Re: [RFC PATCH v2 3/8] tools/nolibc: i386: Implement syscall with 6 arguments

Alviro Iskandar Setiawan
2022-03-22T14:48:12Z

On Tue, Mar 22, 2022 at 8:37 PM David Laight wrote:
> dunno, 'asm' register variables are rather more horrid and
> should probably only be used (for asm statements) when there aren't
> suitable register constraints.
>
> (I'm sure there is a comment about that in the gcc docs.)

I don't find the comment that says so here:
https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html

The current code looks valid to me, but I would still prefer to use
the explicit register constraints instead of always using "r"(var) if
available. No strong reason in denying that, tho. Still looks good.

-- Viro