| { |
| "bpf_get_stack return R0 within range", |
| .insns = { |
| BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), |
| BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), |
| BPF_LD_MAP_FD(BPF_REG_1, 0), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), |
| BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 28), |
| BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), |
| BPF_MOV64_IMM(BPF_REG_9, sizeof(struct test_val)/2), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_7), |
| BPF_MOV64_IMM(BPF_REG_3, sizeof(struct test_val)/2), |
| BPF_MOV64_IMM(BPF_REG_4, 256), |
| BPF_EMIT_CALL(BPF_FUNC_get_stack), |
| BPF_MOV64_IMM(BPF_REG_1, 0), |
| BPF_MOV64_REG(BPF_REG_8, BPF_REG_0), |
| BPF_ALU64_IMM(BPF_LSH, BPF_REG_8, 32), |
| BPF_ALU64_IMM(BPF_ARSH, BPF_REG_8, 32), |
| BPF_JMP_REG(BPF_JSGT, BPF_REG_1, BPF_REG_8, 16), |
| BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_8), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_7), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_8), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_9), |
| BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 32), |
| BPF_ALU64_IMM(BPF_ARSH, BPF_REG_1, 32), |
| BPF_MOV64_REG(BPF_REG_3, BPF_REG_2), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_3, BPF_REG_1), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| BPF_MOV64_IMM(BPF_REG_5, sizeof(struct test_val)/2), |
| BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_5), |
| BPF_JMP_REG(BPF_JGE, BPF_REG_3, BPF_REG_1, 4), |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), |
| BPF_MOV64_REG(BPF_REG_3, BPF_REG_9), |
| BPF_MOV64_IMM(BPF_REG_4, 0), |
| BPF_EMIT_CALL(BPF_FUNC_get_stack), |
| BPF_EXIT_INSN(), |
| }, |
| .fixup_map_hash_48b = { 4 }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_TRACEPOINT, |
| }, |
| { |
| "bpf_get_task_stack return R0 range is refined", |
| .insns = { |
| BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), |
| BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_6, 0), // ctx->meta->seq |
| BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_1, 8), // ctx->task |
| BPF_LD_MAP_FD(BPF_REG_1, 0), // fixup_map_array_48b |
| BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), |
| BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), |
| BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| BPF_JMP_IMM(BPF_JNE, BPF_REG_7, 0, 2), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_7), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), |
| BPF_MOV64_REG(BPF_REG_9, BPF_REG_0), // keep buf for seq_write |
| BPF_MOV64_IMM(BPF_REG_3, 48), |
| BPF_MOV64_IMM(BPF_REG_4, 0), |
| BPF_EMIT_CALL(BPF_FUNC_get_task_stack), |
| BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 0, 2), |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| |
| BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), |
| BPF_MOV64_REG(BPF_REG_2, BPF_REG_9), |
| BPF_MOV64_REG(BPF_REG_3, BPF_REG_0), |
| BPF_EMIT_CALL(BPF_FUNC_seq_write), |
| |
| BPF_MOV64_IMM(BPF_REG_0, 0), |
| BPF_EXIT_INSN(), |
| }, |
| .result = ACCEPT, |
| .prog_type = BPF_PROG_TYPE_TRACING, |
| .expected_attach_type = BPF_TRACE_ITER, |
| .kfunc = "task", |
| .runs = -1, // Don't run, just load |
| .fixup_map_array_48b = { 3 }, |
| }, |
