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.\" Copyright (c) 2008, Linux Foundation, written by by Michael Kerrisk
.\" <mtk.manpages@gmail.com>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\" License.
.\"
.\" Japanese Version Copyright (c) 2008 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated 2008-08-21, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.05
.\"
.TH END 3 2008-07-17 "GNU" "Linux Programmer's Manual"
.SH ̾
etext, edata, end \- ץॻȤν
.SH
.nf
.BI extern " etext" ;
.BI extern " edata" ;
.BI extern " end" ;
.fi
.SH
ΥܥΥɥ쥹ϳƼΥץॻȤν
.TP
.I etext
ƥȥ (ץΥ) μΥɥ쥹
.TP
.I edata
줿ǡΥȤμΥɥ쥹
.TP
.I end
ƤʤǡΥ (BSS ȤȤ)
μΥɥ쥹
.SH
ΥܥĹǯۤȤɤ Unix ƥƤ뤬
ɸಽƤϤʤդƻȤȡ
.SH
ץǤϤΥܥŪʤФʤʤ
ϤɤΥإåեǤƤʤ
ĤΥƥǤϡΥܥ̾˥
դƤơ
.IR _etext ,
.IR _edata ,
.I _end
ȤʤäƤ롣
Linux ǥѥ뤵줿ץǤϡ
ΥܥǤ롣
ץμ¹Գϻˡץࡦ֥졼
.I &end
ζΤɤ (餯ΥڡƬ) ˤʤ롣
ʤ顢
.BR brk (2)
.BR malloc (3)
ǥ꤬ƤϢơץࡦ֥졼ѲƤ
0 ꤷ
.BR sbrk (2)
ƤӽФȤǡץࡦ֥졼θͤΤ뤳ȤǤ롣
.SH
Υץ¹ԤȡΤ褦ʽϤ롣
.in +4n
.nf
.RB "$" " ./a.out"
First address past:
program text (etext) 0x8048568
initialized data (edata) 0x804a01c
uninitialized data (end) 0x804a024
.fi
.SS ץΥ
\&
.in
.nf
#include <stdio.h>
#include <stdlib.h>
extern char etext, edata, end; /* The symbols must have some type,
or "gcc -Wall" complains */
int
main(int argc, char *argv[])
{
printf("First address past:\\n");
printf(" program text (etext) %10p\\n", &etext);
printf(" initialized data (edata) %10p\\n", &edata);
printf(" uninitialized data (end) %10p\\n", &end);
exit(EXIT_SUCCESS);
}
.fi
.SH Ϣ
.BR objdump (1),
.BR readelf (1),
.BR sbrk (2),
.BR elf (5)
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