From: "Ivan Pantushev" <ipantushev@iname.com>
To: gdb@sources.redhat.com
Subject: Question about "gnu.linkonce.wi." sections - Solved
Date: Wed, 09 Nov 2005 15:21:00 -0000 [thread overview]
Message-ID: <20051109152137.438E21CE304@ws1-6.us4.outblaze.com> (raw)
Thanks to Daniel Jacobowitz who pointed that the linker script needs the line:
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
there are no more ".gnu.linkonce.wi.*" sections and the offsets make sense.
The initial "Question about "gnu.linkonce.wi." sections" (07 Nov 2005) follows:
Hello,
I am decoding the debugging information in an Elf/Dwarf_2 file and there
are references to type information in ".gnu.linkonce.wi.*" sections which
I don't know how to resolve (binutils 2.16.1 and gcc 4.0.2 were used).
Here is a part of the ".debug_info" section:
Compilation Unit @ 0:
Length: 79
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 : 0x100000
DW_AT_high_pc : 0x100090
DW_AT_name : startup.gas
DW_AT_comp_dir : d:\test
DW_AT_producer : GNU AS 2.16.1
DW_AT_language : 32769 (MIPS assembler)
Compilation Unit @ 53:
Length: 235
Version: 2
Abbrev Offset: 20
Pointer Size: 4
<0><5e>: Abbrev Number: 3 (DW_TAG_compile_unit)
DW_AT_macro_info : 0
DW_AT_stmt_list : 98
DW_AT_high_pc : 0x100090
DW_AT_low_pc : 0x100090
DW_AT_producer : GNU C 4.0.2 -g
DW_AT_language : 1 (ANSI C)
DW_AT_name : board.c
DW_AT_comp_dir : d:\test
- - -
<1><c2>: Abbrev Number: 6 (DW_TAG_array_type)
DW_AT_sibling : <d2>
DW_AT_type : <#19>
The last DW_AT_type references type information at offset 0x19, but there
is no such information in the .debug_info section.
There are 18 ".gnu.linkonce.wi.FILENAME.h.*" sections and there is a type
info at offset 19 in each of them (instead of * there is a hexadecimal
number like b10c314a for example).
How do I find out which ".gnu.linkonce.wi.FILENAME.h.*" section is the one
to be used for the type information (of the array type at offset 0xc2 in
the ".debug_info" section)?
Thank you for your time.
Greetings,
Ivan Pantushev
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