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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ld
// TODO/NICETOHAVE:
// - eliminate DW_CLS_ if not used
// - package info in compilation units
// - assign global variables and types to their packages
// - gdb uses c syntax, meaning clumsy quoting is needed for go identifiers. eg
// ptype struct '[]uint8' and qualifiers need to be quoted away
// - lexical scoping is lost, so gdb gets confused as to which 'obj.i' you mean.
// - file:line info for variables
// - make strings a typedef so prettyprinters can see the underlying string type
//
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
* Emit debug_abbrevs, debug_info and debug_line sections to current
* offset in cout.
*/
/*
* Add the dwarf section names to the ELF
* s[ection]h[eader]str[ing]tab. Prerequisite for
* dwarfaddelfheaders().
*/
/*
* Add section headers pointing to the sections emitted in
* dwarfemitdebugsections.
*/
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Cut, pasted, tr-and-awk'ed from tables in
// http://dwarfstd.org/doc/Dwarf3.pdf
// Table 18
const (
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_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
// Dwarf3
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
DW_TAG_condition = 0x3f
DW_TAG_shared_type = 0x40
// Dwarf4
DW_TAG_type_unit = 0x41
DW_TAG_rvalue_reference_type = 0x42
DW_TAG_template_alias = 0x43
// User defined
DW_TAG_lo_user = 0x4080
DW_TAG_hi_user = 0xffff
)
// Table 19
const (
DW_CHILDREN_no = 0x00
DW_CHILDREN_yes = 0x01
)
// Not from the spec, but logicaly belongs here
const (
DW_CLS_ADDRESS = 0x01 + iota
DW_CLS_BLOCK
DW_CLS_CONSTANT
DW_CLS_FLAG
DW_CLS_PTR // lineptr, loclistptr, macptr, rangelistptr
DW_CLS_REFERENCE
DW_CLS_ADDRLOC
DW_CLS_STRING
)
// Table 20
const (
DW_AT_sibling = 0x01 // reference
DW_AT_location = 0x02 // block, loclistptr
DW_AT_name = 0x03 // string
DW_AT_ordering = 0x09 // constant
DW_AT_byte_size = 0x0b // block, constant, reference
DW_AT_bit_offset = 0x0c // block, constant, reference
DW_AT_bit_size = 0x0d // block, constant, reference
DW_AT_stmt_list = 0x10 // lineptr
DW_AT_low_pc = 0x11 // address
DW_AT_high_pc = 0x12 // address
DW_AT_language = 0x13 // constant
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 // block, loclistptr
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 // reference
DW_AT_inline = 0x20 // constant
DW_AT_is_optional = 0x21 // flag
DW_AT_lower_bound = 0x22 // block, constant, reference
DW_AT_producer = 0x25 // string
DW_AT_prototyped = 0x27 // flag
DW_AT_return_addr = 0x2a // block, loclistptr
DW_AT_start_scope = 0x2c // constant
DW_AT_bit_stride = 0x2e // constant
DW_AT_upper_bound = 0x2f // block, constant, reference
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 // block, constant, reference
DW_AT_data_member_location = 0x38 // block, constant, loclistptr
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 // block, loclistptr
DW_AT_friend = 0x41 // reference
DW_AT_identifier_case = 0x42 // constant
DW_AT_macro_info = 0x43 // macptr
DW_AT_namelist_item = 0x44 // block
DW_AT_priority = 0x45 // reference
DW_AT_segment = 0x46 // block, loclistptr
DW_AT_specification = 0x47 // reference
DW_AT_static_link = 0x48 // block, loclistptr
DW_AT_type = 0x49 // reference
DW_AT_use_location = 0x4a // block, loclistptr
DW_AT_variable_parameter = 0x4b // flag
DW_AT_virtuality = 0x4c // constant
DW_AT_vtable_elem_location = 0x4d // block, loclistptr
// Dwarf3
DW_AT_allocated = 0x4e // block, constant, reference
DW_AT_associated = 0x4f // block, constant, reference
DW_AT_data_location = 0x50 // block
DW_AT_byte_stride = 0x51 // block, constant, reference
DW_AT_entry_pc = 0x52 // address
DW_AT_use_UTF8 = 0x53 // flag
DW_AT_extension = 0x54 // reference
DW_AT_ranges = 0x55 // rangelistptr
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_lo_user = 0x2000 // ---
DW_AT_hi_user = 0x3fff // ---
)
// Table 21
const (
DW_FORM_addr = 0x01 // address
DW_FORM_block2 = 0x03 // block
DW_FORM_block4 = 0x04 // block
DW_FORM_data2 = 0x05 // constant
DW_FORM_data4 = 0x06 // constant, lineptr, loclistptr, macptr, rangelistptr
DW_FORM_data8 = 0x07 // constant, lineptr, loclistptr, macptr, rangelistptr
DW_FORM_string = 0x08 // string
DW_FORM_block = 0x09 // block
DW_FORM_block1 = 0x0a // block
DW_FORM_data1 = 0x0b // constant
DW_FORM_flag = 0x0c // flag
DW_FORM_sdata = 0x0d // constant
DW_FORM_strp = 0x0e // string
DW_FORM_udata = 0x0f // constant
DW_FORM_ref_addr = 0x10 // reference
DW_FORM_ref1 = 0x11 // reference
DW_FORM_ref2 = 0x12 // reference
DW_FORM_ref4 = 0x13 // reference
DW_FORM_ref8 = 0x14 // reference
DW_FORM_ref_udata = 0x15 // reference
DW_FORM_indirect = 0x16 // (see Section 7.5.3)
)
// Table 24 (#operands, notes)
const (
DW_OP_addr = 0x03 // 1 constant address (size target specific)
DW_OP_deref = 0x06 // 0
DW_OP_const1u = 0x08 // 1 1-byte constant
DW_OP_const1s = 0x09 // 1 1-byte constant
DW_OP_const2u = 0x0a // 1 2-byte constant
DW_OP_const2s = 0x0b // 1 2-byte constant
DW_OP_const4u = 0x0c // 1 4-byte constant
DW_OP_const4s = 0x0d // 1 4-byte constant
DW_OP_const8u = 0x0e // 1 8-byte constant
DW_OP_const8s = 0x0f // 1 8-byte constant
DW_OP_constu = 0x10 // 1 ULEB128 constant
DW_OP_consts = 0x11 // 1 SLEB128 constant
DW_OP_dup = 0x12 // 0
DW_OP_drop = 0x13 // 0
DW_OP_over = 0x14 // 0
DW_OP_pick = 0x15 // 1 1-byte stack index
DW_OP_swap = 0x16 // 0
DW_OP_rot = 0x17 // 0
DW_OP_xderef = 0x18 // 0
DW_OP_abs = 0x19 // 0
DW_OP_and = 0x1a // 0
DW_OP_div = 0x1b // 0
DW_OP_minus = 0x1c // 0
DW_OP_mod = 0x1d // 0
DW_OP_mul = 0x1e // 0
DW_OP_neg = 0x1f // 0
DW_OP_not = 0x20 // 0
DW_OP_or = 0x21 // 0
DW_OP_plus = 0x22 // 0
DW_OP_plus_uconst = 0x23 // 1 ULEB128 addend
DW_OP_shl = 0x24 // 0
DW_OP_shr = 0x25 // 0
DW_OP_shra = 0x26 // 0
DW_OP_xor = 0x27 // 0
DW_OP_skip = 0x2f // 1 signed 2-byte constant
DW_OP_bra = 0x28 // 1 signed 2-byte constant
DW_OP_eq = 0x29 // 0
DW_OP_ge = 0x2a // 0
DW_OP_gt = 0x2b // 0
DW_OP_le = 0x2c // 0
DW_OP_lt = 0x2d // 0
DW_OP_ne = 0x2e // 0
DW_OP_lit0 = 0x30 // 0 ...
DW_OP_lit31 = 0x4f // 0 literals 0..31 = (DW_OP_lit0 + literal)
DW_OP_reg0 = 0x50 // 0 ..
DW_OP_reg31 = 0x6f // 0 reg 0..31 = (DW_OP_reg0 + regnum)
DW_OP_breg0 = 0x70 // 1 ...
DW_OP_breg31 = 0x8f // 1 SLEB128 offset base register 0..31 = (DW_OP_breg0 + regnum)
DW_OP_regx = 0x90 // 1 ULEB128 register
DW_OP_fbreg = 0x91 // 1 SLEB128 offset
DW_OP_bregx = 0x92 // 2 ULEB128 register followed by SLEB128 offset
DW_OP_piece = 0x93 // 1 ULEB128 size of piece addressed
DW_OP_deref_size = 0x94 // 1 1-byte size of data retrieved
DW_OP_xderef_size = 0x95 // 1 1-byte size of data retrieved
DW_OP_nop = 0x96 // 0
DW_OP_push_object_address = 0x97 // 0
DW_OP_call2 = 0x98 // 1 2-byte offset of DIE
DW_OP_call4 = 0x99 // 1 4-byte offset of DIE
DW_OP_call_ref = 0x9a // 1 4- or 8-byte offset of DIE
DW_OP_form_tls_address = 0x9b // 0
DW_OP_call_frame_cfa = 0x9c // 0
DW_OP_bit_piece = 0x9d // 2
DW_OP_lo_user = 0xe0
DW_OP_hi_user = 0xff
)
// Table 25
const (
DW_ATE_address = 0x01
DW_ATE_boolean = 0x02
DW_ATE_complex_float = 0x03
DW_ATE_float = 0x04
DW_ATE_signed = 0x05
DW_ATE_signed_char = 0x06
DW_ATE_unsigned = 0x07
DW_ATE_unsigned_char = 0x08
DW_ATE_imaginary_float = 0x09
DW_ATE_packed_decimal = 0x0a
DW_ATE_numeric_string = 0x0b
DW_ATE_edited = 0x0c
DW_ATE_signed_fixed = 0x0d
DW_ATE_unsigned_fixed = 0x0e
DW_ATE_decimal_float = 0x0f
DW_ATE_lo_user = 0x80
DW_ATE_hi_user = 0xff
)
// Table 26
const (
DW_DS_unsigned = 0x01
DW_DS_leading_overpunch = 0x02
DW_DS_trailing_overpunch = 0x03
DW_DS_leading_separate = 0x04
DW_DS_trailing_separate = 0x05
)
// Table 27
const (
DW_END_default = 0x00
DW_END_big = 0x01
DW_END_little = 0x02
DW_END_lo_user = 0x40
DW_END_hi_user = 0xff
)
// Table 28
const (
DW_ACCESS_public = 0x01
DW_ACCESS_protected = 0x02
DW_ACCESS_private = 0x03
)
// Table 29
const (
DW_VIS_local = 0x01
DW_VIS_exported = 0x02
DW_VIS_qualified = 0x03
)
// Table 30
const (
DW_VIRTUALITY_none = 0x00
DW_VIRTUALITY_virtual = 0x01
DW_VIRTUALITY_pure_virtual = 0x02
)
// Table 31
const (
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
// Dwarf3
DW_LANG_Java = 0x000b
DW_LANG_C99 = 0x000c
DW_LANG_Ada95 = 0x000d
DW_LANG_Fortran95 = 0x000e
DW_LANG_PLI = 0x000f
DW_LANG_ObjC = 0x0010
DW_LANG_ObjC_plus_plus = 0x0011
DW_LANG_UPC = 0x0012
DW_LANG_D = 0x0013
// Dwarf4
DW_LANG_Python = 0x0014
// Dwarf5
DW_LANG_Go = 0x0016
DW_LANG_lo_user = 0x8000
DW_LANG_hi_user = 0xffff
)
// Table 32
const (
DW_ID_case_sensitive = 0x00
DW_ID_up_case = 0x01
DW_ID_down_case = 0x02
DW_ID_case_insensitive = 0x03
)
// Table 33
const (
DW_CC_normal = 0x01
DW_CC_program = 0x02
DW_CC_nocall = 0x03
DW_CC_lo_user = 0x40
DW_CC_hi_user = 0xff
)
// Table 34
const (
DW_INL_not_inlined = 0x00
DW_INL_inlined = 0x01
DW_INL_declared_not_inlined = 0x02
DW_INL_declared_inlined = 0x03
)
// Table 35
const (
DW_ORD_row_major = 0x00
DW_ORD_col_major = 0x01
)
// Table 36
const (
DW_DSC_label = 0x00
DW_DSC_range = 0x01
)
// Table 37
const (
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
// Dwarf3
DW_LNS_set_prologue_end = 0x0a
DW_LNS_set_epilogue_begin = 0x0b
DW_LNS_set_isa = 0x0c
)
// Table 38
const (
DW_LNE_end_sequence = 0x01
DW_LNE_set_address = 0x02
DW_LNE_define_file = 0x03
DW_LNE_lo_user = 0x80
DW_LNE_hi_user = 0xff
)
// Table 39
const (
DW_MACINFO_define = 0x01
DW_MACINFO_undef = 0x02
DW_MACINFO_start_file = 0x03
DW_MACINFO_end_file = 0x04
DW_MACINFO_vendor_ext = 0xff
)
// Table 40.
const (
// operand,...
DW_CFA_nop = 0x00
DW_CFA_set_loc = 0x01 // address
DW_CFA_advance_loc1 = 0x02 // 1-byte delta
DW_CFA_advance_loc2 = 0x03 // 2-byte delta
DW_CFA_advance_loc4 = 0x04 // 4-byte delta
DW_CFA_offset_extended = 0x05 // ULEB128 register, ULEB128 offset
DW_CFA_restore_extended = 0x06 // ULEB128 register
DW_CFA_undefined = 0x07 // ULEB128 register
DW_CFA_same_value = 0x08 // ULEB128 register
DW_CFA_register = 0x09 // ULEB128 register, ULEB128 register
DW_CFA_remember_state = 0x0a
DW_CFA_restore_state = 0x0b
DW_CFA_def_cfa = 0x0c // ULEB128 register, ULEB128 offset
DW_CFA_def_cfa_register = 0x0d // ULEB128 register
DW_CFA_def_cfa_offset = 0x0e // ULEB128 offset
DW_CFA_def_cfa_expression = 0x0f // BLOCK
DW_CFA_expression = 0x10 // ULEB128 register, BLOCK
DW_CFA_offset_extended_sf = 0x11 // ULEB128 register, SLEB128 offset
DW_CFA_def_cfa_sf = 0x12 // ULEB128 register, SLEB128 offset
DW_CFA_def_cfa_offset_sf = 0x13 // SLEB128 offset
DW_CFA_val_offset = 0x14 // ULEB128, ULEB128
DW_CFA_val_offset_sf = 0x15 // ULEB128, SLEB128
DW_CFA_val_expression = 0x16 // ULEB128, BLOCK
DW_CFA_lo_user = 0x1c
DW_CFA_hi_user = 0x3f
// Opcodes that take an addend operand.
DW_CFA_advance_loc = 0x1 << 6 // +delta
DW_CFA_offset = 0x2 << 6 // +register (ULEB128 offset)
DW_CFA_restore = 0x3 << 6 // +register
)