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| author | Tiezhu Yang <[email protected]> | 2025-05-14 14:18:10 +0000 |
|---|---|---|
| committer | Huacai Chen <[email protected]> | 2025-05-14 14:18:10 +0000 |
| commit | 0b326b2371f94e798137cc1a3c5c2eef2bc69061 (patch) | |
| tree | ddd5c5cae7fef993df8e7b0456629f97531cd800 /scripts/gcc-plugins/sancov_plugin.c | |
| parent | LoongArch: Save and restore CSR.CNTC for hibernation (diff) | |
| download | kernel-0b326b2371f94e798137cc1a3c5c2eef2bc69061.tar.gz kernel-0b326b2371f94e798137cc1a3c5c2eef2bc69061.zip | |
LoongArch: uprobes: Remove user_{en,dis}able_single_step()
When executing the "perf probe" and "perf stat" test cases about some
cryptographic algorithm, the output shows that "Trace/breakpoint trap".
This is because it uses the software singlestep breakpoint for uprobes
on LoongArch, and no need to use the hardware singlestep. So just remove
the related function call to user_{en,dis}able_single_step() for uprobes
on LoongArch.
How to reproduce:
Please make sure CONFIG_UPROBE_EVENTS is set and openssl supports sm2
algorithm, then execute the following command.
cd tools/perf && make
./perf probe -x /usr/lib64/libcrypto.so BN_mod_mul_montgomery
./perf stat -e probe_libcrypto:BN_mod_mul_montgomery openssl speed sm2
Cc: [email protected]
Fixes: 19bc6cb64092 ("LoongArch: Add uprobes support")
Signed-off-by: Tiezhu Yang <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/sancov_plugin.c')
0 files changed, 0 insertions, 0 deletions