[fpc-devel] Windows for AArch64

[J. Gareth Moreton]

Hopefully the first issue has now been resolved, although it may require 
refactoring later.

https://gitlab.com/freepascal.org/fpc/source/-/merge_requests/691

The main issue is that, for some reason, trying to dereference from a 
code section instead of a data section raises an access violation, 
although I'm not sure if it's a permissions issue or a subtle fault with 
the pointers.  This may require refactoring later on or if bugs manifest 
in larger projects.

Kit

On 26/05/2024 21:33, J. Gareth Moreton via fpc-devel wrote:
>
> Thank you for all your assistance with this Sven.
>
> One trick I have been doing is writing equivalent programs in C/C++ to 
> see how Clang and MSVC convert them into equivalent assembly 
> language.  It's providing some insights at least in regards to what 
> works.  My first attempted fix (putting the jump table in the same 
> section as the actual code) unfortunately didn't work, so it's 
> something more subtle.
>
> Kit
>
> On 26/05/2024 11:55, Sven Barth via fpc-devel wrote:
>> J. Gareth Moreton via fpc-devel <fpc-devel at lists.freepascal.org> 
>> schrieb am Sa., 25. Mai 2024, 22:18:
>>
>>     Indeed - I'm not giving up!  I installed Clang via LLVM.  Which
>>     of the EXE files is actually the assembler?  It's not entirely
>>     clear (no "clang-as", for example).  (Although I trust it works!)
>>
>>
>> Simply check what FPC calls. ;)
>>
>>     I've got some ideas as to how to start debugging. I will solve
>>     this puzzle!
>>
>> There is a tool that converts DWARF to CodeView, you can use that to 
>> debug with WinDBG.
>>
>> Regards,
>> Sven
>>
>>
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