PS:http://stackoverflow.com/questions/16557677/difference-between-data-section-and-the-bss-section-in-c The .bss section is guaranteed to be all zeros when the program is loaded into memory. So any global data that is uninitialized, or initialized to…
转载自http://processors.wiki.ti.com/index.php/Linker_Special_Section_Types#NOLOAD_Sections_2 Introduction The linker allows you to create different kinds of sections called NOLOAD, DSECT, and COPY sections. How can you create these sections, and what ar…
Common Sections The .text section is where all general-purpose code emitted by the compiler or assembler ends up. Since PE files run in 32-bit mode and aren't restricted to 16-bit segments, there's no reason to break the code from separate source fil…
6.1 GNU C 的扩展关键字:attribute GNU C 增加一个 __atttribute__ 关键字用来声明一个函数.变量或类型的特殊属性.声明这个特殊属性有什么用呢?主要用途就是指导编译器在编译程序时进行特定方面的优化或代码检查.比如,我们可以通过使用属性声明指定某个变量的数据边界对齐方式. __atttribute__ 的使用非常简单,当我们定义一个函数.变量或类型时,直接在它们名字旁边添加下面的属性声明即可: __atttribute__((ATTRIBUTE)) 这里需要注意…
理解ELF的BSS section, 可以概括为: Uninitialized global/static data "Block Started by Symbol" "Better Save Space" Has section header but occupies no space CSAPP一书对bss的描述如下: .bss: 未被初始化的全局的C变量.这一节在o文件中不占实际的空间,只是一个place holder.o文件格式之所以区分初始化的变量和未被…
1 Intro The smallest unit of an object file is a section. A section is a block of code or data that occupies contiguous space in the memory map. .text section contains executable code .data section usually contains initialized data .bss section usual…
This document is the user manual for the Yasm assembler. It is intended as both an introduction and a general-purpose reference for all Yasm users. 1. Introduction Yasm is a BSD-licensed assembler that is designed from the ground up to allow for mult…