llvm dev - Nov 2014 - [LLVMdev] [lld][ELF] How to transfer st_other field value from input to output file

Hi,

On MIPS st_other field in the ELF symbols table might contain some
additional MIPS-specific flags besides visibility ones. These flags
should be copied to the output linked file. If YAML => Native
conversion is switched off, there is no problem. But in case of the
conversion we lose st_other field values.

So I need an advice how to keep this information. Is it a good idea to
extend YAML and Native format to store these data? Is there any
alternative solutions?

Thanks.

-- 
Simon Atanasyan

One way to do that is to add new visibility / contentTypes (whatever is 
relevant) added for each of the values st_other picks ?

What are the other values st_other can take on MIPS ?

Shankar Easwaran

On 11/6/2014 8:50 AM, Simon Atanasyan wrote:
> Hi,
>
> On MIPS st_other field in the ELF symbols table might contain some
> additional MIPS-specific flags besides visibility ones. These flags
> should be copied to the output linked file. If YAML => Native
> conversion is switched off, there is no problem. But in case of the
> conversion we lose st_other field values.
>
> So I need an advice how to keep this information. Is it a good idea to
> extend YAML and Native format to store these data? Is there any
> alternative solutions?
>
> Thanks.
>

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the
Linux Foundation

STO_MIPS16 and STO_MICROMIPS flags denote that the symbol use a
different "compressed" instructions encoding. Both these flags can be
combined with usual "visibility" flags.

It looks like adding new flag into the contentTypes set might solve
the problem. Thanks for the idea. I try to implement it.

On Thu, Nov 6, 2014 at 6:52 PM, Shankar Easwaran
<shankare at codeaurora.org> wrote:
> One way to do that is to add new visibility / contentTypes (whatever is
> relevant) added for each of the values st_other picks ?
>
> What are the other values st_other can take on MIPS ?
>
> Shankar Easwaran
>
>
> On 11/6/2014 8:50 AM, Simon Atanasyan wrote:
>>
>> Hi,
>>
>> On MIPS st_other field in the ELF symbols table might contain some
>> additional MIPS-specific flags besides visibility ones. These flags
>> should be copied to the output linked file. If YAML => Native
>> conversion is switched off, there is no problem. But in case of the
>> conversion we lose st_other field values.
>>
>> So I need an advice how to keep this information. Is it a good idea to
>> extend YAML and Native format to store these data? Is there any
>> alternative solutions?
-- 
Simon Atanasyan