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It looks like this function is supposed to allow you to set up a PC based event which will trigger when the simulator executes a particular kernel function. That event doesn't actually do anything, but you can set a breakpoint there with gdb when debugging gem5 itself. There are a couple of problems with this function. First, it assumes that you want to set the breakpoint based on the first system in your simulation. Frequently simulations have only one system, but there isn't any rule that says they must, or any way to pick a different system. Second, this function assumes that you're in FS mode, that there is a kernel, and that there is a kernel symbol table to look symbols up in. On top of that, this function is a bit redundant since you can just use gdb to debug the kernel inside a simulated system. Change-Id: I8dadbd42fc7d4ccba2a035a2a72e6ede4b872f3c Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24644 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.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/Introduction, and for more information about building the simulator and getting started please see http://www.gem5.org/Documentation and http://www.gem5.org/Tutorials. 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/Dependencies 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/Build_System for more details and options. With the simulator built, have a look at http://www.gem5.org/Running_gem5 for more information on how to use gem5. 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. Please see the gem5 download page for these items at http://www.gem5.org/Download If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.