From: marco atzeri <marco.atzeri@gmail.com>
To: cygwin@cygwin.com
Subject: Re: rebase segfault
Date: Tue, 15 Jan 2013 22:04:00 -0000 [thread overview]
Message-ID: <50F5D246.6010902@gmail.com> (raw)
In-Reply-To: <20130115112406.GA13752@calimero.vinschen.de>
On 1/15/2013 12:24 PM, Corinna Vinschen wrote:
> On Jan 15 11:36, marco atzeri wrote:
>> On 1/15/2013 11:07 AM, Corinna Vinschen wrote:
>>> On Jan 15 09:43, marco atzeri wrote:
>>>> rebase is segfaulting on two dlls of new package
>>>>
>>>> postgresql-contrib-9.2.2-1
>>>>
>>>> Full packages here
>>>> http://matzeri.altervista.org/cygwin-1.7/postgresql/
>>>>
>>>> Just the two dll's here:
>>>> http://matzeri.altervista.org/works/rebase/
>>>>
>>>> for i in *.dll; do echo $i ; rebase -O $i ; done
>>>>
>>>> dict_snowball.dll
>>>> Segmentation fault (core dumped)
>>>>
>>>> ltree.dll
>>>> Segmentation fault (core dumped)
>>>
>>> I don't know exactly what's going on here, but there's a common
>>> factor:
>>> [...]
>>> Both DLLs have a section .gnu_deb, whatever that one is good for.
>>> Rebase crashes both times when trying to relocate this .gnu_deb section.
>>> As you can see, the .gnu_deb section is pretty small, only 28 resp. 20
>>> bytes. What happens is that the relocation information for the .gnu_deb
>>> section appears to be too big. In case of dict_snowball.dll, the reloc
>>> info covers 44 relocation entries. The segfault occurs as soon as one
>>> entry translates into a memory address which is beyond the committed
>>> area of the file memory map.
>>> [...]
>>
>> It seems the result of the .dbg creation, that trunks
>> wrongly the sections.
>> [...]
>> for what I can see a dll with debug symbols
>> should have a .gnu_debuglink sections:
>
> Right. Something's scrambled. AFAIK, the .gnu_debuglink is not
> relocatable, it only contains a path. ".gnu_deb" appears to be
> a result of using only the fixed 8 bytes of the section name.
> Yaakov, do you have any idea what's going on here?
it seems that objcopy is considering the
--long-section-names {enable|disable|keep}
as disable (or keeping an incorrect disable)
using in sequence on a stripped ltree.dll
$ objcopy -v --add-gnu-debuglink="ltree.dll.dbg" ltree.dll
$ objcopy -v --long-section-names enable
--add-gnu-debuglink="ltree.dll.dbg" ltree.dll
$ objdump -h ltree.dll
ltree.dll: file format pei-i386
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 000088a8 6fc81000 6fc81000 00000400 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE, DATA
1 .data 00000dc0 6fc8a000 6fc8a000 00008e00 2**5
CONTENTS, ALLOC, LOAD, DATA
2 .bss 000000f8 6fc8b000 6fc8b000 00000000 2**5
ALLOC
3 .edata 00000e3c 6fc8c000 6fc8c000 00009c00 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .idata 000005b8 6fc8d000 6fc8d000 0000ac00 2**2
CONTENTS, ALLOC, LOAD, DATA
5 .reloc 00000adc 6fc8e000 6fc8e000 0000b200 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .gnu_deb 00000014 6fc8f000 6fc8f000 0000be00 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .gnu_debuglink 00000014 6fc90000 6fc90000 0000c000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
I consider this a bug of objcopy:
"--add-gnu-debuglink" should imply "--long-section-names enable"
>
>
> Corinna
>
Regards
MArco
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next prev parent reply other threads:[~2013-01-15 22:04 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-15 8:44 marco atzeri
2013-01-15 10:08 ` Corinna Vinschen
2013-01-15 10:36 ` marco atzeri
2013-01-15 11:24 ` Corinna Vinschen
2013-01-15 22:04 ` marco atzeri [this message]
2013-01-16 7:16 ` marco atzeri
2013-01-16 12:35 ` Binutils objcopy bug (was Re: rebase segfault) Corinna Vinschen
2013-01-16 13:38 ` marco atzeri
2013-01-16 14:42 ` Corinna Vinschen
2013-01-16 15:12 ` marco atzeri
2013-01-16 16:26 ` Corinna Vinschen
2013-01-24 9:02 ` Yaakov
2013-01-24 9:28 ` Corinna Vinschen
2013-01-24 9:49 ` marco atzeri
2013-01-24 10:01 ` Corinna Vinschen
2013-01-24 10:16 ` marco atzeri
2013-01-24 12:09 ` Corinna Vinschen
2013-01-24 12:35 ` marco atzeri
2013-01-24 14:12 ` Corinna Vinschen
2013-01-25 12:34 ` marco atzeri
2013-01-25 13:20 ` Kai Tietz
2013-01-25 15:01 ` Corinna Vinschen
2013-01-25 15:12 ` marco atzeri
2013-01-26 6:32 ` Reini Urban
2013-01-26 7:53 ` marco atzeri
2013-01-29 22:30 ` Reini Urban
2013-01-30 16:46 ` Andrew Dunstan
2013-01-30 17:03 ` marco atzeri
2013-03-04 20:01 ` Andrew Dunstan
2013-03-04 21:30 ` marco atzeri
2013-03-04 21:41 ` Andrew Dunstan
2013-03-04 22:32 ` Andrew Dunstan
2013-03-05 5:42 ` marco atzeri
2013-03-05 15:39 ` Andrew Dunstan
2013-01-25 13:22 ` Kai Tietz
2013-01-24 15:56 ` Christopher Faylor
2013-01-24 16:17 ` marco atzeri
2013-01-18 15:34 ` marco atzeri
2013-01-18 15:44 ` Christopher Faylor
2013-01-19 8:56 ` marco atzeri
2013-01-19 15:23 ` Corinna Vinschen
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