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

LINENUM ( 4) LINENUM ( 4)
NAME
linenum - line number entries in a common object file
SYNOPSIS
#include
DESCRIPTION
Compilers based on pee generate an entry in the object file for
each C source line on which a breakpoint is possible (when
invoked with the -g option; see ee(1)). Users can then reference
line numbers when using the appropriate software test system (see
sdb (1 )). The structure of these line number entries appears below.
struct lineno
{
} ;
UniOn
{
long l_symndx ;
long l_paddr ;
}
l_addr ;
unsigned short l_lnno ;
Numbering starts with one for each function. The initial line
number entry for a function has l_lnno equal to zero, and the symbol
table index of the function's entry is in l_symndx . Otherwise,
l_lnno is non-zero, and l_paddr is the physical address of the code
for the referenced line. Thus the overall structure is the following:
SEE ALSO
cc(1), sdb(1), a.out(4).
l_addr l_lnno
function symtab index 0
physical address line
physical address line
function symtab index 0
physical address line
physical address line
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