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swift-mirror/stdlib/public/RuntimeModule/modules/ImageFormats/Dwarf/dwarf.h
Alastair Houghton 760cc57bef [Backtracing] Rename _Backtracing to Runtime. 
Move the backtracing code into a new Runtime module.  This means renaming
the Swift Runtime's CMake target because otherwise there will be a name
clash.

rdar://124913332
2025-01-17 10:09:36 +00:00

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//===--- dwarf.h - Definitions of DWARF structures for import into Swift --===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// Definitions of DWARF structures for import into Swift code
//
// The types here are taken from the DWARF 5 specification, from
// <https://dwarfstd.org>
//
//===----------------------------------------------------------------------===//
#ifndef SWIFT_DWARF_H
#define SWIFT_DWARF_H
#include <inttypes.h>
#ifdef __cplusplus
namespace swift {
namespace runtime {
#endif
#pragma pack(push, 1)
/* .. Useful macros ......................................................... */
#define DWARF_EXTENSIBLE_ENUM __attribute__((enum_extensibility(open)))
#define DWARF_ENUM(t,n) \
enum DWARF_EXTENSIBLE_ENUM n: t
#define DWARF_BYTECODE \
DWARF_EXTENSIBLE_ENUM : Dwarf_Byte
/* .. Data Representation ................................................... */
// Common sizes (these don't change between 32-bit and 64-bit)
typedef uint8_t Dwarf_Byte;
typedef uint16_t Dwarf_Half;
typedef uint32_t Dwarf_Word;
typedef uint64_t Dwarf_Xword;
typedef int8_t Dwarf_Sbyte;
typedef int32_t Dwarf_Sword;
typedef int64_t Dwarf_Sxword;
// 32-bit sizes
typedef uint32_t Dwarf32_Offset;
typedef uint32_t Dwarf32_Size;
typedef uint32_t Dwarf32_Length; // 0xfffffff0 and above are reserved
// 64-bit sizes
typedef uint64_t Dwarf64_Offset;
typedef uint64_t Dwarf64_Size;
typedef struct {
uint32_t magic; // 0xffffffff means we're using 64-bit
uint64_t length;
} Dwarf64_Length;
/* .. Unit Types ............................................................ */
// Table 7.2
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_UnitType) {
DW_UT_unknown = 0x00,
DW_UT_compile = 0x01,
DW_UT_type = 0x02,
DW_UT_partial = 0x03,
DW_UT_skeleton = 0x04,
DW_UT_split_compile = 0x05,
DW_UT_split_type = 0x06,
DW_UT_lo_user = 0x80,
DW_UT_hi_user = 0xff
} Dwarf_UnitType;
/* .. Tags .................................................................. */
// Table 7.3
typedef DWARF_ENUM(Dwarf_Xword, Dwarf_Tag) {
DW_TAG_array_type = 0x01,
DW_TAG_class_type = 0x02,
DW_TAG_entry_point = 0x03,
DW_TAG_enumeration_type = 0x04,
DW_TAG_formal_parmeter = 0x05,
// Reserved = 0x06,
// Reserved = 0x07,
DW_TAG_imported_declaration = 0x08,
// Reserved = 0x09,
DW_TAG_label = 0x0a,
DW_TAG_lexical_block = 0x0b,
// Reserved = 0x0c,
DW_TAG_member = 0x0d,
// Reserved = 0x0e,
DW_TAG_pointer_type = 0x0f,
DW_TAG_reference_type = 0x10,
DW_TAG_compile_unit = 0x11,
DW_TAG_string_type = 0x12,
DW_TAG_structure_type = 0x13,
// Reserved = 0x14,
DW_TAG_subroutine_type = 0x15,
DW_TAG_typedef = 0x16,
DW_TAG_union_type = 0x17,
DW_TAG_unspecified_parameters = 0x18,
DW_TAG_variant = 0x19,
DW_TAG_common_block = 0x1a,
DW_TAG_common_inclusion = 0x1b,
DW_TAG_inheritance = 0x1c,
DW_TAG_inlined_subroutine = 0x1d,
DW_TAG_module = 0x1e,
DW_TAG_ptr_to_member_type = 0x1f,
DW_TAG_set_type = 0x20,
DW_TAG_subrange_type = 0x21,
DW_TAG_with_stmt = 0x22,
DW_TAG_access_declaration = 0x23,
DW_TAG_base_type = 0x24,
DW_TAG_catch_block = 0x25,
DW_TAG_const_type = 0x26,
DW_TAG_constant = 0x27,
DW_TAG_enumerator = 0x28,
DW_TAG_file_type = 0x29,
DW_TAG_friend = 0x2a,
DW_TAG_namelist = 0x2b,
DW_TAG_namelist_item = 0x2c,
DW_TAG_packed_type = 0x2d,
DW_TAG_subprogram = 0x2e,
DW_TAG_template_type_parameter = 0x2f,
DW_TAG_template_value_parameter = 0x30,
DW_TAG_thrown_type = 0x31,
DW_TAG_try_block = 0x32,
DW_TAG_variant_part = 0x33,
DW_TAG_variable = 0x34,
DW_TAG_volatile_type = 0x35,
DW_TAG_dwarf_procedure = 0x36,
DW_TAG_restrict_type = 0x37,
DW_TAG_interface_type = 0x38,
DW_TAG_namespace = 0x39,
DW_TAG_imported_module = 0x3a,
DW_TAG_unspecified_type = 0x3b,
DW_TAG_partial_unit = 0x3c,
DW_TAG_imported_unit = 0x3d,
// Reserved = 0x3e,
DW_TAG_condition = 0x3f,
DW_TAG_shared_type = 0x40,
DW_TAG_type_unit = 0x41,
DW_TAG_rvalue_reference_type = 0x42,
DW_TAG_template_alias = 0x43,
DW_TAG_coarray_type = 0x44,
DW_TAG_generic_subrange = 0x45,
DW_TAG_dynamic_type = 0x46,
DW_TAG_atomic_type = 0x47,
DW_TAG_call_site = 0x48,
DW_TAG_call_site_parameter = 0x49,
DW_TAG_skeleton_unit = 0x4a,
DW_TAG_immutable_type = 0x4b,
DW_TAG_lo_user = 0x4080,
DW_TAG_hi_user = 0xffff,
} Dwarf_Tag;
/* .. Child Determination Encodings ......................................... */
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_ChildDetermination) {
DW_CHILDREN_no = 0x00,
DW_CHILDREN_yes = 0x01,
} Dwarf_ChildDetermination;
/* .. Attribute Encodings ................................................... */
// Table 7.5
typedef enum DWARF_EXTENSIBLE_ENUM Dwarf_Attribute {
DW_AT_sibling = 0x01, // reference
DW_AT_location = 0x02, // exprloc, loclist
DW_AT_name = 0x03, // string
// Reserved = 0x04, // not applicable
// Reserved = 0x05, // not applicable
// Reserved = 0x06, // not applicable
// Reserved = 0x07, // not applicable
// Reserved = 0x08, // not applicable
DW_AT_ordering = 0x09, // constant
// Reserved = 0x0a, // not applicable
DW_AT_byte_size = 0x0b, // constant, exprloc, reference
// Reserved = 0x0c2, // constant, exprloc, reference
DW_AT_bit_size = 0x0d, // constant, exprloc, reference
// Reserved = 0x0e, // not applicable
// Reserved = 0x0f, // not applicable
DW_AT_stmt_list = 0x10, // lineptr
DW_AT_low_pc = 0x11, // address
DW_AT_high_pc = 0x12, // address, constant
DW_AT_language = 0x13, // constant
// Reserved = 0x14, // not applicable
DW_AT_discr = 0x15, // reference
DW_AT_discr_value = 0x16, // constant
DW_AT_visibility = 0x17, // constant
DW_AT_import = 0x18, // reference
DW_AT_string_length = 0x19, // exprloc, loclist, reference
DW_AT_common_reference = 0x1a, // reference
DW_AT_comp_dir = 0x1b, // string
DW_AT_const_value = 0x1c, // block, constant, string
DW_AT_containing_type = 0x1d, // reference
DW_AT_default_value = 0x1e, // constant, reference, flag
// Reserved = 0x1f, // not applicable
DW_AT_inline = 0x20, // constant
DW_AT_is_optional = 0x21, // flag
DW_AT_lower_bound = 0x22, // constant, exprloc, reference
// Reserved = 0x23, // not applicable
// Reserved = 0x24, // not applicable
DW_AT_producer = 0x25, // string
// Reserved = 0x26, // not applicable
DW_AT_prototyped = 0x27, // flag
// Reserved = 0x28, // not applicable
// Reserved = 0x29, // not applicable
DW_AT_return_addr = 0x2a, // exprloc, loclist
// Reserved = 0x2b, // not applicable
DW_AT_start_scope = 0x2c, // constant, rnglist
// Reserved = 0x2d, // not applicable
DW_AT_bit_stride = 0x2e, // constant, exprloc, reference
DW_AT_upper_bound = 0x2f, // constant, exprloc, reference
// Reserved = 0x30, // not applicable
DW_AT_abstract_origin = 0x31, // reference
DW_AT_accessibility = 0x32, // constant
DW_AT_address_class = 0x33, // constant
DW_AT_artificial = 0x34, // flag
DW_AT_base_types = 0x35, // reference
DW_AT_calling_convention = 0x36, // constant
DW_AT_count = 0x37, // constant, exprloc, reference
DW_AT_data_member_location = 0x38, // constant, exprloc, loclist
DW_AT_decl_column = 0x39, // constant
DW_AT_decl_file = 0x3a, // constant
DW_AT_decl_line = 0x3b, // constant
DW_AT_declaration = 0x3c, // flag
DW_AT_discr_list = 0x3d, // block
DW_AT_encoding = 0x3e, // constant
DW_AT_external = 0x3f, // flag
DW_AT_frame_base = 0x40, // exprloc, loclist
DW_AT_friend = 0x41, // reference
DW_AT_identifier_case = 0x42, // constant
// Reserved = 0x43, // macptr
DW_AT_namelist_item = 0x44, // reference
DW_AT_priority = 0x45, // reference
DW_AT_segment = 0x46, // exprloc, loclist
DW_AT_specification = 0x47, // reference
DW_AT_static_link = 0x48, // exprloc, loclist
DW_AT_type = 0x49, // reference
DW_AT_use_location = 0x4a, // exprloc, loclist
DW_AT_variable_parameter = 0x4b, // flag
DW_AT_virtuality = 0x4c, // constant
DW_AT_vtable_elem_location = 0x4d, // exprloc, loclist
DW_AT_allocated = 0x4e, // constant, exprloc, reference
DW_AT_associated = 0x4f, // constant, exprloc, reference
DW_AT_data_location = 0x50, // exprloc
DW_AT_byte_stride = 0x51, // constant, exprloc, reference
DW_AT_entry_pc = 0x52, // address, constant
DW_AT_use_UTF8 = 0x53, // flag
DW_AT_extension = 0x54, // reference
DW_AT_ranges = 0x55, // rnglist
DW_AT_trampoline = 0x56, // address, flag, reference, string
DW_AT_call_column = 0x57, // constant
DW_AT_call_file = 0x58, // constant
DW_AT_call_line = 0x59, // constant
DW_AT_description = 0x5a, // string
DW_AT_binary_scale = 0x5b, // constant
DW_AT_decimal_scale = 0x5c, // constant
DW_AT_small = 0x5d, // reference
DW_AT_decimal_sign = 0x5e, // constant
DW_AT_digit_count = 0x5f, // constant
DW_AT_picture_string = 0x60, // string
DW_AT_mutable = 0x61, // flag
DW_AT_threads_scaled = 0x62, // flag
DW_AT_explicit = 0x63, // flag
DW_AT_object_pointer = 0x64, // reference
DW_AT_endianity = 0x65, // constant
DW_AT_elemental = 0x66, // flag
DW_AT_pure = 0x67, // flag
DW_AT_recursive = 0x68, // flag
DW_AT_signature = 0x69, // reference
DW_AT_main_subprogram = 0x6a, // flag
DW_AT_data_bit_offset = 0x6b, // constant
DW_AT_const_expr = 0x6c, // flag
DW_AT_enum_class = 0x6d, // flag
DW_AT_linkage_name = 0x6e, // string
DW_AT_string_length_bit_size = 0x6f, // constant
DW_AT_string_length_byte_size = 0x70, // constant
DW_AT_rank = 0x71, // constant, exprloc
DW_AT_str_offsets_base = 0x72, // stroffsetsptr
DW_AT_addr_base = 0x73, // addrptr
DW_AT_rnglists_base = 0x74, // rnglistsptr
// Reserved = 0x75, // Unused
DW_AT_dwo_name = 0x76, // string
DW_AT_reference = 0x77, // flag
DW_AT_rvalue_reference = 0x78, // flag
DW_AT_macros = 0x79, // macptr
DW_AT_call_all_calls = 0x7a, // flag
DW_AT_call_all_source_calls = 0x7b, // flag
DW_AT_call_all_tail_calls = 0x7c, // flag
DW_AT_call_return_pc = 0x7d, // address
DW_AT_call_value = 0x7e, // exprloc
DW_AT_call_origin = 0x7f, // exprloc
DW_AT_call_parameter = 0x80, // reference
DW_AT_call_pc = 0x81, // address
DW_AT_call_tail_call = 0x82, // flag
DW_AT_call_target = 0x83, // exprloc
DW_AT_call_target_clobbered = 0x84, // exprloc
DW_AT_call_data_location = 0x85, // exprloc
DW_AT_call_data_value = 0x86, // exprloc
DW_AT_noreturn = 0x87, // flag
DW_AT_alignment = 0x88, // constant
DW_AT_export_symbols = 0x89, // flag
DW_AT_deleted = 0x8a, // flag
DW_AT_defaulted = 0x8b, // constant
DW_AT_loclists_base = 0x8c, // loclistsptr
DW_AT_lo_user = 0x2000, // —
DW_AT_hi_user = 0x3fff, // —
} Dwarf_Attribute;
/* .. Form Encodings ........................................................ */
// Table 7.6
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_Form) {
DW_FORM_addr = 0x01,
// Reserved = 0x02,
DW_FORM_block2 = 0x03,
DW_FORM_block4 = 0x04,
DW_FORM_data2 = 0x05,
DW_FORM_data4 = 0x06,
DW_FORM_data8 = 0x07,
DW_FORM_string = 0x08,
DW_FORM_block = 0x09,
DW_FORM_block1 = 0x0a,
DW_FORM_data1 = 0x0b,
DW_FORM_flag = 0x0c,
DW_FORM_sdata = 0x0d,
DW_FORM_strp = 0x0e,
DW_FORM_udata = 0x0f,
DW_FORM_ref_addr = 0x10,
DW_FORM_ref1 = 0x11,
DW_FORM_ref2 = 0x12,
DW_FORM_ref4 = 0x13,
DW_FORM_ref8 = 0x14,
DW_FORM_ref_udata = 0x15,
DW_FORM_indirect = 0x16,
DW_FORM_sec_offset = 0x17,
DW_FORM_exprloc = 0x18,
DW_FORM_flag_present = 0x19,
DW_FORM_strx = 0x1a,
DW_FORM_addrx = 0x1b,
DW_FORM_ref_sup4 = 0x1c,
DW_FORM_strp_sup = 0x1d,
DW_FORM_data16 = 0x1e,
DW_FORM_line_strp = 0x1f,
DW_FORM_ref_sig8 = 0x20,
DW_FORM_implicit_const = 0x21,
DW_FORM_loclistx = 0x22,
DW_FORM_rnglistx = 0x23,
DW_FORM_ref_sup8 = 0x24,
DW_FORM_strx1 = 0x25,
DW_FORM_strx2 = 0x26,
DW_FORM_strx3 = 0x27,
DW_FORM_strx4 = 0x28,
DW_FORM_addrx1 = 0x29,
DW_FORM_addrx2 = 0x2a,
DW_FORM_addrx3 = 0x2b,
DW_FORM_addrx4 = 0x2c,
} Dwarf_Form;
/* .. DWARF Expressions ..................................................... */
// Table 7.9
enum DWARF_BYTECODE {
// Reserved = 0x01,
// Reserved = 0x02,
DW_OP_addr = 0x03,
// Reserved = 0x04,
// Reserved = 0x05,
DW_OP_deref = 0x06,
// Reserved = 0x07,
DW_OP_const1u = 0x08,
DW_OP_const1s = 0x09,
DW_OP_const2u = 0x0a,
DW_OP_const2s = 0x0b,
DW_OP_const4u = 0x0c,
DW_OP_const4s = 0x0d,
DW_OP_const8u = 0x0e,
DW_OP_const8s = 0x0f,
DW_OP_constu = 0x10,
DW_OP_consts = 0x11,
DW_OP_dup = 0x12,
DW_OP_drop = 0x13,
DW_OP_over = 0x14,
DW_OP_pick = 0x15,
DW_OP_swap = 0x16,
DW_OP_rot = 0x17,
DW_OP_xderef = 0x18,
DW_OP_abs = 0x19,
DW_OP_and = 0x1a,
DW_OP_div = 0x1b,
DW_OP_minus = 0x1c,
DW_OP_mod = 0x1d,
DW_OP_mul = 0x1e,
DW_OP_neg = 0x1f,
DW_OP_not = 0x20,
DW_OP_or = 0x21,
DW_OP_plus = 0x22,
DW_OP_plus_uconst = 0x23,
DW_OP_shl = 0x24,
DW_OP_shr = 0x25,
DW_OP_shra = 0x26,
DW_OP_xor = 0x27,
DW_OP_bra = 0x28,
DW_OP_eq = 0x29,
DW_OP_ge = 0x2a,
DW_OP_gt = 0x2b,
DW_OP_le = 0x2c,
DW_OP_lt = 0x2d,
DW_OP_ne = 0x2e,
DW_OP_skip = 0x2f,
DW_OP_lit0 = 0x30,
DW_OP_lit1 = 0x31,
DW_OP_lit2 = 0x32,
DW_OP_lit3 = 0x33,
DW_OP_lit4 = 0x34,
DW_OP_lit5 = 0x35,
DW_OP_lit6 = 0x36,
DW_OP_lit7 = 0x37,
DW_OP_lit8 = 0x38,
DW_OP_lit9 = 0x39,
DW_OP_lit10 = 0x3a,
DW_OP_lit11 = 0x3b,
DW_OP_lit12 = 0x3c,
DW_OP_lit13 = 0x3d,
DW_OP_lit14 = 0x3e,
DW_OP_lit15 = 0x3f,
DW_OP_lit16 = 0x40,
DW_OP_lit17 = 0x41,
DW_OP_lit18 = 0x42,
DW_OP_lit19 = 0x43,
DW_OP_lit20 = 0x44,
DW_OP_lit21 = 0x45,
DW_OP_lit22 = 0x46,
DW_OP_lit23 = 0x47,
DW_OP_lit24 = 0x48,
DW_OP_lit25 = 0x49,
DW_OP_lit26 = 0x4a,
DW_OP_lit27 = 0x4b,
DW_OP_lit28 = 0x4c,
DW_OP_lit29 = 0x4d,
DW_OP_lit30 = 0x4e,
DW_OP_lit31 = 0x4f,
DW_OP_reg0 = 0x50,
DW_OP_reg1 = 0x51,
DW_OP_reg2 = 0x52,
DW_OP_reg3 = 0x53,
DW_OP_reg4 = 0x54,
DW_OP_reg5 = 0x55,
DW_OP_reg6 = 0x56,
DW_OP_reg7 = 0x57,
DW_OP_reg8 = 0x58,
DW_OP_reg9 = 0x59,
DW_OP_reg10 = 0x5a,
DW_OP_reg11 = 0x5b,
DW_OP_reg12 = 0x5c,
DW_OP_reg13 = 0x5d,
DW_OP_reg14 = 0x5e,
DW_OP_reg15 = 0x5f,
DW_OP_reg16 = 0x60,
DW_OP_reg17 = 0x61,
DW_OP_reg18 = 0x62,
DW_OP_reg19 = 0x63,
DW_OP_reg20 = 0x64,
DW_OP_reg21 = 0x65,
DW_OP_reg22 = 0x66,
DW_OP_reg23 = 0x67,
DW_OP_reg24 = 0x68,
DW_OP_reg25 = 0x69,
DW_OP_reg26 = 0x6a,
DW_OP_reg27 = 0x6b,
DW_OP_reg28 = 0x6c,
DW_OP_reg29 = 0x6d,
DW_OP_reg30 = 0x6e,
DW_OP_reg31 = 0x6f,
DW_OP_breg0 = 0x70,
DW_OP_breg1 = 0x71,
DW_OP_breg2 = 0x72,
DW_OP_breg3 = 0x73,
DW_OP_breg4 = 0x74,
DW_OP_breg5 = 0x75,
DW_OP_breg6 = 0x76,
DW_OP_breg7 = 0x77,
DW_OP_breg8 = 0x78,
DW_OP_breg9 = 0x79,
DW_OP_breg10 = 0x7a,
DW_OP_breg11 = 0x7b,
DW_OP_breg12 = 0x7c,
DW_OP_breg13 = 0x7d,
DW_OP_breg14 = 0x7e,
DW_OP_breg15 = 0x7f,
DW_OP_breg16 = 0x80,
DW_OP_breg17 = 0x81,
DW_OP_breg18 = 0x82,
DW_OP_breg19 = 0x83,
DW_OP_breg20 = 0x84,
DW_OP_breg21 = 0x85,
DW_OP_breg22 = 0x86,
DW_OP_breg23 = 0x87,
DW_OP_breg24 = 0x88,
DW_OP_breg25 = 0x89,
DW_OP_breg26 = 0x8a,
DW_OP_breg27 = 0x8b,
DW_OP_breg28 = 0x8c,
DW_OP_breg29 = 0x8d,
DW_OP_breg30 = 0x8e,
DW_OP_breg31 = 0x8f,
DW_OP_regx = 0x90,
DW_OP_fbreg = 0x91,
DW_OP_bregx = 0x92,
DW_OP_piece = 0x93,
DW_OP_deref_size = 0x94,
DW_OP_xderef_size = 0x95,
DW_OP_nop = 0x96,
DW_OP_push_object_address = 0x97,
DW_OP_call2 = 0x98,
DW_OP_call4 = 0x99,
DW_OP_call_ref = 0x9a,
DW_OP_form_tls_address = 0x9b,
DW_OP_call_frame_cfa = 0x9c,
DW_OP_bit_piece = 0x9d,
DW_OP_implicit_value = 0x9e,
DW_OP_stack_value = 0x9f,
DW_OP_implicit_pointer = 0xa0,
DW_OP_addrx = 0xa1,
DW_OP_constx = 0xa2,
DW_OP_entry_value = 0xa3,
DW_OP_const_type = 0xa4,
DW_OP_regval_type = 0xa5,
DW_OP_deref_type = 0xa6,
DW_OP_xderef_type = 0xa7,
DW_OP_convert = 0xa8,
DW_OP_reinterpret = 0xa9,
DW_OP_lo_user = 0xe0,
DW_OP_hi_user = 0xff,
};
/* .. Line Number Information ............................................... */
// Table 7.25
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_LNS_Opcode) {
DW_LNS_extended = 0x00,
DW_LNS_copy = 0x01,
DW_LNS_advance_pc = 0x02,
DW_LNS_advance_line = 0x03,
DW_LNS_set_file = 0x04,
DW_LNS_set_column = 0x05,
DW_LNS_negate_stmt = 0x06,
DW_LNS_set_basic_block = 0x07,
DW_LNS_const_add_pc = 0x08,
DW_LNS_fixed_advance_pc = 0x09,
DW_LNS_set_prologue_end = 0x0a,
DW_LNS_set_epilogue_begin = 0x0b,
DW_LNS_set_isa = 0x0c,
} Dwarf_LNS_Opcode;
// Table 7.26
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_LNE_Opcode) {
DW_LNE_end_sequence = 0x01,
DW_LNE_set_address = 0x02,
DW_LNE_define_file = 0x03,
DW_LNE_set_discriminator = 0x04,
DW_LNE_lo_user = 0x80,
DW_LNE_hi_user = 0xff,
} Dwarf_LNE_Opcode;
// Table 7.27
typedef DWARF_ENUM(Dwarf_Half, Dwarf_Lhdr_Format) {
DW_LNCT_path = 0x0001,
DW_LNCT_directory_index = 0x0002,
DW_LNCT_timestamp = 0x0003,
DW_LNCT_size = 0x0004,
DW_LNCT_MD5 = 0x0005,
DW_LNCT_lo_user = 0x2000,
DW_LNCT_hi_user = 0x3fff,
} Dwarf_Lhdr_Format;
// 6.2.4 The Line Number Program Header
typedef struct {
Dwarf32_Length length;
Dwarf_Half version;
Dwarf_Byte address_size;
Dwarf_Byte segment_selector_size;
Dwarf32_Size header_length;
Dwarf_Byte minimum_instruction_length;
Dwarf_Byte maximum_operations_per_instruction;
Dwarf_Byte default_is_stmt;
Dwarf_Sbyte line_base;
Dwarf_Byte line_range;
Dwarf_Byte opcode_base;
// Variable length fields:
// Dwarf_Byte standard_opcode_lengths[];
// Dwarf_Byte directory_entry_format_count;
// Dwarf_ULEB128 directory_entry_format[];
// Dwarf_ULEB128 directories_count;
// encoded directories[];
// Dwarf_Byte file_name_entry_format_count;
// Dwarf_ULEB128 file_name_entry_format;
// Dwarf_ULEB128 file_names_count;
// encoded file_names[];
} DWARF32_Lhdr;
typedef struct {
Dwarf64_Length length;
Dwarf_Half version;
Dwarf_Byte address_size;
Dwarf_Byte segment_selector_size;
Dwarf64_Size header_length;
Dwarf_Byte minimum_instruction_length;
Dwarf_Byte maximum_operations_per_instruction;
Dwarf_Byte default_is_stmt;
Dwarf_Sbyte line_base;
Dwarf_Byte line_range;
Dwarf_Byte opcode_base;
// Variable length fields:
// Dwarf_Byte standard_opcode_lengths[];
// Dwarf_Byte directory_entry_format_count;
// Dwarf_ULEB128 directory_entry_format[];
// Dwarf_ULEB128 directories_count;
// encoded directories[];
// Dwarf_Byte file_name_entry_format_count;
// Dwarf_ULEB128 file_name_entry_format;
// Dwarf_ULEB128 file_names_count;
// encoded file_names[];
} DWARF64_Lhdr;
/* .. Call frame instruction encodings ...................................... */
// Table 7.29
enum DWARF_BYTECODE {
DW_CFA_advance_loc = 0x40,
DW_CFA_offset = 0x80,
DW_CFA_restore = 0xc0,
DW_CFA_nop = 0x00,
DW_CFA_set_loc = 0x01,
DW_CFA_advance_loc1 = 0x02,
DW_CFA_advance_loc2 = 0x03,
DW_CFA_advance_loc4 = 0x04,
DW_CFA_offset_extended = 0x05,
DW_CFA_restore_extended = 0x06,
DW_CFA_undefined = 0x07,
DW_CFA_same_value = 0x08,
DW_CFA_register = 0x09,
DW_CFA_remember_state = 0x0a,
DW_CFA_restore_state = 0x0b,
DW_CFA_def_cfa = 0x0c,
DW_CFA_def_cfa_register = 0x0d,
DW_CFA_def_cfa_offset = 0x0e,
DW_CFA_def_cfa_expression = 0x0f,
DW_CFA_expression = 0x10,
DW_CFA_offset_extended_sf = 0x11,
DW_CFA_def_cfa_sf = 0x12,
DW_CFA_def_cfa_offset_sf = 0x13,
DW_CFA_val_offset = 0x14,
DW_CFA_val_offset_sf = 0x15,
DW_CFA_val_expression = 0x16,
DW_CFA_lo_user = 0x1c,
DW_CFA_hi_user = 0x3f
};
/* .. Range list encodings .................................................. */
// Table 7.30
typedef DWARF_ENUM(Dwarf_Byte, Dwarf_RLE_Entry) {
DW_RLE_end_of_list = 0x00,
DW_RLE_base_addressx = 0x01,
DW_RLE_startx_endx = 0x02,
DW_RLE_startx_length = 0x03,
DW_RLE_offset_pair = 0x04,
DW_RLE_base_address = 0x05,
DW_RLE_start_end = 0x06,
DW_RLE_start_length = 0x07
} Dwarf_RLE_Entry;
/* .. Common Information Entry .............................................. */
// Table 4.5: Common Information Entry (CIE)
typedef struct {
Dwarf32_Length length;
Dwarf32_Offset CIE_id;
Dwarf_Byte version;
// Followed by variable length fields as follows:
//
// Dwarf_Byte augmentation[]; // NUL terminated string
// Dwarf_Byte address_size;
// Dwarf_Byte segment_selector_size;
// Dwarf_ULEB128 code_alignment_factor;
// Dwarf_SLEB128 data_alignment_factor;
// Dwarf_ULEB128 return_address_register;
// Dwarf_Byte initial_instructions[];
// Dwarf_Byte padding[]
} Dwarf32_CIEHdr;
typedef struct {
Dwarf64_Length length;
Dwarf64_Offset CIE_id;
Dwarf_Byte version;
// Followed by variable length fields as follows:
//
// Dwarf_Byte augmentation[]; // NUL terminated string
// Dwarf_Byte address_size;
// Dwarf_Byte segment_selector_size;
// Dwarf_ULEB128 code_alignment_factor;
// Dwarf_SLEB128 data_alignment_factor;
// Dwarf_ULEB128 return_address_register;
// Dwarf_Byte initial_instructions[];
// Dwarf_Byte padding[]
} Dwarf64_CIEHdr;
/* .. Frame Descriptor Entry ................................................ */
// Table 4.7: Frame Descriptor Entry (FDE)
typedef struct {
Dwarf32_Length length;
Dwarf32_Offset CIE_pointer; // Offset into the section that points at CIE
// Followed by variable fields as follows:
//
// Dwarf_FarAddr initial_location; // May include segment selector and address
// Dwarf_Addr address_range; // Number of bytes of instructions
// Dwarf_Byte instructions[];
// Dwarf_Byte padding[];
} Dwarf32_FDEHdr;
#pragma pack(pop)
#ifdef __cplusplus
} // namespace runtime
} // namespace swift
#endif
#endif // SWIFT_DWARF_H
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