Date: Mon, 08 Nov 2010 18:08:43 -0800 From: Julian Elischer <julian@freebsd.org> To: FreeBSD Current <current@freebsd.org> Subject: Re: kgdb and .ko files Message-ID: <4CD8AD2B.5000505@freebsd.org> In-Reply-To: <4CD8970D.6030003@freebsd.org> References: <4CD8970D.6030003@freebsd.org>
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relying to self with more info.. On 11/8/10 4:34 PM, Julian Elischer wrote: > my usual command set for doing .ko debugging issomething like: > %kgdb /sys/amd64/compile/DEBUG/kernel.symbols > (kgdb) target remote pu_serial2:7005 > (kgdb) sharedlibrary driver.ko > (kgdb) directory /home/me/branches/blah/obj/ > > (kgdb) info sharedlibrary >> From To Syms Read Shared Object >> Library > 0xffffffff81222000 0xffffffff8129dac0 Yes > home/me/branches/blah/freebsd8-amd64/output/driver.ko > > but recently the last line has started returning: > >> From To Syms Read Shared Object >> Library > Yes > home/me/branches/blah/freebsd8-amd64/output/driver.ko > > Now I can guess that the problem might be something to do with > readinf symbols as our > method of generating the .ko changed a while back but when I look at > it I do see: > > awk -f /sys/conf/kmod_syms.awk driver.ko.debug export_syms | xargs > -J% objcopy %driver.ko.debug > objcopy --only-keep-debug driver.ko.debug driver.ko.symbols > objcopy --strip-debug --add-gnu-debuglink=driver.ko.symbols > driver.ko.debug driver.ko > > so theoretically the plain driver.ko should result in (k)gdb looking > up the symbol file driver.ko.symbols > which should have all the symbol information needed for debugging.. > or am I misreading this? > > doesn't seem to work but it does seem to improve if I link the .ko > file to the symbols file.. it seems changing the first objcopy line to give the full path name of the symbol file seems to help > > this is in 8.1 rather than -current but I can't test -current. > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to > "freebsd-current-unsubscribe@freebsd.org" >
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