[PATCH RFC] backends: Add RISC-V object attribute printing

[Martin Liška]

@Andreas: Can you take a look?

Martin

On 2/22/23 23:56, Mark Wielaard wrote:
> Hi,
> 
> On Fri, Nov 25, 2022 at 05:29:19PM +0100, Martin Liška wrote:
>> On 10/13/22 16:53, Mark Wielaard wrote:
>>> On Wed, 2022-08-10 at 11:27 +0200, Andreas Schwab via Elfutils-devel
>>> wrote:
>>>> This does not work yet.  The RISC-V attribute tags use the same
>>>> convention as the GNU attributes: odd numbered tags take a string
>>>> value,
>>>> even numbered ones an integer value, but print_attributes assumes the
>>>> ARM numbering scheme by default for non-GNU attributes.
>>>
>>> Yeah, I see this comment in print_attributes:
>>>
>>>          /* GNU style tags have either a uleb128 value,
>>>             when lowest bit is not set, or a string
>>>             when the lowest bit is set.
>>>             "compatibility" (32) is special.  It has
>>>             both a string and a uleb128 value.  For
>>>             non-gnu we assume 6 till 31 only take ints.
>>>             XXX see arm backend, do we need a separate
>>>             hook?  */
>>>
>>> Maybe we need a flag in the backend to tell whether attributes follow
>>> the "gnu_vendor" convention? So that could be checked at:
>>>
>>>           bool gnu_vendor = (q - name == sizeof "gnu"
>>>                              && !memcmp (name, "gnu", sizeof "gnu"));
>>>           gnu_vendor |= ebl->has_gnu_attributes;
>>>
>>> Or something similar?
>>
>> Andreas: Can you please take a look at this?
> 
> Has anybody had time to look at this?
> 
> Thanks,
> 
> Mark