Re: [PATCH v2] RISC-V: Fix IFUNC resolver cannot access gp pointer

[Florian Weimer <fweimer@redhat.com>]

* Yangyu Chen:

>> On Oct 31, 2024, at 18:32, Florian Weimer <fweimer@redhat.com> wrote:
>> 
>> * Yangyu Chen:
>> 
>>> I proposed an idea to bypass the GP initialization by restricting
>>> the use of the norelax attribute for all callees of IFUNC. In this
>>> case, the linker will retain auipc + load/store instructions to
>>> access global variables based on pc-relative address mode instead
>>> of relaxing them to a single load/store at a +- 2KB offset from the
>>> GP.
>> 
>> What do you mean by “all callees of IFUNC”?  This issue only affects the
>> resolver, not the IFUNC implementation itself.
>
> Oh… I mean the IFUNC resolver generated by compilers for target_clones
> feature, which is under the control of the compiler.

Ah, right, for compiler-generated resolvers for target clones, this is
indeed easier to accomplish.

Thanks,
Florian