Re: [RFC][V2] RISC-V: Support -mcmodel=large.

[Jeff Law <jeffreyalaw@gmail.com>]

On 12/20/23 11:05, Palmer Dabbelt wrote:
> On Wed, 20 Dec 2023 09:55:48 PST (-0800), jeffreyalaw@gmail.com wrote:
>>
>>
>> On 12/18/23 00:46, KuanLin Chen wrote:
>>> Hi Jeff,
>>>
>>> Sorry for this missing.
>>> I've removed riscv_asm_output_pool_epilogue because the pool
>>> beginning is always aligned from FUNCTION_BOUNDARY.
>>> Please find attached. Thank you.
>> Thanks. I regression tested this on rv64gc without any issues and fixed
>> up the ChangeLog a bit.  Pushed to the trunk.  Thanks for your patience.
> 
> Looks like the psABI PR is still open 
> <https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/388>?
> 
> I guess there's no hard psABI dependency here, we're just doing constant 
> pools so there's no new assembler/linker stuff that's strictly 
> necessary.  I'm fine just ignoring the psABI as it's a pretty miserable 
> place to try and get things done, we're started doing that where we can 
> elsewhere as well.
Yea, the implementation relies largely on just pushing stuff into the 
constant pool, so we're largely independent ABI stuff with the likely 
exception being relocations.

In theory (and I did not test this), it should be possible to use large 
code model codegen in a smaller mode and it should interoperate.  I 
seriously pondered doing that as an additional test, then figured I had 
other higher priority items on my list.



> 
> So maybe we should just close that PR?
I'll let Kito chime in on that.

jeff