![]() This affects interpretation of multi-byte fields starting with offset 0x10. This byte is set to either 1 or 2 to signify little or big endianness, respectively. This byte is set to either 1 or 2 to signify 32- or 64-bit format, respectively. The ELF header is 52 or 64 bytes long for 32-bit and 64-bit binaries respectively.Į_ident through e_identĠx7F followed by ELF( 45 4c 46) in ASCII these four bytes constitute the magic number. The header contains three fields that are affected by this setting and offset other fields that follow them. The ELF header defines whether to use 32-bit or 64-bit addresses. Data referred to by entries in the program header table or section header tableĠ0000000 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 |.Section header table, describing zero or more sections. ![]() Program header table, describing zero or more memory segments.This has allowed it to be adopted by many different operating systems on many different hardware platforms.Įach ELF file is made up of one ELF header, followed by file data. For instance, it supports different endiannesses and address sizes so it does not exclude any particular central processing unit (CPU) or instruction set architecture. In 1999, it was chosen as the standard binary file format for Unix and Unix-like systems on x86 processors by the 86open project.īy design, the ELF format is flexible, extensible, and cross-platform. ![]() First published in the specification for the application binary interface (ABI) of the Unix operating system version named System V Release 4 (SVR4), and later in the Tool Interface Standard, it was quickly accepted among different vendors of Unix systems. In computing, the Executable and Linkable Format ( ELF, formerly named Extensible Linking Format), is a common standard file format for executable files, object code, shared libraries, and core dumps. An ELF file has two views: the program header shows the segments used at run time, whereas the section header lists the set of sections.
0 Comments
Leave a Reply. |