minated
by a NUL character.  If the stab lacks a string (for example, it was
produced by a '.stabn' or '.stabd' directive), the 'n_strx' field is
zero.

   Symbol table entries with 'n_type' field values greater than 0x1f
originated as stabs generated by the compiler (with one random
exception).  The other entries were placed in the symbol table of the
executable by the assembler or the linker.