On Tue, Sep 19, 2006 at 10:31:38PM +0200, Daniel Smolik wrote:
> Package: sparc-utils
> Version: 1.9-2.5
> Severity: important
>
> In newer kernel > 2.6.18-rc1 is changed /dev/openprom interface (may be)
> and eeprom tool dies with SIGBUS. On 2.6.17 works. There is a backtrace.
> NU gdb 6.4.90-debian
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> This GDB was configured as "sparc-linux-gnu"...Using host libthread_db
> library "/lib/libthread_db.so.1".
>
> (gdb) run
> Starting program: /home/marvin/sparc-utils-1.9.orig/prtconf-1.3/eeprom
>
> Program received signal SIGBUS, Bus error.
> 0x00012160 in main (argc=0, argv=<value optimized out>) at eeprom.c:661
> 661 *(int *)op->oprom_array = 0;
> (gdb) bt
> #0 0x00012160 in main (argc=0, argv=<value optimized out>) at eeprom.c:661
> (gdb)
Hello Daniel,
I don't have access to a sparc workstation anymore. All those from
debian network are currently down, therefore it is hard for me to
investigate.
SIGBUS is raised on non aligned access. But I don't know why it fails
here. Code just above this line to set up 'op' pointer seems to be ok:
char buf2[4096];
struct openpromio *op = (struct openpromio *)buf2;
op is an alias to buf2. I guess buf2 is aligned on a 32-bits boundary
since it is allocated on stack and is a multiple of 4 bytes. Therefore I
cannot figure out what fails.
Did you recompile sparc-utils package? What your asm/openpromio.h
header contains about openpromio struct definition?
The last I can find is from 2.6.17 kernel:
struct openpromio
{
u_int oprom_size; /* Actual size of the oprom_array. */
char oprom_array[1]; /* Holds property names and values. */
};
Could you print out addresses of 'op' pointer and op->oprom_array field
under gdb to see whether they are 32-bits aligned or not?
Best regards,
Eric.
--
Eric Delaunay | Le travail est trop sérieux pour le confier
[EMAIL PROTECTED] | à ceux qui veulent se tuer avec. Jissey.
