July 2004 - Darwin-kernel - lists.apple.com

Restrictions in kexts
by Krishna Monian 06 Jul '04

06 Jul '04

Hi, Is there some sort of restriction on using the following functions in a kext? FSMakeFSSPec FSpMakeFSRef FSRefMakePath Thanks __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Krishna Monian 06 Jul '04

06 Jul '04

What sort of auditing does Darwin have? I need to log even file accesses that fail, which the audting feature might not do. If you are referring to fs_usage then that doesn't suit my needs. If there is some other auditing feature could you please let me know. Thanks > What system calls are you logging? open, close? > read/write? > > Darwin 7.4 has auditing built in. > -------------------------- > Wayne Salamon > wsalamon(a)computer.org > __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Mach Thread API
by Christoph Nägeli 06 Jul '04

06 Jul '04

Hi, Is there any documentation about the Mach Thread API? There are no man pages for the functions nor is there something in the documentation that came with the developer tools nor are the header files documentated. I need to kill a thread immediatly and as far as I can see, there is no way to do it with posix threads => I thought it would be pthread_cancel but that doesn't seem to work. -- Regards Christoph _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: VM pager file allocation and deallocation
by Justin Walker 05 Jul '04

05 Jul '04

On Jul 5, 2004, at 13:42, Mark Grimes wrote: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jul 5, 2004, at 11:21, James Bucanek wrote: Greetings, We're having a spirited argument on the X-Tech list about pager file reclamation, and I have a couple of quick questions: (a) Is there a utility that will dump a detailed status of the VMM's picture of memory, including the status (and swappability) of pages in RAM as well as the status of pages currently in the backing store? None that I'm aware of. 'top' gives you a something similar to this; cf its man page. /usr/bin/vm_stat and there is also /usr/bin/vmmap for detailed pid specific memory region allocation. Thanks! These weren't available the last time I looked (which is a while now - the 10.0 time-frame :-}). Regards Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | It's not whether you win or lose... | It's whether *I* win or lose. *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: VM pager file allocation and deallocation
by Justin Walker 05 Jul '04

05 Jul '04

On Jul 5, 2004, at 11:21, James Bucanek wrote: Greetings, We're having a spirited argument on the X-Tech list about pager file reclamation, and I have a couple of quick questions: (a) Is there a utility that will dump a detailed status of the VMM's picture of memory, including the status (and swappability) of pages in RAM as well as the status of pages currently in the backing store? None that I'm aware of. 'top' gives you a something similar to this; cf its man page. (b) Is there a primer or FAQ somewhere for downloading and looking at the source for Darwin (I wouldn't want to bother anyone here for detailed instructions -- I just wanted to peek at the dynamic_pager and related source to see if I could learn anything.) <http://developer.apple.com/darwin> should provide all the help you need (including how to sign up for an Apple ID, which you will need to view/download source that is licensed under APSL). The pager is in the system_cmds project. Regards, Justin -- /~\ The ASCII Justin C. Walker, Curmudgeon-at-Large \ / Ribbon Campaign X Help cure HTML Email / \ _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Wayne Salamon 03 Jul '04

03 Jul '04

On Jul 2, 2004, at 2:38 PM, Krishna Monian wrote: > I am basically writing a IOService which reroutes > system calls so that I can log file accesses. I am > trying to copy data from the user space to kernel > space. > What system calls are you logging? open, close? read/write? Darwin 7.4 has auditing built in. -------------------------- Wayne Salamon wsalamon(a)computer.org _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Justin Walker 02 Jul '04

02 Jul '04

On Jul 2, 2004, at 13:19, Krishna Monian wrote: --- Shawn Erickson <shawn(a)freetimesw.com> wrote: On Jul 2, 2004, at 11:38 AM, Krishna Monian wrote: I am basically writing a IOService which reroutes system calls so that I can log file accesses. I am trying to copy data from the user space to kernel space. Are you doing this with a plan for a shipping product? Not exactly. Is there anything I should keep in mind if it is a shipping product? Thanks Yes. Do not reroute system calls in a shipping product. See the archives for further details, and a lot of discussion. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | Some people have a mental | horizon of radius zero, and | call it their point of view. | -- David Hilbert *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Krishna Monian 02 Jul '04

02 Jul '04

Not exactly. Is there anything I should keep in mind if it is a shipping product? Thanks --- Shawn Erickson <shawn(a)freetimesw.com> wrote: > On Jul 2, 2004, at 11:38 AM, Krishna Monian wrote: > > > I am basically writing a IOService which reroutes > > system calls so that I can log file accesses. I am > > trying to copy data from the user space to kernel > > space. > > Are you doing this with a plan for a shipping > product? > > -Shawn > _______________________________________________ > darwin-kernel mailing list | > darwin-kernel(a)lists.apple.com > Help/Unsubscribe/Archives: > http://www.lists.apple.com/mailman/listinfo/darwin-kernel > Do not post admin requests to the list. They will be > ignored. > > __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Shawn Erickson 02 Jul '04

02 Jul '04

On Jul 2, 2004, at 11:38 AM, Krishna Monian wrote: I am basically writing a IOService which reroutes system calls so that I can log file accesses. I am trying to copy data from the user space to kernel space. Are you doing this with a plan for a shipping product? -Shawn _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Passing a char** to a Kext from user mode
by Krishna Monian 02 Jul '04

02 Jul '04

I am basically writing a IOService which reroutes system calls so that I can log file accesses. I am trying to copy data from the user space to kernel space. I have got around this by replacing the char** by char*[] and then using copyinstr() to copy the strings. Thanks --- Godfrey van der Linden <gvdl(a)apple.com> wrote: > The answer for this depends totally on what space > you are operating > in:- VFS, NKE, IOKit or other? Also what are you > trying to copy from > the kernel's address space to user land? How much > data are you going > to move? > > Godfrey > > On Jul 1, , at 16:04, Krishna Monian wrote: > > > Hi, > > > > I am trying to write a kernel extension in which I > > have to pass a char** to it from a user mode > > application. > > > > Currently I have tried passing the pointer as a > scalar > > and as a struct(wrapped in a struct) to the kext. > > However this results in some weird behavior. > > > > What is the right way to pass such information to > the > > kext? > > > > Thanks > > > > __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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