aboutsummaryrefslogtreecommitdiffstats
path: root/arch/um/kernel/sysrq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um/kernel/sysrq.c')
-rw-r--r--arch/um/kernel/sysrq.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c
new file mode 100644
index 000000000000..e630438f9e73
--- /dev/null
+++ b/arch/um/kernel/sysrq.c
@@ -0,0 +1,81 @@
1/*
2 * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/sched.h"
7#include "linux/kernel.h"
8#include "linux/module.h"
9#include "linux/kallsyms.h"
10#include "asm/page.h"
11#include "asm/processor.h"
12#include "sysrq.h"
13#include "user_util.h"
14
15void show_trace(unsigned long * stack)
16{
17 /* XXX: Copy the CONFIG_FRAME_POINTER stack-walking backtrace from
18 * arch/i386/kernel/traps.c, and then move this to sys-i386/sysrq.c.*/
19 unsigned long addr;
20
21 if (!stack) {
22 stack = (unsigned long*) &stack;
23 WARN_ON(1);
24 }
25
26 printk("Call Trace: \n");
27 while (((long) stack & (THREAD_SIZE-1)) != 0) {
28 addr = *stack;
29 if (__kernel_text_address(addr)) {
30 printk("%08lx: [<%08lx>]", (unsigned long) stack, addr);
31 print_symbol(" %s", addr);
32 printk("\n");
33 }
34 stack++;
35 }
36 printk("\n");
37}
38
39/*
40 * stack dumps generator - this is used by arch-independent code.
41 * And this is identical to i386 currently.
42 */
43void dump_stack(void)
44{
45 unsigned long stack;
46
47 show_trace(&stack);
48}
49EXPORT_SYMBOL(dump_stack);
50
51/*Stolen from arch/i386/kernel/traps.c */
52static int kstack_depth_to_print = 24;
53
54/* This recently started being used in arch-independent code too, as in
55 * kernel/sched.c.*/
56void show_stack(struct task_struct *task, unsigned long *esp)
57{
58 unsigned long *stack;
59 int i;
60
61 if (esp == NULL) {
62 if (task != current) {
63 esp = (unsigned long *) KSTK_ESP(task);
64 /* Which one? No actual difference - just coding style.*/
65 //esp = (unsigned long *) PT_REGS_IP(&task->thread.regs);
66 } else {
67 esp = (unsigned long *) &esp;
68 }
69 }
70
71 stack = esp;
72 for(i = 0; i < kstack_depth_to_print; i++) {
73 if (kstack_end(stack))
74 break;
75 if (i && ((i % 8) == 0))
76 printk("\n ");
77 printk("%08lx ", *stack++);
78 }
79
80 show_trace(esp);
81}