August 2006 - Darwin-dev - lists.apple.com

Re: Re: Passing too many parameters to a function?
by David Leimbach 23 Aug '06

23 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=YD9suWFCs9ceBzPVMgLrvRJYwSj36Do0LIewLW0Tf/JoqBQ/8BuLVZptJ8fQh1QFpKBXoTxhs53nj6dsIMk/YTytKMW/OgrhQr/9f32CYB+L6CclxCWD3tVi/Wg8LoLYk3W+WEFzIDuQijTvTavlr8PFoEolK8f65mtiz6XAoFo= On Aug 20, 2006, at 3:17 AM, Uli Kusterer wrote: > you know how main() can be declared with varying parameter counts, > like > > int main() > > or > > int main( int argc, const char* argv* ) > > and even more. Does this work for any function? If I pass a function > more parameters than it actually uses, is that safe with OS X's > current Mach-O ABIs? Last I knew, that was a part of the C language standard. If you use the elipsis (...) it might even compile :-). open, on Darwin/Mac OS X, employs this so it can accept variable arguments after the required ones. see /usr/src/sys/fcntl.h around line 393. And it works too. Lots of Unix APIs depends on that. Off the top of my head, the third argument of open() is optional and signal handers were originally defined to take one argument, but now they take three. Old handlers will obviously work, since they ignore the second and third arguments. Same with libc. Think "printf" :-) Cheers, davez _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/leimy2k%40gmail.com This email sent to leimy2k(a)gmail.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On 8/23/06, Dave Zarzycki <zarzycki(a)apple.com> wrote: This email sent to site_archiver(a)lists.apple.com

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Re: Passing too many parameters to a function?
by Dave Zarzycki 23 Aug '06

23 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Aug 20, 2006, at 3:17 AM, Uli Kusterer wrote: int main() or int main( int argc, const char* argv* ) Last I knew, that was a part of the C language standard. Cheers, davez _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… you know how main() can be declared with varying parameter counts, like and even more. Does this work for any function? If I pass a function more parameters than it actually uses, is that safe with OS X's current Mach-O ABIs? And it works too. Lots of Unix APIs depends on that. Off the top of my head, the third argument of open() is optional and signal handers were originally defined to take one argument, but now they take three. Old handlers will obviously work, since they ignore the second and third arguments. This email sent to site_archiver(a)lists.apple.com

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Re: Passing too many parameters to a function?
by Nat! 23 Aug '06

23 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Am 20.08.2006 um 12:20 schrieb Peter Seebach: you know how main() can be declared with varying parameter counts, like Does this work for any function? If I pass a function more parameters than it actually uses, is that safe with OS X's current Mach-O ABIs? No. Ciao Nat! ------------------------------------------------------ You know, in the Bible it doesn't say, "Waddle forth and calcify." -- DLR _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… In message <7831D65F-64DF-4203-B61B-F3677500FD0F(a)gmx.net>, Uli Kusterer writes: int main() or int main( int argc, const char* argv* ) and even more. Can you show an example, where sending a superflous parameter to a C function creates a problem with current Mach-O ABIs ? This email sent to site_archiver(a)lists.apple.com

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macosforge website Alluya
by almisr 23 Aug '06

23 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com :) Alleluya Thanks , for the new web design if you want some help http://plumber.gnu-darwin.org/pub/Pictures/xnu-darwin-proj.jpg Best Regards {|} _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Problem with latest xnu
by Rui Paulo 22 Aug '06

22 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Aug 20, 2006, at 12:08 AM, Rui Paulo wrote: Oops, sorry I just noticed the comments in webpage... -- Rui Paulo _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Hi. I've built xnu-792.10.96 from source and installed according to instructions found on macosforge.org. I think everything is working except for the built in ethernet card. The following shows up on dmesg: This email sent to site_archiver(a)lists.apple.com

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Re: Quicktime file Streaming (RTP using TCP interleaving)
by Justin C. Walker 21 Aug '06

21 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Aug 21, 2006, at 01:43 , Nihit Purwar wrote: Regards, Justin -- Justin C. Walker, Curmudgeon-at-Large () The ASCII Ribbon Campaign /\ Help Cure HTML Email _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Can anyone please help me out on this issue ? Not on this list. Check <http://lists.apple.com> for the lists that Apple hosts, and choose one that deals with the streaming sserver. This email sent to site_archiver(a)lists.apple.com

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Quicktime file Streaming (RTP using TCP interleaving)
by Nihit Purwar 21 Aug '06

21 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=R//30NUJWUn9CNJDVMz2AEa/pYnd0javrRdASXCsOeTOaPWIeiciC5vmv/e+brbJ6NSsg0yqde3cfZYNCI8pFMuX/u1LoDpH74zI7Vykj0EqMkpV/tv47xRZKt8JpqyIzxeTOTQfaKFhM0tksJc3bU21c3CSJNGGXySsplrH/EI= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Why does mount_hfs ignore the sync option?
by Howard Gayle 20 Aug '06

20 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com mount_hfs(8) silently ignores the sync option. Why? The kernel HFS code seems to support the IO_SYNC flag. When I modified mount_hfs to mount a file system with the MNT_SYNCHRONOUS flag, I didn't see any problems. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Passing too many parameters to a function?
by seebs＠plethora.net 20 Aug '06

20 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com In message <7831D65F-64DF-4203-B61B-F3677500FD0F(a)gmx.net>, Uli Kusterer writes: > you know how main() can be declared with varying parameter counts, >like > int main() >or > int main( int argc, const char* argv* ) >and even more. Only one more is particularly common (adding envp). >Does this work for any function? If I pass a function >more parameters than it actually uses, is that safe with OS X's >current Mach-O ABIs? No. The only thing you can safely do is call a function with the arguments it's declared with, no more, no less. (Varargs are sort of special.) Note that, if you declare main one of these ways, you can't call it the other. Why can you declare it either way? Because the startup code that calls main is specially required to know enough to be able to call it safely, somehow. -s _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Passing too many parameters to a function?
by Uli Kusterer 20 Aug '06

20 Aug '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, int main() or int main( int argc, const char* argv* ) Cheers, -- Uli http://www.zathras.de _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… you know how main() can be declared with varying parameter counts, like and even more. Does this work for any function? If I pass a function more parameters than it actually uses, is that safe with OS X's current Mach-O ABIs? I would like to have plugins in my app be prepared for a future expansion of the plugin protocol, which would require them to pass an additional parameter (that my app isn't using right now) to the callbacks they send. Since I'm gonna be releasing a new plugin SDK with the first universal version, I thought this would be a good opportunity to add this change, so that all recompiled Xes would run unchanged on the future new system and I can drop the old code that doesn't have this parameter. I trid googling for "Mach O ABI too many parameters" and stuff like that, but I just couldn't find any clues there, so if anyone knows where I can find this documented or even has an answer, that would be cool! This email sent to site_archiver(a)lists.apple.com

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