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This verifies that the slightly more complex --addr command line option behaves as expected. Also, like the inst and semi call type unit tests, it will either attempt to successfully perform a call to the "sum" m5 op if it's told it's running under gem5, or it will attempt to catch itself failing to run that command by using mprotect to block its access to the mmap-ed region and then looks at the siginfo_t to make sure the attempted access was to the right place, etc. It also will attempt to verify the details of the mmap if possible by looking up information about its own mmap-ings in /proc. If the file it would expect to find the mappings in doesn't exist, it prints a warning and gives up. If it does, it looks through it to find the line corresponding to the m5 ops, and then checks some details of the mapping like its size and its offset in the target file. The offset would correspond to the physical address if using the real /dev/mem. Change-Id: Icc14cd9ac02eae93c56f1f2aa78fd67d8540a2f2 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27751 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Gabe Black <gabe.black@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.