Figure 4-1. The general structure of a managed executable file in Visual Basic .NET

Generation PDF417 in Visual Basic .NET Figure 4-1. The general structure of a managed executable file

Figure 4-1. The general structure of a managed executable file
PDF417 Creator In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create PDF 417 image in .NET applications.
www.OnBarcode.com
Read PDF-417 2d Barcode In Visual Basic .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
CHAPTER 4 THE STRUCTURE OF A MANAGED EXECUTABLE FILE
EAN 128 Creator In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create GTIN - 128 image in Visual Studio .NET applications.
www.OnBarcode.com
Generate Matrix In VB.NET
Using Barcode maker for VS .NET Control to generate, create Matrix 2D Barcode image in .NET framework applications.
www.OnBarcode.com
Since ILAsm produces only PE files, this chapter concentrates on managed PE files executables, also known as image files because they can be thought of as memory images rather than pure COFF object files. (Actually, only one of the current managed compilers, Microsoft Visual C++, produces object files as an intermediate step to PE files.) This analysis of the managed PE file structure employs the following common definitions: File pointer: The location of an item within the file itself, before it is processed by the loader. This location is a position (an offset) within the file as it is stored on disk. Relative virtual address (RVA): The address of an item once it has been loaded into memory, with the base address of the image file subtracted from it in other words, the offset of an item within the image file loaded into memory. The RVA of an item almost always differs from its position within the file on disk (the file pointer). Virtual address (VA): The same as the RVA except that the base address of the image file is not subtracted. The address is referred to as virtual because the operating system creates a distinct virtual address space for each process, independent of physical memory. For almost all purposes, a virtual address should be considered simply as an address. A virtual address is not as predictable as an RVA because the loader might not load the image at its preferred location if a conflict exists with any image file already loaded a base address conflict. Section: The basic unit of code or data within a PE/COFF file. In addition to code and data sections, an image file can contain a number of sections, such as .tls (thread local storage) or .reloc (relocations), that have special purposes. All the raw data in a section must be loaded contiguously. Throughout this chapter (and indeed throughout the book), I use the term managed compiler to mean a compiler that targets the common language runtime and produces managed PE files. The term does not necessarily imply that the compiler itself is a managed application.
Universal Product Code Version A Generator In VB.NET
Using Barcode generation for .NET framework Control to generate, create GTIN - 12 image in VS .NET applications.
www.OnBarcode.com
Paint QR-Code In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create QR image in .NET framework applications.
www.OnBarcode.com
PE/COFF Headers
Printing Barcode In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
UCC - 14 Generator In VB.NET
Using Barcode creation for .NET framework Control to generate, create UPC Shipping Container Symbol ITF-14 image in VS .NET applications.
www.OnBarcode.com
Figure 4-2 illustrates the structure of operating system specific headers of a PE file. The headers include an MS-DOS header and stub, the PE signature, the COFF header, the PE header, and section headers. The following sections discuss all these components and the data directory table in the PE header.
PDF 417 Printer In Java
Using Barcode encoder for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
PDF 417 Generation In Java
Using Barcode drawer for Android Control to generate, create PDF 417 image in Android applications.
www.OnBarcode.com
MS-DOS Header/Stub and PE Signature
Quick Response Code Generation In None
Using Barcode drawer for Microsoft Excel Control to generate, create QR Code image in Excel applications.
www.OnBarcode.com
Barcode Generator In VS .NET
Using Barcode creator for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
The MS-DOS header and stub are present in image files only. Placed at the beginning of an image file, they represent a valid application that runs under MS-DOS. (Isn t that exciting ) The default stub prints the message This program cannot be run in DOS mode when the image file is run in MS-DOS. This is probably the least interesting part of operating system specific headers; the only relevant fact is that the MS-DOS header, at offset 0x3C, contains the file pointer to the PE signature, which allows the operating system to properly execute the image file.
Encoding Data Matrix 2d Barcode In Objective-C
Using Barcode creator for iPhone Control to generate, create Data Matrix ECC200 image in iPhone applications.
www.OnBarcode.com
Painting Barcode In None
Using Barcode printer for Office Excel Control to generate, create Barcode image in Microsoft Excel applications.
www.OnBarcode.com
CHAPTER 4 THE STRUCTURE OF A MANAGED EXECUTABLE FILE
Barcode Reader In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Code128 Drawer In Java
Using Barcode maker for Java Control to generate, create Code 128 Code Set C image in Java applications.
www.OnBarcode.com
MS DOS Header (64 Bytes)
Code-128 Drawer In Java
Using Barcode creation for Android Control to generate, create Code 128 Code Set B image in Android applications.
www.OnBarcode.com
Drawing European Article Number 13 In Java
Using Barcode drawer for Android Control to generate, create GS1 - 13 image in Android applications.
www.OnBarcode.com
MS DOS Stub (64 Bytes)
UCC-128 Generation In VS .NET
Using Barcode drawer for VS .NET Control to generate, create GS1 128 image in VS .NET applications.
www.OnBarcode.com
Barcode Generation In C#
Using Barcode encoder for .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
PE Signature (4 Bytes)
COFF Header (20 Bytes)
PE Header (224 Bytes)
Data Directory Table
Section Headers
Figure 4-2. The memory layout of operating system specific headers The PE signature that usually (but not necessarily) immediately follows the MS-DOS stub is a 4-byte item, identifying the file as a PE format image file. The signature contains the characters P and E, followed by 2 null bytes.
COFF Header
A standard COFF header is located immediately after the PE signature. The COFF header provides the most general characteristics of a PE/COFF file, applicable to both object and executable files. Table 4-1 describes the structure of the COFF header and the meaning of its fields.
Copyright © OnBarcode.com . All rights reserved.