From: Max Filippov <jcmvbkbc@gmail.com>
To: gcc-patches@gcc.gnu.org
Cc: linux-xtensa@linux-xtensa.org,
Sterling Augustine <augustine.sterling@gmail.com>,
Max Filippov <jcmvbkbc@gmail.com>
Subject: [PATCH] gcc: xtensa: enable address sanitizer
Date: Mon, 04 Dec 2017 21:29:00 -0000 [thread overview]
Message-ID: <1512422933-20575-1-git-send-email-jcmvbkbc@gmail.com> (raw)
gcc/
2017-12-04 Max Filippov <jcmvbkbc@gmail.com>
* config/xtensa/xtensa.c (xtensa_asan_shadow_offset): New
function.
(TARGET_ASAN_SHADOW_OFFSET): New macro definition.
* config/xtensa/xtensa.h (FRAME_GROWS_DOWNWARD): Set to 1 if
ASAN is enabled.
---
gcc/config/xtensa/xtensa.c | 12 ++++++++++++
gcc/config/xtensa/xtensa.h | 3 ++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c
index 1e73b2f4405d..92b9a600df82 100644
--- a/gcc/config/xtensa/xtensa.c
+++ b/gcc/config/xtensa/xtensa.c
@@ -183,6 +183,7 @@ static bool xtensa_hard_regno_mode_ok (unsigned int, machine_mode);
static bool xtensa_modes_tieable_p (machine_mode, machine_mode);
static HOST_WIDE_INT xtensa_constant_alignment (const_tree, HOST_WIDE_INT);
static HOST_WIDE_INT xtensa_starting_frame_offset (void);
+static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void);
\f
@@ -325,6 +326,9 @@ static HOST_WIDE_INT xtensa_starting_frame_offset (void);
#undef TARGET_STARTING_FRAME_OFFSET
#define TARGET_STARTING_FRAME_OFFSET xtensa_starting_frame_offset
+#undef TARGET_ASAN_SHADOW_OFFSET
+#define TARGET_ASAN_SHADOW_OFFSET xtensa_asan_shadow_offset
+
struct gcc_target targetm = TARGET_INITIALIZER;
\f
@@ -4413,4 +4417,12 @@ xtensa_starting_frame_offset (void)
return crtl->outgoing_args_size;
}
+/* Implement TARGET_ASAN_SHADOW_OFFSET. */
+
+static unsigned HOST_WIDE_INT
+xtensa_asan_shadow_offset (void)
+{
+ return HOST_WIDE_INT_UC (0x10000000);
+}
+
#include "gt-xtensa.h"
diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h
index b4cf53708b3e..1602fae3d9ea 100644
--- a/gcc/config/xtensa/xtensa.h
+++ b/gcc/config/xtensa/xtensa.h
@@ -430,7 +430,8 @@ enum reg_class
#define STACK_GROWS_DOWNWARD 1
-#define FRAME_GROWS_DOWNWARD flag_stack_protect
+#define FRAME_GROWS_DOWNWARD (flag_stack_protect \
+ || (flag_sanitize & SANITIZE_ADDRESS) != 0)
/* The ARG_POINTER and FRAME_POINTER are not real Xtensa registers, so
they are eliminated to either the stack pointer or hard frame pointer. */
--
2.1.4
next reply other threads:[~2017-12-04 21:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-04 21:29 Max Filippov [this message]
2017-12-04 21:31 ` Jakub Jelinek
2017-12-04 21:34 ` Max Filippov
2017-12-05 5:37 ` augustine.sterling
2017-12-05 14:33 ` Max Filippov
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