arch/ppc/xmon/setjmp.c

   1 /*
   2  * Copyright (C) 1996 Paul Mackerras.
   3  *
   4  * NB this file must be compiled with -O2.
   5  */
   6
   7 int
   8 xmon_setjmp(long *buf)
   9 {
  10     asm ("mflr 0; stw 0,0(%0);"
  11          "stw 1,4(%0); stw 2,8(%0);"
  12          "mfcr 0; stw 0,12(%0);"
  13          "stmw 13,16(%0)"
  14          : : "r" (buf));
  15     /* XXX should save fp regs as well */
  16     return 0;
  17 }
  18
  19 void
  20 xmon_longjmp(long *buf, int val)
  21 {
  22     if (val == 0)
  23         val = 1;
  24     asm ("lmw 13,16(%0);"
  25          "lwz 0,12(%0); mtcrf 0x38,0;"
  26          "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
  27          "mtlr 0; mr 3,%1"
  28          : : "r" (buf), "r" (val));
  29 }