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windows-nt-4.0/private/windbg/em/p_mips/emdpdev.c

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/**** EMDPDEV.C - Debugger end Execution Model (MIPS dependent code) **
* *
* *
* Copyright <C> 1990, Microsoft Corp *
* *
* Created: October 15, 1990 by David W. Gray *
* *
* Revision History: *
* *
* Purpose: *
* *
* *
***************************************************************************/
#include "precomp.h"
#pragma hdrstop
#include "strings.h"
CONTEXT ContextSave;
#ifndef SMARTALIAS
void PurgeCache ( void );
#endif
#define CEXM_MDL_native 0x20
/*
** This is the description of all registers and flags containned on the
** mips machine
*/
extern RD Rgrd[];
extern struct {
FD fd;
USHORT iShift;
} Rgfd[];
#define SIZEOF_STACK_OFFSET sizeof(LONG)
BOOL NEAR PASCAL IsStackSetup(
HPID hpid,
HTID htid,
LPADDR lpaddrProc
) {
Unreferenced(hpid);
Unreferenced(htid);
Unreferenced(lpaddrProc);
return TRUE;
}
XOSD
GetAddr (
HPID hpid,
HTID htid,
ADR adr,
LPADDR lpaddr
)
/*++
Routine Description:
This function will get return a specific type of address.
Arguments:
hpid - Supplies the handle to the process to retrive the address from
htid - Supplies the handle to the thread to retrieve the address from
adr - Supplies the type of address to be retrieved
lpaddr - Returns the requested address
Return Value:
XOSD error code
--*/
{
HPRC hprc;
HTHD hthd;
LPTHD lpthd = NULL;
XOSD xosd = xosdNone;
HEMI hemi = emiAddr(*lpaddr);
HMDI hmdi;
LPMDI lpmdi;
assert ( lpaddr != NULL );
assert ( hpid != NULL );
hprc = ValidHprcFromHpid(hpid);
if (!hprc) {
#ifdef OSDEBUG4
return xosdBadProcess;
#else
return xosdInvalidProc;
#endif
}
hthd = HthdFromHtid(hprc, htid);
if ( hthd != NULL ) {
lpthd = LLLock ( hthd );
}
_fmemset ( lpaddr, 0, sizeof ( ADDR ) );
switch ( adr ) {
case adrPC:
if ( lpthd && !(lpthd->drt & drtCntrlPresent) ) {
UpdateRegisters ( hprc, hthd );
}
break;
case adrData:
if ( lpthd && !(lpthd->drt & drtAllPresent )) {
UpdateRegisters ( hprc, hthd );
}
break;
}
switch ( adr ) {
#ifndef OSDEBUG4
case adrCurrent:
// If a non-NULL HTHD was passed in, use addrCurrent from that
// thread. Otherwise use addrCurrent from the HPRC.
if ( lpthd ) {
*lpaddr = lpthd->addrCurrent;
} else {
LPPRC lpprc = LLLock ( hprc );
*lpaddr = lpprc->addrCurrent;
LLUnlock ( hprc );
}
break;
#endif
case adrPC:
AddrInit(lpaddr, 0, 0,
(UOFFSET) lpthd->regs.XFir, lpthd->fFlat,
lpthd->fOff32, FALSE, lpthd->fReal)
SetEmi ( hpid, lpaddr );
break;
case adrData:
AddrInit(lpaddr, 0, 0, 0,
lpthd->fFlat, lpthd->fOff32, FALSE, lpthd->fReal);
SetEmi ( hpid, lpaddr );
break;
case adrTlsBase:
/*
* If -1 then we have not gotten a value from the DM yet.
*/
assert(hemi != 0);
if (hemi == 0) {
return xosdBadAddress;
}
if (hemi != emiAddr(lpthd->addrTls)) {
hmdi = LLFind( LlmdiFromHprc( hprc ), 0, (LPBYTE) &hemi, emdiEMI);
assert(hmdi != 0);
if (hmdi == 0) {
return xosdBadAddress;
}
lpmdi = LLLock( hmdi );
SendRequestX( dmfQueryTlsBase, hpid, htid, sizeof(OFFSET),
&lpmdi->lpBaseOfDll);
lpthd->addrTls = *((LPADDR) LpDmMsg->rgb);
emiAddr(lpthd->addrTls) = hemi;
LLUnlock( hmdi );
}
*lpaddr = lpthd->addrTls;
emiAddr(*lpaddr) = 0;
break;
default:
assert ( FALSE );
break;
}
if ( hthd != NULL ) {
LLUnlock ( hthd );
}
return xosd;
} /* GetAddr() */
XOSD
SetAddr (
HPID hpid,
HTID htid,
ADR adr,
LPADDR lpaddr
)
{
HPRC hprc;
HTHD hthd;
LPTHD lpthd = NULL;
assert ( lpaddr != NULL );
assert ( hpid != NULL );
hprc = ValidHprcFromHpid(hpid);
if (!hprc) {
#ifdef OSDEBUG4
return xosdBadProcess;
#else
return xosdInvalidProc;
#endif
}
hthd = HthdFromHtid(hprc, htid);
if ( hthd != NULL ) {
lpthd = LLLock ( hthd );
}
switch ( adr ) {
case adrPC:
if ( !( lpthd->drt & drtCntrlPresent) ) {
UpdateRegisters ( hprc, hthd );
}
break;
case adrData:
if ( !(lpthd->drt & drtAllPresent) ) {
UpdateRegisters ( hprc, hthd );
}
break;
}
switch ( adr ) {
#ifndef OSDEBUG4
case adrCurrent:
if ( lpaddr->emi == NULL ) {
SetEmi ( hpid, lpaddr );
}
// If a non-NULL HTHD was passed in, use addrCurrent from that
// thread. Otherwise use addrCurrent from the HPRC.
if ( lpthd ) {
lpthd->addrCurrent = *lpaddr;
}
else {
LPPRC lpprc = LLLock ( hprc );
lpprc->addrCurrent = *lpaddr;
LLUnlock ( hprc );
}
break;
#endif
case adrPC:
lpthd->regs.XFir = GetAddrOff ( *lpaddr );
lpthd->drt |= drtCntrlDirty;
break;
case adrData:
case adrTlsBase:
default:
assert ( FALSE );
break;
}
if ( hthd != NULL ) {
LLUnlock ( hthd );
}
return xosdNone;
} /* SetAddr() */
XOSD
SetAddrFromCSIP (
HTHD hthd
)
{
ADDR addr = {0};
LPTHD lpthd;
assert ( hthd != NULL && hthd != hthdInvalid );
lpthd = LLLock ( hthd );
GetAddrSeg ( addr ) = 0;
GetAddrOff ( addr ) = (UOFFSET) lpthd->regs.XFir;
emiAddr ( addr ) = 0;
ADDR_IS_FLAT ( addr ) = TRUE;
#ifndef OSDEBUG4
lpthd->addrCurrent = addr;
#endif
LLUnlock ( hthd );
return xosdNone;
}
LPVOID
DoGetReg(
LPCONTEXT lpregs,
DWORD ireg,
LPVOID lpvRegValue
)
/*++
Routine Description:
This routine is used to extract the value of a single register from
the debuggee.
Arguments:
lpregs - Supplies pointer to the register set for the debuggee
ireg - Supplies the index of the register to be read
lpvRegValue - Supplies the buffer to place the register value in
Return Value:
return-value - lpvRegValue + size of register on sucess and NULL on
failure
--*/
{
switch ( ireg ) {
case CV_M4_IntZERO:
case CV_M4_IntAT:
case CV_M4_IntV0:
case CV_M4_IntV1:
case CV_M4_IntA0:
case CV_M4_IntA1:
case CV_M4_IntA2:
case CV_M4_IntA3:
case CV_M4_IntT0:
case CV_M4_IntT1:
case CV_M4_IntT2:
case CV_M4_IntT3:
case CV_M4_IntT4:
case CV_M4_IntT5:
case CV_M4_IntT6:
case CV_M4_IntT7:
case CV_M4_IntS0:
case CV_M4_IntS1:
case CV_M4_IntS2:
case CV_M4_IntS3:
case CV_M4_IntS4:
case CV_M4_IntS5:
case CV_M4_IntS6:
case CV_M4_IntS7:
case CV_M4_IntT8:
case CV_M4_IntT9:
case CV_M4_IntKT0:
case CV_M4_IntKT1:
case CV_M4_IntGP:
case CV_M4_IntSP:
case CV_M4_IntS8:
case CV_M4_IntRA:
case CV_M4_IntLO:
case CV_M4_IntHI:
//assert( ((DWORD)lpvRegValue & 0x7) == 0 );
*((PDWORDLONG) lpvRegValue) = ((PDWORDLONG)(&lpregs->XIntZero))[ireg - CV_M4_IntZERO];
(LPLONG) lpvRegValue += 2;
break;
case CV_M4_Fir:
*((LPLONG) lpvRegValue) = lpregs->XFir;
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_Psr:
*((LPLONG) lpvRegValue) = lpregs->XPsr;
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_FltF0:
case CV_M4_FltF1:
case CV_M4_FltF2:
case CV_M4_FltF3:
case CV_M4_FltF4:
case CV_M4_FltF5:
case CV_M4_FltF6:
case CV_M4_FltF7:
case CV_M4_FltF8:
case CV_M4_FltF9:
case CV_M4_FltF10:
case CV_M4_FltF11:
case CV_M4_FltF12:
case CV_M4_FltF13:
case CV_M4_FltF14:
case CV_M4_FltF15:
case CV_M4_FltF16:
case CV_M4_FltF17:
case CV_M4_FltF18:
case CV_M4_FltF19:
case CV_M4_FltF20:
case CV_M4_FltF21:
case CV_M4_FltF22:
case CV_M4_FltF23:
case CV_M4_FltF24:
case CV_M4_FltF25:
case CV_M4_FltF26:
case CV_M4_FltF27:
case CV_M4_FltF28:
case CV_M4_FltF29:
case CV_M4_FltF30:
case CV_M4_FltF31:
*((LPLONG) lpvRegValue) = ((LONG *)(&lpregs->FltF0))[ireg - CV_M4_FltF0];
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_FltFsr:
*((LPLONG) lpvRegValue) = lpregs->Fsr;
(LPLONG) lpvRegValue += 1;
break;
default:
assert(FALSE);
}
return lpvRegValue;
}
LPVOID
DoSetReg(
LPCONTEXT lpregs,
DWORD ireg,
LPVOID lpvRegValue
)
/*++
Routine Description:
This routine is used to set a specific register in a threads
context
Arguments:
lpregs - Supplies pointer to register context for thread
ireg - Supplies the index of the register to be modified
lpvRegValue - Supplies the buffer containning the new data
Return Value:
return-value - the pointer the the next location where a register
value could be.
--*/
{
switch ( ireg ) {
case CV_M4_IntZERO:
return NULL;
case CV_M4_IntAT:
case CV_M4_IntV0:
case CV_M4_IntV1:
case CV_M4_IntA0:
case CV_M4_IntA1:
case CV_M4_IntA2:
case CV_M4_IntA3:
case CV_M4_IntT0:
case CV_M4_IntT1:
case CV_M4_IntT2:
case CV_M4_IntT3:
case CV_M4_IntT4:
case CV_M4_IntT5:
case CV_M4_IntT6:
case CV_M4_IntT7:
case CV_M4_IntS0:
case CV_M4_IntS1:
case CV_M4_IntS2:
case CV_M4_IntS3:
case CV_M4_IntS4:
case CV_M4_IntS5:
case CV_M4_IntS6:
case CV_M4_IntS7:
case CV_M4_IntT8:
case CV_M4_IntT9:
case CV_M4_IntKT0:
case CV_M4_IntKT1:
case CV_M4_IntGP:
case CV_M4_IntSP:
case CV_M4_IntS8:
case CV_M4_IntRA:
case CV_M4_IntLO:
case CV_M4_IntHI:
//assert( ((DWORD)lpvRegValue & 0x7) == 0);
((PDWORDLONG)(&lpregs->XIntZero))[ireg - CV_M4_IntZERO] = *((PDWORDLONG) lpvRegValue);
(LPLONG) lpvRegValue += 2;
break;
case CV_M4_Fir:
lpregs->XFir = *((LPLONG) lpvRegValue);
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_Psr:
lpregs->XPsr = *((LPLONG) lpvRegValue);
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_FltF0:
case CV_M4_FltF1:
case CV_M4_FltF2:
case CV_M4_FltF3:
case CV_M4_FltF4:
case CV_M4_FltF5:
case CV_M4_FltF6:
case CV_M4_FltF7:
case CV_M4_FltF8:
case CV_M4_FltF9:
case CV_M4_FltF10:
case CV_M4_FltF11:
case CV_M4_FltF12:
case CV_M4_FltF13:
case CV_M4_FltF14:
case CV_M4_FltF15:
case CV_M4_FltF16:
case CV_M4_FltF17:
case CV_M4_FltF18:
case CV_M4_FltF19:
case CV_M4_FltF20:
case CV_M4_FltF21:
case CV_M4_FltF22:
case CV_M4_FltF23:
case CV_M4_FltF24:
case CV_M4_FltF25:
case CV_M4_FltF26:
case CV_M4_FltF27:
case CV_M4_FltF28:
case CV_M4_FltF29:
case CV_M4_FltF30:
case CV_M4_FltF31:
((LONG *)(&lpregs->FltF0))[ireg - CV_M4_FltF0] = *((LPLONG) lpvRegValue);
(LPLONG) lpvRegValue += 1;
break;
case CV_M4_FltFsr:
lpregs->XPsr = *((LPLONG) lpvRegValue);
*((LPLONG) lpvRegValue) = lpregs->Fsr;
(LPLONG) lpvRegValue += 1;
break;
default:
assert(FALSE);
return NULL;
}
return lpvRegValue;
}
LPVOID
DoSetFrameReg(
HPID hpid,
HTID htid,
LPTHD lpthd,
PKNONVOLATILE_CONTEXT_POINTERS contextPtrs,
DWORD ireg,
LPVOID lpvRegValue
)
{
return DoSetReg(&lpthd->regs, ireg, lpvRegValue);
}
XOSD
GetFlagValue (
HPID hpid,
HTID htid,
DWORD iFlag,
LPVOID lpvRegValue
)
{
HPRC hprc;
HTHD hthd;
LPTHD lpthd;
LPCONTEXT lpregs;
DWORD value;
hprc = ValidHprcFromHpid(hpid);
if (!hprc) {
#ifdef OSDEBUG4
return xosdBadProcess;
#else
return xosdInvalidProc;
#endif
}
hthd = HthdFromHtid(hprc, htid);
assert ( hthd != NULL );
lpthd = LLLock ( hthd );
lpregs = &lpthd->regs;
if ( !(lpthd->drt & drtAllPresent) ) {
UpdateRegisters ( hprc, hthd );
}
//
// MIPS Psr is 32 bits:
//
#ifdef OSDEBUG4
if (DoGetReg ( lpregs, Rgfd[iFlag].fd.dwId, &value ) == NULL) {
LLUnlock( hthd );
return xosdInvalidParameter;
}
value = (value >> Rgfd[iFlag].iShift) & ((1 << Rgfd[iFlag].fd.dwcbits) - 1);
if (Rgfd[iFlag].fd.dwcbits > 32) {
*( (LPLONG) lpvRegValue) = value;
#else
if (DoGetReg ( lpregs, Rgfd[iFlag].fd.hReg, &value ) == NULL) {
LLUnlock( hthd );
return xosdInvalidRegister;
}
value = (value >> Rgfd[iFlag].iShift) & ((1 << Rgfd[iFlag].fd.cbits) - 1);
*( (LPLONG) lpvRegValue) = value;
#endif
LLUnlock(hthd);
return xosdNone;
}
#ifndef OSDEBUG4
XOSD
StackWalkSetup(
HPID hpid,
HTID htid,
LPSTACKFRAME lpstkframe
)
/*++
Routine Description:
This routine is used to setup the StackWalk Structure.
This routine will defer the processing to the dm
Arguments:
hprc - Supplies handle to process to stack walk
hthd - Supplies handle to thread to stack walk
lpstkframe - Supplies pointer the stack walk structure
Return Value:
xosd error code
--*/
{
LPTHD lpthd;
HTHD hthd;
HPRC hprc = ValidHprcFromHpid(hpid);
if (!hprc) {
#ifdef OSDEBUG4
return xosdBadProcess;
#else
return xosdInvalidProc;
#endif
}
hthd = HthdFromHtid(hprc, htid);
if (hthd == NULL) {
#ifdef OSDEBUG4
return xosdBadThread;
#else
return xosdInvalidThread;
#endif
}
lpthd = LLLock( hthd );
assert(lpthd != NULL);
if (lpthd->drt & (drtCntrlDirty|drtAllDirty)) {
SendRequestX(dmfWriteReg, hpid, htid, sizeof(CONTEXT), &lpthd->regs);
lpthd->drt &= ~(drtCntrlDirty|drtAllDirty);
}
UpdateRegisters( hprc, hthd );
ContextSave = lpthd->regs;
if (StackWalk( IMAGE_FILE_MACHINE_R4000,
hpid,
htid,
lpstkframe,
&ContextSave,
SwReadMemory,
SwFunctionTableAccess,
NULL,
NULL
)) {
LLUnlock( hthd );
return xosdNone;
}
LLUnlock( hthd );
return xosdEndOfStack;
} /* StackWalkSetup() */
XOSD
StackWalkNext(
HPID hpid,
HTID htid,
LPSTACKFRAME lpstkframe
)
/*++
Routine Description:
This function is called to move up a level in the call stack.
We defer down to the DM to do this.
Arguments:
hpid - Supplies process handle to stack walk
htid - Supplies thread handle to stack walk
lpstkframe - Supplies pointer to stack walk data
Return Value:
XOSD error code
--*/
{
LPTHD lpthd;
HTHD hthd;
HPRC hprc = ValidHprcFromHpid(hpid);
if (!hprc) {
#ifdef OSDEBUG4
return xosdBadProcess;
#else
return xosdInvalidProc;
#endif
}
hthd = HthdFromHtid(hprc, htid);
if (hthd == NULL) {
#ifdef OSDEBUG4
return xosdBadThread;
#else
return xosdInvalidThread;
#endif
}
lpthd = LLLock( hthd );
assert(lpthd != NULL);
if (StackWalk( IMAGE_FILE_MACHINE_R4000,
hpid,
htid,
lpstkframe,
&ContextSave,
SwReadMemory,
SwFunctionTableAccess,
NULL,
NULL
)) {
LLUnlock( hthd );
return xosdNone;
}
LLUnlock( hthd );
return xosdEndOfStack;
} /* StackWalkNext() */
XOSD
SetFrame(
HPID hpid,
HTID htid,
PFRAME pframe
)
/*++
Routine Description:
This routine is used to fill in the FRAME structure.
Arguments:
hprc - Supplies handle to process to stack walk in
hthd - Supplies handle to thread to stack walk in
pframe - Supplies pointer to the frame structure to fill in
Return Value:
xosd error code
--*/
{
DWORDLONG ull;
GetRegValue( hpid, htid, CV_M4_IntSP, &ull);
FrameFlat ( *pframe ) = TRUE;
FrameOff32 ( *pframe ) = TRUE;
FrameReal (*pframe ) = FALSE;
SetFrameBPOff( *pframe, (DWORD)ull );
SetFrameBPSeg( *pframe, 0);
pframe->SS = 0;
pframe->DS = 0;
pframe->PID = hpid;
pframe->TID = htid;
return xosdNone;
} /* SetFrame() */
#endif // !OSDEBUG4
PIMAGE_RUNTIME_FUNCTION_ENTRY
LookupFunctionEntry (
PIMAGE_RUNTIME_FUNCTION_ENTRY FunctionTable,
DWORD NumberOfFunctions,
DWORD ControlPc
)
/*++
Routine Description:
This function searches the currently active function tables for an entry
that corresponds to the specified PC value.
Arguments:
ControlPc - Supplies the address of an instruction within the specified
function.
Return Value:
If there is no entry in the function table for the specified PC, then
NULL is returned. Otherwise, the address of the function table entry
that corresponds to the specified PC is returned.
--*/
{
PIMAGE_RUNTIME_FUNCTION_ENTRY FunctionEntry;
LONG High;
LONG Low;
LONG Middle;
//
// Initialize search indicies.
//
Low = 0;
High = NumberOfFunctions - 1;
//
// Perform binary search on the function table for a function table
// entry that subsumes the specified PC.
//
while (High >= Low) {
//
// Compute next probe index and test entry. If the specified PC
// is greater than of equal to the beginning address and less
// than the ending address of the function table entry, then
// return the address of the function table entry. Otherwise,
// continue the search.
//
Middle = (Low + High) >> 1;
FunctionEntry = &FunctionTable[Middle];
if (ControlPc < FunctionEntry->BeginAddress) {
High = Middle - 1;
} else if (ControlPc >= FunctionEntry->EndAddress) {
Low = Middle + 1;
} else {
return FunctionEntry;
}
}
//
// A function table entry for the specified PC was not found.
//
return NULL;
}
LPVOID
SwFunctionTableAccess(
HPID hpid,
DWORD AddrBase
)
{
HLLI hlli = 0;
HMDI hmdi = 0;
LPMDI lpmdi = 0;
PIMAGE_RUNTIME_FUNCTION_ENTRY rf;
hmdi = SwGetMdi( hpid, AddrBase );
if (!hmdi) {
return NULL;
}
lpmdi = LLLock( hmdi );
if (lpmdi) {
rf = LookupFunctionEntry( lpmdi->lpDebug->lpRtf,
lpmdi->lpDebug->cRtf,
AddrBase
);
LLUnlock( hmdi );
return (LPVOID)rf;
}
return NULL;
}
BOOL
SwReadMemory(
HPID hpid,
LPCVOID lpBaseAddress,
LPVOID lpBuffer,
DWORD nSize,
LPDWORD lpNumberOfBytesRead
)
{
ADDR addr;
DWORD cb;
XOSD xosd;
addr.addr.off = (OFFSET)lpBaseAddress;
addr.addr.seg = 0;
addr.emi = 0;
addr.mode.fFlat = TRUE;
addr.mode.fOff32 = FALSE;
addr.mode.fIsLI = FALSE;
addr.mode.fReal = FALSE;
xosd = ReadBuffer( hpid, NULL, &addr, nSize, lpBuffer, &cb );
if (xosd != xosdNone) {
return FALSE;
}
if (lpNumberOfBytesRead) {
*lpNumberOfBytesRead = cb;
}
return TRUE;
}
XOSD
SetPath(
HPID hpid,
HTID htid,
BOOL Set,
LSZ Path
)
/*++
Routine Description:
Sets the search path in the DM
Arguments:
hpid - process
htid - thread
Set - set flag
Path - Path to search, PATH if null
Return Value:
xosd error code
--*/
{
char Buffer[ MAX_PATH ];
SETPTH *SetPth = (SETPTH *)&Buffer;
if ( Set ) {
SetPth->Set = TRUE;
if ( Path ) {
strcpy(SetPth->Path, Path );
} else {
SetPth->Path[0] = '\0';
}
} else {
SetPth->Set = FALSE;
SetPth->Path[0] = '\0';
}
return SendRequestX( dmfSetPath, hpid, htid, sizeof(SETPTH) + strlen(SetPth->Path), SetPth );
}
XOSD
GetFunctionInfo(
HPID hpid,
PADDR Addr,
PFUNCTION_INFO FunctionInfo
)
/*++
Routine Description:
Gets function information for a particular address.
Arguments:
hpid - process
Addr - Address
FunctionInfo - Function information
Return Value:
xosd error code
--*/
{
XOSD xosd = xosdNone;
PIMAGE_RUNTIME_FUNCTION_ENTRY pfe;
pfe = SwFunctionTableAccess( hpid, GetAddrOff( *Addr ) );
if ( pfe ) {
AddrInit( &FunctionInfo->AddrStart, 0,0, pfe->BeginAddress,
TRUE, TRUE, FALSE, FALSE );
AddrInit( &FunctionInfo->AddrEnd, 0,0, pfe->EndAddress,
TRUE, TRUE, FALSE, FALSE );
AddrInit( &FunctionInfo->AddrPrologEnd, 0,0, pfe->PrologEndAddress,
TRUE, TRUE, FALSE, FALSE );
} else {
xosd = xosdUnknown;
}
return xosd;
}