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Updating CPSR needs to be SerializeAfter to ensure that all following instructions are executed with the new CPSR. Otherwise, for example, the following instructions will access the banked registers from the previous mode. The missing IsSerializeAfter had the consequence that the instruction rfe (return from exception) did not work correctly with the DerivO3CPU model. Jira Issue: https://gem5.atlassian.net/browse/GEM5-303 Change-Id: I999623c0fc92cfcd4c3550b9cb34e8564a92e3e6 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24943 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com> (cherry picked from commit 0d665d4f9893320db4f3b5f7014a6e10c3420b69) Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25013 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.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 ALPHA, 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.