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Currently the System class has a mechanism to wait for a GDB connection for each CPU which has requested it through one of its parameters. Unfortunately, not every thread context/CPU will be ready for GDB at that point, particularly considering that in an FS simulation the kernel won't have been read so there will be no symbols, none of the registers or the entry point will have been set. Also in the fast models, the CPUs haven't had a chance to initialize themselves enough by that point to respond to the API calls which are used to implement GDB support. Change-Id: If27cb3e0259a1f67599ab0493695b2f8af640d8e Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24963 Reviewed-by: Gabe Black <gabeblack@google.com> Reviewed-by: Chun-Chen TK Hsu <chunchenhsu@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Gabe Black <gabeblack@google.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.