noreturn

incomplete_block(Block:address)

This module performs an early noreturn analysis after code inference but before use-def analysis begins. It is intended to eliminate CFG edges that may otherwise produce spurious def_used instances.

Uses: arch.return, indirect_jump, pc_relative_jump, reg_jump

Recursive: unresolved_block, litpool_ref, negative_block_heuristic, reg_def_use.used, contains_implausible_instr_seq, padding_block_candidate, block_instruction_next, arm_jump_table_candidate_start, block_candidate_boundaries, impossible_block, arch.reg_relative_load, wis_schedule, reg_has_base_image, split_load_conflict, possible_target_from, wis_has_prior, straight_line_def_used, __agg_subclause6, init_symbol_minus_symbol_candidate_arm, base_relative_operation, straight_line_last_def, unresolved_interval_order, stack_def_use.live_var_used, unresolved_block_overlap, reg_def_use.ambiguous_block_last_def, correlated_live_reg, litpool_symbolic_operand, data_in_code_propagate, split_load_point, relative_address, __agg_subclause3, cmp_reg_to_reg, plt_block, compare_and_jump_indirect_op_valid, data_block_candidate, reg_def_use.live_var_at_prior_used, no_return_call, split_load_operand, common_tail, no_return_call_refined, value_reg_unsupported, cinf_ldr_add_pc, stack_def_use.last_def_in_block, next_start, block_points_proportional, tls_desc_call, code_in_block, reg_def_use.live_var_used, data_in_code, split_load_for_symbolization, incomplete_block, base_relative_jump, unlikely_have_symbolic_immediate, base_relative_operand, arm_jump_table_candidate, jump_table_candidate_refined, split_load_total_points, next_block_in_byte_interval, discarded_block, reg_def_use.return_val_used, adrp_used, indefinite_litpool_ref, reg_def_use.live_var_def, relative_address_start, reg_def_use.ref_in_block, block_points, arch.extend_load, block_boundaries, data_access, candidate_block_is_padding, instruction_memory_access_size, function_inference.function_entry_initial, indexed_pc_relative_load, wis_schedule_iter, init_ldr_add_pc, call_tls_get_addr, unresolved_interval, data_block_limit, segment_target_range, const_value_reg_used, __agg_single2, compare_and_jump_register, is_padding, jump_table_start, relocation_adjustment_total, stack_def_use.live_var_def, cmp_defines, after_end, reg_has_got, overlap_with_litpool, no_return_call_propagated, invalid, invalid_jump_table_candidate, data_segment, inter_procedural_edge, block_last_instruction, must_fallthrough, padding_block_limit, block_limit, wis_prior, block_overlap, symbol_minus_symbol_litpool_access_pattern, arm_jump_table_block_start, no_return_block, initialized_data_segment, branch_to_calculated_pc_rel_addr, litpool_boundaries, jump_table_target, arm_jump_table_cmp_limit, stack_def_use.block_last_def, no_value_reg_limit, block_heuristic, reg_used_for, possible_target, reg_def_use.live_var_at_block_end, hi_load_prop, indexed_pc_relative_load_relative, relocation_adjustment, arm_jump_table_data_block, composite_data_access, code_in_block_candidate_refined, tls_get_addr, value_reg_edge, value_reg, __agg_subclause7, known_block, resolved_reaches, block, block_next, gp_relative_operand, jump_table_signed, symbolic_expr_from_relocation, reg_def_use.block_last_def, __agg_subclause2, likely_fallthrough, last_value_reg_limit, reg_def_use.flow_def, split_load_candidate, jump_table_max, __agg_single3, jump_table_candidate, compare_and_jump_indirect, block_implies_block, reg_def_use.def_used, reg_reg_arithmetic_operation_defs, next_type, self_contained_segment, arch.simple_data_load, block_total_points, def_used_for_address, relative_jump_table_entry_candidate, may_fallthrough, basic_target, candidate_block_is_not_padding, reg_def_use.last_def_in_block, wis_memo, block_candidate_dependency_edge, stack_def_use.used_in_block, stack_base_reg_move, inferred_main_dispatch, reg_def_use.defined_in_block, stack_def_use.def_used, code_in_block_candidate, overlapping_instruction, arm_jump_table_block_instruction, first_block_in_byte_interval, jump_table_prelude, arm_jump_table_skip_first_entry, contains_plausible_instr_seq, stack_def_use.ref_in_block, transition_block_limit, inferred_main_in_reg, reg_def_use.ambiguous_last_def_in_block, next_end, stack_def_use.live_var_at_block_end, discarded_split_load, simple_data_access_pattern, start_function, got_relative_operand, value_reg_limit, adjusts_stack_in_block, split_load, arm_jump_table_data_block_limit, flags_and_jump_pair, stack_def_use.live_var_used_in_block, litpool_confidence, reg_def_use.used_in_block, jump_table_element_access, __agg_single6, stack_def_use.defined_in_block, stack_def_use.live_var_at_prior_used, plt_entry, reg_def_use.return_block_end, nop_in_padding_candidate, compare_and_jump_immediate

direct_or_pcrel_jump(Src:address, Dest:address)

segment_target_range(Beg:address, End:address, Tmax:address)

The segment between [Beg,End] does not have any indirect targets or return instructions and all the direct targets are between Beg and Tmax

If End > Tmax, then we can say that the segment is self-contained, which means that the only way to step out of it is through a fallthrough in the last block

Uses: direct_jump, direct_or_pcrel_jump

Recursive: unresolved_block, litpool_ref, negative_block_heuristic, reg_def_use.used, contains_implausible_instr_seq, padding_block_candidate, block_instruction_next, arm_jump_table_candidate_start, block_candidate_boundaries, impossible_block, arch.reg_relative_load, wis_schedule, reg_has_base_image, split_load_conflict, possible_target_from, wis_has_prior, straight_line_def_used, __agg_subclause6, init_symbol_minus_symbol_candidate_arm, base_relative_operation, straight_line_last_def, unresolved_interval_order, stack_def_use.live_var_used, unresolved_block_overlap, reg_def_use.ambiguous_block_last_def, correlated_live_reg, litpool_symbolic_operand, data_in_code_propagate, split_load_point, relative_address, __agg_subclause3, cmp_reg_to_reg, plt_block, compare_and_jump_indirect_op_valid, data_block_candidate, reg_def_use.live_var_at_prior_used, no_return_call, split_load_operand, common_tail, no_return_call_refined, value_reg_unsupported, cinf_ldr_add_pc, stack_def_use.last_def_in_block, next_start, block_points_proportional, tls_desc_call, code_in_block, reg_def_use.live_var_used, data_in_code, split_load_for_symbolization, incomplete_block, base_relative_jump, unlikely_have_symbolic_immediate, base_relative_operand, arm_jump_table_candidate, jump_table_candidate_refined, split_load_total_points, next_block_in_byte_interval, discarded_block, reg_def_use.return_val_used, adrp_used, indefinite_litpool_ref, reg_def_use.live_var_def, relative_address_start, reg_def_use.ref_in_block, block_points, arch.extend_load, block_boundaries, data_access, candidate_block_is_padding, instruction_memory_access_size, function_inference.function_entry_initial, indexed_pc_relative_load, wis_schedule_iter, init_ldr_add_pc, call_tls_get_addr, unresolved_interval, data_block_limit, segment_target_range, const_value_reg_used, __agg_single2, compare_and_jump_register, is_padding, jump_table_start, relocation_adjustment_total, stack_def_use.live_var_def, cmp_defines, after_end, reg_has_got, overlap_with_litpool, no_return_call_propagated, invalid, invalid_jump_table_candidate, data_segment, inter_procedural_edge, block_last_instruction, must_fallthrough, padding_block_limit, block_limit, wis_prior, block_overlap, symbol_minus_symbol_litpool_access_pattern, arm_jump_table_block_start, no_return_block, initialized_data_segment, branch_to_calculated_pc_rel_addr, litpool_boundaries, jump_table_target, arm_jump_table_cmp_limit, stack_def_use.block_last_def, no_value_reg_limit, block_heuristic, reg_used_for, possible_target, reg_def_use.live_var_at_block_end, hi_load_prop, indexed_pc_relative_load_relative, relocation_adjustment, arm_jump_table_data_block, composite_data_access, code_in_block_candidate_refined, tls_get_addr, value_reg_edge, value_reg, __agg_subclause7, known_block, resolved_reaches, block, block_next, gp_relative_operand, jump_table_signed, symbolic_expr_from_relocation, reg_def_use.block_last_def, __agg_subclause2, likely_fallthrough, last_value_reg_limit, reg_def_use.flow_def, split_load_candidate, jump_table_max, __agg_single3, jump_table_candidate, compare_and_jump_indirect, block_implies_block, reg_def_use.def_used, reg_reg_arithmetic_operation_defs, next_type, self_contained_segment, arch.simple_data_load, block_total_points, def_used_for_address, relative_jump_table_entry_candidate, may_fallthrough, basic_target, candidate_block_is_not_padding, reg_def_use.last_def_in_block, wis_memo, block_candidate_dependency_edge, stack_def_use.used_in_block, stack_base_reg_move, inferred_main_dispatch, reg_def_use.defined_in_block, stack_def_use.def_used, code_in_block_candidate, overlapping_instruction, arm_jump_table_block_instruction, first_block_in_byte_interval, jump_table_prelude, arm_jump_table_skip_first_entry, contains_plausible_instr_seq, stack_def_use.ref_in_block, transition_block_limit, inferred_main_in_reg, reg_def_use.ambiguous_last_def_in_block, next_end, stack_def_use.live_var_at_block_end, discarded_split_load, simple_data_access_pattern, start_function, got_relative_operand, value_reg_limit, adjusts_stack_in_block, split_load, arm_jump_table_data_block_limit, flags_and_jump_pair, stack_def_use.live_var_used_in_block, litpool_confidence, reg_def_use.used_in_block, jump_table_element_access, __agg_single6, stack_def_use.defined_in_block, stack_def_use.live_var_at_prior_used, plt_entry, reg_def_use.return_block_end, nop_in_padding_candidate, compare_and_jump_immediate

self_contained_segment(Beg:address, End:address)

no_return_block(EA:address)

No-return blocks.

This is a underapproximation, since it cannot propagate through jumptables or indirect calls (which are not yet resolved), or could call library functions that are not known to be no-return.

The only situation where it would generate false-positive noreturns is if a “known noreturn” library function does, in fact, return.

Uses: direct_call

Recursive: unresolved_block, litpool_ref, negative_block_heuristic, reg_def_use.used, contains_implausible_instr_seq, padding_block_candidate, block_instruction_next, arm_jump_table_candidate_start, block_candidate_boundaries, impossible_block, arch.reg_relative_load, wis_schedule, reg_has_base_image, split_load_conflict, possible_target_from, wis_has_prior, straight_line_def_used, __agg_subclause6, init_symbol_minus_symbol_candidate_arm, base_relative_operation, straight_line_last_def, unresolved_interval_order, stack_def_use.live_var_used, unresolved_block_overlap, reg_def_use.ambiguous_block_last_def, correlated_live_reg, litpool_symbolic_operand, data_in_code_propagate, split_load_point, relative_address, __agg_subclause3, cmp_reg_to_reg, plt_block, compare_and_jump_indirect_op_valid, data_block_candidate, reg_def_use.live_var_at_prior_used, no_return_call, split_load_operand, common_tail, no_return_call_refined, value_reg_unsupported, cinf_ldr_add_pc, stack_def_use.last_def_in_block, next_start, block_points_proportional, tls_desc_call, code_in_block, reg_def_use.live_var_used, data_in_code, split_load_for_symbolization, incomplete_block, base_relative_jump, unlikely_have_symbolic_immediate, base_relative_operand, arm_jump_table_candidate, jump_table_candidate_refined, split_load_total_points, next_block_in_byte_interval, discarded_block, reg_def_use.return_val_used, adrp_used, indefinite_litpool_ref, reg_def_use.live_var_def, relative_address_start, reg_def_use.ref_in_block, block_points, arch.extend_load, block_boundaries, data_access, candidate_block_is_padding, instruction_memory_access_size, function_inference.function_entry_initial, indexed_pc_relative_load, wis_schedule_iter, init_ldr_add_pc, call_tls_get_addr, unresolved_interval, data_block_limit, segment_target_range, const_value_reg_used, __agg_single2, compare_and_jump_register, is_padding, jump_table_start, relocation_adjustment_total, stack_def_use.live_var_def, cmp_defines, after_end, reg_has_got, overlap_with_litpool, no_return_call_propagated, invalid, invalid_jump_table_candidate, data_segment, inter_procedural_edge, block_last_instruction, must_fallthrough, padding_block_limit, block_limit, wis_prior, block_overlap, symbol_minus_symbol_litpool_access_pattern, arm_jump_table_block_start, no_return_block, initialized_data_segment, branch_to_calculated_pc_rel_addr, litpool_boundaries, jump_table_target, arm_jump_table_cmp_limit, stack_def_use.block_last_def, no_value_reg_limit, block_heuristic, reg_used_for, possible_target, reg_def_use.live_var_at_block_end, hi_load_prop, indexed_pc_relative_load_relative, relocation_adjustment, arm_jump_table_data_block, composite_data_access, code_in_block_candidate_refined, tls_get_addr, value_reg_edge, value_reg, __agg_subclause7, known_block, resolved_reaches, block, block_next, gp_relative_operand, jump_table_signed, symbolic_expr_from_relocation, reg_def_use.block_last_def, __agg_subclause2, likely_fallthrough, last_value_reg_limit, reg_def_use.flow_def, split_load_candidate, jump_table_max, __agg_single3, jump_table_candidate, compare_and_jump_indirect, block_implies_block, reg_def_use.def_used, reg_reg_arithmetic_operation_defs, next_type, self_contained_segment, arch.simple_data_load, block_total_points, def_used_for_address, relative_jump_table_entry_candidate, may_fallthrough, basic_target, candidate_block_is_not_padding, reg_def_use.last_def_in_block, wis_memo, block_candidate_dependency_edge, stack_def_use.used_in_block, stack_base_reg_move, inferred_main_dispatch, reg_def_use.defined_in_block, stack_def_use.def_used, code_in_block_candidate, overlapping_instruction, arm_jump_table_block_instruction, first_block_in_byte_interval, jump_table_prelude, arm_jump_table_skip_first_entry, contains_plausible_instr_seq, stack_def_use.ref_in_block, transition_block_limit, inferred_main_in_reg, reg_def_use.ambiguous_last_def_in_block, next_end, stack_def_use.live_var_at_block_end, discarded_split_load, simple_data_access_pattern, start_function, got_relative_operand, value_reg_limit, adjusts_stack_in_block, split_load, arm_jump_table_data_block_limit, flags_and_jump_pair, stack_def_use.live_var_used_in_block, litpool_confidence, reg_def_use.used_in_block, jump_table_element_access, __agg_single6, stack_def_use.defined_in_block, stack_def_use.live_var_at_prior_used, plt_entry, reg_def_use.return_block_end, nop_in_padding_candidate, compare_and_jump_immediate

no_return_call_refined(EA:address)

Calls to known no return functions or their PLT blocks.

Uses: direct_call, no_return_function

Recursive: unresolved_block, litpool_ref, negative_block_heuristic, reg_def_use.used, contains_implausible_instr_seq, padding_block_candidate, block_instruction_next, arm_jump_table_candidate_start, block_candidate_boundaries, impossible_block, arch.reg_relative_load, wis_schedule, reg_has_base_image, split_load_conflict, possible_target_from, wis_has_prior, straight_line_def_used, __agg_subclause6, init_symbol_minus_symbol_candidate_arm, base_relative_operation, straight_line_last_def, unresolved_interval_order, stack_def_use.live_var_used, unresolved_block_overlap, reg_def_use.ambiguous_block_last_def, correlated_live_reg, litpool_symbolic_operand, data_in_code_propagate, split_load_point, relative_address, __agg_subclause3, cmp_reg_to_reg, plt_block, compare_and_jump_indirect_op_valid, data_block_candidate, reg_def_use.live_var_at_prior_used, no_return_call, split_load_operand, common_tail, no_return_call_refined, value_reg_unsupported, cinf_ldr_add_pc, stack_def_use.last_def_in_block, next_start, block_points_proportional, tls_desc_call, code_in_block, reg_def_use.live_var_used, data_in_code, split_load_for_symbolization, incomplete_block, base_relative_jump, unlikely_have_symbolic_immediate, base_relative_operand, arm_jump_table_candidate, jump_table_candidate_refined, split_load_total_points, next_block_in_byte_interval, discarded_block, reg_def_use.return_val_used, adrp_used, indefinite_litpool_ref, reg_def_use.live_var_def, relative_address_start, reg_def_use.ref_in_block, block_points, arch.extend_load, block_boundaries, data_access, candidate_block_is_padding, instruction_memory_access_size, function_inference.function_entry_initial, indexed_pc_relative_load, wis_schedule_iter, init_ldr_add_pc, call_tls_get_addr, unresolved_interval, data_block_limit, segment_target_range, const_value_reg_used, __agg_single2, compare_and_jump_register, is_padding, jump_table_start, relocation_adjustment_total, stack_def_use.live_var_def, cmp_defines, after_end, reg_has_got, overlap_with_litpool, no_return_call_propagated, invalid, invalid_jump_table_candidate, data_segment, inter_procedural_edge, block_last_instruction, must_fallthrough, padding_block_limit, block_limit, wis_prior, block_overlap, symbol_minus_symbol_litpool_access_pattern, arm_jump_table_block_start, no_return_block, initialized_data_segment, branch_to_calculated_pc_rel_addr, litpool_boundaries, jump_table_target, arm_jump_table_cmp_limit, stack_def_use.block_last_def, no_value_reg_limit, block_heuristic, reg_used_for, possible_target, reg_def_use.live_var_at_block_end, hi_load_prop, indexed_pc_relative_load_relative, relocation_adjustment, arm_jump_table_data_block, composite_data_access, code_in_block_candidate_refined, tls_get_addr, value_reg_edge, value_reg, __agg_subclause7, known_block, resolved_reaches, block, block_next, gp_relative_operand, jump_table_signed, symbolic_expr_from_relocation, reg_def_use.block_last_def, __agg_subclause2, likely_fallthrough, last_value_reg_limit, reg_def_use.flow_def, split_load_candidate, jump_table_max, __agg_single3, jump_table_candidate, compare_and_jump_indirect, block_implies_block, reg_def_use.def_used, reg_reg_arithmetic_operation_defs, next_type, self_contained_segment, arch.simple_data_load, block_total_points, def_used_for_address, relative_jump_table_entry_candidate, may_fallthrough, basic_target, candidate_block_is_not_padding, reg_def_use.last_def_in_block, wis_memo, block_candidate_dependency_edge, stack_def_use.used_in_block, stack_base_reg_move, inferred_main_dispatch, reg_def_use.defined_in_block, stack_def_use.def_used, code_in_block_candidate, overlapping_instruction, arm_jump_table_block_instruction, first_block_in_byte_interval, jump_table_prelude, arm_jump_table_skip_first_entry, contains_plausible_instr_seq, stack_def_use.ref_in_block, transition_block_limit, inferred_main_in_reg, reg_def_use.ambiguous_last_def_in_block, next_end, stack_def_use.live_var_at_block_end, discarded_split_load, simple_data_access_pattern, start_function, got_relative_operand, value_reg_limit, adjusts_stack_in_block, split_load, arm_jump_table_data_block_limit, flags_and_jump_pair, stack_def_use.live_var_used_in_block, litpool_confidence, reg_def_use.used_in_block, jump_table_element_access, __agg_single6, stack_def_use.defined_in_block, stack_def_use.live_var_at_prior_used, plt_entry, reg_def_use.return_block_end, nop_in_padding_candidate, compare_and_jump_immediate

no_return_call_propagated(EA:address)

Calls to noreturn blocks.

Uses: direct_call, pc_load_call

Used by: cfg_edge

Recursive: unresolved_block, litpool_ref, negative_block_heuristic, reg_def_use.used, contains_implausible_instr_seq, padding_block_candidate, block_instruction_next, arm_jump_table_candidate_start, block_candidate_boundaries, impossible_block, arch.reg_relative_load, wis_schedule, reg_has_base_image, split_load_conflict, possible_target_from, wis_has_prior, straight_line_def_used, __agg_subclause6, init_symbol_minus_symbol_candidate_arm, base_relative_operation, straight_line_last_def, unresolved_interval_order, stack_def_use.live_var_used, unresolved_block_overlap, reg_def_use.ambiguous_block_last_def, correlated_live_reg, litpool_symbolic_operand, data_in_code_propagate, split_load_point, relative_address, __agg_subclause3, cmp_reg_to_reg, plt_block, compare_and_jump_indirect_op_valid, data_block_candidate, reg_def_use.live_var_at_prior_used, no_return_call, split_load_operand, common_tail, no_return_call_refined, value_reg_unsupported, cinf_ldr_add_pc, stack_def_use.last_def_in_block, next_start, block_points_proportional, tls_desc_call, code_in_block, reg_def_use.live_var_used, data_in_code, split_load_for_symbolization, incomplete_block, base_relative_jump, unlikely_have_symbolic_immediate, base_relative_operand, arm_jump_table_candidate, jump_table_candidate_refined, split_load_total_points, next_block_in_byte_interval, discarded_block, reg_def_use.return_val_used, adrp_used, indefinite_litpool_ref, reg_def_use.live_var_def, relative_address_start, reg_def_use.ref_in_block, block_points, arch.extend_load, block_boundaries, data_access, candidate_block_is_padding, instruction_memory_access_size, function_inference.function_entry_initial, indexed_pc_relative_load, wis_schedule_iter, init_ldr_add_pc, call_tls_get_addr, unresolved_interval, data_block_limit, segment_target_range, const_value_reg_used, __agg_single2, compare_and_jump_register, is_padding, jump_table_start, relocation_adjustment_total, stack_def_use.live_var_def, cmp_defines, after_end, reg_has_got, overlap_with_litpool, no_return_call_propagated, invalid, invalid_jump_table_candidate, data_segment, inter_procedural_edge, block_last_instruction, must_fallthrough, padding_block_limit, block_limit, wis_prior, block_overlap, symbol_minus_symbol_litpool_access_pattern, arm_jump_table_block_start, no_return_block, initialized_data_segment, branch_to_calculated_pc_rel_addr, litpool_boundaries, jump_table_target, arm_jump_table_cmp_limit, stack_def_use.block_last_def, no_value_reg_limit, block_heuristic, reg_used_for, possible_target, reg_def_use.live_var_at_block_end, hi_load_prop, indexed_pc_relative_load_relative, relocation_adjustment, arm_jump_table_data_block, composite_data_access, code_in_block_candidate_refined, tls_get_addr, value_reg_edge, value_reg, __agg_subclause7, known_block, resolved_reaches, block, block_next, gp_relative_operand, jump_table_signed, symbolic_expr_from_relocation, reg_def_use.block_last_def, __agg_subclause2, likely_fallthrough, last_value_reg_limit, reg_def_use.flow_def, split_load_candidate, jump_table_max, __agg_single3, jump_table_candidate, compare_and_jump_indirect, block_implies_block, reg_def_use.def_used, reg_reg_arithmetic_operation_defs, next_type, self_contained_segment, arch.simple_data_load, block_total_points, def_used_for_address, relative_jump_table_entry_candidate, may_fallthrough, basic_target, candidate_block_is_not_padding, reg_def_use.last_def_in_block, wis_memo, block_candidate_dependency_edge, stack_def_use.used_in_block, stack_base_reg_move, inferred_main_dispatch, reg_def_use.defined_in_block, stack_def_use.def_used, code_in_block_candidate, overlapping_instruction, arm_jump_table_block_instruction, first_block_in_byte_interval, jump_table_prelude, arm_jump_table_skip_first_entry, contains_plausible_instr_seq, stack_def_use.ref_in_block, transition_block_limit, inferred_main_in_reg, reg_def_use.ambiguous_last_def_in_block, next_end, stack_def_use.live_var_at_block_end, discarded_split_load, simple_data_access_pattern, start_function, got_relative_operand, value_reg_limit, adjusts_stack_in_block, split_load, arm_jump_table_data_block_limit, flags_and_jump_pair, stack_def_use.live_var_used_in_block, litpool_confidence, reg_def_use.used_in_block, jump_table_element_access, __agg_single6, stack_def_use.defined_in_block, stack_def_use.live_var_at_prior_used, plt_entry, reg_def_use.return_block_end, nop_in_padding_candidate, compare_and_jump_immediate