April 2010 - Darwin-dev - lists.apple.com

Re: Shutdown from a KEXT
by Eric Gouriou 30 Apr '10

30 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=content-type :mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; s=sasl; bh= aGVF0FLoicx35PAP2xQSlFy+Af8=; b=c9Y7pVAarzsavnEgYuspG1g6km3nWsSF g2eG+AFeog0a/pcJw78vDfMcM1yE2PsnilOk1MlNFmPxNxPsiuvWe+sij/8v0pLE HK1J7JHdmEFpXAnJxBl5ytjtEYAc/U54Iu5LDqtwMT4dVlg8NdZ22xsfw+YLtWIm AJX6DjlgknM= Domainkey-signature: a=rsa-sha1; c=nofws; d=pobox.com; h=content-type :mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; q=dns; s= sasl; b=bMRP68s8di91Zq74GKBXQAI44QCEoDxI90Np8f+J1iylEcea+pSZlUZ7 jOCTP/gCN3JrNZXYZkwq38zIA+/5OYFBVhBGAzmtG1ZWqm2YKvhlhdAkna/iCWqt ao3pcbTBuO11VWw8AeCKGkB+HI0vHEsMyXGlXTkwjshnhqnATSA= On Apr 29, 2010, at 9:05 PM, Terry Lambert wrote: > On Apr 29, 2010, at 7:51 PM, Andrew James wrote: >> Hi Guys, >> >> I'm trying to initiate a forced shutdown from inside a KEXT, this is >> to meet certain requirements of a piece of hardware. >> >> The only solutions I've found was to pass a signal to a application >> which then uses APIs not available to KEXTs. >> >> Does anyone have a better solutions? I would prefer it to be >> integrated into a single KEXT > > You can not do this. launchd is responsible for the orderly shutdown of they system. It's even worse than that. launchd is only capable of performing orderly shutdown of the "Unix-y side" of the world. Cocoa/Carbon/Java/... Applications are not expected to or typically coded to handle a SIGTERM. loginwindow takes care of performing application terminations, then tells launchd to proceed. Hence while invoking shutdown / reboot might work, there is a good chance that data loss will occur at the upper levels. Eric > > For a disorderly shutdown, there's always: > > panic("I can't shut down the system from a KEXT, so I am calling panic instead"); > > 8-) > > -- Terry > _______________________________________________ > 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/eric.gouriou%40pobox.com > > This email sent to eric.gouriou(a)pobox.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: Shutdown from a KEXT
by Terry Lambert 30 Apr '10

30 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi Guys, I'm trying to initiate a forced shutdown from inside a KEXT, this is to meet certain requirements of a piece of hardware. The only solutions I've found was to pass a signal to a application which then uses APIs not available to KEXTs. Does anyone have a better solutions? I would prefer it to be integrated into a single KEXT For a disorderly shutdown, there's always: 8-) -- Terry _______________________________________________ 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 Apr 29, 2010, at 7:51 PM, Andrew James wrote: You can not do this. launchd is responsible for the orderly shutdown of they system. panic("I can't shut down the system from a KEXT, so I am calling panic instead"); This email sent to site_archiver(a)lists.apple.com

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Shutdown from a KEXT
by Andrew James 30 Apr '10

30 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=FVKghZSk3GD816BfVWW4I0B5cNuC9gAzDC0ABVV2ztE=; b=PBivUsZoHOYb8jevJ49bKneZDrwNGeqn68D5yhsLhfb/UGqPnMyC2ENWHOuv8lmcJl Rs27HEWNnqIPritpFnYM2zyf84IB5tK1WHzvJaCHkxkD5+09kyCvq7Izdj6GVL64pXo0 0QCdL38k+Mxk+k++v1/P6QCuIASQE/jqFlU4c= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=tB5zCpDEjbMKpXjAsLZaQPNHQflYPXMDxj5H30DuC2w+c6411UbLTxJ0bAwg81TIpt uKnNC041iaRSG/JGD9jzAMm7p9BJiuDPtVlJWeOK0EBF0YbSU1n5guVfD7Sj8snuvzaK FjiL8dfI1Ud77wbN2Ih0mYxehlKmGM5IuVGBw= Hi Guys, I'm trying to initiate a forced shutdown from inside a KEXT, this is to meet certain requirements of a piece of hardware. The only solutions I've found was to pass a signal to a application which then uses APIs not available to KEXTs. Does anyone have a better solutions? I would prefer it to be integrated into a single KEXT Kind Regards, Andrew James _______________________________________________ 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: Interpreting sample(1) output on bundle
by Terry Lambert 29 Apr '10

29 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Use the command: vmmap System\ Preferences -- Terry Hey list, I'm debugging a hang reported by several users of a preference pane bundle. I asked one user to sample(1) System Preferences to get a stack trace: ... snip ... 4415 -[NSApplication sendAction:to:from:] 4415 0x1000132ae 4415 0x100012ba8 4415 0x100012e25 4415 _CF_forwarding_prep_0 ... snip ... Full output: http://pastebin.org/192055. The hang occurs after clicking a button, so this stack trace makes sense. I disassembled the bundle using otool -tv, but have been unable to correlate the first address (0x1000132ae) with an address in the disassembled code. My tactic to locate the correct address was to take the low 12 bits of the address [1], in this case 0x2ae, and search the bundle's disassembled code for this address suffix, where the immediately preceding instruction must be a call instruction: 0xxxx2a9 call 0xfeedface 0xxxx2ae ... But yet this pattern did not occur in the otool output. Could someone suggest what I might be doing wrong? Thanks! David [1] I used this tactic based on empirical evidence that dynamic libraries/bundles are always loaded at a page offset, so that the low 12 bits of the address of an instruction in the sample(1) output should be equal to low 12 bits of the same instruction in the otool output. Is this correct? _______________________________________________ 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… to get the information about file mappings vs. addresses. From there, you will have to identify the plgin at the sample address (sample doesn't do this for you), and from there, identify where in the plugin its happening (assuming you own it) or bug report it with the necessary load address information to the vendor, whoever it is. On Apr 29, 2010, at 6:15 AM, Dave Keck wrote: This email sent to site_archiver(a)lists.apple.com

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Interpreting sample(1) output on bundle
by Dave Keck 29 Apr '10

29 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:from:date :message-id:subject:to:content-type; bh=jDiLFs/qPWlSnX/CW/+zS6/d8clX2sS3r71LU0V+snU=; b=BRUHHi7Y2JQczOEJV2wM5thufa5r6w8rITNp4/jY8VSDHinraUjcxMT1N51XKWc8Lb KKcVM+iOhyy6/gnbIu6RcLt1jt6G+JpgYHdRR2qxOhe2NMZ5rwamcWwTyJIEmwBwy7WG lr2MbyrDWQiimO8dXUFywPX9z/u0Vyt7/m67M= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:from:date:message-id:subject:to:content-type; b=T4dupP8nkf4YZfJkgwmDN5qNpHkzLA2F3zLaMAD2fUhTMG0uemNcTxTs9ALZ00vcL5 qnnCZkvt7u4shazzUTqDfo+UiQECCyJjbHABi3RRw5MqlJnZVFKHapGPVClUrOAsRSQG NLnv7Ojj8keOvnCuBgMD3tPBYl5c4HNR+3kdY= Hey list, I'm debugging a hang reported by several users of a preference pane bundle. I asked one user to sample(1) System Preferences to get a stack trace: ... snip ... 4415 -[NSApplication sendAction:to:from:] 4415 0x1000132ae 4415 0x100012ba8 4415 0x100012e25 4415 _CF_forwarding_prep_0 ... snip ... Full output: http://pastebin.org/192055. The hang occurs after clicking a button, so this stack trace makes sense. I disassembled the bundle using otool -tv, but have been unable to correlate the first address (0x1000132ae) with an address in the disassembled code. My tactic to locate the correct address was to take the low 12 bits of the address [1], in this case 0x2ae, and search the bundle's disassembled code for this address suffix, where the immediately preceding instruction must be a call instruction: 0xxxx2a9 call 0xfeedface 0xxxx2ae ... But yet this pattern did not occur in the otool output. Could someone suggest what I might be doing wrong? Thanks! David [1] I used this tactic based on empirical evidence that dynamic libraries/bundles are always loaded at a page offset, so that the low 12 bits of the address of an instruction in the sample(1) output should be equal to low 12 bits of the same instruction in the otool output. Is this correct? _______________________________________________ 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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inject raw IP packet using NDRV socket
by Andy Huang 27 Apr '10

27 Apr '10

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Re: pcap_inject
by Aaron Turner 26 Apr '10

26 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:cc:content-type :content-transfer-encoding; bh=AJfJD6NpG83WqeDlCdijqGTkbJKHmUZmm1xZAz/aSno=; b=vnHKf1o/T/icg4Kn4zXBGf79HKLeZy+QYoglpTfgvxp9E62FHzjbAMfVQDXRiGKYJY F7Oc0PPT3s8pzhVV/f3x7f00QWvs1CANL2DwGSi2tVJxdZnqOMA/5X61F/6np1xWLkNQ mOYP1aDONh6+rWnKXj5qLkHa/DFjUEC/ZPnRc= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=CVg39aB3ubiH9vgm5CEbKXU9mpAQZSNbLNTrdiAaPhi9YwaP33J9legUh/WlboJ6pO Hl6baBhEvHa5POtozOHRnnOiEEm6AfSPOKdxpgLnQw34YBbD9ePzq4lwznjCmDbe6Vta x1EjbtVjzqIXFWtiFSebTIP5Nzr9xT80UnlyA= On Mon, Apr 26, 2010 at 1:09 PM, Andy Huang <andy.y.huang(a)gmail.com> wrote: > Hi, > > > > I am trying to write a daemon program that sets up the tunnel, with root > privilege. After I received the packet from the tunnel, then I need to > inject the packet to the stack, So I I used the pcap_inject, and it works > w/o error, I can verify that by looking at the wireshark and the packet is > correct, but the the client application tha tries to receive the packet just > won't be able to receive that packet. the following is the packet from > wireshark. Notice it is a multicast packet. > > 0000 01 00 5e 1b 6a 01 00 21 91 7e fd d5 08 00 45 00 ..^.j..! .~....E. > 0010 00 4a 5e 2d 00 00 1e 11 57 83 20 61 74 75 e8 1b .J^-.... W. atu.. > 0020 6a 01 04 24 30 39 00 36 ec 6d 41 54 26 54 20 4d j..$09.6 .mAT&T M > 0030 75 6c 74 69 63 61 73 74 0d 0a 4d 6f 6e 20 41 70 ulticast ..Mon Ap > 0040 72 20 32 36 20 31 34 3a 31 37 3a 30 39 20 43 44 r 26 14: 17:09 CD > 0050 54 20 32 30 31 30 0d 0a T > 2010.. > > > > But the multicast receiver just can't receive the packet. If I run the > multicast sender and receiver on the same PC, the multicast receiver program > is able to receive the packet, I compare the packet, the only difference is > the src address. pcap_inject sends packets *out* the interface, bypassing the routing table & IP stack of the host sending the packet. Wireshark sees the packets on the way out, but your client application will never see them. You'll need to parse out the payload of the packet and use the standard socket calls to send packets to the host. -- Aaron Turner http://synfin.net/ Twitter: @synfinatic http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. -- Benjamin Franklin "carpe diem quam minimum credula postero" _______________________________________________ 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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pcap_inject
by Andy Huang 26 Apr '10

26 Apr '10

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Re: How to use cpuid?
by Duane Murphy 23 Apr '10

23 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Thank you Shantonu. That helps. I'm trying to test for support of a specific CPU instruction feature. In this case instructions that is only available in the latest CPUs. I've noticed that Gestalt(gestaltX86Features) and Gestalt(gestaltX86AdditionalFeatures) are the userland equivalent of cpuid(). I'm hoping they are transparent and just return the raw results. Ah, machdeps.cpu.feature_bits and extfeature_bits might be even easier. Thanks! On Apr 23, 2010, at 10:46 AM, Shantonu Sen wrote: > No, they really aren't. For one thing, the inline assembly assumes > you have access to %ebx as a free register, which isn't the case for > userspace code. > > What are you really trying to do? I'd recommend "sysctl > machdep.cpu" (or the equivalent sysctlbyname(3)) to get most feature > information. > > Shantonu Sen > ssen(a)apple.com > > Sent from my Mac Pro > > On Apr 23, 2010, at 10:14 AM, Duane Murphy wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> While I usually agree with that, the do_cpuid and cpuid functions are >> in-line and don't require linking. That's why I asked. >> >> These functions should be legit from either userland or from the >> kernel. >> >> On Apr 23, 2010, at 9:45 AM, Brian Bergstrand wrote: >> >>> You don't. The symbols in the Kernel framework are only exported by >>> the Kernel. They are not exported by any userland libraries. There >>> are of course symbol names shared by kernel and userland, but that >>> is by name only. >>> >>> On Apr 23, 2010, at 7:36 PM, Duane Murphy wrote: >>> >>>> -----BEGIN PGP SIGNED MESSAGE----- >>>> Hash: SHA256 >>>> >>>> I'd like to use the do_cpuid() function in i386/cpuid.h of the >>>> Kernel >>>> framework in a user land application as well as in a kext. >>>> >>>> The kext I can get compiling, but getting the userland include file >>>> working isn't playing nice. I added the Kernel framework to the >>>> Xcode >>>> project, but that doesn't really help because the internal header >>>> files don't use the Kernel prefix. >>>> >>>> How do I go about using do_cpuid() from a user land application? >>>> >>>> Thanks, >>>> >>>> ...Duane >>>> >>> >>> >>> >> >> ...Duane >> >> >> >> >> -----BEGIN PGP SIGNATURE----- >> Version: PGP Desktop 9.10.0 (Build 500) >> Charset: US-ASCII >> >> wsBVAwUBS9HVaUrg9acQ4r2CAQiHLAgAvh4lk0iraccHUmhIzeVfn1tCZoNPu4t8 >> OHNzNK6qWZHqkFA/i4QVhRZVA3vAke3A9VtI1E6CamwLobp+B3KDmcACGQGI8rZf >> ehoSpg81NkPRbRT5WsVcGR1HVOiHFctaTKCphXPqObfPD1Y09Jbyqvowv+0WBxkN >> zvchIUxFjoQPTUBl4/ZUOkv46Byys8J/Aea9x0Z/R/iJL0kvQ507HO2HkuJRd9nw >> rv16FpgrxZ6mcROses/fiYH0QGa/c8rTYBQQvia5DfmfQq/zwcMdvPv9yUfZRVky >> PT0Qol+wgdoFcVbXvBvwwWrqqTQj5IBWPqw2ed57QshAz2ZKDxTwSg== >> =C5TJ >> -----END PGP SIGNATURE----- >> _______________________________________________ >> 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/ssen%40apple.com >> >> This email sent to ssen(a)apple.com > ...Duane -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.10.0 (Build 500) Charset: US-ASCII wsBVAwUBS9HfI0rg9acQ4r2CAQgvMQgAuYDXbZwOBf0y3RGYmOJLkvlzfNQvS4Ig 7dscTaC53T07FO4sOyk0GdFu+SBk1ZViA97cg0eyyvGWOtj2oSkNqmv+ibEsR2xf 2floytRZrizUXMW7/rxX/6felSSXl7PJN/SYrTfP4VYw38aIlv1qTuOSKyghgOic YBWLFmhf98IVYRsKmJd9GmQmO95uplM47npxYLq+kp8JrY9L8q1gpgT73eC6IrUk W0l8oXRr+xpbN2Q97uOFgOOOrl41jKH/C8wxDIvGZmRVXM6ldMn2WSXmmZKSZt+7 TINukZHHCAWdIdr8OK9Xd/CpFfYgDRwwPdFg+FltX1WFiamxPq9E3g== =yQeZ -----END PGP SIGNATURE----- _______________________________________________ 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: How to use cpuid?
by Shantonu Sen 23 Apr '10

23 Apr '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com No, they really aren't. For one thing, the inline assembly assumes you have access to %ebx as a free register, which isn't the case for userspace code. What are you really trying to do? I'd recommend "sysctl machdep.cpu" (or the equivalent sysctlbyname(3)) to get most feature information. Shantonu Sen ssen(a)apple.com Sent from my Mac Pro On Apr 23, 2010, at 10:14 AM, Duane Murphy wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > While I usually agree with that, the do_cpuid and cpuid functions are > in-line and don't require linking. That's why I asked. > > These functions should be legit from either userland or from the kernel. > > On Apr 23, 2010, at 9:45 AM, Brian Bergstrand wrote: > >> You don't. The symbols in the Kernel framework are only exported by >> the Kernel. They are not exported by any userland libraries. There >> are of course symbol names shared by kernel and userland, but that >> is by name only. >> >> On Apr 23, 2010, at 7:36 PM, Duane Murphy wrote: >> >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA256 >>> >>> I'd like to use the do_cpuid() function in i386/cpuid.h of the Kernel >>> framework in a user land application as well as in a kext. >>> >>> The kext I can get compiling, but getting the userland include file >>> working isn't playing nice. I added the Kernel framework to the Xcode >>> project, but that doesn't really help because the internal header >>> files don't use the Kernel prefix. >>> >>> How do I go about using do_cpuid() from a user land application? >>> >>> Thanks, >>> >>> ...Duane >>> >> >> >> > > ...Duane > > > > > -----BEGIN PGP SIGNATURE----- > Version: PGP Desktop 9.10.0 (Build 500) > Charset: US-ASCII > > wsBVAwUBS9HVaUrg9acQ4r2CAQiHLAgAvh4lk0iraccHUmhIzeVfn1tCZoNPu4t8 > OHNzNK6qWZHqkFA/i4QVhRZVA3vAke3A9VtI1E6CamwLobp+B3KDmcACGQGI8rZf > ehoSpg81NkPRbRT5WsVcGR1HVOiHFctaTKCphXPqObfPD1Y09Jbyqvowv+0WBxkN > zvchIUxFjoQPTUBl4/ZUOkv46Byys8J/Aea9x0Z/R/iJL0kvQ507HO2HkuJRd9nw > rv16FpgrxZ6mcROses/fiYH0QGa/c8rTYBQQvia5DfmfQq/zwcMdvPv9yUfZRVky > PT0Qol+wgdoFcVbXvBvwwWrqqTQj5IBWPqw2ed57QshAz2ZKDxTwSg== > =C5TJ > -----END PGP SIGNATURE----- > _______________________________________________ > 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/ssen%40apple.com > > This email sent to ssen(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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