Sections with sh_type == SHT_STRTAB are called string tables.
They hold a null separated array of strings.
Such sections are used by other sections when string names are to be used. The using section says:
  • which string table they are using
  • what is the index on the target string table where the string starts
So for example, we could have a string table containing:
Data: \0 a b c \0 d e f \0
Index: 0 1 2 3  4 5 6 7  8
The first byte must be a 0. TODO rationale?
And if another section wants to use the string d e f, they have to point to index 5 of this section (letter d).
Notable string table sections:
  • .shstrtab
  • .strtab