On Fri, Jan 18, 2002 at 10:31:17AM -0800, Ulrich Drepper wrote: > "H . J . Lu" <hjl@lucon.org> writes: > > > I don't see there are any registers we can use without breaking ABI. > > On the other hand, can we change the mips kernel to save k0 or k1 for > > user space? > > Are these registers which are readable by normal users but writable > only in ring 0? If yes, this is definitely worthwhile (similar to how I can write to k0/k1. But the value is not perserved by kernel. > x86 works). The only problem will be the MIPS variants which don't > have this register. I bet there are some. I don't think so. k0/k1 is reserved for OS. I don't know if OS can restore it for use space or not. H.J.
