[fpc-pascal] How __FPC_specific_handler() is invoked

[Matias Vara]

El mié., 25 jul. 2018 a las 14:33, Sven Barth via fpc-pascal (<
fpc-pascal at lists.freepascal.org>) escribió:

> Matias Vara <matiasevara at gmail.com> schrieb am Mi., 25. Juli 2018, 12:55:
>
>>
>> El mar., 24 jul. 2018 a las 13:57, Sven Barth via fpc-pascal (<
>> fpc-pascal at lists.freepascal.org>) escribió:
>>
>>> Matias Vara <matiasevara at gmail.com> schrieb am Di., 24. Juli 2018,
>>> 11:04:
>>>
>>>> Hello,
>>>>
>>>> I am writing my own __FPC_specific_handler() but I can't figure out
>>>> when this function is registered. I guess this function is registered to
>>>> the OS to be invoked when an exception happens. In the assembler code I
>>>> have something like:
>>>>
>>>> .seh_handler __FPC_specific_handler, at unwind
>>>>
>>>> But I am puzzled by "@unwind". How is __FPC_specific_handler() invoked
>>>>
>>>
>>> To understand the .seh_*-pseudo instructions it's probably best to look
>>> at their initial check-in in the GNU assembler:
>>> https://sourceware.org/ml/binutils/2009-08/msg00193.html
>>>
>>> The handler function is invoked by Windows when an exception happens
>>> inside the code that is governed by the surrounding (implicit)
>>> .seh_(end)proc directives.
>>>
>>> Why are you writing your own handler?
>>>
>>>
>> Thanks for the answer, I am trying to make work the exceptions handling
>> in Toro kernel. Currently Toro is based on Win64 rtl. I think I will give
>> up with the Win64 RTL and move to a simpler RTL.
>>
>
> I think I suggested some time ago already that you should use the embedded
> targets for writing a kernel. That's what they're there for after all.
>
>
You are right but I was a bit strong headed.

Thanks




> Regards,
> Sven
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