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2 **+-----------------------------------------------------------------------+**
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4 **| Copyright(c) 1998 - 2008 Texas Instruments. All rights reserved. |**
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33 **+-----------------------------------------------------------------------+**
34 ****************************************************************************/
35
36
37 #include <linux/stddef.h>
38
check_stack(unsigned long * base)39 unsigned long check_stack(unsigned long *base)
40 {
41
42 register unsigned long sp asm ("sp");
43 unsigned long retval = sp;
44 *base = ((sp & ~0x1fff) + 0x380);
45 return retval;
46 }
47
check_stack_start(unsigned long * base)48 unsigned long check_stack_start(unsigned long *base)
49 {
50 unsigned long i;
51 unsigned long from,to;
52
53 to = check_stack(&from);
54 *base = from;
55
56 /* run from the stack pointer down to the base */
57 for (i = from;i<to;i+=4)
58 {
59 /* fill up the pattern */
60 *(long *)i = 0xdeadbeef;
61 }
62 /* printk("check_stack_start: from =%x to=%x data=%x\n",from,to,*(long *)(from+4));*/
63 return to;
64 }
65
check_stack_stop(unsigned long * base)66 unsigned long check_stack_stop(unsigned long *base)
67 {
68 unsigned long i;
69 unsigned long from,to;
70
71 to = check_stack(&from);
72 *base = from;
73
74 /* run from the stack pointer down to the base */
75 for (i = from;i<to;i+=4)
76 {
77 /* check up the pattern */
78 if ((*(long *)i) != 0xdeadbeef)
79 break;
80 }
81
82 /*printk("check_stack_stop: from =%x to=%x data=%x data=%x i=0x%x\n",from,to,*(long *)from,*(long *)(from+4),i);*/
83 /* return the first time when the pattern doesn't match */
84 return i;
85 }
86
87
88