mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 12:11:10 +00:00
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* mmap - map files or devices into memory. Linux version.
|
|
Copyright (C) 2017-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/mman.h>
|
|
#include <sysdep.h>
|
|
#include <stdint.h>
|
|
|
|
#ifndef __OFF_T_MATCHES_OFF64_T
|
|
# include <mmap_internal.h>
|
|
|
|
/* An architecture may override this. */
|
|
# ifndef MMAP_ADJUST_OFFSET
|
|
# define MMAP_ADJUST_OFFSET(offset) offset
|
|
# endif
|
|
|
|
void *
|
|
__mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
|
|
{
|
|
MMAP_CHECK_PAGE_UNIT ();
|
|
|
|
if (offset & MMAP_OFF_LOW_MASK)
|
|
return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
|
|
|
|
#ifdef __NR_mmap2
|
|
return (void *) MMAP_CALL (mmap2, addr, len, prot, flags, fd,
|
|
offset / (uint32_t) MMAP2_PAGE_UNIT);
|
|
#else
|
|
return (void *) MMAP_CALL (mmap, addr, len, prot, flags, fd,
|
|
MMAP_ADJUST_OFFSET (offset));
|
|
#endif
|
|
}
|
|
weak_alias (__mmap, mmap)
|
|
libc_hidden_def (__mmap)
|
|
|
|
#endif /* __OFF_T_MATCHES_OFF64_T */
|