78 lines · c
1{2 "BPF_ATOMIC XOR without fetch",3 .insns = {4 /* val = 0x110; */5 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),6 /* atomic_xor(&val, 0x011); */7 BPF_MOV64_IMM(BPF_REG_1, 0x011),8 BPF_ATOMIC_OP(BPF_DW, BPF_XOR, BPF_REG_10, BPF_REG_1, -8),9 /* if (val != 0x101) exit(2); */10 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),11 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0x101, 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 XOR 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_xor(&val, 0x011); */29 BPF_MOV64_IMM(BPF_REG_1, 0x011),30 BPF_ATOMIC_OP(BPF_DW, BPF_XOR | 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 != 0x101) exit(2); */36 BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_10, -8),37 BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x101, 2),38 BPF_MOV64_IMM(BPF_REG_1, 2),39 BPF_EXIT_INSN(),40 /* Check R0 wasn't clobbered (fxor 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 XOR 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_xor(&val, 0x011); */59 BPF_MOV32_IMM(BPF_REG_1, 0x011),60 BPF_ATOMIC_OP(BPF_W, BPF_XOR | 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 != 0x101) exit(2); */66 BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -4),67 BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x101, 2),68 BPF_MOV32_IMM(BPF_REG_1, 2),69 BPF_EXIT_INSN(),70 /* Check R0 wasn't clobbered (fxor 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