Re: How to obtain perl5/auto/IO/IO.so with global symbols?

Hi,

What do you get if you run ldd -v IO.so on each machine? (par/par/native)

I think that error might really mean that some other library couldn't be found ( Assuming the PAR filters you're using arent mixing things up )

Global symbols?? What global symbols? :)

$ nm -g IO.dll
nm: IO.dll: no symbols

$ objdump -t IO.dll

IO.dll:     file format pei-i386

SYMBOL TABLE:
no symbols



$ objdump -T IO.dll

IO.dll:     file format pei-i386

objdump: IO.dll: not a dynamic object
DYNAMIC SYMBOL TABLE:
no symbols



$ objdump -x IO.dll |grep -B22 boot_
There is an export table in .edata at 0x674c7000

The Export Tables (interpreted .edata section contents)

Export Flags                    0
Time/Date stamp                 507ac67e
Major/Minor                     0/0
Name                            00007028 dll.exp.dll
Ordinal Base                    1
Number in:
        Export Address Table            00000002
        [Name Pointer/Ordinal] Table    00000002
Table Addresses
        Export Address Table            00007034
        Name Pointer Table              0000703c
        Ordinal Table                   00007044

Export Address Table -- Ordinal Base 1
        [   0] +base[   1] 2670 Export RVA
        [   1] +base[   2] 2670 Export RVA

[Ordinal/Name Pointer] Table
        [   1] _boot_IO
        [   0] boot_IO
[download]

$ objdump -x IO.dll 
...
The Import Tables (interpreted .idata section contents)
 vma:            Hint    Time      Forward  DLL       First
                 Table   Stamp     Chain    Name      Thunk
 00008000       00008050 00000000 00000000 000088e4 00008198

        DLL Name: perl516.dll
        vma:  Hint/Ord Member-Name Bound-To
        82e0        4  PL_check
        82ec       51  PL_ppaddr
        82f8      132  PerlIO_getpos
...
        DLL Name: KERNEL32.dll
        DLL Name: msvcrt.dll
[download]

Comment on Re: How to obtain perl5/auto/IO/IO.so with global symbols? Select or Download Code

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Re^2: How to obtain perl5/auto/IO/IO.so with global symbols? by ek15 (Novice) on Feb 22, 2018 at 23:07 UTC
edit: For your question "what global symbols?", this is what I mean (the directly delivered executable from Company A). `[emk@ekdev2 IO]$ pwd /tmp/par-656d6b/cache-08da00fae2ebdaf6d8f69a0988dac72d0e1f3d62/inc/lib +/auto/IO [emk@ekdev2 IO]$ nm -g IO.so U PerlIO_getpos U PerlIO_setpos U PerlIO_tmpfile U PerlIO_ungetc U Perl_Isv_undef_ptr U Perl_Isv_yes_ptr U Perl_PerlIO_clearerr U Perl_PerlIO_error U Perl_PerlIO_fileno U Perl_PerlIO_flush ... 0000000000001760 T boot_IO U fcntl@@GLIBC_2.2.5 U fsync@@GLIBC_2.2.5 U poll@@GLIBC_2.2.5 U sockatmark@@GLIBC_2.2.5` [download] The following is what I get when I run ldd -v IO.so on each machine. The outputs are exactly the same, apart from the memory addresses. I ran ldd on the test machine's IO.so found in /tmp/par-..., and I ran ldd on the build machine's IO.so found in /usr/lib64/perl5/auto/IO. Just realized you probably meant to run ldd -v IO.so for the executable I got directly from Company A. I checked on that, and even that one has the same output for ldd -v. `linux-vdso.so.1 => (0x00007fff091de000) libc.so.6 => /lib64/libc.so.6 (0x00007f1a0386b000) /lib64/ld-linux-x86-64.so.2 (0x00007f1a03e47000) Version information: ./IO.so: libc.so.6 (GLIBC_2.2.5) => /lib64/libc.so.6 /lib64/libc.so.6: ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so. +2 ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64 +.so.2` [download]	[reply] [d/l] [select]
Re^3: How to obtain perl5/auto/IO/IO.so with global symbols? by beech (Parson) on Feb 23, 2018 at 22:46 UTC
Hi, So perl-5.16.3 RPM has stripped the symbols from IO.so ... What happens if you build your own IO.so? Does it have symbols then? See http://search.cpan.org/~toddr/IO-1.36_01/ or https://perl5.git.perl.org/perl.git/tree/HEAD:/dist/IO `cpanm --look TODDR/IO-1.36_01.tar.gz ... perl Makefile.PL make ... nm -g blib/arch/auto/IO/IO.so` [download]	[reply] [d/l]
Re^4: How to obtain perl5/auto/IO/IO.so with global symbols? by ek15 (Novice) on Mar 05, 2018 at 17:26 UTC
Hi. I built my own and it did have global symbols, but that did not fix the issue. The issue was fixed when I changed the Par packer Makefile (Makefile.packer) to no longer package libc.so.6. Many other libraries were also packed, but it seems like none of the packed libraries were used if the test system had its own version of that library. Libc.so.6 was the exception. Anyway, the issue is solved either way. Thanks for all your help.	[reply]
Re^3: How to obtain perl5/auto/IO/IO.so with global symbols? by beech (Parson) on Feb 22, 2018 at 23:32 UTC
Hi, The outputs are exactly the same Are you really really sure? What is the output of `LD_DEBUG=help ./switchscan ...`?	[reply] [d/l]
Re^4: How to obtain perl5/auto/IO/IO.so with global symbols? by ek15 (Novice) on Feb 22, 2018 at 23:50 UTC
Yes, I just went back and verified they are the same, apart from the last two lines being switched in order. Did you mean LD_DEBUG=help ./switchscan? That will just display the help message. Were you thinking of LD_DEBUG=libs ./switchscan?	[reply]
Re^5: How to obtain perl5/auto/IO/IO.so with global symbols? by beech (Parson) on Feb 23, 2018 at 00:07 UTC
Re^6: How to obtain perl5/auto/IO/IO.so with global symbols? by ek15 (Novice) on Feb 23, 2018 at 17:15 UTC


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