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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.
// See the LICENSE file in the project root for more information.
//
// File: stubs.cpp
//
// This file contains stub functions for unimplemented features need to
// run on the ARM64 platform.
#include "common.h"
#include "dllimportcallback.h"
#include "comdelegate.h"
#include "asmconstants.h"
#include "virtualcallstub.h"
#include "jitinterface.h"
#include "ecall.h"
EXTERN_C void JIT_UpdateWriteBarrierState(bool skipEphemeralCheck);
#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(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 || "ARM64:NYI - CompareAndBranchInstructionFormat::CanReach external");
if (fExternal)
return false;
if (offset < -1048576 || offset > 1048572)
return false;
return true;
}
// 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 *pOutBuffer, UINT variationCode, BYTE *pDataBuffer)
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(refSize == InstructionFormat::k32);
if (fixedUpReference < -1048576 || fixedUpReference > 1048572)
COMPlusThrow(kNotSupportedException);
_ASSERTE((fixedUpReference & 0x3) == 0);
DWORD imm19 = (DWORD)(0x7FFFF & (fixedUpReference >> 2));
pOutBuffer[0] = static_cast<BYTE>((0x7 & imm19 /* Bits2-0(imm19) */) << 5 | (0xF & variationCode /* cond */));
pOutBuffer[1] = static_cast<BYTE>((0x7F8 & imm19 /* Bits10-3(imm19) */) >> 3);
pOutBuffer[2] = static_cast<BYTE>((0x7F800 & imm19 /* Bits19-11(imm19) */) >> 11);
pOutBuffer[3] = static_cast<BYTE>(0x54);
}
};
//-----------------------------------------------------------------------
// InstructionFormat for B(L)(R) (unconditional branch)
//-----------------------------------------------------------------------
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- (BL(R)) or not (B(R))
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 12;
else
return 8;
}
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 >= -134217728 && offset <= 134217724) || (refSize == InstructionFormat::k64));
}
}
virtual VOID EmitInstruction(UINT refSize, __int64 fixedUpReference, BYTE *pOutBuffer, UINT variationCode, BYTE *pDataBuffer)
{
LIMITED_METHOD_CONTRACT;
if (IsIndirect(variationCode))
{
_ASSERTE(((UINT_PTR)pDataBuffer & 7) == 0);
__int64 dataOffset = pDataBuffer - pOutBuffer;
if (dataOffset < -1048576 || dataOffset > 1048572)
COMPlusThrow(kNotSupportedException);
DWORD imm19 = (DWORD)(0x7FFFF & (dataOffset >> 2));
// +0: ldr x16, [pc, #dataOffset]
// +4: ldr x16, [x16]
// +8: b(l)r x16
*((DWORD*)pOutBuffer) = (0x58000010 | (imm19 << 5));
*((DWORD*)(pOutBuffer+4)) = 0xF9400210;
if (IsCall(variationCode))
{
*((DWORD*)(pOutBuffer+8)) = 0xD63F0200; // blr x16
}
else
{
*((DWORD*)(pOutBuffer+8)) = 0xD61F0200; // br x16
}
*((__int64*)pDataBuffer) = fixedUpReference + (__int64)pOutBuffer;
}
else
{
_ASSERTE(((UINT_PTR)pDataBuffer & 7) == 0);
__int64 dataOffset = pDataBuffer - pOutBuffer;
if (dataOffset < -1048576 || dataOffset > 1048572)
COMPlusThrow(kNotSupportedException);
DWORD imm19 = (DWORD)(0x7FFFF & (dataOffset >> 2));
// +0: ldr x16, [pc, #dataOffset]
// +4: b(l)r x16
*((DWORD*)pOutBuffer) = (0x58000010 | (imm19 << 5));
if (IsCall(variationCode))
{
*((DWORD*)(pOutBuffer+4)) = 0xD63F0200; // blr x16
}
else
{
*((DWORD*)(pOutBuffer+4)) = 0xD61F0200; // br x16
}
if (!ClrSafeInt<__int64>::addition(fixedUpReference, (__int64)pOutBuffer, fixedUpReference))
COMPlusThrowArithmetic();
*((__int64*)pDataBuffer) = fixedUpReference;
}
}
};
//-----------------------------------------------------------------------
// InstructionFormat for loading a label to the register (ADRP/ADR)
//-----------------------------------------------------------------------
class LoadFromLabelInstructionFormat : public InstructionFormat
{
public:
LoadFromLabelInstructionFormat() : InstructionFormat( InstructionFormat::k32)
{
LIMITED_METHOD_CONTRACT;
}
virtual UINT GetSizeOfInstruction(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)
{
return fExternal;
}
virtual VOID EmitInstruction(UINT refSize, __int64 fixedUpReference, BYTE *pOutBuffer, UINT variationCode, BYTE *pDataBuffer)
{
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);
// Can't use SP or XZR
_ASSERTE((variationCode & 0x1F) != 31);
// adrp Xt, #Page_of_fixedUpReference
*((DWORD*)pOutBuffer) = ((9<<28) | ((imm & 3)<<29) | (imm>>2)<<5 | (variationCode&0x1F));
// ldr Xt, [Xt, #offset_of_fixedUpReference_to_its_page]
UINT64 target = (UINT64)(fixedUpReference + pOutBuffer)>>3;
*((DWORD*)(pOutBuffer+4)) = ( 0xF9400000 | ((target & 0x1FF)<<10) | (variationCode & 0x1F)<<5 | (variationCode & 0x1F));
}
};
static BYTE gConditionalBranchIF[sizeof(ConditionalBranchInstructionFormat)];
static BYTE gBranchIF[sizeof(BranchInstructionFormat)];
static BYTE gLoadFromLabelIF[sizeof(LoadFromLabelInstructionFormat)];
#endif
void ClearRegDisplayArgumentAndScratchRegisters(REGDISPLAY * pRD)
{
for (int i=0; i < 18; i++)
pRD->volatileCurrContextPointers.X[i] = NULL;
}
#ifndef CROSSGEN_COMPILE
void LazyMachState::unwindLazyState(LazyMachState* baseState,
MachState* unwoundstate,
DWORD threadId,
int funCallDepth,
HostCallPreference hostCallPreference)
{
T_CONTEXT context;
T_KNONVOLATILE_CONTEXT_POINTERS nonVolContextPtrs;
context.X19 = unwoundstate->captureX19_X29[0] = baseState->captureX19_X29[0];
context.X20 = unwoundstate->captureX19_X29[1] = baseState->captureX19_X29[1];
context.X21 = unwoundstate->captureX19_X29[2] = baseState->captureX19_X29[2];
context.X22 = unwoundstate->captureX19_X29[3] = baseState->captureX19_X29[3];
context.X23 = unwoundstate->captureX19_X29[4] = baseState->captureX19_X29[4];
context.X24 = unwoundstate->captureX19_X29[5] = baseState->captureX19_X29[5];
context.X25 = unwoundstate->captureX19_X29[6] = baseState->captureX19_X29[6];
context.X26 = unwoundstate->captureX19_X29[7] = baseState->captureX19_X29[7];
context.X27 = unwoundstate->captureX19_X29[8] = baseState->captureX19_X29[8];
context.X28 = unwoundstate->captureX19_X29[9] = baseState->captureX19_X29[9];
context.Fp = unwoundstate->captureX19_X29[10] = baseState->captureX19_X29[10];
context.Lr = 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.X19 = &unwoundstate->captureX19_X29[0];
nonVolContextPtrs.X20 = &unwoundstate->captureX19_X29[1];
nonVolContextPtrs.X21 = &unwoundstate->captureX19_X29[2];
nonVolContextPtrs.X22 = &unwoundstate->captureX19_X29[3];
nonVolContextPtrs.X23 = &unwoundstate->captureX19_X29[4];
nonVolContextPtrs.X24 = &unwoundstate->captureX19_X29[5];
nonVolContextPtrs.X25 = &unwoundstate->captureX19_X29[6];
nonVolContextPtrs.X26 = &unwoundstate->captureX19_X29[7];
nonVolContextPtrs.X27 = &unwoundstate->captureX19_X29[8];
nonVolContextPtrs.X28 = &unwoundstate->captureX19_X29[9];
nonVolContextPtrs.Fp = &unwoundstate->captureX19_X29[10];
nonVolContextPtrs.Lr = 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 FEATURE_PAL
pvControlPc = Thread::VirtualUnwindCallFrame(&context, &nonVolContextPtrs);
#else // !FEATURE_PAL
#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 // !FEATURE_PAL
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 FEATURE_PAL
unwoundstate->captureX19_X29[0] = context.X19;
unwoundstate->captureX19_X29[1] = context.X20;
unwoundstate->captureX19_X29[2] = context.X21;
unwoundstate->captureX19_X29[3] = context.X22;
unwoundstate->captureX19_X29[4] = context.X23;
unwoundstate->captureX19_X29[5] = context.X24;
unwoundstate->captureX19_X29[6] = context.X25;
unwoundstate->captureX19_X29[7] = context.X26;
unwoundstate->captureX19_X29[8] = context.X27;
unwoundstate->captureX19_X29[9] = context.X28;
unwoundstate->captureX19_X29[10] = context.Fp;
#endif
#ifdef DACCESS_COMPILE
// For DAC builds, we update the registers directly since we dont have context pointers
unwoundstate->captureX19_X29[0] = context.X19;
unwoundstate->captureX19_X29[1] = context.X20;
unwoundstate->captureX19_X29[2] = context.X21;
unwoundstate->captureX19_X29[3] = context.X22;
unwoundstate->captureX19_X29[4] = context.X23;
unwoundstate->captureX19_X29[5] = context.X24;
unwoundstate->captureX19_X29[6] = context.X25;
unwoundstate->captureX19_X29[7] = context.X26;
unwoundstate->captureX19_X29[8] = context.X27;
unwoundstate->captureX19_X29[9] = context.X28;
unwoundstate->captureX19_X29[10] = context.Fp;
#else // !DACCESS_COMPILE
// For non-DAC builds, update the register state from context pointers
unwoundstate->ptrX19_X29[0] = nonVolContextPtrs.X19;
unwoundstate->ptrX19_X29[1] = nonVolContextPtrs.X20;
unwoundstate->ptrX19_X29[2] = nonVolContextPtrs.X21;
unwoundstate->ptrX19_X29[3] = nonVolContextPtrs.X22;
unwoundstate->ptrX19_X29[4] = nonVolContextPtrs.X23;
unwoundstate->ptrX19_X29[5] = nonVolContextPtrs.X24;
unwoundstate->ptrX19_X29[6] = nonVolContextPtrs.X25;
unwoundstate->ptrX19_X29[7] = nonVolContextPtrs.X26;
unwoundstate->ptrX19_X29[8] = nonVolContextPtrs.X27;
unwoundstate->ptrX19_X29[9] = nonVolContextPtrs.X28;
unwoundstate->ptrX19_X29[10] = nonVolContextPtrs.Fp;
#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->X19 = (DWORD64)(pUnwoundState->captureX19_X29[0]);
pRD->pCurrentContext->X20 = (DWORD64)(pUnwoundState->captureX19_X29[1]);
pRD->pCurrentContext->X21 = (DWORD64)(pUnwoundState->captureX19_X29[2]);
pRD->pCurrentContext->X22 = (DWORD64)(pUnwoundState->captureX19_X29[3]);
pRD->pCurrentContext->X23 = (DWORD64)(pUnwoundState->captureX19_X29[4]);
pRD->pCurrentContext->X24 = (DWORD64)(pUnwoundState->captureX19_X29[5]);
pRD->pCurrentContext->X25 = (DWORD64)(pUnwoundState->captureX19_X29[6]);
pRD->pCurrentContext->X26 = (DWORD64)(pUnwoundState->captureX19_X29[7]);
pRD->pCurrentContext->X27 = (DWORD64)(pUnwoundState->captureX19_X29[8]);
pRD->pCurrentContext->X28 = (DWORD64)(pUnwoundState->captureX19_X29[9]);
pRD->pCurrentContext->Fp = (DWORD64)(pUnwoundState->captureX19_X29[10]);
pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
pRD->pCurrentContextPointers->X19 = pUnwoundState->ptrX19_X29[0];
pRD->pCurrentContextPointers->X20 = pUnwoundState->ptrX19_X29[1];
pRD->pCurrentContextPointers->X21 = pUnwoundState->ptrX19_X29[2];
pRD->pCurrentContextPointers->X22 = pUnwoundState->ptrX19_X29[3];
pRD->pCurrentContextPointers->X23 = pUnwoundState->ptrX19_X29[4];
pRD->pCurrentContextPointers->X24 = pUnwoundState->ptrX19_X29[5];
pRD->pCurrentContextPointers->X25 = pUnwoundState->ptrX19_X29[6];
pRD->pCurrentContextPointers->X26 = pUnwoundState->ptrX19_X29[7];
pRD->pCurrentContextPointers->X27 = pUnwoundState->ptrX19_X29[8];
pRD->pCurrentContextPointers->X28 = pUnwoundState->ptrX19_X29[9];
pRD->pCurrentContextPointers->Fp = pUnwoundState->ptrX19_X29[10];
pRD->pCurrentContextPointers->Lr = 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 FEATURE_PAL
pRD->pCurrentContext->X19 = m_MachState.ptrX19_X29[0] ? *m_MachState.ptrX19_X29[0] : m_MachState.captureX19_X29[0];
pRD->pCurrentContext->X20 = m_MachState.ptrX19_X29[1] ? *m_MachState.ptrX19_X29[1] : m_MachState.captureX19_X29[1];
pRD->pCurrentContext->X21 = m_MachState.ptrX19_X29[2] ? *m_MachState.ptrX19_X29[2] : m_MachState.captureX19_X29[2];
pRD->pCurrentContext->X22 = m_MachState.ptrX19_X29[3] ? *m_MachState.ptrX19_X29[3] : m_MachState.captureX19_X29[3];
pRD->pCurrentContext->X23 = m_MachState.ptrX19_X29[4] ? *m_MachState.ptrX19_X29[4] : m_MachState.captureX19_X29[4];
pRD->pCurrentContext->X24 = m_MachState.ptrX19_X29[5] ? *m_MachState.ptrX19_X29[5] : m_MachState.captureX19_X29[5];
pRD->pCurrentContext->X25 = m_MachState.ptrX19_X29[6] ? *m_MachState.ptrX19_X29[6] : m_MachState.captureX19_X29[6];
pRD->pCurrentContext->X26 = m_MachState.ptrX19_X29[7] ? *m_MachState.ptrX19_X29[7] : m_MachState.captureX19_X29[7];
pRD->pCurrentContext->X27 = m_MachState.ptrX19_X29[8] ? *m_MachState.ptrX19_X29[8] : m_MachState.captureX19_X29[8];
pRD->pCurrentContext->X28 = m_MachState.ptrX19_X29[9] ? *m_MachState.ptrX19_X29[9] : m_MachState.captureX19_X29[9];
pRD->pCurrentContext->Fp = m_MachState.ptrX19_X29[10] ? *m_MachState.ptrX19_X29[10] : m_MachState.captureX19_X29[10];
pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
#else // FEATURE_PAL
pRD->pCurrentContext->X19 = *m_MachState.ptrX19_X29[0];
pRD->pCurrentContext->X20 = *m_MachState.ptrX19_X29[1];
pRD->pCurrentContext->X21 = *m_MachState.ptrX19_X29[2];
pRD->pCurrentContext->X22 = *m_MachState.ptrX19_X29[3];
pRD->pCurrentContext->X23 = *m_MachState.ptrX19_X29[4];
pRD->pCurrentContext->X24 = *m_MachState.ptrX19_X29[5];
pRD->pCurrentContext->X25 = *m_MachState.ptrX19_X29[6];
pRD->pCurrentContext->X26 = *m_MachState.ptrX19_X29[7];
pRD->pCurrentContext->X27 = *m_MachState.ptrX19_X29[8];
pRD->pCurrentContext->X28 = *m_MachState.ptrX19_X29[9];
pRD->pCurrentContext->Fp = *m_MachState.ptrX19_X29[10];
pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
#endif
#if !defined(DACCESS_COMPILE)
pRD->pCurrentContextPointers->X19 = m_MachState.ptrX19_X29[0];
pRD->pCurrentContextPointers->X20 = m_MachState.ptrX19_X29[1];
pRD->pCurrentContextPointers->X21 = m_MachState.ptrX19_X29[2];
pRD->pCurrentContextPointers->X22 = m_MachState.ptrX19_X29[3];
pRD->pCurrentContextPointers->X23 = m_MachState.ptrX19_X29[4];
pRD->pCurrentContextPointers->X24 = m_MachState.ptrX19_X29[5];
pRD->pCurrentContextPointers->X25 = m_MachState.ptrX19_X29[6];
pRD->pCurrentContextPointers->X26 = m_MachState.ptrX19_X29[7];
pRD->pCurrentContextPointers->X27 = m_MachState.ptrX19_X29[8];
pRD->pCurrentContextPointers->X28 = m_MachState.ptrX19_X29[9];
pRD->pCurrentContextPointers->Fp = m_MachState.ptrX19_X29[10];
pRD->pCurrentContextPointers->Lr = NULL; // Unwind again to get Caller's PC
#endif
ClearRegDisplayArgumentAndScratchRegisters(pRD);
}
#endif // CROSSGEN_COMPILE
TADDR FixupPrecode::GetMethodDesc()
{
LIMITED_METHOD_DAC_CONTRACT;
// This lookup is also manually inlined in PrecodeFixupThunk assembly code
TADDR base = *PTR_TADDR(GetBase());
if (base == NULL)
return NULL;
return base + (m_MethodDescChunkIndex * MethodDesc::ALIGNMENT);
}
#ifdef DACCESS_COMPILE
void FixupPrecode::EnumMemoryRegions(CLRDataEnumMemoryFlags flags)
{
SUPPORTS_DAC;
DacEnumMemoryRegion(dac_cast<TADDR>(this), sizeof(FixupPrecode));
DacEnumMemoryRegion(GetBase(), sizeof(TADDR));
}
#endif // DACCESS_COMPILE
#ifndef DACCESS_COMPILE
void StubPrecode::Init(MethodDesc* pMD, LoaderAllocator *pLoaderAllocator)
{
WRAPPER_NO_CONTRACT;
int n = 0;
m_rgCode[n++] = 0x10000089; // adr x9, #16
m_rgCode[n++] = 0xA940312A; // ldp x10,x12,[x9]
m_rgCode[n++] = 0xD61F0140; // br x10
_ASSERTE(n+1 == _countof(m_rgCode));
m_pTarget = GetPreStubEntryPoint();
m_pMethodDesc = (TADDR)pMD;
}
#ifdef FEATURE_NATIVE_IMAGE_GENERATION
void StubPrecode::Fixup(DataImage *image)
{
WRAPPER_NO_CONTRACT;
image->FixupFieldToNode(this, offsetof(StubPrecode, m_pTarget),
image->GetHelperThunk(CORINFO_HELP_EE_PRESTUB),
0,
IMAGE_REL_BASED_PTR);
image->FixupField(this, offsetof(StubPrecode, m_pMethodDesc),
(void*)GetMethodDesc(),
0,
IMAGE_REL_BASED_PTR);
}
#endif // FEATURE_NATIVE_IMAGE_GENERATION
void NDirectImportPrecode::Init(MethodDesc* pMD, LoaderAllocator *pLoaderAllocator)
{
WRAPPER_NO_CONTRACT;
int n = 0;
m_rgCode[n++] = 0x1000008B; // adr x11, #16
m_rgCode[n++] = 0xA940316A; // ldp x10,x12,[x11]
m_rgCode[n++] = 0xD61F0140; // br x10
_ASSERTE(n+1 == _countof(m_rgCode));
m_pTarget = GetEEFuncEntryPoint(NDirectImportThunk);
m_pMethodDesc = (TADDR)pMD;
}
#ifdef FEATURE_NATIVE_IMAGE_GENERATION
void NDirectImportPrecode::Fixup(DataImage *image)
{
WRAPPER_NO_CONTRACT;
image->FixupField(this, offsetof(NDirectImportPrecode, m_pMethodDesc),
(void*)GetMethodDesc(),
0,
IMAGE_REL_BASED_PTR);
image->FixupFieldToNode(this, offsetof(NDirectImportPrecode, m_pTarget),
image->GetHelperThunk(CORINFO_HELP_EE_PINVOKE_FIXUP),
0,
IMAGE_REL_BASED_PTR);
}
#endif
void FixupPrecode::Init(MethodDesc* pMD, LoaderAllocator *pLoaderAllocator, int iMethodDescChunkIndex /*=0*/, int iPrecodeChunkIndex /*=0*/)
{
WRAPPER_NO_CONTRACT;
InitCommon();
// Initialize chunk indices only if they are not initialized yet. This is necessary to make MethodDesc::Reset work.
if (m_PrecodeChunkIndex == 0)
{
_ASSERTE(FitsInU1(iPrecodeChunkIndex));
m_PrecodeChunkIndex = static_cast<BYTE>(iPrecodeChunkIndex);
}
if (iMethodDescChunkIndex != -1)
{
if (m_MethodDescChunkIndex == 0)
{
_ASSERTE(FitsInU1(iMethodDescChunkIndex));
m_MethodDescChunkIndex = static_cast<BYTE>(iMethodDescChunkIndex);
}
if (*(void**)GetBase() == NULL)
*(void**)GetBase() = (BYTE*)pMD - (iMethodDescChunkIndex * MethodDesc::ALIGNMENT);
}
_ASSERTE(GetMethodDesc() == (TADDR)pMD);
if (pLoaderAllocator != NULL)
{
m_pTarget = GetEEFuncEntryPoint(PrecodeFixupThunk);
}
}
#ifdef FEATURE_NATIVE_IMAGE_GENERATION
// Partial initialization. Used to save regrouped chunks.
void FixupPrecode::InitForSave(int iPrecodeChunkIndex)
{
STANDARD_VM_CONTRACT;
InitCommon();
_ASSERTE(FitsInU1(iPrecodeChunkIndex));
m_PrecodeChunkIndex = static_cast<BYTE>(iPrecodeChunkIndex);
// The rest is initialized in code:FixupPrecode::Fixup
}
void FixupPrecode::Fixup(DataImage *image, MethodDesc * pMD)
{
STANDARD_VM_CONTRACT;
// Note that GetMethodDesc() does not return the correct value because of
// regrouping of MethodDescs into hot and cold blocks. That's why the caller
// has to supply the actual MethodDesc
SSIZE_T mdChunkOffset;
ZapNode * pMDChunkNode = image->GetNodeForStructure(pMD, &mdChunkOffset);
ZapNode * pHelperThunk = image->GetHelperThunk(CORINFO_HELP_EE_PRECODE_FIXUP);
image->FixupFieldToNode(this, offsetof(FixupPrecode, m_pTarget), pHelperThunk);
// Set the actual chunk index
FixupPrecode * pNewPrecode = (FixupPrecode *)image->GetImagePointer(this);
size_t mdOffset = mdChunkOffset - sizeof(MethodDescChunk);
size_t chunkIndex = mdOffset / MethodDesc::ALIGNMENT;
_ASSERTE(FitsInU1(chunkIndex));
pNewPrecode->m_MethodDescChunkIndex = (BYTE)chunkIndex;
// Fixup the base of MethodDescChunk
if (m_PrecodeChunkIndex == 0)
{
image->FixupFieldToNode(this, (BYTE *)GetBase() - (BYTE *)this,
pMDChunkNode, sizeof(MethodDescChunk));
}
}
#endif // FEATURE_NATIVE_IMAGE_GENERATION
void ThisPtrRetBufPrecode::Init(MethodDesc* pMD, LoaderAllocator *pLoaderAllocator)
{
WRAPPER_NO_CONTRACT;
int n = 0;
//Initially
//x0 -This ptr
//x1 -ReturnBuffer
m_rgCode[n++] = 0x91000010; // mov x16, x0
m_rgCode[n++] = 0x91000020; // mov x0, x1
m_rgCode[n++] = 0x91000201; // mov x1, x16
m_rgCode[n++] = 0x58000070; // ldr x16, [pc, #12]
_ASSERTE((UINT32*)&m_pTarget == &m_rgCode[n + 2]);
m_rgCode[n++] = 0xd61f0200; // br x16
n++; // empty 4 bytes for data alignment below
_ASSERTE(n == _countof(m_rgCode));
m_pTarget = GetPreStubEntryPoint();
m_pMethodDesc = (TADDR)pMD;
}
#ifndef CROSSGEN_COMPILE
BOOL DoesSlotCallPrestub(PCODE pCode)
{
PTR_DWORD pInstr = dac_cast<PTR_DWORD>(PCODEToPINSTR(pCode));
//FixupPrecode
#if defined(HAS_FIXUP_PRECODE)
if (FixupPrecode::IsFixupPrecodeByASM(pCode))
{
PCODE pTarget = dac_cast<PTR_FixupPrecode>(pInstr)->m_pTarget;
if (isJump(pTarget))
{
pTarget = decodeJump(pTarget);
}
return pTarget == (TADDR)PrecodeFixupThunk;
}
#endif
// StubPrecode
if (pInstr[0] == 0x10000089 && // adr x9, #16
pInstr[1] == 0xA940312A && // ldp x10,x12,[x9]
pInstr[2] == 0xD61F0140) // br x10
{
PCODE pTarget = dac_cast<PTR_StubPrecode>(pInstr)->m_pTarget;
if (isJump(pTarget))
{
pTarget = decodeJump(pTarget);
}
return pTarget == GetPreStubEntryPoint();
}
return FALSE;
}
#endif // CROSSGEN_COMPILE
#endif // !DACCESS_COMPILE
void UpdateRegDisplayFromCalleeSavedRegisters(REGDISPLAY * pRD, CalleeSavedRegisters * pCalleeSaved)
{
LIMITED_METHOD_CONTRACT;
pRD->pCurrentContext->X19 = pCalleeSaved->x19;
pRD->pCurrentContext->X20 = pCalleeSaved->x20;
pRD->pCurrentContext->X21 = pCalleeSaved->x21;
pRD->pCurrentContext->X22 = pCalleeSaved->x22;
pRD->pCurrentContext->X23 = pCalleeSaved->x23;
pRD->pCurrentContext->X24 = pCalleeSaved->x24;
pRD->pCurrentContext->X25 = pCalleeSaved->x25;
pRD->pCurrentContext->X26 = pCalleeSaved->x26;
pRD->pCurrentContext->X27 = pCalleeSaved->x27;
pRD->pCurrentContext->X28 = pCalleeSaved->x28;
pRD->pCurrentContext->Fp = pCalleeSaved->x29;
pRD->pCurrentContext->Lr = pCalleeSaved->x30;
T_KNONVOLATILE_CONTEXT_POINTERS * pContextPointers = pRD->pCurrentContextPointers;
pContextPointers->X19 = (PDWORD64)&pCalleeSaved->x19;
pContextPointers->X20 = (PDWORD64)&pCalleeSaved->x20;
pContextPointers->X21 = (PDWORD64)&pCalleeSaved->x21;
pContextPointers->X22 = (PDWORD64)&pCalleeSaved->x22;
pContextPointers->X23 = (PDWORD64)&pCalleeSaved->x23;
pContextPointers->X24 = (PDWORD64)&pCalleeSaved->x24;
pContextPointers->X25 = (PDWORD64)&pCalleeSaved->x25;
pContextPointers->X26 = (PDWORD64)&pCalleeSaved->x26;
pContextPointers->X27 = (PDWORD64)&pCalleeSaved->x27;
pContextPointers->X28 = (PDWORD64)&pCalleeSaved->x28;
pContextPointers->Fp = (PDWORD64)&pCalleeSaved->x29;
pContextPointers->Lr = (PDWORD64)&pCalleeSaved->x30;
}
#ifndef CROSSGEN_COMPILE
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->x29;
pRD->pCurrentContext->Lr = pCalleeSaved->x30;
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));
}
#endif
#ifndef CROSSGEN_COMPILE
void TailCallFrame::UpdateRegDisplay(const PREGDISPLAY pRD)
{
LOG((LF_GCROOTS, LL_INFO100000, "STACKWALK TailCallFrame::UpdateRegDisplay(pc:%p, sp:%p)\n", pRD->ControlPC, pRD->SP));
_ASSERTE(!"ARM64:NYI");
}
#ifndef DACCESS_COMPILE
void TailCallFrame::InitFromContext(T_CONTEXT * pContext)
{
_ASSERTE(!"ARM64:NYI");
}
#endif // !DACCESS_COMPILE
#endif // CROSSGEN_COMPILE
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->X19 = (PDWORD64)&m_ctx.X19;
pRD->pCurrentContextPointers->X20 = (PDWORD64)&m_ctx.X20;
pRD->pCurrentContextPointers->X21 = (PDWORD64)&m_ctx.X21;
pRD->pCurrentContextPointers->X22 = (PDWORD64)&m_ctx.X22;
pRD->pCurrentContextPointers->X23 = (PDWORD64)&m_ctx.X23;
pRD->pCurrentContextPointers->X24 = (PDWORD64)&m_ctx.X24;
pRD->pCurrentContextPointers->X25 = (PDWORD64)&m_ctx.X25;
pRD->pCurrentContextPointers->X26 = (PDWORD64)&m_ctx.X26;
pRD->pCurrentContextPointers->X27 = (PDWORD64)&m_ctx.X27;
pRD->pCurrentContextPointers->X28 = (PDWORD64)&m_ctx.X28;
pRD->pCurrentContextPointers->Fp = (PDWORD64)&m_ctx.Fp;
pRD->pCurrentContextPointers->Lr = (PDWORD64)&m_ctx.Lr;
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->X19 = NULL;
pRD->pCurrentContextPointers->X20 = NULL;
pRD->pCurrentContextPointers->X21 = NULL;
pRD->pCurrentContextPointers->X22 = NULL;
pRD->pCurrentContextPointers->X23 = NULL;
pRD->pCurrentContextPointers->X24 = NULL;
pRD->pCurrentContextPointers->X25 = NULL;
pRD->pCurrentContextPointers->X26 = NULL;
pRD->pCurrentContextPointers->X27 = NULL;
pRD->pCurrentContextPointers->X28 = NULL;
pRD->ControlPC = m_pCallerReturnAddress;
pRD->SP = (DWORD) 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->X19 = &m_Regs->X19;
pRD->pCurrentContextPointers->X20 = &m_Regs->X20;
pRD->pCurrentContextPointers->X21 = &m_Regs->X21;
pRD->pCurrentContextPointers->X22 = &m_Regs->X22;
pRD->pCurrentContextPointers->X23 = &m_Regs->X23;
pRD->pCurrentContextPointers->X24 = &m_Regs->X24;
pRD->pCurrentContextPointers->X25 = &m_Regs->X25;
pRD->pCurrentContextPointers->X26 = &m_Regs->X26;
pRD->pCurrentContextPointers->X27 = &m_Regs->X27;
pRD->pCurrentContextPointers->X28 = &m_Regs->X28;
pRD->pCurrentContextPointers->Fp = &m_Regs->Fp;
pRD->pCurrentContextPointers->Lr = &m_Regs->Lr;
for (int i=0; i < 18; i++)
pRD->volatileCurrContextPointers.X[i] = &m_Regs->X[i];
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;