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Re: debug crt0.s


Hier is an output for small executable:

C:\WINNT\system32>C:\Programme\ARM-Eclipse\GNUARM\bin\arm-elf-readelf.exe -wil C:\embedded\arm\workspace\functest\Debug\functest

Dump of debug contents of section .debug_line:

 Length:                      66
 DWARF Version:               2
 Prologue Length:             38
 Minimum Instruction Length:  2
 Initial value of 'is_stmt':  1
 Line Base:                   -5
 Line Range:                  14
 Opcode Base:                 10
 (Pointer size:               4)

Opcodes:
 Opcode 1 has 0 args
 Opcode 2 has 1 args
 Opcode 3 has 1 args
 Opcode 4 has 1 args
 Opcode 5 has 1 args
 Opcode 6 has 0 args
 Opcode 7 has 0 args
 Opcode 8 has 0 args
 Opcode 9 has 1 args

The Directory Table:
 ../src

The File Name Table:
 Entry Dir     Time    Size    Name
 1     1       0       0       comm_chan.s

Line Number Statements:
 Extended opcode 2: set Address to 0x40000114
 Advance Line by 9 to 10
 Copy
 Special opcode 34: advance Address by 4 to 0x40000118 and Line by 1 to 11
 Special opcode 34: advance Address by 4 to 0x4000011c and Line by 1 to 12
 Special opcode 35: advance Address by 4 to 0x40000120 and Line by 2 to 14
 Special opcode 34: advance Address by 4 to 0x40000124 and Line by 1 to 15
 Special opcode 34: advance Address by 4 to 0x40000128 and Line by 1 to 16
 Special opcode 36: advance Address by 4 to 0x4000012c and Line by 3 to 19
 Special opcode 36: advance Address by 4 to 0x40000130 and Line by 3 to 22
 Advance PC by 4 to 40000134
 Extended opcode 1: End of Sequence


Length: 125 DWARF Version: 2 Prologue Length: 33 Minimum Instruction Length: 2 Initial value of 'is_stmt': 1 Line Base: -5 Line Range: 14 Opcode Base: 10 (Pointer size: 4)

Opcodes:
 Opcode 1 has 0 args
 Opcode 2 has 1 args
 Opcode 3 has 1 args
 Opcode 4 has 1 args
 Opcode 5 has 1 args
 Opcode 6 has 0 args
 Opcode 7 has 0 args
 Opcode 8 has 0 args
 Opcode 9 has 1 args

The Directory Table:
 ../src

The File Name Table:
 Entry Dir     Time    Size    Name
 1     1       0       0       crt0.s

Line Number Statements:
 Extended opcode 2: set Address to 0x40000000
 Advance Line by 185 to 186
 Copy
 Special opcode 34: advance Address by 4 to 0x40000004 and Line by 1 to 187
 Special opcode 34: advance Address by 4 to 0x40000008 and Line by 1 to 188
 Special opcode 34: advance Address by 4 to 0x4000000c and Line by 1 to 189
 Special opcode 34: advance Address by 4 to 0x40000010 and Line by 1 to 190
 Special opcode 34: advance Address by 4 to 0x40000014 and Line by 1 to 191
 Special opcode 35: advance Address by 4 to 0x40000018 and Line by 2 to 193
 Special opcode 34: advance Address by 4 to 0x4000001c and Line by 1 to 194
 Advance PC by 4 to 40000020
 Extended opcode 1: End of Sequence

 Extended opcode 2: set Address to 0x40000020
 Advance Line by 73 to 74
 Copy
 Special opcode 34: advance Address by 4 to 0x40000024 and Line by 1 to 75
 Special opcode 35: advance Address by 4 to 0x40000028 and Line by 2 to 77
 Special opcode 38: advance Address by 4 to 0x4000002c and Line by 5 to 82
 Special opcode 34: advance Address by 4 to 0x40000030 and Line by 1 to 83
 Special opcode 34: advance Address by 4 to 0x40000034 and Line by 1 to 84
 Special opcode 34: advance Address by 4 to 0x40000038 and Line by 1 to 85
 Special opcode 34: advance Address by 4 to 0x4000003c and Line by 1 to 86
 Special opcode 34: advance Address by 4 to 0x40000040 and Line by 1 to 87
 Special opcode 34: advance Address by 4 to 0x40000044 and Line by 1 to 88
 Special opcode 34: advance Address by 4 to 0x40000048 and Line by 1 to 89
 Special opcode 34: advance Address by 4 to 0x4000004c and Line by 1 to 90
 Special opcode 34: advance Address by 4 to 0x40000050 and Line by 1 to 91
 Special opcode 34: advance Address by 4 to 0x40000054 and Line by 1 to 92
 Special opcode 34: advance Address by 4 to 0x40000058 and Line by 1 to 93
 Special opcode 34: advance Address by 4 to 0x4000005c and Line by 1 to 94
 Special opcode 34: advance Address by 4 to 0x40000060 and Line by 1 to 95
 Special opcode 34: advance Address by 4 to 0x40000064 and Line by 1 to 96
 Special opcode 34: advance Address by 4 to 0x40000068 and Line by 1 to 97
 Special opcode 34: advance Address by 4 to 0x4000006c and Line by 1 to 98
 Special opcode 34: advance Address by 4 to 0x40000070 and Line by 1 to 99
 Special opcode 35: advance Address by 4 to 0x40000074 and Line by 2 to 101
 Special opcode 35: advance Address by 4 to 0x40000078 and Line by 2 to 103
 Special opcode 34: advance Address by 4 to 0x4000007c and Line by 1 to 104
 Special opcode 34: advance Address by 4 to 0x40000080 and Line by 1 to 105
 Special opcode 35: advance Address by 4 to 0x40000084 and Line by 2 to 107
 Special opcode 36: advance Address by 4 to 0x40000088 and Line by 3 to 110
 Special opcode 35: advance Address by 4 to 0x4000008c and Line by 2 to 112
 Special opcode 35: advance Address by 4 to 0x40000090 and Line by 2 to 114
 Special opcode 35: advance Address by 4 to 0x40000094 and Line by 2 to 116
 Special opcode 36: advance Address by 4 to 0x40000098 and Line by 3 to 119
 Special opcode 34: advance Address by 4 to 0x4000009c and Line by 1 to 120
 Special opcode 34: advance Address by 4 to 0x400000a0 and Line by 1 to 121
 Special opcode 37: advance Address by 4 to 0x400000a4 and Line by 4 to 125
 Special opcode 35: advance Address by 4 to 0x400000a8 and Line by 2 to 127
 Special opcode 37: advance Address by 4 to 0x400000ac and Line by 4 to 131
 Special opcode 35: advance Address by 4 to 0x400000b0 and Line by 2 to 133
 Special opcode 35: advance Address by 4 to 0x400000b4 and Line by 2 to 135
 Special opcode 36: advance Address by 4 to 0x400000b8 and Line by 3 to 138
 Special opcode 34: advance Address by 4 to 0x400000bc and Line by 1 to 139
 Special opcode 34: advance Address by 4 to 0x400000c0 and Line by 1 to 140
 Special opcode 34: advance Address by 4 to 0x400000c4 and Line by 1 to 141
 Special opcode 39: advance Address by 4 to 0x400000c8 and Line by 6 to 147
 Special opcode 34: advance Address by 4 to 0x400000cc and Line by 1 to 148
 Special opcode 35: advance Address by 4 to 0x400000d0 and Line by 2 to 150
 Special opcode 34: advance Address by 4 to 0x400000d4 and Line by 1 to 151
 Special opcode 34: advance Address by 4 to 0x400000d8 and Line by 1 to 152
 Special opcode 38: advance Address by 4 to 0x400000dc and Line by 5 to 157
 Advance PC by 56 to 40000114
 Extended opcode 1: End of Sequence


Length: 594 DWARF Version: 2 Prologue Length: 565 Minimum Instruction Length: 2 Initial value of 'is_stmt': 1 Line Base: -5 Line Range: 14 Opcode Base: 10 (Pointer size: 4)

Opcodes:
 Opcode 1 has 0 args
 Opcode 2 has 1 args
 Opcode 3 has 1 args
 Opcode 4 has 1 args
 Opcode 5 has 1 args
 Opcode 6 has 0 args
 Opcode 7 has 0 args
 Opcode 8 has 0 args
 Opcode 9 has 1 args

The Directory Table:
 ../src
 C:/Programme/ARM-Eclipse/GNUARM/arm-elf/include
 C:/Programme/ARM-Eclipse/GNUARM/arm-elf/include/sys
 C:/Programme/ARM-Eclipse/GNUARM/arm-elf/include/machine
 C:/Programme/ARM-Eclipse/GNUARM/lib/gcc/arm-elf/4.0.1/include
 C:/embedded/arm/workspace/functest/inc

The File Name Table:
 Entry Dir     Time    Size    Name
 1     1       0       0       main.c
 2     2       0       0       stdio.h
 3     2       0       0       _ansi.h
 4     2       0       0       newlib.h
 5     3       0       0       config.h
 6     4       0       0       ieeefp.h
 7     5       0       0       stddef.h
 8     5       0       0       stdarg.h
 9     3       0       0       reent.h
 10    3       0       0       _types.h
 11    3       0       0       lock.h
 12    3       0       0       types.h
 13    4       0       0       types.h
 14    3       0       0       stdio.h
 15    2       0       0       errno.h
 16    3       0       0       errno.h
 17    2       0       0       string.h
 18    6       0       0       utypes.h
 19    6       0       0       serialio.h
 20    6       0       0       LPC2xsys.h
 21    6       0       0       lpc2292.h
 22    1       0       0       comm_chan.h
 23    1       0       0       commio.h
 24    1       0       0       PCPUcfg.h

Line Number Statements:
Extended opcode 2: set Address to 0x40000134
Advance Line by 143 to 144
Copy
Special opcode 124: advance Address by 16 to 0x40000144 and Line by 7 to 151
Special opcode 119: advance Address by 16 to 0x40000154 and Line by 2 to 153
Advance Line by 178 to 331
Special opcode 61: advance Address by 8 to 0x4000015c and Line by 0 to 331
Special opcode 34: advance Address by 4 to 0x40000160 and Line by 1 to 332
Advance PC by 8 to 40000168
Extended opcode 1: End of Sequence



The section .debug_info contains:


 Compilation Unit @ 0:
  Length:        105
  Version:       2
  Abbrev Offset: 0
  Pointer Size:  4
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
    DW_AT_stmt_list   : 0
    DW_AT_low_pc      : 0x40000114
    DW_AT_high_pc     : 0x40000134
    DW_AT_name        : ../src/comm_chan.s
    DW_AT_comp_dir    : /cygdrive/c/embedded/arm/workspace/functest/Debug
    DW_AT_producer    : GNU AS 2.16.1
    DW_AT_language    : 32769  (MIPS assembler)
 Compilation Unit @ 6d:
  Length:        92
  Version:       2
  Abbrev Offset: 20
  Pointer Size:  4
<0><78>: Abbrev Number: 1 (DW_TAG_compile_unit)
    DW_AT_stmt_list   : 0x46
    DW_AT_name        : ../src/crt0.s
    DW_AT_comp_dir    : /cygdrive/c/embedded/arm/workspace/functest/Debug
    DW_AT_producer    : GNU AS 2.16.1
    DW_AT_language    : 32769  (MIPS assembler)
 Compilation Unit @ cd:
  Length:        315
  Version:       2
  Abbrev Offset: 36
  Pointer Size:  4
<0><d8>: Abbrev Number: 1 (DW_TAG_compile_unit)
    DW_AT_macro_info  : 0
    DW_AT_stmt_list   : 0xc7
    DW_AT_high_pc     : 0x40000168
    DW_AT_low_pc      : 0x40000134
    DW_AT_producer    : GNU C 4.0.1
    DW_AT_language    : 1      (ANSI C)
    DW_AT_name        : ../src/main.c
    DW_AT_comp_dir    : /cygdrive/c/embedded/arm/workspace/functest/Debug
<1><136>: Abbrev Number: 2 (DW_TAG_base_type)
    DW_AT_name        : (indirect string, offset: 0x0): long unsigned int
    DW_AT_byte_size   : 4
    DW_AT_encoding    : 7      (unsigned)
<1><13d>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : int
    DW_AT_byte_size   : 4
    DW_AT_encoding    : 5      (signed)
<1><144>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : long int
    DW_AT_byte_size   : 4
    DW_AT_encoding    : 5      (signed)
<1><150>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : long long int
    DW_AT_byte_size   : 8
    DW_AT_encoding    : 5      (signed)
<1><161>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : unsigned int
    DW_AT_byte_size   : 4
    DW_AT_encoding    : 7      (unsigned)
<1><171>: Abbrev Number: 2 (DW_TAG_base_type)
    DW_AT_name        : (indirect string, offset: 0x0): long unsigned int
    DW_AT_byte_size   : 4
    DW_AT_encoding    : 7      (unsigned)
<1><178>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : unsigned char
    DW_AT_byte_size   : 1
    DW_AT_encoding    : 8      (unsigned char)
<1><189>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : short int
    DW_AT_byte_size   : 2
    DW_AT_encoding    : 5      (signed)
<1><196>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : char
    DW_AT_byte_size   : 1
    DW_AT_encoding    : 8      (unsigned char)
<1><19e>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : short unsigned int
    DW_AT_byte_size   : 2
    DW_AT_encoding    : 7      (unsigned)
<1><1b4>: Abbrev Number: 3 (DW_TAG_base_type)
    DW_AT_name        : long long unsigned int
    DW_AT_byte_size   : 8
    DW_AT_encoding    : 7      (unsigned)
<1><1ce>: Abbrev Number: 4 (DW_TAG_typedef)
    DW_AT_name        : DWORD
    DW_AT_decl_file   : 18
    DW_AT_decl_line   : 16
    DW_AT_type        : <136>
<1><1db>: Abbrev Number: 5 (DW_TAG_subprogram)
    DW_AT_sibling     : <206>
    DW_AT_external    : 1
    DW_AT_name        : main
    DW_AT_decl_file   : 1
    DW_AT_decl_line   : 144
    DW_AT_prototyped  : 1
    DW_AT_type        : <13d>
    DW_AT_low_pc      : 0x40000134
    DW_AT_high_pc     : 0x40000168
    DW_AT_frame_base  : 1 byte block: 5b       (DW_OP_reg11)
<2><1f7>: Abbrev Number: 6 (DW_TAG_variable)
    DW_AT_name        : mem
    DW_AT_decl_file   : 1
    DW_AT_decl_line   : 147
    DW_AT_type        : <206>
    DW_AT_location    : 2 byte block: 7b 70    (DW_OP_breg11: -16)
<1><206>: Abbrev Number: 7 (DW_TAG_volatile_type)
    DW_AT_type        : <1ce>



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