Hi Brian, Brian Fundakowski Feldman wrote on Tue, Jun 29, 2004 at 01:00:14PM -0400: [..] > You can find it out without using gdb, too. This will work for > only main kernel symbols, but you can do something similar for > KLDs. Say I want to find a symbol that's in the main kernel object: > > $ objdump -t /boot/kernel/kernel | ruby -ne 'fields = $_.split; if fields[3] == ".text" and fields[2] == "F" and 0xc048a800.between?(fields[0].hex, fields[0].hex + fields[4].hex) then puts $_ end' > c048a7ac l F .text 0000006b cbb_removal [..] Thanks for that hint, but Colin suggested to use "addr2line", which produced some result. Maybe addr2line does a similar thing as your objdump/ruby script: So I have a line of code for the failing address: # addr2line -e kernel.debug 0xc053932b /usr/src/sys/kern/subr_witness.c:898 which is (in my kernel): [..] lock1 = &(*lock_list)->ll_children[(*lock_list)->ll_count - 1]; [..] Well, I'm not sure if this is a big help. I doubt there is a bug in witness code. I'll cross-check with gdb to see if there is the same result. Too bad I couldn't get a crashdump. (What hurts most, is, that in one occasion I had a ddb prompt and could call doadump() successfully. But after reboot, damn /var was full, so savecore could not write it to disk, argl!). Best regards, Daniel -- IRCnet: Mr-Spock - Soon I will be free, then hungry. - Daniel Lang * dl_at_leo.org * +49 89 289 18532 * http://www.leo.org/~dl/Received on Tue Jun 29 2004 - 16:35:59 UTC
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