49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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/* Map addresses starting near ADDR and extending for LEN bytes. From
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OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
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is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
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set in FLAGS, the mapping will be at ADDR exactly (which must be
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page-aligned); otherwise the system chooses a convenient nearby address.
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The return value is the actual mapping address chosen or MAP_FAILED
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for errors (in which case `errno' is set). A successful `mmap' call
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deallocates any previous mapping for the affected region. */
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void *
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__mmap64 (void *addr, size_t len, int prot, int flags, int fd,
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__off64_t offset)
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{
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off_t small_offset = (off_t) offset;
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if (small_offset != offset)
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{
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/* We cannot do this since the offset is too large. */
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__set_errno (EOVERFLOW);
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return MAP_FAILED;
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}
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return __mmap (addr, len, prot, flags, fd, small_offset);
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}
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weak_alias (__mmap64, mmap64)
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libc_hidden_def (__mmap64)
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