From 992322039d5d25fd51f109ad2c04def88b0bdcf8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zolt=C3=A1n=20Herczeg?= <hzmester@freemail.hu>
Date: Wed, 6 Apr 2016 07:18:42 +0000
Subject: [PATCH] Support Android ARM64 cacheflush in JIT. Patch by Tavian
 Barnes.

---
 src/sljit/sljitConfigInternal.h     | 16 ++++++++++++++++
 src/sljit/sljitNativePPC_common.c   |  4 ++++
 src/sljit/sljitNativeSPARC_common.c |  4 ++++
 3 files changed, 24 insertions(+)

diff --git a/src/sljit/sljitConfigInternal.h b/src/sljit/sljitConfigInternal.h
index f2ef022..9275b14 100644
--- a/src/sljit/sljitConfigInternal.h
+++ b/src/sljit/sljitConfigInternal.h
@@ -279,6 +279,15 @@
 /* Instruction cache flush. */
 /****************************/
 
+#if (!defined SLJIT_CACHE_FLUSH && defined __has_builtin)
+#if __has_builtin(__builtin___clear_cache)
+
+#define SLJIT_CACHE_FLUSH(from, to) \
+	__builtin___clear_cache((char*)from, (char*)to)
+
+#endif /* __has_builtin(__builtin___clear_cache) */
+#endif /* (!defined SLJIT_CACHE_FLUSH && defined __has_builtin) */
+
 #ifndef SLJIT_CACHE_FLUSH
 
 #if (defined SLJIT_CONFIG_X86 && SLJIT_CONFIG_X86)
@@ -295,6 +304,11 @@
 #define SLJIT_CACHE_FLUSH(from, to) \
 	sys_icache_invalidate((char*)(from), (char*)(to) - (char*)(from))
 
+#elif (defined(__GNUC__) && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))
+
+#define SLJIT_CACHE_FLUSH(from, to) \
+	__builtin___clear_cache((char*)from, (char*)to)
+
 #elif defined __ANDROID__
 
 /* Android lacks __clear_cache; instead, cacheflush should be used. */
@@ -307,12 +321,14 @@
 /* The __clear_cache() implementation of GCC is a dummy function on PowerPC. */
 #define SLJIT_CACHE_FLUSH(from, to) \
 	ppc_cache_flush((from), (to))
+#define SLJIT_CACHE_FLUSH_OWN_IMPL 1
 
 #elif (defined SLJIT_CONFIG_SPARC_32 && SLJIT_CONFIG_SPARC_32)
 
 /* The __clear_cache() implementation of GCC is a dummy function on Sparc. */
 #define SLJIT_CACHE_FLUSH(from, to) \
 	sparc_cache_flush((from), (to))
+#define SLJIT_CACHE_FLUSH_OWN_IMPL 1
 
 #else
 
diff --git a/src/sljit/sljitNativePPC_common.c b/src/sljit/sljitNativePPC_common.c
index b213129..a364732 100644
--- a/src/sljit/sljitNativePPC_common.c
+++ b/src/sljit/sljitNativePPC_common.c
@@ -46,6 +46,8 @@ typedef sljit_u32 sljit_ins;
 #define SLJIT_PASS_ENTRY_ADDR_TO_CALL 1
 #endif
 
+#if (defined SLJIT_CACHE_FLUSH_OWN_IMPL && SLJIT_CACHE_FLUSH_OWN_IMPL)
+
 static void ppc_cache_flush(sljit_ins *from, sljit_ins *to)
 {
 #ifdef _AIX
@@ -87,6 +89,8 @@ static void ppc_cache_flush(sljit_ins *from, sljit_ins *to)
 #endif /* _AIX */
 }
 
+#endif /* (defined SLJIT_CACHE_FLUSH_OWN_IMPL && SLJIT_CACHE_FLUSH_OWN_IMPL) */
+
 #define TMP_REG1	(SLJIT_NUMBER_OF_REGISTERS + 2)
 #define TMP_REG2	(SLJIT_NUMBER_OF_REGISTERS + 3)
 #define TMP_REG3	(SLJIT_NUMBER_OF_REGISTERS + 4)
diff --git a/src/sljit/sljitNativeSPARC_common.c b/src/sljit/sljitNativeSPARC_common.c
index ec4656f..f3a33a1 100644
--- a/src/sljit/sljitNativeSPARC_common.c
+++ b/src/sljit/sljitNativeSPARC_common.c
@@ -33,6 +33,8 @@ SLJIT_API_FUNC_ATTRIBUTE const char* sljit_get_platform_name(void)
    Both for sparc-32 and sparc-64 */
 typedef sljit_u32 sljit_ins;
 
+#if (defined SLJIT_CACHE_FLUSH_OWN_IMPL && SLJIT_CACHE_FLUSH_OWN_IMPL)
+
 static void sparc_cache_flush(sljit_ins *from, sljit_ins *to)
 {
 #if defined(__SUNPRO_C) && __SUNPRO_C < 0x590
@@ -82,6 +84,8 @@ static void sparc_cache_flush(sljit_ins *from, sljit_ins *to)
 #endif
 }
 
+#endif /* (defined SLJIT_CACHE_FLUSH_OWN_IMPL && SLJIT_CACHE_FLUSH_OWN_IMPL) */
+
 /* TMP_REG2 is not used by getput_arg */
 #define TMP_REG1	(SLJIT_NUMBER_OF_REGISTERS + 2)
 #define TMP_REG2	(SLJIT_NUMBER_OF_REGISTERS + 3)