arch/arm64_symbolization

ARM64 architecture-specific rules for symbolization

split_load(ea:address, nextea:address, dest:address, type:symbol)

Compute an immediate load performed across two consecutive instructions

• Uses: arch.load_operation, arch.store_operation, instruction, instruction_get_dest_op, instruction_get_op, next, op_immediate, op_indirect_mapped, op_regdirect_contains_reg, symbol

• Used by: __agg_subclause8, base_addr_offset_operand_candidate, symbol_minus_symbol, symbolic_operand_attribute, symbolic_operand_mips_candidate

• Recursive: litpool_symbolic_operand, __agg_single2, invalid, branch_to_calculated_pc_rel_addr, reg_used_for, data_block_limit, correlated_live_reg, inter_procedural_edge, value_reg_limit, no_value_reg_limit, init_symbol_minus_symbol_candidate_arm, start_function, jump_table_signed, stack_def_use.live_var_at_prior_used, arm_jump_table_block_start, code_in_block_candidate, wis_schedule_iter, split_load_operand, plt_block, base_relative_operand, next_function_entry_initial, stack_def_use.last_def_in_block, arch.reg_relative_load, data_in_code_propagate, must_fallthrough, jump_table_candidate, reg_has_got, block_instruction_next, negative_block_heuristic, relative_address_start, straight_line_def_used, data_in_code, reg_def_use.last_def_in_block, adjusts_stack_in_block, tls_desc_call, segment_target_range, next_block_in_byte_interval, next_type, discarded_block, block_points_proportional, __agg_single3, reg_def_use.live_var_used, instruction_memory_access_size, split_load_total_points, overlapping_instruction, value_reg_unsupported, jump_table_max, arm_jump_table_candidate, no_return_call, arm_jump_table_data_block, possible_target_from, arm_jump_table_skip_first_entry, self_contained_segment, call_target_has_other_fallthrough_inter, unresolved_block, indexed_pc_relative_load_relative, const_value_reg_used, block_last_instruction, __agg_single6, stack_def_use.live_var_at_block_end, straight_line_last_def, arch.simple_data_load, adrp_used, block, reg_def_use.live_var_at_block_end, reg_reg_arithmetic_operation_defs, jump_table_prelude, arm_jump_table_block_instruction, flags_and_jump_pair, plt_entry, simple_data_access_pattern, call_tls_get_addr, compare_and_jump_indirect_op_valid, block_points, reg_def_use.def_used, stack_def_use.live_var_used_in_block, arm_jump_table_data_block_limit, relative_address, split_load_candidate, data_block_candidate, base_relative_operation, value_reg_edge, block_total_points, compare_and_jump_immediate, compare_and_jump_indirect, def_used_for_address, split_load_point, fallthrough_over_padding, __agg_subclause6, split_load_conflict, got_relative_operand, reg_def_use.ambiguous_block_last_def, reg_def_use.block_last_def, known_block, may_fallthrough, relative_jump_table_entry_candidate, __agg_single10, reg_has_base_image, unresolved_interval_order, unresolved_interval, candidate_block_is_not_padding, inferred_main_dispatch, split_load_for_symbolization, stack_def_use.used_in_block, first_block_in_byte_interval, indefinite_litpool_ref, no_return_block, inferred_main_in_reg, incomplete_block, impossible_block, block_next, stack_base_reg_move, unlikely_have_symbolic_immediate, tls_get_addr, base_relative_jump, block_limit, padding_block_candidate, data_access, compare_and_jump_register, next_end, cinf_ldr_add_pc, block_candidate_boundaries, possible_target, block_candidate_dependency_edge, reg_def_use.live_var_at_prior_used, jump_table_candidate_refined, basic_target, stack_def_use.live_var_def, wis_prior, block_implies_block, block_boundaries, litpool_confidence, wis_has_prior, reg_def_use.return_block_end, symbol_minus_symbol_litpool_access_pattern, reg_def_use.flow_def, likely_fallthrough, stack_def_use.block_last_def, invalid_jump_table_candidate, cmp_defines, code_in_block_candidate_refined, hi_load_prop, wis_memo, overlap_with_litpool, resolved_reaches, reg_def_use.return_val_used, call_may_fallthrough_inter, function_inference.function_entry_initial, candidate_block_is_padding, __agg_subclause4, unresolved_block_overlap, padding_block_limit, stack_def_use.ref_in_block, init_ldr_add_pc, litpool_ref, discarded_split_load, value_reg, block_heuristic, reg_def_use.defined_in_block, initial_function_containing_return, reg_def_use.used_in_block, gp_relative_operand, stack_def_use.def_used, no_return_call_refined, jump_table_target, next_start, common_tail, symbolic_expr_from_relocation, tls_relative_operand_mips, block_overlap, contains_implausible_instr_seq, stack_def_use.defined_in_block, composite_data_access, contains_plausible_instr_seq, arm_jump_table_cmp_limit, relocation_adjustment, jump_table_start, relocation_adjustment_total, local_dynamic_tls_candidate, call_tls_get_addr_mips, stack_def_use.live_var_used, code_in_block, indexed_pc_relative_load, no_return_call_propagated, reg_def_use.ref_in_block, data_segment, is_padding, after_end, arm_jump_table_candidate_start, wis_schedule, nop_in_padding_candidate, reg_def_use.live_var_def, jump_table_element_access, split_load, __agg_subclause3, __agg_subclause2, reg_def_use.ambiguous_last_def_in_block, last_value_reg_limit, transition_block_limit, __agg_subclause7, arch.extend_load, initialized_data_segment, cmp_reg_to_reg, litpool_boundaries, reg_def_use.used

adrp_used(EA:address, Reg:register, UsedEA:address, Dest:address)

A reference to a page-aligned value loaded by an adr or adrp instruction.

EA: Address of the adr/adrp instruction Reg: The register that holds the used value UsedEA: Address where the value is used Dest: The destination address

We care primarily about adrp, but sometimes if the target is close enough, the assembler will substitute an adr to the page-aligned address instead.

Reg is not necessarily the register loaded by adrp! It may be the result of:

adrp x0, label mov x1, x0

UsedEA:

# x1 is used

and Reg would be x1

• Uses: arch.adr_dest, instruction

• Recursive: litpool_symbolic_operand, __agg_single2, invalid, branch_to_calculated_pc_rel_addr, reg_used_for, data_block_limit, correlated_live_reg, inter_procedural_edge, value_reg_limit, no_value_reg_limit, init_symbol_minus_symbol_candidate_arm, start_function, jump_table_signed, stack_def_use.live_var_at_prior_used, arm_jump_table_block_start, code_in_block_candidate, wis_schedule_iter, split_load_operand, plt_block, base_relative_operand, next_function_entry_initial, stack_def_use.last_def_in_block, arch.reg_relative_load, data_in_code_propagate, must_fallthrough, jump_table_candidate, reg_has_got, block_instruction_next, negative_block_heuristic, relative_address_start, straight_line_def_used, data_in_code, reg_def_use.last_def_in_block, adjusts_stack_in_block, tls_desc_call, segment_target_range, next_block_in_byte_interval, next_type, discarded_block, block_points_proportional, __agg_single3, reg_def_use.live_var_used, instruction_memory_access_size, split_load_total_points, overlapping_instruction, value_reg_unsupported, jump_table_max, arm_jump_table_candidate, no_return_call, arm_jump_table_data_block, possible_target_from, arm_jump_table_skip_first_entry, self_contained_segment, call_target_has_other_fallthrough_inter, unresolved_block, indexed_pc_relative_load_relative, const_value_reg_used, block_last_instruction, __agg_single6, stack_def_use.live_var_at_block_end, straight_line_last_def, arch.simple_data_load, adrp_used, block, reg_def_use.live_var_at_block_end, reg_reg_arithmetic_operation_defs, jump_table_prelude, arm_jump_table_block_instruction, flags_and_jump_pair, plt_entry, simple_data_access_pattern, call_tls_get_addr, compare_and_jump_indirect_op_valid, block_points, reg_def_use.def_used, stack_def_use.live_var_used_in_block, arm_jump_table_data_block_limit, relative_address, split_load_candidate, data_block_candidate, base_relative_operation, value_reg_edge, block_total_points, compare_and_jump_immediate, compare_and_jump_indirect, def_used_for_address, split_load_point, fallthrough_over_padding, __agg_subclause6, split_load_conflict, got_relative_operand, reg_def_use.ambiguous_block_last_def, reg_def_use.block_last_def, known_block, may_fallthrough, relative_jump_table_entry_candidate, __agg_single10, reg_has_base_image, unresolved_interval_order, unresolved_interval, candidate_block_is_not_padding, inferred_main_dispatch, split_load_for_symbolization, stack_def_use.used_in_block, first_block_in_byte_interval, indefinite_litpool_ref, no_return_block, inferred_main_in_reg, incomplete_block, impossible_block, block_next, stack_base_reg_move, unlikely_have_symbolic_immediate, tls_get_addr, base_relative_jump, block_limit, padding_block_candidate, data_access, compare_and_jump_register, next_end, cinf_ldr_add_pc, block_candidate_boundaries, possible_target, block_candidate_dependency_edge, reg_def_use.live_var_at_prior_used, jump_table_candidate_refined, basic_target, stack_def_use.live_var_def, wis_prior, block_implies_block, block_boundaries, litpool_confidence, wis_has_prior, reg_def_use.return_block_end, symbol_minus_symbol_litpool_access_pattern, reg_def_use.flow_def, likely_fallthrough, stack_def_use.block_last_def, invalid_jump_table_candidate, cmp_defines, code_in_block_candidate_refined, hi_load_prop, wis_memo, overlap_with_litpool, resolved_reaches, reg_def_use.return_val_used, call_may_fallthrough_inter, function_inference.function_entry_initial, candidate_block_is_padding, __agg_subclause4, unresolved_block_overlap, padding_block_limit, stack_def_use.ref_in_block, init_ldr_add_pc, litpool_ref, discarded_split_load, value_reg, block_heuristic, reg_def_use.defined_in_block, initial_function_containing_return, reg_def_use.used_in_block, gp_relative_operand, stack_def_use.def_used, no_return_call_refined, jump_table_target, next_start, common_tail, symbolic_expr_from_relocation, tls_relative_operand_mips, block_overlap, contains_implausible_instr_seq, stack_def_use.defined_in_block, composite_data_access, contains_plausible_instr_seq, arm_jump_table_cmp_limit, relocation_adjustment, jump_table_start, relocation_adjustment_total, local_dynamic_tls_candidate, call_tls_get_addr_mips, stack_def_use.live_var_used, code_in_block, indexed_pc_relative_load, no_return_call_propagated, reg_def_use.ref_in_block, data_segment, is_padding, after_end, arm_jump_table_candidate_start, wis_schedule, nop_in_padding_candidate, reg_def_use.live_var_def, jump_table_element_access, split_load, __agg_subclause3, __agg_subclause2, reg_def_use.ambiguous_last_def_in_block, last_value_reg_limit, transition_block_limit, __agg_subclause7, arch.extend_load, initialized_data_segment, cmp_reg_to_reg, litpool_boundaries, reg_def_use.used

split_load_tail(EA:address, Offset:number, Reg:register, Type:symbol)

An instruction which could be the second half of a split load.

• Uses: arch.memory_access, arch.reg_arithmetic_operation, instruction, op_immediate

• Used by: split_load_for_symbolization

split_load_for_symbolization(ea:address, nextea:address, dest:address, type:symbol)

This version of split_load uses def_used, so this should not be used for the code inference step due to cyclic negation issue. Instead, this is for the symbolization step.

• Uses: split_load_tail

• Used by: symbolic_operand_attribute

• Recursive: litpool_symbolic_operand, __agg_single2, invalid, branch_to_calculated_pc_rel_addr, reg_used_for, data_block_limit, correlated_live_reg, inter_procedural_edge, value_reg_limit, no_value_reg_limit, init_symbol_minus_symbol_candidate_arm, start_function, jump_table_signed, stack_def_use.live_var_at_prior_used, arm_jump_table_block_start, code_in_block_candidate, wis_schedule_iter, split_load_operand, plt_block, base_relative_operand, next_function_entry_initial, stack_def_use.last_def_in_block, arch.reg_relative_load, data_in_code_propagate, must_fallthrough, jump_table_candidate, reg_has_got, block_instruction_next, negative_block_heuristic, relative_address_start, straight_line_def_used, data_in_code, reg_def_use.last_def_in_block, adjusts_stack_in_block, tls_desc_call, segment_target_range, next_block_in_byte_interval, next_type, discarded_block, block_points_proportional, __agg_single3, reg_def_use.live_var_used, instruction_memory_access_size, split_load_total_points, overlapping_instruction, value_reg_unsupported, jump_table_max, arm_jump_table_candidate, no_return_call, arm_jump_table_data_block, possible_target_from, arm_jump_table_skip_first_entry, self_contained_segment, call_target_has_other_fallthrough_inter, unresolved_block, indexed_pc_relative_load_relative, const_value_reg_used, block_last_instruction, __agg_single6, stack_def_use.live_var_at_block_end, straight_line_last_def, arch.simple_data_load, adrp_used, block, reg_def_use.live_var_at_block_end, reg_reg_arithmetic_operation_defs, jump_table_prelude, arm_jump_table_block_instruction, flags_and_jump_pair, plt_entry, simple_data_access_pattern, call_tls_get_addr, compare_and_jump_indirect_op_valid, block_points, reg_def_use.def_used, stack_def_use.live_var_used_in_block, arm_jump_table_data_block_limit, relative_address, split_load_candidate, data_block_candidate, base_relative_operation, value_reg_edge, block_total_points, compare_and_jump_immediate, compare_and_jump_indirect, def_used_for_address, split_load_point, fallthrough_over_padding, __agg_subclause6, split_load_conflict, got_relative_operand, reg_def_use.ambiguous_block_last_def, reg_def_use.block_last_def, known_block, may_fallthrough, relative_jump_table_entry_candidate, __agg_single10, reg_has_base_image, unresolved_interval_order, unresolved_interval, candidate_block_is_not_padding, inferred_main_dispatch, split_load_for_symbolization, stack_def_use.used_in_block, first_block_in_byte_interval, indefinite_litpool_ref, no_return_block, inferred_main_in_reg, incomplete_block, impossible_block, block_next, stack_base_reg_move, unlikely_have_symbolic_immediate, tls_get_addr, base_relative_jump, block_limit, padding_block_candidate, data_access, compare_and_jump_register, next_end, cinf_ldr_add_pc, block_candidate_boundaries, possible_target, block_candidate_dependency_edge, reg_def_use.live_var_at_prior_used, jump_table_candidate_refined, basic_target, stack_def_use.live_var_def, wis_prior, block_implies_block, block_boundaries, litpool_confidence, wis_has_prior, reg_def_use.return_block_end, symbol_minus_symbol_litpool_access_pattern, reg_def_use.flow_def, likely_fallthrough, stack_def_use.block_last_def, invalid_jump_table_candidate, cmp_defines, code_in_block_candidate_refined, hi_load_prop, wis_memo, overlap_with_litpool, resolved_reaches, reg_def_use.return_val_used, call_may_fallthrough_inter, function_inference.function_entry_initial, candidate_block_is_padding, __agg_subclause4, unresolved_block_overlap, padding_block_limit, stack_def_use.ref_in_block, init_ldr_add_pc, litpool_ref, discarded_split_load, value_reg, block_heuristic, reg_def_use.defined_in_block, initial_function_containing_return, reg_def_use.used_in_block, gp_relative_operand, stack_def_use.def_used, no_return_call_refined, jump_table_target, next_start, common_tail, symbolic_expr_from_relocation, tls_relative_operand_mips, block_overlap, contains_implausible_instr_seq, stack_def_use.defined_in_block, composite_data_access, contains_plausible_instr_seq, arm_jump_table_cmp_limit, relocation_adjustment, jump_table_start, relocation_adjustment_total, local_dynamic_tls_candidate, call_tls_get_addr_mips, stack_def_use.live_var_used, code_in_block, indexed_pc_relative_load, no_return_call_propagated, reg_def_use.ref_in_block, data_segment, is_padding, after_end, arm_jump_table_candidate_start, wis_schedule, nop_in_padding_candidate, reg_def_use.live_var_def, jump_table_element_access, split_load, __agg_subclause3, __agg_subclause2, reg_def_use.ambiguous_last_def_in_block, last_value_reg_limit, transition_block_limit, __agg_subclause7, arch.extend_load, initialized_data_segment, cmp_reg_to_reg, litpool_boundaries, reg_def_use.used

lo_reloc_index(RelocType:symbol, OpIndex:unsigned)

OpIndex: operand index for the corresponding relocation

• Used by: symbolic_expr_from_relocation, symbolic_operand_attribute

movz_movk_insn(EA:address, Reg:register, Val:number, ShiftMask:unsigned, Operation:symbol)

Individual MOVZ or MOVK instruction with its 16-bit immediate and shift.

• Uses: arch.move_reg_imm, instruction, op_shifted

• Used by: movz_movk_chain, symbolic_operand_attribute, symbolic_operand_candidate

movz_movk_chain(EA_first:address, EA_last:address, Reg:register, Value:number, UsedShiftMask:unsigned, Count:unsigned)

A chain of MOVZ followed by one or more MOVKs to the same register. EA_first is always the MOVZ instruction. EA_last is the final instruction in the chain. Value is the accumulated 64-bit constant constructed from all instructions. UsedShiftMask tracks which 16-bit lanes have been written. Count is the number of instructions in the chain (1-4).

• Uses: movz_movk_insn, next

• Used by: movz_movk_complete, movz_movk_member

• Recursive: movz_movk_chain

movz_movk_complete(EA_first:address, EA_last:address, Value:number)

The longest complete MOVZ+MOVK chain: a chain that cannot be extended further. This is the one we use for symbolization.

• Uses: movz_movk_chain

• Used by: may_have_symbolic_immediate, movz_movk_member, symbolic_operand_attribute, symbolic_operand_candidate

movz_movk_member(EA:address, EA_first:address, EA_last:address)

Helper: is EA part of a complete MOVZ+MOVK chain?

• Uses: movz_movk_chain, movz_movk_complete

• Used by: may_have_symbolic_immediate, symbolic_operand_attribute, symbolic_operand_candidate, unlikely_have_symbolic_immediate

movz_movk_shift_group(ShiftMask:unsigned, Group:symbol)

Helper: map a shift amount to the corresponding group attribute name.

• Used by: symbolic_operand_attribute, symbolic_operand_candidate