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stubs.cpp
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stubs.cpp
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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.
//
// File: stubs.cpp
//
// This file contains stub functions for unimplemented features need to
// run on the LOONGARCH64 platform.
#include "common.h"
#include "dllimportcallback.h"
#include "comdelegate.h"
#include "asmconstants.h"
#include "virtualcallstub.h"
#include "jitinterface.h"
#include "ecall.h"
#ifndef DACCESS_COMPILE
//-----------------------------------------------------------------------
// InstructionFormat for B.cond
//-----------------------------------------------------------------------
class ConditionalBranchInstructionFormat : public InstructionFormat
{
public:
ConditionalBranchInstructionFormat() : InstructionFormat(InstructionFormat::k32)
{
LIMITED_METHOD_CONTRACT;
}
virtual UINT GetSizeOfInstruction(UINT refsize, UINT variationCode)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(!"LOONGARCH64: not implementation on loongarch64!!!");
_ASSERTE(refsize == InstructionFormat::k32);
return 4;
}
virtual UINT GetHotSpotOffset(UINT refsize, UINT variationCode)
{
WRAPPER_NO_CONTRACT;
return 0;
}
virtual BOOL CanReach(UINT refSize, UINT variationCode, BOOL fExternal, INT_PTR offset)
{
_ASSERTE(!fExternal || "LOONGARCH64:NYI - CompareAndBranchInstructionFormat::CanReach external");
if (fExternal)
return false;
if (offset < -1048576 || offset > 1048572)
return false;
return true;
}
////TODO: add for LOONGARCH. unused now!
// B.<cond> <label>
// Encoding 0|1|0|1|0|1|0|0|imm19|0|cond
// cond = Bits3-0(variation)
// imm19 = bits19-0(fixedUpReference/4), will be SignExtended
virtual VOID EmitInstruction(UINT refSize, __int64 fixedUpReference, BYTE *pOutBufferRX, BYTE *pOutBufferRW, UINT variationCode, BYTE *pDataBuffer)
{
_ASSERTE(!"LOONGARCH64: not implementation on loongarch64!!!");
LIMITED_METHOD_CONTRACT;
_ASSERTE(refSize == InstructionFormat::k32);
if (fixedUpReference < -1048576 || fixedUpReference > 1048572)
COMPlusThrow(kNotSupportedException);
_ASSERTE((fixedUpReference & 0x3) == 0);
DWORD imm19 = (DWORD)(0x7FFFF & (fixedUpReference >> 2));
pOutBufferRW[0] = static_cast<BYTE>((0x7 & imm19 /* Bits2-0(imm19) */) << 5 | (0xF & variationCode /* cond */));
pOutBufferRW[1] = static_cast<BYTE>((0x7F8 & imm19 /* Bits10-3(imm19) */) >> 3);
pOutBufferRW[2] = static_cast<BYTE>((0x7F800 & imm19 /* Bits19-11(imm19) */) >> 11);
pOutBufferRW[3] = static_cast<BYTE>(0x54);
}
};
//-----------------------------------------------------------------------
// InstructionFormat for JIRL (unconditional jump)
//-----------------------------------------------------------------------
class BranchInstructionFormat : public InstructionFormat
{
// Encoding of the VariationCode:
// bit(0) indicates whether this is a direct or an indirect jump.
// bit(1) indicates whether this is a branch with link -a.k.a call- jirl $r0/1,$r21,0
public:
enum VariationCodes
{
BIF_VAR_INDIRECT = 0x00000001,
BIF_VAR_CALL = 0x00000002,
BIF_VAR_JUMP = 0x00000000,
BIF_VAR_INDIRECT_CALL = 0x00000003
};
private:
BOOL IsIndirect(UINT variationCode)
{
return (variationCode & BIF_VAR_INDIRECT) != 0;
}
BOOL IsCall(UINT variationCode)
{
return (variationCode & BIF_VAR_CALL) != 0;
}
public:
BranchInstructionFormat() : InstructionFormat(InstructionFormat::k64)
{
LIMITED_METHOD_CONTRACT;
}
virtual UINT GetSizeOfInstruction(UINT refSize, UINT variationCode)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(refSize == InstructionFormat::k64);
if (IsIndirect(variationCode))
return 16;
else
return 12;
}
virtual UINT GetSizeOfData(UINT refSize, UINT variationCode)
{
WRAPPER_NO_CONTRACT;
return 8;
}
virtual UINT GetHotSpotOffset(UINT refsize, UINT variationCode)
{
WRAPPER_NO_CONTRACT;
return 0;
}
virtual BOOL CanReach(UINT refSize, UINT variationCode, BOOL fExternal, INT_PTR offset)
{
if (fExternal)
{
// Note that the parameter 'offset' is not an offset but the target address itself (when fExternal is true)
return (refSize == InstructionFormat::k64);
}
else
{
return ((offset >= -0x80000000L && offset <= 0x7fffffff) || (refSize == InstructionFormat::k64));
}
}
virtual VOID EmitInstruction(UINT refSize, __int64 fixedUpReference, BYTE *pOutBufferRX, BYTE *pOutBufferRW, UINT variationCode, BYTE *pDataBuffer)
{
LIMITED_METHOD_CONTRACT;
if (IsIndirect(variationCode))
{
_ASSERTE(((UINT_PTR)pDataBuffer & 7) == 0);
__int64 dataOffset = pDataBuffer - pOutBufferRW;
if ((dataOffset < -(0x80000000L)) || (dataOffset > 0x7fffffff))
COMPlusThrow(kNotSupportedException);
UINT32 imm16 = (UINT32)(0xFFF & dataOffset);
//pcaddi $r21,0
//ld.d $r21,$r21,dataOffset
//ld.d $r21,$r21,0
//jirl $r0/1,$r21,0
*(DWORD*)pOutBufferRW = 0x18000015 | ((dataOffset >>14) <<5);//pcaddi $r21,0
*(DWORD*)(pOutBufferRW + 4) = 0x28c002b5 | (imm16 << 10);//ld.d $r21,$r21,dataOffset-low12
*(DWORD*)(pOutBufferRW+8) = 0x28c002b5;//ld.d $r21,$r21,0
if (IsCall(variationCode))
{
*(DWORD*)(pOutBufferRW+12) = 0x4c0002a1;//jirl $ra,$r21,0
}
else
{
*(DWORD*)(pOutBufferRW+12) = 0x4c0002a0;//jirl $r0,$r21,0
}
*((__int64*)pDataBuffer) = fixedUpReference + (__int64)pOutBufferRX;
}
else
{
_ASSERTE(((UINT_PTR)pDataBuffer & 7) == 0);
__int64 dataOffset = pDataBuffer - pOutBufferRW;
if ((dataOffset < -(0x80000000L)) || (dataOffset > 0x7fffffff))
COMPlusThrow(kNotSupportedException);
UINT16 imm12 = (UINT16)(0xFFF & dataOffset);
//pcaddi $r21,0
//ld.d $r21,$r21,dataOffset
//jirl $r0/1,$r21,0
*(DWORD*)pOutBufferRW = 0x18000015 | ((dataOffset >>14) <<5);//pcaddi $r21,0
*(DWORD*)(pOutBufferRW + 4) = 0x28c002b5 | (imm12 << 10);//ld.d $r21,$r21,dataOffset-low12
if (IsCall(variationCode))
{
*((DWORD*)(pOutBufferRW+8)) = 0x4c0002a1;//jirl $ra,$r21,0
}
else
{
*((DWORD*)(pOutBufferRW+8)) = 0x4c0002a0;//jirl $r0,$r21,0
}
if (!ClrSafeInt<__int64>::addition(fixedUpReference, (__int64)pOutBufferRX, fixedUpReference))
COMPlusThrowArithmetic();
*((__int64*)pDataBuffer) = fixedUpReference;
}
}
};
//-----------------------------------------------------------------------
// InstructionFormat for loading a label to the register (pcaddi/ld.d)
//-----------------------------------------------------------------------
class LoadFromLabelInstructionFormat : public InstructionFormat
{
public:
LoadFromLabelInstructionFormat() : InstructionFormat( InstructionFormat::k32)
{
LIMITED_METHOD_CONTRACT;
}
virtual UINT GetSizeOfInstruction(UINT refSize, UINT variationCode)
{
_ASSERTE(!"LOONGARCH64: not implementation on loongarch64!!!");
WRAPPER_NO_CONTRACT;
return 8;
}
virtual UINT GetHotSpotOffset(UINT refsize, UINT variationCode)
{
WRAPPER_NO_CONTRACT;
return 0;
}
virtual BOOL CanReach(UINT refSize, UINT variationCode, BOOL fExternal, INT_PTR offset)
{
return fExternal;
}
virtual VOID EmitInstruction(UINT refSize, __int64 fixedUpReference, BYTE *pOutBufferRX, BYTE *pOutBufferRW, UINT variationCode, BYTE *pDataBuffer)
{
_ASSERTE(!"LOONGARCH64: not implementation on loongarch64!!!");
LIMITED_METHOD_CONTRACT;
// VariationCode is used to indicate the register the label is going to be loaded
DWORD imm =(DWORD)(fixedUpReference>>12);
if (imm>>21)
COMPlusThrow(kNotSupportedException);
// pcaddi r21, #Page_of_fixedUpReference
*((DWORD*)pOutBufferRW) = 0;
// ld.d r21, [r21, #offset_of_fixedUpReference_to_its_page]
UINT64 target = (UINT64)(fixedUpReference + pOutBufferRX)>>3;
*((DWORD*)(pOutBufferRW+4)) = 0;
}
};
static BYTE gConditionalBranchIF[sizeof(ConditionalBranchInstructionFormat)];
static BYTE gBranchIF[sizeof(BranchInstructionFormat)];
//static BYTE gLoadFromLabelIF[sizeof(LoadFromLabelInstructionFormat)];
#endif
void ClearRegDisplayArgumentAndScratchRegisters(REGDISPLAY * pRD)
{
pRD->volatileCurrContextPointers.R0 = NULL;
pRD->volatileCurrContextPointers.A0 = NULL;
pRD->volatileCurrContextPointers.A1 = NULL;
pRD->volatileCurrContextPointers.A2 = NULL;
pRD->volatileCurrContextPointers.A3 = NULL;
pRD->volatileCurrContextPointers.A4 = NULL;
pRD->volatileCurrContextPointers.A5 = NULL;
pRD->volatileCurrContextPointers.A6 = NULL;
pRD->volatileCurrContextPointers.A7 = NULL;
pRD->volatileCurrContextPointers.T0 = NULL;
pRD->volatileCurrContextPointers.T1 = NULL;
pRD->volatileCurrContextPointers.T2 = NULL;
pRD->volatileCurrContextPointers.T3 = NULL;
pRD->volatileCurrContextPointers.T4 = NULL;
pRD->volatileCurrContextPointers.T5 = NULL;
pRD->volatileCurrContextPointers.T6 = NULL;
pRD->volatileCurrContextPointers.T7 = NULL;
pRD->volatileCurrContextPointers.T8 = NULL;
pRD->volatileCurrContextPointers.X0 = NULL;
}
void LazyMachState::unwindLazyState(LazyMachState* baseState,
MachState* unwoundstate,
DWORD threadId,
int funCallDepth,
HostCallPreference hostCallPreference)
{
T_CONTEXT context;
T_KNONVOLATILE_CONTEXT_POINTERS nonVolContextPtrs;
context.ContextFlags = 0; // Read by PAL_VirtualUnwind.
context.S0 = unwoundstate->captureCalleeSavedRegisters[0] = baseState->captureCalleeSavedRegisters[0];
context.S1 = unwoundstate->captureCalleeSavedRegisters[1] = baseState->captureCalleeSavedRegisters[1];
context.S2 = unwoundstate->captureCalleeSavedRegisters[2] = baseState->captureCalleeSavedRegisters[2];
context.S3 = unwoundstate->captureCalleeSavedRegisters[3] = baseState->captureCalleeSavedRegisters[3];
context.S4 = unwoundstate->captureCalleeSavedRegisters[4] = baseState->captureCalleeSavedRegisters[4];
context.S5 = unwoundstate->captureCalleeSavedRegisters[5] = baseState->captureCalleeSavedRegisters[5];
context.S6 = unwoundstate->captureCalleeSavedRegisters[6] = baseState->captureCalleeSavedRegisters[6];
context.S7 = unwoundstate->captureCalleeSavedRegisters[7] = baseState->captureCalleeSavedRegisters[7];
context.S8 = unwoundstate->captureCalleeSavedRegisters[8] = baseState->captureCalleeSavedRegisters[8];
context.Fp = unwoundstate->captureCalleeSavedRegisters[9] = baseState->captureCalleeSavedRegisters[9];
context.Tp = unwoundstate->captureCalleeSavedRegisters[10] = baseState->captureCalleeSavedRegisters[10];
context.Ra = NULL; // Filled by the unwinder
context.Sp = baseState->captureSp;
context.Pc = baseState->captureIp;
#if !defined(DACCESS_COMPILE)
// For DAC, if we get here, it means that the LazyMachState is uninitialized and we have to unwind it.
// The API we use to unwind in DAC is StackWalk64(), which does not support the context pointers.
//
// Restore the integer registers to KNONVOLATILE_CONTEXT_POINTERS to be used for unwinding.
nonVolContextPtrs.S0 = &unwoundstate->captureCalleeSavedRegisters[0];
nonVolContextPtrs.S1 = &unwoundstate->captureCalleeSavedRegisters[1];
nonVolContextPtrs.S2 = &unwoundstate->captureCalleeSavedRegisters[2];
nonVolContextPtrs.S3 = &unwoundstate->captureCalleeSavedRegisters[3];
nonVolContextPtrs.S4 = &unwoundstate->captureCalleeSavedRegisters[4];
nonVolContextPtrs.S5 = &unwoundstate->captureCalleeSavedRegisters[5];
nonVolContextPtrs.S6 = &unwoundstate->captureCalleeSavedRegisters[6];
nonVolContextPtrs.S7 = &unwoundstate->captureCalleeSavedRegisters[7];
nonVolContextPtrs.S8 = &unwoundstate->captureCalleeSavedRegisters[8];
nonVolContextPtrs.Fp = &unwoundstate->captureCalleeSavedRegisters[9];
nonVolContextPtrs.Tp = &unwoundstate->captureCalleeSavedRegisters[10];
nonVolContextPtrs.Ra = NULL; // Filled by the unwinder
#endif // DACCESS_COMPILE
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK LazyMachState::unwindLazyState(ip:%p,sp:%p)\n", baseState->captureIp, baseState->captureSp));
PCODE pvControlPc;
do {
#ifndef TARGET_UNIX
pvControlPc = Thread::VirtualUnwindCallFrame(&context, &nonVolContextPtrs);
#else // !TARGET_UNIX
#ifdef DACCESS_COMPILE
HRESULT hr = DacVirtualUnwind(threadId, &context, &nonVolContextPtrs);
if (FAILED(hr))
{
DacError(hr);
}
#else // DACCESS_COMPILE
BOOL success = PAL_VirtualUnwind(&context, &nonVolContextPtrs);
if (!success)
{
_ASSERTE(!"unwindLazyState: Unwinding failed");
EEPOLICY_HANDLE_FATAL_ERROR(COR_E_EXECUTIONENGINE);
}
#endif // DACCESS_COMPILE
pvControlPc = GetIP(&context);
#endif // !TARGET_UNIX
if (funCallDepth > 0)
{
funCallDepth--;
if (funCallDepth == 0)
break;
}
else
{
// Determine whether given IP resides in JITted code. (It returns nonzero in that case.)
// Use it now to see if we've unwound to managed code yet.
BOOL fFailedReaderLock = FALSE;
BOOL fIsManagedCode = ExecutionManager::IsManagedCode(pvControlPc, hostCallPreference, &fFailedReaderLock);
if (fFailedReaderLock)
{
// We don't know if we would have been able to find a JIT
// manager, because we couldn't enter the reader lock without
// yielding (and our caller doesn't want us to yield). So abort
// now.
// Invalidate the lazyState we're returning, so the caller knows
// we aborted before we could fully unwind
unwoundstate->_isValid = false;
return;
}
if (fIsManagedCode)
break;
}
} while (true);
#ifdef TARGET_UNIX
unwoundstate->captureCalleeSavedRegisters[0] = context.S0;
unwoundstate->captureCalleeSavedRegisters[1] = context.S1;
unwoundstate->captureCalleeSavedRegisters[2] = context.S2;
unwoundstate->captureCalleeSavedRegisters[3] = context.S3;
unwoundstate->captureCalleeSavedRegisters[4] = context.S4;
unwoundstate->captureCalleeSavedRegisters[5] = context.S5;
unwoundstate->captureCalleeSavedRegisters[6] = context.S6;
unwoundstate->captureCalleeSavedRegisters[7] = context.S7;
unwoundstate->captureCalleeSavedRegisters[8] = context.S8;
unwoundstate->captureCalleeSavedRegisters[9] = context.Fp;
unwoundstate->captureCalleeSavedRegisters[10] = context.Tp;
#endif
#ifdef DACCESS_COMPILE
// For DAC builds, we update the registers directly since we dont have context pointers
unwoundstate->captureCalleeSavedRegisters[0] = context.S0;
unwoundstate->captureCalleeSavedRegisters[1] = context.S1;
unwoundstate->captureCalleeSavedRegisters[2] = context.S2;
unwoundstate->captureCalleeSavedRegisters[3] = context.S3;
unwoundstate->captureCalleeSavedRegisters[4] = context.S4;
unwoundstate->captureCalleeSavedRegisters[5] = context.S5;
unwoundstate->captureCalleeSavedRegisters[6] = context.S6;
unwoundstate->captureCalleeSavedRegisters[7] = context.S7;
unwoundstate->captureCalleeSavedRegisters[8] = context.S8;
unwoundstate->captureCalleeSavedRegisters[9] = context.Fp;
unwoundstate->captureCalleeSavedRegisters[10] = context.Tp;
#else // !DACCESS_COMPILE
// For non-DAC builds, update the register state from context pointers
unwoundstate->ptrCalleeSavedRegisters[0] = nonVolContextPtrs.S0;
unwoundstate->ptrCalleeSavedRegisters[1] = nonVolContextPtrs.S1;
unwoundstate->ptrCalleeSavedRegisters[2] = nonVolContextPtrs.S2;
unwoundstate->ptrCalleeSavedRegisters[3] = nonVolContextPtrs.S3;
unwoundstate->ptrCalleeSavedRegisters[4] = nonVolContextPtrs.S4;
unwoundstate->ptrCalleeSavedRegisters[5] = nonVolContextPtrs.S5;
unwoundstate->ptrCalleeSavedRegisters[6] = nonVolContextPtrs.S6;
unwoundstate->ptrCalleeSavedRegisters[7] = nonVolContextPtrs.S7;
unwoundstate->ptrCalleeSavedRegisters[8] = nonVolContextPtrs.S8;
unwoundstate->ptrCalleeSavedRegisters[9] = nonVolContextPtrs.Fp;
unwoundstate->ptrCalleeSavedRegisters[10] = nonVolContextPtrs.Tp;
#endif // DACCESS_COMPILE
unwoundstate->_pc = context.Pc;
unwoundstate->_sp = context.Sp;
unwoundstate->_isValid = TRUE;
}
void HelperMethodFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
SUPPORTS_DAC;
}
CONTRACTL_END;
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE; // Don't add usage of this field. This is only temporary.
//
// Copy the saved state from the frame to the current context.
//
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK HelperMethodFrame::UpdateRegDisplay cached ip:%p, sp:%p\n", m_MachState._pc, m_MachState._sp));
#if defined(DACCESS_COMPILE)
// For DAC, we may get here when the HMF is still uninitialized.
// So we may need to unwind here.
if (!m_MachState.isValid())
{
// This allocation throws on OOM.
MachState* pUnwoundState = (MachState*)DacAllocHostOnlyInstance(sizeof(*pUnwoundState), true);
InsureInit(false, pUnwoundState);
pRD->pCurrentContext->Pc = pRD->ControlPC = pUnwoundState->_pc;
pRD->pCurrentContext->Sp = pRD->SP = pUnwoundState->_sp;
pRD->pCurrentContext->S0 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[0]);
pRD->pCurrentContext->S1 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[1]);
pRD->pCurrentContext->S2 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[2]);
pRD->pCurrentContext->S3 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[3]);
pRD->pCurrentContext->S4 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[4]);
pRD->pCurrentContext->S5 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[5]);
pRD->pCurrentContext->S6 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[6]);
pRD->pCurrentContext->S7 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[7]);
pRD->pCurrentContext->S8 = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[8]);
pRD->pCurrentContext->Fp = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[9]);
pRD->pCurrentContext->Tp = (DWORD64)(pUnwoundState->captureCalleeSavedRegisters[10]);
pRD->pCurrentContext->Ra = NULL; // Unwind again to get Caller's PC
pRD->pCurrentContextPointers->S0 = pUnwoundState->ptrCalleeSavedRegisters[0];
pRD->pCurrentContextPointers->S1 = pUnwoundState->ptrCalleeSavedRegisters[1];
pRD->pCurrentContextPointers->S2 = pUnwoundState->ptrCalleeSavedRegisters[2];
pRD->pCurrentContextPointers->S3 = pUnwoundState->ptrCalleeSavedRegisters[3];
pRD->pCurrentContextPointers->S4 = pUnwoundState->ptrCalleeSavedRegisters[4];
pRD->pCurrentContextPointers->S5 = pUnwoundState->ptrCalleeSavedRegisters[5];
pRD->pCurrentContextPointers->S6 = pUnwoundState->ptrCalleeSavedRegisters[6];
pRD->pCurrentContextPointers->S7 = pUnwoundState->ptrCalleeSavedRegisters[7];
pRD->pCurrentContextPointers->S8 = pUnwoundState->ptrCalleeSavedRegisters[8];
pRD->pCurrentContextPointers->Fp = pUnwoundState->ptrCalleeSavedRegisters[9];
pRD->pCurrentContextPointers->Tp = pUnwoundState->ptrCalleeSavedRegisters[10];
pRD->pCurrentContextPointers->Ra = NULL;
return;
}
#endif // DACCESS_COMPILE
// reset pContext; it's only valid for active (top-most) frame
pRD->pContext = NULL;
pRD->ControlPC = GetReturnAddress(); // m_MachState._pc;
pRD->SP = (DWORD64)(size_t)m_MachState._sp;
pRD->pCurrentContext->Pc = pRD->ControlPC;
pRD->pCurrentContext->Sp = pRD->SP;
#ifdef TARGET_UNIX
pRD->pCurrentContext->S0 = m_MachState.ptrCalleeSavedRegisters[0] ? *m_MachState.ptrCalleeSavedRegisters[0] : m_MachState.captureCalleeSavedRegisters[0];
pRD->pCurrentContext->S1 = m_MachState.ptrCalleeSavedRegisters[1] ? *m_MachState.ptrCalleeSavedRegisters[1] : m_MachState.captureCalleeSavedRegisters[1];
pRD->pCurrentContext->S2 = m_MachState.ptrCalleeSavedRegisters[2] ? *m_MachState.ptrCalleeSavedRegisters[2] : m_MachState.captureCalleeSavedRegisters[2];
pRD->pCurrentContext->S3 = m_MachState.ptrCalleeSavedRegisters[3] ? *m_MachState.ptrCalleeSavedRegisters[3] : m_MachState.captureCalleeSavedRegisters[3];
pRD->pCurrentContext->S4 = m_MachState.ptrCalleeSavedRegisters[4] ? *m_MachState.ptrCalleeSavedRegisters[4] : m_MachState.captureCalleeSavedRegisters[4];
pRD->pCurrentContext->S5 = m_MachState.ptrCalleeSavedRegisters[5] ? *m_MachState.ptrCalleeSavedRegisters[5] : m_MachState.captureCalleeSavedRegisters[5];
pRD->pCurrentContext->S6 = m_MachState.ptrCalleeSavedRegisters[6] ? *m_MachState.ptrCalleeSavedRegisters[6] : m_MachState.captureCalleeSavedRegisters[6];
pRD->pCurrentContext->S7 = m_MachState.ptrCalleeSavedRegisters[7] ? *m_MachState.ptrCalleeSavedRegisters[7] : m_MachState.captureCalleeSavedRegisters[7];
pRD->pCurrentContext->S8 = m_MachState.ptrCalleeSavedRegisters[8] ? *m_MachState.ptrCalleeSavedRegisters[8] : m_MachState.captureCalleeSavedRegisters[8];
pRD->pCurrentContext->Fp = m_MachState.ptrCalleeSavedRegisters[9] ? *m_MachState.ptrCalleeSavedRegisters[9] : m_MachState.captureCalleeSavedRegisters[9];
pRD->pCurrentContext->Tp = m_MachState.ptrCalleeSavedRegisters[10] ? *m_MachState.ptrCalleeSavedRegisters[10] : m_MachState.captureCalleeSavedRegisters[10];
pRD->pCurrentContext->Ra = NULL; // Unwind again to get Caller's PC
#else // TARGET_UNIX
pRD->pCurrentContext->S0 = *m_MachState.ptrCalleeSavedRegisters[0];
pRD->pCurrentContext->S1 = *m_MachState.ptrCalleeSavedRegisters[1];
pRD->pCurrentContext->S2 = *m_MachState.ptrCalleeSavedRegisters[2];
pRD->pCurrentContext->S3 = *m_MachState.ptrCalleeSavedRegisters[3];
pRD->pCurrentContext->S4 = *m_MachState.ptrCalleeSavedRegisters[4];
pRD->pCurrentContext->S5 = *m_MachState.ptrCalleeSavedRegisters[5];
pRD->pCurrentContext->S6 = *m_MachState.ptrCalleeSavedRegisters[6];
pRD->pCurrentContext->S7 = *m_MachState.ptrCalleeSavedRegisters[7];
pRD->pCurrentContext->S8 = *m_MachState.ptrCalleeSavedRegisters[8];
pRD->pCurrentContext->Fp = *m_MachState.ptrCalleeSavedRegisters[9];
pRD->pCurrentContext->Tp = *m_MachState.ptrCalleeSavedRegisters[10];
pRD->pCurrentContext->Ra = NULL; // Unwind again to get Caller's PC
#endif
#if !defined(DACCESS_COMPILE)
pRD->pCurrentContextPointers->S0 = m_MachState.ptrCalleeSavedRegisters[0];
pRD->pCurrentContextPointers->S1 = m_MachState.ptrCalleeSavedRegisters[1];
pRD->pCurrentContextPointers->S2 = m_MachState.ptrCalleeSavedRegisters[2];
pRD->pCurrentContextPointers->S3 = m_MachState.ptrCalleeSavedRegisters[3];
pRD->pCurrentContextPointers->S4 = m_MachState.ptrCalleeSavedRegisters[4];
pRD->pCurrentContextPointers->S5 = m_MachState.ptrCalleeSavedRegisters[5];
pRD->pCurrentContextPointers->S6 = m_MachState.ptrCalleeSavedRegisters[6];
pRD->pCurrentContextPointers->S7 = m_MachState.ptrCalleeSavedRegisters[7];
pRD->pCurrentContextPointers->S8 = m_MachState.ptrCalleeSavedRegisters[8];
pRD->pCurrentContextPointers->Fp = m_MachState.ptrCalleeSavedRegisters[9];
pRD->pCurrentContextPointers->Tp = m_MachState.ptrCalleeSavedRegisters[10];
pRD->pCurrentContextPointers->Ra = NULL; // Unwind again to get Caller's PC
#endif
ClearRegDisplayArgumentAndScratchRegisters(pRD);
}
#ifndef DACCESS_COMPILE
void ThisPtrRetBufPrecode::Init(MethodDesc* pMD, LoaderAllocator *pLoaderAllocator)
{
WRAPPER_NO_CONTRACT;
//Initially
//a0 -This ptr
//a1 -ReturnBuffer
m_rgCode[0] = 0x18000055; //pcaddi r21,2
m_rgCode[1] = 0x28c042b5; //ld.d r21,16(r21)
m_rgCode[2] = 0x0380008f; //ori r15,a0,0x0
m_rgCode[3] = 0x038000a4; //ori a0,a1,0x0
m_rgCode[4] = 0x038001e5; //ori a1,r15,0x0
m_rgCode[5] = 0x4c0002a0; //jirl r0,r21,0
_ASSERTE((UINT32*)&m_pTarget == &m_rgCode[6]);
_ASSERTE(6 == ARRAY_SIZE(m_rgCode));
m_pTarget = GetPreStubEntryPoint();
m_pMethodDesc = (TADDR)pMD;
}
#endif // !DACCESS_COMPILE
void UpdateRegDisplayFromCalleeSavedRegisters(REGDISPLAY * pRD, CalleeSavedRegisters * pCalleeSaved)
{
LIMITED_METHOD_CONTRACT;
pRD->pCurrentContext->S0 = pCalleeSaved->s0;
pRD->pCurrentContext->S1 = pCalleeSaved->s1;
pRD->pCurrentContext->S2 = pCalleeSaved->s2;
pRD->pCurrentContext->S3 = pCalleeSaved->s3;
pRD->pCurrentContext->S4 = pCalleeSaved->s4;
pRD->pCurrentContext->S5 = pCalleeSaved->s5;
pRD->pCurrentContext->S6 = pCalleeSaved->s6;
pRD->pCurrentContext->S7 = pCalleeSaved->s7;
pRD->pCurrentContext->S8 = pCalleeSaved->s8;
pRD->pCurrentContext->Tp = pCalleeSaved->tp;
pRD->pCurrentContext->Fp = pCalleeSaved->fp;
pRD->pCurrentContext->Ra = pCalleeSaved->ra;
T_KNONVOLATILE_CONTEXT_POINTERS * pContextPointers = pRD->pCurrentContextPointers;
pContextPointers->S0 = (PDWORD64)&pCalleeSaved->s0;
pContextPointers->S1 = (PDWORD64)&pCalleeSaved->s1;
pContextPointers->S2 = (PDWORD64)&pCalleeSaved->s2;
pContextPointers->S3 = (PDWORD64)&pCalleeSaved->s3;
pContextPointers->S4 = (PDWORD64)&pCalleeSaved->s4;
pContextPointers->S5 = (PDWORD64)&pCalleeSaved->s5;
pContextPointers->S6 = (PDWORD64)&pCalleeSaved->s6;
pContextPointers->S7 = (PDWORD64)&pCalleeSaved->s7;
pContextPointers->S8 = (PDWORD64)&pCalleeSaved->s8;
pContextPointers->Tp = (PDWORD64)&pCalleeSaved->tp;
pContextPointers->Fp = (PDWORD64)&pCalleeSaved->fp;
pContextPointers->Ra = (PDWORD64)&pCalleeSaved->ra;
}
void TransitionFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE; // Don't add usage of this field. This is only temporary.
// copy the callee saved regs
CalleeSavedRegisters *pCalleeSaved = GetCalleeSavedRegisters();
UpdateRegDisplayFromCalleeSavedRegisters(pRD, pCalleeSaved);
ClearRegDisplayArgumentAndScratchRegisters(pRD);
// copy the control registers
//pRD->pCurrentContext->Fp = pCalleeSaved->fp;//not needed for duplicated.
//pRD->pCurrentContext->Ra = pCalleeSaved->ra;//not needed for duplicated.
pRD->pCurrentContext->Pc = GetReturnAddress();
pRD->pCurrentContext->Sp = this->GetSP();
// Finally, syncup the regdisplay with the context
SyncRegDisplayToCurrentContext(pRD);
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK TransitionFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
}
void FaultingExceptionFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
LIMITED_METHOD_DAC_CONTRACT;
// Copy the context to regdisplay
memcpy(pRD->pCurrentContext, &m_ctx, sizeof(T_CONTEXT));
pRD->ControlPC = ::GetIP(&m_ctx);
pRD->SP = ::GetSP(&m_ctx);
// Update the integer registers in KNONVOLATILE_CONTEXT_POINTERS from
// the exception context we have.
pRD->pCurrentContextPointers->S0 = (PDWORD64)&m_ctx.S0;
pRD->pCurrentContextPointers->S1 = (PDWORD64)&m_ctx.S1;
pRD->pCurrentContextPointers->S2 = (PDWORD64)&m_ctx.S2;
pRD->pCurrentContextPointers->S3 = (PDWORD64)&m_ctx.S3;
pRD->pCurrentContextPointers->S4 = (PDWORD64)&m_ctx.S4;
pRD->pCurrentContextPointers->S5 = (PDWORD64)&m_ctx.S5;
pRD->pCurrentContextPointers->S6 = (PDWORD64)&m_ctx.S6;
pRD->pCurrentContextPointers->S7 = (PDWORD64)&m_ctx.S7;
pRD->pCurrentContextPointers->S8 = (PDWORD64)&m_ctx.S8;
pRD->pCurrentContextPointers->Fp = (PDWORD64)&m_ctx.Fp;
pRD->pCurrentContextPointers->Tp = (PDWORD64)&m_ctx.Tp;
pRD->pCurrentContextPointers->Ra = (PDWORD64)&m_ctx.Ra;
ClearRegDisplayArgumentAndScratchRegisters(pRD);
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE; // Don't add usage of this field. This is only temporary.
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK FaultingExceptionFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
}
void InlinedCallFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
CONTRACT_VOID
{
NOTHROW;
GC_NOTRIGGER;
#ifdef PROFILING_SUPPORTED
PRECONDITION(CORProfilerStackSnapshotEnabled() || InlinedCallFrame::FrameHasActiveCall(this));
#endif
HOST_NOCALLS;
MODE_ANY;
SUPPORTS_DAC;
}
CONTRACT_END;
if (!InlinedCallFrame::FrameHasActiveCall(this))
{
LOG((LF_CORDB, LL_ERROR, "WARNING: InlinedCallFrame::UpdateRegDisplay called on inactive frame %p\n", this));
return;
}
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE;
pRD->pCurrentContext->Pc = *(DWORD64 *)&m_pCallerReturnAddress;
pRD->pCurrentContext->Sp = *(DWORD64 *)&m_pCallSiteSP;
pRD->pCurrentContext->Fp = *(DWORD64 *)&m_pCalleeSavedFP;
pRD->pCurrentContextPointers->S0 = NULL;
pRD->pCurrentContextPointers->S1 = NULL;
pRD->pCurrentContextPointers->S2 = NULL;
pRD->pCurrentContextPointers->S3 = NULL;
pRD->pCurrentContextPointers->S4 = NULL;
pRD->pCurrentContextPointers->S5 = NULL;
pRD->pCurrentContextPointers->S6 = NULL;
pRD->pCurrentContextPointers->S7 = NULL;
pRD->pCurrentContextPointers->S8 = NULL;
pRD->pCurrentContextPointers->Tp = NULL;
pRD->ControlPC = m_pCallerReturnAddress;
pRD->SP = (DWORD64) dac_cast<TADDR>(m_pCallSiteSP);
// reset pContext; it's only valid for active (top-most) frame
pRD->pContext = NULL;
ClearRegDisplayArgumentAndScratchRegisters(pRD);
// Update the frame pointer in the current context.
pRD->pCurrentContextPointers->Fp = &m_pCalleeSavedFP;
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK InlinedCallFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
RETURN;
}
#ifdef FEATURE_HIJACK
TADDR ResumableFrame::GetReturnAddressPtr(void)
{
LIMITED_METHOD_DAC_CONTRACT;
return dac_cast<TADDR>(m_Regs) + offsetof(T_CONTEXT, Pc);
}
void ResumableFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
CONTRACT_VOID
{
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
SUPPORTS_DAC;
}
CONTRACT_END;
CopyMemory(pRD->pCurrentContext, m_Regs, sizeof(T_CONTEXT));
pRD->ControlPC = m_Regs->Pc;
pRD->SP = m_Regs->Sp;
pRD->pCurrentContextPointers->S0 = &m_Regs->S0;
pRD->pCurrentContextPointers->S1 = &m_Regs->S1;
pRD->pCurrentContextPointers->S2 = &m_Regs->S2;
pRD->pCurrentContextPointers->S3 = &m_Regs->S3;
pRD->pCurrentContextPointers->S4 = &m_Regs->S4;
pRD->pCurrentContextPointers->S5 = &m_Regs->S5;
pRD->pCurrentContextPointers->S6 = &m_Regs->S6;
pRD->pCurrentContextPointers->S7 = &m_Regs->S7;
pRD->pCurrentContextPointers->S8 = &m_Regs->S8;
pRD->pCurrentContextPointers->Tp = &m_Regs->Tp;
pRD->pCurrentContextPointers->Fp = &m_Regs->Fp;
pRD->pCurrentContextPointers->Ra = &m_Regs->Ra;
pRD->volatileCurrContextPointers.R0 = &m_Regs->R0;
pRD->volatileCurrContextPointers.A0 = &m_Regs->A0;
pRD->volatileCurrContextPointers.A1 = &m_Regs->A1;
pRD->volatileCurrContextPointers.A2 = &m_Regs->A2;
pRD->volatileCurrContextPointers.A3 = &m_Regs->A3;
pRD->volatileCurrContextPointers.A4 = &m_Regs->A4;
pRD->volatileCurrContextPointers.A5 = &m_Regs->A5;
pRD->volatileCurrContextPointers.A6 = &m_Regs->A6;
pRD->volatileCurrContextPointers.A7 = &m_Regs->A7;
pRD->volatileCurrContextPointers.T0 = &m_Regs->T0;
pRD->volatileCurrContextPointers.T1 = &m_Regs->T1;
pRD->volatileCurrContextPointers.T2 = &m_Regs->T2;
pRD->volatileCurrContextPointers.T3 = &m_Regs->T3;
pRD->volatileCurrContextPointers.T4 = &m_Regs->T4;
pRD->volatileCurrContextPointers.T5 = &m_Regs->T5;
pRD->volatileCurrContextPointers.T6 = &m_Regs->T6;
pRD->volatileCurrContextPointers.T7 = &m_Regs->T7;
pRD->volatileCurrContextPointers.T8 = &m_Regs->T8;
pRD->volatileCurrContextPointers.X0 = &m_Regs->X0;
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE; // Don't add usage of this field. This is only temporary.
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK ResumableFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
RETURN;
}
void HijackFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
LIMITED_METHOD_CONTRACT;
pRD->IsCallerContextValid = FALSE;
pRD->IsCallerSPValid = FALSE;
pRD->pCurrentContext->Pc = m_ReturnAddress;
size_t s = sizeof(struct HijackArgs);
_ASSERTE(s%8 == 0); // HijackArgs contains register values and hence will be a multiple of 8
// stack must be multiple of 16. So if s is not multiple of 16 then there must be padding of 8 bytes
s = s + s%16;
pRD->pCurrentContext->Sp = PTR_TO_TADDR(m_Args) + s ;
pRD->pCurrentContext->S0 = m_Args->S0;
pRD->pCurrentContext->S1 = m_Args->S1;
pRD->pCurrentContext->S2 = m_Args->S2;
pRD->pCurrentContext->S3 = m_Args->S3;
pRD->pCurrentContext->S4 = m_Args->S4;
pRD->pCurrentContext->S5 = m_Args->S5;
pRD->pCurrentContext->S6 = m_Args->S6;
pRD->pCurrentContext->S7 = m_Args->S7;
pRD->pCurrentContext->S8 = m_Args->S8;
pRD->pCurrentContext->Tp = m_Args->Tp;
pRD->pCurrentContext->Fp = m_Args->Fp;
pRD->pCurrentContext->Ra = m_Args->Ra;
pRD->pCurrentContextPointers->S0 = &m_Args->S0;
pRD->pCurrentContextPointers->S1 = &m_Args->S1;
pRD->pCurrentContextPointers->S2 = &m_Args->S2;
pRD->pCurrentContextPointers->S3 = &m_Args->S3;
pRD->pCurrentContextPointers->S4 = &m_Args->S4;
pRD->pCurrentContextPointers->S5 = &m_Args->S5;
pRD->pCurrentContextPointers->S6 = &m_Args->S6;
pRD->pCurrentContextPointers->S7 = &m_Args->S7;
pRD->pCurrentContextPointers->S8 = &m_Args->S8;
pRD->pCurrentContextPointers->Tp = &m_Args->Tp;
pRD->pCurrentContextPointers->Fp = &m_Args->Fp;
pRD->pCurrentContextPointers->Ra = NULL;
SyncRegDisplayToCurrentContext(pRD);
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK HijackFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
}
#endif // FEATURE_HIJACK
#ifdef FEATURE_COMINTEROP
void emitCOMStubCall (ComCallMethodDesc *pCOMMethodRX, ComCallMethodDesc *pCOMMethodRW, PCODE target)
{
WRAPPER_NO_CONTRACT;
// pcaddi $r21,0
// ld.d $t2, label_comCallMethodDesc
// ld.d $r21, label_target
// jirl $r0,$r21,0
// label_target:
// target address (8 bytes)
// label_comCallMethodDesc:
DWORD rgCode[] = {
0x0,
0x0,
0x0
};
_ASSERTE(!"LOONGARCH64: not implementation on loongarch64!!!");
BYTE *pBufferRX = (BYTE*)pCOMMethodRX - COMMETHOD_CALL_PRESTUB_SIZE;
BYTE *pBufferRW = (BYTE*)pCOMMethodRW - COMMETHOD_CALL_PRESTUB_SIZE;
memcpy(pBufferRW, rgCode, sizeof(rgCode));
*((PCODE*)(pBufferRW + sizeof(rgCode) + 4)) = target;
// Ensure that the updated instructions get actually written
ClrFlushInstructionCache(pBufferRX, COMMETHOD_CALL_PRESTUB_SIZE);
_ASSERTE(IS_ALIGNED(pBufferRX + COMMETHOD_CALL_PRESTUB_ADDRESS_OFFSET, sizeof(void*)) &&
*((PCODE*)(pBufferRX + COMMETHOD_CALL_PRESTUB_ADDRESS_OFFSET)) == target);
}
#endif // FEATURE_COMINTEROP
void JIT_TailCall()
{
_ASSERTE(!"LOONGARCH64:NYI");
}
#if !defined(DACCESS_COMPILE)
EXTERN_C void JIT_UpdateWriteBarrierState(bool skipEphemeralCheck, size_t writeableOffset);
extern "C" void STDCALL JIT_PatchedCodeStart();
extern "C" void STDCALL JIT_PatchedCodeLast();
static void UpdateWriteBarrierState(bool skipEphemeralCheck)
{
BYTE *writeBarrierCodeStart = GetWriteBarrierCodeLocation((void*)JIT_PatchedCodeStart);
BYTE *writeBarrierCodeStartRW = writeBarrierCodeStart;
ExecutableWriterHolderNoLog<BYTE> writeBarrierWriterHolder;
if (IsWriteBarrierCopyEnabled())
{
writeBarrierWriterHolder.AssignExecutableWriterHolder(writeBarrierCodeStart, (BYTE*)JIT_PatchedCodeLast - (BYTE*)JIT_PatchedCodeStart);
writeBarrierCodeStartRW = writeBarrierWriterHolder.GetRW();
}
JIT_UpdateWriteBarrierState(GCHeapUtilities::IsServerHeap(), writeBarrierCodeStartRW - writeBarrierCodeStart);
}
void InitJITHelpers1()
{
STANDARD_VM_CONTRACT;
_ASSERTE(g_SystemInfo.dwNumberOfProcessors != 0);
// Allocation helpers, faster but non-logging
if (!((TrackAllocationsEnabled()) ||
(LoggingOn(LF_GCALLOC, LL_INFO10))
#ifdef _DEBUG
|| (g_pConfig->ShouldInjectFault(INJECTFAULT_GCHEAP) != 0)
#endif // _DEBUG
))
{
if (GCHeapUtilities::UseThreadAllocationContexts())
{
SetJitHelperFunction(CORINFO_HELP_NEWSFAST, JIT_NewS_MP_FastPortable);
SetJitHelperFunction(CORINFO_HELP_NEWSFAST_ALIGN8, JIT_NewS_MP_FastPortable);
SetJitHelperFunction(CORINFO_HELP_NEWARR_1_VC, JIT_NewArr1VC_MP_FastPortable);
SetJitHelperFunction(CORINFO_HELP_NEWARR_1_OBJ, JIT_NewArr1OBJ_MP_FastPortable);
ECall::DynamicallyAssignFCallImpl(GetEEFuncEntryPoint(AllocateString_MP_FastPortable), ECall::FastAllocateString);
}
}
UpdateWriteBarrierState(GCHeapUtilities::IsServerHeap());
}
#else
void UpdateWriteBarrierState(bool) {}
#endif // !defined(DACCESS_COMPILE)
PTR_CONTEXT GetCONTEXTFromRedirectedStubStackFrame(T_DISPATCHER_CONTEXT * pDispatcherContext)
{
LIMITED_METHOD_DAC_CONTRACT;
DWORD64 stackSlot = pDispatcherContext->EstablisherFrame + REDIRECTSTUB_SP_OFFSET_CONTEXT;
PTR_PTR_CONTEXT ppContext = dac_cast<PTR_PTR_CONTEXT>((TADDR)stackSlot);
return *ppContext;
}
PTR_CONTEXT GetCONTEXTFromRedirectedStubStackFrame(T_CONTEXT * pContext)
{
LIMITED_METHOD_DAC_CONTRACT;
DWORD64 stackSlot = pContext->Sp + REDIRECTSTUB_SP_OFFSET_CONTEXT;
PTR_PTR_CONTEXT ppContext = dac_cast<PTR_PTR_CONTEXT>((TADDR)stackSlot);
return *ppContext;
}
void RedirectForThreadAbort()
{
// ThreadAbort is not supported in .net core
throw "NYI";
}
#if !defined(DACCESS_COMPILE)
FaultingExceptionFrame *GetFrameFromRedirectedStubStackFrame (DISPATCHER_CONTEXT *pDispatcherContext)
{
LIMITED_METHOD_CONTRACT;
return (FaultingExceptionFrame*)((TADDR)pDispatcherContext->ContextRecord->S0);
}
BOOL
AdjustContextForVirtualStub(
EXCEPTION_RECORD *pExceptionRecord,
CONTEXT *pContext)
{
LIMITED_METHOD_CONTRACT;
Thread * pThread = GetThreadNULLOk();
// We may not have a managed thread object. Example is an AV on the helper thread.
// (perhaps during StubManager::IsStub)
if (pThread == NULL)
{
return FALSE;
}
PCODE f_IP = GetIP(pContext);
VirtualCallStubManager::StubKind sk;
VirtualCallStubManager::FindStubManager(f_IP, &sk);
if (sk == VirtualCallStubManager::SK_DISPATCH)
{
if (*PTR_DWORD(f_IP - 4) != DISPATCH_STUB_FIRST_DWORD)
{
_ASSERTE(!"AV in DispatchStub at unknown instruction");
return FALSE;
}
}
else
if (sk == VirtualCallStubManager::SK_RESOLVE)