arch/.unmaintained/arm-all/exec/ints.S

   1 /*  Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   2     $Id$
   3 */
   4
   5         .text
   6         .balign 16
   7         .globl  _sys_dispatch
   8
   9         /* asm entry of system task dispatcher */
  10 _sys_dispatch:
  11
  12         stmdb   sp!,{r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr}^
  13         mrs     r0, SPSR
  14         stmdb   sp!, {r0}
  15                                             // Save context onto stack,
  16                                             // What's on the stack looks
  17                                             // like the pt_regs structure from ptrace.h
  18         mov     r0, sp                      // r0 contains address of pt_regs
  19         bl      sys_Dispatch
  20         ldmdb   sp!, {r0}
  21         msr     SPSR, r0
  22         ldmdb   sp!,{r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr}^
  23
  24         /* Return from this function. There's no 'rts' instruction...*/
  25         /* the following function automatically restores pc and cpsr */
  26         subs    pc, lr, #4