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