1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Helper functions for trap handlers
*
* Copyright (C) 2000-2007, Axis Communications AB.
*
* Authors: Bjorn Wesen
* Hans-Peter Nilsson
*
*/
#include <linux/ptrace.h>
#include <asm/uaccess.h>
#include <asm/arch/sv_addr_ag.h>
void
show_registers(struct pt_regs *regs)
{
/*
* It's possible to use either the USP register or current->thread.usp.
* USP might not correspond to the current process for all cases this
* function is called, and current->thread.usp isn't up to date for the
* current process. Experience shows that using USP is the way to go.
*/
unsigned long usp = rdusp();
printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n",
regs->irp, regs->srp, regs->dccr, usp, regs->mof);
printk(" r0: %08lx r1: %08lx r2: %08lx r3: %08lx\n",
regs->r0, regs->r1, regs->r2, regs->r3);
printk(" r4: %08lx r5: %08lx r6: %08lx r7: %08lx\n",
regs->r4, regs->r5, regs->r6, regs->r7);
printk(" r8: %08lx r9: %08lx r10: %08lx r11: %08lx\n",
regs->r8, regs->r9, regs->r10, regs->r11);
printk("r12: %08lx r13: %08lx oR10: %08lx sp: %08lx\n",
regs->r12, regs->r13, regs->orig_r10, (long unsigned)regs);
printk("R_MMU_CAUSE: %08lx\n", (unsigned long)*R_MMU_CAUSE);
printk("Process %s (pid: %d, stackpage=%08lx)\n",
current->comm, current->pid, (unsigned long)current);
/*
* When in-kernel, we also print out the stack and code at the
* time of the fault..
*/
if (!user_mode(regs)) {
int i;
show_stack(NULL, (unsigned long *)usp);
/*
* If the previous stack-dump wasn't a kernel one, dump the
* kernel stack now.
*/
if (usp != 0)
show_stack(NULL, NULL);
printk("\nCode: ");
if (regs->irp < PAGE_OFFSET)
goto bad_value;
/*
* Quite often the value at regs->irp doesn't point to the
* interesting instruction, which often is the previous
* instruction. So dump at an offset large enough that the
* instruction decoding should be in sync at the interesting
* point, but small enough to fit on a row. The regs->irp
* location is pointed out in a ksymoops-friendly way by
* wrapping the byte for that address in parenthesises.
*/
for (i = -12; i < 12; i++) {
unsigned char c;
if (__get_user(c, &((unsigned char *)regs->irp)[i])) {
bad_value:
printk(" Bad IP value.");
break;
}
if (i == 0)
printk("(%02x) ", c);
else
printk("%02x ", c);
}
printk("\n");
}
}
void
arch_enable_nmi(void)
{
asm volatile ("setf m");
}
extern void (*nmi_handler)(struct pt_regs *);
void handle_nmi(struct pt_regs *regs)
{
if (nmi_handler)
nmi_handler(regs);
/* Wait until nmi is no longer active. (We enable NMI immediately after
returning from this function, and we don't want it happening while
exiting from the NMI interrupt handler.) */
while (*R_IRQ_MASK0_RD & IO_STATE(R_IRQ_MASK0_RD, nmi_pin, active))
;
}
#ifdef CONFIG_DEBUG_BUGVERBOSE
void
handle_BUG(struct pt_regs *regs)
{
struct bug_frame f;
unsigned char c;
unsigned long irp = regs->irp;
if (__copy_from_user(&f, (const void __user *)(irp - 8), sizeof f))
return;
if (f.prefix != BUG_PREFIX || f.magic != BUG_MAGIC)
return;
if (__get_user(c, f.filename))
f.filename = "<bad filename>";
printk("kernel BUG at %s:%d!\n", f.filename, f.line);
}
#endif
|
