27 lines
817 B
NASM
27 lines
817 B
NASM
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bits 64
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SECTION .data
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var1: dd 0x00112233
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var2: dd 0x55667788
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SECTION .text
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global _start
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_start:
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%include "header.asm.inc"
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; interactions between memory and registers
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mov eax, [var1] ; store content at address `var1` in eax
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mov eax, var1 ; store address `var1` in eax
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mov [var1], eax ; store eax at address `var1`
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;mov var1, eax ; invalid!
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; many more instructions allow to work on operands
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add eax, [var1] ; add value at address `var1` to eax
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add [var1], dword 0x42 ; store immediate value at address `var1`
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; some combinations are invalid, e.g., two memory operands in arithmetic ops
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; (but many others, too!)
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; add [var1], [var2] ; invalid!
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%include "sysexit.asm.inc"
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