ReactOS 0.4.15-dev-5875-g7c755d9
crtexe.c
Go to the documentation of this file.
1
7#define SPECIAL_CRTEXE
8
9#include <oscalls.h>
10#include <internal.h>
11#include <process.h>
12#include <signal.h>
13#include <math.h>
14#include <stdlib.h>
15#include <tchar.h>
16#include <sect_attribs.h>
17#include <locale.h>
18#ifdef _MBCS
19#include <mbstring.h>
20#endif
21
22/* Special handling for ARM & ARM64, __winitenv & __initenv aren't present there. */
23#if !defined(__arm__) && !defined(__aarch64__)
24_CRTIMP extern wchar_t** __winitenv;
25_CRTIMP extern char** __initenv;
26#endif
27
28/* Hack, for bug in ld. Will be removed soon. */
29#if defined(__GNUC__)
30#define __ImageBase __MINGW_LSYMBOL(_image_base__)
31#endif
32
33/* This symbol is defined by ld. */
34extern IMAGE_DOS_HEADER __ImageBase;
35
36extern void __cdecl _fpreset (void);
37#define SPACECHAR _T(' ')
38#define DQUOTECHAR _T('\"')
39
40extern int _dowildcard;
41
42extern _CRTIMP void __cdecl _initterm(_PVFV *, _PVFV *);
43
44static int __cdecl check_managed_app (void);
45
46extern _CRTALLOC(".CRT$XIA") _PIFV __xi_a[];
47extern _CRTALLOC(".CRT$XIZ") _PIFV __xi_z[];
48extern _CRTALLOC(".CRT$XCA") _PVFV __xc_a[];
49extern _CRTALLOC(".CRT$XCZ") _PVFV __xc_z[];
50
51/* TLS initialization hook. */
52extern const PIMAGE_TLS_CALLBACK __dyn_tls_init_callback;
53
54extern _PVFV *__onexitbegin;
55extern _PVFV *__onexitend;
56
57extern int mingw_app_type;
58
59HINSTANCE __mingw_winmain_hInstance;
60_TCHAR *__mingw_winmain_lpCmdLine;
61DWORD __mingw_winmain_nShowCmd;
62
63static int argc;
64extern void __main(void);
65#ifdef WPRFLAG
66static wchar_t **argv;
67static wchar_t **envp;
68#else
69static char **argv;
70static char **envp;
71#endif
72
73static int argret;
74static int mainret=0;
75static int managedapp;
76static int has_cctor = 0;
77static _startupinfo startinfo;
78extern LPTOP_LEVEL_EXCEPTION_FILTER __mingw_oldexcpt_handler;
79
80extern void _pei386_runtime_relocator (void);
81long CALLBACK _gnu_exception_handler (EXCEPTION_POINTERS * exception_data);
82#ifdef WPRFLAG
83static void duplicate_ppstrings (int ac, wchar_t ***av);
84#else
85static void duplicate_ppstrings (int ac, char ***av);
86#endif
87
88static int __cdecl pre_c_init (void);
89static void __cdecl pre_cpp_init (void);
90static void __cdecl __mingw_prepare_except_for_msvcr80_and_higher (void);
91_CRTALLOC(".CRT$XIAA") _PIFV mingw_pcinit = pre_c_init;
92_CRTALLOC(".CRT$XCAA") _PVFV mingw_pcppinit = pre_cpp_init;
93
94extern int _MINGW_INSTALL_DEBUG_MATHERR;
95
96#ifdef __GNUC__
97extern void __do_global_dtors(void);
98#endif
99
100static int __cdecl
101pre_c_init (void)
102{
103 managedapp = check_managed_app ();
104 if (mingw_app_type)
105 __set_app_type(_GUI_APP);
106 else
107 __set_app_type (_CONSOLE_APP);
108 __onexitbegin = __onexitend = (_PVFV *)(-1);
109
110#ifdef WPRFLAG
111 _wsetargv();
112#else
113 _setargv();
114#endif
115 if (_MINGW_INSTALL_DEBUG_MATHERR == 1)
116 {
117 __setusermatherr (_matherr);
118 }
119#ifndef __clang__ /* FIXME: CORE-14042 */
120 if (__globallocalestatus == -1)
121 {
122 }
123#endif
124 return 0;
125}
126
127static void __cdecl
128pre_cpp_init (void)
129{
130 startinfo.newmode = _newmode;
131
132#ifdef WPRFLAG
133 argret = __wgetmainargs(&argc,&argv,&envp,_dowildcard,&startinfo);
134#else
135 argret = __getmainargs(&argc,&argv,&envp,_dowildcard,&startinfo);
136#endif
137}
138
139static int __cdecl __tmainCRTStartup (void);
140
141int __cdecl WinMainCRTStartup (void);
142
143int __cdecl WinMainCRTStartup (void)
144{
145 int ret = 255;
146#ifdef __SEH__
147 asm ("\t.l_startw:\n"
148 "\t.seh_handler __C_specific_handler, @except\n"
149 "\t.seh_handlerdata\n"
150 "\t.long 1\n"
151 "\t.rva .l_startw, .l_endw, _gnu_exception_handler ,.l_endw\n"
152 "\t.text"
153 );
154#endif
155 mingw_app_type = 1;
156 __security_init_cookie ();
157 ret = __tmainCRTStartup ();
158#ifdef __SEH__
159 asm ("\tnop\n"
160 "\t.l_endw: nop\n");
161#endif
162 return ret;
163}
164
165int __cdecl mainCRTStartup (void);
166BOOL crt_process_init(void);
167
168#ifdef _WIN64
169int __mingw_init_ehandler (void);
170#endif
171
172int __cdecl mainCRTStartup (void)
173{
174 int ret = 255;
175#ifndef _DLL
176 if (!crt_process_init())
177 {
178 return -1;
179 }
180#endif
181#ifdef __SEH__
182 asm ("\t.l_start:\n"
183 "\t.seh_handler __C_specific_handler, @except\n"
184 "\t.seh_handlerdata\n"
185 "\t.long 1\n"
186 "\t.rva .l_start, .l_end, _gnu_exception_handler ,.l_end\n"
187 "\t.text"
188 );
189#endif
190 mingw_app_type = 0;
191 __security_init_cookie ();
192 ret = __tmainCRTStartup ();
193#ifdef __SEH__
194 asm ("\tnop\n"
195 "\t.l_end: nop\n");
196#endif
197 return ret;
198}
199
200static
201__declspec(noinline)
202int __cdecl
203__tmainCRTStartup (void)
204{
205 _TCHAR *lpszCommandLine = NULL;
206 STARTUPINFO StartupInfo;
207 WINBOOL inDoubleQuote = FALSE;
208 memset (&StartupInfo, 0, sizeof (STARTUPINFO));
209
210#ifndef _WIN64
211 /* We need to make sure that this function is build with frame-pointer
212 and that we align the stack to 16 bytes for the sake of SSE ops in main
213 or in functions inlined into main. */
214 lpszCommandLine = (_TCHAR *) alloca (32);
215 memset (lpszCommandLine, 0xcc, 32);
216#ifdef __GNUC__
217 asm __volatile__ ("andl $-16, %%esp" : : : "%esp");
218#endif
219#endif
220
221 if (mingw_app_type)
222 GetStartupInfo (&StartupInfo);
223 {
224 void *lock_free = NULL;
225 void *fiberid = ((PNT_TIB)NtCurrentTeb())->StackBase;
226 int nested = FALSE;
227 while((lock_free = InterlockedCompareExchangePointer ((volatile PVOID *) &__native_startup_lock,
228 fiberid, 0)) != 0)
229 {
230 if (lock_free == fiberid)
231 {
232 nested = TRUE;
233 break;
234 }
235 Sleep(1000);
236 }
237 if (__native_startup_state == __initializing)
238 {
239 _amsg_exit (31);
240 }
241 else if (__native_startup_state == __uninitialized)
242 {
243 __native_startup_state = __initializing;
244 _initterm ((_PVFV *)(void *)__xi_a, (_PVFV *)(void *) __xi_z);
245 }
246 else
247 has_cctor = 1;
248
249 if (__native_startup_state == __initializing)
250 {
251 _initterm (__xc_a, __xc_z);
252 __native_startup_state = __initialized;
253 }
254 _ASSERTE(__native_startup_state == __initialized);
255 if (! nested)
256 (VOID)InterlockedExchangePointer ((volatile PVOID *) &__native_startup_lock, 0);
257
258 if (__dyn_tls_init_callback != NULL)
259 __dyn_tls_init_callback (NULL, DLL_THREAD_ATTACH, NULL);
260
261 _pei386_runtime_relocator ();
262 __mingw_oldexcpt_handler = SetUnhandledExceptionFilter (_gnu_exception_handler);
263#ifdef _WIN64
264 __mingw_init_ehandler ();
265#endif
266 __mingw_prepare_except_for_msvcr80_and_higher ();
267
268 _fpreset ();
269
270 if (mingw_app_type)
271 {
272#ifdef WPRFLAG
273 lpszCommandLine = (_TCHAR *) _wcmdln;
274#else
275 lpszCommandLine = (char *) _acmdln;
276#endif
277 while (*lpszCommandLine > SPACECHAR || (*lpszCommandLine && inDoubleQuote))
278 {
279 if (*lpszCommandLine == DQUOTECHAR)
280 inDoubleQuote = !inDoubleQuote;
281#ifdef _MBCS
282 if (_ismbblead (*lpszCommandLine))
283 {
284 if (lpszCommandLine) /* FIXME: Why this check? Should I check for *lpszCommandLine != 0 too? */
285 lpszCommandLine++;
286 }
287#endif
288 ++lpszCommandLine;
289 }
290 while (*lpszCommandLine && (*lpszCommandLine <= SPACECHAR))
291 lpszCommandLine++;
292
293 __mingw_winmain_hInstance = (HINSTANCE) &__ImageBase;
294 __mingw_winmain_lpCmdLine = lpszCommandLine;
295 __mingw_winmain_nShowCmd = StartupInfo.dwFlags & STARTF_USESHOWWINDOW ?
296 StartupInfo.wShowWindow : SW_SHOWDEFAULT;
297 }
298 duplicate_ppstrings (argc, &argv);
299 __main ();
300#ifdef WPRFLAG
301#if !defined(__arm__) && !defined(__aarch64__)
302 __winitenv = envp;
303#endif
304 /* C++ initialization.
305 gcc inserts this call automatically for a function called main, but not for wmain. */
306 mainret = wmain (argc, argv, envp);
307#else
308#if !defined(__arm__) && !defined(__aarch64__)
309 __initenv = envp;
310#endif
311 mainret = main (argc, argv, envp);
312#endif
313
314#ifdef __GNUC__
315 __do_global_dtors();
316#endif
317
318 if (!managedapp)
319 exit (mainret);
320
321 if (has_cctor == 0)
322 _cexit ();
323 }
324 return mainret;
325}
326
327extern int mingw_initltsdrot_force;
328extern int mingw_initltsdyn_force;
329extern int mingw_initltssuo_force;
330extern int mingw_initcharmax;
331
332static int __cdecl
333check_managed_app (void)
334{
335 PIMAGE_DOS_HEADER pDOSHeader;
336 PIMAGE_NT_HEADERS pPEHeader;
337 PIMAGE_OPTIONAL_HEADER32 pNTHeader32;
338 PIMAGE_OPTIONAL_HEADER64 pNTHeader64;
339
340 /* Force to be linked. */
341 mingw_initltsdrot_force=1;
342 mingw_initltsdyn_force=1;
343 mingw_initltssuo_force=1;
344 mingw_initcharmax=1;
345
346 pDOSHeader = (PIMAGE_DOS_HEADER) &__ImageBase;
347 if (pDOSHeader->e_magic != IMAGE_DOS_SIGNATURE)
348 return 0;
349
350 pPEHeader = (PIMAGE_NT_HEADERS)((char *)pDOSHeader + pDOSHeader->e_lfanew);
351 if (pPEHeader->Signature != IMAGE_NT_SIGNATURE)
352 return 0;
353
354 pNTHeader32 = (PIMAGE_OPTIONAL_HEADER32) &pPEHeader->OptionalHeader;
355 switch (pNTHeader32->Magic)
356 {
357 case IMAGE_NT_OPTIONAL_HDR32_MAGIC:
358 if (pNTHeader32->NumberOfRvaAndSizes <= IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR)
359 return 0;
360 return !! pNTHeader32->DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR].VirtualAddress;
361 case IMAGE_NT_OPTIONAL_HDR64_MAGIC:
362 pNTHeader64 = (PIMAGE_OPTIONAL_HEADER64)pNTHeader32;
363 if (pNTHeader64->NumberOfRvaAndSizes <= IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR)
364 return 0;
365 return !! pNTHeader64->DataDirectory[IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR].VirtualAddress;
366 }
367 return 0;
368}
369
370#ifdef WPRFLAG
371static size_t wbytelen(const wchar_t *p)
372{
373 size_t ret = 1;
374 while (*p!=0) {
375 ret++,++p;
376 }
377 return ret*2;
378}
379static void duplicate_ppstrings (int ac, wchar_t ***av)
380{
381 wchar_t **avl;
382 int i;
383 wchar_t **n = (wchar_t **) malloc (sizeof (wchar_t *) * (ac + 1));
384
385 avl=*av;
386 for (i=0; i < ac; i++)
387 {
388 size_t l = wbytelen (avl[i]);
389 n[i] = (wchar_t *) malloc (l);
390 memcpy (n[i], avl[i], l);
391 }
392 n[i] = NULL;
393 *av = n;
394}
395#else
396static void duplicate_ppstrings (int ac, char ***av)
397{
398 char **avl;
399 int i;
400 char **n = (char **) malloc (sizeof (char *) * (ac + 1));
401
402 avl=*av;
403 for (i=0; i < ac; i++)
404 {
405 size_t l = strlen (avl[i]) + 1;
406 n[i] = (char *) malloc (l);
407 memcpy (n[i], avl[i], l);
408 }
409 n[i] = NULL;
410 *av = n;
411}
412#endif
413
414#ifdef __MINGW_SHOW_INVALID_PARAMETER_EXCEPTION
415#define __UNUSED_PARAM_1(x) x
416#else
417#define __UNUSED_PARAM_1 __UNUSED_PARAM
418#endif
419static void __cdecl
420__mingw_invalidParameterHandler (const wchar_t * __UNUSED_PARAM_1(expression),
421 const wchar_t * __UNUSED_PARAM_1(function),
422 const wchar_t * __UNUSED_PARAM_1(file),
423 unsigned int __UNUSED_PARAM_1(line),
424 uintptr_t __UNUSED_PARAM(pReserved))
425{
426#ifdef __MINGW_SHOW_INVALID_PARAMETER_EXCEPTION
427 wprintf(L"Invalid parameter detected in function %s. File: %s Line: %u\n", function, file, line);
428 wprintf(L"Expression: %s\n", expression);
429#endif
430}
431
432HANDLE __mingw_get_msvcrt_handle(void);
433
434static void __cdecl
435__mingw_prepare_except_for_msvcr80_and_higher (void)
436{
437 _invalid_parameter_handler (*fIPH)(_invalid_parameter_handler) = NULL;
438
439 fIPH = (void*)GetProcAddress (__mingw_get_msvcrt_handle(), "_set_invalid_parameter_handler");
440 if (fIPH)
441 (*fIPH)(__mingw_invalidParameterHandler);
442}
__cdecl
#define __cdecl
Definition: accygwin.h:79
_CRTIMP
#define _CRTIMP
Definition: crtdefs.h:72
__winitenv
_CRTIMP wchar_t ** __winitenv
Definition: environ.c:25
_fpreset
void __cdecl _fpreset(void)
Definition: _fpreset.c:10
__ImageBase
IMAGE_DOS_HEADER __ImageBase
__initenv
_CRTIMP char ** __initenv
Definition: environ.c:24
sect_attribs.h
_IMAGE_DOS_HEADER
Definition: ntddk_ex.h:99