On Sun, Mar 6, 2011 at 3:23 PM, Richard Guenther
<richard.guent...@gmail.com> wrote:
> On Sun, Mar 6, 2011 at 10:28 PM, H.J. Lu <hjl.to...@gmail.com> wrote:
>> On Sun, Mar 6, 2011 at 1:15 PM, Andrew Pinski <pins...@gmail.com> wrote:
>>> On Sun, Mar 6, 2011 at 9:18 AM, H.J. Lu <hongjiu...@intel.com> wrote:
>>>> Hi,
>>>>
>>>> We shouldn't save call frame hard registers as "void *". This patch
>>>> changes the unwind library to save call frame hard registers as
>>>> _Unwind_Word. OK for 4.7?
>>>
>>> I think this will break the ABI for the MIPS N32 ABI. Not to mention
>>> the MIPS N32 ABI works fine with the unwinding part this way. Does
>>> someone use the unwinding library to look at the registers in previous
>>> stack frames?
>>
>> It may be psABI/implementation specific. X32 glibc force unwind calls
>> _Unwind_SetGRValue to get a 64bit register value.
>
> So fix it on that side?
>
How? One function in question is
/* Overwrite the saved value for register INDEX in CONTEXT with VAL. */
static inline void
_Unwind_SetGRValue (struct _Unwind_Context *context, int index,
_Unwind_Word val)
Are you saying it shouldn't be called if UNITS_PER_WORD > sizeof (void *)?
--
H.J.
