syscall: update linux/loong64 kernel ABI, emulate fstatat with statx
The linux/loong64 kernel ABI has changed a little since the inception
of the Go port; most notably fstat and fstatat are being removed [1],
leaving only statx as the stat mechanism. Fortunately the structs are
easy enough to translate, and we now exclusively use statx across the
board on loong64 for best compatibility with past and future kernels
(due to the architecture's young age, statx is always available).
In wiring up the statx calls, it turned out the linux/loong64 syscall
definitions were out-of-date, so the generation script received some
tweaking as well.
[1]: https://lore.kernel.org/all/
20220518092619.
1269111-1-chenhuacai@loongson.cn/
Change-Id: Ifebb9ab9fef783683e453fa331d623575e824a48
Reviewed-on: https://go-review.googlesource.com/c/go/+/407694
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Alex Rakoczy <alex@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>