From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cagney To: Joshua Lamorie Cc: gdb@sourceware.cygnus.com Subject: Re: Variable locations in a loaded kernel (bsd.gdb) Date: Mon, 27 Aug 2001 10:48:00 -0000 Message-id: <3B8A87FD.6070805@cygnus.com> References: X-SW-Source: 2001-08/msg00214.html > Gidday there, > > I'm trying to find how a specific variable is referenced in an > OpenBSD 2.8 kernel. I build a kernel with symbols, and load it into gdb, > however I can't find a way to see where a specific variable is stored > (stack, memory, register etc...). I can't run the kernel, and when I type > 'p function::variable' it responds with... > > No frame is currently executing in block scpshc_decompress. > > Once I have the offset, or address or whatever about the variable, > then I can examine its value in 'ddb' after the kernel crashes. > > Thanks in advance. I'm running GDB 4.16.1. The 'configure' > script doesn't let me compile version 5 on OBSD2.8. Outch! They are both really old GDBs. Could I sugest downloading someting more recent? The snapshots are tracking the unreleased 5.1 branch: http://sources.redhat.com/gdb/download Hopefully that at least builds (Changes to get GDB working on the various BSD OSs were only committed after GDB 5 was released). Having done this, I would add a note of caution. 4.16.1 as a GDB version number makes me suspicious - afaik it doesn't exist! I suspect it is in fact 4.16ob1 - an OpenBSD specific branch of GDB - and may contain features never contributed to the FSF. Andrew