From 2f35ab9b82f18c1ba7b27fb804859d6ed8482796 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Fri, 27 Mar 2009 23:21:09 +0000 Subject: * mremap.c: New file. * configure.ac: Call AC_REPLACE_FUNCS on mremap. * gold.h (MREMAP_MAYMOVE): Define if HAVE_MREMAP is not defined. (mremap): Declare if HAVE_MREMAP is not defined. * configure, Makefile.in, config.in: Rebuild. --- gold/mremap.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 gold/mremap.c (limited to 'gold/mremap.c') diff --git a/gold/mremap.c b/gold/mremap.c new file mode 100644 index 0000000..caa7bc7 --- /dev/null +++ b/gold/mremap.c @@ -0,0 +1,57 @@ +/* mremap.c -- version of mremap for gold. */ + +/* Copyright 2009 Free Software Foundation, Inc. + Written by Ian Lance Taylor . + + This file is part of gold. + + This program is free software; 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 3 of the License, or + (at your option) any later version. + + This program 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 program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "config.h" +#include "ansidecl.h" + +#include +#include +#include + +/* This file implements mremap for systems which don't have it. The + gold code requires support for mmap. However, there are systems + which have mmap but not mremap. This is not a general replacement + for mremap; it only supports the features which are required for + gold. In particular, we assume that the MREMAP_MAYMOVE flag is + set. */ + +/* Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS. */ + +#ifndef MAP_ANONYMOUS +# define MAP_ANONYMOUS MAP_ANON +#endif + +void * +mremap (void *old_address, size_t old_size, size_t new_size, + int flags ATTRIBUTE_UNUSED, ...) +{ + void *ret; + + ret = mmap (0, new_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (ret == MAP_FAILED) + return ret; + memcpy (ret, old_address, + old_size < new_size ? old_size : new_size); + (void) munmap (old_address, old_size); + return ret; +} -- cgit v1.1