linux.git/tools/testing/selftests/nolibc, branch master

tools/nolibc: add support for Alpha

2026-08-02T07:30:55+00:00

A straightforward new architecture.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Tested-by: Michael Cree 
Link: https://patch.msgid.link/20260722-nolibc-alpha-v2-1-4970e48eb7bf@weissschuh.net

selftests/nolibc: add debug information

2026-07-12T09:55:33+00:00

When working on nolibc, debug information is very valuable.
I find myself adding this flag in many patchsets.

Enable debug information unconditionally, as there is no downside to it.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260707-nolibc-debug-v1-1-31619ec94bbd@weissschuh.net

selftests/nolibc: Add test for getcwd() and readlink()

2026-07-03T17:31:04+00:00

Add a test that uses both getcwd() and readlink() so that both
are exercised.

First the happy path is tested by fetching what should be the
same string via getcwd() and readlink() and checking they match.

Then a few different combinations of bad parameters are passed to
getcwd() to make sure it returns NULL and sets errno in those
cases.

Signed-off-by: Daniel Palmer 
Link: https://patch.msgid.link/20260702085101.3304547-4-daniel@thingy.jp
Signed-off-by: Thomas Weißschuh

selftests/nolibc: test against -Wwrite-strings

2026-05-26T19:06:26+00:00

Users may use this warning when building their own applications.
Make sure that nolibc does not trigger any such warnings.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260525-nolibc-write-strings-v2-3-ab5cc16c7b23@weissschuh.net

selftests/nolibc: use mutable buffer for execve() argv string

2026-05-26T19:06:18+00:00

The existing code would trigger a warning under -Wwrite-strings which is
about to be enabled. Use a mutable buffer instead. While in this
specific case, casting away the 'const' would be fine, let's avoid casts
which are not really necessary.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260525-nolibc-write-strings-v2-2-ab5cc16c7b23@weissschuh.net

tools/nolibc: add ftruncate()

2026-05-24T21:58:04+00:00

On architectures with 32-bit longs, call the compat syscall
__NR_ftruncate64. As off_t is 64-bit it must be split into 2 registers.
Unlike llseek() which passes the high and low parts in explicitly named
arguments, the order here is endian independent.

Some architectures (arm, mips, ppc) require this pair of registers to
be aligned to an even register, so add custom _sys_ftruncate64()
wrappers for those.

A test case for ftruncate is added which validates negative length or
invalid fd return the appropriate error, and checks the length is
correct on success.

Co-developed-by: Jordan Richards 
Signed-off-by: Jordan Richards 
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Reviewed-by: Daniel Palmer 
Link: https://patch.msgid.link/20260521-nolibc-ftruncate-v1-3-5384a83b2402@weissschuh.net

selftests/nolibc: enable CONFIG_TMPFS for sparc32

2026-05-24T21:56:45+00:00

An upcoming selftest will use memfd_create() which require tmpfs.

Enable that.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Reviewed-by: Daniel Palmer 
Link: https://patch.msgid.link/20260521-nolibc-ftruncate-v1-1-5384a83b2402@weissschuh.net

selftests/nolibc: test open mode handling

2026-05-14T15:41:22+00:00

Add a selftest for the new O_TMPFILE open mode handling.
While O_CREAT or openat() are not tested, the code is the same,
so assume these also work.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260514-nolibc-open-tmpfile-v2-4-b4c6c5efa266@weissschuh.net

tools/nolibc: add support for 32-bit parisc

2026-05-03T14:39:54+00:00

Extend nolibc to target the 32-bit parisc architecture.
64-bit is not yet supported.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch/msgid.link/20260428-nolibc-hppa-v5-2-d843d573111a@weissschuh.net

selftests/nolibc: avoid function pointer comparisons

2026-05-03T14:37:13+00:00

The upcoming parisc support would require libgcc to implement function
pointer comparisons. As we try to avoid the libgcc dependency rework
the logic to work without such comparisons.

Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260428-nolibc-hppa-v5-1-d843d573111a@weissschuh.net