AT&T UNIX™PC Unix System V Users Manual - tenox

SYMS ( 4) SYMS ( 4)
NAME
syms - common object file symbol table format
SYNOPSIS
#include
DESCRIPTION
Common object files contain information to support symb olic
software testing (see sdb (1 ). Line number entries, linenum( 4), and
extensive symbolic information permit testing at the C source
level. Every object file's symbol table is organized as shown
below.
File name 1.
Function 1.
Local symbols for function 1.
Function 2
Local symbols for function 2.
Static externs for file 1.
File name 2.
Function 1.
Local symbols for function 1.
Function 2.
Local symbols for function 2.
Static externs for file 2.
Defined global symbols.
Undefined global symbols.
The entry for a symbol is a fixed-length structure. The members
of the structure hold the name (null padded), its value, and other
information. The C structure is given below.
#define SYMNMLEN 8
#define FILNMLEN 14
struct syment
{
char
n_name[SYMNMLEN] ;
long
n_value ; I* value of symbol *I
short
n_scnum ; I* section number *I
unsigned short n_type ; I* type and derived type *I
char
n_sclass ; I* storage class *I
char
n_numaux ; I* number of aux entries *I
} ;
Meaningful values and explanations for them are given in both
syms.h and Common Object File Format. Anyone who needs to
interpret the entries should seek more information in these
sources. Some symbols require more information than a single
entry; they are followed by auxiliary entries that are the same size
as a symbol entry. The format follows.
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