File: /usr/src/linux/arch/ppc/xmon/setjmp.c

1     /*
2      * BK Id: SCCS/s.setjmp.c 1.5 05/17/01 18:14:23 cort
3      */
4     /*
5      * Copyright (C) 1996 Paul Mackerras.
6      *
7      * NB this file must be compiled with -O2.
8      */
9     
10     int
11     xmon_setjmp(long *buf)
12     {
13         asm ("mflr 0; stw 0,0(%0);"
14     	 "stw 1,4(%0); stw 2,8(%0);"
15     	 "mfcr 0; stw 0,12(%0);"
16     	 "stmw 13,16(%0)"
17     	 : : "r" (buf));
18         /* XXX should save fp regs as well */
19         return 0;
20     }
21     
22     void
23     xmon_longjmp(long *buf, int val)
24     {
25         if (val == 0)
26     	val = 1;
27         asm ("lmw 13,16(%0);"
28     	 "lwz 0,12(%0); mtcrf 0x38,0;"
29     	 "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
30     	 "mtlr 0; mr 3,%1"
31     	 : : "r" (buf), "r" (val));
32     }
33