Patchwork PR libjava/53973: Check and and skip 67h address size prefix for x32

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Submitter H.J. Lu
Date July 18, 2012, 5:58 p.m.
Message ID <CAMe9rOrDemTWUeWwFJMTO5_FibE=cc4nyjaY_S13yaP2kpSPUw@mail.gmail.com>
Download mbox | patch
Permalink /patch/171772/
State New
Headers show

Comments

H.J. Lu - July 18, 2012, 5:58 p.m.
On Wed, Jul 18, 2012 at 10:47 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Wed, Jul 18, 2012 at 7:34 PM, Andrew Haley <aph@redhat.com> wrote:
>> On 07/18/2012 05:30 PM, H.J. Lu wrote:
>>> 2012-07-16  H.J. Lu  <hongjiu.lu@intel.com>
>>>
>>>       PR libjava/53973
>>>       * include/x86_64-signal.h (CHECK_67H_PREFIX): New.
>>>       (HANDLE_DIVIDE_OVERFLOW): Check and and skip 67h address size
>>>       prefix if CHECK_67H_PREFIX is 1.  Use ULL suffix for 64-bit
>>>       integer.
>>
>> OK.  I would have thought it was OK to skip the 67h address size
>> whether or not it was x32, though.
>
> You can just skip the prefix unconditionally.
>
> Uros.

I will check in this patch shortly.

Thanks.

Patch

diff --git a/libjava/include/x86_64-signal.h b/libjava/include/x86_64-signal.h
index 84907c3..aa5a903 100644
--- a/libjava/include/x86_64-signal.h
+++ b/libjava/include/x86_64-signal.h
@@ -21,12 +21,6 @@  details.  */
 #define HANDLE_SEGV 1
 #define HANDLE_FPE 1

-#ifdef __ILP32__
-# define CHECK_67H_PREFIX 1
-#else
-# define CHECK_67H_PREFIX 0
-#endif
-
 #define SIGNAL_HANDLER(_name)					\
 static void _Jv_##_name (int, siginfo_t *,			\
 			 void *_p __attribute__ ((__unused__)))
@@ -53,8 +47,8 @@  do								\
 									\
   bool _is_64_bit = false;						\
 									\
-  /* Check and skip 67h address size prefix if needed.  */		\
-  if (CHECK_67H_PREFIX && _rip[0] == 0x67)				\
+  /* Check and skip 67h address size prefix.  */			\
+  if (_rip[0] == 0x67)							\
     _rip++;								\
 									\