X86-assembly/Instructions/lea

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X86-assembly

Instructions

lea

Description

The lea (load effective address) instruction is used to put a memory address into the destination.

Syntax

lea destination, source

Examples

lea eax, [ebx+8] Put [ebx+8] into EAX. After this instruction, EAX will equal 0x00403A48. Note In contrast, the instruction mov eax, [ebx+8] will make EAX equal to 0x0012C140

+------------------+ +------------+ | Registers | | Memory | +------------------+ +------------+ | EAX = 0x00000000 | 0x00403A40 | 0x7C81776F | | EBX = 0x00403A40 | 0x00403A44 | 0x7C911000 | +------------------+ 0x00403A48 | 0x0012C140 | 0x00403A4C | 0x7FFDB000 | +------------+