CC2530 zigbee模块概述与环境搭建

==================== ELF/DWARF from XLINK ==================== Updated: $Date: 2010-02-05 14:07:22 +0100 (fr, 05 feb 2010) $ Archived: $Revision: 42975 $ This document describes particularities of XLINK's ELF/DWARF output. ======== Contents ======== 1. Overview 2. Program Scope Entries 3. Type Entries 4. Source Line Information 5. C++ Names 6. Auto Variables 7. Supported Targets 8. Removed Variables 9. Call Frame Information 10. Note Section 11. Register tuples =========== 1. Overview =========== XLINK output conforms to ELF as described in "Executable and Linkable Format (ELF)", and DWARF version 2, as described in "DWARF Debugging Information Format" revision 2.0.0 (July 27, 1993), both part of the Tools Interface Standard Portable Formats Specification, Version 1.1. XLINK output is always an ELF executable file, not an ELF relocatable file. It can contain the following sections: .shstrtab Section names .strtab Strings .symtab Symbol table .debug_info DWARF debug info .debug_abbrev DWARF abbreviation table .debug_line DWARF source line info .debug_frame DWARF call frame info .debug_aranges DWARF quick lookup table .debug_pubnames DWARF quick lookup table .note.iar Note section with IAR format flags The .debug_info, .debug_abbrev, .debug_line, .debug_frame, .debug_aranges and .debug_pubnames sections are not output if the -yn format variant modifier is given. The -yw format variant modifier suppresses generation of the .debug_aranges section. The -yb format variant modifier suppresses generation of the .debug_pubnames section. The .debug_frame section is only output by the linker if the code was compiled with a compiler that provides this information (basically a compiler that uses UBROF 9 or later). ======================== 2. Program Scope Entries ======================== This is to specify which record types are used for each entry type. All DW_AT_location attributes use a single DW_OP_addr operation. Compilation Unit (DW_TAG_compile_unit) ---------------- Possible children: Variable Label Static Data Member Definition Function All types DW_AT_comp_dir DW_FORM_string DW_AT_name DW_FORM_string DW_AT_language DW_FORM_data1 DW_AT_stmt_list DW_FORM_data4 DW_AT_producer DW_FORM_string DW_AT_low_pc DW_FROM_addr DW_AT_high_pc DW_FROM_addr Note: The data for DW_AT_comp_dir is always an empty string ("") in output from XLINK, it is output only because one DWARF-reader demanded that it should be present. Variable (DW_TAG_variable) -------- DW_AT_type DW_FORM_ref_addr DW_AT_name DW_FORM_string DW_AT_external DW_FORM_flag For file scope variables DW_AT_location DW_FORM_block1 Label (DW_TAG_label) ----- DW_AT_name DW_FORM_string DW_AT_external DW_FORM_flag DW_AT_location DW_FORM_block1 Static Data Member Definition (DW_TAG_variable) ----------------------------- DW_AT_specification DW_FORM_ref_addr Declaration (in class) DW_AT_type DW_FORM_ref_addr DW_AT_name DW_FORM_string DW_AT_external DW_FORM_flag DW_AT_location DW_FORM_block1 Function (DW_TAG_subprogram) -------- Possible children: Variable Lexical Block DW_AT_name DW_FORM_string DW_AT_type DW_FORM_ref_addr DW_AT_external DW_FORM_data1 DW_AT_artificial DW_FORM_data1 DW_AT_decl_file DW_FORM_udata May be omitted DW_AT_decl_line DW_FORM_udata May be omitted DW_AT_decl_column DW_FORM_udata May be omitted DW_AT_low_pc DW_FORM_addr DW_AT_high_pc DW_FORM_addr Member Function Definition (DW_TAG_subprogram) -------------------------- Possible children: Variable Lexical Block DW_AT_specification DW_FORM_ref_addr Declaration (in class) DW_AT_decl_file DW_FORM_udata May be omitted DW_AT_decl_line DW_FORM_udata May be omitted DW_AT_decl_column DW_FORM_udata May be omitted DW_AT_low_pc DW_FORM_addr DW_AT_high_pc DW_FORM_addr Lexical Block (DW_TAG_lexical_block) ------------- Possible children: Variable Lexical Block DW_AT_low_pc DW_FORM_addr DW_AT_high_pc DW_FORM_addr =============== 3. Type Entries =============== Unless the -ym format variant modifier is used, type information is output once, in the first compilation unit, and then referred to using address-type references (DW_AT_FORM_ref_addr). In XLINK versions prior to XLINK 4.51S these references used offsets from the start of the .debug_info section. In XLINK versions starting with 4.51S the references use offsets from the start of the entire file, unless the -ys format variant modifier is used, in which case section offsets are used. See the note section for how to determine which was used. If the -ym format variant modifier is uses, type information is duplicated in each compilation unit, and referred to using compilation unit relative references (DW_AT_FORM_ref_udata). All DW_AT_data_member_location attributes use a single DW_OP_plus_uconst operation to encode an offset from the start of the containing object. Basic Type (DW_TAG_base_type) ---------- The "void" type has a a byte size of 0 and a DW_ATE_signed encoding. DW_AT_name DW_FORM_string DW_AT_encoding DW_FORM_data1 DW_AT_byte_size DW_FORM_data1 Typedef (DW_TAG_typedef) ------- DW_AT_type DW_FORM_ref_addr DW_AT_name DW_FORM_string Enum Type (DW_TAG_enumeration_type) --------- Possible children: Enum Constant DW_AT_name DW_FORM_string DW_AT_byte_size DW_FORM_udata Enum Constant (DW_TAG_enumerator) ------------- DW_AT_name DW_FORM_string DW_AT_const_value DW_FORM_udata Pointer To Member Type (DW_TAG_ptr_to_member_type) ---------------------- DW_AT_type DW_FORM_ref_addr DW_AT_containing_type DW_FORM_ref_addr Function Type (DW_TAG_subroutine_type) ------------- Possible children: Parameter Varargs Parameter DW_AT_type DW_FORM_ref_addr Not present for void functions DW_AT_prototyped DW_FORM_data1 Parameter (DW_TAG_formal_parameter) --------- DW_AT_type DW_FORM_ref_addr Varargs Parameter (DW_TAG_unspecified_parameters) ----------------- Pointer Type (DW_TAG_pointer_type) ------------ DW_AT_type DW_FORM_ref_addr DW_AT_address_class DW_FORM_data1 If address_class is wanted Reference Type (DW_TAG_reference_type) -------------- DW_AT_type DW_FORM_ref_addr DW_AT_address_class DW_FORM_data1 If address_class is wanted Array Type (DW_TAG_array_type) ---------- Possible children: Array Index DW_AT_type DW_FORM_ref_addr DW_AT_byte_size DW_FORM_udata Array Index (DW_TAG_subrange_type) ----------- DW_AT_count DW_FORM_udata Structure Type (DW_TAG_structure_type -------------- DW_TAG_union_type DW_TAG_class_type) P