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Thanks Rajan. In case of arm processor, the alignment trap behavior can be changed by simply echo a number into /proc/sys/debug/alignment bit behavior when set
--- ----------------- 0 A user process performing an unaligned memory access
will cause the kernel to print a message indicating
process name, pid, pc, instruction, address, and the
fault code.
1 The kernel will attempt to fix up the user process
performing the unaligned access. This is of course
slow (think about the floating point emulator) and
not recommended for production use. 2 The kernel will send a SIGBUS signal to the user process
performing the unaligned access.
I would like to know Is there similar type of implimentation avalilable for MIPS processor in linux-2.6.12 kernel to view or
log the unaligned access addresses and corresponding processor ID. Regards, Sathesh
Rajat Jain <rajat.noida.india@gmail.com> wrote:
On 2/22/07, sathesh babu wrote:
> Hi,
> I have ported linux-2.6.12 kernel on MIPS processor.I would like to
> print the warning messges whenenver kernel or user code try to access
> unaligned address ( including proceor ID ).
> Is there any configuration option avaliable in the kernel to view
> the unaligned address?
Ummm ... not sure about MIPS, but in i386, exception 17 is raised for
every unaligned access. alignment_check() is invoked for every such
access.
Regards,
Rajat
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