252 lines
5.9 KiB
NASM
252 lines
5.9 KiB
NASM
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title "Debug Support Functions"
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;++
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;
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; Copyright (c) 2000 Microsoft Corporation
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;
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; Module Name:
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;
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; debugstb.asm
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;
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; Abstract:
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;
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; This module implements functions to support debugging NT.
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;
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; Author:
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;
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; David N. Cutler (davec) 26-Jun-2000
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;
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; Environment:
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;
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; Any mode.
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;
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;--
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include ksamd64.inc
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subttl "Break Point"
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;++
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;
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; VOID
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; DbgBreakPoint (
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; VOID
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; )
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;
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; Routine Description:
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;
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; This function executes a breakpoint instruction. Useful for entering
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; the debugger under program control. This breakpoint will always go to
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; the kernel debugger if one is installed, otherwise it will go to the
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; debug subsystem.
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;
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; Arguments:
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;
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; None.
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;
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; Return Value:
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;
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; None.
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;
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;--
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LEAF_ENTRY DbgBreakPoint, _TEXT$00
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int 3 ; break into debugger
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ret ; return
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LEAF_END DbgBreakPoint, _TEXT$00
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subttl "User Break Point"
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;++
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;
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; VOID
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; DbgUserBreakPoint()
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;
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; Routine Description:
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;
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; This function executes a breakpoint instruction. Useful for entering
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; the debug subsystem under program control. The kernel debugger will
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; ignore this breakpoint since it will not find the instruction address
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; its breakpoint table.
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;
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; Arguments:
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;
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; None.
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;
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; Return Value:
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;
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; None.
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;
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;--
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LEAF_ENTRY DbgUserBreakPoint, _TEXT$00
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int 3 ; break into debugger
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ret ; return
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LEAF_END DbgUserBreakPoint, _TEXT$00
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subttl "Break Point With Status"
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;++
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;
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; VOID
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; DbgBreakPointWithStatus(
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; IN ULONG Status
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; )
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;
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; Routine Description:
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;
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; This function executes a breakpoint instruction. Useful for entering
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; the debugger under program control. This breakpoint will always go to
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; the kernel debugger if one is installed, otherwise it will go to the
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; debug subsystem. This function is identical to DbgBreakPoint, except
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; that it takes an argument which the debugger can see.
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;
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; Note: The debugger checks the address of the breakpoint instruction
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; against the address RtlpBreakWithStatusInstruction. If it matches,
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; we have a breakpoint with status. A breakpoint is normally issued
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; with the break_debug_stop macro which generates two instructions.
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; We can't use the macro here because of the "label on the breakpoint"
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; requirement.
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;
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; Arguments:
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;
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; Status (ecx) - Supplies the break point status code.
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;
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; Return Value:
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;
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; None.
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;
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;--
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altentry RtlpBreakWithStatusInstruction
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LEAF_ENTRY DbgBreakPointWithStatus, _TEXT$00
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ALTERNATE_ENTRY RtlpBreakWithStatusInstruction
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int 3 ; break into debugger
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ret ; return
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LEAF_END DbgBreakPointWithStatus, _TEXT$00
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subttl "Debug Print"
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;++
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;
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; NTSTATUS
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; DebugPrint(
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; IN PSTRING Output,
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; IN ULONG ComponentId,
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; IN ULONG Level
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; )
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;
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; Routine Description:
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;
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; This function executes a debug print breakpoint.
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;
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; Arguments:
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;
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; Output (rcx) - Supplies a pointer to the output string descriptor.
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;
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; ComponentId (edx) - Supplies the Id of the calling component.
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;
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; Level (r8d) - Supplies the output importance level.
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;
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; Return Value:
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;
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; STATUS_SUCCESS is returned if the debug print was completed successfully.
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;
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; STATUS_BREAKPOINT is returned if user typed a Control-C during print.
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;
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; STATUS_DEVICE_NOT_CONNECTED is returned if kernel debugger not present.
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;
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;--
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LEAF_ENTRY DebugPrint, _TEXT$00
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mov r9d, r8d ; set importance level
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mov r8d, edx ; set component id
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mov dx, StrLength[rcx] ; set length of output string
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mov rcx, StrBuffer[rcx] ; set address of output string
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mov eax, BREAKPOINT_PRINT ; set debug service type
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int 2dh ; call debug service
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int 3 ; required - do not remove
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ret ; return
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LEAF_END DebugPrint, _TEXT$00
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subttl "Debug Prompt"
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;++
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;
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; ULONG
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; DebugPrompt(
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; IN PSTRING Output,
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; IN PSTRING Input
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; )
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;
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; Routine Description:
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;
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; This function executes a debug prompt breakpoint.
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;
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; Arguments:
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;
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; Output (rcx) - Supplies a pointer to the output string descriptor.
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;
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; Input (rdx) - Supplies a pointer to the input string descriptor.
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;
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; Return Value:
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;
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; The length of the input string is returned as the function value.
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;
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;--
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LEAF_ENTRY DebugPrompt, _TEXT$00
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mov r9w, StrMaximumLength[rdx] ; set maximum length of input string
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mov r8, StrBuffer[rdx] ; set address of input string
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mov dx, StrLength[rcx] ; set length of output string
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mov rcx, StrBuffer[rcx] ; set address of output string
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mov eax, BREAKPOINT_PROMPT ; set debug service type
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int 2dh ; call debug service
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int 3 ; required - do not remove
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ret ; return
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LEAF_END DebugPrompt, _TEXT$00
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;++
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;
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; VOID
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; DebugService2(
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; IN PVOID Param1,
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; IN PVOID Param2,
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; IN ULONG Service
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; )
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;
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; Routine Description:
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;
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; This function calls the kernel debugger to execute a command string.
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;
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; Arguments:
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;
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; Param1 (rcx) - Supplies the first parameter to the KD fault handler
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;
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; Param2 (rdx) - Supplies the second parameter to the KD fault handler
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;
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; Service (r8d) - Supplies a pointer to the command string.
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;
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; Return Value:
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;
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; None.
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;
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;--
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LEAF_ENTRY DebugService2, _TEXT$00
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mov eax, r8d ; set debug service type
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int 2dh ; call debug service
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int 3 ; required - do not remove
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ret ; return
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LEAF_END DebugService2, _TEXT$00
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end
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