diff options
Diffstat (limited to 'mkspecs/win32-g++/qtcrtentrypoint.cpp')
| -rw-r--r-- | mkspecs/win32-g++/qtcrtentrypoint.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/mkspecs/win32-g++/qtcrtentrypoint.cpp b/mkspecs/win32-g++/qtcrtentrypoint.cpp new file mode 100644 index 000000000..3d047e8a7 --- /dev/null +++ b/mkspecs/win32-g++/qtcrtentrypoint.cpp @@ -0,0 +1,231 @@ + +//This code is need to get the WinMain function called. Current MinGW runtimes tries to call main +//before WinMain. Untill such time as MinGw runtime has been changed this is need. +//Most of this code is taken from the MinGw runtime sources. + + +#include <signal.h> +#include <process.h> +#include <float.h> +#include <io.h> + + +/* + * Setup the default file handles to have the _CRT_fmode mode, as well as + * any new files created by the user. + */ + +extern int _fmode; +extern "C" int* __p__fmode(void); /* To access the dll _fmode */ +extern int _CRT_fmode; + +static void _mingw32_init_fmode () +{ + /* Don't set the std file mode if the user hasn't set any value for it. */ + if (_CRT_fmode) + { + _fmode = _CRT_fmode; + + /* + * This overrides the default file mode settings for stdin, + * stdout and stderr. At first I thought you would have to + * test with isatty, but it seems that the DOS console at + * least is smart enough to handle _O_BINARY stdout and + * still display correctly. + */ + if (stdin) + { + _setmode (_fileno (stdin), _CRT_fmode); + } + if (stdout) + { + _setmode (_fileno (stdout), _CRT_fmode); + } + if (stderr) + { + _setmode (_fileno (stderr), _CRT_fmode); + } + } + + /* Now sync the dll _fmode to the one for this .exe. */ + *__p__fmode() = _fmode; + +} + +/* This function will be called when a trap occurs. Thanks to Jacob + Navia for his contribution. */ +static CALLBACK long _gnu_exception_handler (EXCEPTION_POINTERS * exception_data) +{ + void (*old_handler) (int); + long action = EXCEPTION_CONTINUE_SEARCH; + int reset_fpu = 0; + + switch (exception_data->ExceptionRecord->ExceptionCode) + { + case EXCEPTION_ACCESS_VIOLATION: + /* test if the user has set SIGSEGV */ + old_handler = signal (SIGSEGV, SIG_DFL); + if (old_handler == SIG_IGN) + { + /* this is undefined if the signal was raised by anything other + than raise (). */ + signal (SIGSEGV, SIG_IGN); + action = EXCEPTION_CONTINUE_EXECUTION; + } + else if (old_handler != SIG_DFL) + { + /* This means 'old' is a user defined function. Call it */ + (*old_handler) (SIGSEGV); + action = EXCEPTION_CONTINUE_EXECUTION; + } + break; + + case EXCEPTION_FLT_INVALID_OPERATION: + case EXCEPTION_FLT_DIVIDE_BY_ZERO: + case EXCEPTION_FLT_DENORMAL_OPERAND: + case EXCEPTION_FLT_OVERFLOW: + case EXCEPTION_FLT_UNDERFLOW: + case EXCEPTION_FLT_INEXACT_RESULT: + reset_fpu = 1; + /* fall through. */ + + case EXCEPTION_INT_DIVIDE_BY_ZERO: + /* test if the user has set SIGFPE */ + old_handler = signal (SIGFPE, SIG_DFL); + if (old_handler == SIG_IGN) + { + signal (SIGFPE, SIG_IGN); + if (reset_fpu) + _fpreset (); + action = EXCEPTION_CONTINUE_EXECUTION; + } + else if (old_handler != SIG_DFL) + { + /* This means 'old' is a user defined function. Call it */ + (*old_handler) (SIGFPE); + action = EXCEPTION_CONTINUE_EXECUTION; + } + break; + + default: + break; + } + return action; +} + + +extern char __RUNTIME_PSEUDO_RELOC_LIST__; +extern char __RUNTIME_PSEUDO_RELOC_LIST_END__; +extern char _image_base__; + +typedef struct { + DWORD addend; + DWORD target; +} runtime_pseudo_reloc; + +static void do_pseudo_reloc (void* start, void* end, void* base) +{ + DWORD reloc_target; + runtime_pseudo_reloc* r; + for (r = (runtime_pseudo_reloc*) start; r < (runtime_pseudo_reloc*) end; r++) { + reloc_target = (DWORD) base + r->target; + *((DWORD*) reloc_target) += r->addend; + } +} + +void _pei386_runtime_relocator () +{ + do_pseudo_reloc (&__RUNTIME_PSEUDO_RELOC_LIST__, + &__RUNTIME_PSEUDO_RELOC_LIST_END__, + &_image_base__); +} + + +#ifdef __MSVCRT__ +#define __UNKNOWN_APP 0 +#define __CONSOLE_APP 1 +#define __GUI_APP 2 +extern "C" void __set_app_type(int); +#endif /* __MSVCRT__ */ + +#define ISSPACE(a) (a == ' ' || a == '\t') + +int TQtWinMainCRTStartup() +{ +#ifdef __MSVCRT__ + __set_app_type (__GUI_APP); +#endif + + SetUnhandledExceptionFilter (_gnu_exception_handler); + + /* + * Initialize floating point unit. + */ + _fpreset (); /* Supplied by the runtime library. */ + + /* + * Sets the default file mode. + * If _CRT_fmode is set, also set mode for stdin, stdout + * and stderr, as well + * NOTE: DLLs don't do this because that would be rude! + */ + _mingw32_init_fmode (); + + /* Adust references to dllimported data that have non-zero offsets. */ + _pei386_runtime_relocator (); + + char *szCmd; + STARTUPINFO startinfo; + int nRet; + + /* Get the command line passed to the process. */ + szCmd = GetCommandLineA (); + GetStartupInfo (&startinfo); + + /* Strip off the name of the application and any leading + * whitespace. */ + if (szCmd) { + + while (ISSPACE (*szCmd)) { + szCmd++; + } + + /* On my system I always get the app name enclosed + * in quotes... */ + if (*szCmd == '\"') { + do { + szCmd++; + } while (*szCmd != '\"' && *szCmd != '\0'); + + if (*szCmd == '\"') { + szCmd++; + } + } else { + /* If no quotes then assume first token is program + * name. */ + while (!ISSPACE (*szCmd) && *szCmd != '\0') { + szCmd++; + } + } + + while (ISSPACE (*szCmd)) { + szCmd++; + } + } + + nRet = WinMain (GetModuleHandle (NULL), NULL, szCmd, + (startinfo.dwFlags & STARTF_USESHOWWINDOW) ? + startinfo.wShowWindow : SW_SHOWDEFAULT); + + /* + * Perform exit processing for the C library. This means + * flushing output and calling 'atexit' registered functions. + */ + _cexit (); + + ExitProcess (nRet); + + return 0; + +} + |