arch/arm-all/posixc/vfork.s

   1 /*
   2  * vfork.s
   3  *
   4  *  Created on: Aug 5, 2009
   5  *      Author: misc
   6  *
   7  * $Id$
   8  */
   9
  10 #include "aros/arm/asm.h"
  11
  12         .text
  13         .align  2
  14         .global AROS_CDEFNAME(vfork)
  15         .type   AROS_CDEFNAME(vfork),%function
  16
  17 AROS_CDEFNAME(vfork):
  18         str     lr, [sp, #-4]!                  /* Store link register */
  19         sub     sp, sp, jmpbuf_SIZEOF           /* Create space for env structure */
  20         mov     r0, sp
  21         bl      setjmp                          /* Prepare setjmp */
  22
  23         ldr     r0, [sp, jmpbuf_SIZEOF]         /* restore link register */
  24         str     r0, [sp, retaddr]               /* save lr as first argument of env structure */
  25
  26         add     r0, sp, jmpbuf_SIZEOF + 4       /* save previous stack pointer into env structure */
  27         str     r0, [sp, #9*4]
  28
  29         mov     r0, sp                          /* Argument to vfork() */
  30         b       __vfork                         /* never return... */