* config/arm/lib1funcs.asm (__clear_cache): Define if

	L_clear_cache.
	* config/arm/linux-eabi.h (CLEAR_INSN_CACHE): Define to give an
	error if used.
	* config/arm/t-linux-eabi (LIB1ASMFUNCS): Add _clear_cache.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@147956 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 27 insertions, 14 deletions

diff --git a/gcc/config/arm/lib1funcs.asm b/gcc/config/arm/lib1funcs.asm
index b1f2bcc74b9..cc5b94e91fe 100644
--- a/gcc/config/arm/lib1funcs.asm
+++ b/gcc/config/arm/lib1funcs.asm
@@ -1096,6 +1096,27 @@ LSYM(Lover12):
 	FUNC_END div0
 	
 #endif /* L_dvmd_lnx */
+#ifdef L_clear_cache
+#if defined __ARM_EABI__ && defined __linux__
+@ EABI GNU/Linux call to cacheflush syscall.
+	FUNC_START clear_cache
+	push	{r7}
+#if __ARM_ARCH__ >= 7 || defined(__ARM_ARCH_6T2__)
+	movw	r7, #2
+	movt	r7, #0xf
+#else
+	mov	r7, #0xf0000
+	add	r7, r7, #2
+#endif
+	mov	r2, #0
+	swi	0
+	pop	{r7}
+	RET
+	FUNC_END clear_cache
+#else
+#error "This is only for ARM EABI GNU/Linux"
+#endif
+#endif /* L_clear_cache */
 /* ------------------------------------------------------------------------ */
 /* Dword shift operations.  */
 /* All the following Dword shift variants rely on the fact that
diff --git a/gcc/config/arm/linux-eabi.h b/gcc/config/arm/linux-eabi.h
index 4174d70db4d..85410c09fa4 100644
--- a/gcc/config/arm/linux-eabi.h
+++ b/gcc/config/arm/linux-eabi.h
@@ -72,16 +72,8 @@
    do not use -lfloat.  */
 #undef LIBGCC_SPEC
 
-/* Clear the instruction cache from `beg' to `end'.  This makes an
-   inline system call to SYS_cacheflush.  */
+/* Clear the instruction cache from `beg' to `end'.  This is
+   implemented in lib1funcs.asm, so ensure an error if this definition
+   is used.  */
 #undef  CLEAR_INSN_CACHE
-#define CLEAR_INSN_CACHE(BEG, END)					\
-{									\
-  register unsigned long _beg __asm ("a1") = (unsigned long) (BEG);	\
-  register unsigned long _end __asm ("a2") = (unsigned long) (END);	\
-  register unsigned long _flg __asm ("a3") = 0;				\
-  register unsigned long _scno __asm ("r7") = 0xf0002;			\
-  __asm __volatile ("swi 0		@ sys_cacheflush"		\
-		    : "=r" (_beg)					\
-		    : "0" (_beg), "r" (_end), "r" (_flg), "r" (_scno));	\
-}
+#define CLEAR_INSN_CACHE(BEG, END) not used
diff --git a/gcc/config/arm/t-linux-eabi b/gcc/config/arm/t-linux-eabi
index ebd177bf7f5..b8a5ce04e65 100644
--- a/gcc/config/arm/t-linux-eabi
+++ b/gcc/config/arm/t-linux-eabi
@@ -24,8 +24,8 @@ TARGET_LIBGCC2_CFLAGS = -fPIC
 MULTILIB_OPTIONS	=
 MULTILIB_DIRNAMES	=
 
-# Use a version of div0 which raises SIGFPE.
-LIB1ASMFUNCS := $(filter-out _dvmd_tls,$(LIB1ASMFUNCS)) _dvmd_lnx
+# Use a version of div0 which raises SIGFPE, and a special __clear_cache.
+LIB1ASMFUNCS := $(filter-out _dvmd_tls,$(LIB1ASMFUNCS)) _dvmd_lnx _clear_cache
 
 # Multilib the standard Linux files.  Don't include crti.o or crtn.o,
 # which are provided by glibc.