1 {
2 "BPF_ATOMIC OR without fetch",
3 .insns = {
4 /* val = 0x110; */
5 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
6 /* atomic_or(&val, 0x011); */
7 BPF_MOV64_IMM(BPF_REG_1, 0x011),
8 BPF_ATOMIC_OP(BPF_DW, BPF_OR, BPF_REG_10, BPF_REG_1, -8),
9 /* if (val != 0x111) exit(2); */
10 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
11 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0x111, 2),
12 BPF_MOV64_IMM(BPF_REG_0, 2),
13 BPF_EXIT_INSN(),
14 /* r1 should not be clobbered, no BPF_FETCH flag */
15 BPF_MOV64_IMM(BPF_REG_0, 0),
16 BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x011, 1),
17 BPF_MOV64_IMM(BPF_REG_0, 1),
18 BPF_EXIT_INSN(),
19 },
20 .result = ACCEPT,
21 },
22 {
23 "BPF_ATOMIC OR with fetch",
24 .insns = {
25 BPF_MOV64_IMM(BPF_REG_0, 123),
26 /* val = 0x110; */
27 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
28 /* old = atomic_fetch_or(&val, 0x011); */
29 BPF_MOV64_IMM(BPF_REG_1, 0x011),
30 BPF_ATOMIC_OP(BPF_DW, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -8),
31 /* if (old != 0x110) exit(3); */
32 BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
33 BPF_MOV64_IMM(BPF_REG_0, 3),
34 BPF_EXIT_INSN(),
35 /* if (val != 0x111) exit(2); */
36 BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_10, -8),
37 BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x111, 2),
38 BPF_MOV64_IMM(BPF_REG_1, 2),
39 BPF_EXIT_INSN(),
40 /* Check R0 wasn't clobbered (for fear of x86 JIT bug) */
41 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 123, 2),
42 BPF_MOV64_IMM(BPF_REG_0, 1),
43 BPF_EXIT_INSN(),
44 /* exit(0); */
45 BPF_MOV64_IMM(BPF_REG_0, 0),
46 BPF_EXIT_INSN(),
47 },
48 .result = ACCEPT,
49 },
50 {
51 "BPF_ATOMIC OR with fetch 32bit",
52 .insns = {
53 /* r0 = (s64) -1 */
54 BPF_MOV64_IMM(BPF_REG_0, 0),
55 BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 1),
56 /* val = 0x110; */
57 BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x110),
58 /* old = atomic_fetch_or(&val, 0x011); */
59 BPF_MOV32_IMM(BPF_REG_1, 0x011),
60 BPF_ATOMIC_OP(BPF_W, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -4),
61 /* if (old != 0x110) exit(3); */
62 BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
63 BPF_MOV32_IMM(BPF_REG_0, 3),
64 BPF_EXIT_INSN(),
65 /* if (val != 0x111) exit(2); */
66 BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -4),
67 BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x111, 2),
68 BPF_MOV32_IMM(BPF_REG_1, 2),
69 BPF_EXIT_INSN(),
70 /* Check R0 wasn't clobbered (for fear of x86 JIT bug)
71 * It should be -1 so add 1 to get exit code.
72 */
73 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
74 BPF_EXIT_INSN(),
75 },
76 .result = ACCEPT,
77 },
78 {
79 "BPF_W atomic_fetch_or should zero top 32 bits",
80 .insns = {
81 /* r1 = U64_MAX; */
82 BPF_MOV64_IMM(BPF_REG_1, 0),
83 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1),
84 /* u64 val = r1; */
85 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
86 /* r1 = (u32)atomic_fetch_or((u32 *)&val, 2); */
87 BPF_MOV32_IMM(BPF_REG_1, 2),
88 BPF_ATOMIC_OP(BPF_W, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -8),
89 /* r2 = 0x00000000FFFFFFFF; */
90 BPF_MOV64_IMM(BPF_REG_2, 1),
91 BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 32),
92 BPF_ALU64_IMM(BPF_SUB, BPF_REG_2, 1),
93 /* if (r2 != r1) exit(1); */
94 BPF_JMP_REG(BPF_JEQ, BPF_REG_2, BPF_REG_1, 2),
95 BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
96 BPF_EXIT_INSN(),
97 /* exit(0); */
98 BPF_MOV32_IMM(BPF_REG_0, 0),
99 BPF_EXIT_INSN(),
100 },
101 .result = ACCEPT,
102 },
103
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