FreeBSD: Even i386 uses SIGSEGV under some conditions
FreeBSD: Force B2 JIT code into 32-bits

Also, don't provide mmap() hints beyond 32-bits, so future MAP_FIXED
allocations work.
FreeBSD: Put SS RAM in lower 32-bits
FreeBSD: Enable SS JIT on 64-bit
FreeBSD: Page-align fixed mmaps
Merge pull request #9 from vasi/freebsd

Freebsd