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Symbol Table Structure and Content
A-15 Common Object File Format
The entry for each symbol in the symbol table contains the symbol’s:
-
Name (or a pointer into the string table)
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Type
-
Value
-
Section it was defined in
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Storage class
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Basic type (integer, character, etc.)
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Derived type (array, structure, etc.)
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Dimensions
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Line number of the source code that defined the symbol
Section names are also defined in the symbol table.
All symbol entries, regardless of class and type, have the same format in the
symbol table. Each symbol table entry contains the 18 bytes of information
listed in Table A–10. Each symbol may also have an 18-byte auxiliary entry;
the special symbols listed in Table A–11 on page A-16 always have an auxiliary
entry. Some symbols may not have all the characteristics listed above; if a par-
ticular field is not set, it is set to null.
Table A–10. Symbol Table Entry Contents
Byte
Number
Type Description
0–7 Character This field contains one of the following:
1) An 8-character symbol name, padded with nulls
2) A pointer into the string table if the symbol name
is longer than 8 characters
8–11 Long integer Symbol value; storage class dependent
12–13 Short integer Section number of the symbol
14–15 Unsigned short
integer Basic and derived type specification
16 Character Storage class of the symbol
17 Character Number of auxiliary entries (always 0 or 1)