elf(5) on FreeBSD
The text 3e7a5951bbc4, as FreeBSD 6.3-RELEASE, FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE shipped it.
format of ELF executable binary files
The text 3e7a5951bbc4, as FreeBSD 6.3-RELEASE, FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE shipped it.
format of ELF executable binary files