Description: ELF, which stands for ‘Executable and Linkable Format’, is a standard file format primarily used for executable files, shared libraries, and object files in Unix and Unix-like operating systems. This format was designed to be flexible and extensible, allowing developers to include different types of information in a single file. One of its most notable features is its ability to support multiple hardware architectures, making it an ideal choice for applications that need to run on various platforms. ELF organizes information into sections and segments, facilitating the loading and execution of programs, as well as the linking of libraries. Additionally, its structure allows for the inclusion of metadata, such as debugging information, which is crucial for software development. Due to its modular design, ELF has gained popularity in the software development field, especially in environments where interoperability and portability are essential. In summary, ELF is a fundamental format in modern software architecture, providing a solid foundation for the execution and linking of applications across various operating systems.
History: ELF was introduced in 1995 as part of the Linux operating system, designed by the GNU software development project. Its creation was driven by the need for a file format that could handle the increasing complexity of operating systems and applications. Over the years, ELF has evolved and become the de facto format for most Linux distributions, replacing earlier formats like a.out. In 2001, the ELF format was standardized by the developer community, facilitating its adoption in other operating systems.
Uses: ELF is primarily used to store executable files and shared libraries in Unix-based operating systems. It is also employed in software development to facilitate debugging and linking of libraries. Its modular structure allows developers to include additional information, such as symbols and debugging sections, which enhances efficiency in the development and maintenance of applications.
Examples: An example of an ELF file is the executable of a program in Linux, such as ‘bash’ or ‘gcc’. Additionally, shared libraries in Linux, like ‘libc.so’, are also in ELF format. Another case is the use of ELF in embedded systems, where it is used to run applications on resource-constrained devices.
