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This cleans up the mmap-ing. This is primarily used for testing since the tests may end up mmap-ing the backing file many times, and we don't want all those earlier mappings lying around. This change also makes the original mmap-ing function close the file it opens, since the man page for mmap explicitly says you can do that and not lose the mapping. That means we don't have to keep track of the file descriptor which corresponds to the mmap-ed file when we do the unmapping, and it's slightly cleaner in general. Change-Id: I90e3e755cebf3d03e2bf644adf8ef3e157236172 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27750 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Pouya Fotouhi <pfotouhi@ucdavis.edu> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, SWIG, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/documentation/general_docs/building for more details concerning the minimum versions of the aforementioned tools. Once you have all dependencies resolved, type 'scons build/<ARCH>/gem5.opt' where ARCH is one of ARM, NULL, MIPS, POWER, SPARC, or X86. This will build an optimized version of the gem5 binary (gem5.opt) for the the specified architecture. See http://www.gem5.org/documentation/general_docs/building for more details and options. The basic source release includes these subdirectories: - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you will need compiled system firmware (console and PALcode for Alpha), kernel binaries and one or more disk images. If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.