PATCH [8/n]: Prepare x32: PR other/48007: Unwind library doesn't work with UNITS_PER_WORD > sizeof (void *)
H.J. Lu
hjl.tools@gmail.com
Mon Jun 27 03:17:00 GMT 2011
On Sun, Jun 26, 2011 at 2:45 PM, Jason Merrill <jason@redhat.com> wrote:
> On 06/26/2011 04:06 PM, H.J. Lu wrote:
>>
>> I added a short paragraph in the updated patch:
>>
>> +@defmac UNIQUE_UNWIND_CONTEXT
>> +
>> +Define this macro if the target only supports single unqiue unwind
>> +context. The default is to support multiple unwind contexts.
>
> I saw that. I don't know what it means.
>
The current unwind library scheme provides only one unwind
context and is backward compatible with multiple different unwind
contexts from multiple unwind libraries:
http://gcc.gnu.org/ml/gcc-patches/2006-12/msg01769.html
My patch fixes UNITS_PER_WORD > sizeof (void *) and
enforces single unwind context when backward compatibility
isn't needed.
--
H.J.
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