Re: [PATCH v2 0/2] nolibc: Add fallocate()
From: Thomas Weißschuh
Date: Mon Apr 27 2026 - 16:02:26 EST
Hi Daniel,
On 2026-04-17 20:26:20+0900, Daniel Palmer wrote:
> While poking around with my "static PIE for nommu" series I found
> I needed fallocate(). Implementing it turned out a bit more
> interesting than I thought it would be due to how the offset and
> size need to be passed on 32bit machines.
>
> I have ran the tests on m68k, arm, arm64, riscv[32|64], x86_64,
> i386, x32 (v2: + lots of mips, ppc..) . I probably missed something,
> maybe there is a better way to do this. Maybe it can't actually
> pass an offset or size >4GB on x32? (v2: I think this is good now)
>
> v2:
> - Addressed Thomas' comments
> - Trial and error'd a test for the arguments being passed correctly.
> Hopefully someone smarter than I am can tell if it actually works.
>
> Daniel Palmer (2):
> tools/nolibc: fcntl: Add fallocate()
> selftests/nolibc: Add a very basic test for fallocate()
Could you rebase the series on latest nolibc/for-next?
Now that the large file support has landed this should make more sense.
> tools/include/nolibc/arch-mips.h | 11 ++++
> tools/include/nolibc/fcntl.h | 32 +++++++++++
> tools/include/nolibc/sys.h | 8 +++
> tools/testing/selftests/nolibc/nolibc-test.c | 58 ++++++++++++++++++++
> 4 files changed, 109 insertions(+)
>
> --
> 2.51.0
>