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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (c) 1996 Tom Bjorkholm <tomb@mydata.se>
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public
.\" License along with this manual; if not, write to the Free
.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
.\" USA.
.\"
.\" 1996-04-11 Tom Bjorkholm <tomb@mydata.se>
.\" First version written (1.3.86)
.\" 1996-04-12 Tom Bjorkholm <tomb@mydata.se>
.\" Update for Linux 1.3.87 and later
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sun Feb 23 16:44:36 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Tue Nov 26 JST 2002 by Kentaro Shirakata <argrath@ub32.org>
.\"
.\"WORD: virtual memory ۥ
.\"WORD: remap ƥޥåԥ
.\"WORD: argument
.\"WORD: address space ɥ쥹
.\"WORD: page align ڡ
.\"WORD: linear ˥
.\"WORD: process ץ
.\"WORD: segment
.\"WORD: real memory ¥
.\"WORD: segmentation violation ơ
.\"WORD: segmentation fault ơȿ
.\"WORD: scheme
.\"WORD: implement
.\"WORD: lock å
.\"
.TH MREMAP 2 1996-04-12 "Linux 1.3.87" "Linux Programmer's Manual"
.SH ̾
mremap \- ۥꡦɥ쥹ƥޥåԥ
.SH
.B #include <unistd.h>
.br
.B #include <sys/mman.h>
.sp
.BI "void * mremap(void *" old_address ", size_t " old_size
.BI ", size_t " new_size ", unsigned long " flags );
.fi
.SH
\fBmremap\fR ¸ߤꡦޥåפĥ(ޤϽ̾)롣
Ʊˤϰư뤫⤷ʤ(\fIflags\fR
Ѳǽʲ(virtual)ɥ쥹֤ˤäƷޤ)
\fIold_address\fR ϳĥ(ޤϽ̾)褦Ȥ벾ۥꡦ֥å
θΥɥ쥹\fIold_address\fR ϥڡ(align)˹äƤʤ
ʤʤȤդ뤳ȡ\fIold_size\fR ϸβۥꡦ֥å
\fInew_size\fR ᤹ѹβۥꡦ֥åΥ
\fIflags\fR ϥե饰ΥӥåȥޥåפǤ롣
Linux Ǥϥϥڡʬ䤵롣桼ץ(Ĥޤ)
ʣΥ˥(linear)ʲۥꡦ(segment)ġ
줾βۥꡦȤϰĤޤϤʾμ(real)ꡦڡ
˥ޥåԥƤ(ޥåԥϥڡơ֥Ǵ)
ۥꡦȤˤϥݸ()ꤵƤꡢ
꤬˥줿(㤨ɤ߹ѤΥȤ
)ơ(segmentation violation)
ޤȳβۥ˥ˤ
ơȯ롣
\fBmremap\fR Linux Υڡơ֥Ѥ롣\fBmremap\fR
ۥɥ쥹ȥꡦڡΥޥåԥѹ롣˸ΨŪ
\fBrealloc\fR Τ˻ѤƤ롣
.SH ե饰
.TP
.B MREMAP_MAYMOVE
ߤβۥɥ쥹ǥѹǤʤԤ
ۥɥ쥹ѹ뤳Ȥؼ롣
.SH ֤
\fBmremap\fR ϿۥΰؤΥݥ֤
顼ξ
.B MAP_FAILED
(Ĥޤ (void *) \-1) ֤졢\fIerrno\fR Ŭڤꤵ롣
.SH 顼
.TP
.B EAGAIN
ꡦȤå(lock)ƤꡢƥޥåԥǤʤ
.TP
.B EFAULT
֥ơȿ(segmentation fault)
\fIold_address\fP \fIold_address\fP+\fIold_size\fP
ϰϤΥɥ쥹Τɤ줫Υץˤʲۥꡦɥ쥹Ǥ롣
Ȥᤷɥ쥹Τޤ褦ʥޥåԥäȤƤ⡢
Υޥåԥۤʤäʤ EFAULT
.TP
.B EINVAL
ʰͿ줿Ƥ \fIold_address\fR ڡ
äƤʤ
.TP
.B ENOMEM
ߤβۥɥ쥹Ǥϥΰ褬ĥǤ
.B MREMAP_MAYMOVE
ե饰 \fIflags\fR ꤵƤʤ
ޤϽʬ()꤬¸ߤʤ
.SH
ߤΥС glibc Υ롼ɥեǤϡ
.B MREMAP_MAYMOVE
뤿ˤϡ<sys/mman.h> 롼ɤ
_GNU_SOURCE ɬפ롣
.SH
Υ Linux ͭǤꡢܿտޤץǻѤƤ
ʤ4.2BSD ˤ (ºݤ˼Ƥ櫓ǤϤʤ)
ۤä(semantics)ˤ
.BR mremap (2)
뤬ä
.SH Ϣ
.BR brk (2),
.BR getpagesize (2),
.BR mmap (2),
.BR sbrk (2),
.BR realloc (3),
.BR malloc (3)
.P
ڡʬ䤵줿ˤĤƤäȾܤΤꤿʤ
ʤιߤ OS ζʽȤ뤳ȡ
(\fIModern Operating Systems\fR by Andrew S. Tannenbaum,
\fIInside Linux\fR by Randolf Bentson,
\fIThe Design of the UNIX Operating System\fR by Maurice J. Bach.)
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