/*++ BUILD Version: 0001    // Increment this if a change has global effects

Copyright (c) 1985-1993, Microsoft Corporation

Module Name:

    vdmdbg.h

Abstract:

    Prodecure declarations, constant definitions, type definition and macros
    for the VDMDBG.DLL VDM Debugger interface.

--*/

#ifndef _VDMDBG_
#define _VDMDBG_

#ifdef __cplusplus
extern "C" {
#endif

#include "pshpack4.h"

#define STATUS_VDM_EVENT    STATUS_SEGMENT_NOTIFICATION

#ifndef DBG_SEGLOAD
#define DBG_SEGLOAD     0
#define DBG_SEGMOVE     1
#define DBG_SEGFREE     2
#define DBG_MODLOAD     3
#define DBG_MODFREE     4
#define DBG_SINGLESTEP  5
#define DBG_BREAK       6
#define DBG_GPFAULT     7
#define DBG_DIVOVERFLOW 8
#define DBG_INSTRFAULT  9
#define DBG_TASKSTART   10
#define DBG_TASKSTOP    11
#define DBG_DLLSTART    12
#define DBG_DLLSTOP     13
#define DBG_ATTACH      14
#endif

//
// The following flags control the contents of the CONTEXT structure.
//

#define VDMCONTEXT_i386    0x00010000    // this assumes that i386 and
#define VDMCONTEXT_i486    0x00010000    // i486 have identical context records

#define VDMCONTEXT_CONTROL         (VDMCONTEXT_i386 | 0x00000001L) // SS:SP, CS:IP, FLAGS, BP
#define VDMCONTEXT_INTEGER         (VDMCONTEXT_i386 | 0x00000002L) // AX, BX, CX, DX, SI, DI
#define VDMCONTEXT_SEGMENTS        (VDMCONTEXT_i386 | 0x00000004L) // DS, ES, FS, GS
#define VDMCONTEXT_FLOATING_POINT  (VDMCONTEXT_i386 | 0x00000008L) // 387 state
#define VDMCONTEXT_DEBUG_REGISTERS (VDMCONTEXT_i386 | 0x00000010L) // DB 0-3,6,7

#define VDMCONTEXT_FULL (VDMCONTEXT_CONTROL | VDMCONTEXT_INTEGER |\
                      VDMCONTEXT_SEGMENTS)


#ifdef _X86_

// On x86 machines, just copy the definition of the CONTEXT and LDT_ENTRY
// structures.
typedef struct _CONTEXT VDMCONTEXT;
typedef struct _LDT_ENTRY VDMLDT_ENTRY;

#else // _X86_

//
//  Define the size of the 80387 save area, which is in the context frame.
//

#define SIZE_OF_80387_REGISTERS      80

typedef struct _FLOATING_SAVE_AREA {
    ULONG   ControlWord;
    ULONG   StatusWord;
    ULONG   TagWord;
    ULONG   ErrorOffset;
    ULONG   ErrorSelector;
    ULONG   DataOffset;
    ULONG   DataSelector;
    UCHAR   RegisterArea[SIZE_OF_80387_REGISTERS];
    ULONG   Cr0NpxState;
} FLOATING_SAVE_AREA;

//
// Simulated context structure for the 16-bit environment
//

typedef struct _VDMCONTEXT {

    //
    // The flags values within this flag control the contents of
    // a CONTEXT record.
    //
    // If the context record is used as an input parameter, then
    // for each portion of the context record controlled by a flag
    // whose value is set, it is assumed that that portion of the
    // context record contains valid context. If the context record
    // is being used to modify a threads context, then only that
    // portion of the threads context will be modified.
    //
    // If the context record is used as an IN OUT parameter to capture
    // the context of a thread, then only those portions of the thread's
    // context corresponding to set flags will be returned.
    //
    // The context record is never used as an OUT only parameter.
    //
    // CONTEXT_FULL on some systems (MIPS namely) does not contain the
    // CONTEXT_SEGMENTS definition.  VDMDBG assumes that CONTEXT_INTEGER also
    // includes CONTEXT_SEGMENTS to account for this.
    //

    ULONG ContextFlags;

    //
    // This section is specified/returned if CONTEXT_DEBUG_REGISTERS is
    // set in ContextFlags.  Note that CONTEXT_DEBUG_REGISTERS is NOT
    // included in CONTEXT_FULL.
    //

    ULONG   Dr0;
    ULONG   Dr1;
    ULONG   Dr2;
    ULONG   Dr3;
    ULONG   Dr6;
    ULONG   Dr7;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_FLOATING_POINT.
    //

    FLOATING_SAVE_AREA FloatSave;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_SEGMENTS.
    //

    ULONG   SegGs;
    ULONG   SegFs;
    ULONG   SegEs;
    ULONG   SegDs;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_INTEGER.
    //

    ULONG   Edi;
    ULONG   Esi;
    ULONG   Ebx;
    ULONG   Edx;
    ULONG   Ecx;
    ULONG   Eax;

    //
    // This section is specified/returned if the
    // ContextFlags word contians the flag CONTEXT_CONTROL.
    //

    ULONG   Ebp;
    ULONG   Eip;
    ULONG   SegCs;              // MUST BE SANITIZED
    ULONG   EFlags;             // MUST BE SANITIZED
    ULONG   Esp;
    ULONG   SegSs;

} VDMCONTEXT;

//
//  LDT descriptor entry
//

typedef struct _VDMLDT_ENTRY {
    USHORT  LimitLow;
    USHORT  BaseLow;
    union {
        struct {
            UCHAR   BaseMid;
            UCHAR   Flags1;     // Declare as bytes to avoid alignment
            UCHAR   Flags2;     // Problems.
            UCHAR   BaseHi;
        } Bytes;
        struct {
            ULONG   BaseMid : 8;
            ULONG   Type : 5;
            ULONG   Dpl : 2;
            ULONG   Pres : 1;
            ULONG   LimitHi : 4;
            ULONG   Sys : 1;
            ULONG   Reserved_0 : 1;
            ULONG   Default_Big : 1;
            ULONG   Granularity : 1;
            ULONG   BaseHi : 8;
        } Bits;
    } HighWord;
} VDMLDT_ENTRY;


#endif // _X86_

typedef VDMCONTEXT *LPVDMCONTEXT;
typedef VDMLDT_ENTRY *LPVDMLDT_ENTRY;

#define VDMCONTEXT_TO_PROGRAM_COUNTER(Context) (PVOID)((Context)->Eip)

#define VDMCONTEXT_LENGTH  (sizeof(VDMCONTEXT))
#define VDMCONTEXT_ALIGN   (sizeof(ULONG))
#define VDMCONTEXT_ROUND   (VDMCONTEXT_ALIGN - 1)

#define V86FLAGS_CARRY      0x00001
#define V86FLAGS_PARITY     0x00004
#define V86FLAGS_AUXCARRY   0x00010
#define V86FLAGS_ZERO       0x00040
#define V86FLAGS_SIGN       0x00080
#define V86FLAGS_TRACE      0x00100
#define V86FLAGS_INTERRUPT  0x00200
#define V86FLAGS_DIRECTION  0x00400
#define V86FLAGS_OVERFLOW   0x00800
#define V86FLAGS_IOPL       0x03000
#define V86FLAGS_IOPL_BITS  0x12
#define V86FLAGS_RESUME     0x10000
#define V86FLAGS_V86        0x20000     // Used to detect RealMode v. ProtMode
#define V86FLAGS_ALIGNMENT  0x40000

#define MAX_MODULE_NAME  8 + 1
#define MAX_PATH16      255

typedef struct _SEGMENT_NOTE {
    WORD    Selector1;                      // Selector of operation
    WORD    Selector2;                      // Dest. Sel. for moving segments
    WORD    Segment;                        // Segment within Module
    CHAR    Module[MAX_MODULE_NAME+1];      // Module name
    CHAR    FileName[MAX_PATH16+1];         // PathName to executable image
    WORD    Type;                           // Code / Data, etc.
    DWORD   Length;                         // Length of image
} SEGMENT_NOTE;

typedef struct _IMAGE_NOTE {
    CHAR    Module[MAX_MODULE_NAME+1];      // Module
    CHAR    FileName[MAX_PATH16+1];         // Path to executable image
    WORD    hModule;                        // 16-bit hModule
    WORD    hTask;                          // 16-bit hTask
} IMAGE_NOTE;

typedef struct {
    DWORD   dwSize;
    char    szModule[MAX_MODULE_NAME+1];
    HANDLE  hModule;
    WORD    wcUsage;
    char    szExePath[MAX_PATH16+1];
    WORD    wNext;
} MODULEENTRY, *LPMODULEENTRY;

/* GlobalFirst()/GlobalNext() flags */
#define GLOBAL_ALL      0
#define GLOBAL_LRU      1
#define GLOBAL_FREE     2

/* GLOBALENTRY.wType entries */
#define GT_UNKNOWN      0
#define GT_DGROUP       1
#define GT_DATA         2
#define GT_CODE         3
#define GT_TASK         4
#define GT_RESOURCE     5
#define GT_MODULE       6
#define GT_FREE         7
#define GT_INTERNAL     8
#define GT_SENTINEL     9
#define GT_BURGERMASTER 10

/* If GLOBALENTRY.wType==GT_RESOURCE, the following is GLOBALENTRY.wData: */
#define GD_USERDEFINED      0
#define GD_CURSORCOMPONENT  1
#define GD_BITMAP           2
#define GD_ICONCOMPONENT    3
#define GD_MENU             4
#define GD_DIALOG           5
#define GD_STRING           6
#define GD_FONTDIR          7
#define GD_FONT             8
#define GD_ACCELERATORS     9
#define GD_RCDATA           10
#define GD_ERRTABLE         11
#define GD_CURSOR           12
#define GD_ICON             14
#define GD_NAMETABLE        15
#define GD_MAX_RESOURCE     15

typedef struct {
    DWORD   dwSize;
    DWORD   dwAddress;
    DWORD   dwBlockSize;
    HANDLE  hBlock;
    WORD    wcLock;
    WORD    wcPageLock;
    WORD    wFlags;
    BOOL    wHeapPresent;
    HANDLE  hOwner;
    WORD    wType;
    WORD    wData;
    DWORD   dwNext;
    DWORD   dwNextAlt;
} GLOBALENTRY, *LPGLOBALENTRY;

typedef DWORD (CALLBACK* DEBUGEVENTPROC)( LPDEBUG_EVENT, LPVOID );

// Macros to access VDM_EVENT parameters
#define W1(x) ((USHORT)(x.ExceptionInformation[0]))
#define W2(x) ((USHORT)(x.ExceptionInformation[0] >> 16))
#define W3(x) ((USHORT)(x.ExceptionInformation[1]))
#define W4(x) ((USHORT)(x.ExceptionInformation[1] >> 16))
#define DW3(x) (x.ExceptionInformation[2])
#define DW4(x) (x.ExceptionInformation[3])

#include "poppack.h"

BOOL
WINAPI
VDMProcessException(
    LPDEBUG_EVENT   lpDebugEvent
    );

BOOL
WINAPI
VDMGetThreadSelectorEntry(
    HANDLE          hProcess,
    HANDLE          hThread,
    WORD            wSelector,
    LPVDMLDT_ENTRY  lpSelectorEntry
    );

ULONG
WINAPI
VDMGetPointer(
    HANDLE          hProcess,
    HANDLE          hThread,
    WORD            wSelector,
    DWORD           dwOffset,
    BOOL            fProtMode
    );

BOOL
WINAPI
VDMGetThreadContext(
    LPDEBUG_EVENT   lpDebugEvent,
    LPVDMCONTEXT    lpVDMContext
);

BOOL
WINAPI
VDMSetThreadContext(
    LPDEBUG_EVENT   lpDebugEvent,
    LPVDMCONTEXT    lpVDMContext
);

BOOL
WINAPI
VDMGetSelectorModule(
    HANDLE          hProcess,
    HANDLE          hThread,
    WORD            wSelector,
    PUINT           lpSegmentNumber,
    LPSTR           lpModuleName,
    UINT            nNameSize,
    LPSTR           lpModulePath,
    UINT            nPathSize
);

BOOL
WINAPI
VDMGetModuleSelector(
    HANDLE          hProcess,
    HANDLE          hThread,
    UINT            wSegmentNumber,
    LPSTR           lpModuleName,
    LPWORD          lpSelector
);

BOOL
WINAPI
VDMModuleFirst(
    HANDLE          hProcess,
    HANDLE          hThread,
    LPMODULEENTRY   lpModuleEntry,
    DEBUGEVENTPROC  lpEventProc,
    LPVOID          lpData
);

BOOL
WINAPI
VDMModuleNext(
    HANDLE          hProcess,
    HANDLE          hThread,
    LPMODULEENTRY   lpModuleEntry,
    DEBUGEVENTPROC  lpEventProc,
    LPVOID          lpData
);

BOOL
WINAPI
VDMGlobalFirst(
    HANDLE          hProcess,
    HANDLE          hThread,
    LPGLOBALENTRY   lpGlobalEntry,
    WORD            wFlags,
    DEBUGEVENTPROC  lpEventProc,
    LPVOID          lpData
);

BOOL
WINAPI
VDMGlobalNext(
    HANDLE          hProcess,
    HANDLE          hThread,
    LPGLOBALENTRY   lpGlobalEntry,
    WORD            wFlags,
    DEBUGEVENTPROC  lpEventProc,
    LPVOID          lpData
);

typedef BOOL (WINAPI *PROCESSENUMPROC)( DWORD dwProcessId, DWORD dwAttributes, LPARAM lpUserDefined );
typedef BOOL (WINAPI *TASKENUMPROC)( DWORD dwThreadId, WORD hMod16, WORD hTask16, LPARAM lpUserDefined );

#define WOW_SYSTEM  (DWORD)0x0001

INT
WINAPI
VDMEnumProcessWOW(
    PROCESSENUMPROC fp,
    LPARAM          lparam
);

INT
WINAPI
VDMEnumTaskWOW(
    DWORD           dwProcessId,
    TASKENUMPROC    fp,
    LPARAM          lparam
);

BOOL
WINAPI
VDMKillWOW(
    VOID
);

BOOL
WINAPI
VDMDetectWOW(
    VOID
);

BOOL
WINAPI
VDMBreakThread(
    HANDLE          hProcess,
    HANDLE          hThread
);

#ifdef __cplusplus
}
#endif

#endif // _VDMDBG_
