这类Directives主要用于stack unwinding和exception handling,简单来说就是现代编译器在生成的Prologue中,不一定使用%rbp来专门用来作为栈底指针寄存器,它有可能作为通用寄存器来使用,如果显式的通过指定-fomit-frame-pointer这个编译选项,就可以看到生成的Assembly code中没有类似push %rbp这样的压栈语句,取而代之的是CFI...
x86-64架构包括16个64位通用寄存器，如%rbx、%rbp、%r12-%r15等。这些寄存器有调用者保存和被调用者保存的概念。早期的x86架构扩展到16位、32位、64位，每个寄存器内部结构具有多用途。例如，%rax的低8位是8位寄存器%al，相邻8位是%ah，低16位是%ax，以此类推。除了通用寄存器，还有名为SSE的扩展...
In this project you will write programs in x86-64 assembly language. It is important that you learnthe x86-64 assembly language since it is the one you use every day in your PC, Mac, or indata.cs.purdue.edu. Also, this is a 64 bit architecture that uses 8 byte addresses and ariabl...
<!-- flowchart 箭头图标 勿删 --> 深入浅出GNU X86-64 汇编 本文是我翻译自 Introduction to X86-64 Assembly for Compiler Writers. 因为之前在学校学的X86汇编都是32位的,而现在的PC机处理器基本都是64
Exercism exercises in x86-64 Assembly. NASM NASM (The Netwide Assembler) is the assembler used by this track. It's a popular assembler with a syntax that is simple and easy to understand. Unity Unity is a simple unit testing framework for C used by this track. Using a framework written ...
Gentle Introduction to x86-64 Assembly Introduction This document is meant to summarise differences between x86-64 and i386 assembly assuming that you already know well the i386 gas syntax. I will try to keep this document up to date until official documentation is available. ...
同样,我们可以在System V AMD64 ABI中读取,前六个函数参数在寄存器中传递。他们是: Here we can see that after application runnning, rax is equal to 1. Then we call a function incRax, which increases rax value to 1, and now rax value must be 2. After this execution continues from 8 line...
这是Say hello to x86_64 Assembly的第八部分,也是最后一部分,下面我们将介绍如何在汇编程序中使用非整数。使用浮点数据有两种方法: It is eight and final part of Say hello to x86_64 Assembly and here we will take a look on how to work with non-integer numbers in assembler. There are a couple...
系统调用原理:Guide to x86 Assembly 5.s ;nasm -f elf64 5.s && ld 5.o -o 5 && ./5 section .text global _start _start: mov rdi, 1 ;arg0 rdi传递第一个参数给函数,是函数句柄,表示stdout。 mov rdx, 8 ;arg2 rdx传递第三个参数给函数,表示字符串大小,这里是8个字符。