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Oracle® Solaris 11.4 Linkers and Libraries Guide

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Updated: October 2019
 
 

String Table Section

String table sections hold null-terminated character sequences, commonly called strings. The object file uses these strings to represent symbol and section names. You reference a string as an index into the string table section.

The first byte, which is index zero, holds a null character. Likewise, a string table's last byte holds a null character, ensuring null termination for all strings. A string whose index is zero specifies either no name or a null name, depending on the context.

An empty string table section is permitted. The section header's sh_size member contains zero. Nonzero indexes are invalid for an empty string table.

A section header's sh_name member holds an index into the section header string table section. The section header string table is designated by the e_shstrndx member of the ELF header. The following figure shows a string table with 25 bytes and the strings associated with various indexes.

Figure 13  ELF String Table

image:ELF string table example.

The following table shows the strings of the string table that are shown in the preceding figure.

Table 31  ELF String Table Indexes
Index
String
0
None
1
name
7
Variable
11
able
16
able
24
null string

As the example shows, a string table index can refer to any byte in the section. A string can appear more than once. References to substrings can exist. A single string can be referenced multiple times. Unreferenced strings also are allowed.