Function elf_getbase() returns the file offset in the containing archive of the first byte of the file referenced by ELF descriptor elf.
RETURN VALUES
Function elf_getbase() returns a valid file offset into the containing archive if successful. It returns -1 if argument elf is NULL or is not a member of an archive.
ERRORS
Function elf_getbase() may fail with the following errors:
[ELF_E_ARGUMENT]
Argument elf is not an ELF descriptor for an archive member.