linker and loader

1. Address relocation: The linkerProgramTo bind and assign the corresponding address, the loader completes the final relocation step and assigns the actual address 2. From the original article: With the emergence of hardware relocation and virtual memory, every program can have the whole address space again, soThe connectors and loaders become less complex. Because hardware (rather than software) can be relocated during any loadingThe program can

excerpted from http://blog.csdn.net/zzxian/article/details/16820035c compiler, linker, loader detailed overview C language Compiler link process to convert a C program we write (source code) to a program that can run on hardware (executable code), need to compile and link. Compiling is the process of translating text form source code into a target file in the form of machine language. A link is the

. s file. The GCC command used is gcc-S, which corresponds to the compiling command CC-s; Assembler: converts a. s file to a. o file. The GCC command used is gcc-C, which corresponds to the as command; Linker: converts a. o file into an executable program. The GCC command used is GCC, which corresponds to the LD command; Loader: Load executable programs into memory and execute,

us: 0x080482e8-0x80482db = 0xd. In this way, the final executable program is generated after the relocation. After the executable program is generated, the next step is to load it into the memory for running. In Linux, the compiler (C Language) is, the assembler is as, and the linker is lD, but there is no actual program corresponding to the loader concept. In fact, the function of loading executable progr

LD. So(8) LD. So (8) NameLD. Also/ld-linux.so-dynamic linker/loader DescriptionLD. So loads the shared libraries needed by a program, prepares the pro ‐Gram to run, and then runs it. Unless explicitly specified via-Static option to LD during compilation, all Linux programs are incom ‐Plete and require further linking at run time. The necessary shared libraries needed by the program are searchedIn the f

I recently read the book linker loader and sorted out some of my doubts. 1. Differences between compilers and compilers: there is no relationship between the two Compiler: generate an intermediate source file (such as C)Code, Assembly or machine code. Assembler: generate the machine code from the source code of the assembly language. However, there is a synergy between the compiler and the assemb

Most computers use a 8-bit block (known as Byte byte) as the smallest addressable memory unit, rather than accessing individual bits in memory. The program treats the memory as a very large byte array called the virtual memory (virtural memories). Each byte of the memory is marked by a unique number, called its address, and the set of all possible addresses is called the virtual address space.This virtual address space is just a conceptual image, and the actual implementation is shown in chapter

This digest from: self-cultivation of programmers-linking, loading and libraryThe format of the destination file and the executable file is similar, and the contents of the dynamic-link library and the static-link library are very similar to the

First of all, why do I have to read this chapter? This semester open OS class, in Morden Operating system read the content and process related to see such a sentence: "Process is fundamentally a container that holds all the infor Mation needed to run a program. " At that moment, I thought of the ambiguous "target executable" that I had seen before in Csapp, so I read it again in the 7th chapter. To understand the role of linker, the first thing

This is a creation in Article, where the information may have evolved or changed. This article by Bole Online-yhx translation, Huang Li-min school draft. without permission, no reprint! English Source: Sergey Matyukevich. Welcome to join the translation team. Go Language Insider (1): Key concepts and project structure The Go Language Insider (2): Go deep down compiler This article will discuss the content related to the GO linker, the obj

This is because your settings are incorrect. The solution is as follows:Solution 1: Project-> properties-> linker-> enable incremental Link under general, change "Yes (/Incremental)" to "no (/Incremental: No) ".However, this introduces another warning: formatcom. OBJ: Warning lnk4075: Ignore "/editandcontinue" (due to the "/Incremental: No" Specification)Select a project, Properties> Configuration Properties> C/C ++, and change "debug information form

implemented, of course, this knowledge is a small problem, that is, the absence of the corresponding. dll file, add in can be executed (why compile no problem, and run a problem. There are answers later). But as a programmer, need to have a problem, know it, we must know why (I am the opposite is the case, perhaps some programmers are very opposed to this view, because their point of view is as long as the use of the line), and then on a variety of Baidu, turn the book, the following personal i

brought up in the review. First, the compiler and the loader must be simplified. Plan 9 runs on a variety of processors, and these compilations are usually done in parallel. Unfortunately, all compilations must be completed before the load is made. The load is single-threaded. In this model, any changes to the compiled results for loading will significantly increase the actual time. The same is true for libraries that are often compiled and loaded. I

What is loader, the official explanation for the file preprocessor, popular Point said Webpack in the processing of static resources, the need to load a variety of loader, such as HTML files, to use Html-loader, CSS files to use Css-loader, Style-loader and so on.Official Re

by it. The "Dt_rpath" entries is ignored if "Dt_runpath" entries exist.7. The default directories, Normally/lib and/usr/lib.8. For a native linker on an ELF system, if the file/etc/ld.so.conf exists, the list of directories found in the. file.If the required shared library is not found, the linker would issue a warning and continue with the link.As you can see, the lookup path specified by-rpath-link is on

The end product of a class's load is a class object in the heap (heap) class objects encapsulate the data structures in the method area and provide Java programmers with an interface to access data structures within the method area. And reflection is like a mirror. This interface is a reflection interface, so we can get the methods and properties of the class, including private methods and properties, by reflection. Let's introduce the class loader in

base directory. Full class name namespace Prefixes File base directory file path \acme\log\writer\file_writer Acme\log\writer ./acme-log-writer/lib/ ./acme-log-writer/lib/file_writer.php \aura\web\response\status Aura\web /path/to/aura-web/src/ /path/to/aura-web/src/response/status.php \symfony\core\request Symfony\core ./vendor/symfony/core/ ./vendor/symfony/core/request.php \zend

Two pages are recommended first:http://blog.csdn.net/muyuyuzhong/article/details/7755291Http://www.cnblogs.com/liulipeng/archive/2013/10/14/3368938.htmlThe core section of the link script is defined as follows:1 SECTIONS { 2 ... 3 secname start BLOCK (align) (NOLOAD): at (LDADR) 4 {contents} >region:p HDR = fill 5 ... 6 } Secname defines the segment name.Start specifies the run address.Block (align) specifies the alignment of blocks. For examp

1. Symbol classification(1) Global symbols: Non-static global variables, non-static functions(2) External symbols: global variables and functions that are defined in other modules and referenced by this module(3) Local symbols: Static variables (both global and local), static functionsFor static local variables, the compiler generates a unique name for it. such as X.fun1,x.fun2. Local symbols are not visible to the linker.2. Symbolic resolutionwhen th

This articleArticleIs from 《Inside Java Virtual Machine (Deep into Java Virtual Machine) This book excerpt, in the face of this chapter mainly talks about the Java class loader architecture, speak quite well. In Java's sandbox, the Class Loader architecture is the first line of defense. it is the class loader, after all, that brings code into the Java Virtual M