Messages in this thread | | | Date | Wed, 11 Nov 2020 21:39:41 +0100 | From | Peter Zijlstra <> | Subject | Re: WARNING: can't access registers at asm_common_interrupt |
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On Wed, Nov 11, 2020 at 08:25:36PM +0000, Andrew Cooper wrote:
> > Right, it makes objtool's job a _little_ easier, since it already knows > > how to read alternatives. But it still has to learn to deal with the > > conflicting stack layouts. > > I suppose the needed abstraction is "these blocks will start and end > with the same stack layout", while allowing the internals to diverge.
It's a little more complicated than that due to the fact that there is only a single ORC table.
So something like:
alt0 alt1 0x00 push 0x00 nop 0x01 nop 0x01 push
is impossible to correctly unwind.
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