214 lines
5.4 KiB
ArmAsm
214 lines
5.4 KiB
ArmAsm
// TITLE("Debug Support Functions")
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//++
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//
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// Copyright (c) 1990 Microsoft Corporation
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//
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// Module Name:
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//
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// debug.s
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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. Each
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// function executes a specific call pal which is interpreted by the
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// kernel debugger.
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//
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// Author:
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//
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// Steven R. Wood (stevewo) 3-Aug-1989
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// Joe Notarangelo 24-Jun-1992
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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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// Revision History:
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//
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//--
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#include "ksalpha.h"
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//++
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//
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// VOID
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// DbgBreakPoint()
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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)
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BREAK_DEBUG_STOP // debug stop breakpoint
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ret zero, (ra) // return
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.end DbgBreakPoint
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// VOID DbgBreakPointWithStatus(IN ULONG Status)
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// Routine Description:
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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" requirement.
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//
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// Arguments:
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// A status code.
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// Return Value:
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// None.
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LEAF_ENTRY(DbgBreakPointWithStatus)
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ldil v0, DEBUG_STOP_BREAKPOINT // first half of macro.
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ALTERNATE_ENTRY(RtlpBreakWithStatusInstruction)
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call_pal callkd // second half of macro.
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ret zero, (ra) // return
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.end DbgBreakPointWithStatus
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// VOID DbgUserBreakPoint()
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// Routine Description:
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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 debug will ignore
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// this breakpoint since it will not find the instruction address in its
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// breakpoint table.
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// Arguments:
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// None.
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// Return Value:
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// None.
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LEAF_ENTRY(DbgUserBreakPoint)
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BREAK // issue user breakpoint
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ret zero, (ra) // return
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.end DbgUserBreakPoint
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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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// )
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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 (a0) - Supplies a pointer to the output string descriptor.
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//
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// Return Value:
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//
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// Status code. STATUS_SUCCESS if debug print happened.
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// STATUS_BREAKPOINT if user typed a Control-C during print.
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// STATUS_DEVICE_NOT_CONNECTED if kernel debugger not present.
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//
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//--
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#if DEVL
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LEAF_ENTRY(DebugPrint)
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ldwu a1, StrLength(a0) // set length of output string
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LDP a0, StrBuffer(a0) // set address of output string
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BREAK_DEBUG_PRINT // execute a debug print breakpoint
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ret zero, (ra) // return
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.end DebugPrint
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#endif
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// ULONG DebugPrompt(IN PSTRING Output, IN PSTRING Input)
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// Routine Description:
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// This function executes a debug prompt breakpoint.
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// Arguments:
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// Output (a0) - Supplies a pointer to the output string descriptor.
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// Input (a1) - Supplies a pointer to the input string descriptor.
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// Return Value:
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// The length of the input string is returned as the function value.
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#if DEVL
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LEAF_ENTRY(DebugPrompt)
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ldwu a3,StrMaximumLength(a1) // set maximum length of input string
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LDP a2,StrBuffer(a1) // set address of input string
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ldwu a1,StrLength(a0) // set length of output string
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LDP a0,StrBuffer(a0) // set address of output string
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BREAK_DEBUG_PROMPT
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ret zero, (ra)
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.end DebugPrompt
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#endif
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// VOID DebugLoadImageSymbols(IN PSTRING ImagePathName, IN PKD_SYMBOLS_INFO SymbolInfo)
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// Routine Description:
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//
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// This function calls the kernel debugger to load the symbol
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// table for the specified image.
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//
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// Arguments:
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// ImagePathName - specifies the fully qualified path name of the image
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// file that has been loaded into an NT address space.
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//
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// SymbolInfo - information captured from header of image file.
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// Return Value:
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// None.
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#if DEVL
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LEAF_ENTRY(DebugLoadImageSymbols)
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BREAK_DEBUG_LOAD_SYMBOLS
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ret zero, (ra)
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.end DebugLoadImageSymbols
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#endif
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// VOID DebugUnLoadImageSymbols(IN PSTRING ImagePathName, IN PKD_SYMBOLS_INFO SymbolInfo)
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// Routine Description:
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// This function calls the kernel debugger to unload the symbol table for the specified image.
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// Arguments:
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// ImagePathName - specifies the fully qualified path name of the image
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// file that has been unloaded from an NT address space.
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//
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// SymbolInfo - information captured from header of image file.
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// Return Value:
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// None.
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#if DEVL
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LEAF_ENTRY(DebugUnLoadImageSymbols)
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BREAK_DEBUG_UNLOAD_SYMBOLS
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ret zero, (ra)
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.end DebugUnLoadImageSymbols
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#endif
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