arm64: uprobe: Return EOPNOTSUPP for AARCH32 instruction probing

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As stated in linux/errno.h, ENOTSUPP should never be seen by user programs.
When we set up uprobe with 32-bit perf and arm64 kernel, we would see the
following vague error without useful hint.

The sys_perf_event_open() syscall returned with 524 (INTERNAL ERROR:
strerror_r(524, [buf], 128)=22)

Use EOPNOTSUPP instead to indicate such cases.

Signed-off-by: He Zhe <zhe.he@windriver.com>
Link: https://lore.kernel.org/r/20210223082535.48730-1-zhe.he@windriver.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

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He Zhe 2021-02-23 16:25:34 +08:00 • committed by Will Deacon

parent 2596b6ae41

commit d47422d953

1 changed files with 1 additions and 1 deletions

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arch/arm64/kernel/probes/uprobes.c

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