On Wed, 12 Dec 2018, Arnd Bergmann wrote: > > MIPS had o32, n32, n64 since like forever. > > o32 and n32 are practically the same, the only difference on the > syscall ABI that I can see are the actual syscall numbers, and > the 'struct sigcontext' definition. And for syscalls that have 64-bit arguments, n32 generally passes those in a single register (like n64), not pairs of registers (like o32). But, yes, userspace structure layout for n32 is generally much closer to o32 than to n64. -- Joseph S. Myers joseph@xxxxxxxxxxxxxxxx
