On Thu, May 24, 2001 at 03:42:56PM +0200, Maciej W. Rozycki wrote: > > The ll/sc constructs in the kernel use ".set noat" to inhibit use of $at, > > and proceed to use it themselves. This is fine, except for one problem: the > > constraints on memory operands are "o" and "=o", which means offsettable > > memory references. If I'm not mistaken, the assembler will (always?) > > turn these into uses of $at if the offset is not 0 - at least, it certainly > > seems to do that here (gcc 2.95.3, binutils 2.10.91.0.2). Just being honest > > with the compiler and asking for a real memory reference does the trick. > > Both "m" and "o" seem to be incorrect here as both are the same for MIPS; > "R" seems to be appropriate, OTOH. Still gcc 2.95.3 doesn't handle "R" > fine for all cases, but it works most of the time and emits a warning > otherwise. I can't comment on 3.0. I admit the construction is somewhat fragile and will take any patches to cleanup this. Ralf
