On Wed, 2021-05-19 at 17:55 +1000, Nicholas Piggin wrote: > Excerpts from Joakim Tjernlund's message of May 19, 2021 5:33 pm: > > On Wed, 2021-05-19 at 02:13 +0300, Dmitry V. Levin wrote: > > > Hi, > > > > > > On Thu, Jun 11, 2020 at 06:12:01PM +1000, Nicholas Piggin wrote: > > > [...] > > > > - Error handling: The consensus among kernel, glibc, and musl is to > > > > move to > > > > using negative return values in r3 rather than CR0[SO]=1 to indicate > > > > error, > > > > which matches most other architectures, and is closer to a function > > > > call. > > > > What about syscalls like times(2) which can return -1 without it being an > > error? > > They do become errors / indistinguishable and have to be dealt with by > libc or userspace. Which does follow what most architectures do (all > except ia64, mips, sparc, and powerpc actually). > > Interesting question though, it should have been noted. > > Thanks, > Nick
I always figured the ppc way was superior. It begs the question if not the other archs should change instead? Jocke
