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| author | Johan Almbladh <johan.almbladh@anyfinetworks.com> | 2026-09-23 12:51:57 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-24 01:57:48 +0000 |
| commit | db762fd96be225bd06161c9631160c755d891693 (patch) | |
| tree | 9f987a92587cc2804b3ed7ac209dba235cfcb0ae /tools/perf/python/stackcollapse.py | |
| parent | 6db1ce73e9853f533eb7f413f14ba00f8ec6f80d (diff) | |
| download | linux-next-db762fd96be225bd06161c9631160c755d891693.tar.gz linux-next-db762fd96be225bd06161c9631160c755d891693.zip | |
bpf: Fix immediate JMP JEQ/JNE on MIPS32
An addu instruction was emitted instead of addiu, causing the immediate
value 1 to be interpreted as register $at. This made the comparison
result invalid when the immediate operand was negative. Note that $at
is mapped to BPF_REG_AX, which is used for constant blinding.
Fix the instruction to use the immediate form.
Found with test_bpf on MIPS32r1 emulated by QEMU.
Fixes: eb63cfcd2ee8 ("mips, bpf: Add eBPF JIT for 32-bit MIPS")
Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260923105158.3514342-1-johan.almbladh@anyfinetworks.com
Diffstat (limited to 'tools/perf/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions