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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: primitives.cpp
//
//
// Platform-specific debugger primitives
//
//*****************************************************************************
#include "primitives.h"
//
// CopyThreadContext() does an intelligent copy from pSrc to pDst,
// respecting the ContextFlags of both contexts.
//
void CORDbgCopyThreadContext(DT_CONTEXT* pDst, const DT_CONTEXT* pSrc)
{
ULONG dstFlags = pDst->ContextFlags;
ULONG srcFlags = pSrc->ContextFlags;
LOG((LF_CORDB, LL_INFO1000000,
"CP::CTC: pDst=0x%p dstFlags=0x%x, pSrc=0x%px srcFlags=0x%x\n",
pDst, dstFlags, pSrc, srcFlags));
// Unlike on X86 the AMD64 CONTEXT struct isn't nicely defined
// to facilitate copying sections based on the CONTEXT flags.
if ((dstFlags & srcFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
{
// SegCs
CopyContextChunk(&(pDst->SegCs), &(pSrc->SegCs), &(pDst->SegDs),
CONTEXT_CONTROL);
// SegSs, EFlags
CopyContextChunk(&(pDst->SegSs), &(pSrc->SegSs), &(pDst->Dr0),
CONTEXT_CONTROL);
// Rsp
CopyContextChunk(&(pDst->Rsp), &(pSrc->Rsp), &(pDst->Rbp),
CONTEXT_CONTROL);
// Rip
CopyContextChunk(&(pDst->Rip), &(pSrc->Rip), &(pDst->Xmm0),
CONTEXT_CONTROL);
}
if ((dstFlags & srcFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
{
// Rax, Rcx, Rdx, Rbx
CopyContextChunk(&(pDst->Rax), &(pSrc->Rax), &(pDst->Rsp),
CONTEXT_INTEGER);
// Rbp, Rsi, Rdi, R8-R15
CopyContextChunk(&(pDst->Rbp), &(pSrc->Rbp), &(pDst->Rip),
CONTEXT_INTEGET);
}
if ((dstFlags & srcFlags & CONTEXT_SEGMENTS) == CONTEXT_SEGMENTS)
{
// SegDs, SegEs, SegFs, SegGs
CopyContextChunk(&(pDst->SegDs), &(pSrc->SegDs), &(pDst->SegSs),
CONTEXT_SEGMENTS);
}
if ((dstFlags & srcFlags & CONTEXT_FLOATING_POINT) == CONTEXT_FLOATING_POINT)
{
// Xmm0-Xmm15
CopyContextChunk(&(pDst->Xmm0), &(pSrc->Xmm0), &(pDst->Xmm15) + sizeof(M128A),
CONTEXT_FLOATING_POINT);
// MxCsr
CopyContextChunk(&(pDst->MxCsr), &(pSrc->MxCsr), &(pDst->SegCs),
CONTEXT_FLOATING_POINT);
}
if ((dstFlags & srcFlags & CONTEXT_DEBUG_REGISTERS) == CONTEXT_DEBUG_REGISTERS)
{
// Dr0-Dr3, Dr6-Dr7
CopyContextChunk(&(pDst->Dr0), &(pSrc->Dr0), &(pDst->Rax),
CONTEXT_DEBUG_REGISTERS);
}
}
void CORDbgSetDebuggerREGDISPLAYFromContext(DebuggerREGDISPLAY* pDRD,
DT_CONTEXT* pContext)
{
DWORD flags = pContext->ContextFlags;
if ((flags & DT_CONTEXT_CONTROL) == DT_CONTEXT_CONTROL)
{
pDRD->PC = (SIZE_T)CORDbgGetIP(pContext);
pDRD->SP = (SIZE_T)CORDbgGetSP(pContext);
}
if ((flags & DT_CONTEXT_INTEGER) == DT_CONTEXT_INTEGER)
{
pDRD->Rax = pContext->Rax;
pDRD->Rcx = pContext->Rcx;
pDRD->Rdx = pContext->Rdx;
pDRD->Rbx = pContext->Rbx;
pDRD->Rbp = pContext->Rbp;
pDRD->Rsi = pContext->Rsi;
pDRD->Rdi = pContext->Rdi;
pDRD->R8 = pContext->R8;
pDRD->R9 = pContext->R9;
pDRD->R10 = pContext->R10;
pDRD->R11 = pContext->R11;
pDRD->R12 = pContext->R12;
pDRD->R13 = pContext->R13;
pDRD->R14 = pContext->R14;
pDRD->R15 = pContext->R15;
}
}
#if defined(ALLOW_VMPTR_ACCESS) || !defined(RIGHT_SIDE_COMPILE)
void SetDebuggerREGDISPLAYFromREGDISPLAY(DebuggerREGDISPLAY* pDRD, REGDISPLAY* pRD)
{
SUPPORTS_DAC_HOST_ONLY;
// CORDbgSetDebuggerREGDISPLAYFromContext() checks the context flags. In cases where we don't have a filter
// context from the thread, we initialize a CONTEXT on the stack and use that to do our stack walking. We never
// initialize the context flags in such cases. Since this function is called from the stackwalker, we can
// guarantee that the integer, control, and floating point sections are valid. So we set the flags here and
// restore them afterwards.
DWORD contextFlags = pRD->pCurrentContext->ContextFlags;
pRD->pCurrentContext->ContextFlags = CONTEXT_FULL;
// This doesn't set the pointers, only the values
CORDbgSetDebuggerREGDISPLAYFromContext(pDRD, reinterpret_cast<DT_CONTEXT *>(pRD->pCurrentContext)); // MACTODO: KLUDGE UNDO Microsoft
pRD->pCurrentContext->ContextFlags = contextFlags;
// These pointers are always valid so we don't need to test them using PushedRegAddr
#if defined(USE_REMOTE_REGISTER_ADDRESS)
pDRD->pRax = pRD->pCurrentContextPointers->Integer.Register.Rax;
pDRD->pRcx = pRD->pCurrentContextPointers->Integer.Register.Rcx;
pDRD->pRdx = pRD->pCurrentContextPointers->Integer.Register.Rdx;
pDRD->pRbx = pRD->pCurrentContextPointers->Integer.Register.Rbx;
pDRD->pRbp = pRD->pCurrentContextPointers->Integer.Register.Rbp;
pDRD->pRsi = pRD->pCurrentContextPointers->Integer.Register.Rsi;
pDRD->pRdi = pRD->pCurrentContextPointers->Integer.Register.Rdi;
pDRD->pR8 = pRD->pCurrentContextPointers->Integer.Register.R8;
pDRD->pR9 = pRD->pCurrentContextPointers->Integer.Register.R9;
pDRD->pR10 = pRD->pCurrentContextPointers->Integer.Register.R10;
pDRD->pR11 = pRD->pCurrentContextPointers->Integer.Register.R11;
pDRD->pR12 = pRD->pCurrentContextPointers->Integer.Register.R12;
pDRD->pR13 = pRD->pCurrentContextPointers->Integer.Register.R13;
pDRD->pR14 = pRD->pCurrentContextPointers->Integer.Register.R14;
pDRD->pR15 = pRD->pCurrentContextPointers->Integer.Register.R15;
#else // !USE_REMOTE_REGISTER_ADDRESS
pDRD->pRax = NULL;
pDRD->pRcx = NULL;
pDRD->pRdx = NULL;
pDRD->pRbx = NULL;
pDRD->pRbp = NULL;
pDRD->pRsi = NULL;
pDRD->pRdi = NULL;
pDRD->pR8 = NULL;
pDRD->pR9 = NULL;
pDRD->pR10 = NULL;
pDRD->pR11 = NULL;
pDRD->pR12 = NULL;
pDRD->pR13 = NULL;
pDRD->pR14 = NULL;
pDRD->pR15 = NULL;
#endif // USE_REMOTE_REGISTER_ADDRESS
pDRD->PC = pRD->ControlPC;
pDRD->SP = pRD->SP;
// Please leave RSP, RIP at the front so I don't have to scroll
// left to see the most important registers. Thanks!
LOG( (LF_CORDB, LL_INFO1000, "SDRFR:Registers:"
"Rsp = %p Rip = %p Rbp = %p Rdi = %p "
"Rsi = %p Rbx = %p Rdx = %p Rcx = %p Rax = %p"
"R8 = %p R9 = %p R10 = %p R11 = %p"
"R12 = %p R13 = %p R14 = %p R15 = %p\n",
pDRD->SP, pDRD->PC, pDRD->Rbp, pDRD->Rdi,
pDRD->Rsi, pDRD->Rbx, pDRD->Rdx, pDRD->Rcx, pDRD->Rax,
pDRD->R8, pDRD->R9, pDRD->R10, pDRD->R11, pDRD->R12,
pDRD->R13, pDRD->R14, pDRD->R15) );
}
#endif // ALLOW_VMPTR_ACCESS || !RIGHT_SIDE_COMPILE
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