glibc/sysdeps/generic/dwarf2.h

/* Declarations and definitions of codes relating to the DWARF2 symbolic
   debugging information format.
   Copyright (C) 1992-2024 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _DWARF2_H
#define _DWARF2_H	1

/* This file is derived from the DWARF specification (a public document)
   Revision 2.0.0 (July 27, 1993) developed by the UNIX International
   Programming Languages Special Interest Group (UI/PLSIG) and distributed
   by UNIX International.  Copies of this specification are available from
   UNIX International, 20 Waterview Boulevard, Parsippany, NJ, 07054.  */

/* This file is shared between GCC and GDB, and should not contain
   prototypes.  */

#ifndef __ASSEMBLER__
/* Tag names and codes.  */

enum dwarf_tag
  {
    DW_TAG_padding = 0x00,
    DW_TAG_array_type = 0x01,
    DW_TAG_class_type = 0x02,
    DW_TAG_entry_point = 0x03,
    DW_TAG_enumeration_type = 0x04,
    DW_TAG_formal_parameter = 0x05,
    DW_TAG_imported_declaration = 0x08,
    DW_TAG_label = 0x0a,
    DW_TAG_lexical_block = 0x0b,
    DW_TAG_member = 0x0d,
    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,
    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_param = 0x2f,
    DW_TAG_template_value_param = 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,
    /* SGI/MIPS Extensions */
    DW_TAG_MIPS_loop = 0x4081,
    /* GNU extensions */
    DW_TAG_format_label = 0x4101,	/* for FORTRAN 77 and Fortran 90 */
    DW_TAG_function_template = 0x4102,	/* for C++ */
    DW_TAG_class_template = 0x4103,	/* for C++ */
    DW_TAG_GNU_BINCL = 0x4104,
    DW_TAG_GNU_EINCL = 0x4105
  };

#define DW_TAG_lo_user	0x4080
#define DW_TAG_hi_user	0xffff

/* flag that tells whether entry has a child or not */
#define DW_children_no   0
#define	DW_children_yes  1

/* Form names and codes.  */
enum dwarf_form
  {
    DW_FORM_addr = 0x01,
    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
  };

/* Attribute names and codes.  */

enum dwarf_attribute
  {
    DW_AT_sibling = 0x01,
    DW_AT_location = 0x02,
    DW_AT_name = 0x03,
    DW_AT_ordering = 0x09,
    DW_AT_subscr_data = 0x0a,
    DW_AT_byte_size = 0x0b,
    DW_AT_bit_offset = 0x0c,
    DW_AT_bit_size = 0x0d,
    DW_AT_element_list = 0x0f,
    DW_AT_stmt_list = 0x10,
    DW_AT_low_pc = 0x11,
    DW_AT_high_pc = 0x12,
    DW_AT_language = 0x13,
    DW_AT_member = 0x14,
    DW_AT_discr = 0x15,
    DW_AT_discr_value = 0x16,
    DW_AT_visibility = 0x17,
    DW_AT_import = 0x18,
    DW_AT_string_length = 0x19,
    DW_AT_common_reference = 0x1a,
    DW_AT_comp_dir = 0x1b,
    DW_AT_const_value = 0x1c,
    DW_AT_containing_type = 0x1d,
    DW_AT_default_value = 0x1e,
    DW_AT_inline = 0x20,
    DW_AT_is_optional = 0x21,
    DW_AT_lower_bound = 0x22,
    DW_AT_producer = 0x25,
    DW_AT_prototyped = 0x27,
    DW_AT_return_addr = 0x2a,
    DW_AT_start_scope = 0x2c,
    DW_AT_stride_size = 0x2e,
    DW_AT_upper_bound = 0x2f,
    DW_AT_abstract_origin = 0x31,
    DW_AT_accessibility = 0x32,
    DW_AT_address_class = 0x33,
    DW_AT_artificial = 0x34,
    DW_AT_base_types = 0x35,
    DW_AT_calling_convention = 0x36,
    DW_AT_count = 0x37,
    DW_AT_data_member_location = 0x38,
    DW_AT_decl_column = 0x39,
    DW_AT_decl_file = 0x3a,
    DW_AT_decl_line = 0x3b,
    DW_AT_declaration = 0x3c,
    DW_AT_discr_list = 0x3d,
    DW_AT_encoding = 0x3e,
    DW_AT_external = 0x3f,
    DW_AT_frame_base = 0x40,
    DW_AT_friend = 0x41,
    DW_AT_identifier_case = 0x42,
    DW_AT_macro_info = 0x43,
    DW_AT_namelist_items = 0x44,
    DW_AT_priority = 0x45,
    DW_AT_segment = 0x46,
    DW_AT_specification = 0x47,
    DW_AT_static_link = 0x48,
    DW_AT_type = 0x49,
    DW_AT_use_location = 0x4a,
    DW_AT_variable_parameter = 0x4b,
    DW_AT_virtuality = 0x4c,
    DW_AT_vtable_elem_location = 0x4d,
    /* SGI/MIPS Extensions */
    DW_AT_MIPS_fde = 0x2001,
    DW_AT_MIPS_loop_begin = 0x2002,
    DW_AT_MIPS_tail_loop_begin = 0x2003,
    DW_AT_MIPS_epilog_begin = 0x2004,
    DW_AT_MIPS_loop_unroll_factor = 0x2005,
    DW_AT_MIPS_software_pipeline_depth = 0x2006,
    DW_AT_MIPS_linkage_name = 0x2007,
    DW_AT_MIPS_stride = 0x2008,
    DW_AT_MIPS_abstract_name = 0x2009,
    DW_AT_MIPS_clone_origin = 0x200a,
    DW_AT_MIPS_has_inlines = 0x200b,
    /* GNU extensions.  */
    DW_AT_sf_names = 0x2101,
    DW_AT_src_info = 0x2102,
    DW_AT_mac_info = 0x2103,
    DW_AT_src_coords = 0x2104,
    DW_AT_body_begin = 0x2105,
    DW_AT_body_end = 0x2106
  };

#define DW_AT_lo_user	0x2000	/* implementation-defined range start */
#define DW_AT_hi_user	0x3ff0	/* implementation-defined range end */

/* Location atom names and codes.  */

enum dwarf_location_atom
  {
    DW_OP_addr = 0x03,
    DW_OP_deref = 0x06,
    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
  };

#define DW_OP_lo_user	0x80	/* implementation-defined range start */
#define DW_OP_hi_user	0xff	/* implementation-defined range end */

/* Type encodings.  */

enum dwarf_type
  {
    DW_ATE_void = 0x0,
    DW_ATE_address = 0x1,
    DW_ATE_boolean = 0x2,
    DW_ATE_complex_float = 0x3,
    DW_ATE_float = 0x4,
    DW_ATE_signed = 0x5,
    DW_ATE_signed_char = 0x6,
    DW_ATE_unsigned = 0x7,
    DW_ATE_unsigned_char = 0x8
  };

#define	DW_ATE_lo_user 0x80
#define	DW_ATE_hi_user 0xff

/* Array ordering names and codes.  */
enum dwarf_array_dim_ordering
  {
    DW_ORD_row_major = 0,
    DW_ORD_col_major = 1
  };

/* access attribute */
enum dwarf_access_attribute
  {
    DW_ACCESS_public = 1,
    DW_ACCESS_protected = 2,
    DW_ACCESS_private = 3
  };

/* visibility */
enum dwarf_visibility_attribute
  {
    DW_VIS_local = 1,
    DW_VIS_exported = 2,
    DW_VIS_qualified = 3
  };

/* virtuality */
enum dwarf_virtuality_attribute
  {
    DW_VIRTUALITY_none = 0,
    DW_VIRTUALITY_virtual = 1,
    DW_VIRTUALITY_pure_virtual = 2
  };

/* case sensitivity */
enum dwarf_id_case
  {
    DW_ID_case_sensitive = 0,
    DW_ID_up_case = 1,
    DW_ID_down_case = 2,
    DW_ID_case_insensitive = 3
  };

/* calling convention */
enum dwarf_calling_convention
  {
    DW_CC_normal = 0x1,
    DW_CC_program = 0x2,
    DW_CC_nocall = 0x3
  };

#define DW_CC_lo_user 0x40
#define DW_CC_hi_user 0xff

/* inline attribute */
enum dwarf_inline_attribute
  {
    DW_INL_not_inlined = 0,
    DW_INL_inlined = 1,
    DW_INL_declared_not_inlined = 2,
    DW_INL_declared_inlined = 3
  };

/* discriminant lists */
enum dwarf_discrim_list
  {
    DW_DSC_label = 0,
    DW_DSC_range = 1
  };

/* line number opcodes */
enum dwarf_line_number_ops
  {
    DW_LNS_extended_op = 0,
    DW_LNS_copy = 1,
    DW_LNS_advance_pc = 2,
    DW_LNS_advance_line = 3,
    DW_LNS_set_file = 4,
    DW_LNS_set_column = 5,
    DW_LNS_negate_stmt = 6,
    DW_LNS_set_basic_block = 7,
    DW_LNS_const_add_pc = 8,
    DW_LNS_fixed_advance_pc = 9
  };

/* line number extended opcodes */
enum dwarf_line_number_x_ops
  {
    DW_LNE_end_sequence = 1,
    DW_LNE_set_address = 2,
    DW_LNE_define_file = 3
  };

/* call frame information */
enum dwarf_call_frame_info
  {
    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,
    /* Dwarf 2.1 */
    DW_CFA_offset_extended_sf = 0x11,
    DW_CFA_def_cfa_sf = 0x12,
    DW_CFA_def_cfa_offset_sf = 0x13,

    /* SGI/MIPS specific */
    DW_CFA_MIPS_advance_loc8 = 0x1d,

    /* GNU extensions */
    DW_CFA_GNU_window_save = 0x2d,
    DW_CFA_GNU_args_size = 0x2e,
    DW_CFA_GNU_negative_offset_extended = 0x2f
  };

#define DW_CIE_ID	  0xffffffff
#define DW_CIE_VERSION	  1

#define DW_CFA_extended   0
#define DW_CFA_low_user   0x1c
#define DW_CFA_high_user  0x3f

#define DW_CHILDREN_no		     0x00
#define DW_CHILDREN_yes		     0x01

#define DW_ADDR_none		0

/* Source language names and codes.  */

enum dwarf_source_language
  {
    DW_LANG_C89 = 0x0001,
    DW_LANG_C = 0x0002,
    DW_LANG_Ada83 = 0x0003,
    DW_LANG_C_plus_plus = 0x0004,
    DW_LANG_Cobol74 = 0x0005,
    DW_LANG_Cobol85 = 0x0006,
    DW_LANG_Fortran77 = 0x0007,
    DW_LANG_Fortran90 = 0x0008,
    DW_LANG_Pascal83 = 0x0009,
    DW_LANG_Modula2 = 0x000a,
    DW_LANG_Java = 0x000b,
    DW_LANG_Mips_Assembler = 0x8001
  };


#define DW_LANG_lo_user 0x8000	/* implementation-defined range start */
#define DW_LANG_hi_user 0xffff	/* implementation-defined range start */

/* Names and codes for macro information.  */

enum dwarf_macinfo_record_type
  {
    DW_MACINFO_define = 1,
    DW_MACINFO_undef = 2,
    DW_MACINFO_start_file = 3,
    DW_MACINFO_end_file = 4,
    DW_MACINFO_vendor_ext = 255
  };

#endif /* !ASSEMBLER */

/* @@@ For use with GNU frame unwind information.  */

#define DW_EH_PE_absptr		0x00
#define DW_EH_PE_omit		0xff

#define DW_EH_PE_uleb128	0x01
#define DW_EH_PE_udata2		0x02
#define DW_EH_PE_udata4		0x03
#define DW_EH_PE_udata8		0x04
#define DW_EH_PE_sleb128	0x09
#define DW_EH_PE_sdata2		0x0A
#define DW_EH_PE_sdata4		0x0B
#define DW_EH_PE_sdata8		0x0C
#define DW_EH_PE_signed		0x08

#define DW_EH_PE_pcrel		0x10
#define DW_EH_PE_textrel	0x20
#define DW_EH_PE_datarel	0x30
#define DW_EH_PE_funcrel	0x40
#define DW_EH_PE_aligned	0x50

#define DW_EH_PE_indirect	0x80

#endif /* dwarf2.h */