From 5df538cd4413979e2522b4051dbdbfc3cac88367 Mon Sep 17 00:00:00 2001
From: Ben Vanik <ben.vanik@gmail.com>
Date: Sat, 19 Oct 2013 14:16:34 -0700
Subject: [PATCH] Adding stack alignment check. We aren't 16b aligned right
 now. Fuck.

---
 src/xenia/cpu/x64/x64_emitter.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/xenia/cpu/x64/x64_emitter.cc b/src/xenia/cpu/x64/x64_emitter.cc
index ef3e27e3c..b9c6846b5 100644
--- a/src/xenia/cpu/x64/x64_emitter.cc
+++ b/src/xenia/cpu/x64/x64_emitter.cc
@@ -109,10 +109,16 @@ void X64Emitter::Unlock() {
   xe_mutex_unlock(lock_);
 }
 
+#define STACK_ALIGNMENT_CHECK 0
+
 int X64Emitter::PrepareFunction(FunctionSymbol* symbol) {
   int result_code = 1;
   Lock();
 
+#if STACK_ALIGNMENT_CHECK
+  Label l(assembler_.newLabel());
+#endif  // STACK_ALIGNMENT_CHECK
+
   if (symbol->impl_value) {
     result_code = 0;
     XESUCCEED();
@@ -137,6 +143,15 @@ int X64Emitter::PrepareFunction(FunctionSymbol* symbol) {
   // call [OnDemandCompileTrampoline]
   // jmp [rax]
 
+#if STACK_ALIGNMENT_CHECK
+  assembler_.mov(rax, rsp);
+  assembler_.and_(rax, imm(0xF));
+  assembler_.test(rax, rax);
+  assembler_.jz(l);
+  assembler_.int3();
+  assembler_.bind(l);
+#endif  // STACK_ALIGNMENT_CHECK
+
 #if defined(ASMJIT_WINDOWS)
   // Calling convetion: kX86FuncConvX64W
   // Arguments passed as RCX, RDX, R8, R9