Nolibc supports the x32 ABI on x86.
Add a testcase to make sure the support stays functional.
QEMU user does not have support for x32, so skip the test there.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250712-nolibc-x32-v1-2-6d81cb798710@weissschuh.net
The logic would not catch if the test process crashes and would
incorrectly report a "success" state. Fix this by looking for the final
"Total number of errors:" message and printing "failure" if it was not
seen.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://lore.kernel.org/r/20250709155512.971080-2-benjamin@sipsolutions.net
[Thomas: fix patch prefix]
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
tools/scripts/Makefile.include now has the same override,
removing the need for the one in the nolibc Makefile.
Drop the superfluous custom override.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://lore.kernel.org/r/20250620-tools-cross-s390-v2-2-ecda886e00e5@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
When an error is encountered by printf() it needs to be reported.
errno() is already set by the callback.
sprintf() is different, but that keeps working and is already tested.
Also add a new test.
Fixes: 7e4346f4a3 ("tools/nolibc/stdio: add a minimal [vf]printf() implementation")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250704-nolibc-printf-error-v1-2-74b7a092433b@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Add support for SuperH/"sh" to nolibc.
Only sh4 is tested for now.
The startup code is special:
__nolibc_entrypoint_epilogue() calls __builtin_unreachable() which emits
a call to abort(). To make this work a function prologue is generated to
set up a GOT pointer which corrupts "sp".
__builtin_unreachable() is necessary for __attribute__((noreturn)).
Also depending on compiler flags (for example -fPIC) even more prologue
is generated.
Work around this by defining a nested function in asm.
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70216
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Acked-by: Rob Landley <rob@landley.net>
Acked-by: D. Jeff Dionne <jeff@coresemi.io>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20250623-nolibc-sh-v2-3-0f5b4b303025@weissschuh.net
For the test implementation of the SuperH architecture a second serial
serial port needs to be used. Unfortunately the currently used 'stdio'
driver does not support multiple serial ports at the same time.
Switch to the 'file' driver which does support multiple ports and is
sufficient for the nolibc-test usecase.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20250623-nolibc-sh-v2-2-0f5b4b303025@weissschuh.net
The variable block got disordered at some point.
Use the correct ordering.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20250623-nolibc-sh-v2-1-0f5b4b303025@weissschuh.net
Add support for the MIPS 64bit N64 and ILP32 N32 ABIs.
In addition to different byte orders and ABIs there are also different
releases of the MIPS architecture. To avoid blowing up the test matrix,
only add a subset of all possible test combinations.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Tested-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Link: https://lore.kernel.org/r/20250623-nolibc-mips-n32-v3-4-6ae2d89f4259@weissschuh.net
On GCC 15 the following warnings is emitted:
nolibc-test.c: In function ‘run_stdlib’:
nolibc-test.c:1416:32: warning: initializer-string for array of ‘char’ truncates NUL terminator but destination lacks ‘nonstring’ attribute (11 chars into 10 available) [-Wunterminated-string-initialization]
1416 | char buf[10] = "test123456";
| ^~~~~~~~~~~~
Increase the size of buf to avoid the warning.
It would also be possible to use __attribute__((nonstring)) but that
would require some ifdeffery to work with older compilers.
Fixes: 1063649cf5 ("selftests/nolibc: Add tests for strlcat() and strlcpy()")
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250623-nolibc-nonstring-v1-1-11282204766a@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Hook up nolibc-test with the kselftests framework.
This enables CI systems and developers to easily execute the tests.
While nolibc-test does not emit KTAP output itself that is not a problem,
as the kselftest executor will wrap the output in KTAP.
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250620-nolibc-selftests-v1-4-f6b2ce7c5071@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
The nolibc tests are not real kselftests, they work differently and
provide a different interface. Users trying to use them like real
selftests may be confused and the tests are not executed by CI systems.
To make space for an integration with the kselftest framework, move the
custom tests out of the way.
The custom tests are still useful to keep as they provide functionality
not provided by kselftests.
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250620-nolibc-selftests-v1-3-f6b2ce7c5071@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
nolibc only supports symbol-based stackprotectors, based on the global
variable __stack_chk_guard. Support for this differs between
architectures and toolchains. Some use the symbol mode by default, some
require a flag to enable it and some don't support it at all.
Before the nolibc test Makefile required the availability of
"-mstack-protector-guard=global" to enable stackprotectors.
While this flag makes sure that the correct mode is available it doesn't
work where the correct mode is the only supported one and therefore the
flag is not implemented.
Switch to a more dynamic probing mechanism.
This correctly enables stack protectors for mips, loongarch and m68k.
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250609-nolibc-stackprotector-robust-v1-1-a1cfc92a568a@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Only the standard POSIX modes are supported.
No extensions nor the (noop) "b" from ISO C are accepted.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-13-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Not all configurations support namespaces, so skip the tests where
necessary. Also if the tests are running without privileges.
Enable the namespace configuration for those architectures where it is not
enabled by default.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-12-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-11-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-10-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-9-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-8-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-7-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-6-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-5-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-4-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
The %m format can be used to format the current errno.
It is non-standard but supported by other commonly used libcs like glibc and
musl, so applications do rely on them.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-2-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This is used in various selftests and will be handy when integrating
those with nolibc.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-1-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Add nolibc support for m68k. Should be helpful for nommu where
linking libc can bloat even hello world to the point where you get
an OOM just trying to load it.
Signed-off-by: Daniel Palmer <daniel@thingy.jp>
Link: https://lore.kernel.org/r/20250426224738.284874-1-daniel@0x0f.com
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
printf can pad each argument to a certain width.
Implement this for compatibility with the kselftest harness.
Currently only padding with spaces is supported.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Now that we have a proper snprintf() implementation,
make sure truncation is handled properly.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
With the addition of snprintf() and its usage in nolibc-test, the name of
the "vfprintf" test suite is not accurate anymore.
Rename the suite to be more generic.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
With a proper snprintf() implementation in place, the ugly pipe usage is
not necessary anymore.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
nolibc's waitpid() now uses the waitid() syscall internally.
This removes the original reasoning for the reverted commit as
waitpid() is now available on all platforms and has an easier interface.
Switch back to waitpid().
This reverts commit a0bc8947ac.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
In nolibc intmax_t and uintmax_t are always the same as
(unsigned) long long/uint64_t as 128bit numbers are not supported.
Even libcs that do support 128bit numbers often fix intmax_t to 64bit
as it is used in ABIs and any change would break those.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
UBSAN detects undefined behaviour at runtime.
To avoid introduction of new UB, enable UBSAN for nolibc-test.
By signalling detected errors through traps no runtime dependency
is necessary.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250419-nolibc-ubsan-v2-7-060b8a016917@weissschuh.net
The include of sys/io.h is not necessary anymore since
commit 67eb617a8e ("selftests/nolibc: simplify call to ioperm").
It's existence is also problematic as the header does not exist on all
architectures.
Reported-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250324-nolibc-ioperm-v1-1-8a7cfb2876ae@weissschuh.net
openat is useful to avoid needing to construct relative paths, so expose
a wrapper for using it directly.
Signed-off-by: Louis Taylor <louis@kragniz.eu>
Link: https://lore.kernel.org/r/20250306184147.208723-1-louis@kragniz.eu
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
