mingw-w64-crt/crt/crt_handler.c - mingw-w64 - Git at Google

 /**
  * This file has no copyright assigned and is placed in the Public Domain.
  * This file is part of the w64 mingw-runtime package.
  * No warranty is given; refer to the file DISCLAIMER.PD within this package.
  */

 #include <windows.h>
 #include <excpt.h>
 #include <string.h>
 #include <stdlib.h>
 #include <malloc.h>
 #include <memory.h>
 #include <signal.h>
 #include <stdio.h>

 #if defined (_WIN64) && defined (__ia64__)
 #error FIXME: Unsupported __ImageBase implementation.
 #else
 #define __ImageBase __MINGW_LSYMBOL(_image_base__)
 /* This symbol is defined by the linker.  */
 extern IMAGE_DOS_HEADER __ImageBase;
 #endif

 #pragma pack(push,1)
 typedef struct _UNWIND_INFO {
   BYTE VersionAndFlags;
   BYTE PrologSize;
   BYTE CountOfUnwindCodes;
   BYTE FrameRegisterAndOffset;
   ULONG AddressOfExceptionHandler;
 } UNWIND_INFO,*PUNWIND_INFO;
 #pragma pack(pop)

 PIMAGE_SECTION_HEADER _FindPESectionByName (const char *);
 PIMAGE_SECTION_HEADER _FindPESectionExec (size_t);
 PBYTE _GetPEImageBase (void);

 int __mingw_init_ehandler (void);
 extern void _fpreset (void);

 #ifdef _WIN64
 EXCEPTION_DISPOSITION __mingw_SEH_error_handler(struct _EXCEPTION_RECORD *, void *, struct _CONTEXT *, void *);

 #define MAX_PDATA_ENTRIES 32
 static RUNTIME_FUNCTION emu_pdata[MAX_PDATA_ENTRIES];
 static UNWIND_INFO emu_xdata[MAX_PDATA_ENTRIES];

 int
 __mingw_init_ehandler (void)
 {
   static int was_here = 0;
   size_t e = 0;
   PIMAGE_SECTION_HEADER pSec;
   PBYTE _ImageBase = _GetPEImageBase ();

   if (was_here || !_ImageBase)
     return was_here;
   was_here = 1;
   if (_FindPESectionByName (".pdata") != NULL)
     return 1;

   /* Allocate # of e tables and entries.  */
   memset (emu_pdata, 0, sizeof (RUNTIME_FUNCTION) * MAX_PDATA_ENTRIES);
   memset (emu_xdata, 0, sizeof (UNWIND_INFO) * MAX_PDATA_ENTRIES);

   e = 0;
   /* Fill tables and entries.  */
   while (e < MAX_PDATA_ENTRIES && (pSec = _FindPESectionExec (e)) != NULL)
     {
       emu_xdata[e].VersionAndFlags = 9; /* UNW_FLAG_EHANDLER | UNW_VERSION */
       emu_xdata[e].AddressOfExceptionHandler =
 	(DWORD)(size_t) ((LPBYTE)__mingw_SEH_error_handler - _ImageBase);
       emu_pdata[e].BeginAddress = pSec->VirtualAddress;
       emu_pdata[e].EndAddress = pSec->VirtualAddress + pSec->Misc.VirtualSize;
       emu_pdata[e].UnwindData =
 	(DWORD)(size_t)((LPBYTE)&emu_xdata[e] - _ImageBase);
       ++e;
     }
 #ifdef _DEBUG_CRT
   if (!e || e > MAX_PDATA_ENTRIES)
     abort ();
 #endif
   /* RtlAddFunctionTable.  */
   if (e != 0)
     RtlAddFunctionTable (emu_pdata, e, (DWORD64)_ImageBase);
   return 1;
 }

 extern void _fpreset (void);

 EXCEPTION_DISPOSITION
 __mingw_SEH_error_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
 			   void *EstablisherFrame  __attribute__ ((unused)),
 			   struct _CONTEXT* ContextRecord __attribute__ ((unused)),
 			   void *DispatcherContext __attribute__ ((unused)))
 {
   EXCEPTION_DISPOSITION action = ExceptionContinueSearch; /* EXCEPTION_CONTINUE_SEARCH; */
   void (*old_handler) (int);
   int reset_fpu = 0;

   switch (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 = 0; //EXCEPTION_CONTINUE_EXECUTION;
 	}
       else if (old_handler != SIG_DFL)
 	{
 	  /* This means 'old' is a user defined function. Call it */
 	  (*old_handler) (SIGSEGV);
 	  action = 0; // EXCEPTION_CONTINUE_EXECUTION;
 	}
       else
         action = 4; /* EXCEPTION_EXECUTE_HANDLER; */
       break;
     case EXCEPTION_ILLEGAL_INSTRUCTION:
     case EXCEPTION_PRIV_INSTRUCTION:
       /* test if the user has set SIGILL */
       old_handler = signal (SIGILL, SIG_DFL);
       if (old_handler == SIG_IGN)
 	{
 	  /* this is undefined if the signal was raised by anything other
 	     than raise ().  */
 	  signal (SIGILL, SIG_IGN);
 	  action = 0; // EXCEPTION_CONTINUE_EXECUTION;
 	}
       else if (old_handler != SIG_DFL)
 	{
 	  /* This means 'old' is a user defined function. Call it */
 	  (*old_handler) (SIGILL);
 	  action = 0; // EXCEPTION_CONTINUE_EXECUTION;
 	}
       else
         action = 4; /* EXCEPTION_EXECUTE_HANDLER;*/
       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 = 0; // EXCEPTION_CONTINUE_EXECUTION;
 	}
       else if (old_handler != SIG_DFL)
 	{
 	  /* This means 'old' is a user defined function. Call it */
 	  (*old_handler) (SIGFPE);
 	  action = 0; // EXCEPTION_CONTINUE_EXECUTION;
 	}
       break;
     case EXCEPTION_DATATYPE_MISALIGNMENT:
     case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
     case EXCEPTION_FLT_STACK_CHECK:
     case EXCEPTION_INT_OVERFLOW:
     case EXCEPTION_INVALID_HANDLE:
     /*case EXCEPTION_POSSIBLE_DEADLOCK: */
       action = 0; // EXCEPTION_CONTINUE_EXECUTION;
       break;
     default:
       break;
     }
   return action;
 }

 #endif

 LPTOP_LEVEL_EXCEPTION_FILTER __mingw_oldexcpt_handler = NULL;

 long CALLBACK
 _gnu_exception_handler (EXCEPTION_POINTERS *exception_data);

 #define GCC_MAGIC (('G' << 16) | ('C' << 8) | 'C' | (1U << 29))

 long CALLBACK
 _gnu_exception_handler (EXCEPTION_POINTERS *exception_data)
 {
   void (*old_handler) (int);
   long action = EXCEPTION_CONTINUE_SEARCH;
   int reset_fpu = 0;

 #ifdef __SEH__
   if ((exception_data->ExceptionRecord->ExceptionCode & 0x20ffffff) == GCC_MAGIC)
     {
       if ((exception_data->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE) == 0)
         return EXCEPTION_CONTINUE_EXECUTION;
     }
 #endif

   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_ILLEGAL_INSTRUCTION:
     case EXCEPTION_PRIV_INSTRUCTION:
       /* test if the user has set SIGILL */
       old_handler = signal (SIGILL, SIG_DFL);
       if (old_handler == SIG_IGN)
 	{
 	  /* this is undefined if the signal was raised by anything other
 	     than raise ().  */
 	  signal (SIGILL, SIG_IGN);
 	  action = EXCEPTION_CONTINUE_EXECUTION;
 	}
       else if (old_handler != SIG_DFL)
 	{
 	  /* This means 'old' is a user defined function. Call it */
 	  (*old_handler) (SIGILL);
 	  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;
 #ifdef _WIN64
     case EXCEPTION_DATATYPE_MISALIGNMENT:
     case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
     case EXCEPTION_FLT_STACK_CHECK:
     case EXCEPTION_INT_OVERFLOW:
     case EXCEPTION_INVALID_HANDLE:
     /*case EXCEPTION_POSSIBLE_DEADLOCK: */
       action = EXCEPTION_CONTINUE_EXECUTION;
       break;
 #endif
     default:
       break;
     }

   if (action == EXCEPTION_CONTINUE_SEARCH && __mingw_oldexcpt_handler)
     action = (*__mingw_oldexcpt_handler)(exception_data);
   return action;
 }
	/**
	* This file has no copyright assigned and is placed in the Public Domain.
	* This file is part of the w64 mingw-runtime package.
	* No warranty is given; refer to the file DISCLAIMER.PD within this package.
	*/

	#include <windows.h>
	#include <excpt.h>
	#include <string.h>
	#include <stdlib.h>
	#include <malloc.h>
	#include <memory.h>
	#include <signal.h>
	#include <stdio.h>

	#if defined (_WIN64) && defined (__ia64__)
	#error FIXME: Unsupported __ImageBase implementation.
	#else
	#define __ImageBase __MINGW_LSYMBOL(_image_base__)
	/* This symbol is defined by the linker. */
	extern IMAGE_DOS_HEADER __ImageBase;
	#endif

	#pragma pack(push,1)
	typedef struct _UNWIND_INFO {
	BYTE VersionAndFlags;
	BYTE PrologSize;
	BYTE CountOfUnwindCodes;
	BYTE FrameRegisterAndOffset;
	ULONG AddressOfExceptionHandler;
	} UNWIND_INFO,*PUNWIND_INFO;
	#pragma pack(pop)

	PIMAGE_SECTION_HEADER _FindPESectionByName (const char *);
	PIMAGE_SECTION_HEADER _FindPESectionExec (size_t);
	PBYTE _GetPEImageBase (void);

	int __mingw_init_ehandler (void);
	extern void _fpreset (void);

	#ifdef _WIN64
	EXCEPTION_DISPOSITION __mingw_SEH_error_handler(struct _EXCEPTION_RECORD , void , struct _CONTEXT , void );

	#define MAX_PDATA_ENTRIES 32
	static RUNTIME_FUNCTION emu_pdata[MAX_PDATA_ENTRIES];
	static UNWIND_INFO emu_xdata[MAX_PDATA_ENTRIES];

	int
	__mingw_init_ehandler (void)
	{
	static int was_here = 0;
	size_t e = 0;
	PIMAGE_SECTION_HEADER pSec;
	PBYTE _ImageBase = _GetPEImageBase ();

	if (was_here \|\| !_ImageBase)
	return was_here;
	was_here = 1;
	if (_FindPESectionByName (".pdata") != NULL)
	return 1;

	/* Allocate # of e tables and entries. */
	memset (emu_pdata, 0, sizeof (RUNTIME_FUNCTION) * MAX_PDATA_ENTRIES);
	memset (emu_xdata, 0, sizeof (UNWIND_INFO) * MAX_PDATA_ENTRIES);

	e = 0;
	/* Fill tables and entries. */
	while (e < MAX_PDATA_ENTRIES && (pSec = _FindPESectionExec (e)) != NULL)
	{
	emu_xdata[e].VersionAndFlags = 9; /* UNW_FLAG_EHANDLER \| UNW_VERSION */
	emu_xdata[e].AddressOfExceptionHandler =
	(DWORD)(size_t) ((LPBYTE)__mingw_SEH_error_handler - _ImageBase);
	emu_pdata[e].BeginAddress = pSec->VirtualAddress;
	emu_pdata[e].EndAddress = pSec->VirtualAddress + pSec->Misc.VirtualSize;
	emu_pdata[e].UnwindData =
	(DWORD)(size_t)((LPBYTE)&emu_xdata[e] - _ImageBase);
	++e;
	}
	#ifdef _DEBUG_CRT
	if (!e \|\| e > MAX_PDATA_ENTRIES)
	abort ();
	#endif
	/* RtlAddFunctionTable. */
	if (e != 0)
	RtlAddFunctionTable (emu_pdata, e, (DWORD64)_ImageBase);
	return 1;
	}

	extern void _fpreset (void);

	EXCEPTION_DISPOSITION
	__mingw_SEH_error_handler (struct _EXCEPTION_RECORD* ExceptionRecord,
	void *EstablisherFrame __attribute__ ((unused)),
	struct _CONTEXT* ContextRecord __attribute__ ((unused)),
	void *DispatcherContext __attribute__ ((unused)))
	{
	EXCEPTION_DISPOSITION action = ExceptionContinueSearch; /* EXCEPTION_CONTINUE_SEARCH; */
	void (*old_handler) (int);
	int reset_fpu = 0;

	switch (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 = 0; //EXCEPTION_CONTINUE_EXECUTION;
	}
	else if (old_handler != SIG_DFL)
	{
	/* This means 'old' is a user defined function. Call it */
	(*old_handler) (SIGSEGV);
	action = 0; // EXCEPTION_CONTINUE_EXECUTION;
	}
	else
	action = 4; /* EXCEPTION_EXECUTE_HANDLER; */
	break;
	case EXCEPTION_ILLEGAL_INSTRUCTION:
	case EXCEPTION_PRIV_INSTRUCTION:
	/* test if the user has set SIGILL */
	old_handler = signal (SIGILL, SIG_DFL);
	if (old_handler == SIG_IGN)
	{
	/* this is undefined if the signal was raised by anything other
	than raise (). */
	signal (SIGILL, SIG_IGN);
	action = 0; // EXCEPTION_CONTINUE_EXECUTION;
	}
	else if (old_handler != SIG_DFL)
	{
	/* This means 'old' is a user defined function. Call it */
	(*old_handler) (SIGILL);
	action = 0; // EXCEPTION_CONTINUE_EXECUTION;
	}
	else
	action = 4; /* EXCEPTION_EXECUTE_HANDLER;*/
	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 = 0; // EXCEPTION_CONTINUE_EXECUTION;
	}
	else if (old_handler != SIG_DFL)
	{
	/* This means 'old' is a user defined function. Call it */
	(*old_handler) (SIGFPE);
	action = 0; // EXCEPTION_CONTINUE_EXECUTION;
	}
	break;
	case EXCEPTION_DATATYPE_MISALIGNMENT:
	case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
	case EXCEPTION_FLT_STACK_CHECK:
	case EXCEPTION_INT_OVERFLOW:
	case EXCEPTION_INVALID_HANDLE:
	/case EXCEPTION_POSSIBLE_DEADLOCK: /
	action = 0; // EXCEPTION_CONTINUE_EXECUTION;
	break;
	default:
	break;
	}
	return action;
	}

	#endif

	LPTOP_LEVEL_EXCEPTION_FILTER __mingw_oldexcpt_handler = NULL;

	long CALLBACK
	_gnu_exception_handler (EXCEPTION_POINTERS *exception_data);

	#define GCC_MAGIC (('G' << 16) \| ('C' << 8) \| 'C' \| (1U << 29))

	long CALLBACK
	_gnu_exception_handler (EXCEPTION_POINTERS *exception_data)
	{
	void (*old_handler) (int);
	long action = EXCEPTION_CONTINUE_SEARCH;
	int reset_fpu = 0;

	#ifdef __SEH__
	if ((exception_data->ExceptionRecord->ExceptionCode & 0x20ffffff) == GCC_MAGIC)
	{
	if ((exception_data->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE) == 0)
	return EXCEPTION_CONTINUE_EXECUTION;
	}
	#endif

	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_ILLEGAL_INSTRUCTION:
	case EXCEPTION_PRIV_INSTRUCTION:
	/* test if the user has set SIGILL */
	old_handler = signal (SIGILL, SIG_DFL);
	if (old_handler == SIG_IGN)
	{
	/* this is undefined if the signal was raised by anything other
	than raise (). */
	signal (SIGILL, SIG_IGN);
	action = EXCEPTION_CONTINUE_EXECUTION;
	}
	else if (old_handler != SIG_DFL)
	{
	/* This means 'old' is a user defined function. Call it */
	(*old_handler) (SIGILL);
	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;
	#ifdef _WIN64
	case EXCEPTION_DATATYPE_MISALIGNMENT:
	case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
	case EXCEPTION_FLT_STACK_CHECK:
	case EXCEPTION_INT_OVERFLOW:
	case EXCEPTION_INVALID_HANDLE:
	/case EXCEPTION_POSSIBLE_DEADLOCK: /
	action = EXCEPTION_CONTINUE_EXECUTION;
	break;
	#endif
	default:
	break;
	}

	if (action == EXCEPTION_CONTINUE_SEARCH && __mingw_oldexcpt_handler)
	action = (*__mingw_oldexcpt_handler)(exception_data);
	return action;
	}