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1 /* $Id: traps.c,v 1.11 2005/01/24 16:03:19 orjanf Exp $
3 * linux/arch/cris/traps.c
5 * Here we handle the break vectors not used by the system call
6 * mechanism, as well as some general stack/register dumping
9 * Copyright (C) 2000-2002 Axis Communications AB
11 * Authors: Bjorn Wesen
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <asm/pgtable.h>
19 #include <asm/uaccess.h>
21 static int kstack_depth_to_print
= 24;
23 extern int raw_printk(const char *fmt
, ...);
25 void show_trace(unsigned long * stack
)
27 unsigned long addr
, module_start
, module_end
;
28 extern char _stext
, _etext
;
31 raw_printk("\nCall Trace: ");
34 module_start
= VMALLOC_START
;
35 module_end
= VMALLOC_END
;
37 while (((long) stack
& (THREAD_SIZE
-1)) != 0) {
38 if (__get_user (addr
, stack
)) {
39 /* This message matches "failing address" marked
40 s390 in ksymoops, so lines containing it will
41 not be filtered out by ksymoops. */
42 raw_printk ("Failing address 0x%lx\n", (unsigned long)stack
);
48 * If the address is either in the text segment of the
49 * kernel, or in the region which contains vmalloc'ed
50 * memory, it *may* be the address of a calling
51 * routine; if so, print it so that someone tracing
52 * down the cause of the crash will be able to figure
53 * out the call path that was taken.
55 if (((addr
>= (unsigned long) &_stext
) &&
56 (addr
<= (unsigned long) &_etext
)) ||
57 ((addr
>= module_start
) && (addr
<= module_end
))) {
58 if (i
&& ((i
% 8) == 0))
60 raw_printk("[<%08lx>] ", addr
);
67 * These constants are for searching for possible module text
68 * segments. MODULE_RANGE is a guess of how much space is likely
72 #define MODULE_RANGE (8*1024*1024)
75 * The output (format, strings and order) is adjusted to be usable with
76 * ksymoops-2.4.1 with some necessary CRIS-specific patches. Please don't
77 * change it unless you're serious about adjusting ksymoops and syncing
78 * with the ksymoops maintainer.
82 show_stack(struct task_struct
*task
, unsigned long *sp
)
84 unsigned long *stack
, addr
;
88 * debugging aid: "show_stack(NULL);" prints a
94 sp
= (unsigned long*)task
->thread
.ksp
;
96 sp
= (unsigned long*)rdsp();
101 raw_printk("\nStack from %08lx:\n ", (unsigned long)stack
);
102 for(i
= 0; i
< kstack_depth_to_print
; i
++) {
103 if (((long) stack
& (THREAD_SIZE
-1)) == 0)
105 if (i
&& ((i
% 8) == 0))
107 if (__get_user (addr
, stack
)) {
108 /* This message matches "failing address" marked
109 s390 in ksymoops, so lines containing it will
110 not be filtered out by ksymoops. */
111 raw_printk ("Failing address 0x%lx\n", (unsigned long)stack
);
115 raw_printk("%08lx ", addr
);
120 static void (*nmi_handler
)(struct pt_regs
*);
121 extern void arch_enable_nmi(void);
123 void set_nmi_handler(void (*handler
)(struct pt_regs
*))
125 nmi_handler
= handler
;
129 void handle_nmi(struct pt_regs
* regs
)
135 #ifdef CONFIG_DEBUG_NMI_OOPS
136 void oops_nmi_handler(struct pt_regs
* regs
)
139 raw_printk("NMI!\n");
140 show_registers(regs
);
144 __init
oops_nmi_register(void)
146 set_nmi_handler(oops_nmi_handler
);
150 __initcall(oops_nmi_register
);
155 /* displays a short stack trace */
160 unsigned long *sp
= (unsigned long *)rdusp();
162 raw_printk("Stack dump [0x%08lx]:\n", (unsigned long)sp
);
163 for(i
= 0; i
< 16; i
++)
164 raw_printk("sp + %d: 0x%08lx\n", i
*4, sp
[i
]);
169 void dump_stack(void)
171 show_stack(NULL
, NULL
);
174 EXPORT_SYMBOL(dump_stack
);
179 /* Nothing needs to be done */
182 void spinning_cpu(void* addr
)
184 raw_printk("CPU %d spinning on %X\n", smp_processor_id(), addr
);