[AArch64] LINK_SPEC changes for Cortex-A53 erratum 835769 workaround

     * config/aarch64/aarch64-elf-raw.h (CA53_ERR_835769_SPEC): Define.
     (LINK_SPEC): Include CA53_ERR_835769_SPEC.
     * config/aarch64/aarch64-linux.h (CA53_ERR_835769_SPEC): Define.
     (LINK_SPEC): Include CA53_ERR_835769_SPEC.

From-SVN: r216639

gcc/ChangeLog

 2014-10-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
+	* config/aarch64/aarch64-elf-raw.h (CA53_ERR_835769_SPEC): Define.
+	(LINK_SPEC): Include CA53_ERR_835769_SPEC.
+	* config/aarch64/aarch64-linux.h (CA53_ERR_835769_SPEC): Define.
+	(LINK_SPEC): Include CA53_ERR_835769_SPEC.
+
+2014-10-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
 	* config/aarch64/aarch64.h (ADJUST_INSN_LENGTH): Wrap definition in
 	do while (0).
 	* config/aarch64/aarch64.c (is_mem_p): Delete.

gcc/config/aarch64/aarch64-elf-raw.h

@@ -27,9 +27,18 @@
   " crtend%O%s crtn%O%s " \
   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
 
+#ifdef TARGET_FIX_ERR_A53_835769_DEFAULT
+#define CA53_ERR_835769_SPEC \
+  " %{!mno-fix-cortex-a53-835769:--fix-cortex-a53-835769}"
+#else
+#define CA53_ERR_835769_SPEC \
+  " %{mfix-cortex-a53-835769:--fix-cortex-a53-835769}"
+#endif
+
 #ifndef LINK_SPEC
 #define LINK_SPEC "%{mbig-endian:-EB} %{mlittle-endian:-EL} -X \
-  -maarch64elf%{mabi=ilp32*:32}%{mbig-endian:b}"
+  -maarch64elf%{mabi=ilp32*:32}%{mbig-endian:b}" \
+  CA53_ERR_835769_SPEC
 #endif
 
 #endif /* GCC_AARCH64_ELF_RAW_H */

gcc/config/aarch64/aarch64-linux.h

@@ -41,7 +41,16 @@
    %{mbig-endian:-EB} %{mlittle-endian:-EL}     \
    -maarch64linux%{mabi=ilp32:32}%{mbig-endian:b}"
 
-#define LINK_SPEC LINUX_TARGET_LINK_SPEC
+#ifdef TARGET_FIX_ERR_A53_835769_DEFAULT
+#define CA53_ERR_835769_SPEC \
+  " %{!mno-fix-cortex-a53-835769:--fix-cortex-a53-835769}"
+#else
+#define CA53_ERR_835769_SPEC \
+  " %{mfix-cortex-a53-835769:--fix-cortex-a53-835769}"
+#endif
+
+#define LINK_SPEC LINUX_TARGET_LINK_SPEC \
+                  CA53_ERR_835769_SPEC
 
 #define GNU_USER_TARGET_MATHFILE_SPEC \
   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"