI
 162 DllMainCRTStartup (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved)
 163 {
 164   mingw_app_type = 0;
 165   if (dwReason == DLL_PROCESS_ATTACH)
 166     {
 167       __security_init_cookie ();
 168 #ifdef _WIN64
 169       __mingw_init_ehandler ();
 170 #endif
 171     }
 172   return __DllMainCRTStartup (hDllHandle, dwReason, lpreserved);
 173 }
 174
 175 __declspec(noinline) WINBOOL
 176 __DllMainCRTStartup (HANDLE hDllHandle, DWORD dwReason, LPVOID lpreserved)
 177 {
 178   WINBOOL retcode = TRUE;
 179
 180   __native_dllmain_reason = dwReason;
 181   if (dwReason == DLL_PROCESS_DETACH && __proc_attached == 0)
 182     {
 183         retcode = FALSE;
 184         goto i__leave;
 185     }
 186 #if defined(__GNUC__)
 187   _pei386_runtime_relocator ();
 188 #endif
 189   if (dwReason == DLL_PROCESS_ATTACH || dwReason == DLL_THREAD_ATTACH)
 190     {
 191         retcode = _CRT_INIT (hDllHandle, dwReason, lpreserved);
 192         if (!retcode)
 193           goto i__leave;
 194         retcode = DllEntryPoint (hDllHandle, dwReason, lpreserved);
 195         if (! retcode)
 196           {
 197             if (dwReason == DLL_PROCESS_ATTACH)
 198               _CRT_INIT (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 199             goto i__leave;
 200           }
 201     }
 202 #if defined(__GNUC__)
 203   if (dwReason == DLL_PROCESS_ATTACH)
 204     __main ();
 205 #endif
 206   retcode = DllMain(hDllHandle,dwReason,lpreserved);
 207   if (dwReason == DLL_PROCESS_ATTACH && ! retcode)
 208     {
 209         DllMain (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 210         DllEntryPoint (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 211         _CRT_INIT (hDllHandle, DLL_PROCESS_DETACH, lpreserved);
 212     }
 213   if (dwReason == DLL_PROCESS_DETACH || dwReason == DLL_THREAD_DETACH)
 214     {
 215         retcode = DllEntryPoint (hDllHandle, dwReason, lpreserved);
 216         if (_CRT_INIT (hDllHandle, dwReason, lpreserved) == FALSE)
 217           retcode = FALSE;
 218     }
 219 i__leave:
 220   __native_dllmain_reason = UINT_MAX;
 221   return retcode ;
 222 }
 223 #endif