Re: how to tell which symbols are exported?
Re: how to tell which symbols are exported?
- Subject: Re: how to tell which symbols are exported?
- From: Sam Vaughan <email@hidden>
- Date: Sun, 10 Apr 2005 18:19:40 +1000
When you build an xnu kernel, the .exports files in xnu/config/ are
used to create the fake symbols in System.kext. If you add symbols to
a debug kernel that you want to access from within your kext, you need
to add them to the appropriate .exports file(s), otherwise kextload
will fail.
You also can't assume that just because a symbol is in /mach_kernel,
it'll be listed in System.kext and available to you. I usually run the
following grep over the binaries in System.kext to determine if I'll be
able to use a particular kernel symbol from inside a kext. In this
example, the function physio():
% find /System/Library/Extensions/System.kext/PlugIns \
-type f -a ! -name "*.plist" | xargs nm | grep physio
Sam
On Fri, 8 Apr 2005, Andrew Gallatin <email@hidden> wrote:
I there a tool to get a list of all the symbols that each of the
loaded kernel extensions are exporting on a given system?
Background: I'm sitting at a shell prompt, trying to kextload an older
kext on a newer system. A symbol required for the kext, call it
"foo", which used to be resolved by the dependancies listed in the
kext's Info.plist in an older version of MacOSX no longer seems to be
found by kextload. I know the symbols is still there, as nm
/mach_kernel
shows it. Ideally, I'll be able to update Info.plist with vi and
go on my merry way..
Thanks,
Drew
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