Date: Fri, 28 Aug 2015 16:37:56 -0700 From: John Baldwin <jhb@freebsd.org> To: John-Mark Gurney <jmg@funkthat.com> Cc: 'freebsd-arch' <freebsd-arch@freebsd.org> Subject: Re: Supporting cross-debugging vmcores in libkvm Message-ID: <8789359.0qvzdHHvAS@ralph.baldwin.cx> In-Reply-To: <20150828211952.GG33167@funkthat.com> References: <3121152.ujdxFEovO3@ralph.baldwin.cx> <3887505.r5DL7PVlOf@ralph.baldwin.cx> <20150828211952.GG33167@funkthat.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Friday, August 28, 2015 02:19:52 PM John-Mark Gurney wrote: > John Baldwin wrote this message on Fri, Aug 28, 2015 at 13:39 -0700: > > On Friday, August 28, 2015 11:27:05 AM John-Mark Gurney wrote: > > > John Baldwin wrote this message on Tue, Aug 04, 2015 at 10:56 -0700: > > > How will we prevent native only aware apps from getting confused when > > > accessing non-native cores? Will kvm_openfiles fail for non-native > > > cores? or will kvm_read fail for non-native cores? > > > > kvm_openfiles() will fail. kvm_open2() will fail for a non-native core > > if a symbol resolving routine is not supplied. > > > > One API question I had is if it would be useful to allow a void * cookie > > to be passed to the symbol resolving routine (the same cookie would be > > passed to kvm_open2() and stored internally to be passed on each resolution > > request). I think in practice we don't need that level of complexity > > though (my kgdb changes did not). > > I can't think of a reason it would be required, but that doesn't mean > someone else wouldn't need it... You need to resolve symbols to find the root of the global page table structures that let you do virtual to physical translations. > Though wouldn't the core parser provide the symbol lookup function? > > > I will need to rebase this to port the arm64 minidump support over, but > > I also need people to test this. > > I'll see what I can do to help test it... Mostly it needs testing on non-x86. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?8789359.0qvzdHHvAS>