Maciej W. Rozycki wrote: [snip] > > I discussed this with Richard Sandiford a while ago, and the conclusion > > was to implement an explicit --msym32 option for both gcc and gas to > > improve register scheduling and get rid of the gas hack. So far, nobody > > came around to actually do the work for it. > > ... like this, for example. But if nobody has implemented it yet, then > perhaps nobody is really interested in it? ;-) The old solution works, and kernel developers tend to use old toolchains. > > seen additional load/store insn creeping in ll/sc loops. I believe > > there's a large amount of inline assembly code (not necessarily in the > > kernel) which relies on similiar assumptions. > > With explicit relocs you have no problem with any instructions appearing > inside inline asms unexpectedly. That is if you use the "R" constraint -- > the "m" one never guaranteed that. But it happened to work, and is in widespread use. Thiemo
