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authorMichal Simek <monstr@monstr.eu>2009-03-27 09:25:29 -0400
committerMichal Simek <monstr@monstr.eu>2009-03-27 09:25:29 -0400
commit65bc60930c32b4831800056c8e0a0571c9b6a0bf (patch)
tree0fe0039a8a5d725e32a754d99a34fc7d598bbb59 /arch/microblaze
parent7dcbbb2b17d4ef0d0541708eddfb720e2e422c3b (diff)
microblaze_v8: traps support
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/kernel/traps.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/traps.c b/arch/microblaze/kernel/traps.c
new file mode 100644
index 000000000000..fbdc533c61e3
--- /dev/null
+++ b/arch/microblaze/kernel/traps.c
@@ -0,0 +1,107 @@
1/*
2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/kernel.h>
12#include <linux/kallsyms.h>
13#include <linux/module.h>
14#include <linux/sched.h>
15#include <linux/debug_locks.h>
16
17#include <asm/exceptions.h>
18#include <asm/system.h>
19
20void trap_init(void)
21{
22 __enable_hw_exceptions();
23}
24
25void __bad_xchg(volatile void *ptr, int size)
26{
27 printk(KERN_INFO "xchg: bad data size: pc 0x%p, ptr 0x%p, size %d\n",
28 __builtin_return_address(0), ptr, size);
29 BUG();
30}
31EXPORT_SYMBOL(__bad_xchg);
32
33static int kstack_depth_to_print = 24;
34
35static int __init kstack_setup(char *s)
36{
37 kstack_depth_to_print = strict_strtoul(s, 0, 0);
38
39 return 1;
40}
41__setup("kstack=", kstack_setup);
42
43void show_trace(struct task_struct *task, unsigned long *stack)
44{
45 unsigned long addr;
46
47 if (!stack)
48 stack = (unsigned long *)&stack;
49
50 printk(KERN_NOTICE "Call Trace: ");
51#ifdef CONFIG_KALLSYMS
52 printk(KERN_NOTICE "\n");
53#endif
54 while (!kstack_end(stack)) {
55 addr = *stack++;
56 /*
57 * If the address is either in the text segment of the
58 * kernel, or in the region which contains vmalloc'ed
59 * memory, it *may* be the address of a calling
60 * routine; if so, print it so that someone tracing
61 * down the cause of the crash will be able to figure
62 * out the call path that was taken.
63 */
64 if (kernel_text_address(addr))
65 print_ip_sym(addr);
66 }
67 printk(KERN_NOTICE "\n");
68
69 if (!task)
70 task = current;
71
72 debug_show_held_locks(task);
73}
74
75void show_stack(struct task_struct *task, unsigned long *sp)
76{
77 unsigned long *stack;
78 int i;
79
80 if (sp == NULL) {
81 if (task)
82 sp = (unsigned long *) ((struct thread_info *)
83 (task->stack))->cpu_context.r1;
84 else
85 sp = (unsigned long *)&sp;
86 }
87
88 stack = sp;
89
90 printk(KERN_INFO "\nStack:\n ");
91
92 for (i = 0; i < kstack_depth_to_print; i++) {
93 if (kstack_end(sp))
94 break;
95 if (i && ((i % 8) == 0))
96 printk("\n ");
97 printk("%08lx ", *sp++);
98 }
99 printk("\n");
100 show_trace(task, stack);
101}
102
103void dump_stack(void)
104{
105 show_stack(NULL, NULL);
106}
107EXPORT_SYMBOL(dump_stack);