From 986ccfdbd90a292e8242c5d2647d8bb8565c38c3 Mon Sep 17 00:00:00 2001 From: Xi Wang Date: Sat, 9 May 2015 04:14:30 -0400 Subject: [PATCH] test: bpf: extend "load 64-bit immediate" testcase 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 Cc: Will Deacon Signed-off-by: Xi Wang Acked-by: Alexei Starovoitov Acked-by: Daniel Borkmann Signed-off-by: David S. Miller --- 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, -- 2.20.1