103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
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{
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"BPF_ATOMIC OR without fetch",
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.insns = {
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/* val = 0x110; */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
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/* atomic_or(&val, 0x011); */
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BPF_MOV64_IMM(BPF_REG_1, 0x011),
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BPF_ATOMIC_OP(BPF_DW, BPF_OR, BPF_REG_10, BPF_REG_1, -8),
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/* if (val != 0x111) exit(2); */
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0x111, 2),
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BPF_MOV64_IMM(BPF_REG_0, 2),
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BPF_EXIT_INSN(),
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/* r1 should not be clobbered, no BPF_FETCH flag */
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x011, 1),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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{
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"BPF_ATOMIC OR with fetch",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 123),
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/* val = 0x110; */
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
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/* old = atomic_fetch_or(&val, 0x011); */
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BPF_MOV64_IMM(BPF_REG_1, 0x011),
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BPF_ATOMIC_OP(BPF_DW, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -8),
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/* if (old != 0x110) exit(3); */
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
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BPF_MOV64_IMM(BPF_REG_0, 3),
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BPF_EXIT_INSN(),
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/* if (val != 0x111) exit(2); */
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BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_10, -8),
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x111, 2),
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BPF_MOV64_IMM(BPF_REG_1, 2),
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BPF_EXIT_INSN(),
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/* Check R0 wasn't clobbered (for fear of x86 JIT bug) */
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BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 123, 2),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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/* exit(0); */
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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{
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"BPF_ATOMIC OR with fetch 32bit",
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.insns = {
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/* r0 = (s64) -1 */
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 1),
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/* val = 0x110; */
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BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x110),
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/* old = atomic_fetch_or(&val, 0x011); */
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BPF_MOV32_IMM(BPF_REG_1, 0x011),
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BPF_ATOMIC_OP(BPF_W, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -4),
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/* if (old != 0x110) exit(3); */
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
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BPF_MOV32_IMM(BPF_REG_0, 3),
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BPF_EXIT_INSN(),
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/* if (val != 0x111) exit(2); */
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BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -4),
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BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x111, 2),
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BPF_MOV32_IMM(BPF_REG_1, 2),
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BPF_EXIT_INSN(),
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/* Check R0 wasn't clobbered (for fear of x86 JIT bug)
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* It should be -1 so add 1 to get exit code.
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*/
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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{
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"BPF_W atomic_fetch_or should zero top 32 bits",
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.insns = {
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/* r1 = U64_MAX; */
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1),
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/* u64 val = r1; */
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BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_1, -8),
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/* r1 = (u32)atomic_fetch_or((u32 *)&val, 2); */
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BPF_MOV32_IMM(BPF_REG_1, 2),
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BPF_ATOMIC_OP(BPF_W, BPF_OR | BPF_FETCH, BPF_REG_10, BPF_REG_1, -8),
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/* r2 = 0x00000000FFFFFFFF; */
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BPF_MOV64_IMM(BPF_REG_2, 1),
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BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 32),
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BPF_ALU64_IMM(BPF_SUB, BPF_REG_2, 1),
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/* if (r2 != r1) exit(1); */
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BPF_JMP_REG(BPF_JEQ, BPF_REG_2, BPF_REG_1, 2),
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BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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/* exit(0); */
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BPF_MOV32_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.result = ACCEPT,
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},
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