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windows-nt-4.0/private/sdktools/vctools/crt/crtw32/dllstuff/crtexe.c

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/***
*crtexe.c - Initialization for client EXE using CRT DLL (Win32, Dosx32)
*
* Copyright (c) 1991-1995, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Set up call to client's main() or WinMain().
*
*Revision History:
* 08-12-91 GJF Module created.
* 01-05-92 GJF Substantially revised
* 01-17-92 GJF Restored Stevewo's scheme for unhandled exceptions.
* 01-29-92 GJF Added support for linked-in options (equivalents of
* binmode.obj, commode.obj and setargv.obj).
* 04-17-92 SKS Add call to _initterm() to do C++ constructors (I386)
* 08-01-92 SRW winxcpt.h replaced bu excpt.h which is included by oscalls.h
* 09-16-92 SKS Prepare for C8 C++ for MIPS by calling C++ constructors
* 04-02-93 SKS Change try/except to __try/__except
* 04-06-93 SKS Replace _CRTAPI* with _cdecl
* Change __GetMainArgs to __getmainargs
* Change fmode/commode implementation to reflect the
* the change to _declspec(dllimport) for imported data.
* 04-12-93 CFW Added xia..xiz initializers and initializer call.
* 04-26-93 GJF Made lpszCommandLine (unsigned char *) to deal with
* chars > 127 in the command line.
* 04-27-93 GJF Removed support for _RT_STACK, _RT_INTDIV,
* _RT_INVALDISP and _RT_NONCONT.
* 05-14-93 GJF Added support for quoted program names.
* 05-24-93 SKS Add support for special versions of _onexit/atexit
* which do one thing for EXE's and another for DLLs.
* 10-19-93 CFW MIPS support for _imp__xxx.
* 10-21-93 GJF Added support for NT's crtdll.dll.
* 11-08-93 GJF Guard the initialization code with the __try -
* __except statement (esp., C++ constructors for static
* objects).
* 11-09-93 GJF Replaced PF with _PVFV (defined in internal.h).
* 11-23-93 CFW Wide char enable.
* 12-07-93 CFW Change _TCHAR to _TSCHAR.
* 01-04-94 CFW Pass copy of environment to main.
* 01-11-94 GJF Call __GetMainArgs instead of __getmainargs for NT
* SDK build (same function, different name)
* 01-28-94 CFW Move environment copying to setenv.c.
* 03-04-94 SKS Remove __setargv from this module to avoid link-time
* problems compiling -MD and linking with setargv.obj.
* static _dowildcard becomes an extern. Add another
* parameter to _*getmainargs (_newmode).
* NOTE: These channges do NOT apply to the _NTSDK.
* 03-28-94 SKS Add call to _setdefaultprecision for X86 (not _NTSDK)
* 04-01-94 GJF Moved declaration of __[w]initenv to internal.h.
* 04-06-94 GJF _IMP___FMODE, _IMP___COMMODE now evaluate to
* dereferences of function returns for _M_IX86 (for
* compatability with Win32s version of msvcrt*.dll).
* 04-25-94 CFW wWinMain has Unicode args.
* 05-16-94 SKS Get StartupInfo to give correct nCmdShow parameter
* to (_w)WinMain() (was ALWAYS passing SW_SHOWDEFAULT).
* 08-04-94 GJF Added support for user-supplied _matherr routine
* 09-06-94 GJF Added code to set __app_type properly.
* 10-04-94 BWT Fix _NTSDK build
* 02-22-95 JWM Spliced in PMAC code.
* 05-24-95 CFW Official ANSI C++ new handler added.
* 07-24-95 CFW Change PMac onexit malloc to _malloc_crt.
*
*******************************************************************************/
#ifdef _WIN32
#ifdef CRTDLL
/*
* SPECIAL BUILD MACROS! Note that crtexe.c (and crtexew.c) is linked in with
* the client's code. It does not go into crtdll.dll! Therefore, it must be
* built under the _DLL switch (like user code) and CRTDLL must be undefined.
* The symbol SPECIAL_CRTEXE is turned on to suppress the normal CRT DLL
* definition of _fmode and _commode using __declspec(dllexport). Otherwise
* this module would not be able to refer to both the local and DLL versions
* of these two variables.
*/
#undef CRTDLL
#define _DLL
#define SPECIAL_CRTEXE
#include <cruntime.h>
#include <oscalls.h>
#include <internal.h>
#include <math.h>
#include <rterr.h>
#include <stdlib.h>
#include <tchar.h>
/*
* wWinMain is not yet defined in winbase.h. When it is, this should be
* removed.
*/
int
WINAPI
wWinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPWSTR lpCmdLine,
int nShowCmd
);
#define SPACECHAR _T(' ')
#define DQUOTECHAR _T('\"')
#ifdef _M_IX86
/*
* The local copy of the Pentium FDIV adjustment flag
* and the address of the flag in MSVCRT*.DLL.
*/
extern int _adjust_fdiv;
extern int * _imp___adjust_fdiv;
#endif
/* default floating point precision - X86 only! */
#ifndef _NTSDK
#ifdef _M_IX86
extern void _setdefaultprecision();
#endif
#endif
/*
* Declare function used to install a user-supplied _matherr routine.
*/
#ifndef _NTSDK
_CRTIMP void __setusermatherr( int (__cdecl *)(struct _exception *) );
#endif
/*
* Declare the names of the exports corresponding to _fmode and _commode
*/
#ifdef _NTSDK
#define _IMP___FMODE _fmode_dll
#define _IMP___COMMODE _commode_dll
#else /* ndef _NTSDK */
#ifdef _M_IX86
#define _IMP___FMODE (__p__fmode())
#define _IMP___COMMODE (__p__commode())
#else /* ndef _M_IX86 */
/* assumed to be MIPS or Alpha */
#define _IMP___FMODE __imp__fmode
#define _IMP___COMMODE __imp__commode
#endif /* _M_IX86 */
#endif /* _NTSDK */
#if !defined(_M_IX86) || defined(_NTSDK)
extern int * _IMP___FMODE; /* exported from the CRT DLL */
extern int * _IMP___COMMODE; /* these names are implementation-specific */
#endif
extern int _fmode; /* must match the definition in <stdlib.h> */
extern int _commode; /* must match the definition in <internal.h> */
#ifdef _NTSDK
static int _dowildcard = 0; /* passed to __GetMainArgs() */
#else
extern int _dowildcard; /* passed to __getmainargs() */
#endif
/*
* Declare/define communal that serves as indicator the default matherr
* routine is being used.
*/
#ifndef _NTSDK
int __defaultmatherr;
#endif
/*
* routine in DLL to do initialization (in this case, C++ constructors)
*/
extern void __cdecl _initterm(_PVFV *, _PVFV *);
/*
* pointers to initialization sections
*/
extern _PVFV __xi_a[], __xi_z[]; /* C++ initializers */
extern _PVFV __xc_a[], __xc_z[]; /* C++ initializers */
/*
* Pointers to beginning and end of the table of function pointers manipulated
* by _onexit()/atexit(). The atexit/_onexit code is shared for both EXE's and
* DLL's but different behavior is required. These values are set to -1 to
* mark this module as an EXE.
*/
extern _PVFV *__onexitbegin;
extern _PVFV *__onexitend;
/***
*void mainCRTStartup(void)
*
*Purpose:
* This routine does the C runtime initialization, calls main(), and
* then exits. It never returns.
*
*Entry:
*
*Exit:
*
*******************************************************************************/
#ifdef _WINMAIN_
#ifdef WPRFLAG
void wWinMainCRTStartup(
#else
void WinMainCRTStartup(
#endif
#else /* _WINMAIN_ */
#ifdef WPRFLAG
void wmainCRTStartup(
#else
void mainCRTStartup(
#endif
#endif /* _WINMAIN_ */
void
)
{
int argc; /* three standard arguments to main */
_TSCHAR **argv;
_TSCHAR **envp;
int mainret;
#ifdef _WINMAIN_
_TUCHAR *lpszCommandLine;
STARTUPINFO StartupInfo;
#endif
#if defined(WPRFLAG) || !defined(_NTSDK)
_startupinfo startinfo;
#endif
/*
* Guard the initialization code and the call to user's main, or
* WinMain, function in a __try/__except statement.
*/
__try {
/*
* Set __app_type properly
*/
#ifdef _WINMAIN_
__set_app_type(_GUI_APP);
#else
__set_app_type(_CONSOLE_APP);
#endif
/*
* Mark this module as an EXE file so that atexit/_onexit
* will do the right thing when called, including for C++
* d-tors.
*/
__onexitbegin = __onexitend = (_PVFV *)(-1);
/*
* Propogate the _fmode and _commode variables to the DLL
*/
*_IMP___FMODE = _fmode;
*_IMP___COMMODE = _commode;
#ifdef _M_IX86
/*
* Set the local copy of the Pentium FDIV adjustment flag
*/
_adjust_fdiv = * _imp___adjust_fdiv;
#endif
/*
* Call _setargv(), which will call the __setargv() in this
* module if SETARGV.OBJ is linked with the EXE. If
* SETARGV.OBJ is not linked with the EXE, a _dummy setargv()
* will be called.
*/
#ifdef WPRFLAG
_wsetargv();
#else
_setargv();
#endif
#ifndef _NTSDK
/*
* If the user has supplied a _matherr routine then set
* __pusermatherr to point to it.
*/
if ( !__defaultmatherr )
__setusermatherr(_matherr);
#ifdef _M_IX86
_setdefaultprecision();
#endif
#endif
/*
* Do runtime startup initializers.
*/
_initterm( __xi_a, __xi_z );
/*
* Get the arguments for the call to main. Note this must be
* done explicitly, rather than as part of the dll's
* initialization, to implement optional expansion of wild
* card chars in filename args
*/
#ifdef WPRFLAG
startinfo.newmode = _newmode;
#ifdef ANSI_NEW_HANDLER
startinfo.newh = _defnewh;
#endif /* ANSI_NEW_HANDLER */
__wgetmainargs(&argc, &argv, &envp, _dowildcard, &startinfo);
#else
#ifdef _NTSDK
__GetMainArgs(&argc, &argv, &envp, _dowildcard);
#else
startinfo.newmode = _newmode;
#ifdef ANSI_NEW_HANDLER
startinfo.newh = _defnewh;
#endif /* ANSI_NEW_HANDLER */
__getmainargs(&argc, &argv, &envp, _dowildcard, &startinfo);
#endif
#endif
/*
* do C++ constructors (initializers) specific to this EXE
*/
_initterm( __xc_a, __xc_z );
#ifdef _WINMAIN_
/*
* Skip past program name (first token in command line).
* Check for and handle quoted program name.
*/
#ifdef WPRFLAG
/* OS may not support "W" flavors */
if (_wcmdln == NULL)
return;
lpszCommandLine = (wchar_t *)_wcmdln;
#else
lpszCommandLine = (unsigned char *)_acmdln;
#endif
if ( *lpszCommandLine == DQUOTECHAR ) {
/*
* Scan, and skip over, subsequent characters until
* another double-quote or a null is encountered.
*/
while ( *++lpszCommandLine && (*lpszCommandLine
!= DQUOTECHAR) );
/*
* If we stopped on a double-quote (usual case), skip
* over it.
*/
if ( *lpszCommandLine == DQUOTECHAR )
lpszCommandLine++;
}
else {
while (*lpszCommandLine > SPACECHAR)
lpszCommandLine++;
}
/*
* Skip past any white space preceeding the second token.
*/
while (*lpszCommandLine && (*lpszCommandLine <= SPACECHAR)) {
lpszCommandLine++;
}
StartupInfo.dwFlags = 0;
GetStartupInfo( &StartupInfo );
#ifdef WPRFLAG
mainret = wWinMain(
#else
mainret = WinMain(
#endif
GetModuleHandle(NULL),
NULL,
lpszCommandLine,
StartupInfo.dwFlags & STARTF_USESHOWWINDOW
? StartupInfo.wShowWindow
: SW_SHOWDEFAULT
);
#else /* _WINMAIN_ */
#ifdef WPRFLAG
__winitenv = envp;
mainret = wmain(argc, argv, envp);
#else
__initenv = envp;
mainret = main(argc, argv, envp);
#endif
#endif /* _WINMAIN_ */
exit(mainret);
}
__except ( _XcptFilter(GetExceptionCode(), GetExceptionInformation()) )
{
/*
* Should never reach here
*/
_exit( GetExceptionCode() );
} /* end of try - except */
}
#ifdef _NTSDK
/***
*__setargv - dummy version (for wildcard expansion) for CRTDLL.DLL model only
*
*Purpose:
* If the EXE that is linked with CRTDLL.LIB is linked explicitly with
* SETARGV.OBJ, the call to _setargv() in the C Run-Time start-up code
* (above) will call this routine, instead of calling a dummy version of
* _setargv() which will do nothing. This will set to one the static
* variable which is passed to __getmainargs(), thus enabling wildcard
* expansion of the command line arguments.
*
* In the statically-linked C Run-Time models, _setargv() and __setargv()
* are the actual routines that do the work, but this code exists in
* CRTDLL.DLL and so some tricks have to be played to make the same
* SETARGV.OBJ work for EXE's linked with both LIBC.LIB and CRTDLL.LIB.
*
*Entry:
* The static variable _dowildcard is zero (presumably).
*
*Exit:
* The static variable _dowildcard is set to one, meaning that the
* routine __getmainargs() in CRTDLL.DLL *will* do wildcard expansion on
* the command line arguments. (The default behavior is that it won't.)
*
*Exceptions:
*
*******************************************************************************/
#ifdef WPRFLAG
void __cdecl __wsetargv ( void )
#else
void __cdecl __setargv ( void )
#endif
{
_dowildcard = 1;
}
#endif /* _NTSDK */
#endif /* CRTDLL */
#else /* _WIN32 */
#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>
#include <fltintrn.h>
#include <dbgint.h>
/*
* routine in DLL to do initialization (in this case, C++ constructors)
*/
extern void __cdecl _initterm(PFV *, PFV *);
extern void __cdecl _DoExitSpecial(int, int, PFV *, PFV *, PFV *, PFV *, PFV *, PFV *);
static char * _CALLTYPE1 _p2cstr_internal ( unsigned char * str );
static void * memcpy_internal ( void * dst, const void * src, size_t count);
int _CALLTYPE1 main(int, char **, char **); /*generated by compiler*/
void _TestExit(int);
/*
* pointers to initialization functions
*/
extern PFV __xi_a ;
extern PFV __xi_z ;
extern PFV __xc_a ; /* C++ initializers */
extern PFV __xc_z ;
extern PFV __xp_a ; /* C pre-terminators */
extern PFV __xp_z ;
extern PFV __xt_a ; /* C terminators */
extern PFV __xt_z ;
extern PFV *__onexitbegin;
extern PFV *__onexitend;
/*this globals are defined in DLL */
extern int __argc;
extern char **__argv;
/***
*void mainCRTStartup(void)
*
*Purpose:
* This routine does the C runtime initialization, calls main(), and
* then exits. It never returns.
*
*Entry:
*
*Exit:
*
*******************************************************************************/
void mainCRTStartup(
void
)
{
int argc=1; /* three standard arguments to main */
char *argv[2];
char **environ = NULL;
int mainret;
char szPgmName[32];
char *pArg;
extern unsigned int dwSPStartup;
extern void * GetSP(void);
dwSPStartup = (unsigned int)GetSP();
memcpy_internal(szPgmName, (char *)0x910, sizeof(szPgmName));
pArg = _p2cstr_internal(szPgmName);
argv[0] = pArg;
argv[1] = NULL;
__argc = 1;
__argv = argv;
/*
* intialize the global destruction table
*/
if ( (__onexitbegin = (PFV *)_malloc_crt(32 * sizeof(PFV))) == NULL )
{
/*
* cannot allocate minimal required
* size. generate failure to load DLL
* any non-zero value will do...
*/
return;
}
*(__onexitbegin) = (PFV) NULL;
__onexitend = __onexitbegin;
/*
* Do runtime startup initializers.
*/
_initterm( &__xi_a, &__xi_z );
/*
* do C++ constructors (initializers) specific to this EXE
*/
_initterm( &__xc_a, &__xc_z );
mainret = main(argc, argv, environ);
//strictly testing hook
_TestExit(mainret);
/*
* This will do special term for the App in the right order
*/
_DoExitSpecial(mainret, 0, &__xp_a, &__xp_z, &__xt_a, &__xt_z, __onexitbegin, __onexitend );
}
static char * _CALLTYPE1 _p2cstr_internal (
unsigned char * str
)
{
unsigned char *pchSrc;
unsigned char *pchDst;
int cch;
if ( str && *str )
{
pchDst = str;
pchSrc = str + 1;
for ( cch=*pchDst; cch; --cch )
{
*pchDst++ = *pchSrc++;
}
*pchDst = '\0';
}
return( str );
}
static void * memcpy_internal (
void * dst,
const void * src,
size_t count
)
{
void * ret = dst;
/*
* copy from lower addresses to higher addresses
*/
while (count--) {
*(char *)dst = *(char *)src;
dst = (char *)dst + 1;
src = (char *)src + 1;
}
return(ret);
}
#endif /* ndef _WIN32 */