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Diffstat (limited to 'private/ntos/ex/i386/raisests.asm')
| -rw-r--r-- | private/ntos/ex/i386/raisests.asm | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/private/ntos/ex/i386/raisests.asm b/private/ntos/ex/i386/raisests.asm new file mode 100644 index 000000000..9a9688b1b --- /dev/null +++ b/private/ntos/ex/i386/raisests.asm @@ -0,0 +1,316 @@ + title "Raise Exception" +;++ +; +; Copyright (c) 1990 Microsoft Corporation +; +; Module Name: +; +; raisests.asm +; +; Abstract: +; +; This module implements the function to raise a software exception. +; +; Author: +; +; Bryan Willman 11 Nov 90 +; +; Environment: +; +; Any mode. +; +; Revision History: +; +;-- +.386p + .xlist +include ks386.inc +include callconv.inc ; calling convention macros + .list + + EXTRNP _RtlDispatchException,2 + EXTRNP _ZwContinue,2 + EXTRNP _ZwRaiseException,3 + +_TEXT$01 SEGMENT DWORD PUBLIC 'CODE' + ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING + +; +; Context flags definition. +; + +CONTEXT_SETTING EQU CONTEXT_INTEGER OR CONTEXT_CONTROL OR CONTEXT_SEGMENTS + +; +; Exception record length definition. +; + +EXCEPTION_RECORD_LENGTH EQU (ErExceptionInformation + 16) AND 0fffffff0H + + page + subttl "Raise Software Exception" +;++ +; +; VOID +; ExRaiseException ( +; IN PEXCEPTION_RECORD ExceptionRecord +; ) +; +; Routine Description: +; +; This function raises a software exception by building a context record, +; establishing the stack limits of the current processor mode, and calling +; the exception dispatcher. If the exception dispatcher finds a handler +; to process the exception, then control is returned to the caller using +; the NtContinue system service. Otherwise the NtLastChance system service +; is called to provide default handing. +; +; N.B. On the 386, floating point state is not defined for non-fp +; exceptions. Therefore, this routine does not attempt to +; capture it. +; +; This means this routine cannot be used to report fp exceptions. +; +; Arguments: +; +; ExceptionRecord (ebp+8) - Supplies a pointer to an exception record. +; +; Return Value: +; +; None. +; +;-- + +cPublicProc _ExRaiseException , 1 + + push ebp + mov ebp,esp + pushfd ; save flags before sub + sub esp,ContextFrameLength ; Allocate a context record + +; +; Save regs we use in context record +; + + mov [(ebp-ContextFrameLength-4)+CsEax],eax + mov [(ebp-ContextFrameLength-4)+CsEcx],ecx + +; +; Get pointer to exception report record, and set the exceptionaddress +; field to be our return address +; + + mov eax,[ebp+8] ; (eax) -> ExceptionReportRecord + + mov ecx,[ebp+4] + mov [eax.ErExceptionAddress],ecx + +; +; Copy machine context into the context record +; + + lea eax,[ebp-ContextFrameLength-4] ; (eax) -> Context record + + mov [eax.CsEip],ecx + + mov [eax.CsEbx],ebx + mov [eax.CsEdx],edx + + mov [eax.CsEsi],esi + mov [eax.CsEdi],edi + + lea ecx,[ebp+8] + mov [eax.CsEsp],ecx + + mov ecx,[ebp] + mov [eax.CsEbp],ecx + + mov ecx,[ebp-4] + mov [eax.CsEflags],ecx + + mov dword ptr [eax.CsSegCs],cs + mov dword ptr [eax.CsSegDs],ds + mov dword ptr [eax.CsSegEs],es + mov dword ptr [eax.CsSegFs],fs + mov dword ptr [eax.CsSegGs],gs + mov dword ptr [eax.CsSegSs],ss + +; +; Set Context flags, note that FLOATING_POINT is NOT set. +; + + mov dword ptr [eax.CsContextFlags],CONTEXT_SETTING + +; +; _RtlDispatchException(ExceptionRecord, ContextRecord) +; + stdCall _RtlDispatchException, <[ebp+8],eax> +; +; If the exception is successfully dispatched, then continue execution. +; Otherwise, give the kernel debugger a chance to handle the exception. +; + lea ecx,[ebp-ContextFrameLength-4] ; (eax) -> Context record + + or eax, eax + jz short ere10 + + stdCall _ZwContinue, <ecx,0> + jmp short ere20 + +ere10: + stdCall _ZwRaiseException, <[ebp+8],ecx,0> + +ere20: +; +; Either the attempt to continue execution or the attempt to give +; the kernel debugger a chance to handle the exception failed. Raise +; a noncontinuable exception. +; + stdCall _ExRaiseStatus, <eax> + + +stdENDP _ExRaiseException + + page + subttl "Raise Software Exception" +;++ +; +; VOID +; ExRaiseStatus ( +; IN NTSTATUS Status +; ) +; +; Routine Description: +; +; This function raises a software exception with the specified status value +; by building a context record, establishing the stack limits of the current +; processor mode, and calling the exception dispatcher. If the exception +; dispatcher finds a handler to process the exception, then control is +; returned to the caller using the NtContinue system service. Otherwise +; the NtLastChance system service is called to provide default handing. +; +; N.B. On the 386, floating point state is not defined for non-fp +; exceptions. Therefore, this routine does not attempt to +; capture it. +; +; This means this routine cannot be used to report fp exceptions. +; +; Arguments: +; +; Status - Supplies the status value to be used as the exception code +; for the exception that is to be raised. +; +; Return Value: +; +; None. + +; Arguments: +; +;-- + +cPublicProc _ExRaiseStatus,1 + + push ebp + mov ebp,esp + pushfd ; save flags before sub + sub esp,ContextFrameLength+ExceptionRecordLength + +; +; Save regs we use in context record +; + + mov [(ebp-ContextFrameLength-4)+CsEax],eax + mov [(ebp-ContextFrameLength-4)+CsEcx],ecx + +; +; Copy machine context into the context record +; + + + lea eax,[ebp-ContextFrameLength-4] ; (eax) -> Context record + + mov ecx,[ebp+4] ; [ecx] = returned address + mov [eax.CsEip],ecx + + mov [eax.CsEbx],ebx + mov [eax.CsEdx],edx + + mov [eax.CsEsi],esi + mov [eax.CsEdi],edi + + lea ecx,[ebp+8] + mov [eax.CsEsp],ecx + + mov ecx,[ebp] + mov [eax.CsEbp],ecx + + mov ecx,[ebp-4] + mov [eax.CsEflags],ecx + + mov dword ptr [eax.CsSegCs],cs + mov dword ptr [eax.CsSegDs],ds + mov dword ptr [eax.CsSegEs],es + mov dword ptr [eax.CsSegFs],fs + mov dword ptr [eax.CsSegGs],gs + mov dword ptr [eax.CsSegSs],ss + +; +; Set Context flags, note that FLOATING_POINT is NOT set. +; + + mov dword ptr [eax.CsContextFlags],CONTEXT_SETTING + +; +; Get pointer to exception report record, and set the exceptionaddress +; field to be our return address +; + + lea eax,[ebp-ContextFrameLength-ExceptionRecordLength-4] + ; (eax) -> ExceptionRecord + mov ecx,[ebp+4] + mov dword ptr [eax.ErExceptionAddress],ecx + mov ecx,[ebp+8] + mov dword ptr [eax.ErExceptionCode],ecx + mov dword ptr [eax.ErNumberParameters], 0 + mov dword ptr [eax.ErExceptionRecord], 0 + mov dword ptr [eax.ErExceptionFlags], EXCEPTION_NONCONTINUABLE + +; +; _RtlDispatchException(ExceptionRecord, ContextRecord) +; + + lea ecx,[ebp-ContextFrameLength-4] ; (eax) -> Context record + +; ecx - Context record +; eax - Exception record + stdCall _RtlDispatchException, <eax, ecx> + +; +; An unwind was not initiated during the dispatching of a noncontinuable +; exception. Give the kernel debugger a chance to handle the exception. +; + +; +; _ZwRaiseException(ExceptionRecord, ContextRecord, FirstChance=TRUE) +; + + lea ecx,[ebp-ContextFrameLength-4] ; (eax) -> Context record + lea eax,[ebp-ContextFrameLength-ExceptionRecordLength-4] +; 1 - TRUE +; ecx - Context Record +; eax - Exception Report Record + stdCall _ZwRaiseException, <eax, ecx, 1> + +; +; We came back, suggesting some sort of error in the call. Raise +; a status exception to report this, return from ZwRaiseException is type. +; + + stdCall _ExRaiseStatus, <eax> + + +stdENDP _ExRaiseStatus + +_TEXT$01 ends + end + |