[PATCH] Be prepared for DWARF4 .debug_frame (and .eh_frame) format

[Jason Merrill]

On 04/20/2010 12:53 PM, Jakub Jelinek wrote:
>>>>> +      if (aug[0] != 'z')
>>>>> +	       p += sizeof (void *);
>>>>
>> I still don't understand what that's trying to skip.  What is "g++
>> v2 pointer"?  If there is any EH information it comes after the RA
>> column, not immediately after the augmentation string.
>
> If augmentation is "eh", then the header has:
> uword length
> sword cie_id
> ubyte version
> string "eh"
> pointer eh_ptr

Ah.  When/where is such an augmentation generated?  Is this just a 
backwards compatibility thing?  In any case handling of this case should 
check for an augmentation string of "eh", not assume that anything that 
doesn't start with 'z' is "eh".

Jason