Manual Reference Pages - EDATA (3)
- end boundaries of image segments
.Vt extern end ;
.Vt extern etext ;
.Vt extern edata ;
are program segment end addresses.
is the first address after the end of the text segment.
is the first address after the end of the initialized data segment.
is the first address after the end of the data segment
when the program is loaded.
system call with zero as its argument to find the current end of the
manual page appeared in
AT&T v6 .
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Although it is no longer valid to make this assumption, no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.
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