https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78176
--- Comment #30 from Thomas De Schampheleire <patrickdepinguin at gmail dot com> --- (In reply to mpf from comment #29) > I don't remember the detail of this issue but I believe I was convinced that > it is down to the lack of setting PX appropriately in HW. UX==0, PX==1. The > PX control bit forces address calculations i.e. base + imm or base + reg to > be performed with 32-bit rules but allows 64 instruction usage. Since there > is a processor mode that is perfectly capable of meeting the requirements of > a program with 64bit data and 32bit pointers then the solution is to set PX > for N32 rather than UX. This would have to be done by the kernel when switching to an application, correct? And then only for n32 applications, not for n64 or others.
