mmap2 - map files or devices into memory
This is probably not the system call that you are interested in; instead, see mmap(2), which describes the glibc wrapper function that invokes this system call.
The mmap2() system call provides the same interface as mmap(2), except that the final argument specifies the offset into the file in 4096-byte units (instead of bytes, as is done by mmap(2)). This enables applications that use a 32-bit
off_t to map large files (up to 2^44 bytes).
On success, mmap2() returns a pointer to the mapped area. On error, -1 is returned and
errno is set appropriately.
mmap2() is available since Linux 2.3.31.
This system call is Linux-specific.
This page is part of release 4.15 of the Linux
man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.