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

Re: STL in Kexts
by Krishna Monian 30 Jun '04

30 Jun '04

Templates (my own templated classes) seem to work fine with kexts. However when I try to use the STL I get the following errors in XCode. /usr/lib/gcc/darwin/3.3/libstdc++.a(new_opv.o) incompatible, file contains unsupported type of section (__TEXT,__picsymbolstub1) in load command 0(must specify "-dy /usr/lib/gcc/darwin/3.3/libstdc++.a(del_op.o) incompatible, file contains unsupported type of section (__TEXT,__picsymbolstub1) in load command 0(must specify "-dy And I can't view the remaining part of the error. I am guessing it is saying I need to add the -dynamic flag. However, that doesn't seem to help. Is there any equivalent of the STL "list" or "slist" in libkern? Thanks Krishna --- Dean Reece <dean.reece(a)apple.com> wrote: > Krisna, > > Sorry, but templates and STL are not supported in > the kernel. > You may use the containers in libkern instead > (OSString, OSArray, > OSDictionary, ...). > > - Dean > > > On Jun 29, 2004, at 5:14 PM, Krishna Monian wrote: > > I was just wondering whether it is possible to use > > containers from the STL in a kernel extension. > > > > If so then are there any special settings that > have to > > be made under XCode? > > > > Thanks > > Krishna Monian > > __________________________________ 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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Re: boundary crossing latencies
by Andrew Gallatin 30 Jun '04

30 Jun '04

Jim Magee writes: > > On Jun 29, 2004, at 4:22 PM, Andrew Gallatin wrote: > > > Philippe Jandot writes: > >> With the 64bit kernel of Tiger I guess that those latencies are going > >> to disapear ? > >> Will the kernel be mapped in each app address space ? > > > > I've heard that the kernel won't be 64-bit due to fears about > > breaking ABI compat with IOKit. > > > > Can somebody who's at WWDC and has a Tiger Preview DVD confirm the 64- > > or 32-bitness of the kernel on G5's? Or would that violate NDA? > > The kernel remains 32-bit [for now] while supporting both 32-bit and > 64-bit applications. FWIW, I did some shark traces and found that copyin/copyout account for ~16% of the time in my ioctl path. Removing the copyin/copyout from the benchmark ioctl confirms this. As Jim Magee explained, MacOSX uses a separated 4GB + 4GB address space, so this high copyin/copyout cost for temporary mappings makes perfect sense. Copyin/copyout is no longer just a bcopy with a fault handler setup, its an on-demand remapping of memory. So I think for performance critical ioctls, I'm going to try to map out 1 page of kernel memory into each process when my device is opened. The process copies his ioctl data into that scratch buffer, calls ioctl, and copies the results out. The idea is to avoid the cost of mapping / unmapping the process VM a zillion times in the critical path. When I get a chance to implement this, I'll let you know what, if any, improvement it makes. Thanks again for your help, Drew _______________________________________________ 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: STL in Kexts
by Dean Reece 30 Jun '04

30 Jun '04

Krisna, Sorry, but templates and STL are not supported in the kernel. You may use the containers in libkern instead (OSString, OSArray, OSDictionary, ...). - Dean On Jun 29, 2004, at 5:14 PM, Krishna Monian wrote: I was just wondering whether it is possible to use containers from the STL in a kernel extension. If so then are there any special settings that have to be made under XCode? Thanks Krishna Monian _______________________________________________ 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: STL in Kexts
by Peter Lovell 30 Jun '04

30 Jun '04

On Jun 29, 2004, at 8:14 PM, Krishna Monian wrote: Hi All, I was just wondering whether it is possible to use containers from the STL in a kernel extension. If so then are there any special settings that have to be made under XCode? Thanks Krishna Monian IIRC templates aren't part of the C++ support in kernel-land. If that's true then I'd be surprised if there was any STL support. Regards.....Peter _______________________________________________ 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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STL in Kexts
by Krishna Monian 30 Jun '04

30 Jun '04

Hi All, I was just wondering whether it is possible to use containers from the STL in a kernel extension. If so then are there any special settings that have to be made under XCode? Thanks Krishna Monian __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! 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: boundary crossing latencies
by Jim Magee 29 Jun '04

29 Jun '04

On Jun 29, 2004, at 4:22 PM, Andrew Gallatin wrote: > Philippe Jandot writes: >> With the 64bit kernel of Tiger I guess that those latencies are going >> to disapear ? >> Will the kernel be mapped in each app address space ? > > I've heard that the kernel won't be 64-bit due to fears about > breaking ABI compat with IOKit. > > Can somebody who's at WWDC and has a Tiger Preview DVD confirm the 64- > or 32-bitness of the kernel on G5's? Or would that violate NDA? The kernel remains 32-bit [for now] while supporting both 32-bit and 64-bit applications. --Jim [demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s] _______________________________________________ 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: boundary crossing latencies
by Andrew Gallatin 29 Jun '04

29 Jun '04

Philippe Jandot writes: > With the 64bit kernel of Tiger I guess that those latencies are going > to disapear ? > Will the kernel be mapped in each app address space ? I've heard that the kernel won't be 64-bit due to fears about breaking ABI compat with IOKit. Can somebody who's at WWDC and has a Tiger Preview DVD confirm the 64- or 32-bitness of the kernel on G5's? Or would that violate NDA? Drew _______________________________________________ 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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boundary crossing latencies
by Philippe Jandot 29 Jun '04

29 Jun '04

With the 64bit kernel of Tiger I guess that those latencies are going to disapear ? Will the kernel be mapped in each app address space ? Philippe @FiL +33 671114938 _______________________________________________ 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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Communication with NKE
by Markus Hanauska 29 Jun '04

29 Jun '04

Hello everyone! I'm writing a network kernel extension right now and I have to configure it through a user space program. I'm trying to use the PF_NKE Domain (SYSPROTO_CONTROL protocol) for that, but calling ctl_deregister causes very strange effects. I have attached some sample code further below. I can register using ctl_register, but whenever I unregister using ctl_deregister, a message box pop ups on my desk saying: Server Connection Time Out Attempting to connect to the file Server "" And it will stay there forever, unless I click Disconnect twice and then I get an new message box Server Disconnect In Progress Please wait as this ... And this one really stays infinite. This behavior is 100% reproducible and caused by the code below and I have no idea why. Only loggin out and loggin in again fixes the problem. I tried two different machines, both with the latest Panther version installed, it's the same. The box just doesn't appear if you enable root account and log in as root. Have ever heard about it? Do you thing it is a bug? Is there anything wrong with my short piece of code? Can you maybe help me to somehow get around this problem? Thank you in advance. Here's code from the file dummy_kernelext.c: #include <sys/param.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/mbuf.h> #include <sys/queue.h> #include <sys/socket.h> #include <sys/sockio.h> #include <sys/sysctl.h> #include <sys/systm.h> #include <sys/kern_event.h> #include <net/bpf.h> #include <net/ethernet.h> #include <net/if.h> #include <net/if_arp.h> #include <net/if_dl.h> #include <net/if_types.h> #include <net/dlil.h> #include <net/if_var.h> #include <mach/mach_types.h> #include <sys/types.h> #include <sys/malloc.h> #include <sys/kern_control.h> #define OUR_ID 0x56706E54 /* Four byte ID */ /* I know that it is no valid ID and yes, I did try different ones */ static kern_ctl_ref ctlRef; int dummy_kernelext_ctlSet( kern_ctl_ref ctlref, void *userdata, int opt, void *data, size_t len); int dummy_kernelext_ctlGet( kern_ctl_ref ctlref, void *userdata, int opt, void *data, size_t *len); int dummy_kernelext_ctlConnect( kern_ctl_ref ctlref, void *userdata); void dummy_kernelext_ctlDisconnect( kern_ctl_ref ctlref, void *userdata); int dummy_kernelext_ctlWrite(kern_ctl_ref ctlref, void *userdata, struct mbuf *m); kern_return_t dummy_kernelext_start(kmod_info_t * ki, void * d) { struct kern_ctl_reg myCTL; /* Create my CTL structure */ ctlRef = NULL; bzero(&myCTL, sizeof(myCTL)); myCTL.ctl_id = OUR_ID; myCTL.ctl_unit = 0; myCTL.ctl_flags = CTL_FLAG_PRIVILEGED; myCTL.ctl_write = &dummy_kernelext_ctlWrite; myCTL.ctl_get = &dummy_kernelext_ctlGet; myCTL.ctl_set = &dummy_kernelext_ctlSet; myCTL.ctl_connect = &dummy_kernelext_ctlConnect; myCTL.ctl_disconnect = &dummy_kernelext_ctlDisconnect; /* Register kernel extension to retrieve user space config data */ if (ctl_register(&myCTL, NULL, &ctlRef)) { printf("Could not register CTL!\n"); goto error; } printf("Succesfully registered CTL\n"); /* Return success */ return KERN_SUCCESS; error: printf("We ran into an error ...\n"); /* Return error */ return KERN_FAILURE; } kern_return_t dummy_kernelext_stop(kmod_info_t * ki, void * d) { if (ctlRef) { /* Remove CTL connection */ if (ctl_deregister(ctlRef)) { printf("Could not deregister CTL!\n"); } else { printf("CTL succesfully deregistered\n"); } } return KERN_SUCCESS; } int dummy_kernelext_ctlSet( kern_ctl_ref ctlref, void *userdata, int opt, void *data, size_t len) { printf("CTL SET\n"); return ctl_enqueuedata(ctlref, data, len, 0); // return KERN_SUCCESS; } int dummy_kernelext_ctlGet( kern_ctl_ref ctlref, void *userdata, int opt, void *data, size_t *len) { printf("CTL GET\n"); return KERN_SUCCESS; } int dummy_kernelext_ctlConnect( kern_ctl_ref ctlref, void *userdata) { printf("CTL CONNECT\n"); return KERN_SUCCESS; } void dummy_kernelext_ctlDisconnect( kern_ctl_ref ctlref, void *userdata) { printf("CTL DISCONNECT\n"); } int dummy_kernelext_ctlWrite(kern_ctl_ref ctlref, void *userdata, struct mbuf *m) { printf("CTL WRITE\n"); return KERN_SUCCESS; } #undef OUR_ID -- Best Regards, Markus Hanauska _______________________________________________ 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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IOConnect Functions
by Krishna Monian 28 Jun '04

28 Jun '04

Hi, When I define a function that is going to be called as a result of an IOConnectMethodScalarIStructureO are there any restrictions on the parameters the function has to take? I want to pass in a char** from user-space(memory already allocated) to kernel space, and copy some data into it. Thanks __________________________________ 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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