On Sat, Jan 27, 2001 at 08:28:05AM +0100, Maciej W. Rozycki wrote: > > Afaik the only user of MIPS_ATOMIC_SET ever running on Linux/MIPS is the > > Linuxthreads code you wrote, so no. Aside of that the semantics of this > > syscall were defined by older MIPS operating systems such as Risc/OS and > > I think we should follow their example. > > I still haven't seen a definite spec for the call. Sorry, the specs is code and docs I have access to here inside SGI and which I cannot pass on ... > Since you suggest the Linuxthreads code is the only user of the code > (also remember the _test_and_set library function as specified by the ABI), > we might abandon MIPS_ATOMIC_SET and write a _test_and_set syscall > instead. No compatibility issues would be involved and the definition is > clear in the ABI (the library function would become a simple wrapper). We have an IRIX 5 emulation and if I remember right for IRIX 5 MIPS_ATOMIC_SET is still supported, so we need to also. So I fear we'll have to keep sysmips. Which still doesn't mean we should come up with something better. > I'm still uncertain if wasting a syscall number is that great idea, but > we would be free from any compatibility problems. And yes, I still think > an ll/sc emulation could be done independently anyway. Ralf
