tree 29b849a3fdffb802f8720f755a9ed0324b8e5b3f
parent 01d6f6a4adea984b95af38611bc1b50268f77d03
author Stuart Monteith <stuart.monteith@arm.com> 1394628241 +0000
committer Andreas Gampe <agampe@google.com> 1395081157 -0700

AArch64: Add memory allocation in low 4GB

MAP_32BIT is implemented for only x86_64. Other 64bit platforms
don't have an equivalent.

This is a unsophisticated implemention of a scheme using msync and
MAP_FIXED to reproduce the functionality of MAP_32BIT.

Adds MAP_FIXED to RemapAtEnd, as the address used for the new mmap
doesn't get located correctly without it on aarch64.

Add MemMap::next_mem_pos_ to store last position. Add a safety assert.

Change-Id: I61871ff7fc327554c43e1d7f448c3d376490f1ea