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Date:	Mon, 18 May 2009 04:45:44 +0100
From:	Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
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Subject:	Re: expr error
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Lenik wrote:
> ok,

  Thanks.

> Program received signal SIGSEGV, Segmentation fault.
> 0x05240000 in ?? ()
> (gdb) bt
> #0  0x05240000 in ?? ()
> #1  0x69181041 in ?? () from /usr/bin/cyggmp-3.dll
> #2  0x691c9000 in ?? () from /usr/bin/cyggmp-3.dll
> #3  0x691ca000 in ?? () from /usr/bin/cyggmp-3.dll
> #4  0x0022cdb8 in ?? ()
> #5  0x61020273 in per_module::run_ctors () from /usr/bin/cygwin1.dll
> #6  0x006fa418 in ?? ()
> #7  0x61020340 in dll::init () from /usr/bin/cygwin1.dll
> #8  0x00000000 in ?? ()
> (gdb) info files

  The info files output confirms there's nothing unusual loaded into the
process memory.  That makes me think it's not BLODA.  The presence of
cyggmp-3.dll in the stack trace is interesting; that stack trace looks like
it's probably correct, and we are running start-up constructors.

> Symbols from "/usr/bin/expr".

>     0x69181000 - 0x691c4db8 is .text in /usr/bin/cyggmp-3.dll
>     0x691c5000 - 0x691c8e54 is .data in /usr/bin/cyggmp-3.dll
>     0x691c9000 - 0x691c9004 is .rdata in /usr/bin/cyggmp-3.dll
>     0x691ca000 - 0x691ca170 is .bss in /usr/bin/cyggmp-3.dll
>     0x691cb000 - 0x691cf8c6 is .edata in /usr/bin/cyggmp-3.dll
>     0x691d0000 - 0x691d0410 is .idata in /usr/bin/cyggmp-3.dll
>     0x691d1000 - 0x691d2680 is .reloc in /usr/bin/cyggmp-3.dll
>     0x65b81000 - 0x65b86558 is .text in /usr/bin/cygintl-8.dll
>     0x65b87000 - 0x65b8703c is .data in /usr/bin/cygintl-8.dll
>     0x65b88000 - 0x65b88854 is .rdata in /usr/bin/cygintl-8.dll
>     0x65b89000 - 0x65b895d8 is .bss in /usr/bin/cygintl-8.dll
>     0x65b8a000 - 0x65b8a5ae is .edata in /usr/bin/cygintl-8.dll
>     0x65b8b000 - 0x65b8b7e0 is .idata in /usr/bin/cygintl-8.dll
>     0x65b8c000 - 0x65b8c460 is .reloc in /usr/bin/cygintl-8.dll
>     0x67c71000 - 0x67c86fe8 is .text in /usr/bin/cygiconv-2.dll
>     0x67c87000 - 0x67c87008 is .data in /usr/bin/cygiconv-2.dll
>     0x67c88000 - 0x67d6481c is .rdata in /usr/bin/cygiconv-2.dll
>     0x67d65000 - 0x67d654b8 is .bss in /usr/bin/cygiconv-2.dll
>     0x67d66000 - 0x67d66172 is .edata in /usr/bin/cygiconv-2.dll
>     0x67d67000 - 0x67d6734c is .idata in /usr/bin/cygiconv-2.dll
>     0x67d68000 - 0x67d68d00 is .reloc in /usr/bin/cygiconv-2.dll

  Now, this is interesting.  All your DLLs are in very different places to
mine, in a working instance of expr.exe:

        0x63f41000 - 0x63f84db8 is .text in /usr/bin/cyggmp-3.dll
        0x63f85000 - 0x63f88e54 is .data in /usr/bin/cyggmp-3.dll
        0x63f89000 - 0x63f89004 is .rdata in /usr/bin/cyggmp-3.dll
        0x63f8a000 - 0x63f8a170 is .bss in /usr/bin/cyggmp-3.dll
        0x63f8b000 - 0x63f8f8c6 is .edata in /usr/bin/cyggmp-3.dll
        0x63f90000 - 0x63f90410 is .idata in /usr/bin/cyggmp-3.dll
        0x63f91000 - 0x63f92680 is .reloc in /usr/bin/cyggmp-3.dll
        0x6f5c1000 - 0x6f5c6558 is .text in /usr/bin/cygintl-8.dll
        0x6f5c7000 - 0x6f5c703c is .data in /usr/bin/cygintl-8.dll
        0x6f5c8000 - 0x6f5c8854 is .rdata in /usr/bin/cygintl-8.dll
        0x6f5c9000 - 0x6f5c95d8 is .bss in /usr/bin/cygintl-8.dll
        0x6f5ca000 - 0x6f5ca5ae is .edata in /usr/bin/cygintl-8.dll
        0x6f5cb000 - 0x6f5cb7e0 is .idata in /usr/bin/cygintl-8.dll
        0x6f5cc000 - 0x6f5cc460 is .reloc in /usr/bin/cygintl-8.dll
        0x674c1000 - 0x674d6fe8 is .text in /usr/bin/cygiconv-2.dll
        0x674d7000 - 0x674d7008 is .data in /usr/bin/cygiconv-2.dll
        0x674d8000 - 0x675b481c is .rdata in /usr/bin/cygiconv-2.dll
        0x675b5000 - 0x675b54b8 is .bss in /usr/bin/cygiconv-2.dll
        0x675b6000 - 0x675b6172 is .edata in /usr/bin/cygiconv-2.dll
        0x675b7000 - 0x675b734c is .idata in /usr/bin/cygiconv-2.dll
        0x675b8000 - 0x675b8d00 is .reloc in /usr/bin/cygiconv-2.dll

  So I think you must have rebased, yes?  Interesting.

> (gdb) info reg
> eax            0x5240000    86245376
> ecx            0x7c80e6cb    2088822475
> edx            0x0    0
> ebx            0x1    1
> esp            0x22cd0c    0x22cd0c
> ebp            0x22cd18    0x22cd18
> esi            0x691c4da4    1763462564
> edi            0x20    32
> eip            0x5240000    0x5240000
> eflags         0x10206    [ PF IF RF ]
> cs             0x1b    27
> ss             0x23    35
> ds             0x23    35
> es             0x23    35
> fs             0x3b    59
> gs             0x0    0
> (gdb) info frame
> Stack level 0, frame at 0x22cd10:
>  eip = 0x5240000; saved eip 0x69181041
>  called by frame at 0x22cd14
>  Arglist at 0x22cd08, args:
>  Locals at 0x22cd08, Previous frame's sp is 0x22cd10
>  Saved registers:
>   eip at 0x22cd0c
> (gdb) quit

  Those all look sensible.  Right, I think I have a guess what's going on.
Please try re-installing libgmp3 using setup.exe and see if it solves the
problem for you.  I think this might be the same as

http://www.cygwin.com/ml/cygwin/2009-02/msg00461.html
http://www.cygwin.com/ml/cygwin/2009-02/msg00466.html
http://sourceware.org/ml/binutils/2008-07/msg00372.html

    cheers,
      DaveK


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