[Lazarus] PascalScript on Win x64

Martin lazarus at mfriebe.de
Tue Sep 4 14:42:21 CEST 2012

On 04/09/2012 13:24, Alexander Hofmann wrote:
> Hi there.
> This is a cross-post (cross-mail ?) to 
> http://www.lazarus.freepascal.org/index.php/topic,17978.0.html as I 
> got the hint there that it might be better to ask on the list instead 
> of in the forum, at least concerning the calling conventions - but 
> I'll ask the whole lot, anyway; I hope that's ok.
As Vincent pointed out. FPC mailinglist.

> Interestingly, when I start debugging 
> <SomeClass>.Create(aOwner:TComponent)-Type of Constructors, there is 
> some difference in the Register values, depending on whether the 
> Constructor was called from "pure" FPC-Code or the Script (at least so 
> it seems):
> o Called from FPC: rcx: 0 (nil), rdx: Class Reference, r8: Value of aOwner
> o Called from Script: rcx: Class Reference, rdx: 1 (!?), r8: Value of 
> aOwner (at least so it seems)
> Is there any difference in the calling convention on x64-Systems 
> between Delphi and Lazarus? I could only find the "standard" 
> information on Windows x64 calling conventions, without special care 
> of constructors, if there is any...

You will be able to get an answer about the calling convention fpc uses 
(They should be standard)

But you can then check yourself in x64.inc what PascalScript does.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lazarus-ide.org/pipermail/lazarus/attachments/20120904/55e4017d/attachment-0003.html>

More information about the Lazarus mailing list