[Gdb] assembler version of "set $cpsr = 0xd3"

[Odd Lindahl]

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" command do and how do I replace the mode switch in software that I can flash.

I have tried with:
mrs     r0, cpsr
bic     r0, r0, #0x1f
orr     r0, r0, #0xd3
msr     cpsr, r0

at address 0x01010000 and onwards just before the rest of the code. But this didn't do the trick.

Kind Regards
Odd