Le 22/03/2018 à 12:07, Peter Maydell a écrit : > On 22 March 2018 at 11:05, Peter Maydell <[email protected]> wrote: >> On 22 March 2018 at 10:36, Laurent Vivier <[email protected]> wrote: >>> It goes wrong in this part: >>> >>> + */ >>> + if (is_write && info->si_signo == SIGSEGV && info->si_code == >>> SEGV_ACCERR && >>> + h2g_valid(address)) { >>> >>> Because, on ppc, si_code is SEGV_MAPERR and not SEGV_ACCERR >>> (on x86_64, si_code is SEGV_ACCERR as expected) >> >> So on PPC if you have a page mapped, and you access it with >> the wrong permissions, you get SEGV_MAPERR? This seems like >> a host kernel bug to me. > > ...in particular, kernel commit ecb101aed86156e (dated Dec 2017) > fixes a regression introduced in commit c3350602e876 that broke > the ppc kernels so they started returning SEGV_MAPERR here > instead of SEGV_ACCERR. Presumably your host kernel is missing > this fix.
Yes, you're right, my kernel is 4.14-rc1 (6e80ecd) with c3350602e876 but without ecb101aed86156e. I'm going to update it. Thanks, Laurent
