push x64 non-volatile registers from current thread on win32
From dd1d2fb3d6973a3d3a4e6e9de81b15204ada238e Mon Sep 17 00:00:00 2001
From: Zoltan Varga <vargaz@gmail.com>
Date: Mon, 5 Jul 2010 23:02:55 +0000
Subject: [PATCH] 2010-07-06  Zoltan Varga  <vargaz@gmail.com>

        * mini-amd64.h mini-amd64.c tramp-amd64.c aot-compiler.c: Change the IMT
        register to be the same as the RGCTX register, the two can't be used together on
        the same call.

svn path=/trunk/mono/; revision=159928
From 978e4ebbd66b231fa6e4f8b32451b87d447bfcf2 Mon Sep 17 00:00:00 2001
From: Zoltan Varga <vargaz@gmail.com>
Date: Thu, 2 Jun 2011 23:40:02 +0200
Subject: [PATCH] Fix NOMAP32BIT support in specific trampolines.
accurate check for 32-bit relative call on amd64
set MONO_ARCH_NOMAP32BIT on windows amd64