Rationale: Previouly, Unicorn uses several hacks to pretend it supports
floating point instructions while not properly setting up something
like CPU features. Therefore, once related registers like CR4 is reset,
the hacks stop working and UC_ERR_INSN_INVALID is thrown. Setting the default
model to a CPu that has basical floating point support should have the
minimal break changes.
Some structs, specically CPUARMState is 16-bytes aligned.
This causes segment fault because gcc tends to vectorize
the assignment of the struct with infamous movaps tricks.
Without this patch, we fail on manylinux with 2.17 glibc
in release mode in i686.
qemu_memalign will ensure the alignment across platforms.
Unicorn has included some ugly hacks to provide a envirement where vaddr == paddr.
These hacks where to use the full 64 bit mappings on x86 without init the mmu
and some memory redirect for MIPS.
The UC_TLB_CPU mode defaults to vaddr == paddr, therfor these hacks aren't
required anymore.
