Messages in this thread Patch in this message | | | From | Xi Wang <> | Subject | [PATCH net-next] test: bpf: extend "load 64-bit immediate" testcase | Date | Sat, 9 May 2015 04:14:30 -0400 |
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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 <ast@plumgrid.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Xi Wang <xi.wang@gmail.com> --- 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
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