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

Re: i386 and source releases
by Andrew Gallatin 27 Jan '06

27 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Graham J Lee writes: > Hi, > > I asked this sort of thing over on darwin-x86 a couple of days ago, > but it's been rather quiet, so I thought I'd come over here :-) > > I notice that the Darwin 8.4 source corresponds to "Mac OS X 10.4.4 > (for PowerPC)"; what does that actually mean for i386 users? Does it > mean one or more of the following: > > [i] It won't interoperate with Mac OS X on an Intel Mac At least this much is true for IOKit drivers. Apple intentionally broke ABI compatability between Darwin and MacOSX on Intel by removing padding from a few critical IOKit and libkern classes (see the "Universal binary: not compatible with its superclass" thread on darwin-drivers for details). In order to build a an 8.4 source based Darwin which could interoperate with MacOSX on Intel, you would need to walk all the header files shipped with the "Universal" sdk in Xcode and patch Darwin to remove padding the same way that it was removed from the headers (presumably) used to build MacOSX. The stated reason for this ABI breakage was to reduce the wired memory usage of the kernel. It has created a mess for me, because I'd like to ship universal drivers for a PCI-Express NIC, but I cannot test them except on Darwin because no currently shipping Intel Mac has an open PCI-e slot. But Darwin is no longer binary compatible with MacOSX, so I cannot test on Darwin. So this means we'll have to play catch up and release new drivers when Apple releases Intel machines with open PCI-e slots. Sigh. Drew _______________________________________________ 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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i386 and source releases
by Graham J Lee 27 Jan '06

27 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi, Thanks, Graham. _______________________________________________ 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 I asked this sort of thing over on darwin-x86 a couple of days ago, but it's been rather quiet, so I thought I'd come over here :-) I notice that the Darwin 8.4 source corresponds to "Mac OS X 10.4.4 (for PowerPC)"; what does that actually mean for i386 users? Does it mean one or more of the following: [i] It won't interoperate with Mac OS X on an Intel Mac [ii] It won't work on an Intel Mac [iii] It won't build on Intel at all [iv] Apple are simply covering their backs because the source came from the OS X/ppc CVS and legal aren't sure they're fully merged? smime.p7s

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Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
by Chris Sarcone 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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… This email sent to site_archiver(a)lists.apple.com

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Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
by me＠sbooth.org 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Importance: Normal User-agent: SquirrelMail/1.4.5 Hi again Chris, > OS X does not support sending read/write commands except via the BSD > layer (read/write/pread/pwrite/ioctl). Do you suspect that the drive > is not accessing the media during a particular test you are running > and therefore must use FUA? I am in the process of creating an error correcting CD audio extractor for OS X. Part of the error-correcting algorithm is to read the same sector directly from the media several times and then compare the results. If the reads match, it is assumed to be good; if they don't, the drive speed is slowed, the sector is re-read and compared again, etc. Obviously if I read the sector once from disc and then the subsequent reads return identical data because of the drive's cache the scheme will fail. Unfortunately, this is exactly what happens using the DKIOCCDREAD ioctl. Hence the need to use FUA! I am aware of "hackish" ways around this such as reading data blocks larger than the drive's cache, but this is just that- a hack when nothing better is available. Plus, some drives have large caches! Stephen > > -- Chris > > On Jan 24, 2006, at 4:45 PM, me(a)sbooth.org wrote: > >> Chris, >> >> I am familiar with the ioctls in IOCDMediaBSDClient (READ, READ >> TOC, etc). >> >> I would like to use (primarily) the READ (10 or 12) command. I >> need to >> set the FUA bit- I don't believe this is possible with the DKIOCCDREAD >> ioctl. >> >>> Stephen -- >>> >>> What type of raw commands are you trying to send? Have you looked at >>> the list of CD ioctls OS X supports? >>> >>> -- Chris >>> >>> >>> On Jan 24, 2006, at 3:46 PM, me(a)sbooth.org wrote: >>> >>>> Hi Chris, >>>> >>>> Thanks for the response! >>>> >>>>> You might want to start out with what you are trying to achieve. >>>>> Are >>>>> you trying to send commands from kernel-level code or user-level >>>>> code? >>>> >>>> Preferably user-level. >>>> >>>>> If the latter, you might want to check out the sample code found >>>>> in / >>>>> Developer/Examples/IOKit/scsi/SCSITaskLib and consult Accessing >>>>> Hardware From Applications (http://developer.apple.com/ >>>>> documentation/ >>>>> DeviceDrivers/Conceptual/AccessingHardware/AH_Intro/ >>>>> chapter_1_section_1.html). >>>> >>>> I've read these now (thanks for the pointer), and also consulted the >>>> example code, but I'm still confused. The problem for me is that >>>> this all >>>> seems geared towards CD/DVD authoring and authoring-capable >>>> devices. For >>>> my application authoring doesn't matter. All I "need" to do is >>>> send a >>>> small subset of the MMC-2 commands to the drive to access an audio >>>> CD. I >>>> have had some success creating an MMCDeviceInterface, but that >>>> really >>>> doesn't help me because I can't obtain exclusive access from >>>> SCSITaskDeviceInterface. Even if I could, I'm not sure how that >>>> would >>>> help me because I really don't want to send raw SCSI tasks. I >>>> still don't >>>> understand enough about IOServiceGetMatchingServices to know which >>>> key to >>>> pass in to try and get an IOSCSIMultimediaCommandsDevice. >>>> >>>> Stephen >>>> >>>>> >>>>> HTH, >>>>> >>>>> -- Chris >>>>> >>>>> >>>>> On Jan 24, 2006, at 2:30 PM, me(a)sbooth.org wrote: >>>>> >>>>>> I will start by saying the IOKit is pretty much a black box for >>>>>> me. I've >>>>>> done only basic tasks such as creating a dictionary and calling >>>>>> IOServiceGetMatchingServices for it. Unless I've missed >>>>>> something, >>>>>> the >>>>>> IOKit documentation is slightly less than stunning so I'm asking >>>>>> for help >>>>>> here. >>>>>> >>>>>> I want to create an IOSCSIMultimediaCommandsDevice for >>>>>> accessing an >>>>>> audio >>>>>> CD using MMC-2 commands. >>>>>> >>>>>> If I may rant for a moment, the superclass to >>>>>> IOSCSIMultimediaCommandsDevice is IOSCSIPrimaryCommandsDevice >>>>>> defined in >>>>>> "IOSCSIPrimaryCommandsDevice.h". I don't even have that header >>>>>> file in my >>>>>> 10.4u SDK! It's only in the 10.3.9 IOKit. To boot, that class' >>>>>> superclass is IOSCSIProtocolInterface which also appears only to >>>>>> exist in >>>>>> my 10.3.9 SDK. >>>>>> >>>>>> Anyway, IOSCSIMultimediaCommandsDevice is a subclass of IOService. >>>>>> Can >>>>>> anyone step me through how I would go about obtaining an instance >>>>>> of this >>>>>> class? >>>>>> >>>>>> Thanks! >>>>>> _______________________________________________ >>>>>> 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/sarcone% >>>>>> 40apple.com >>>>>> >>>>>> This email sent to sarcone(a)apple.com >>>>> >>>>> >>>> >>> >>> >> > > ------------------ > 6 Infinite Loop > M/S 306-2MS > Cupertino CA 95014 > phone: (408) 974-4033 > fax: (408) 862-7577 > email: sarcone(a)apple.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… This email sent to site_archiver(a)lists.apple.com

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Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
by Chris Sarcone 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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… This email sent to site_archiver(a)lists.apple.com

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Re: Inline assembly code error: expression must be absolute ???
by Steve Checkoway 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com unsigned long x, carry; x = 20; asm ("li %1,%0" : "=r" (carry) : "r" (x) ); //=======> Error /////////////////////////// $ gcc -x c -Wall - <<EOF > #include <stdio.h> > int main() > { > unsigned long x, carry; > x = 20; > asm( "mr %1,%0" : "=r" (carry) : "r" (x) ); > printf( "%lu\n", carry ); > return 0; > } > EOF $ ./a.out 20 - Steve _______________________________________________ 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 On Jan 25, 2006, at 12:33 AM, rohit dhamija wrote: //asm ("li %0,10" : "=r" (carry)); //=====> this works fine I am moving value of "x" to "carry" but the compiler throws following error: "Parameter error: expression must be absolute (parameter 2)". But if i specify some values instead of passing x, the instruction works fine. What can be the issue ? All suggestions/comments are welcome. li is load immediate which means it must be an immediate value. Try mr (move register) instead. smime.p7s

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Inline assembly code error: expression must be absolute ???
by rohit dhamija 25 Jan '06

25 Jan '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:in-reply-to:mime-version:content-type:references; b=hqkX7Qs9BrE4G0vE4b/XQoezNUcLo3c43I5tPWJAcNN5cTxdk5iiuIj4SAyHiV5eWnNFkWzpJG75Xxm2EOyOIFxxwqdT8x3ku2fH2B9NljIuFf/5wef19u/LXTBEJ8O6GbKFLGFvCxZHee1Cmk3er69xtIAK7f6N+4TbrxnXGro= _______________________________________________ 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: Intel mach-o
by Eric Albert 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jan 24, 2006, at 11:02 PM, Jeshua Lacock wrote: Hope this helps, Eric _______________________________________________ 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… I am running into a problem building a mach-o on the new Intel. Currently "mach-o/ppc/reloc.h" is included and I noticed that there is not a "mach-o/386/reloc.h" header and in turn when I comment it out, I am getting the following errors. test.c:90: error: 'PPC_RELOC_PAIR' undeclared (first use in this function) test.c:90: error: (Each undeclared identifier is reported only once test.c:90: error: for each function it appears in.) test.c: In function 'test_name': test.c:103: error: 'PPC_RELOC_BR24' undeclared (first use in this function) test.c: In function 'gen_test': test.c:202: error: 'struct relocation_info' has no member named 'r_offset' test.c:203: error: 'struct relocation_info' has no member named 'r_offset' test.c:215: error: 'struct relocation_info' has no member named 'r_offset' test.c:220: error: 'struct relocation_info' has no member named 'r_offset' Is there an equivalent 'PPC_RELOC_PAIR' and 'PPC_RELOC_BR24' for Intel? Or do you use the ppc header on Intel? Mac OS X's ABI for Intel uses "generic" relocation entry types, which are defined in <mach-o/reloc.h>. You can see this by running 'otool -arch i386 -rv /path/to/binary', where the binary is universal or Intel-only. This email sent to site_archiver(a)lists.apple.com

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Intel mach-o
by Jeshua Lacock 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Greetings all, #include <mach-o/loader.h> #include <mach-o/nlist.h> #include <mach-o/reloc.h> /*#include <mach-o/ppc/reloc.h> */ Any help or advice is greatly appreciated. Thanks, Jeshua Lacock ___________________________ Programmer/Owner Phone: 877.240.1364 http://OpenOSX.com Fax: 415.462.6211 -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ _______________________________________________ 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… I am running into a problem building a mach-o on the new Intel. Currently "mach-o/ppc/reloc.h" is included and I noticed that there is not a "mach-o/386/reloc.h" header and in turn when I comment it out, I am getting the following errors. test.c:90: error: 'PPC_RELOC_PAIR' undeclared (first use in this function) test.c:90: error: (Each undeclared identifier is reported only once test.c:90: error: for each function it appears in.) test.c: In function 'test_name': test.c:103: error: 'PPC_RELOC_BR24' undeclared (first use in this function) test.c: In function 'gen_test': test.c:202: error: 'struct relocation_info' has no member named 'r_offset' test.c:203: error: 'struct relocation_info' has no member named 'r_offset' test.c:215: error: 'struct relocation_info' has no member named 'r_offset' test.c:220: error: 'struct relocation_info' has no member named 'r_offset' Is there an equivalent 'PPC_RELOC_PAIR' and 'PPC_RELOC_BR24' for Intel? Or do you use the ppc header on Intel? This email sent to site_archiver(a)lists.apple.com

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Re: Obtaining an IOSCSIMultimediaCommandsDevice instance
by me＠sbooth.org 25 Jan '06

25 Jan '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Importance: Normal User-agent: SquirrelMail/1.4.5 Chris, I am familiar with the ioctls in IOCDMediaBSDClient (READ, READ TOC, etc). I would like to use (primarily) the READ (10 or 12) command. I need to set the FUA bit- I don't believe this is possible with the DKIOCCDREAD ioctl. > Stephen -- > > What type of raw commands are you trying to send? Have you looked at > the list of CD ioctls OS X supports? > > -- Chris > > > On Jan 24, 2006, at 3:46 PM, me(a)sbooth.org wrote: > >> Hi Chris, >> >> Thanks for the response! >> >>> You might want to start out with what you are trying to achieve. Are >>> you trying to send commands from kernel-level code or user-level >>> code? >> >> Preferably user-level. >> >>> If the latter, you might want to check out the sample code found in / >>> Developer/Examples/IOKit/scsi/SCSITaskLib and consult Accessing >>> Hardware From Applications (http://developer.apple.com/documentation/ >>> DeviceDrivers/Conceptual/AccessingHardware/AH_Intro/ >>> chapter_1_section_1.html). >> >> I've read these now (thanks for the pointer), and also consulted the >> example code, but I'm still confused. The problem for me is that >> this all >> seems geared towards CD/DVD authoring and authoring-capable >> devices. For >> my application authoring doesn't matter. All I "need" to do is send a >> small subset of the MMC-2 commands to the drive to access an audio >> CD. I >> have had some success creating an MMCDeviceInterface, but that really >> doesn't help me because I can't obtain exclusive access from >> SCSITaskDeviceInterface. Even if I could, I'm not sure how that would >> help me because I really don't want to send raw SCSI tasks. I >> still don't >> understand enough about IOServiceGetMatchingServices to know which >> key to >> pass in to try and get an IOSCSIMultimediaCommandsDevice. >> >> Stephen >> >>> >>> HTH, >>> >>> -- Chris >>> >>> >>> On Jan 24, 2006, at 2:30 PM, me(a)sbooth.org wrote: >>> >>>> I will start by saying the IOKit is pretty much a black box for >>>> me. I've >>>> done only basic tasks such as creating a dictionary and calling >>>> IOServiceGetMatchingServices for it. Unless I've missed something, >>>> the >>>> IOKit documentation is slightly less than stunning so I'm asking >>>> for help >>>> here. >>>> >>>> I want to create an IOSCSIMultimediaCommandsDevice for accessing an >>>> audio >>>> CD using MMC-2 commands. >>>> >>>> If I may rant for a moment, the superclass to >>>> IOSCSIMultimediaCommandsDevice is IOSCSIPrimaryCommandsDevice >>>> defined in >>>> "IOSCSIPrimaryCommandsDevice.h". I don't even have that header >>>> file in my >>>> 10.4u SDK! It's only in the 10.3.9 IOKit. To boot, that class' >>>> superclass is IOSCSIProtocolInterface which also appears only to >>>> exist in >>>> my 10.3.9 SDK. >>>> >>>> Anyway, IOSCSIMultimediaCommandsDevice is a subclass of IOService. >>>> Can >>>> anyone step me through how I would go about obtaining an instance >>>> of this >>>> class? >>>> >>>> Thanks! >>>> _______________________________________________ >>>> 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/sarcone% >>>> 40apple.com >>>> >>>> This email sent to sarcone(a)apple.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… This email sent to site_archiver(a)lists.apple.com

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