ELF is specified by the https://en.wikipedia.org/wiki/Linux_Standard_Base[LSB]:
* core generic: https://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/elf-generic.html
* core AMD64: https://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/book1.html

The LSB basically links to other standards with minor extensions, in particular:

* Generic (both by https://en.wikipedia.org/wiki/Santa_Cruz_Operation[SCO]):
  * System V ABI 4.1 (1997) http://www.sco.com/developers/devspecs/gabi41.pdf, no 64 bit, although a magic number is reserved for it. Same for core files. \i[This] is the first document you should look at when searching for information.
  * System V ABI Update DRAFT 17 (2003) http://www.sco.com/developers/gabi/2003-12-17/contents.html, adds 64 bit. Only updates chapters 4 and 5 of the previous document: the others remain valid and are still referenced.
* Architecture specific (by the processor vendor):
  * IA-32: https://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-IA32/LSB-Core-IA32/elf-ia32.html, points mostly to http://www.sco.com/developers/devspecs/abi386-4.pdf
  * AMD64: https://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/elf-amd64.html, points mostly to http://www.x86-64.org/documentation/abi.pdf

A handy summary can be found at:
``
man elf
``


Elf hello world/standards

ID: elf-hello-world/standards