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authorXi Wang <xi.wang@gmail.com>2015-05-09 08:14:30 (GMT)
committerDavid S. Miller <davem@davemloft.net>2015-05-11 15:02:27 (GMT)
commit986ccfdbd90a292e8242c5d2647d8bb8565c38c3 (patch)
treedf0a49c8d5b06eb7c56781228d22599b88a08c6b /lib/test_bpf.c
parent32f89e5c1af2f00159f11707101b8e867d7b6211 (diff)
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 <ast@plumgrid.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Xi Wang <xi.wang@gmail.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/test_bpf.c')
-rw-r--r--lib/test_bpf.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index f2c23ff..3c41049 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,

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