Yeah, I don't think gdb in SE mode handles page faults well, but there was actually a change proposed very recently which should help improve that. You can probably cherry-pick that change locally if you want to try it out.
https://gem5-review.googlesource.com/c/public/gem5/+/44685 Gabe On Tue, Apr 20, 2021 at 11:16 PM Liyichao <liyic...@huawei.com> wrote: > Thanks Gabe. > > I think run gdb inside gem5 is of course a better method but slow speed. > > In se mode，I also have tried it， > but my program in se mode has a page fault panic before segment fault.I > think se mode cannot process page fault. > > > > > ------------------------------ > > 李翼超 charlie > Mobile：+86-15858232899 > Email：liyic...@huawei.com > > > *发件人： *Gabe Black<gabe.bl...@gmail.com> > *收件人： *gem5 users mailing list<gem5-users@gem5.org> > *抄送： *Liyichao<liyic...@huawei.com> > *主题： *Re: [gem5-users] How to debug a program in GEM5 FS mode. > *时间： *2021-04-21 14:06:58 > > Hello, Liyichao. While gdb debugging in gem5 is a great tool, it's a bit > limited as far as the sort of debugging you're talking about. It can see > the CPU state when you're in user space programs, but it doesn't understand > that different user space programs are different things, or know how to > look up their symbols, etc. It's intended primarily for debugging the > kernel, since that's frankly a more tractable problem. It would be possible > to extend that support to give it more insight into what's going on inside > the kernel so it can do more in that regard, and while I'd like to do that > at some point, that's not anything that will happen soon. > > If you want to debug a user space program inside gem5, I think your best > bet is to debug it in SE mode where the only thing running is your program. > SE mode is more approximate than FS mode and can't run every program, but > if it can run yours that's probably what you'll want to do. > > Another option would be to run gdb *inside* gem5, as part of the > simulation. I don't know if anybody has tried that, but then gdb should > work like it would on a real ARM host, more or less. > > Gabe > > On Tue, Apr 20, 2021 at 7:27 PM Liyichao via gem5-users < > gem5-users@gem5.org> wrote: > >> Hi All: >> >> I am currently debugging a program with an SVE instruction in >> the FS mode of GEM5. However, a segment error occurs in the program. >> Therefore, I want to locate which instruction is causing the error and >> check the contents of the register of the error instruction. What are the >> debugging methods of GEM5 for applications in FS mode? Because programs >> with SVE instructions cannot be debugged directly on the ARM server, I want >> to debug in FS mode of GEM5. >> >> >> >> Does the Remote GDB support the preceding operations? Are there detailed >> instructions for REMOTE GDB? The Remote GDB guidance on the GEM5 website is >> a little brief. >> >> >> >> TKS. >> _______________________________________________ >> gem5-users mailing list -- gem5-users@gem5.org >> To unsubscribe send an email to gem5-users-le...@gem5.org >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > >
_______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
