[Bug sanitizer/64435] [5 Regression] Bootstrap failure in libsanitizer on AArch64 with Linux kernel <= 3.15

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64435

--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Trying a PIE on aarch64 reveals:
2aaca300000-2aaca310000 r-xp 00000000 fd:00 17567415                     /tmp/m
2aaca310000-2aaca320000 rw-p 00000000 fd:00 17567415                     /tmp/m
mappings alongside of 3ffXXXXXXXX, thus we need low mem from 0 to 2GB or 4GB?,
then maybe some middle memory, and then high memory.