/**
* Common worker for DBGFR3AddrFromSelOff and DBGFR3AddrFromSelInfoOff.
*/
static int dbgfR3AddrFromSelInfoOffWorker(PDBGFADDRESS pAddress, PCDBGFSELINFO pSelInfo, RTUINTPTR off)
{
if (pSelInfo->fFlags & (DBGFSELINFO_FLAGS_INVALID | DBGFSELINFO_FLAGS_NOT_PRESENT))
return pSelInfo->fFlags & DBGFSELINFO_FLAGS_NOT_PRESENT
? VERR_SELECTOR_NOT_PRESENT
: VERR_INVALID_SELECTOR;
/** @todo This all goes voodoo in long mode. */
/* check limit. */
if (DBGFSelInfoIsExpandDown(pSelInfo))
{
if ( !pSelInfo->u.Raw.Gen.u1Granularity
&& off > UINT32_C(0xffff))
return VERR_OUT_OF_SELECTOR_BOUNDS;
if (off <= pSelInfo->cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
}
else if (off > pSelInfo->cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
pAddress->FlatPtr = pSelInfo->GCPtrBase + off;
/** @todo fix all these selector tests! */
if ( !pSelInfo->GCPtrBase
&& pSelInfo->u.Raw.Gen.u1Granularity
&& pSelInfo->u.Raw.Gen.u1DefBig)
pAddress->fFlags = DBGFADDRESS_FLAGS_FLAT;
else if (pSelInfo->cbLimit <= UINT32_C(0xffff))
pAddress->fFlags = DBGFADDRESS_FLAGS_FAR16;
else if (pSelInfo->cbLimit <= UINT32_C(0xffffffff))
pAddress->fFlags = DBGFADDRESS_FLAGS_FAR32;
else
pAddress->fFlags = DBGFADDRESS_FLAGS_FAR64;
return VINF_SUCCESS;
}
/**
* @interface_method_impl{DBGCCMDHLP,pfnMemWrite}
*/
static DECLCALLBACK(int) dbgcHlpMemWrite(PDBGCCMDHLP pCmdHlp, const void *pvBuffer, size_t cbWrite, PCDBGCVAR pVarPointer, size_t *pcbWritten)
{
PDBGC pDbgc = DBGC_CMDHLP2DBGC(pCmdHlp);
DBGFADDRESS Address;
int rc;
/*
* Dummy check.
*/
if (cbWrite == 0)
{
if (*pcbWritten)
*pcbWritten = 0;
return VINF_SUCCESS;
}
/*
* Convert Far addresses getting size and the correct base address.
* Getting and checking the size is what makes this messy and slow.
*/
DBGCVAR Var = *pVarPointer;
switch (pVarPointer->enmType)
{
case DBGCVAR_TYPE_GC_FAR:
{
/* Use DBGFR3AddrFromSelOff for the conversion. */
Assert(pDbgc->pUVM);
rc = DBGFR3AddrFromSelOff(pDbgc->pUVM, pDbgc->idCpu, &Address, Var.u.GCFar.sel, Var.u.GCFar.off);
if (RT_FAILURE(rc))
return rc;
/* don't bother with flat selectors (for now). */
if (!DBGFADDRESS_IS_FLAT(&Address))
{
DBGFSELINFO SelInfo;
rc = DBGFR3SelQueryInfo(pDbgc->pUVM, pDbgc->idCpu, Address.Sel,
DBGFSELQI_FLAGS_DT_GUEST | DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE, &SelInfo);
if (RT_SUCCESS(rc))
{
RTGCUINTPTR cb; /* -1 byte */
if (DBGFSelInfoIsExpandDown(&SelInfo))
{
if ( !SelInfo.u.Raw.Gen.u1Granularity
&& Address.off > UINT16_C(0xffff))
return VERR_OUT_OF_SELECTOR_BOUNDS;
if (Address.off <= SelInfo.cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cb = (SelInfo.u.Raw.Gen.u1Granularity ? UINT32_C(0xffffffff) : UINT32_C(0xffff)) - Address.off;
}
else
{
if (Address.off > SelInfo.cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cb = SelInfo.cbLimit - Address.off;
}
if (cbWrite - 1 > cb)
{
if (!pcbWritten)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cbWrite = cb + 1;
}
}
}
Var.enmType = DBGCVAR_TYPE_GC_FLAT;
Var.u.GCFlat = Address.FlatPtr;
}
/* fall thru */
case DBGCVAR_TYPE_GC_FLAT:
rc = DBGFR3MemWrite(pDbgc->pUVM, pDbgc->idCpu,
DBGFR3AddrFromFlat(pDbgc->pUVM, &Address, Var.u.GCFlat),
pvBuffer, cbWrite);
if (pcbWritten && RT_SUCCESS(rc))
*pcbWritten = cbWrite;
return rc;
case DBGCVAR_TYPE_GC_PHYS:
rc = DBGFR3MemWrite(pDbgc->pUVM, pDbgc->idCpu,
DBGFR3AddrFromPhys(pDbgc->pUVM, &Address, Var.u.GCPhys),
pvBuffer, cbWrite);
if (pcbWritten && RT_SUCCESS(rc))
*pcbWritten = cbWrite;
return rc;
case DBGCVAR_TYPE_HC_FLAT:
case DBGCVAR_TYPE_HC_PHYS:
{
/*
* Copy HC memory page by page.
*/
if (pcbWritten)
*pcbWritten = 0;
while (cbWrite > 0)
{
/* convert to flat address */
DBGCVAR Var2;
rc = dbgcOpAddrFlat(pDbgc, &Var, DBGCVAR_CAT_ANY, &Var2);
if (RT_FAILURE(rc))
{
if (pcbWritten && *pcbWritten)
return -VERR_INVALID_POINTER;
return VERR_INVALID_POINTER;
}
/* calc size. */
size_t cbChunk = PAGE_SIZE;
cbChunk -= (uintptr_t)Var.u.pvHCFlat & PAGE_OFFSET_MASK;
if (cbChunk > cbWrite)
cbChunk = cbWrite;
/** @todo protect this!!! */
memcpy(Var2.u.pvHCFlat, pvBuffer, cbChunk);
/* advance */
if (Var.enmType == DBGCVAR_TYPE_HC_FLAT)
Var.u.pvHCFlat = (uint8_t *)Var.u.pvHCFlat + cbChunk;
else
Var.u.HCPhys += cbChunk;
pvBuffer = (uint8_t const *)pvBuffer + cbChunk;
if (pcbWritten)
*pcbWritten += cbChunk;
cbWrite -= cbChunk;
}
return VINF_SUCCESS;
}
default:
return VERR_NOT_IMPLEMENTED;
}
}
/**
* @interface_method_impl{DBGCCMDHLP,pfnMemRead}
*/
static DECLCALLBACK(int) dbgcHlpMemRead(PDBGCCMDHLP pCmdHlp, void *pvBuffer, size_t cbRead, PCDBGCVAR pVarPointer, size_t *pcbRead)
{
PDBGC pDbgc = DBGC_CMDHLP2DBGC(pCmdHlp);
DBGFADDRESS Address;
int rc;
/*
* Dummy check.
*/
if (cbRead == 0)
{
if (*pcbRead)
*pcbRead = 0;
return VINF_SUCCESS;
}
/*
* Convert Far addresses getting size and the correct base address.
* Getting and checking the size is what makes this messy and slow.
*/
DBGCVAR Var = *pVarPointer;
switch (pVarPointer->enmType)
{
case DBGCVAR_TYPE_GC_FAR:
/* Use DBGFR3AddrFromSelOff for the conversion. */
Assert(pDbgc->pUVM);
rc = DBGFR3AddrFromSelOff(pDbgc->pUVM, pDbgc->idCpu, &Address, Var.u.GCFar.sel, Var.u.GCFar.off);
if (RT_FAILURE(rc))
return rc;
/* don't bother with flat selectors (for now). */
if (!DBGFADDRESS_IS_FLAT(&Address))
{
DBGFSELINFO SelInfo;
rc = DBGFR3SelQueryInfo(pDbgc->pUVM, pDbgc->idCpu, Address.Sel,
DBGFSELQI_FLAGS_DT_GUEST | DBGFSELQI_FLAGS_DT_ADJ_64BIT_MODE, &SelInfo);
if (RT_SUCCESS(rc))
{
RTGCUINTPTR cb; /* -1 byte */
if (DBGFSelInfoIsExpandDown(&SelInfo))
{
if ( !SelInfo.u.Raw.Gen.u1Granularity
&& Address.off > UINT16_C(0xffff))
return VERR_OUT_OF_SELECTOR_BOUNDS;
if (Address.off <= SelInfo.cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cb = (SelInfo.u.Raw.Gen.u1Granularity ? UINT32_C(0xffffffff) : UINT32_C(0xffff)) - Address.off;
}
else
{
if (Address.off > SelInfo.cbLimit)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cb = SelInfo.cbLimit - Address.off;
}
if (cbRead - 1 > cb)
{
if (!pcbRead)
return VERR_OUT_OF_SELECTOR_BOUNDS;
cbRead = cb + 1;
}
}
}
Var.enmType = DBGCVAR_TYPE_GC_FLAT;
Var.u.GCFlat = Address.FlatPtr;
break;
case DBGCVAR_TYPE_GC_FLAT:
case DBGCVAR_TYPE_GC_PHYS:
case DBGCVAR_TYPE_HC_FLAT:
case DBGCVAR_TYPE_HC_PHYS:
break;
default:
return VERR_NOT_IMPLEMENTED;
}
/*
* Copy page by page.
*/
size_t cbLeft = cbRead;
for (;;)
{
/*
* Calc read size.
*/
size_t cb = RT_MIN(PAGE_SIZE, cbLeft);
switch (pVarPointer->enmType)
{
case DBGCVAR_TYPE_GC_FLAT: cb = RT_MIN(cb, PAGE_SIZE - (Var.u.GCFlat & PAGE_OFFSET_MASK)); break;
case DBGCVAR_TYPE_GC_PHYS: cb = RT_MIN(cb, PAGE_SIZE - (Var.u.GCPhys & PAGE_OFFSET_MASK)); break;
case DBGCVAR_TYPE_HC_FLAT: cb = RT_MIN(cb, PAGE_SIZE - ((uintptr_t)Var.u.pvHCFlat & PAGE_OFFSET_MASK)); break;
case DBGCVAR_TYPE_HC_PHYS: cb = RT_MIN(cb, PAGE_SIZE - ((size_t)Var.u.HCPhys & PAGE_OFFSET_MASK)); break; /* size_t: MSC has braindead loss of data warnings! */
default: break;
}
/*
* Perform read.
*/
switch (Var.enmType)
{
case DBGCVAR_TYPE_GC_FLAT:
rc = DBGFR3MemRead(pDbgc->pUVM, pDbgc->idCpu,
DBGFR3AddrFromFlat(pDbgc->pUVM, &Address, Var.u.GCFlat),
pvBuffer, cb);
break;
case DBGCVAR_TYPE_GC_PHYS:
rc = DBGFR3MemRead(pDbgc->pUVM, pDbgc->idCpu,
DBGFR3AddrFromPhys(pDbgc->pUVM, &Address, Var.u.GCPhys),
pvBuffer, cb);
break;
case DBGCVAR_TYPE_HC_PHYS:
case DBGCVAR_TYPE_HC_FLAT:
{
DBGCVAR Var2;
rc = dbgcOpAddrFlat(pDbgc, &Var, DBGCVAR_CAT_ANY, &Var2);
if (RT_SUCCESS(rc))
{
/** @todo protect this!!! */
memcpy(pvBuffer, Var2.u.pvHCFlat, cb);
rc = 0;
}
else
rc = VERR_INVALID_POINTER;
break;
}
default:
rc = VERR_DBGC_PARSE_INCORRECT_ARG_TYPE;
}
/*
* Check for failure.
*/
if (RT_FAILURE(rc))
{
if (pcbRead && (*pcbRead = cbRead - cbLeft) > 0)
return VINF_SUCCESS;
return rc;
}
/*
* Next.
*/
cbLeft -= cb;
if (!cbLeft)
break;
pvBuffer = (char *)pvBuffer + cb;
rc = DBGCCmdHlpEval(pCmdHlp, &Var, "%DV + %d", &Var, cb);
if (RT_FAILURE(rc))
{
if (pcbRead && (*pcbRead = cbRead - cbLeft) > 0)
return VINF_SUCCESS;
return rc;
}
}
/*
* Done
*/
if (pcbRead)
*pcbRead = cbRead;
return 0;
}
