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gcc: xtensa: enable address sanitizer

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gcc/
2017-12-05  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.

From-SVN: r255420
This commit is contained in:
Max Filippov 2017-12-05 14:17:35 +00:00 • committed by Max Filippov
parent ac550b9a0e
commit 8c9ee176a6
3 changed files with 22 additions and 1 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2017-12-05 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.
2017-12-05 Richard Biener <rguenther@suse.de>
* timevar.def (TV_TREE_RECIP, TV_TREE_SINCOS, TV_TREE_WIDEN_MUL):

12
gcc/config/xtensa/xtensa.c
View file

@ -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);
@ -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;
@ -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"

3
gcc/config/xtensa/xtensa.h
View file

@ -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. */