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Groups > linux.kernel > #1198881
| From | Nicolas Schichan <nschichan@freebox.fr> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 5/6] test_bpf: add more tests for LD_ABS and LD_IND. |
| Date | 2015-08-03 16:10 +0200 |
| Message-ID | <pToBc-5iK-47@gated-at.bofh.it> (permalink) |
| References | <pToBb-5iK-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This exerces the LD_ABS and LD_IND instructions for various sizes and
alignments. This also checks that X when used as an offset to a
BPF_IND instruction first in a filter is correctly set to 0.
Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
---
lib/test_bpf.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 296 insertions(+)
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index abd0507..a84a875 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -4635,6 +4635,302 @@ static struct bpf_test tests[] = {
{ {0x40, 0x25051982} },
.frag_data = { 0x19, 0x82 },
},
+ /*
+ * LD_IND / LD_ABS on non fragmented SKBs
+ */
+ {
+ /*
+ * this tests that the JIT/interpreter correctly resets X
+ * before using it in an LD_IND instruction.
+ */
+ "LD_IND byte default X",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ { [0x1] = 0x42 },
+ { {0x40, 0x42 } },
+ },
+ {
+ "LD_IND byte positive offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_B, 0x1),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ { [0x3c] = 0x25, [0x3d] = 0x05, [0x3e] = 0x19, [0x3f] = 0x82 },
+ { {0x40, 0x82 } },
+ },
+ {
+ "LD_IND byte negative offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x3e),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_B, -0x1),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ { [0x3c] = 0x25, [0x3d] = 0x05, [0x3e] = 0x19, [0x3f] = 0x82 },
+ { {0x40, 0x05 } },
+ },
+ {
+ "LD_IND halfword positive offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_H, 0x2),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ },
+ { {0x40, 0xdd88 } },
+ },
+ {
+ "LD_IND halfword negative offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x2),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ },
+ { {0x40, 0xbb66 } },
+ },
+ {
+ "LD_IND halfword unaligned",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_H, -0x1),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ },
+ { {0x40, 0x66cc } },
+ },
+ {
+ "LD_IND word positive offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_W, 0x4),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xee99ffaa } },
+ },
+ {
+ "LD_IND word negative offset",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x4),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xaa55bb66 } },
+ },
+ {
+ "LD_IND word unaligned (addr & 3 == 2)",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x2),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xbb66cc77 } },
+ },
+ {
+ "LD_IND word unaligned (addr & 3 == 1)",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x3),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0x55bb66cc } },
+ },
+ {
+ "LD_IND word unaligned (addr & 3 == 3)",
+ .u.insns = {
+ BPF_STMT(BPF_LDX | BPF_IMM, 0x20),
+ BPF_STMT(BPF_LD | BPF_IND | BPF_W, -0x1),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0x66cc77dd } },
+ },
+ {
+ "LD_ABS byte",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_B, 0x20),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xcc } },
+ },
+ {
+ "LD_ABS halfword",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x22),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xdd88 } },
+ },
+ {
+ "LD_ABS halfword unaligned",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_H, 0x25),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0x99ff } },
+ },
+ {
+ "LD_ABS word",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x1c),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xaa55bb66 } },
+ },
+ {
+ "LD_ABS word unaligned (addr & 3 == 2)",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x22),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0xdd88ee99 } },
+ },
+ {
+ "LD_ABS word unaligned (addr & 3 == 1)",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x21),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0x77dd88ee } },
+ },
+ {
+ "LD_ABS word unaligned (addr & 3 == 3)",
+ .u.insns = {
+ BPF_STMT(BPF_LD | BPF_ABS | BPF_W, 0x23),
+ BPF_STMT(BPF_RET | BPF_A, 0x0),
+ },
+ CLASSIC,
+ {
+ [0x1c] = 0xaa, [0x1d] = 0x55,
+ [0x1e] = 0xbb, [0x1f] = 0x66,
+ [0x20] = 0xcc, [0x21] = 0x77,
+ [0x22] = 0xdd, [0x23] = 0x88,
+ [0x24] = 0xee, [0x25] = 0x99,
+ [0x26] = 0xff, [0x27] = 0xaa,
+ },
+ { {0x40, 0x88ee99ff } },
+ },
};
static struct net_device dev;
--
1.9.1
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Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 0/6] test_bpf improvements Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
[PATCH 4/6] test_bpf: add module parameters to filter the tests to run. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
Re: [PATCH 4/6] test_bpf: add module parameters to filter the tests to run. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 18:00 +0200
Re: [PATCH 4/6] test_bpf: add module parameters to filter the tests to run. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 18:40 +0200
Re: [PATCH 4/6] test_bpf: add module parameters to filter the tests to run. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 18:40 +0200
[PATCH 3/6] test_bpf: test LD_ABS and LD_IND instructions on fragmented skbs. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
Re: [PATCH 3/6] test_bpf: test LD_ABS and LD_IND instructions on fragmented skbs. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 17:10 +0200
[PATCH 6/6] test_bpf: add tests checking that JIT/interpreter sets A and X to 0. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
Re: [PATCH 6/6] test_bpf: add tests checking that JIT/interpreter sets A and X to 0. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 17:10 +0200
[PATCH 5/6] test_bpf: add more tests for LD_ABS and LD_IND. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
Re: [PATCH 5/6] test_bpf: add more tests for LD_ABS and LD_IND. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 17:10 +0200
[PATCH 1/6] test_bpf: avoid oopsing the kernel when generate_test_data() fails. Nicolas Schichan <nschichan@freebox.fr> - 2015-08-03 16:10 +0200
Re: [PATCH 1/6] test_bpf: avoid oopsing the kernel when generate_test_data() fails. Daniel Borkmann <daniel@iogearbox.net> - 2015-08-03 16:50 +0200
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