ELF File Format Explained
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- čas přidán 27. 08. 2024
- 🔥 Learn How The ELF File Format Works
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📜 Video Description:
What is the ELF File Format?
The ELF (Executable and Linkable Format) is a standard file format used in Unix-like operating systems for executables, object code, shared libraries, and core dumps. It is designed to support various features such as dynamic linking, executable generation, and core file creation. The format's flexibility and extensibility make it an essential part of system-level programming on Linux, Solaris, FreeBSD, and other Unix-based systems. The ELF file is divided into three main sections: the ELF header, the program header table, and the section header table, each serving distinct purposes in the file's execution and linking processes.
COFF vs. ELF File Format
The COFF (Common Object File Format) and ELF (Executable and Linkable Format) are both file formats for executables, object code, and shared libraries. COFF, used primarily in older Unix systems and some Windows applications, is simpler but less flexible than ELF. ELF, developed as a successor to COFF, offers enhanced features such as better support for dynamic linking and more detailed metadata structures. While COFF uses fixed-size headers and is relatively straightforward, ELF's extensible and modular design allows for more complex and powerful executable management. As a result, ELF has become the preferred format for modern Unix-like operating systems, providing greater capabilities and efficiency in program execution and development.
ELF File Format vs Windows PE File Format
The ELF (Executable and Linkable Format) and Windows PE (Portable Executable) file formats serve similar purposes on different operating systems. ELF is the standard for Unix-like systems, including Linux, while PE is used on Windows. Both formats encapsulate executable code, data, and metadata necessary for program execution and dynamic linking. However, they differ significantly in structure and design principles. ELF is more flexible and supports features like position-independent code (PIC) and dynamic loading with greater ease. In contrast, PE is tailored to the Windows environment, integrating tightly with the Windows loader and operating system features such as the Win32 API. While ELF provides extensive support for various Unix system capabilities, PE's design focuses on Windows-specific functionalities, making each format optimal for its respective operating system.
📝 Timestamps:
00:00 ELF File Format Header
1:35 Malcore.io = DANK
02:38 ELF Header Continued
03:30 Program Header
05:10 Section Headers
06:03 Handling and Attributes
✏️ Tags:
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What is the ELF Header?
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What is the ELF Header, you ask? It is the first section of an ELF file that contains essential metadata. The COFF Loader is used to load COFF files into memory. The ELF file structure includes the ELF header, program headers, and section headers. The executable and linkable format (ELF) is standard for Unix-like systems. The COFF File Format is an older format used in Unix and some Windows systems. COFF headers contain information necessary for loading and linking. The COFF header file includes the definitions for the COFF format. The COFF file structure organizes code, data, and other information. COFF file sections contain specific types of data, such as code or relocations. The executable and linkable format file format is widely used for executables and shared libraries. An ELF file is an instance of the ELF format used in Unix-like systems. What is the ELF Header? It is the part of the ELF file that provides essential information for execution. The ELF Loader loads ELF files into memory for execution.
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