MIPS: SB1250: Include correct header and fix a warning
[linux-2.6/linux-mips.git] / arch / x86 / kernel / dumpstack_32.c
blob11540a189d9311e6a0fb4c44e685fc82799fdd0e
1 /*
2 * Copyright (C) 1991, 1992 Linus Torvalds
3 * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
4 */
5 #include <linux/kallsyms.h>
6 #include <linux/kprobes.h>
7 #include <linux/uaccess.h>
8 #include <linux/hardirq.h>
9 #include <linux/kdebug.h>
10 #include <linux/module.h>
11 #include <linux/ptrace.h>
12 #include <linux/kexec.h>
13 #include <linux/sysfs.h>
14 #include <linux/bug.h>
15 #include <linux/nmi.h>
17 #include <asm/stacktrace.h>
19 #include "dumpstack.h"
22 void dump_trace(struct task_struct *task, struct pt_regs *regs,
23 unsigned long *stack, unsigned long bp,
24 const struct stacktrace_ops *ops, void *data)
26 int graph = 0;
28 if (!task)
29 task = current;
31 if (!stack) {
32 unsigned long dummy;
34 stack = &dummy;
35 if (task && task != current)
36 stack = (unsigned long *)task->thread.sp;
39 #ifdef CONFIG_FRAME_POINTER
40 if (!bp) {
41 if (task == current) {
42 /* Grab bp right from our regs */
43 get_bp(bp);
44 } else {
45 /* bp is the last reg pushed by switch_to */
46 bp = *(unsigned long *) task->thread.sp;
49 #endif
51 for (;;) {
52 struct thread_info *context;
54 context = (struct thread_info *)
55 ((unsigned long)stack & (~(THREAD_SIZE - 1)));
56 bp = ops->walk_stack(context, stack, bp, ops, data, NULL, &graph);
58 stack = (unsigned long *)context->previous_esp;
59 if (!stack)
60 break;
61 if (ops->stack(data, "IRQ") < 0)
62 break;
63 touch_nmi_watchdog();
66 EXPORT_SYMBOL(dump_trace);
68 void
69 show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
70 unsigned long *sp, unsigned long bp, char *log_lvl)
72 unsigned long *stack;
73 int i;
75 if (sp == NULL) {
76 if (task)
77 sp = (unsigned long *)task->thread.sp;
78 else
79 sp = (unsigned long *)&sp;
82 stack = sp;
83 for (i = 0; i < kstack_depth_to_print; i++) {
84 if (kstack_end(stack))
85 break;
86 if (i && ((i % STACKSLOTS_PER_LINE) == 0))
87 printk("\n%s", log_lvl);
88 printk(" %08lx", *stack++);
89 touch_nmi_watchdog();
91 printk("\n");
92 show_trace_log_lvl(task, regs, sp, bp, log_lvl);
96 void show_registers(struct pt_regs *regs)
98 int i;
100 print_modules();
101 __show_regs(regs, 0);
103 printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)\n",
104 TASK_COMM_LEN, current->comm, task_pid_nr(current),
105 current_thread_info(), current, task_thread_info(current));
107 * When in-kernel, we also print out the stack and code at the
108 * time of the fault..
110 if (!user_mode_vm(regs)) {
111 unsigned int code_prologue = code_bytes * 43 / 64;
112 unsigned int code_len = code_bytes;
113 unsigned char c;
114 u8 *ip;
116 printk(KERN_EMERG "Stack:\n");
117 show_stack_log_lvl(NULL, regs, &regs->sp,
118 0, KERN_EMERG);
120 printk(KERN_EMERG "Code: ");
122 ip = (u8 *)regs->ip - code_prologue;
123 if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
124 /* try starting at IP */
125 ip = (u8 *)regs->ip;
126 code_len = code_len - code_prologue + 1;
128 for (i = 0; i < code_len; i++, ip++) {
129 if (ip < (u8 *)PAGE_OFFSET ||
130 probe_kernel_address(ip, c)) {
131 printk(" Bad EIP value.");
132 break;
134 if (ip == (u8 *)regs->ip)
135 printk("<%02x> ", c);
136 else
137 printk("%02x ", c);
140 printk("\n");
143 int is_valid_bugaddr(unsigned long ip)
145 unsigned short ud2;
147 if (ip < PAGE_OFFSET)
148 return 0;
149 if (probe_kernel_address((unsigned short *)ip, ud2))
150 return 0;
152 return ud2 == 0x0b0f;