Attempt prep work for 64 bit just in case.

If SDL2 fails, someone (not me) will have to try to
keep these updated.

Xcode/stepmania.xcodeproj/project.pbxproj

@@ -8645,7 +8645,6 @@
 				CONFIGURATION_BUILD_DIR = "$(BUILD_DIR)/$(CONFIGURATION)";
 				FPM = "";
 				"FPM[arch=i386]" = FPM_INTEL;
-				"FPM[arch=ppc]" = FPM_PPC;
 				GCC_MODEL_TUNING = G5;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"HAVE_ASSERT_H=1",
@@ -8678,7 +8677,6 @@
 				CONFIGURATION_BUILD_DIR = "$(BUILD_DIR)/$(CONFIGURATION)";
 				FPM = "";
 				"FPM[arch=i386]" = FPM_INTEL;
-				"FPM[arch=ppc]" = FPM_PPC;
 				GCC_MODEL_TUNING = G5;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"HAVE_ASSERT_H=1",
@@ -8711,7 +8709,6 @@
 				CONFIGURATION_BUILD_DIR = "$(BUILD_DIR)/$(CONFIGURATION)";
 				FPM = "";
 				"FPM[arch=i386]" = FPM_INTEL;
-				"FPM[arch=ppc]" = FPM_PPC;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_MODEL_TUNING = G5;
 				GCC_PREPROCESSOR_DEFINITIONS = (

src/arch/ArchHooks/ArchHooks_MacOSX.cpp

@@ -129,10 +129,10 @@ void ArchHooks_MacOSX::Init()
 
 RString ArchHooks_MacOSX::GetArchName() const
 {
-#if defined(__ppc__)
+#if defined(__i386__)
-	return "Mac OS X (ppc)";
-#elif defined(__i386__)
 	return "Mac OS X (i386)";
+#elif defined(__x86_64__)
+	return "Mac OS X (x86_64)";
 #else
 #error What arch?
 #endif

src/archutils/Darwin/DarwinThreadHelpers.cpp

@@ -27,16 +27,7 @@ bool GetThreadBacktraceContext( uint64_t iID, BacktraceContext *ctx )
 	
 	thread_act_t thread = thread_act_t( iID );	
 
-#if defined(__ppc__)
+#if defined(__i386__)
-	ppc_thread_state_t state;
-	mach_msg_type_number_t count = PPC_THREAD_STATE_COUNT;
-	
-	if( thread_get_state(thread, PPC_THREAD_STATE, thread_state_t(&state), &count) )
-		return false;
-	ctx->FramePtr = (const Frame *)state.__r1;
-	ctx->PC = (void *)state.__srr0;
-	return true;
-#elif defined(__i386__)
 	i386_thread_state_t state;
 	mach_msg_type_number_t count = i386_THREAD_STATE_COUNT;
 	
@@ -46,6 +37,19 @@ bool GetThreadBacktraceContext( uint64_t iID, BacktraceContext *ctx )
 	ctx->bp = (void *)state.__ebp;
 	ctx->sp = (void *)state.__esp;
 	return true;
+#elif defined(__x86_64__)
+	x86_thread_state64_t state;
+	mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
+	
+	if (thread_get_state(thread, x86_THREAD_STATE64, thread_state_t(&state), &count))
+	{
+		return false;
+	}
+	
+	ctx->ip = (void *)state.__rip;
+	ctx->bp = (void *)state.__rbp;
+	ctx->sp = (void *)state.__rsp;
+	return true;
 #else
 	return false;
 #endif

src/archutils/Unix/Backtrace.cpp

@@ -460,10 +460,14 @@ void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc )
 	ctx->ip = (void *) uc->uc_mcontext->ss.eip;
 	ctx->bp = (void *) uc->uc_mcontext->ss.ebp;
 	ctx->sp = (void *) uc->uc_mcontext->ss.esp;
-#else
+#elif defined(__i386__)
 	ctx->ip = (void *) uc->uc_mcontext->__ss.__eip;
 	ctx->bp = (void *) uc->uc_mcontext->__ss.__ebp;
 	ctx->sp = (void *) uc->uc_mcontext->__ss.__esp;	
+#elif defined(__x86_64__)
+	ctx->ip = (void *) uc->uc_mcontext->__ss.__rip;
+	ctx->bp = (void *) uc->uc_mcontext->__ss.__rbp;
+	ctx->sp = (void *) uc->uc_mcontext->__ss.__rsp;
 #endif
 }
 
@@ -635,13 +639,8 @@ struct Frame
 
 void GetSignalBacktraceContext( BacktraceContext *ctx, const ucontext_t *uc )
 {
-#if defined(__ppc__)
-	ctx->PC = (const void *) uc->uc_mcontext->__ss.__srr0;
-	ctx->FramePtr = (const Frame *) uc->uc_mcontext->__ss.__r1;
-#else
 	ctx->PC = (const void *) uc->uc_mcontext->ss.srr0;
 	ctx->FramePtr = (const Frame *) uc->uc_mcontext->ss.r1;
-#endif
 }
 
 void InitializeBacktrace() { }