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authorDavid Daney <david.daney@cavium.com>2017-05-24 16:35:49 -0700
committerDavid S. Miller <davem@davemloft.net>2017-05-25 14:37:56 -0400
commit791caeb084c57e3a4d648cf1ee799d1f70c0ef4e (patch)
tree571c695467478a648c37e10291fc47fb8609a964 /lib
parentae08ea976862dcd058af89fcddc2ef4790b4a2bd (diff)
test_bpf: Add a couple of tests for BPF_JSGE.
Some JITs can optimize comparisons with zero. Add a couple of BPF_JSGE tests against immediate zero. Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_bpf.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 889bc31785be..be88cbaadde3 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -4504,6 +4504,44 @@ static struct bpf_test tests[] = {
{ },
{ { 0, 1 } },
},
+ {
+ "JMP_JSGE_K: Signed jump: value walk 1",
+ .u.insns_int = {
+ BPF_ALU32_IMM(BPF_MOV, R0, 0),
+ BPF_LD_IMM64(R1, -3),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 6),
+ BPF_ALU64_IMM(BPF_ADD, R1, 1),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 4),
+ BPF_ALU64_IMM(BPF_ADD, R1, 1),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 2),
+ BPF_ALU64_IMM(BPF_ADD, R1, 1),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 1),
+ BPF_EXIT_INSN(), /* bad exit */
+ BPF_ALU32_IMM(BPF_MOV, R0, 1), /* good exit */
+ BPF_EXIT_INSN(),
+ },
+ INTERNAL,
+ { },
+ { { 0, 1 } },
+ },
+ {
+ "JMP_JSGE_K: Signed jump: value walk 2",
+ .u.insns_int = {
+ BPF_ALU32_IMM(BPF_MOV, R0, 0),
+ BPF_LD_IMM64(R1, -3),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 4),
+ BPF_ALU64_IMM(BPF_ADD, R1, 2),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 2),
+ BPF_ALU64_IMM(BPF_ADD, R1, 2),
+ BPF_JMP_IMM(BPF_JSGE, R1, 0, 1),
+ BPF_EXIT_INSN(), /* bad exit */
+ BPF_ALU32_IMM(BPF_MOV, R0, 1), /* good exit */
+ BPF_EXIT_INSN(),
+ },
+ INTERNAL,
+ { },
+ { { 0, 1 } },
+ },
/* BPF_JMP | BPF_JGT | BPF_K */
{
"JMP_JGT_K: if (3 > 2) return 1",

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