Extend the testcase to catch a signedness bug in the arm64 JIT: test_bpf: #58 load 64-bit immediate jited:1 ret -1 != 1 FAIL (1 times)
This is useful to ensure other JITs won't have a similar bug. Link: https://lkml.org/lkml/2015/5/8/458 Cc: Alexei Starovoitov <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Xi Wang <[email protected]> --- lib/test_bpf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/test_bpf.c b/lib/test_bpf.c index f2c23ffaa6d7..3c41049d72d8 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -1755,7 +1755,8 @@ static struct bpf_test tests[] = { BPF_EXIT_INSN(), BPF_JMP_IMM(BPF_JEQ, R3, 0x1234, 1), BPF_EXIT_INSN(), - BPF_ALU64_IMM(BPF_MOV, R0, 1), + BPF_LD_IMM64(R0, 0x1ffffffffLL), + BPF_ALU64_IMM(BPF_RSH, R0, 32), /* R0 = 1 */ BPF_EXIT_INSN(), }, INTERNAL, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
