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On 6/7/06, Toru Nishimura <locore64@alkyltechnology.com> wrote:
>
> Danny Lau wrote;
>
> > this time it is a character string: *p++ = "1234567890abcdef"[ul %
> base];
> > in that lib function. The MCU cann't get correct byte-data and raise an
> > Undefine instruction error.
>
> 0. nm -Bon
> 1. hexdump -C
> 2. objdump --disassemble
>
> objdump might make mis-interpretation since it has no clue about how
> the target binary is made for the specific CPU nature.
>
> Toru Nishimura/ALKYL Technology
>

You are right. So I trace the execution flow from the beginng when poweron
in the AXD via jtag. I can see the assembly code is "ldr/str" in the case I
use uint32 data type in my code, and "ldrb/strb" when I check that lib
function.

Every thing seems ok, but that exception still happen, still puzzle me, and
still I don't know why it occur.

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<br><br>
<div><span class="gmail_quote">On 6/7/06, <b class="gmail_sendername">Toru Nishimura</b> &lt;<a href="mailto:locore64@alkyltechnology.com">locore64@alkyltechnology.com</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Danny Lau wrote;<br><br>&gt; this time it is a character string: *p++ = &quot;1234567890abcdef&quot;[ul % base];
<br>&gt; in that lib function. The MCU cann't get correct byte-data and raise an<br>&gt; Undefine instruction error.<br><br>0. nm -Bon<br>1. hexdump -C<br>2. objdump --disassemble<br><br>objdump might make mis-interpretation since it has no clue about how
<br>the target binary is made for the specific CPU nature.<br><br>Toru Nishimura/ALKYL Technology<br></blockquote></div>
<div>&nbsp;</div>
<div>You are right. So I trace the&nbsp;execution flow from the beginng&nbsp;when poweron in the&nbsp;AXD&nbsp;via jtag. I can see the assembly code is &quot;ldr/str&quot; in the case I use uint32 data type in my code, and &quot;ldrb/strb&quot; when I check&nbsp;that lib function. 
</div>
<div>&nbsp;</div>
<div>Every thing seems ok, but that exception still happen, still puzzle me, and still I don't know why it occur.</div>

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