Messages in this thread | | | Date | Thu, 08 Sep 2005 12:49:17 -0400 | From | Brian Gerst <> | Subject | Re: Problems Building Bluetooth with K6 and CONFIG_REGPARM |
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Horms wrote: > Hi Andy, > > that does indeed seem to be a problem. I have narrowed it down to > a combination of using K6 and CONFIG_REGPARM. Hunting around a bit > I found this http://my.execpc.com/~geezer/osd/gotchas/, which > suggests the problem is that the asm in question tries to add a register > to the clobber list which is not available. This makes sense, > I guess REGPARM is using edx, so inline assembly can't. > > I've CCed the bluetooth maintainers and lkml, hopefully someone there > will have some input on how to resolve this problem, as inline assembly > isn't my strong point and the problem seems to manifest in Linus' current > git tree. > > The relevant code is the following call to BUILDIO(b,b,char) towards the > bottom of include/asm/io.h > > BUILDIO is as follows, and I am guessing it is the "Nd"(port) and > possibley "d"(port) portions that are problematic.
Sounds like a compiler bug, especially since changing the CPU type fixes it. What version of GCC?
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