From 46a38bdab1a4d9f578a368705a9e3e144fd81189 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 6 Apr 2022 00:47:25 +0300
Subject: [PATCH] drc: prevent people from using lightrec on arm

Can specify ALLOW_LIGHTREC_ON_ARM=1 if you want it that much.
---
 Makefile.libretro             | 5 +++++
 libpcsxcore/lightrec/plugin.c | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/Makefile.libretro b/Makefile.libretro
index 4c60462c..066da82a 100644
--- a/Makefile.libretro
+++ b/Makefile.libretro
@@ -66,6 +66,7 @@ else ifneq (,$(findstring CortexA73_G12B,$(platform)))
 	fpic := -fPIC
 	SHARED := -shared -Wl,-version-script=link.T
 	ARCH = arm64
+	DYNAREC ?= ari64
 	CFLAGS += -fomit-frame-pointer -ffast-math -DARM
 	CPUFLAGS += -march=armv8-a+crc -mfpu=neon-fp-armv8 -mcpu=cortex-a73 -mtune=cortex-a73.cortex-a53
 
@@ -198,6 +199,7 @@ else ifeq ($(platform), libnx)
 else ifeq ($(platform), arm64)
    TARGET := $(TARGET_NAME)_libretro.so
    ARCH := arm64
+   DYNAREC = ari64
    BUILTIN_GPU = unai
    fpic := -fPIC
    CFLAGS := $(filter-out -O2, $(CFLAGS))
@@ -501,6 +503,9 @@ endif
 ifeq ($(NO_UNDEF_CHECK)$(shell ld -v 2> /dev/null | awk '{print $$1}'),GNU)
 MAIN_LDFLAGS += -Wl,--no-undefined
 endif
+ifdef ALLOW_LIGHTREC_ON_ARM
+CFLAGS += -DALLOW_LIGHTREC_ON_ARM
+endif
 
 TARGET ?= libretro.so
 PLATFORM = libretro
diff --git a/libpcsxcore/lightrec/plugin.c b/libpcsxcore/lightrec/plugin.c
index 99d71756..d042fc4f 100644
--- a/libpcsxcore/lightrec/plugin.c
+++ b/libpcsxcore/lightrec/plugin.c
@@ -15,6 +15,10 @@
 
 #include "../frontend/main.h"
 
+#if (defined(__arm__) || defined(__aarch64__)) && !defined(ALLOW_LIGHTREC_ON_ARM)
+#error "Lightrec should not be used on ARM (please specify DYNAREC=ari64 to make)"
+#endif
+
 #define ARRAY_SIZE(x) (sizeof(x) ? sizeof(x) / sizeof((x)[0]) : 0)
 
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-- 
2.39.5