[Bug default/20514] New: Write a kabidiff utility to compare the ABI of Linux Kernel trees

["dodji at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20514

            Bug ID: 20514
           Summary: Write a kabidiff utility to compare the ABI of Linux
                    Kernel trees
           Product: libabigail
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: default
          Assignee: dodji at redhat dot com
          Reporter: dodji at redhat dot com
                CC: libabigail at sourceware dot org
  Target Milestone: ---

It would be useful to have an ABI comparison tool, just like abidiff, that
would compare the ABI exposed by the Linux kernel to its modules.

As an initial step, I guess we can consider functions (and global variables)
that are considered part of the kernel's internal ABI to be those marked by the
macros EXPORT_SYMBOL and EXPORT_SYMBOL_GPL.

The tool would consider a kernel "tree" to be the union of the kernel binary
and the accompanying modules that are intended to be loaded by it.

As a first step, though, just considering the kernel binary would be a good
proof of concept of what we can come up with.

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