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windows-nt/Source/XPSP1/NT/base/boot/bd/ia64/debug.c

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/*++
Copyright (c) 1996 Microsoft Corporation
Module Name:
bdtrap.c
Abstract:
This module contains code to implement the target side of the boot debugger.
Author:
David N. Cutler (davec) 30-Nov-96
Revision History:
--*/
#include "bd.h"
#define ALIGN_NATS(Result, Source, Start, AddressOffset, Mask) \
if (AddressOffset == Start) { \
Result = (ULONGLONG)Source; \
} else if (AddressOffset < Start) { \
Result = (ULONGLONG)(Source << (Start - AddressOffset)); \
} else { \
Result = (ULONGLONG)((Source >> (AddressOffset - Start)) | \
(Source << (64 + Start - AddressOffset))); \
} \
Result = Result & (ULONGLONG)Mask
#define EXTRACT_NATS(Result, Source, Start, AddressOffset, Mask) \
Result = (ULONGLONG)(Source & (ULONGLONG)Mask); \
if (AddressOffset < Start) { \
Result = Result >> (Start - AddressOffset); \
} else if (AddressOffset > Start) { \
Result = ((Result << (AddressOffset - Start)) | \
(Result >> (64 + Start - AddressOffset))); \
}
//
// Define forward referenced function prototypes.
//
VOID
BdRestoreKframe(
IN OUT PKTRAP_FRAME TrapFrame,
IN OUT PKEXCEPTION_FRAME ExceptionFrame,
IN PCONTEXT ContextRecord
);
VOID
BdSaveKframe(
IN OUT PKTRAP_FRAME TrapFrame,
IN OUT PKEXCEPTION_FRAME ExceptionFrame,
OUT PCONTEXT ContextRecord
);
LOGICAL
BdEnterDebugger(
IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame
)
{
return FALSE;
}
VOID
BdExitDebugger(
IN LOGICAL Enable
)
{
}
VOID
BdGetDebugContext (
IN PKTRAP_FRAME TrapFrame,
IN OUT PCONTEXT ContextFrame
)
/*++
Routine Description:
This routine moves the user mode h/w debug registers from the debug register
save area in the kernel stack to the context record.
Arguments:
TrapFrame - Supplies a pointer to a trap frame from which volatile context
should be copied into the context record.
ContextFrame - Supplies a pointer to the context frame that receives the
context.
Return Value:
None.
Note:
PSR.db must be set to activate the debug registers.
This is used for getting user mode debug registers.
--*/
{
PKDEBUG_REGISTERS DebugRegistersSaveArea;
if (TrapFrame->PreviousMode == UserMode) {
DebugRegistersSaveArea = GET_DEBUG_REGISTER_SAVEAREA();
BdCopyMemory((PVOID)&ContextFrame->DbI0,
(PVOID)DebugRegistersSaveArea,
sizeof(KDEBUG_REGISTERS));
}
}
VOID
BdSetDebugContext (
IN OUT PKTRAP_FRAME TrapFrame,
IN PCONTEXT ContextFrame,
IN KPROCESSOR_MODE PreviousMode
)
/*++
Routine Description:
This routine moves the debug context from the specified context frame into
the debug registers save area in the kernel stack.
Arguments:
TrapFrame - Supplies a pointer to a trap frame.
ContextFrame - Supplies a pointer to a context frame that contains the
context that is to be copied.
PreviousMode - Supplies the processor mode for the target context.
Return Value:
None.
Notes:
PSR.db must be set to activate the debug registers.
This is used for setting up debug registers for user mode.
--*/
{
PKDEBUG_REGISTERS DebugRegistersSaveArea; // User mode h/w debug registers
if (PreviousMode == UserMode) {
DebugRegistersSaveArea = GET_DEBUG_REGISTER_SAVEAREA();
//
// Sanitize the debug control regs. Leave the addresses unchanged.
//
DebugRegistersSaveArea->DbI0 = ContextFrame->DbI0;
DebugRegistersSaveArea->DbI1 = SANITIZE_DR(ContextFrame->DbI1,UserMode);
DebugRegistersSaveArea->DbI2 = ContextFrame->DbI2;
DebugRegistersSaveArea->DbI3 = SANITIZE_DR(ContextFrame->DbI3,UserMode);
DebugRegistersSaveArea->DbI4 = ContextFrame->DbI4;
DebugRegistersSaveArea->DbI5 = SANITIZE_DR(ContextFrame->DbI5,UserMode);
DebugRegistersSaveArea->DbI6 = ContextFrame->DbI6;
DebugRegistersSaveArea->DbI7 = SANITIZE_DR(ContextFrame->DbI7,UserMode);
DebugRegistersSaveArea->DbD0 = ContextFrame->DbD0;
DebugRegistersSaveArea->DbD1 = SANITIZE_DR(ContextFrame->DbD1,UserMode);
DebugRegistersSaveArea->DbD2 = ContextFrame->DbD2;
DebugRegistersSaveArea->DbD3 = SANITIZE_DR(ContextFrame->DbD3,UserMode);
DebugRegistersSaveArea->DbD4 = ContextFrame->DbD4;
DebugRegistersSaveArea->DbD5 = SANITIZE_DR(ContextFrame->DbD5,UserMode);
DebugRegistersSaveArea->DbD6 = ContextFrame->DbD6;
DebugRegistersSaveArea->DbD7 = SANITIZE_DR(ContextFrame->DbD7,UserMode);
}
}
LOGICAL
BdTrap (
IN PEXCEPTION_RECORD ExceptionRecord,
IN PKEXCEPTION_FRAME ExceptionFrame,
IN PKTRAP_FRAME TrapFrame
)
/*++
Routine Description:
This routine is called whenever a exception is dispatched and the boot
debugger is active.
Arguments:
ExceptionRecord - Supplies a pointer to an exception record that
describes the exception.
ExceptionFrame - Supplies a pointer to an exception frame (NULL).
TrapFrame - Supplies a pointer to a trap frame that describes the
trap.
Return Value:
A value of TRUE is returned if the exception is handled. Otherwise a
value of FALSE is returned.
--*/
{
LOGICAL Completion;
PCONTEXT ContextRecord;
ULONG OldEip;
STRING Reply;
STRING String;
PKD_SYMBOLS_INFO SymbolInfo;
LOGICAL UnloadSymbols;
LOGICAL Enable;
ULONGLONG OldStIIP, OldStIPSR;
STRING Input;
STRING Output;
//
// Set address of context record and set context flags.
//
ContextRecord = &BdPrcb.ProcessorState.ContextFrame;
ContextRecord->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG;
BdSaveKframe(TrapFrame, ExceptionFrame, ContextRecord);
//
// Print, prompt, load symbols, and unload symbols are all special cases
// of STATUS_BREAKPOINT.
//
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) &&
(ExceptionRecord->ExceptionInformation[0] != KERNEL_BREAKPOINT)) {
//
// Switch on the breakpoint code.
//
switch (ExceptionRecord->ExceptionInformation[0]) {
//
// Print a debug string.
//
// Arguments: IA64 passes arguments via RSE not GR's. Since arguments are not
// part of CONTEXT struct, they need to be copies Temp registers.
// (see NTOS/RTL/IA64/DEBUGSTB.S)
//
// T0 - Supplies a pointer to an output string buffer.
// T1 - Supplies the length of the output string buffer.
//
case BREAKPOINT_PRINT:
//
// Advance to next instruction slot so that the BREAK instruction
// does not get re-executed
//
RtlIa64IncrementIP((ULONG_PTR)ExceptionRecord->ExceptionAddress >> 2,
ContextRecord->StIPSR,
ContextRecord->StIIP);
Output.Buffer = (PCHAR)ContextRecord->IntT0;
Output.Length = (USHORT)ContextRecord->IntT1;
// KdLogDbgPrint(&Output);
if (BdDebuggerNotPresent == FALSE) {
Enable = BdEnterDebugger(TrapFrame, ExceptionFrame);
if (BdPrintString(&Output)) {
ContextRecord->IntV0 = (ULONG)STATUS_BREAKPOINT;
} else {
ContextRecord->IntV0 = (ULONG)STATUS_SUCCESS;
}
BdExitDebugger(Enable);
} else {
ContextRecord->IntV0 = (ULONG)STATUS_DEVICE_NOT_CONNECTED;
}
BdRestoreKframe(TrapFrame, ExceptionFrame, ContextRecord);
return TRUE;
//
// Print a debug prompt string, then input a string.
//
// T0 - Supplies a pointer to an output string buffer.
// T1 - Supplies the length of the output string buffer..
// T2 - supplies a pointer to an input string buffer.
// T3 - Supplies the length of the input string bufffer.
//
case BREAKPOINT_PROMPT:
//
// Advance to next instruction slot so that the BREAK instruction
// does not get re-executed
//
RtlIa64IncrementIP((ULONG_PTR)ExceptionRecord->ExceptionAddress >> 2,
ContextRecord->StIPSR,
ContextRecord->StIIP);
Output.Buffer = (PCHAR)ContextRecord->IntT0;
Output.Length = (USHORT)ContextRecord->IntT1;
Input.Buffer = (PCHAR)ContextRecord->IntT2;
Input.MaximumLength = (USHORT)ContextRecord->IntT3;
// BdPrintString(&Output);
Enable = BdEnterDebugger(TrapFrame, ExceptionFrame);
BdPromptString(&Output, &Input);
ContextRecord->IntV0 = Input.Length;
BdExitDebugger(Enable);
BdRestoreKframe(TrapFrame, ExceptionFrame, ContextRecord);
return TRUE;
//
// Load the symbolic information for an image.
//
// Arguments:
//
// T0 - Supplies a pointer to an output string descriptor.
// T1 - Supplies a the base address of the image.
//
case BREAKPOINT_UNLOAD_SYMBOLS:
UnloadSymbols = TRUE;
//
// Fall through
//
case BREAKPOINT_LOAD_SYMBOLS:
//
// Advance to next instruction slot so that the BREAK instruction
// does not get re-executed
//
Enable = BdEnterDebugger(TrapFrame, ExceptionFrame);
OldStIPSR = ContextRecord->StIPSR;
OldStIIP = ContextRecord->StIIP;
if (BdDebuggerNotPresent == FALSE) {
BdReportLoadSymbolsStateChange((PSTRING)ContextRecord->IntT0,
(PKD_SYMBOLS_INFO) ContextRecord->IntT1,
UnloadSymbols,
ContextRecord);
}
BdExitDebugger(Enable);
//
// If the kernel debugger did not update the IP, then increment
// past the breakpoint instruction.
//
if ((ContextRecord->StIIP == OldStIIP) &&
((ContextRecord->StIPSR & IPSR_RI_MASK) == (OldStIPSR & IPSR_RI_MASK))) {
RtlIa64IncrementIP((ULONG_PTR)ExceptionRecord->ExceptionAddress >> 2,
ContextRecord->StIPSR,
ContextRecord->StIIP);
}
BdRestoreKframe(TrapFrame, ExceptionFrame, ContextRecord);
return TRUE;
//
// Kernel breakin break
//
case BREAKPOINT_BREAKIN:
//
// Advance to next instruction slot so that the BREAK instruction
// does not get re-executed
//
RtlIa64IncrementIP((ULONG_PTR)ExceptionRecord->ExceptionAddress >> 2,
ContextRecord->StIPSR,
ContextRecord->StIIP);
break;
//
// Unknown internal command.
//
default:
break;
}
}
//
// Get here if single step or BREAKIN breakpoint
//
if ((ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) ||
(ExceptionRecord->ExceptionCode == STATUS_SINGLE_STEP) ) {
//
// Report state change to kernel debugger on host
//
Enable = BdEnterDebugger(TrapFrame, ExceptionFrame);
Completion = BdReportExceptionStateChange(
ExceptionRecord,
&BdPrcb.ProcessorState.ContextFrame);
BdExitDebugger(Enable);
BdControlCPressed = FALSE;
} else {
//
// This is real exception that user doesn't want to see,
// so do NOT report it to debugger.
//
// return FALSE;
}
BdRestoreKframe(TrapFrame, ExceptionFrame, ContextRecord);
return TRUE;
}
LOGICAL
BdStub (
IN PEXCEPTION_RECORD ExceptionRecord,
IN PKEXCEPTION_FRAME ExceptionFrame,
IN PKTRAP_FRAME TrapFrame
)
/*++
Routine Description:
This routine provides a kernel debugger stub routine to catch debug
prints when the boot debugger is not active.
Arguments:
ExceptionRecord - Supplies a pointer to an exception record that
describes the exception.
ExceptionFrame - Supplies a pointer to an exception frame (NULL).
TrapFrame - Supplies a pointer to a trap frame that describes the
trap.
Return Value:
A value of TRUE is returned if the exception is handled. Otherwise a
value of FALSE is returned.
--*/
{
ULONG_PTR BreakpointCode;
//
// Isolate the breakpoint code from the breakpoint instruction which
// is stored by the exception dispatch code in the information field
// of the exception record.
//
BreakpointCode = (ULONG) ExceptionRecord->ExceptionInformation[0];
//
// If the breakpoint is a debug print, debug load symbols, or debug
// unload symbols, then return TRUE. Otherwise, return FALSE;
//
if ((BreakpointCode == BREAKPOINT_PRINT) ||
(BreakpointCode == BREAKPOINT_LOAD_SYMBOLS) ||
(BreakpointCode == BREAKPOINT_UNLOAD_SYMBOLS)) {
//
// Advance to next instruction slot so that the BREAK instruction
// does not get re-executed
//
RtlIa64IncrementIP((ULONG_PTR)ExceptionRecord->ExceptionAddress >> 2,
TrapFrame->StIPSR,
TrapFrame->StIIP);
return TRUE;
} else {
return FALSE;
}
}
VOID
BdRestoreKframe(
IN OUT PKTRAP_FRAME TrapFrame,
IN OUT PKEXCEPTION_FRAME ExceptionFrame,
IN PCONTEXT ContextFrame
)
/*++
Routine Description:
This routine moves the selected contents of the specified context frame into
the specified trap and exception frames according to the specified context
flags.
Arguments:
TrapFrame - Supplies a pointer to a trap frame that receives the volatile
context from the context record.
ExceptionFrame - Supplies a pointer to an exception frame that receives
the nonvolatile context from the context record.
ContextFrame - Supplies a pointer to a context frame that contains the
context that is to be copied into the trap and exception frames.
Return Value:
None.
--*/
{
USHORT R1Offset, R4Offset;
USHORT RNatSaveIndex;
SHORT BsFrameSize;
SHORT TempFrameSize;
ULONG ContextFlags=CONTEXT_FULL;
//
// Set control information if specified.
//
if ((ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL) {
TrapFrame->IntGp = ContextFrame->IntGp;
TrapFrame->IntSp = ContextFrame->IntSp;
TrapFrame->ApUNAT = ContextFrame->ApUNAT;
TrapFrame->BrRp = ContextFrame->BrRp;
TrapFrame->ApCCV = ContextFrame->ApCCV;
TrapFrame->ApDCR = ContextFrame->ApDCR;
//
// Set preserved applicaton registers in exception frame.
//
ExceptionFrame->ApLC = ContextFrame->ApLC;
ExceptionFrame->ApEC &= ~(PFS_EC_MASK << PFS_EC_MASK);
ExceptionFrame->ApEC |= ((ContextFrame->ApEC & PFS_EC_MASK) << PFS_EC_SHIFT);
//
// Set RSE control states in the trap frame.
//
TrapFrame->RsPFS = ContextFrame->RsPFS;
BsFrameSize = (SHORT)(ContextFrame->StIFS & PFS_SIZE_MASK);
RNatSaveIndex = (USHORT)((ContextFrame->RsBSP >> 3) & NAT_BITS_PER_RNAT_REG);
TempFrameSize = RNatSaveIndex + BsFrameSize - NAT_BITS_PER_RNAT_REG;
while (TempFrameSize >= 0) {
BsFrameSize++;
TempFrameSize -= NAT_BITS_PER_RNAT_REG;
}
TrapFrame->RsBSPSTORE = ContextFrame->RsBSPSTORE + BsFrameSize * 8;
TrapFrame->RsBSP = TrapFrame->RsBSPSTORE;
TrapFrame->RsRSC = ContextFrame->RsRSC;
TrapFrame->RsRNAT = ContextFrame->RsRNAT;
#if DEBUG
DbgPrint("KeContextToKFrames: RsRNAT = 0x%I64x\n", TrapFrame->RsRNAT);
#endif // DEBUG
//
// Set FPSR, IPSR, IIP, and IFS in the trap frame.
//
TrapFrame->StFPSR = ContextFrame->StFPSR;
TrapFrame->StIPSR = ContextFrame->StIPSR;
TrapFrame->StIFS = ContextFrame->StIFS;
TrapFrame->StIIP = ContextFrame->StIIP;
#if 0
//
// DebugActive controls h/w debug registers. Set if new psr.db = 1
//
KeGetCurrentThread()->DebugActive = ((TrapFrame->StIPSR & (1I64 << PSR_DB)) != 0);
//
// Set application registers directly
// *** TBD SANATIZE??
//
if (PreviousMode == UserMode ) {
__setReg(CV_IA64_AR21, ContextFrame->StFCR);
__setReg(CV_IA64_AR24, ContextFrame->Eflag);
__setReg(CV_IA64_AR25, ContextFrame->SegCSD);
__setReg(CV_IA64_AR26, ContextFrame->SegSSD);
__setReg(CV_IA64_AR27, ContextFrame->Cflag);
__setReg(CV_IA64_AR28, ContextFrame->StFSR);
__setReg(CV_IA64_AR29, ContextFrame->StFIR);
__setReg(CV_IA64_AR30, ContextFrame->StFDR);
}
#endif
}
//
// Set integer registers contents if specified.
//
if ((ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER) {
TrapFrame->IntT0 = ContextFrame->IntT0;
TrapFrame->IntT1 = ContextFrame->IntT1;
TrapFrame->IntT2 = ContextFrame->IntT2;
TrapFrame->IntT3 = ContextFrame->IntT3;
TrapFrame->IntT4 = ContextFrame->IntT4;
TrapFrame->IntV0 = ContextFrame->IntV0;
TrapFrame->IntTeb = ContextFrame->IntTeb;
TrapFrame->Preds = ContextFrame->Preds;
//
// t5 - t22
//
memcpy(&TrapFrame->IntT5, &ContextFrame->IntT5, 18*sizeof(ULONGLONG));
//
// Set integer registers s0 - s3 in exception frame.
//
ExceptionFrame->IntS0 = ContextFrame->IntS0;
ExceptionFrame->IntS1 = ContextFrame->IntS1;
ExceptionFrame->IntS2 = ContextFrame->IntS2;
ExceptionFrame->IntS3 = ContextFrame->IntS3;
//
// Set the integer nats field in the trap & exception frames
//
R1Offset = (USHORT)((ULONG_PTR)(&TrapFrame->IntGp) >> 3) & 0x3f;
R4Offset = (USHORT)((ULONG_PTR)(&ExceptionFrame->IntS0) >> 3) & 0x3f;
EXTRACT_NATS(TrapFrame->IntNats, ContextFrame->IntNats,
1, R1Offset, 0xFFFFFF0E);
EXTRACT_NATS(ExceptionFrame->IntNats, ContextFrame->IntNats,
4, R4Offset, 0xF0);
#if DEBUG
DbgPrint("KeContextToKFrames: TF->IntNats = 0x%I64x, ContestFrame->IntNats = 0x%I64x, R1OffSet = 0x%x\n",
TrapFrame->IntNats, ContextFrame->IntNats, R1Offset);
DbgPrint("KeContextToKFrames: EF->IntNats = 0x%I64x, R4OffSet = 0x%x\n",
ExceptionFrame->IntNats, R4Offset);
#endif // DEBUG
//
// Set other branch registers in trap and exception frames
//
TrapFrame->BrT0 = ContextFrame->BrT0;
TrapFrame->BrT1 = ContextFrame->BrT1;
memcpy(&ExceptionFrame->BrS0, &ContextFrame->BrS0, 5*sizeof(ULONGLONG));
}
//
// Set lower floating register contents if specified.
//
if ((ContextFlags & CONTEXT_LOWER_FLOATING_POINT) == CONTEXT_LOWER_FLOATING_POINT) {
TrapFrame->StFPSR = ContextFrame->StFPSR;
//
// Set floating registers fs0 - fs19 in exception frame.
//
RtlCopyIa64FloatRegisterContext(&ExceptionFrame->FltS0,
&ContextFrame->FltS0,
sizeof(FLOAT128) * (4));
RtlCopyIa64FloatRegisterContext(&ExceptionFrame->FltS4,
&ContextFrame->FltS4,
16*sizeof(FLOAT128));
//
// Set floating registers ft0 - ft9 in trap frame.
//
RtlCopyIa64FloatRegisterContext(&TrapFrame->FltT0,
&ContextFrame->FltT0,
sizeof(FLOAT128) * (10));
}
//
// Set higher floating register contents if specified.
//
if ((ContextFlags & CONTEXT_HIGHER_FLOATING_POINT) == CONTEXT_HIGHER_FLOATING_POINT) {
TrapFrame->StFPSR = ContextFrame->StFPSR;
#if 0
if (PreviousMode == UserMode) {
//
// Update the higher floating point save area (f32-f127) and
// set the corresponding modified bit in the PSR to 1.
//
RtlCopyIa64FloatRegisterContext(
(PFLOAT128)GET_HIGH_FLOATING_POINT_REGISTER_SAVEAREA(),
&ContextFrame->FltF32,
96*sizeof(FLOAT128)
);
//
// set the dfh bit to force a reload of the high fp register
// set on the next user access
//
TrapFrame->StIPSR |= (1i64 << PSR_DFH);
}
#endif
}
#if 0
//
// Set debug registers.
//
if ((ContextFlags & CONTEXT_DEBUG) == CONTEXT_DEBUG) {
BdSetDebugContext (TrapFrame, ContextFrame, 0);
}
#endif
return;
}
VOID
BdSaveKframe(
IN OUT PKTRAP_FRAME TrapFrame,
IN OUT PKEXCEPTION_FRAME ExceptionFrame,
IN PCONTEXT ContextFrame
)
/*++
Routine Description:
This routine moves the selected contents of the specified trap and exception
frames into the specified context frame according to the specified context
flags.
Arguments:
TrapFrame - Supplies a pointer to a trap frame from which volatile context
should be copied into the context record.
ExceptionFrame - Supplies a pointer to an exception frame from which context
should be copied into the context record.
ContextFrame - Supplies a pointer to the context frame that receives the
context copied from the trap and exception frames.
Return Value:
None.
--*/
{
ULONGLONG IntNats1, IntNats2;
USHORT R1Offset, R4Offset;
USHORT RNatSaveIndex;
SHORT BsFrameSize;
SHORT TempFrameSize;
ULONG ContextFlags=CONTEXT_FULL;
//
// Set control information if specified.
//
if ((ContextFrame->ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL) {
ContextFrame->IntGp = TrapFrame->IntGp;
ContextFrame->IntSp = TrapFrame->IntSp;
ContextFrame->ApUNAT = TrapFrame->ApUNAT;
ContextFrame->BrRp = TrapFrame->BrRp;
ContextFrame->ApCCV = TrapFrame->ApCCV;
ContextFrame->ApDCR = TrapFrame->ApDCR;
ContextFrame->StFPSR = TrapFrame->StFPSR;
ContextFrame->StIPSR = TrapFrame->StIPSR;
ContextFrame->StIIP = TrapFrame->StIIP;
ContextFrame->StIFS = TrapFrame->StIFS;
//
// Set RSE control states from the trap frame.
//
ContextFrame->RsPFS = TrapFrame->RsPFS;
BsFrameSize = (SHORT)(TrapFrame->StIFS & PFS_SIZE_MASK);
RNatSaveIndex = (USHORT) (TrapFrame->RsBSP >> 3) & NAT_BITS_PER_RNAT_REG;
TempFrameSize = BsFrameSize - RNatSaveIndex;
while (TempFrameSize > 0) {
BsFrameSize++;
TempFrameSize -= NAT_BITS_PER_RNAT_REG;
}
ContextFrame->RsBSP = TrapFrame->RsBSP - BsFrameSize * 8;
ContextFrame->RsBSPSTORE = ContextFrame->RsBSP;
ContextFrame->RsRSC = TrapFrame->RsRSC;
ContextFrame->RsRNAT = TrapFrame->RsRNAT;
#if DEBUG
DbgPrint("KeContextFromKFrames: RsRNAT = 0x%I64x\n",
ContextFrame->RsRNAT);
#endif // DEBUG
//
// Set preserved applicaton registers from exception frame.
//
ContextFrame->ApLC = ExceptionFrame->ApLC;
ContextFrame->ApEC = (ExceptionFrame->ApEC >> PFS_EC_SHIFT) & PFS_EC_MASK;
//
// Get iA status from the application registers
//
ContextFrame->StFCR = __getReg(CV_IA64_AR21);
ContextFrame->Eflag = __getReg(CV_IA64_AR24);
ContextFrame->SegCSD = __getReg(CV_IA64_AR25);
ContextFrame->SegSSD = __getReg(CV_IA64_AR26);
ContextFrame->Cflag = __getReg(CV_IA64_AR27);
ContextFrame->StFSR = __getReg(CV_IA64_AR28);
ContextFrame->StFIR = __getReg(CV_IA64_AR29);
ContextFrame->StFDR = __getReg(CV_IA64_AR30);
}
//
// Set integer register contents if specified.
//
if ((ContextFrame->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER) {
ContextFrame->IntT0 = TrapFrame->IntT0;
ContextFrame->IntT1 = TrapFrame->IntT1;
ContextFrame->IntT2 = TrapFrame->IntT2;
ContextFrame->IntT3 = TrapFrame->IntT3;
ContextFrame->IntT4 = TrapFrame->IntT4;
ContextFrame->IntV0 = TrapFrame->IntV0;
ContextFrame->IntTeb = TrapFrame->IntTeb;
ContextFrame->Preds = TrapFrame->Preds;
//
// t5 - t22
//
memcpy(&ContextFrame->IntT5, &TrapFrame->IntT5, 18*sizeof(ULONGLONG));
//
// Set branch registers from trap frame & exception frame
//
ContextFrame->BrT0 = TrapFrame->BrT0;
ContextFrame->BrT1 = TrapFrame->BrT1;
memcpy(&ContextFrame->BrS0, &ExceptionFrame->BrS0, 5*sizeof(ULONGLONG));
//
// Set integer registers s0 - s3 from exception frame.
//
ContextFrame->IntS0 = ExceptionFrame->IntS0;
ContextFrame->IntS1 = ExceptionFrame->IntS1;
ContextFrame->IntS2 = ExceptionFrame->IntS2;
ContextFrame->IntS3 = ExceptionFrame->IntS3;
//
// Set the integer nats field in the context
//
R1Offset = (USHORT)((ULONG_PTR)(&TrapFrame->IntGp) >> 3) & 0x3f;
R4Offset = (USHORT)((ULONG_PTR)(&ExceptionFrame->IntS0) >> 3) & 0x3f;
ALIGN_NATS(IntNats1, TrapFrame->IntNats, 1, R1Offset, 0xFFFFFF0E);
ALIGN_NATS(IntNats2, ExceptionFrame->IntNats, 4, R4Offset, 0xF0);
ContextFrame->IntNats = IntNats1 | IntNats2;
#if DEBUG
DbgPrint("KeContextFromKFrames: TF->IntNats = 0x%I64x, R1OffSet = 0x%x, R4Offset = 0x%x\n",
TrapFrame->IntNats, R1Offset, R4Offset);
DbgPrint("KeContextFromKFrames: CF->IntNats = 0x%I64x, IntNats1 = 0x%I64x, IntNats2 = 0x%I64x\n",
ContextFrame->IntNats, IntNats1, IntNats2);
#endif // DEBUG
}
//
// Set lower floating register contents if specified.
//
if ((ContextFrame->ContextFlags & CONTEXT_LOWER_FLOATING_POINT) == CONTEXT_LOWER_FLOATING_POINT) {
//
// Set EM + ia32 FP status
//
ContextFrame->StFPSR = TrapFrame->StFPSR;
//
// Set floating registers fs0 - fs19 from exception frame.
//
RtlCopyIa64FloatRegisterContext(&ContextFrame->FltS0,
&ExceptionFrame->FltS0,
sizeof(FLOAT128) * (4));
RtlCopyIa64FloatRegisterContext(&ContextFrame->FltS4,
&ExceptionFrame->FltS4,
16*sizeof(FLOAT128));
//
// Set floating registers ft0 - ft9 from trap frame.
//
RtlCopyIa64FloatRegisterContext(&ContextFrame->FltT0,
&TrapFrame->FltT0,
sizeof(FLOAT128) * (10));
}
#if 0
if ((ContextFrame->ContextFlags & CONTEXT_HIGHER_FLOATING_POINT) == CONTEXT_HIGHER_FLOATING_POINT) {
ContextFrame->StFPSR = TrapFrame->StFPSR;
//
// Set floating regs f32 - f127 from higher floating point save area
//
if (TrapFrame->PreviousMode == UserMode) {
RtlCopyIa64FloatRegisterContext(
&ContextFrame->FltF32,
(PFLOAT128)GET_HIGH_FLOATING_POINT_REGISTER_SAVEAREA(),
96*sizeof(FLOAT128)
);
}
}
//
// Get user debug registers from save area in kernel stack.
// Note: PSR.db must be set to activate the debug registers.
//
if ((ContextFrame->ContextFlags & CONTEXT_DEBUG) == CONTEXT_DEBUG) {
BdGetDebugContext(TrapFrame, ContextFrame);
}
#endif
return;
}
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