GetAsmSize - EurekaLog Documentation

Returns size of a single machine opcode.

Unit

EDisAsm

Syntax

Code (Delphi)

function GetAsmSize(

const AStart: Pointer;

var ASize: Byte

): Boolean;

Parameters

AStart

A pointer to code.

ASize

(out) A size of instruction at AStart (in bytes).

Return value

True if operation was successful. False - otherwise.

Exceptions

System.SysUtils.EAccessViolation

Invalid pointer or invalid code.

Remarks

GetAsmSize tries to determinate size of one machine instruction in bytes.

This function is used as base of GetFunctionSize. It's also used in hooks and disassembler-related code.

Note

If AStart points to JMP-stub, GetAsmSize will return size of the stub, not the size of first function instruction.

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Function GetAsmSize