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selftests: vDSO: parse_vdso: Test __SIZEOF_LONG__ instead of ULONG_MAX

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According to limits.h(2) ULONG_MAX is only guaranteed to expand to an
expression, not a symbolic constant which can be evaluated by the
preprocessor.

Specifically the definition of ULONG_MAX from nolibc can not be evaluated
by the preprocessor. To provide compatibility with nolibc, check with
__SIZEOF_LONG__ instead, with is provided directly by the preprocessor
and therefore always a symbolic constant.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-13-28e14e031ed8@linutronix.de
This commit is contained in:
Thomas Weißschuh 2025-02-26 12:44:52 +01:00 committed by Thomas Gleixner
parent c9fbaa8795
commit 032e871686
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/vDSO/parse_vdso.c
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@ -26,7 +26,7 @@
/* And here's the code. */
#ifndef ELF_BITS
# if ULONG_MAX > 0xffffffffUL
# if __SIZEOF_LONG__ >= 8
# define ELF_BITS 64
# else
# define ELF_BITS 32