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/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 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>
#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);
#if defined(__x86_64__) && !defined(_MSC_VER) && !defined(__SEH__)
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;
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;
}
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