From b37c639ee018ef6403859952fd459fe8073313d3 Mon Sep 17 00:00:00 2001
From: Justin Weiss
Date: Mon, 24 Feb 2020 17:47:14 -0800
Subject: Fix dynarec crashes on 3DS

After the dynarec writes new instructions, it has to flush the
instruction and data caches. Some of these flush operations are
privileged on the 3DS, so the clear cache functions have to run
through svcBackdoor. The Nintendo implementation (and CFW
reimplementation) of svcBackdoor has a problem where interrupts and
context switches will cause crashes.

Even though we can disable interrupts in the flush function, there's
still a window of time between svcBackdoor being called and the
function being run where an interrupt will corrupt the stack.

Luma3DS implemements a svcCustomBackdoor call we can use that also
runs a function in supervisor mode, but uses an implementation that
avoids this problem.
---
 Makefile.libretro | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Makefile.libretro')

diff --git a/Makefile.libretro b/Makefile.libretro
index 133ee6d..d9b528a 100644
--- a/Makefile.libretro
+++ b/Makefile.libretro
@@ -213,6 +213,8 @@ else ifeq ($(platform), ctr)
 	CFLAGS += -Ifrontend/3ds
 	CFLAGS += -Werror=implicit-function-declaration
 
+	OBJS += frontend/3ds/utils.o
+
 #	CFLAGS += -DPCSX
 	BUILTIN_GPU = unai
 	DYNAREC = ari64
-- 
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