Date: Sun, 28 Sep 2014 18:35:51 -0700 From: Garrett Cooper <yaneurabeya@gmail.com> To: =?utf-8?Q?Jos=C3=A9_P=C3=A9rez_Arauzo?= <fbl@aoek.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, Benjamin Kaduk <kaduk@MIT.EDU> Subject: Re: What do you use for kernel debugging? Message-ID: <B3589A0F-AF06-4F7D-80C9-F614CFA21370@gmail.com> In-Reply-To: <20140929003358.M78145@aoek.com> References: <20140928071641.M7664@beckpeccoz.com> <alpine.GSO.1.10.1409281553060.21571@multics.mit.edu> <20140929003358.M78145@aoek.com>
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> On Sep 28, 2014, at 17:51, "José Pérez Arauzo" <fbl@aoek.com> wrote: > > Hi Benjamin, > > On Sun, 28 Sep 2014 15:54:36 -0400 (EDT), Benjamin Kaduk wrote >> On Sun, 28 Sep 2014, José Pérez Arauzo wrote: >> >>> Hello, >>> I am trying to track down a (deadlock?) issue in CURRENT via DDB. The > kernel does >>> not complete hw probes on my Acer V5. >>> >>> I get stuck on apic_isr looping which leads nowhere. >>> >>> So I thought maybe things improve if I debug from another machine. >>> >>> >>> What do you use for kernel debugging? According to the handbook kgdb over > serial >>> is a good option, do you agree? I'm on a netbook with no ethernet and no > option >>> for firewire: can I have a USB / nullmodem setup to work? >> >> You cannot. > > Oh, what a shame. Why not? Is it because you need hardware probe to > be over to use it? > > Today I bought a shining USB to USB thingy made by Hama, and guess what? > It's not supported on FBDS, altought uplcom(4) reports support for > Hama USB to RS232 brother. The bootloader doesn't support USB debugging and I'm pretty sure the devices don't support local/remote debugging :(.. I'll do some poking around. I'll talk to some SMEs and see if I can write up a TODO list for a wiki page. Cheers!
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