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Message
From: Marko Mlinar <markom@o...>
Date: Thu, 11 Sep 2003 08:09:19 +0200
Subject: Re: [openrisc] SIGBUS when using eCos diag_printf
Robert,
my guess would be that pointers for string decoding in libc are not set-up
correctly or get messed-up. Usually libc libraries detect whether your string
has something to replace e.g. % characters, also usually it has some last
used combination cached. If there is something to replace it allocates new
string or uses some static (more often) space, where it works. I am not
familiar with library you are using, so I unfortunately cannot be more
specific.
hope it helps anyway,
Marko
On Wednesday 10 September 2003 19:19, Robert Cragie wrote:
> This is a bit of a long shot posting here, but I was wondering if anyone
> else has experienced this problem. I am getting a SIGBUS (bus error)
> exception when trying to call the printf supplied with eCos. This is
> generic code and works fine on all other eCos platforms, so the problem
> must be something to do with the OpenRISC environment.
>
> If I do:
>
> diag_printf("Just a string\n");
>
> it seems to work OK.
>
> However, if I do:
>
> diag_printf("Print an integer %d\n", integer);
>
> it bombs out of GDB with something like this:
>
> Program received signal SIGBUS, Bus error.
> 0x00007f9c in _cvt(unsigned long long, char*, long, char*) (val=1987,
> buf=0xcc0c "", radix=10, digits=0x1116c "0123456789")
> at /home/rcc/ecos-sr/ecos/packages/infra/current/src/diag.cxx:273
> 273 *cp++ = digits[val % radix];
> Current language: auto; currently c++
>
> I am using GDB 5.3 and GCC 3.2.3 from the OpenCores CVS server.
>
> Anyone seen this, or any ideas what might be going on? My feeling is it's
> something to do with the 'val % radix' expression - 'val' being unsigned
> long long etc and the associated math library. I will continue to
> investigate further and see if I can spot anything odd.
>
> Robert Cragie, Design Engineer
> _______________________________________________________________
> Jennic Ltd, Furnival Street, Sheffield, S1 4QT, UK
> http://www.jennic.com Tel: +44 (0) 114 281 2655
> _______________________________________________________________
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