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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
// EXCEPX86.H -
//
// This header file is optionally included from Excep.h if the target platform is x86
//
#ifndef __excepx86_h__
#define __excepx86_h__
#include "corerror.h" // HResults for the COM+ Runtime
#include "../dlls/mscorrc/resource.h"
#define THROW_CONTROL_FOR_THREAD_FUNCTION ThrowControlForThread
#define STATUS_CLR_GCCOVER_CODE STATUS_PRIVILEGED_INSTRUCTION
#ifndef WIN64EXCEPTIONS
class Thread;
#if defined(_MSC_VER)
#pragma warning(disable:4733) // Inline asm assigning to `FS:0` : handler not registered as safe handler
// Actually, the handler getting set is properly registered
#endif
#define INSTALL_SEH_RECORD(record) \
{ \
(record)->Next = (PEXCEPTION_REGISTRATION_RECORD)__readfsdword(0); \
__writefsdword(0, (DWORD) (record)); \
}
#define UNINSTALL_SEH_RECORD(record) \
{ \
__writefsdword(0, (DWORD) ((record)->Next)); \
}
#define INSTALL_EXCEPTION_HANDLING_RECORD(record) \
{ \
PEXCEPTION_REGISTRATION_RECORD __record = (record); \
_ASSERTE(__record < GetCurrentSEHRecord()); \
INSTALL_SEH_RECORD(record); \
}
//
// Note: this only pops a handler from the top of the stack. It will not remove a record from the middle of the
// chain, and I can assure you that you don't want to do that anyway.
//
#define UNINSTALL_EXCEPTION_HANDLING_RECORD(record) \
{ \
PEXCEPTION_REGISTRATION_RECORD __record = (record); \
_ASSERTE(__record == GetCurrentSEHRecord()); \
UNINSTALL_SEH_RECORD(record); \
}
// stackOverwriteBarrier is used to detect overwriting of stack which will mess up handler registration
#if defined(_DEBUG)
#define DECLARE_CPFH_EH_RECORD(pCurThread) \
FrameHandlerExRecordWithBarrier *___pExRecordWithBarrier = (FrameHandlerExRecordWithBarrier *)_alloca(sizeof(FrameHandlerExRecordWithBarrier)); \
for (int ___i =0; ___i < STACK_OVERWRITE_BARRIER_SIZE; ___i++) \
___pExRecordWithBarrier->m_StackOverwriteBarrier[___i] = STACK_OVERWRITE_BARRIER_VALUE; \
FrameHandlerExRecord *___pExRecord = &(___pExRecordWithBarrier->m_ExRecord); \
___pExRecord->m_ExReg.Handler = (PEXCEPTION_ROUTINE)COMPlusFrameHandler; \
___pExRecord->m_pEntryFrame = (pCurThread)->GetFrame();
#else
#define DECLARE_CPFH_EH_RECORD(pCurThread) \
FrameHandlerExRecord *___pExRecord = (FrameHandlerExRecord *)_alloca(sizeof(FrameHandlerExRecord)); \
___pExRecord->m_ExReg.Handler = (PEXCEPTION_ROUTINE)COMPlusFrameHandler; \
___pExRecord->m_pEntryFrame = (pCurThread)->GetFrame();
#endif
PEXCEPTION_REGISTRATION_RECORD GetCurrentSEHRecord();
PEXCEPTION_REGISTRATION_RECORD GetFirstCOMPlusSEHRecord(Thread*);
LPVOID COMPlusEndCatchWorker(Thread *pCurThread);
EXTERN_C LPVOID STDCALL COMPlusEndCatch(LPVOID ebp, DWORD ebx, DWORD edi, DWORD esi, LPVOID* pRetAddress);
#else // WIN64EXCEPTIONS
#define INSTALL_EXCEPTION_HANDLING_RECORD(record)
#define UNINSTALL_EXCEPTION_HANDLING_RECORD(record)
#define DECLARE_CPFH_EH_RECORD(pCurThread)
#endif // WIN64EXCEPTIONS
//
// Retrieves the redirected CONTEXT* from the stack frame of one of the
// RedirectedHandledJITCaseForXXX_Stub's.
//
PTR_CONTEXT GetCONTEXTFromRedirectedStubStackFrame(CONTEXT * pContext);
#ifdef WIN64EXCEPTIONS
PTR_CONTEXT GetCONTEXTFromRedirectedStubStackFrame(T_DISPATCHER_CONTEXT * pDispatcherContext);
#endif // WIN64EXCEPTIONS
// Determine the address of the instruction that made the current call.
inline
PCODE GetAdjustedCallAddress(PCODE returnAddress)
{
LIMITED_METHOD_CONTRACT;
return returnAddress - 5;
}
BOOL AdjustContextForVirtualStub(EXCEPTION_RECORD *pExceptionRecord, CONTEXT *pContext);
#endif // __excepx86_h__
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