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Re: Problem with DWARF2 debug info for DJGPP
- From: "Mark E." <snowball3 at softhome dot net>
- To: djgpp-workers at delorie dot com, binutils at sources dot redhat dot com
- Date: Fri, 09 Aug 2002 19:24:33 -0400
- Subject: Re: Problem with DWARF2 debug info for DJGPP
> > I'm getting error message about wrong DWARF2 abbrev when attemting to link
> > program which contains reference to unresolved symbol
>
> If you could provide a simple testcase, I'll look into it...
>
The message is quite easy to reproduce. This testcase will do it:
extern int foo
int main()
{
return foo;
}
The output of 'gcc -S -gdwarf-2' is below. Does gcc 3.1 for linux produce
similiar dwarf2 info?
gcc -S -gdwarf-2 produces:
.file "x.c"
.file 1 "x.c"
.section .debug_abbrev,""
Ldebug_abbrev0:
.section .debug_info,""
Ldebug_info0:
.section .debug_line,""
Ldebug_line0:
.section .text
Ltext0:
.p2align 1
.globl _main
_main:
LFB1:
.loc 1 4 0
pushl %ebp
LCFI0:
movl %esp, %ebp
LCFI1:
subl $8, %esp
LCFI2:
andl $-16, %esp
movl $0, %eax
subl %eax, %esp
.loc 1 5 0
movl $1, %eax
.loc 1 6 0
leave
ret
LFE1:
.section .debug_frame,""
Lframe0:
.long LECIE0-LSCIE0
LSCIE0:
.long 0xffffffff
.byte 0x1
.ascii "\0"
.uleb128 0x1
.sleb128 -4
.byte 0x8
.byte 0xc
.uleb128 0x5
.uleb128 0x4
.byte 0x88
.uleb128 0x1
.p2align 2
LECIE0:
LSFDE0:
.long LEFDE0-LASFDE0
LASFDE0:
.long Lframe0
.long LFB1
.long LFE1-LFB1
.byte 0x4
.long LCFI0-LFB1
.byte 0xe
.uleb128 0x8
.byte 0x84
.uleb128 0x2
.byte 0x4
.long LCFI1-LCFI0
.byte 0xd
.uleb128 0x4
.p2align 2
LEFDE0:
.section .text
Letext0:
.section .debug_info,""
.long 0x54
.word 0x2
.long Ldebug_abbrev0
.byte 0x4
.uleb128 0x1
.long Ldebug_line0
.long Letext0
.long Ltext0
.ascii "x.c\0"
.ascii "d:/djgpp/projects\0"
.ascii "GNU C 3.1\0"
.byte 0x1
.uleb128 0x2
.byte 0x1
.ascii "main\0"
.byte 0x1
.byte 0x4
.long 0x50
.long LFB1
.long LFE1
.byte 0x1
.byte 0x55
.uleb128 0x3
.ascii "int\0"
.byte 0x4
.byte 0x5
.byte 0x0
.section .debug_abbrev,""
.uleb128 0x1
.uleb128 0x11
.byte 0x1
.uleb128 0x10
.uleb128 0x6
.uleb128 0x12
.uleb128 0x1
.uleb128 0x11
.uleb128 0x1
.uleb128 0x3
.uleb128 0x8
.uleb128 0x1b
.uleb128 0x8
.uleb128 0x25
.uleb128 0x8
.uleb128 0x13
.uleb128 0xb
.byte 0x0
.byte 0x0
.uleb128 0x2
.uleb128 0x2e
.byte 0x0
.uleb128 0x3f
.uleb128 0xc
.uleb128 0x3
.uleb128 0x8
.uleb128 0x3a
.uleb128 0xb
.uleb128 0x3b
.uleb128 0xb
.uleb128 0x49
.uleb128 0x13
.uleb128 0x11
.uleb128 0x1
.uleb128 0x12
.uleb128 0x1
.uleb128 0x40
.uleb128 0xa
.byte 0x0
.byte 0x0
.uleb128 0x3
.uleb128 0x24
.byte 0x0
.uleb128 0x3
.uleb128 0x8
.uleb128 0xb
.uleb128 0xb
.uleb128 0x3e
.uleb128 0xb
.byte 0x0
.byte 0x0
.byte 0x0
.section .debug_pubnames,""
.long 0x17
.word 0x2
.long Ldebug_info0
.long 0x58
.long 0x39
.ascii "main\0"
.long 0x0
.section .debug_aranges,""
.long 0x1c
.word 0x2
.long Ldebug_info0
.byte 0x4
.byte 0x0
.word 0x0
.word 0x0
.long Ltext0
.long Letext0-Ltext0
.long 0x0
.long 0x0
.ident "GCC: (GNU) 3.1"
Mark