On Sat, 14 Aug 2010 17:32:25 +0300 Kostik Belousov <kostik...@gmail.com> wrote:
> On Sat, Aug 07, 2010 at 09:37:22PM +0200, Marius Strobl wrote: > > On Sat, Aug 07, 2010 at 09:09:04PM +0300, Kostik Belousov wrote: > > > On Sat, Aug 07, 2010 at 03:59:39PM +0200, Marius Strobl wrote: > > > > On Fri, Aug 06, 2010 at 02:11:31PM +0300, Kostik Belousov wrote: > > > > > On Fri, Aug 06, 2010 at 01:08:08PM +0200, Marius Strobl wrote: > > > > > > On Fri, Aug 06, 2010 at 12:04:04PM +0300, Kostik Belousov > > > > > > wrote: > > > > > > > On Fri, Aug 06, 2010 at 07:06:33AM +0200, Jeremie Le Hen > > > > > > > wrote: > > > > > > > > Hi Kib, > > > > > > > > > > > > > > > > In-Reply-To: > > > > > > > > <20100629083901.gg13...@deviant.kiev.zoral.com.ua> On > > > > > > > > Tue, Jun 29, 2010 at 11:39:01AM +0300, Kostik Belousov > > > > > > > > wrote: > > > > > > > > > On Tue, Jun 29, 2010 at 10:26:39AM +0200, Marius > > > > > > > > > Strobl wrote: > > > > > > > > > > On Mon, Jun 28, 2010 at 05:48:59PM +0300, Kostik > > > > > > > > > > Belousov wrote: > > > > > > > > > > > On Wed, Jun 23, 2010 at 11:09:59PM +0200, Jeremie > > > > > > > > > > > Le Hen wrote: > > > > > > > > > > > > Hi Kostik, > > > > > > > > > > > > > > > > > > > > > > > > This patch seems to have faded out from > > > > > > > > > > > > memory. Is it possible to go forward and > > > > > > > > > > > > commit it? > > > > > > > > > > > I refreshed the patch. Hopefully, nobody will > > > > > > > > > > > object, and I commit it shortly. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Thanks, > > > > > > > > > > > > Regards. > > > > > > > > > > > > > > > > > > > > > > > > On Sat, Jul 25, 2009 at 12:29:16AM +0300, > > > > > > > > > > > > Kostik Belousov wrote: > > > > > > > > > > > > > Below is the prototype that seems to work for > > > > > > > > > > > > > me both with patched and old rtld on i386. > > > > > > > > > > > > > Patch also contains bits for amd64 that I did > > > > > > > > > > > > > not tested yet. All other arches are not > > > > > > > > > > > > > buildable for now. > > > > > > > > > > > > > > > > > > > > > > > > > > Patch completely eliminates sysctl syscalls > > > > > > > > > > > > > from the rtld and libc startup. Without the > > > > > > > > > > > > > patch, a single run of /bin/ls did 6 sysctls, > > > > > > > > > > > > > with the patch, no sysctls is queried at all. > > > > > > > > > > > > > > > > > > > > > > > > Comparing with the originally posted patch, I > > > > > > > > > > > added support for all architectures, tested amd64 > > > > > > > > > > > and ia32 on amd64, and converted getpagesizes(3) > > > > > > > > > > > that added two more startup sysctls. > > > > > > > > > > > > > > > > > > > > > > Would be nice to get a testing for at least > > > > > > > > > > > some !x86 architectures before the commit, I > > > > > > > > > > > added some people who helped me in past, to the > > > > > > > > > > > Cc:. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Doesn't look good on sparc64: > > > > > > > > > > <...> > > > > > > > > > > NFS ROOT: 192.168.1.40:/usr/data/nfsroot/sparc64 > > > > > > > > > > dc1: link state changed to UP > > > > > > > > > > pid 24 (ifconfig), uid 0: exited on signal 11 > > > > > > > > > > Segmentation fault > > > > > > > > > > Interface IP-Address Broadcast > > > > > > > > > > pid 29 (rcorder), uid 0: exited on signal 11 > > > > > > > > > > Segmentation fault > > > > > > > > > > pid 30 (grep), uid 0: exited on signal 11 > > > > > > > > > > Segmentation fault > > > > > > > > > > pid 31 (rcorder), uid 0: exited on signal 11 > > > > > > > > > > Segmentation fault > > > > > > > > > > > > > > > > > > > > pid 32 (date), uid 0: exited on signal 11 > > > > > > > > > > Segmentation fault > > > > > > > > > > Jun 29 12:20:50 getty[36]: open /dev/ttyv3: No such > > > > > > > > > > file or directory <...> > > > > > > > > > > > > > > > > > > > > Unfortunately, I currently lack the time to debug > > > > > > > > > > this. > > > > > > > > > > > > > > > > > > Thank you. > > > > > > > > > > > > > > > > Did yu have time to look at this problem? It would be > > > > > > > > nice to have this in the tree. > > > > > > > > > > > > > > I cannot move forward without the help from somebody > > > > > > > having access to sparc64 system where the problem is > > > > > > > reproducable. > > > > > > > > > > > > Do you have a debug version of the patch which outputs the > > > > > > necessary information? > > > > > > > > > > I would suggest to build rtld and libc with debugging symbols > > > > > and get full backtrace from the faults. > > > > > > > > v100# gdb /sbin/ifconfig ifconfig.core > > > > GNU gdb 6.1.1 [FreeBSD] > > > > Copyright 2004 Free Software Foundation, Inc. > > > > GDB is free software, covered by the GNU General Public > > > > License, and you are welcome to change it and/or distribute > > > > copies of it under certain conditions. Type "show copying" to > > > > see the conditions. There is absolutely no warranty for GDB. > > > > Type "show warranty" for details. This GDB was configured as > > > > "sparc64-marcel-freebsd"... Core was generated by `ifconfig'. > > > > Program terminated with signal 11, Segmentation fault. > > > > Reading symbols from /lib/libbsdxml.so.4...done. > > > > Loaded symbols for /lib/libbsdxml.so.4 > > > > Reading symbols from /lib/libjail.so.1...done. > > > > Loaded symbols for /lib/libjail.so.1 > > > > Reading symbols from /lib/libsbuf.so.5...done. > > > > Loaded symbols for /lib/libsbuf.so.5 > > > > Reading symbols from /lib/libipx.so.5...done. > > > > Loaded symbols for /lib/libipx.so.5 > > > > Reading symbols from /lib/libc.so.7...done. > > > > Loaded symbols for /lib/libc.so.7 > > > > Reading symbols from /libexec/ld-elf.so.1...done. > > > > Loaded symbols for /libexec/ld-elf.so.1 > > > > #0 0x000000004089ebdc in getpagesizes (pagesize=0x7fdffffe2f8, > > > > nelem=1) > > > > at /usr/home/marius/co/head/src/lib/libc/gen/getpagesizes.c:75 > > > > 75 while (nops > 0 && ps[nops - 1] == 0) > > > > (gdb) bt #0 0x000000004089ebdc in getpagesizes > > > > (pagesize=0x7fdffffe2f8, nelem=1) > > > > at /usr/home/marius/co/head/src/lib/libc/gen/getpagesizes.c:75 > > > > #1 0x00000000407f4314 in malloc_init () > > > > at /usr/home/marius/co/head/src/lib/libc/stdlib/malloc.c:5418 > > > > #2 0x00000000407f67d8 in malloc (size=32) > > > > at /usr/home/marius/co/head/src/lib/libc/stdlib/malloc.c:5932 > > > > #3 0x00000000001069ac in clone_setdefcallback > > > > (ifprefix=0x11b8a8 "wlan", p=0x10a1a0 <wlan_create>) > > > > at /usr/home/marius/co/head/src/sbin/ifconfig/ifclone.c:106 #4 > > > > 0x0000000000119864 in __do_global_ctors_aux () #5 > > > > 0x000000000010243c in _init () #6 0x0000000000102508 in _start > > > > () #7 0x000000004022719c in .rtld_start () > > > > at > > > > /usr/home/marius/co/head/src/libexec/rtld-elf/sparc64/rtld_start.S:59 > > > > #8 0x000000004022719c in .rtld_start () > > > > at > > > > /usr/home/marius/co/head/src/libexec/rtld-elf/sparc64/rtld_start.S:59 > > > > Previous frame identical to this frame (corrupt stack?) > > > > > > > > All faults I've looked at died the same why. > > > Thank you. I think I found the reason, which was an unitialized > > > variable. I also fixed a sillyness with osrelver. > > > > > > In the patched tree, there is tools/test/auxinfo that could be > > > used to quick-check the system. > > > > > > Updated patch is available at > > > http://people.freebsd.org/~kib/misc/rtld_auxinfo.1.patch > > > > I can confirm that this versions works on sparc64. > After the discussion with Alexander, I made the change to allow libc > to access aux vectors, instead of providing rtld interface to fetch > values. > > I decided to keep the single function that fetch the values, because > it is convenient place to do digesting of the vector. > > http://people.freebsd.org/~kib/misc/rtld_auxinfo.2.patch No objections here. -- Alexander Kabaev
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