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

Re: compiling the kernel problems
by Felix Kronlage 23 Apr '04

23 Apr '04

On Thu, Apr 22, 2004 at 06:02:37PM -0700, Justin Walker wrote: > Shantonu has instructions on opendarwin.org's site. Search the > darwin-development list archives for mail with the subject 'Building > xnu', from June of last year. There may also be pointers at that site > (<http://www.opendarwin.org>). the most recent notes around is the 'building xnu' howto over at OpenDarwin.org. While it was written around 10.2.x (= darwin 6.6.x) it still applies for 10.3.x (darwin 7.x). The difference is, that now also the kext_tools project belongs to the toolchain (which the orgininal poster stated that he was missing). An easy way to get 'kextsymboltool' is to grab it off the darwin 7.0.1 install (it should be in /usr/local/bin). -fkr -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 Felix Kronlage | FKR-RIPE | http://www.hazardous.org/fkr/ fkr(a){bytemine.net|opendarwin.org} | http://opendarwin.org/~fkr/ [demime 0.98b removed an attachment of type application/pgp-signature] _______________________________________________ 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.

1 0

Re: compiling the kernel problems
by Justin Walker 23 Apr '04

23 Apr '04

On Apr 22, 2004, at 13:49, Nicolas Bock wrote: I am trying to compile the darwin kernel. I found some instructions as to how to do that on the developers pages, http://developer.apple.com/documentation/Darwin/Conceptual/ KernelProgramming/build/chapter_18_section_3.html#//apple_ref/doc/uid/ TP30000905-CH221-CIHFEIFI but now I am stuck. I got to the point where I am compiling the actual kernel. After issuing the command: Shantonu has instructions on opendarwin.org's site. Search the darwin-development list archives for mail with the subject 'Building xnu', from June of last year. There may also be pointers at that site (<http://www.opendarwin.org>). Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | When LuteFisk is outlawed | Only outlaws will have | LuteFisk *--------------------------------------*-------------------------------* _______________________________________________ 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.

1 0

compiling the kernel problems
by Nicolas Bock 22 Apr '04

22 Apr '04

I am trying to compile the darwin kernel. I found some instructions as to how to do that on the developers pages, http://developer.apple.com/documentation/Darwin/Conceptual/ KernelProgramming/build/chapter_18_section_3.html#//apple_ref/doc/uid/ TP30000905-CH221-CIHFEIFI but now I am stuck. I got to the point where I am compiling the actual kernel. After issuing the command: make all I end up with this error message: /usr/local/bin/kextsymboltool \ -arch ppc \ -import /Users/nbock/kernel/xnu-517.3.15/BUILD/obj/RELEASE_PPC/allsymbols \ -export /Users/nbock/kernel/xnu-517.3.15/config/System6.0.exports \ -export /Users/nbock/kernel/xnu-517.3.15/config/System6.0.ppc.exports \ -output /Users/nbock/kernel/xnu-517.3.15/BUILD/obj/RELEASE_PPC/ System6.0.symbolset; /bin/sh: line 1: /usr/local/bin/kextsymboltool: No such file or directory make[3]: *** [/Users/nbock/kernel/xnu-517.3.15/BUILD/obj/RELEASE_PPC/ System6.0.symbolset] Error 1 make[2]: *** [build_all] Error 2 make[1]: *** [build_all] Error 2 make: *** [all] Error 2 I downloaded the package "kext_tools_42", hoping that it would contain the missing command, but I can't compile it. Could someone point me in the right direction? Thanks already, nick _______________________________________________ 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.

1 0

Re: Cancelling AIO
by Jerry Cottingham 21 Apr '04

21 Apr '04

On Apr 20, 2004, at 10:00 PM, darwin-kernel-request(a)lists.apple.com wrote: 6. Cancelling AIO (Lamont Cranston) Message: 6 Date: Tue, 20 Apr 2004 12:02:23 -0700 (PDT) From: Lamont Cranston <lamontcranston41(a)yahoo.com> Subject: Cancelling AIO To: darwin-kernel(a)lists.apple.com I have the following code in a userland AIO test app to clean up file I/O and close a file: // cancel any pending aio requests. retval = aio_cancel( file, NULL ); if ( retval == AIO_NOTCANCELED ) { // Requests could not be cancelled. Go through the // AIO list and wait for completion. for( i = 0; i < aiocb_list_size; i++ ) { if ( !aiocb_list[i] ) continue; while( aio_error( aiocb_list[i] ) == EINPROGRESS ) continue; aio_return( aiocb_list[i] ); } } close( file ); ---------------------------------------- This code is common to file and raw disk I/O. I am having problems with raw disk I/O. I know that aio_cancel() does not work with raw disks (so the for loop will always execute), but does that mean I can't make the call at all? do you have a little sample application that shows this problem with raw disks? it should work fine. While running a series of AIO tests in which rdisks are opened and closed, eventually aio_read() and aio_write() begin to fail because aio_max_requests_per_process and aio_max_requests have been exceeded. I make sure that these are set to twice what I need via sysctl() calls. If I take out the aio_cancel() call and just run the for loop, everything works. For file I/O, do I need to call aio_return() even if requests are cancelled via aio_cancel() (i.e. should I run the for loop regardless)? yes. you need to call aio_return on cancelled requests. BTW, in your above sample, if you hit the aio_error result == EINPROGRESS case you continue but never recheck again (unless you somehow execute the for loop again). aio_suspend until the IO completes may work for you here. A simple full functioning test application showing you problem will probably result in better answers to your questions. _______________________________________________ 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.

1 0

Re: about update
by Justin Walker 21 Apr '04

21 Apr '04

On Apr 20, 2004, at 20:37, yetty wrote: Dir sir, My system is Mac OS X 10.2.8. And I want to update to 10.3.3. I have download Mac OS X 10.3.3 from www.apple.com/support/downloads/index1.html But When I tried to update, a message showed that I need to update to 10.3 before I can update to 10.3.3. The problem is that although I have found 10.3.2 and 10.3.1 from www.apple.com/support/downloads/index1.html I could not find Mac OS X 10.3 there. How can I get Mac OS X 10.3? The rule is: major releases (10.x -> 10.x+1) are not free for download; you have to purchase it. The only version updates that are downloadable for free (i.e., via Software Update) are the minor releases (10.x.y -> 10.x.y+1). Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | "Weaseling out of things is what | separates us from the animals. | Well, except the weasel." | - Homer J Simpson *--------------------------------------*-------------------------------* _______________________________________________ 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.

1 0

about update
by yetty 21 Apr '04

21 Apr '04

Dir sir, My system is Mac OS X 10.2.8. And I want to update to 10.3.3. I have download Mac OS X 10.3.3 from www.apple.com/support/downloads/index1.html But When I tried to update, a message showed that I need to update to 10.3 before I can update to 10.3.3. The problem is that although I have found 10.3.2 and 10.3.1 from www.apple.com/support/downloads/index1.html I could not find Mac OS X 10.3 there. How can I get Mac OS X 10.3? Thank you and best wishes! Ye Wenxi in Tokyo _______________________________________________ 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.

1 0

sysctlfn
by Matt Jaffa 21 Apr '04

21 Apr '04

Hi, Is there a way to use sysctl in my KEXT to allow a userland daemon call some function in my KEXT , I was reading the sys/sysctl.h file and it appears that there might be some capability of this, but can't tell from just that file alone 1. Is this feasible 2. If so can someone send me an example or write a quick one down of how this works, Thanks, Matt _______________________________________________ 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.

1 0

SYSCTL_STRUCT
by Matt Jaffa 20 Apr '04

20 Apr '04

Hi, I am declaring this in my KEXT extension: SYSCTL_STRUCT(_kern, OID_AUTO, aaaaaaa, CTLFLAG_RW|CTLFLAG_ANYBODY, &somo2, EtherNode, "EtherNode"); I was just wondering if I use sysctlbyname in my userland daemon and I grab that structure from my KEXT, is it also going to grab the chain of structures? so if my STRUCT is struct EtherNode { struct testing * next; int value; } struct EtherNode somo2; am I going to get the chain too? Same thing with setting the struct value. Well I have tested it a little bit, in my userland daemon I created a chain of these and passed it in, After I passed it in my KEXT noticed it was changed and the next was now not null, but the values in the next were not the sameones from my daemon, I don't think it is allowing me to pass chains in. Matt _______________________________________________ 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.

1 0

Re: about sys_call and ioctl (Modified by Shawn Erickson)
by Tim Seufert 20 Apr '04

20 Apr '04

On Apr 19, 2004, at 7:30 PM, yetty wrote: -- Redirected on behalf of Ye Wenxi -- Dear sir, Thank you for your advice. What I need is to access device from user space.I think the method of accessing any type of device should be similar. OK. Actually I will write a File Filter Driver. And in user space I want to access the driver and encode files. Actually I want to encrypt files. For example, now there are some files (such as test1.rtf and test2.txt and so on)in Users/Ye/documents/・, and normally everyone can open or read or write or save them. What I want to do is to protect them by command [Macintosh:/]Mary%crypt /Users/Ye/documents/ ・ After I input such command [Macintosh:/]Ye%crypt /Users/Ye/documents/・ the contents of the files (such as test1.rtf and test2.txt and so on) under folder /Users/Ye/documents/ will be encrypted. Therefore anyone else can not read the contents of the files unless I input the decode command. Could you use an encrypted disk image? MacOS X supports AES-128 encrypted disk images. You could mount one when you want its files to be available, and unmount it when you don't. _______________________________________________ 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.

1 0

Cancelling AIO
by Lamont Cranston 20 Apr '04

20 Apr '04

I have the following code in a userland AIO test app to clean up file I/O and close a file: // cancel any pending aio requests. retval = aio_cancel( file, NULL ); if ( retval == AIO_NOTCANCELED ) { // Requests could not be cancelled. Go through the // AIO list and wait for completion. for( i = 0; i < aiocb_list_size; i++ ) { if ( !aiocb_list[i] ) continue; while( aio_error( aiocb_list[i] ) == EINPROGRESS ) continue; aio_return( aiocb_list[i] ); } } close( file ); ---------------------------------------- This code is common to file and raw disk I/O. I am having problems with raw disk I/O. I know that aio_cancel() does not work with raw disks (so the for loop will always execute), but does that mean I can't make the call at all? While running a series of AIO tests in which rdisks are opened and closed, eventually aio_read() and aio_write() begin to fail because aio_max_requests_per_process and aio_max_requests have been exceeded. I make sure that these are set to twice what I need via sysctl() calls. If I take out the aio_cancel() call and just run the for loop, everything works. For file I/O, do I need to call aio_return() even if requests are cancelled via aio_cancel() (i.e. should I run the for loop regardless)? Thanks Yahoo! Photos: High-quality 4x6 digital prints for 25" _______________________________________________ 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.

1 0