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The CIL Reference Guide specifies how name resolution is suppose
to work within an expanded macro.
1. Items defined inside the macro
2. Items passed into the macro as arguments
3. Items defined in the same namespace of the macro
4. Items defined in the caller's namespace
5. Items defined in the global namespace
But Lorenzo Ceragioli <lorenzo.ceragioli@phd.unipi.it> found
that the first step is not done.
So the following policy:
(block A
(type a)
(macro m ()
(type a)
(allow a self (CLASS (PERM)))
)
)
(block B
(call A.m)
)
will result in:
(allow A.a self (CLASS (PERM)))
instead of the expected:
(allow B.a self (CLASS (PERM)))
Now when an expanded call is found, the macro's namespace is
checked first. If the name is found, then the name was declared
in the macro and it is declared in the expanded call, so only the
namespace of the call up to and including the global namespace
will be searched. If the name is not found in the macro's namespace
then name resolution continues with steps 2-5 above.
Signed-off-by: James Carter <jwcart2@gmail.com>
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