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reset_vector single stepping..
- From: <vijay dot peshkar at wipro dot com>
- To: <ecos-discuss at ecos dot sourceware dot org>
- Date: Fri, 17 Feb 2006 14:44:22 +0530
- Subject: [ECOS] reset_vector single stepping..
Friends,
Am build a 'default' image for GRG(ixp425 based)and single stepping thru it in my sdram.
The intial instructions(msr, and, cmp), if single stepped result in will result in
R7 having value 0x10000013 and the beq succeeds in brancing to 20070.
But if I set a breakpoint further below, and 'go' to that point, then am seeing that
R7 gets the value 0x600000D3 and beq fails finally resulting in an exception after
few steps.
Why is it that when 'single stepped' the execution proceeds in right path else
Gives exceptions?.
00020040 <reset_vector>:
20040: e10f7000 mrs r7, CPSR
20044: e207701f and r7, r7, #31 ; 0x1f
20048: e3570013 cmp r7, #19 ; 0x13
2004c: 0a000007 beq 20070 <start>
Am running on a new ixp425 based board.
Regards,
Vijay
?
?
------------------------
Vijay Kumar .P
Wipro Technologies,
Tel: 30295119
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