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and subject line Bug#325837: libcln3c2 (mips/mipsel): trivial programs segfault
when using libcln
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Date: Wed, 31 Aug 2005 02:13:44 -0700
From: Steve Langasek <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: libcln3c2 (mips/mipsel): trivial programs segfault when using libcln
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Package: libcln3c2
Version: 1.1.9-5
Severity: grave
Justification: package unusable or mostly so
Hi Richard,
The current version of libcln3c2 is completely unusable on mips and
mipsel, causing segfaults in trivial programs linked against it. This
leads to a build failure of ginac on these architectures, when trying to
detect the availability of CLN.
I'm currently trying to get a build of cln on vaughan.debian.org with
debugging symbols enabled; in the meantime, here is as much of a
backtrace as gdb currently offers me:
Program received signal SIGSEGV, Segmentation fault.
0x2ab20010 in cln::cl_heap_weak_hashtable_1<cln::cl_rcpointer, cln::cl_rcpo=
inter>::garcol(cln::cl_heap*) () from ./libcln/usr/lib/libcln.so.3
(gdb) bt
#0 0x2ab20010 in cln::cl_heap_weak_hashtable_1<cln::cl_rcpointer, cln::cl_=
rcpointer>::garcol(cln::cl_heap*) () from ./libcln/usr/lib/libcln.so.3
warning: Warning: GDB can't find the start of the function at 0x8.
GDB is unable to find the start of the function at 0x8
and thus can't determine the size of that function's stack frame.
This means that GDB may be unable to access that stack frame, or
the frames below it.
This problem is most likely caused by an invalid program counter or
stack pointer.
However, if you think GDB should simply search farther back
=66rom 0x8 for code which looks like the beginning of a
function, you can increase the range of the search using the `set
heuristic-fence-post' command.
(gdb)
I'll leave my debugging build unpacked on vaughan once it's done, so
that you can poke at it if needed.
Thanks,
--=20
Steve Langasek Give me a lever long enough and a Free OS
Debian Developer to set it on, and I can move the world.
[EMAIL PROTECTED] http://www.debian.org/
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Date: Wed, 31 Aug 2005 22:42:48 +0200 (CEST)
From: "Richard B. Kreckel" <[EMAIL PROTECTED]>
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cc: Steve Langasek <[EMAIL PROTECTED]>
Subject: Re: Bug#325837: libcln3c2 (mips/mipsel): trivial programs segfault
when using libcln
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Hi Steve,
On Wed, 31 Aug 2005, Steve Langasek wrote:
> Package: libcln3c2
> Version: 1.1.9-5
> Severity: grave
> Justification: package unusable or mostly so
>
> Hi Richard,
>
> The current version of libcln3c2 is completely unusable on mips and
> mipsel, causing segfaults in trivial programs linked against it. This
> leads to a build failure of ginac on these architectures, when trying to
> detect the availability of CLN.
Thenks for your bugreport. I've been tracking it for the last few days
in every one of my few spare minutes. It has been observed [0] last week
that qalculate fails to build while trying to detect the availability of
CLN.
Yesterday I've duploaded cln_1.1.9-6 which is supposed to fix the bug on
mips and mipsel. (Well, I've only tried mips but theoretically the
bug/fix should be completely invariant under endianness.)
BTW: It turned out I had to change the assembler (in file
include/cln/modules.h) that inserts a jump instruction into the code. The
line commented out is the old one:
#if defined(__mips__) || defined(__mipsel__)
//#define CL_JUMP_TO(addr) ASM_VOLATILE("%*j %0" : : "d" ((void*)(addr)))
#define CL_JUMP_TO(addr) ASM_VOLATILE("b " ASM_UNDERSCORE_PREFIX #addr)
#endif
Do you have any slight idea why it stopped working?
I close this bug now. Please let me know if it turns out the problem
isn't fixed on mipsel.
Regards
-richy.
[0] <http://lists.debian.org/debian-mips/2005/08/msg00055.html>
--
.''`. Richard B. Kreckel
: :' : <[EMAIL PROTECTED]>
`. `' <[EMAIL PROTECTED]>
`- <http://www.ginac.de/~kreckel/>
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