January 2005 - Darwin-kernel

Re: booting in console mode
by Peter Lovell 25 Jan '05

25 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 25, 2005, at 12:35 AM, Parav Pandit wrote: Hi, I want to boot my MAC O X 10.3.7 on G5 in text mode only, not in GUI mode. I tried following things but it didn't happen. 1. I tried to modify /etc/rc file where I changed SystemStarter-g to SystemStarter -v. 3.boot args is already set to "-v" I think, this is not the right mailing list to ask this, but what i want to do is i want to print the kprintf() messages which are dumped to /var/log/system.log Inputs will help us a lot. Regards, Parav Pandit Regards.....Peter _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… 2. I uncommented the line in /etc/ttys line #console "/usr/libexec/getty std.9600" vt100 on secure and commented the console "/System/Library/CoreServices/loginwindow.app/Contents/MacOS/ loginwindow" Hhmmm. I had thought that your change (2) would have done it. Well, we live and learn. However, if you just want to be logged in on the console, rather than actually having to be text-mode all through startup, then you can log out of Finder and then log in as ">console" (without the quotes, but with the ">") Of course, you can see the startup console messages by booting with command-V or boot into single-user with command-S. This email sent to site_archiver(a)lists.apple.com

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booting in console mode
by Parav Pandit 25 Jan '05

25 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi, I want to boot my MAC O X 10.3.7 on G5 in text mode only, not in GUI mode. I tried following things but it didn't happen. 1. I tried to modify /etc/rc file where I changed SystemStarter-g to SystemStarter -v. 2. I uncommented the line in /etc/ttys line #console "/usr/libexec/getty std.9600" vt100 on secure and commented the console "/System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow" 3.boot args is already set to "-v" I think, this is not the right mailing list to ask this, but what i want to do is i want to print the kprintf() messages which are dumped to /var/log/system.log Inputs will help us a lot. Regards, Parav Pandit ________________________________________________________________________ Yahoo! India Matrimony: Find your life partner online Go to: http://yahoo.shaadi.com/india-matrimony _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by David Gatwood 24 Jan '05

24 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 24, 2005, at 12:38 PM, Justin Walker wrote: Currently I see my IOLog() messages in to the /var/log/system.log file. Can I redirect it to my serial port? My Sytem is MAC OS X 10.3.7 on Power MAC G5. If yes, Do I have to set do nvram boot-args="debug=0x08" ? (DB_KPRT) I learned from Kernel Programming.pdf . I tried it, but I still get IOLog() messages in the same file. About the USB thing that some folks have mentioned, that won't work. The kprintf requires a serial chip that is directly addressable because it uses polled I/O (so that it can work with interrupts disabled). That pretty much means that without a complete rewrite, you're pretty much limited to the serial hardware on the main logic board, unless you find a PCI card with a Zilog 8530 (in which case you'd probably still need to hack the PCI drivers up a bit to guarantee that the device didn't get remapped or anything...). There are stealth cards for the first generation G5s available from GeeThree. If you have a second generation G5 (after the 2.5 GHz speed bump), well... the stealth cards reportedly won't fit. I don't know if they'll be doing a redesign for those or not (or even if it's possible---you'd have to ask someone at GeeThree). David _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… I believe this should work, if you have a serial port. This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Justin Walker 23 Jan '05

23 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 23, 2005, at 11:01, ravi anand wrote: Regards, Justin -- /~\ The ASCII Justin C. Walker, Curmudgeon-at-Large \ / Ribbon Campaign X Help cure HTML Email / \ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… How do you configure or set up the kernel to start dumping the data on this USB port which is sort of acting as serial console port ? I don't think you can. This kind of debugging is intended for use in an environment where the software (kernel, ...) can't be trusted. To use a USB port connected to a serial gizmo, you need a whole lot of stuff working in order to get good results. In linux you can pass the serial console parameter using boot loader config file to kernel and it will start dumping the messages which goes to system log file to serial console port as well. What a clever idea. By the most outrageous of coincidences, his is discussed in documents available on the Apple Developer website (<http://developer.apple.com>). You can (I did) use the Advanced Search scheme to make your search more effective. This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by ravi anand 23 Jan '05

23 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=GPpfmt/8g9o7sHtbWb/iJWgXFqoxEjuhcW5Akrg49S6Xn+EVPcjKSM+RwY1EtgjJMKdeNtd08wtu5j6D92ixzCUtgDU721M1U4k0pE70wnN7jKFXsYf2Nn1rSsi4GvfBzHvKjWOXeWuKuuR/Tk89hCKY17P5CvNpF5/og89HU6Q= ; _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Felix Kronlage 23 Jan '05

23 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jan 22, 2005, at 21:22 Uhr, Justin Walker wrote: thanks for the info, Justin! iD8DBQFB87kaDTGb09msdNARAnGZAJ46XQT9a26Pqd5sECfUQH7d18USNgCdFaBG E5M+xYM4cpwZANUcC+2gjsg= =/t/c -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… FYI, if you do succeed in getting kprintf output directed to a serial port (cf. mail from Markus and Felix in this thread), be aware that using it will noticeably degrade the performance of your system (the last I looked, kprintf() uses polling to output to its device, and for serial, that means "forever" with interrupts disabled). The last time I used kprintf to serial posts (when I was young, and there was Rhapsody in the air), it degraded the performance of the ethernet driver/network stack by about 90% (I was debugging the stack). felix - -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 http://fkr.hazardous.org | http://opendarwin.org/~fkr/ | FKR-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Justin Walker 22 Jan '05

22 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Following up on my own post: On Jan 21, 2005, at 18:03, Justin Walker wrote: On Jan 21, 2005, at 16:00, Parav Pandit wrote: Hi, Currently I see my IOLog() messages in to the /var/log/system.log file. [snip] Regards, Justin _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… FYI, if you do succeed in getting kprintf output directed to a serial port (cf. mail from Markus and Felix in this thread), be aware that using it will noticeably degrade the performance of your system (the last I looked, kprintf() uses polling to output to its device, and for serial, that means "forever" with interrupts disabled). The last time I used kprintf to serial posts (when I was young, and there was Rhapsody in the air), it degraded the performance of the ethernet driver/network stack by about 90% (I was debugging the stack). -- 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. *--------------------------------------*-------------------------------* This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Felix Kronlage 22 Jan '05

22 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jan 22, 2005, at 17:12, Markus Hitter wrote: I can recommend these: <url: http://www.keyspan.com/products/usb/USA19W/> - -fkr - -- 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 http://fkr.hazardous.org/ | http://opendarwin.org/~fkr/ | FKR-RIPE -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) iD8DBQFB8rHuDTGb09msdNARAkDfAJ90Gg3dcQE5aWc5/hQ8VomfRDf7QACePe/F XVPpsjF14EzvD60rXQp0ZeA= =Yzuj -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… G5 has that modem kind of RJ11 conector, not the serial port that we see on PC, Because it _is_ the outlet of a modem. For several years now, Macs don't have serial ports. Some models allowed to replace the internal modem with a "stealth" card to get one but I can't tell exactly which models this are. This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Markus Hitter 22 Jan '05

22 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Am 22.01.2005 um 01:00 schrieb Parav Pandit: <http://developer.apple.com/sdk/#Kernel> <http://developer.apple.com/technotes/tn/tn2023.html> HTH, Markus - - - - - - - - - - - - - - - - - - - Dipl. Ing. Markus Hitter http://www.jump-ing.de/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… G5 has that modem kind of RJ11 conector, not the serial port that we see on PC, Because it _is_ the outlet of a modem. For several years now, Macs don't have serial ports. Some models allowed to replace the internal modem with a "stealth" card to get one but I can't tell exactly which models this are. If I have to use kprintf() in my driver code, You have a Wintel background? Apple's Kernel Debug Kit and Technical Note 2023 come with a nice description how to set up two machine debugging Mac-like (via ethernet): This email sent to site_archiver(a)lists.apple.com

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Re: IOLog on serial port? Or to use kprintf?
by Justin Walker 22 Jan '05

22 Jan '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Jan 21, 2005, at 16:00, Parav Pandit wrote: Hi, Currently I see my IOLog() messages in to the /var/log/system.log file. Can I redirect it to my serial port? My Sytem is MAC OS X 10.3.7 on Power MAC G5. If yes, Do I have to set do nvram boot-args="debug=0x08" ? (DB_KPRT) I learned from Kernel Programming.pdf . I tried it, but I still get IOLog() messages in the same file. I believe this should work, if you have a serial port. Only kprintf()s go to the serial port. what should be serial port setting for MAC OS X G5? is it 57600 8N1 or 38400 8N1 ? Don't know; it may be 38.4. G5 has that modem kind of RJ11 conector, not the serial port that we see on PC, so do I need to connect it via RJ11 connector to other host ? If all you have is RJ11.... If I have to use kprintf() in my driver code, do I need to recompile the kernel, to see the messages on the console / serial port? I think need to recompile in DEBUG mode, right? I searched the xnu code, but I don't find any code of the kprintf in any of the c files. Where is the kprintf() definition??? You can't have searched very thoroughly. I found it right away. Try "find /path/to/xno -type f | xargs grep kprintf" Regards, Justin -- /~\ The ASCII Justin C. Walker, Curmudgeon-at-Large \ / Ribbon Campaign X Help cure HTML Email / \ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Or U can direct only kprintf() to serial port??? Note that just having an RJ11 jack is not sufficient to guarantee you have a working serial device that can be used by the low-level code in the kernel. I don't think recompiling is necessary. Having a serial device that is supported is (and, unfortunately, I can't help you there). This email sent to site_archiver(a)lists.apple.com

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