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END(3)                  NetBSD Library Functions Manual                 END(3)


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     Although it is no longer valid to make this assumption, no variable simi-
     lar to the ones documented above exists to point to the start of the text
     segment.

NetBSD 10.1                    September 1, 2005                   NetBSD 10.1