diff options
Diffstat (limited to 'gcc-4.9/gcc/asan.c')
| -rw-r--r-- | gcc-4.9/gcc/asan.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/asan.c b/gcc-4.9/gcc/asan.c index 53992a81b..28a476fe4 100644 --- a/gcc-4.9/gcc/asan.c +++ b/gcc-4.9/gcc/asan.c @@ -1017,8 +1017,17 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned int alignb, base_align_bias = ((asan_frame_size + alignb - 1) & ~(alignb - HOST_WIDE_INT_1)) - asan_frame_size; } + /* Align base if target is STRICT_ALIGNMENT. */ + if (STRICT_ALIGNMENT) + base = expand_binop (Pmode, and_optab, base, + gen_int_mode (-((GET_MODE_ALIGNMENT (SImode) + << ASAN_SHADOW_SHIFT) + / BITS_PER_UNIT), Pmode), NULL_RTX, + 1, OPTAB_DIRECT); + if (use_after_return_class == -1 && pbase) emit_move_insn (pbase, base); + base = expand_binop (Pmode, add_optab, base, gen_int_mode (base_offset - base_align_bias, Pmode), NULL_RTX, 1, OPTAB_DIRECT); @@ -1097,6 +1106,8 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned int alignb, && (ASAN_RED_ZONE_SIZE >> ASAN_SHADOW_SHIFT) == 4); shadow_mem = gen_rtx_MEM (SImode, shadow_base); set_mem_alias_set (shadow_mem, asan_shadow_set); + if (STRICT_ALIGNMENT) + set_mem_align (shadow_mem, (GET_MODE_ALIGNMENT (SImode))); prev_offset = base_offset; for (l = length; l; l -= 2) { @@ -1186,6 +1197,10 @@ asan_emit_stack_protection (rtx base, rtx pbase, unsigned int alignb, shadow_mem = gen_rtx_MEM (BLKmode, shadow_base); set_mem_alias_set (shadow_mem, asan_shadow_set); + + if (STRICT_ALIGNMENT) + set_mem_align (shadow_mem, (GET_MODE_ALIGNMENT (SImode))); + prev_offset = base_offset; last_offset = base_offset; last_size = 0; |