Source code of Windows XP (NT5)
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//----------------------------------------------------------------------------
//
// Abstraction of processor-specific information.
//
// Copyright (C) Microsoft Corporation, 1999-2001.
//
//----------------------------------------------------------------------------
#ifndef __MACHINE_HPP__
#define __MACHINE_HPP__
// These context information states are intended to be shared among
// processors so they may not all apply to each processor. The important
// thing is that they are ordered from less information to more.
// Each state includes all the information from the states that precede it.
// More states can be inserted anywhere as new processors require them.
#define MCTX_NONE 0 // No context information.
#define MCTX_PC 1 // Program counter.
#define MCTX_DR67_REPORT 2 // X86: DR6,7 control report.
#define MCTX_REPORT 3 // Control report.
#define MCTX_CONTEXT 4 // Kernel protocol context information.
#define MCTX_FULL 5 // All possible information.
#define MCTX_DIRTY 6 // Dirty context, implies full information.
// Constant offset value returned from GetNextOffset to indicate the
// trace flag should be used.
#define OFFSET_TRACE ((ULONG64)(LONG64)-1)
#define OFFSET_TRACE_32 ((ULONG)OFFSET_TRACE)
// Distinguished error code for GetVirtualTranslationPhysicalOffsets
// to indicate that all translations were successful but
// the page was not present. In this case the LastVal value
// will contain the page file offset and PfIndex will contain
// the page file number.
#define HR_PAGE_IN_PAGE_FILE HRESULT_FROM_NT(STATUS_PAGE_FAULT_PAGING_FILE)
// Translation could not complete and a page file location
// for the data could not be determined.
#define HR_PAGE_NOT_AVAILABLE HRESULT_FROM_NT(STATUS_NO_PAGEFILE)
#define MAX_PAGING_FILE_MASK 0xf
//
// Segment register access.
// Processors which do not support segment registers return
// zero for the segment register number.
//
enum
{
// Descriptor table pseudo-segments. The GDT does
// not have a specific register number.
// These pseudo-segments should be first so that
// index zero is not used for a normal segreg.
SEGREG_GDT,
SEGREG_LDT,
// Generic segments.
SEGREG_CODE,
SEGREG_DATA,
SEGREG_STACK,
// Extended segments.
SEGREG_ES,
SEGREG_FS,
SEGREG_GS,
SEGREG_COUNT
};
//
// Segment descriptor values.
// Due to the descriptor caching that x86 processors
// do this may differ from the actual in-memory descriptor and
// may be retrieved in a much different way.
//
// Special flags value that marks a descriptor as invalid.
#define SEGDESC_INVALID 0xffffffff
#define X86_DESC_TYPE(Flags) ((Flags) & 0x1f)
#define X86_DESC_PRIVILEGE_SHIFT 5
#define X86_DESC_PRIVILEGE(Flags) (((Flags) >> X86_DESC_PRIVILEGE_SHIFT) & 3)
#define X86_DESC_PRESENT 0x80
#define X86_DESC_LONG_MODE 0x200
#define X86_DESC_DEFAULT_BIG 0x400
#define X86_DESC_GRANULARITY 0x800
typedef struct _DESCRIPTOR64
{
ULONG64 Base;
ULONG64 Limit;
ULONG Flags;
} DESCRIPTOR64, *PDESCRIPTOR64;
#define FORM_VM86 0x00000001
#define FORM_CODE 0x00000002
#define FORM_SEGREG 0x00000004
#define X86_FORM_VM86(Efl) \
(X86_IS_VM86(Efl) ? FORM_VM86 : 0)
//----------------------------------------------------------------------------
//
// Abstract interface for machine information. All possible
// machine-specific implementations of this interface exist at
// all times. The effective implementation is selected when
// SetEffMachine is called. For generic access the abstract
// interface should be used. In machine-specific code the
// specific implementation classes can be used.
//
// IMPORTANT: Be very careful when using machine-specific header files
// such as nt<plat>.h. The machine implementation class is
// compiled for all platforms so the nt<plat>.h file will be the
// one for the build platform, not necessarily the platform
// of the machine implementation. ntdbg.h contains many cross-platform
// types and definitions that can be used to avoid problems.
//
//----------------------------------------------------------------------------
extern BOOL g_PrefixSymbols;
extern BOOL g_ContextChanged;
extern DEBUG_PROCESSOR_IDENTIFICATION_ALL g_InitProcessorId;
struct RegisterGroup
{
RegisterGroup* Next;
// Counted automatically.
ULONG NumberRegs;
// Regs is assumed to be non-NULL in all groups.
// SubRegs and AllExtraDesc may be NULL in any group.
REGDEF* Regs;
REGSUBDEF* SubRegs;
REGALLDESC* AllExtraDesc;
};
// Trace modes used by SetTraceMode/GetTraceMode functions
typedef enum
{
TRACE_NONE,
TRACE_INSTRUCTION,
TRACE_TAKEN_BRANCH
} TRACEMODE;
// These enumerants are abstract values but currently
// only IA64 actually has different page directories
// so set them up to match the IA64 mapping for convenience.
enum
{
PAGE_DIR_USER,
PAGE_DIR_SESSION,
PAGE_DIR_KERNEL = 7,
PAGE_DIR_COUNT
};
// For machines which only support a single page directory
// take it from the kernel slot. All will be updated so
// this is an arbitrary choice.
#define PAGE_DIR_SINGLE PAGE_DIR_KERNEL
// All directories bit mask.
#define PAGE_DIR_ALL ((1 << PAGE_DIR_COUNT) - 1)
// Flags for GetPrefixedSymbolOffset.
#define GETPREF_VERBOSE 0x00000001
class MachineInfo
{
public:
// Descriptive information.
PCSTR m_FullName;
PCSTR m_AbbrevName;
ULONG m_PageSize;
ULONG m_PageShift;
ULONG m_NumExecTypes;
// First ExecTypes entry must be the actual processor type.
PULONG m_ExecTypes;
BOOL m_Ptr64;
// Automatically counted from regs in base Initialize.
ULONG m_NumberRegs;
RegisterGroup* m_Groups;
ULONG m_AllMask;
// Collected automatically from groups.
ULONG m_AllMaskBits;
ULONG m_MaxDataBreakpoints;
PCSTR m_SymPrefix;
// Computed automatically.
ULONG m_SymPrefixLen;
// Hard-coded type information for machine and platform version.
ULONG m_OffsetPrcbProcessorState;
ULONG m_OffsetPrcbNumber;
ULONG64 m_TriagePrcbOffset;
ULONG m_SizePrcb;
ULONG m_OffsetKThreadApcProcess;
ULONG m_OffsetKThreadTeb;
ULONG m_OffsetKThreadInitialStack;
ULONG m_OffsetEprocessPeb;
ULONG m_OffsetEprocessDirectoryTableBase;
ULONG m_OffsetKThreadNextProcessor;
// Size of the native context for the target machine.
ULONG m_SizeTargetContext;
// Offset of the flags ULONG in the native context.
ULONG m_OffsetTargetContextFlags;
// Control space offset for special registers.
ULONG m_OffsetSpecialRegisters;
// Size of the canonical context kept in the MachineInfo.
ULONG m_SizeCanonicalContext;
// System version of the canonical context. Can be compared
// against g_SystemVersion to see if the target provides
// canonical contexts or not.
ULONG m_SverCanonicalContext;
ULONG m_SizeControlReport;
ULONG m_SizeEThread;
ULONG m_SizeEProcess;
ULONG m_SizeKspecialRegisters;
// Size of the debugger's *_THREAD partial structure.
ULONG m_SizePartialKThread;
ULONG64 m_SharedUserDataOffset;
// Context could be kept per-thread
// so that several can be around at once for a cache.
// That would also make the save/restore stuff unnecessary.
ULONG m_ContextState;
CROSS_PLATFORM_CONTEXT m_Context;
// Segment register descriptors. These will only
// be valid on processors that support them, otherwise
// they will be marked invalid.
DESCRIPTOR64 m_SegRegDesc[SEGREG_COUNT];
DESCRIPTOR64 m_SavedSegRegDesc[SEGREG_COUNT];
// Holds the current page directory offsets.
ULONG64 m_PageDirectories[PAGE_DIR_COUNT];
BOOL m_Translating;
BOOL m_ContextIsReadOnly;
// InitializeConstants initializes information which is
// fixed and unaffected by the type of target being debugged.
// InitializeForTarget initializes information which
// varies according to the particular type of target being debugged.
// InitializeForProcessor initializes information which
// varies according to the particular type of processor that's
// present in the target as described by g_InitProcessorId.
// Derived classes should call base Initialize* after
// their own initialization.
virtual HRESULT InitializeConstants(void);
virtual HRESULT InitializeForTarget(void);
virtual HRESULT InitializeForProcessor(void);
virtual void InitializeContext
(ULONG64 Pc, PDBGKD_ANY_CONTROL_REPORT ControlReport) = 0;
HRESULT GetContextState(ULONG State);
HRESULT SetContext(void);
// Base implementations use Get/SetThreadContext for
// any request.
virtual HRESULT UdGetContextState(ULONG State);
virtual HRESULT UdSetContext(void);
virtual HRESULT KdGetContextState(ULONG State) = 0;
virtual HRESULT KdSetContext(void) = 0;
// Base implementation sets ContextState to NONE.
virtual void InvalidateContext(void);
// Context conversion is version-based rather than size-based
// as the size is ambiguous in certain cases. For example,
// ALPHA_CONTEXT and ALPHA_NT5_CONTEXT are the same size
// so additional information is necessary to distinguish them.
virtual HRESULT ConvertContextFrom(PCROSS_PLATFORM_CONTEXT Context,
ULONG FromSver,
ULONG FromSize, PVOID From) = 0;
virtual HRESULT ConvertContextTo(PCROSS_PLATFORM_CONTEXT Context,
ULONG ToSver, ULONG ToSize, PVOID To) = 0;
virtual void InitializeContextFlags(PCROSS_PLATFORM_CONTEXT Context,
ULONG Version) = 0;
virtual HRESULT GetContextFromThreadStack(ULONG64 ThreadBase,
PCROSS_PLATFORM_THREAD Thread,
PCROSS_PLATFORM_CONTEXT Context,
PDEBUG_STACK_FRAME Frame,
PULONG RunningOnProc) = 0;
// Base implementations return E_NOTIMPL.
virtual HRESULT GetExdiContext(IUnknown* Exdi, PEXDI_CONTEXT Context);
virtual HRESULT SetExdiContext(IUnknown* Exdi, PEXDI_CONTEXT Context);
virtual void ConvertExdiContextFromContext(PCROSS_PLATFORM_CONTEXT Context,
PEXDI_CONTEXT ExdiContext);
virtual void ConvertExdiContextToContext(PEXDI_CONTEXT ExdiContext,
PCROSS_PLATFORM_CONTEXT Context);
virtual void ConvertExdiContextToSegDescs(PEXDI_CONTEXT ExdiContext,
ULONG Start, ULONG Count,
PDESCRIPTOR64 Descs);
virtual void ConvertExdiContextFromSpecial
(PCROSS_PLATFORM_KSPECIAL_REGISTERS Special,
PEXDI_CONTEXT ExdiContext);
virtual void ConvertExdiContextToSpecial
(PEXDI_CONTEXT ExdiContext,
PCROSS_PLATFORM_KSPECIAL_REGISTERS Special);
// A simple one-deep temporary save stack for CONTEXT information.
// Useful when you want to swap in an arbitrary context for
// some machine operation. This uses the same save area
// as KdSave/RestoreProcessorState so the two should
// not be used together.
void PushContext(PCROSS_PLATFORM_CONTEXT Context)
{
DBG_ASSERT (!m_ContextIsReadOnly);
m_SavedContextState = m_ContextState;
m_SavedContext = m_Context;
memcpy(m_SavedSegRegDesc, m_SegRegDesc, sizeof(m_SegRegDesc));
m_Context = *Context;
m_ContextState = MCTX_FULL;
m_ContextIsReadOnly = TRUE;
}
void PopContext(void)
{
DBG_ASSERT((m_ContextState != MCTX_DIRTY) && (m_ContextIsReadOnly));
m_Context = m_SavedContext;
m_ContextState = m_SavedContextState;
memcpy(m_SegRegDesc, m_SavedSegRegDesc, sizeof(m_SegRegDesc));
m_ContextIsReadOnly = FALSE;
}
virtual int GetType(ULONG index) = 0;
virtual BOOL GetVal(ULONG index, REGVAL *val) = 0;
virtual BOOL SetVal(ULONG index, REGVAL *val) = 0;
virtual void GetPC(PADDR Address) = 0;
virtual void SetPC(PADDR Address) = 0;
virtual void GetFP(PADDR Address) = 0;
virtual void GetSP(PADDR Address) = 0;
virtual ULONG64 GetArgReg(void) = 0;
// Base implementations return zero and FALSE.
virtual ULONG GetSegRegNum(ULONG SegReg);
virtual HRESULT GetSegRegDescriptor(ULONG SegReg, PDESCRIPTOR64 Desc);
virtual void OutputAll(ULONG Mask, ULONG OutMask) = 0;
virtual TRACEMODE GetTraceMode(void) = 0;
virtual void SetTraceMode(TRACEMODE Mode) = 0;
// Returns true if trace mode appropriate to specified execution status
// (e.g. DEBUG_STATUS_STEP_OVER, DEBUG_STATUS_STEP_INTO,
// DEBUG_STATUS_STEP_BRANCH...) supported by the machine.
virtual BOOL IsStepStatusSupported(ULONG Status) = 0;
void QuietSetTraceMode(TRACEMODE Mode)
{
BOOL ContextChangedOrg = g_ContextChanged;
SetTraceMode(Mode);
g_ContextChanged = ContextChangedOrg;
}
// Base implementation does nothing.
virtual void KdUpdateControlSet
(PDBGKD_ANY_CONTROL_SET ControlSet);
// Base implementations save and restore m_Context and m_ContextState.
virtual void KdSaveProcessorState(void);
virtual void KdRestoreProcessorState(void);
virtual ULONG ExecutingMachine(void) = 0;
virtual HRESULT SetPageDirectory(ULONG Idx, ULONG64 PageDir,
PULONG NextIdx) = 0;
HRESULT SetDefaultPageDirectories(ULONG Mask);
virtual HRESULT GetVirtualTranslationPhysicalOffsets
(ULONG64 Virt, PULONG64 Offsets, ULONG OffsetsSize,
PULONG Levels, PULONG PfIndex, PULONG64 LastVal) = 0;
virtual HRESULT GetBaseTranslationVirtualOffset(PULONG64 Offset) = 0;
virtual void Assemble(PADDR Addr, PSTR Input) = 0;
virtual BOOL Disassemble(PADDR Addr, PSTR Buffer, BOOL EffAddr) = 0;
// Creates new Breakpoint object compatible with specific machine
virtual HRESULT NewBreakpoint(DebugClient* Client,
ULONG Type,
ULONG Id,
Breakpoint** RetBp);
virtual BOOL IsBreakpointInstruction(PADDR Addr) = 0;
virtual HRESULT InsertBreakpointInstruction(PUSER_DEBUG_SERVICES Services,
ULONG64 Process,
ULONG64 Offset,
PUCHAR SaveInstr,
PULONG64 ChangeStart,
PULONG ChangeLen) = 0;
virtual HRESULT RemoveBreakpointInstruction(PUSER_DEBUG_SERVICES Services,
ULONG64 Process,
ULONG64 Offset,
PUCHAR SaveInstr,
PULONG64 ChangeStart,
PULONG ChangeLen) = 0;
virtual void AdjustPCPastBreakpointInstruction(PADDR Addr,
ULONG BreakType) = 0;
// Base implementations do nothing for platforms which
// do not support data breakpoints.
virtual void InsertAllDataBreakpoints(void);
virtual void RemoveAllDataBreakpoints(void);
// Base implementation returns EXCEPTION_BRAKEPOINT_ANY
// for STATUS_BREAKPOINT.
virtual ULONG IsBreakpointOrStepException(PEXCEPTION_RECORD64 Record,
ULONG FirstChance,
PADDR BpAddr,
PADDR RelAddr);
virtual BOOL IsCallDisasm(PCSTR Disasm) = 0;
virtual BOOL IsReturnDisasm(PCSTR Disasm) = 0;
virtual BOOL IsSystemCallDisasm(PCSTR Disasm) = 0;
virtual BOOL IsDelayInstruction(PADDR Addr) = 0;
virtual void GetEffectiveAddr(PADDR Addr) = 0;
// Some processors, such as IA64, have instructions which
// switch between instruction sets, thus the machine type
// of the next offset may be different from the current machine.
// If the NextAddr is OFFSET_TRACE the NextMachine is ignored.
virtual void GetNextOffset(BOOL StepOver,
PADDR NextAddr, PULONG NextMachine) = 0;
// Base implementation returns the value from StackWalk.
virtual void GetRetAddr(PADDR Addr);
// Base implementation does nothing for machines which
// do not have symbol prefixing.
virtual BOOL GetPrefixedSymbolOffset(ULONG64 SymOffset,
ULONG Flags,
PULONG64 PrefixedSymOffset);
virtual void IncrementBySmallestInstruction(PADDR Addr) = 0;
virtual void DecrementBySmallestInstruction(PADDR Addr) = 0;
virtual BOOL DisplayTrapFrame(ULONG64 FrameAddress,
PCROSS_PLATFORM_CONTEXT Context) = 0;
virtual void ValidateCxr(PCROSS_PLATFORM_CONTEXT Context) = 0;
// Output function entry information for the given entry.
virtual void OutputFunctionEntry(PVOID RawEntry) = 0;
// Base implementation returns E_UNEXPECTED.
virtual HRESULT ReadDynamicFunctionTable(ULONG64 Table,
PULONG64 NextTable,
PULONG64 MinAddress,
PULONG64 MaxAddress,
PULONG64 BaseAddress,
PULONG64 TableData,
PULONG TableSize,
PWSTR OutOfProcessDll,
PCROSS_PLATFORM_DYNAMIC_FUNCTION_TABLE RawTable);
// Base implementation returns NULL.
virtual PVOID FindDynamicFunctionEntry(PCROSS_PLATFORM_DYNAMIC_FUNCTION_TABLE Table,
ULONG64 Address,
PVOID TableData,
ULONG TableSize);
virtual HRESULT ReadKernelProcessorId
(ULONG Processor, PDEBUG_PROCESSOR_IDENTIFICATION_ALL Id) = 0;
// Base implementation discards page directory entries.
virtual void FlushPerExecutionCaches(void);
// Stack output functions
virtual void PrintStackFrameAddressesTitle(ULONG Flags);
virtual void PrintStackFrameAddresses(ULONG Flags,
PDEBUG_STACK_FRAME StackFrame);
virtual void PrintStackArgumentsTitle(ULONG Flags);
virtual void PrintStackArguments(ULONG Flags,
PDEBUG_STACK_FRAME StackFrame);
virtual void PrintStackCallSiteTitle(ULONG Flags);
virtual void PrintStackCallSite(ULONG Flags,
PDEBUG_STACK_FRAME StackFrame,
CHAR SymBuf[], DWORD64 Displacement,
USHORT StdCallArgs);
virtual void PrintStackNonvolatileRegisters(ULONG Flags,
PDEBUG_STACK_FRAME StackFrame,
PCROSS_PLATFORM_CONTEXT Context,
ULONG FrameNum);
//
// IMPORTANT
//
// Helpers for convenient value access. When in machine code
// these helpers are preferred to Get/SetRegVal* because
// they stay in the same machine whereas the generic code
// always uses g_Machine. If a caller makes a direct call
// on a specific machine g_Machine may not match so the
// generic code will not work properly.
//
// Note that the set methods here do not get the register
// type as is done in the generic code. All of these methods
// assume that the proper call is being made for the register.
// The Get/SetReg methods also only operate on real registers, not
// subregisters. Use the Get/SetSubReg methods when dealing
// with subregisters.
//
USHORT GetReg16(ULONG Reg)
{
REGVAL RegVal;
RegVal.i64 = 0;
GetVal(Reg, &RegVal);
return RegVal.i16;
}
ULONG GetReg32(ULONG Reg)
{
REGVAL RegVal;
RegVal.i64 = 0;
GetVal(Reg, &RegVal);
return RegVal.i32;
}
void SetReg32(ULONG Reg, ULONG Val)
{
REGVAL RegVal;
RegVal.type = REGVAL_INT32;
RegVal.i64 = 0;
RegVal.i32 = Val;
SetVal(Reg, &RegVal);
}
ULONG64 GetReg64(ULONG Reg)
{
REGVAL RegVal;
RegVal.i64 = 0;
GetVal(Reg, &RegVal);
return RegVal.i64;
}
void SetReg64(ULONG Reg, ULONG64 Val)
{
REGVAL RegVal;
RegVal.type = REGVAL_INT64;
RegVal.i64 = Val;
RegVal.Nat = FALSE;
SetVal(Reg, &RegVal);
}
ULONG GetSubReg32(ULONG SubReg)
{
REGVAL RegVal;
REGSUBDEF* SubDef = RegSubDefFromIndex(SubReg);
if (!SubDef)
{
return 0;
}
RegVal.i64 = 0;
GetVal(SubDef->fullreg, &RegVal);
return (ULONG)((RegVal.i64 >> SubDef->shift) & SubDef->mask);
}
// Helper function to initialize an ADDR given a flat
// offset from a known segment or segment register.
void FormAddr(ULONG SegOrReg, ULONG64 Off, ULONG Flags,
PADDR Address);
protected:
TRACEMODE m_TraceMode;
// KdSave/Restore state.
ULONG m_SavedContextState;
CROSS_PLATFORM_CONTEXT m_SavedContext;
// Common helpers for disassembly.
PCHAR m_Buf, m_BufStart;
void BufferHex(ULONG64 Value, ULONG Length, BOOL Signed);
void BufferBlanks(ULONG BufferPos);
void BufferString(PCSTR String);
void PrintMultiPtrTitle(const CHAR* Title, USHORT PtrNum);
};
// Effective machine settings.
extern ULONG g_EffMachine;
extern MachineIndex g_EffMachineIndex;
extern MachineInfo* g_Machine;
// Target machine settings.
extern MachineInfo* g_TargetMachine;
extern MachineInfo* g_AllMachines[];
HRESULT InitializeMachines(ULONG TargetMachine);
MachineIndex MachineTypeIndex(ULONG Machine);
// g_AllMachines has a NULL at MACHIDX_COUNT to handle errors.
#define MachineTypeInfo(Machine) g_AllMachines[MachineTypeIndex(Machine)]
void CacheReportInstructions(ULONG64 Pc, ULONG Count, PUCHAR Stream);
void FlushMachinePerExecutionCaches(void);
extern CHAR g_F0[], g_F1[], g_F2[], g_F3[], g_F4[], g_F5[];
extern CHAR g_F6[], g_F7[], g_F8[], g_F9[], g_F10[], g_F11[];
extern CHAR g_F12[], g_F13[], g_F14[], g_F15[], g_F16[], g_F17[];
extern CHAR g_F18[], g_F19[], g_F20[], g_F21[], g_F22[], g_F23[];
extern CHAR g_F24[], g_F25[], g_F26[], g_F27[], g_F28[], g_F29[];
extern CHAR g_F30[], g_F31[];
extern CHAR g_R0[], g_R1[], g_R2[], g_R3[], g_R4[], g_R5[];
extern CHAR g_R6[], g_R7[], g_R8[], g_R9[], g_R10[], g_R11[];
extern CHAR g_R12[], g_R13[], g_R14[], g_R15[], g_R16[], g_R17[];
extern CHAR g_R18[], g_R19[], g_R20[], g_R21[], g_R22[], g_R23[];
extern CHAR g_R24[], g_R25[], g_R26[], g_R27[], g_R28[], g_R29[];
extern CHAR g_R30[], g_R31[];
#endif // #ifndef __MACHINE_HPP__