For the gdbserver approach, I haven't found a guest to host networking possibility in gem5 yet: https://stackoverflow.com/questions/48941494/how-to-do-port-forwarding-from-guest-to-host-and-vice-versa-in-gem5 but maybe I missed it.
For a non-gdbserver approach, have you tried add-symbol-file as mentioned at https://stackoverflow.com/questions/26271901/is-it-possible-to-use-gdb-and-qemu-to-debug-linux-user-space-programs-and-kernel/46636070#46636070 and https://stackoverflow.com/questions/20380204/how-to-load-multiple-symbol-files-in-gdb BTW, have a look into lx-symbols to help with kernel modules in case you are not using it yet: https://cirosantilli.com/linux-kernel-module-cheat/#gdb-step-debug-kernel-module BTW2 Dealing with userland apps perfectly from gem5 GDB stub (including multiple userland programs with same address) asked at: https://stackoverflow.com/questions/9561546/thread-aware-gdb-for-the-linux-kernel On Tue, May 19, 2020 at 8:03 PM GAURAV JAIN via gem5-dev <gem5-dev@gem5.org> wrote: > > Hi All, > > We are trying to debug an application running inside gem5 full system. > > After running gem5, we are using 'gdb vmlinux' to attach to it so as to be > able to debug the kernel modules. > > One approach we tried was using the 'file' command to load the symbol table > for the application and continue. But then that approach would overwrite the > existing symbol table (for the kernel modules) with that of the application > which is not what we desire. > > The second approach we tried was running 'gdbserver' inside m5term and then > connect to it through a gdb instance running on the host. > > We did - 'gdbserver localhost:1234 ./app', which seemed to be successful in > launching a process and Listening on the port 1234. > > On the host, we did - 'gdb ./app' and from inside it, 'target remote :1234'. > Doing this did not work and we got the generic error - 'remote:1234 > connection timed out' > > It'd be great if someone could provide pointers on how can we debug an > application running in gem5 full system and if either of the two approaches > mentioned above would work. > > Thanks, > Gaurav > _______________________________________________ > gem5-dev mailing list -- gem5-dev@gem5.org > To unsubscribe send an email to gem5-dev-le...@gem5.org > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s _______________________________________________ gem5-dev mailing list -- gem5-dev@gem5.org To unsubscribe send an email to gem5-dev-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
