411 lines
12 KiB
NASM
411 lines
12 KiB
NASM
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;--------------------------------------------------------------------------
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ifdef DEBUG
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DEBUG_RETAIL equ 1
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endif ; ifdef DEBUG
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;--------------------------------------------------------------------------
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?PLM = 1
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?WIN = 0
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PMODE = 1
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.xlist
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include cmacros.inc
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include windows.inc
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include mmsystem.inc
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; include logerror.inc
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include mmddk.inc
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.list
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;--------------------------------------------------------------------------
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;/* Error modifier bits */
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ERR_WARNING equ 08000h
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ERR_PARAM equ 04000h
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;/* Generic parameter values */
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ERR_BAD_VALUE equ 06001h
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ERR_BAD_FLAGS equ 06002h
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ERR_BAD_INDEX equ 06003h
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ERR_BAD_DVALUE equ 07004h
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ERR_BAD_DFLAGS equ 07005h
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ERR_BAD_DINDEX equ 07006h
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ERR_BAD_PTR equ 07007h
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ERR_BAD_FUNC_PTR equ 07008h
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ERR_BAD_SELECTOR equ 06009h
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ERR_BAD_STRING_PTR equ 0700ah
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ERR_BAD_HANDLE equ 0600bh
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;/* KERNEL parameter errors */
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ERR_BAD_HINSTANCE equ 06020h
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ERR_BAD_HMODULE equ 06021h
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ERR_BAD_GLOBAL_HANDLE equ 06022h
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ERR_BAD_LOCAL_HANDLE equ 06023h
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ERR_BAD_ATOM equ 06024h
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ERR_BAD_HFILE equ 06025h
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;/* USER parameter errors */
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ERR_BAD_HWND equ 06040h
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ERR_BAD_HMENU equ 06041h
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ERR_BAD_HCURSOR equ 06042h
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ERR_BAD_HICON equ 06043h
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ERR_BAD_HDWP equ 06044h
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ERR_BAD_CID equ 06045h
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ERR_BAD_HDRVR equ 06046h
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DBF_TRACE equ 00000h
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DBF_WARNING equ 04000h
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DBF_ERROR equ 08000h
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DBF_FATAL equ 0c000h
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; [Windows] DebugFilter and flags values
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DBF_KERNEL equ 01000h
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DBF_USER equ 00800h
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DBF_GDI equ 00400h
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DBF_MMSYSTEM equ 00040h
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DBF_PENWIN equ 00020h
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DBF_APPLICATION equ 00010h
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DBF_DRIVER equ 00008h
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;--------------------------------------------------------------------------
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AssertF macro reg
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local assert_ok
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ifdef DEBUG
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or reg,reg
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jnz assert_ok
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int 3
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assert_ok:
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endif
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endm
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AssertT macro reg
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local assert_ok
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ifdef DEBUG
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or reg,reg
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jz assert_ok
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int 3
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assert_ok:
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endif
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endm
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;--------------------------------------------------------------------------
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;
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; DebugErr() macro
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;
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ifdef DEBUG_RETAIL
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externFP _DebugOutput ; in KERNEL (3.1 or above)
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DebugErr macro flags,msg
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local a,b
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push cs
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push offset a
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push flags or DBF_DRIVER
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call _DebugOutput
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add sp,6
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jmp short b
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a:
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db "MSVIDEO: "
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db msg
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db 13,10,0
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b:
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endm
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else ; DEBUG
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DebugErr macro flags,msg
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endm
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endif ; DEBUG
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;--------------------------------------------------------------------------
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; Define the return address as a type using the DefD macro in order to
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; be able to pass it as a parameter to the LogParamError function.
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ReturnAddr equ (dword ptr [bp+2])
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DefD ReturnAddr
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;--------------------------------------------------------------------------
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NSTYPE equ 00007h ; Segment type mask
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NSCODE equ 00000h ; Code segment
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NSDATA equ 00001h ; Data segment
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NSITER equ 00008h ; Iterated segment flag
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NSMOVE equ 00010h ; Movable segment flag
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NSPURE equ 00020h ; Pure segment flag
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NSPRELOAD equ 00040h ; Preload segment flag
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NSRELOC equ 00100h ; Segment has relocations
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NSDEBUG equ 00200h ; Segment has debug info
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NSDPL equ 00C00h ; 286 DPL bits
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NSDISCARD equ 01000h ; Discard bit for segment
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CODEINFO struc
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ns_sector dw ? ; File sector of start of segment
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ns_cbseg dw ? ; Number of bytes in file
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ns_flags dw ? ; Attribute flags
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ns_minalloc dw ? ; Minimum allocation in bytes
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ns_handle dw ? ; handle to object
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ns_align dw ? ; file alignment
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CODEINFO ends
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DSC_CODE_BIT equ 08h
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;--------------------------------------------------------------------------
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externA __AHINCR
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externA __WINFLAGS
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externFP LogParamError ;(WORD wError, FARPROC lpfn, DWORD dValue);
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externFP IsWindow ;(HWND hwnd);
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externFP GetCodeInfo ;(FARPROC lpfnProc, LPVOID lpSegInfo);
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externFP GetCurrentTask ;(void);
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externFP IsTask ;(HANDLE hTask);
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; Windows internal pointer validation tools.
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externFP IsBadReadPtr ;(LPVOID lp, WORD cb);
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externFP IsBadWritePtr ;(LPVOID lp, WORD cb);
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externFP IsBadHugeReadPtr ;(LPVOID lp, DWORD cb);
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externFP IsBadHugeWritePtr ;(LPVOID lp, DWORD cb);
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externFP IsBadCodePtr ;(FARPROC lp);
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externFP IsBadStringPtr ;(LPSTR lpsz, WORD wMaxLen);
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externFP IsSharedSelector ;(WORD wSelector);
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;--------------------------------------------------------------------------
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sBegin Data
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sEnd Data
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;--------------------------------------------------------------------------
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;;;createSeg _TEXT, CodeRes, word, public, CODE
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;;;createSeg FIX, CodeFix, word, public, CODE
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createSeg MSVIDEO, CodeRes, word, public, CODE
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sBegin CodeRes
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assumes cs, CodeRes
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assumes ds, Data
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;--------------------------------------------------------------------------
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; @doc INTERNAL
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;
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; @func BOOL | ValidateReadPointer | validates that a pointer is valid to
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; read from.
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;
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; @parm LPVOID | lpPoint| pointer to validate
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; @parm DWORD | dLen | supposed length of said pointer
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;
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; @rdesc Returns TRUE if <p> is a valid pointer
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; Returns FALSE if <p> is not a valid pointer
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;
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; @comm will generate error if the pointer is invalid
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;
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cProc ValidateReadPointer, <FAR, PUBLIC, PASCAL> <>
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parmD lpPoint
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parmD dLen
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cBegin
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cCall IsBadHugeReadPtr, <lpPoint, dLen>
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or ax,ax
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jz ValidateReadPointer_Exit ; Return TRUE
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cCall LogParamError, <ERR_BAD_PTR, ReturnAddr, lpPoint>
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mov ax,-1 ; Return FALSE
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ValidateReadPointer_Exit:
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not ax
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cEnd
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;--------------------------------------------------------------------------
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; @doc INTERNAL
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;
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; @func BOOL | ValidateWritePointer | validates that a pointer is valid to
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; write to.
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;
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; @parm LPVOID | lpPoint| pointer to validate
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; @parm DWORD | dLen | supposed length of said pointer
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;
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; @rdesc Returns TRUE if <p> is a valid pointer
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; Returns FALSE if <p> is not a valid pointer
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;
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; @comm will generate error if the pointer is invalid
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;
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cProc ValidateWritePointer, <FAR, PUBLIC, PASCAL> <>
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parmD lpPoint
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parmD dLen
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cBegin
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cCall IsBadHugeWritePtr, <lpPoint, dLen>
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or ax,ax ; If not fail,
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jz ValidateWritePointer_Exit ; Return TRUE
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cCall LogParamError, <ERR_BAD_PTR, ReturnAddr, lpPoint>
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mov ax,-1 ; Return FALSE
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ValidateWritePointer_Exit:
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not ax
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cEnd
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;--------------------------------------------------------------------------
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; @doc INTERNAL
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;
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; @func WORD | ValidDriverCallback |
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;
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; validates that a driver callback is valid, to be valid a driver
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; callback must be a valid window, task, or a function in a FIXED DLL
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; code segment.
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;
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; @parm DWORD | dwCallback | callback to validate
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; @parm WORD | wFlags | driver callback flags
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;
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; @rdesc Returns 0 if <dwCallback> is a valid callback
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; Returns error condition if <dwCallback> is not a valid callback
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;
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cProc ValidDriverCallback, <NEAR, PASCAL> <>
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parmD dCallback
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parmW wFlags
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localV ci, %(SIZE CODEINFO)
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cBegin
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mov ax, wFlags ; switch on callback type
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and ax, DCB_TYPEMASK
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errnz <DCB_NULL>
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jnz ValidDriverCallback_Window ; case DCB_NULL
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jmp ValidDriverCallback_Exit ; return zero for success
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ValidDriverCallback_Window:
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dec ax
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errnz <DCB_WINDOW - 1>
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jnz ValidDriverCallback_Task ; case DCB_WINDOW
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cmp dCallback.hi, 0 ; HIWORD must be NULL
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jnz ValidDriverCallback_BadWindow ; Set error
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push dCallback.lo ; Check for valid HWND
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cCall IsWindow, <>
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or ax, ax ; If HWND,
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jnz ValidDriverCallback_Success ; Set successful return
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ValidDriverCallback_BadWindow: ; Else set error return
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mov ax, ERR_BAD_HWND
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jmp ValidDriverCallback_Exit ; Return error
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ValidDriverCallback_Task:
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dec ax
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errnz <DCB_TASK - 2>
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jnz ValidDriverCallback_Function ; case DCB_TASK
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cmp dCallback.hi, 0 ; HIWORD must be NULL
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jnz ValidDriverCallback_BadTask ; Set error
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push dCallback.lo ; Check for valid Task
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cCall IsTask, <>
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or ax, ax ; If Task,
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jnz ValidDriverCallback_Success ; Set successful return
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ValidDriverCallback_BadTask: ; Else set error return
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mov ax, ERR_BAD_HANDLE
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jmp ValidDriverCallback_Exit ; Return error
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ValidDriverCallback_Function:
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dec ax
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errnz <DCB_FUNCTION - 3> ; case DCB_FUNCTION
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jnz ValidDriverCallback_Default
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lea ax, ci
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cCall GetCodeInfo, <dCallback, ss, ax>
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or ax, ax
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jz ValidDriverCallback_BadFunction ; Set error return
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mov ax, ci.ns_flags ; Check for valid flags
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and ax, NSDATA or NSMOVE or NSDISCARD
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jz ValidDriverCallback_Exit ; Return zero for success
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jnz ValidDriverCallback_BadFunction
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ValidDriverCallback_Default:
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mov ax, ERR_BAD_FLAGS ; default to error condition
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jmp ValidDriverCallback_Exit
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ValidDriverCallback_Success:
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xor ax, ax
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ValidDriverCallback_Exit:
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cEnd
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ValidDriverCallback_BadFunction: ; Else set error return
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DebugErr DBF_ERROR, "Driver callbacks MUST be in a FIXED segment of a DLL."
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mov ax, ERR_BAD_FUNC_PTR
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jmp ValidDriverCallback_Exit ; Return error
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;--------------------------------------------------------------------------
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; @doc INTERNAL
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;
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; @func BOOL | ValidateDriverCallback |
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;
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; validates that a driver callback is valid, to be valid a driver
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; callback must be a valid window, task, or a function in a FIXED DLL
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; code segment.
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;
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; @parm DWORD | dwCallback | callback to validate
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; @parm WORD | wFlags | driver callback flags
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;
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; @rdesc Returns TRUE if <dwCallback> is a valid callback
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; Returns FALSE if <dwCallback> is not a valid callback
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;
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; @comm will generate error if the callback is invalid
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;
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cProc ValidateDriverCallback, <FAR, PUBLIC, PASCAL> <>
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parmD dCallback
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parmW wFlags
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cBegin
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cCall ValidDriverCallback, <dCallback, wFlags>
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or ax, ax ; If no error return
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jz ValidateDriverCallback_Exit ; Return TRUE
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cCall LogParamError, <ax, ReturnAddr, dCallback>
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mov ax, -1 ; Return FALSE
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ValidateDriverCallback_Exit:
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not ax
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cEnd
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;--------------------------------------------------------------------------
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|
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; @doc INTERNAL
|
||
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;
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|
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; @func BOOL | ValidateCallback |
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;
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; validates that a callback is valid.
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;
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; @parm FARPROC | dCallback | callback to validate
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;
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; @rdesc Returns TRUE if <lpfnCallback> is a valid callback
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; Returns FALSE if <lpfnCallback> is not a valid callback
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;
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; @comm will generate error if the callback is invalid
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;
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cProc ValidateCallback, <FAR, PUBLIC, PASCAL> <>
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|
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parmD dCallback
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cBegin
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cCall IsBadCodePtr, <dCallback>
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or ax,ax ; If not fail,
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|
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jz ValidateCallback_Exit ; Return TRUE
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cCall LogParamError, <ERR_BAD_FUNC_PTR, ReturnAddr, dCallback>
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mov ax, -1 ; Return FALSE
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|
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ValidateCallback_Exit:
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not ax
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cEnd
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|
||
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;--------------------------------------------------------------------------
|
||
|
|
; @doc INTERNAL
|
||
|
|
;
|
||
|
|
; @func BOOL | ValidateString | Validates taht a string is valid
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||
|
|
;
|
||
|
|
;
|
||
|
|
; validates that a callback is valid.
|
||
|
|
cProc ValidateString, <FAR, PUBLIC, PASCAL> <>
|
||
|
|
parmD lsz
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||
|
|
parmW max_len
|
||
|
|
cBegin
|
||
|
|
cCall IsBadStringPtr, <lsz, max_len> ; Maximum length
|
||
|
|
or ax,ax ; If not fail,
|
||
|
|
jz ValidateString_Exit ; Return TRUE
|
||
|
|
cCall LogParamError, <ERR_BAD_STRING_PTR, ReturnAddr, lsz>
|
||
|
|
mov ax, -1 ; Return FALSE
|
||
|
|
ValidateString_Exit:
|
||
|
|
not ax
|
||
|
|
cEnd
|
||
|
|
|
||
|
|
sEnd
|
||
|
|
|
||
|
|
end
|