[fpc-devel] properties with getter evaluation in gdb

[Paul Ishenin]

12.03.2010 21:55, Jonas Maebe wrote:
>
> PS: one reason that this is not advancing is because FPC does not 
> support it correctly either, and I don't want to add support for a 
> broken implementation to GDB since then it has to be changed again 
> later anyway. I also don't know of any description of the Borland 
> fastcall calling convention, so it is currently not possible to 
> properly fix this (not without guessing and probably breaking it again 
> in yet some other case). See http://bugs.freepascal.org/view.php?id=15691
What exactly needs to be known?

I found the next description in the net:

Few first arguments of fastcall that fit into a processor's register 
(i.e. with a size up to 32 bits for x86 architecture) will be passed via 
registers instead of being put onto the stack. The remaining arguments 
are passed right-to-left on the stack (like in cdecl). Return values are 
passed through the AL, AX, or EAX register. The stack is usually 
callee-cleared unless the function takes a variable number of 
parameters. Most RTL </e/r/ru/runtime_library.htm>functions, however, 
take a small number of parameters, so they don't have to clear the stack 
at all. *Borland* fastcall *convention* passes first THREE arguments via 
EAX, EDX, ECX;

If something more is required please let me know and I will search.

Best regards,
Paul Ishenin.
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