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[114.145.5.195]) by smtp.googlemail.com with ESMTPSA id d9443c01a7336-2b5faa2e5cesm21407035ad.25.2026.04.17.04.26.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Apr 2026 04:26:30 -0700 (PDT) From: Daniel Palmer To: w@1wt.eu, linux@weissschuh.net Cc: linux-kernel@vger.kernel.org, Daniel Palmer Subject: [PATCH v2 0/2] nolibc: Add fallocate() Date: Fri, 17 Apr 2026 20:26:20 +0900 Message-ID: <20260417112622.1182216-1-daniel@thingy.jp> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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() 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