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assembler version of "set $cpsr = 0xd3"
- To: gdb at sources dot redhat dot com
- Subject: assembler version of "set $cpsr = 0xd3"
- From: "Odd Lindahl" <odd dot lindahl at mail dot com>
- Date: Thu, 14 Jun 2001 17:07:29 +0800
Hi all,
I have writen a program to my AT91EB40 boards flash at 0x10100000
and I want to execute it after reset by putting the switch, SW1, in the
UPPER MEM position.
The program doesn't work correctly though :-(
But if I boot in Angel mode and issue the gdb commands:
set rdiromatzero 1
set remotebaud 9600
target rdi com1
set $cpsr = 0xd3
jump *0x01010000
( or either of jump *0x01000000 and jump *0x01010000 with the switch in
UPPER MEM position)
it starts up fine!!
But if I skipp the "set $cpsr = 0xd3" command it wont run correctly.
So what exactly does the "set $cpsr = 0xd3" command do and
how do I replace the mode switch in software that I can flash.
I have tried with the instruction:
swi
as the very first instruction which puts my CPU in supervisor mode and
which I have made sure will return to the address following the swi instruction.
But this didn't do the trick.
Kind Regards
Odd
--
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