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NAME

       mmap2 - map files or devices into memory

SYNOPSIS

       #include <sys/mman.h>
       #include <syscall.h>
       #include <errno.h>

       _syscall6(void *, mmap2, void *, start, size_t, length, int, prot, int,
       flags, int, fd, off_t, pgoffset)

       void * mmap2(void *start, size_t length, int prot, int flags,  int  fd,
       off_t pgoffset);

DESCRIPTION

       The  function  mmap2()  operates  in  exactly  the same way as mmap(2),
       except that the final argument specifies the offset into  the  file  in
       units  of  the  system  page  size  (instead  of  bytes).  This enables
       applications that use a 32-bit off_t to map larger files (typically  up
       to 2^44 bytes).

RETURN VALUE

       On  success,  mmap2() returns a pointer to the mapped area. On error -1
       is returned and errno is set appropriately.

ERRORS

       EFAULT Problem with getting the data from userspace.

NOTES

       The function mmap2() is available since  Linux  2.3.31.   It  is  Linux
       specific, and should be avoided in portable applications.  See also the
       mmap64() function that is part of the LFS (Large File Summit).

SEE ALSO

       getpagesize(2), mmap(2), mremap(2), msync(2), shm_open(2)