[fpc-pascal] ppc64le ABI problem

[Jonas Maebe]

On 26/08/2019 20:54, Florian Klaempfl wrote:
> Am 26.08.2019 um 20:52 schrieb Jonas Maebe:
>> On 26/08/2019 14:22, Florian Klämpfl wrote:
>>> Am 26. August 2019 14:08:39 schrieb Sven Barth via fpc-pascal <fpc-pascal at lists.freepascal.org>:
>>>
>>>> Florian Klämpfl <florian at freepascal.org> schrieb am Mo., 26. Aug. 2019,
>>>> 14:01:
>>>>
>>>>> Try to change the 48 in fpc/compiler/powerpc64/cpupara.pas line to 32 as a
>>>>> temporary test.
>>>>
>>>> Line 302 in case anyone is wondering (thankfully that's the only "48" in
>>>> that fike (plus its preceeding comment) ^^')
>>>
>>> Indeed :-) If it works, it must be made dependent on the target ABI.
>>
>> It's indeed like that, see section 2.2.2 of
>> https://openpowerfoundation.org/wp-content/uploads/2016/03/ABI64BitOpenPOWERv1.1_16July2015_pub4.pdf
> 
> Yes, I checked the docs as well :) I don't know though why it is only 32
> for elf_abi_v2 ...

It's because the other ABIs also provide space for a compiler and
linker-specific slot:
https://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#STACK


Jonas