NAME
end,
etext,
edata —
end boundaries of image segments
SYNOPSIS
extern int end;
extern int etext;
extern int edata;
DESCRIPTION
The globals
end,
etext and
edata are program segment end addresses.
etext is located at the first address after the end of the
text segment.
edata is located at the first address after the end of the
initialized data segment.
end is located at the first address after the end of the
data segment (BSS) when the program is loaded. Use the
sbrk(2) system call with zero as
its argument to find the current end of the data segment.
SEE ALSO
sbrk(2),
malloc(3),
a.out(5)
HISTORY
An
end manual page appeared in
Version 6
AT&T UNIX.
BUGS
Traditionally, no variable existed that pointed to the start of the text segment
because the text segment always started at address zero. Although it is no
longer valid to make this assumption, no variable similar to the ones
documented above exists to point to the start of the text segment.