[CC += Mike, original author of the text] On 12/3/18 4:07 AM, snyh wrote: > alpha use v0 e.g. $0 as the return value register both in > syscall abi and C abi. > > see also > https://github.com/torvalds/linux/blob/master/arch/alpha/kernel/entry.S#L479 I need a little help here, probably in the form of a more detailed commit message. Can you explain how one can verify the point made in the patch? (I'm not wiser after following the above link.) Thanks, Michael > diff --git a/man2/syscall.2 b/man2/syscall.2 > index 3f4d64c..11e1416 100644 > --- a/man2/syscall.2 > +++ b/man2/syscall.2 > @@ -181,7 +181,7 @@ and the register used to signal an error. > l2 l2 l2 l2 l2 l. > arch/ABI instruction syscall # retval error Notes > _ > -alpha callsys v0 a0 a3 [1] > +alpha callsys v0 v0 a3 [1] > arc trap0 r8 r0 - > arm/OABI swi NR - a1 - [2] > arm/EABI swi 0x0 r7 r0 - -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
