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.effmach (Effective Machine)

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The .effmach command displays or changes the processor mode that the debugger uses.

.effmach [MachineType]

Parameters

MachineType
Specifies the processor type that the debugger uses for this session. If you omit this parameter, the debugger displays the current machine type.

You can enter one of the following machine types.

Machine type

Description

.

Use the processor mode of the target computer's native processor mode.

#

Use the processor mode of the code that is executing for the most recent event.

x86

Use an x86-based processor mode.

amd64

Use an x64-based processor mode.

ebc

Use an EFI byte code processor mode.

arm

Use an Arm64 processor mode.

chpe

Use a CHPE processor mode.

Environment

Item Description
Modes User mode, kernel mode
Targets Live, crash dump
Platforms All

Remarks

The processor mode influences many debugger features:

  • Which processor is used for stack tracing.

  • Whether the process uses 32-bit or 64-bit pointers.

  • Which processor's register set is active.