/** @file
x64 Group registers read support functions.
Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "DebugAgent.h"
/**
Read segment selector by register index.
@param[in] CpuContext Pointer to saved CPU context.
@param[in] RegisterIndex Register Index.
@return Value of segment selector.
**/
UINT64
ReadRegisterSelectorByIndex (
IN DEBUG_CPU_CONTEXT *CpuContext,
IN UINT8 RegisterIndex
)
{
IA32_DESCRIPTOR *Ia32Descriptor;
IA32_GDT *Ia32Gdt;
UINT16 Selector;
UINT32 Data32;
Ia32Descriptor = (IA32_DESCRIPTOR *) CpuContext->Gdtr;
Ia32Gdt = (IA32_GDT *) (Ia32Descriptor->Base);
Selector = 0;
switch (RegisterIndex) {
case SOFT_DEBUGGER_REGISTER_CSAS:
Selector = (UINT16) CpuContext->Cs;
break;
case SOFT_DEBUGGER_REGISTER_SSAS:
Selector = (UINT16) CpuContext->Ss;
break;
case SOFT_DEBUGGER_REGISTER_GSAS:
Selector = (UINT16) CpuContext->Gs;
break;
case SOFT_DEBUGGER_REGISTER_FSAS:
Selector = (UINT16) CpuContext->Fs;
break;
case SOFT_DEBUGGER_REGISTER_ESAS:
Selector = (UINT16) CpuContext->Es;
break;
case SOFT_DEBUGGER_REGISTER_DSAS:
Selector = (UINT16) CpuContext->Ds;
case SOFT_DEBUGGER_REGISTER_LDTAS:
case SOFT_DEBUGGER_REGISTER_TSSAS:
return 0x00820000;
break;
}
Data32 = (UINT32) RShiftU64 (Ia32Gdt[Selector / 8].Uint64, 24);
return (Data32 & (UINT32)(~0xff)) | Selector;
}
/**
Read group register of Segment Base.
@param[in] CpuContext Pointer to saved CPU context.
@param[in] RegisterGroupSegBase Pointer to Group registers.
**/
VOID
ReadRegisterGroupSegBase (
IN DEBUG_CPU_CONTEXT *CpuContext,
IN DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGBASE *RegisterGroupSegBase
)
{
IA32_DESCRIPTOR *Ia32Descriptor;
IA32_GDT *Ia32Gdt;
UINTN Index;
Ia32Descriptor = (IA32_DESCRIPTOR *) CpuContext->Gdtr;
Ia32Gdt = (IA32_GDT *) (Ia32Descriptor->Base);
Index = CpuContext->Cs / 8;
RegisterGroupSegBase->CsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
Index = CpuContext->Ss / 8;
RegisterGroupSegBase->SsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
Index = CpuContext->Gs / 8;
RegisterGroupSegBase->GsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
Index = CpuContext->Fs / 8;
RegisterGroupSegBase->FsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
Index = CpuContext->Es / 8;
RegisterGroupSegBase->EsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
Index = CpuContext->Ds / 8;
RegisterGroupSegBase->DsBas = (Ia32Gdt[Index].Bits.BaseLow) + (Ia32Gdt[Index].Bits.BaseMid << 16) + (Ia32Gdt[Index].Bits.BaseMid << 24);
RegisterGroupSegBase->LdtBas = 0;
RegisterGroupSegBase->TssBas = 0;
}
/**
Read group register of Segment Limit.
@param[in] CpuContext Pointer to saved CPU context.
@param[in] RegisterGroupSegLim Pointer to Group registers.
**/
VOID
ReadRegisterGroupSegLim (
IN DEBUG_CPU_CONTEXT *CpuContext,
IN DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGLIM *RegisterGroupSegLim
)
{
IA32_DESCRIPTOR *Ia32Descriptor;
IA32_GDT *Ia32Gdt;
UINTN Index;
Ia32Descriptor = (IA32_DESCRIPTOR *) CpuContext->Gdtr;
Ia32Gdt = (IA32_GDT *) (Ia32Descriptor->Base);
Index = CpuContext->Cs / 8;
RegisterGroupSegLim->CsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->CsLim = (RegisterGroupSegLim->CsLim << 12) | 0xfff;
}
Index = CpuContext->Ss / 8;
RegisterGroupSegLim->SsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->SsLim = (RegisterGroupSegLim->SsLim << 12) | 0xfff;
}
Index = CpuContext->Gs / 8;
RegisterGroupSegLim->GsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->GsLim = (RegisterGroupSegLim->GsLim << 12) | 0xfff;
}
Index = CpuContext->Fs / 8;
RegisterGroupSegLim->FsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->FsLim = (RegisterGroupSegLim->FsLim << 12) | 0xfff;
}
Index = CpuContext->Es / 8;
RegisterGroupSegLim->EsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->EsLim = (RegisterGroupSegLim->EsLim << 12) | 0xfff;
}
Index = CpuContext->Ds / 8;
RegisterGroupSegLim->DsLim = Ia32Gdt[Index].Bits.LimitLow + (Ia32Gdt[Index].Bits.LimitHigh << 16);
if (Ia32Gdt[Index].Bits.Granularity == 1) {
RegisterGroupSegLim->DsLim = (RegisterGroupSegLim->DsLim << 12) | 0xfff;
}
RegisterGroupSegLim->LdtLim = 0xffff;
RegisterGroupSegLim->TssLim = 0xffff;
}
/**
Read group register by group index.
@param[in] CpuContext Pointer to saved CPU context.
@param[in] GroupIndex Group Index.
@retval RETURN_SUCCESS Read successfully.
@retval RETURN_NOT_SUPPORTED Group index cannot be supported.
**/
RETURN_STATUS
ArchReadRegisterGroup (
IN DEBUG_CPU_CONTEXT *CpuContext,
IN UINT8 GroupIndex
)
{
UINTN DataN;
DEBUG_DATA_REPONSE_READ_REGISTER_GROUP RegisterGroup;
DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGMENT_BAS_LIM RegisterGroupBasLim;
DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGMENT_BASES_X64 RegisterGroupBases64;
switch (GroupIndex) {
case SOFT_DEBUGGER_REGISTER_GROUP_SEGMENT64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGMENT));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_SEGMENT_BAS_LIM64:
DataN = (UINTN) (CpuContext->Idtr[0] & 0xffff);
RegisterGroupBasLim.IdtLim = DataN;
DataN = (UINTN) (CpuContext->Gdtr[0] & 0xffff);
RegisterGroupBasLim.GdtLim = DataN;
DataN = (UINTN) RShiftU64 (CpuContext->Idtr[0], 16);
DataN |= (UINTN) LShiftU64 (CpuContext->Idtr[1], sizeof (UINTN) * 8 - 16);
RegisterGroupBasLim.IdtBas = DataN;
DataN = (UINTN) RShiftU64 (CpuContext->Gdtr[0], 16);
DataN |= (UINTN) LShiftU64 (CpuContext->Gdtr[1], sizeof (UINTN) * 8 - 16);
RegisterGroupBasLim.GdtBas = DataN;
ReadRegisterGroupSegLim (CpuContext, (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGLIM *) &RegisterGroupBasLim.CsLim);
ReadRegisterGroupSegBase (CpuContext, (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGBASE *) &RegisterGroupBasLim.CsBas);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroupBasLim, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGMENT_BAS_LIM));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_GP2_64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup.Eflags, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_GP2));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_GP64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup.Eax, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_GP));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_DR64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup.Dr0, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_DR));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_SEGMENT_BASES64:
RegisterGroupBases64.Ldtr = (UINT16) CpuContext->Ldtr;
RegisterGroupBases64.Tr = (UINT16) CpuContext->Tr;
RegisterGroupBases64.Csas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_CSAS);
RegisterGroupBases64.Ssas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_SSAS);
RegisterGroupBases64.Gsas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_GSAS);
RegisterGroupBases64.Fsas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_FSAS);
RegisterGroupBases64.Esas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_ESAS);
RegisterGroupBases64.Dsas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_DSAS);
RegisterGroupBases64.Ldtas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_LDTAS);
RegisterGroupBases64.Tssas = ReadRegisterSelectorByIndex (CpuContext, SOFT_DEBUGGER_REGISTER_TSSAS);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroupBases64, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_SEGMENT_BASES_X64));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_CR64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup.Dr7 + 8, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_CR));
break;
case SOFT_DEBUGGER_REGISTER_GROUP_XMM64:
ReadRegisterGroup (CpuContext, &RegisterGroup);
SendDataResponsePacket (CpuContext, (UINT8 *) &RegisterGroup.Dr7 + 8 * 6, (UINT16) sizeof (DEBUG_DATA_REPONSE_READ_REGISTER_GROUP_XMM));
break;
default:
return RETURN_UNSUPPORTED;
}
return RETURN_SUCCESS;
}