Hi Grant, The hardware is KwikByte KB9200 board from eCosCentric, which is based on the ARM9 AT91RM9200 processor. But more RAM and ROM are added.
I am new to the ARM architecture. Can someone confirm the processor does NOT generate exception on dividing by 0? Another odd thing I found is that It does NOT generate bad memory alignment exception either. For example, the following code will run just fine: unsigned int addr=0x00040041; *(int *)addr=0xFEFEFEFE; Should it generate a bad alignment exception? To me, it seems that either all the exceptions are blocked by HAL, or the hardware does not generate exception at all. How can I find out which case is true? I looked the file vectors.S. Is there any way I can find out any of the exception handler got invoked by printing out in the console? Of course, I can NOT call diag_printf() in vector.S, I mean by doing something similar but in assembly. Because I can not do hardware debuging like using JTAG. Thanks On Fri, Mar 4, 2011 at 6:20 PM, Grant Edwards <grant.b.edwa...@gmail.com> wrote: > On 2011-03-04, Grant Edwards <grant.b.edwa...@gmail.com> wrote: >> On 2011-03-04, Quanren Xiong <xion...@gmail.com> wrote: >> >>> I am using ECOS 2.0.33. To my suprise, the following code does NOT >>> generate an exception. >>> >>> "int b=1; int c=b/0;" The value in variable c will be 0. > >> You're expecting a run-time exception from something that doesn't >> actually execute at runtime. > > I think I got that one wrong. For some reason I convinced myself you > were talking about static variables, but the second initialize isn't > lebal for a static initializer. > > Perhaps your processor doesn't generate an exception for integer > divide by zero? > > -- > Grant Edwards grant.b.edwards Yow! The PINK SOCKS were > at ORIGINALLY from 1952!! > gmail.com But they went to MARS > around 1953!! > > > -- > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos > and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss > > -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
