[AArch64] Enable Address Sanitizer.

2014-09-26  Christophe Lyon  <christophe.lyon@linaro.org>

	[AArch64] Enable Address Sanitizer.

	gcc/
	* config/aarch64/aarch64-linux.h (ASAN_CC1_SPEC): Define.
        (CC1_SPEC): Define.
        * config/aarch64/aarch64.c (aarch64_asan_shadow_offset): New function.
        (TARGET_ASAN_SHADOW_OFFSET): Define.

	libsanitzer/
	* configure.tgt: Enable build on aarch64*-linux.

From-SVN: r215642

gcc/ChangeLog

+2014-09-26  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* config/aarch64/aarch64-linux.h (ASAN_CC1_SPEC): Define.
+        (CC1_SPEC): Define.
+        * config/aarch64/aarch64.c (aarch64_asan_shadow_offset): New function.
+        (TARGET_ASAN_SHADOW_OFFSET): Define.
+
 2014-09-26  Martin Liska  <mliska@suse.cz>
 
 	* cgraph.c (cgraph_node::release_body): New argument keep_arguments

gcc/config/aarch64/aarch64-linux.h

@@ -23,6 +23,12 @@
 
 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-aarch64%{mbig-endian:_be}%{mabi=ilp32:_ilp32}.so.1"
 
+#undef  ASAN_CC1_SPEC
+#define ASAN_CC1_SPEC "%{%:sanitize(address):-funwind-tables}"
+
+#undef  CC1_SPEC
+#define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC
+
 #define CPP_SPEC "%{pthread:-D_REENTRANT}"
 
 #define LINUX_TARGET_LINK_SPEC  "%{h*}		\

gcc/config/aarch64/aarch64.c

@@ -9777,6 +9777,14 @@ aarch64_expand_movmem (rtx *operands)
   return true;
 }
 
+/* Implement the TARGET_ASAN_SHADOW_OFFSET hook.  */
+
+static unsigned HOST_WIDE_INT
+aarch64_asan_shadow_offset (void)
+{
+  return (HOST_WIDE_INT_1 << 36);
+}
+
 #undef TARGET_ADDRESS_COST
 #define TARGET_ADDRESS_COST aarch64_address_cost
 
@@ -10023,6 +10031,9 @@ aarch64_expand_movmem (rtx *operands)
 #undef TARGET_CALL_FUSAGE_CONTAINS_NON_CALLEE_CLOBBERS
 #define TARGET_CALL_FUSAGE_CONTAINS_NON_CALLEE_CLOBBERS true
 
+#undef TARGET_ASAN_SHADOW_OFFSET
+#define TARGET_ASAN_SHADOW_OFFSET aarch64_asan_shadow_offset
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 #include "gt-aarch64.h"

libsanitizer/ChangeLog

+2014-09-26  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* configure.tgt: Enable build on aarch64*-linux.
+
 2014-09-19  Kostya Serebryany  <kcc@google.com>
 
 	* All source files: Merge from upstream r218156.

libsanitizer/configure.tgt

@@ -35,6 +35,8 @@ case "${target}" in
 	;;
   arm*-*-linux*)
 	;;
+  aarch64*-*-linux*)
+	;;
   x86_64-*-darwin[1]* | i?86-*-darwin[1]*)
 	TSAN_SUPPORTED=no
 	;;