On 27 August 2015 at 12:03, Jiong Wang <jiong.w...@arm.com> wrote:
>
> Jiong Wang writes:
>>>>
>>>> Those relocation types required by tls-size 12 & 24 are supported by
>>>> binutils-2.25 already, and you have passed compilation and failed at
>>>> exectuion, so there do have something wrong I guess.
>>>>
>>>> Either the generated instruction sequence or the bare-metal environment.
>>>>
>>>> One thing strange to me is those testcases are guarded by:
>>>>
>>>> /* { dg-require-effective-target tls_native } */
>>>>
>>>> while for bare-metal environment, normally you don't have tls_native
>>>> support right? then these testcases should have been marked as
>>>> unsupported otherwise they will generate native tls instruction
>>>> sequences while the bare-metal runtime environment may don't support
>>>> initialize tp register etc, thus caused the exectuion error.
>>>>
>>>> Could you please double check this? thanks
>>>>
>>>
>>> Well, the "tls_native" check passes (there is no "emutls" string in
>>> the generated assembly).
>>> This BTW, does not involve the binutils, since it only check the
>>> assembly output.
>>>
>>> Could it be a configure error instead? (where GCC wouldn't notice that
>>> it shouldn't generate such relocations)
>>
>> to me, it's more like this. native tls is enabled on a no such support
>> platform.
>>
>> I am trying to setup a bare-metal environment for reproducing. I was
>> testing on linux environment.
>
> Finished test on my local aarch64-none-elf bare-metal. they are marked
> as unsupported correctly. gcc is doing correct configuration on my
> environment. looks like somehow gcc is doing wrong tls enable on your
> bare-metal platform.
>
I checked libgcc's configure output and it answers "no" to the
question "whether the thread-local storage support is from emutls"
What is the result in your case?
And before that 'assembler supports thread-local storage' is yes, too.
> UNSUPPORTED: gcc.target/aarch64/tlsdesc_hoist.c
> UNSUPPORTED: gcc.target/aarch64/tlsle12_1.c
> UNSUPPORTED: gcc.target/aarch64/tlsle24_1.c
> UNSUPPORTED: gcc.target/aarch64/tlsle32_1.c
> --
> Regards,
> Jiong
>
