Pete Wright
2018-Nov-07 00:40 UTC
How do you boot the debug kernel installed from kernel-dbg.txz?
On 11/6/18 4:22 PM, Rainer Duffner wrote:> Hi, > > I need to install a debug-kernel. > > I didn?t install the debug-kernel when I installed the system (11.2), but I downloaded the archive. > > I can unpack it - but how do I then select the kernel at boot?I may be mistaken, but I don't think you actually need to boot the debug-kernel and modules (in fact I don't think you can), rather those files are intended for being read by kgdb while debugging a core that is generated by savecore(8) so that you have access to full symbol table etc.? this page section in the dev handbook debugging kernel core dumps: https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html hope this helps, -pete -- Pete Wright pete at nomadlogic.org @nomadlogicLA
Rainer Duffner
2018-Nov-07 00:47 UTC
How do you boot the debug kernel installed from kernel-dbg.txz?
> Am 07.11.2018 um 01:40 schrieb Pete Wright <pete at nomadlogic.org>: > > I may be mistaken, but I don't think you actually need to boot the debug-kernel and modules (in fact I don't think you can), rather those files are intended for being read by kgdb while debugging a core that is generated by savecore(8) so that you have access to full symbol table etc. this page section in the dev handbook debugging kernel core dumps: > > https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html <https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html> > > hope this helps, > > -peteYes, you are right. However obvious it may seem, it isn?t for somebody who?s never really done that? I asked the same question in my PR and got an answer immediately - didn?t expect that to go that fast?