void UpdateRegDisplayFromCalleeSavedRegisters(REGDISPLAY * pRD, CalleeSavedRegisters * pRegs)
{
LIMITED_METHOD_CONTRACT;
T_CONTEXT * pContext = pRD->pCurrentContext;
#define CALLEE_SAVED_REGISTER(regname) pContext->regname = pRegs->regname;
ENUM_CALLEE_SAVED_REGISTERS();
#undef CALLEE_SAVED_REGISTER
KNONVOLATILE_CONTEXT_POINTERS * pContextPointers = pRD->pCurrentContextPointers;
#define CALLEE_SAVED_REGISTER(regname) pContextPointers->regname = (PULONG64)&pRegs->regname;
ENUM_CALLEE_SAVED_REGISTERS();
#undef CALLEE_SAVED_REGISTER
}
void TailCallFrame::InitFromContext(T_CONTEXT * pContext)
{
WRAPPER_NO_CONTRACT;
#define CALLEE_SAVED_REGISTER(regname) m_calleeSavedRegisters.regname = pContext->regname;
ENUM_CALLEE_SAVED_REGISTERS();
#undef CALLEE_SAVED_REGISTER
m_pGCLayout = 0;
m_ReturnAddress = pContext->Rip;
}
/*++
Routine Description:
This function virtually unwinds the specified function by executing its
prologue code backward or its epilogue code forward.
If a context pointers record is specified, then the address where each
nonvolatile registers is restored from is recorded in the appropriate
element of the context pointers record.
Arguments:
HandlerType - Supplies the handler type expected for the virtual unwind.
This may be either an exception or an unwind handler. A flag may
optionally be supplied to avoid epilogue detection if it is known
the specified control PC is not located inside a function epilogue.
ImageBase - Supplies the base address of the image that contains the
function being unwound.
ControlPc - Supplies the address where control left the specified
function.
FunctionEntry - Supplies the address of the function table entry for the
specified function.
ContextRecord - Supplies the address of a context record.
HandlerData - Supplies a pointer to a variable that receives a pointer
the the language handler data.
EstablisherFrame - Supplies a pointer to a variable that receives the
the establisher frame pointer value.
ContextPointers - Supplies an optional pointer to a context pointers
record.
HandlerRoutine - Supplies an optional pointer to a variable that receives
the handler routine address. If control did not leave the specified
function in either the prologue or an epilogue and a handler of the
proper type is associated with the function, then the address of the
language specific exception handler is returned. Otherwise, NULL is
returned.
--*/
HRESULT
OOPStackUnwinderX86::VirtualUnwind(
__in DWORD HandlerType,
__in DWORD ImageBase,
__in DWORD ControlPc,
__in _PIMAGE_RUNTIME_FUNCTION_ENTRY FunctionEntry,
__inout PCONTEXT ContextRecord,
__out PVOID *HandlerData,
__out PDWORD EstablisherFrame,
__inout_opt PKNONVOLATILE_CONTEXT_POINTERS ContextPointers,
__deref_opt_out_opt PEXCEPTION_ROUTINE *HandlerRoutine
)
{
if (HandlerRoutine != NULL)
{
*HandlerRoutine = NULL;
}
REGDISPLAY rd;
FillRegDisplay(&rd, ContextRecord);
rd.SP = ContextRecord->ResumeEsp;
rd.PCTAddr = (UINT_PTR)&(ContextRecord->Eip);
if (ContextPointers)
{
rd.pCurrentContextPointers = ContextPointers;
}
CodeManState codeManState;
codeManState.dwIsSet = 0;
EECodeInfo codeInfo;
codeInfo.Init((PCODE) ControlPc);
if (!UnwindStackFrame(&rd, &codeInfo, UpdateAllRegs, &codeManState, NULL))
{
return HRESULT_FROM_WIN32(ERROR_READ_FAULT);
}
ContextRecord->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
#define ARGUMENT_AND_SCRATCH_REGISTER(reg) if (rd.pCurrentContextPointers->reg) ContextRecord->reg = *rd.pCurrentContextPointers->reg;
ENUM_ARGUMENT_AND_SCRATCH_REGISTERS();
#undef ARGUMENT_AND_SCRATCH_REGISTER
#define CALLEE_SAVED_REGISTER(reg) if (rd.pCurrentContextPointers->reg) ContextRecord->reg = *rd.pCurrentContextPointers->reg;
ENUM_CALLEE_SAVED_REGISTERS();
#undef CALLEE_SAVED_REGISTER
ContextRecord->Esp = rd.SP - codeInfo.GetCodeManager()->GetStackParameterSize(&codeInfo);
ContextRecord->ResumeEsp = rd.SP;
ContextRecord->Eip = rd.ControlPC;
// For x86, the value of Establisher Frame Pointer is Caller SP
//
// (Please refers to CLR ABI for details)
*EstablisherFrame = ContextRecord->Esp;
return S_OK;
}