In our case, the processor is in a family of using x86 architecture (xeon) Compilers are designed to translate C code into machine language for a variety of processor architectures. The binary a.out's instructions are written in machine language that CPU can understand. The a.out is written that's can not be easily read, however, if we use objdump, we can see how the a.out looks like after being translated machine code for the main() function.Ĩ048369: 8d 61 fc lea 0xfffffffc(%ecx),%esp ![]() It contains metadata, and multiple sections of code and data. ![]() On Linux, this format is typically ELF, on Windows it's PE (Portable Executable), a modified version of the Unix COFF file format, including object code and DLLs, and on Mac OS X it's Mach-O. It's now written using ELF (Executable and Linkable Format) format in most of the linux systems.Īctually, executable code is created by the compiler and the linker, but it's the linker that puts things in the binary format. The a.out is one of the output file formats. ![]() We get a.out (Assembler Output), and if we open it with an editor, what we see is something like this:
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