UL/FRI/UNI-RI/ARS2/Vaje/New:start.s

.text
.code 32

.global	_start
.global	start
start:
_start:
/* select user mode 
 CPSR[4:0]	Mode
 --------------
  10000	  User
  10001	  FIQ
  10010	  IRQ
  10011	  SVC
  10111	  Abort
  11011	  Undef
  11111	  System   
*/

 mrs r0, cpsr
 bic r0, r0, #0x1F   /* clear mode flags */  
 orr r0, r0, #0x10   /* set user mode */
 msr cpsr, r0     
 
/* init stack */
 ldr sp,_Lstack_end
 
/* main program */
 
 b _Lforever
           
/* use code here */

_Lforever:
 b _Lforever
 
 /* constants */
 
_Lstack_end:
 .long __STACK_END__

.end