- Get rid of ArmMemTools.cpp and rename x64MemTools.cpp to MemTools.cpp.
ArmMemTools was almost identical to the POSIX part of x64MemTools, and
the two differences, (a) lack of sigaltstack, which I added to the
latter recently, and (b) use of r10 to determine the fault address
instead of info->si_addr (meaning it only works for specifically
formatted JIT code), I don't think are necessary. (Plus Android, see
below.)
- Rename Core/PowerPC/JitCommon/JitBackpatch.h to Core/MachineContext.h.
It doesn't contain anything JIT-specific anymore, and e.g. locking
will want to use faulting support regardless of whether any JIT is in
use.
- Get rid of different definitions of SContext for different
architectures under __linux__, since this is POSIX. The exception is
of course Android being shitty; I moved the workaround definition from
ArmMemTools.cpp to here.
- Get rid of #ifdefs around EMM::InstallExceptionHandler and just
provide an empty implementation for unsupported systems (i.e.
_M_GENERIC really). Added const bool g_exception_handlers_supported
for future use; currently exception handlers are only used by the JIT,
whose use implies non-M_GENERIC, but locking will change that.
- Remove an unnecessary typedef.
