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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2001 - 2003 Jeff Dike (jdike@addtoit.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
6 | #include "linux/kernel.h" | |
7 | #include "linux/smp.h" | |
8 | #include "linux/sched.h" | |
b3461034 | 9 | #include "linux/kallsyms.h" |
1da177e4 LT |
10 | #include "asm/ptrace.h" |
11 | #include "sysrq.h" | |
12 | ||
b3461034 | 13 | /* This is declared by <linux/sched.h> */ |
1da177e4 LT |
14 | void show_regs(struct pt_regs *regs) |
15 | { | |
16 | printk("\n"); | |
17 | printk("EIP: %04lx:[<%08lx>] CPU: %d %s", | |
18 | 0xffff & PT_REGS_CS(regs), PT_REGS_IP(regs), | |
19 | smp_processor_id(), print_tainted()); | |
20 | if (PT_REGS_CS(regs) & 3) | |
21 | printk(" ESP: %04lx:%08lx", 0xffff & PT_REGS_SS(regs), | |
22 | PT_REGS_SP(regs)); | |
23 | printk(" EFLAGS: %08lx\n %s\n", PT_REGS_EFLAGS(regs), | |
24 | print_tainted()); | |
25 | printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n", | |
26 | PT_REGS_EAX(regs), PT_REGS_EBX(regs), | |
27 | PT_REGS_ECX(regs), | |
28 | PT_REGS_EDX(regs)); | |
29 | printk("ESI: %08lx EDI: %08lx EBP: %08lx", | |
30 | PT_REGS_ESI(regs), PT_REGS_EDI(regs), | |
31 | PT_REGS_EBP(regs)); | |
32 | printk(" DS: %04lx ES: %04lx\n", | |
33 | 0xffff & PT_REGS_DS(regs), | |
34 | 0xffff & PT_REGS_ES(regs)); | |
35 | ||
b3461034 | 36 | show_trace(NULL, (unsigned long *) ®s); |
1da177e4 | 37 | } |
b3461034 PBG |
38 | |
39 | /* Copied from i386. */ | |
40 | static inline int valid_stack_ptr(struct thread_info *tinfo, void *p) | |
41 | { | |
42 | return p > (void *)tinfo && | |
43 | p < (void *)tinfo + THREAD_SIZE - 3; | |
44 | } | |
45 | ||
46 | /* Adapted from i386 (we also print the address we read from). */ | |
47 | static inline unsigned long print_context_stack(struct thread_info *tinfo, | |
48 | unsigned long *stack, unsigned long ebp) | |
49 | { | |
50 | unsigned long addr; | |
51 | ||
52 | #ifdef CONFIG_FRAME_POINTER | |
53 | while (valid_stack_ptr(tinfo, (void *)ebp)) { | |
54 | addr = *(unsigned long *)(ebp + 4); | |
55 | printk("%08lx: [<%08lx>]", ebp + 4, addr); | |
56 | print_symbol(" %s", addr); | |
57 | printk("\n"); | |
58 | ebp = *(unsigned long *)ebp; | |
59 | } | |
60 | #else | |
61 | while (valid_stack_ptr(tinfo, stack)) { | |
62 | addr = *stack; | |
63 | if (__kernel_text_address(addr)) { | |
64 | printk("%08lx: [<%08lx>]", (unsigned long) stack, addr); | |
65 | print_symbol(" %s", addr); | |
66 | printk("\n"); | |
67 | } | |
68 | stack++; | |
69 | } | |
70 | #endif | |
71 | return ebp; | |
72 | } | |
73 | ||
74 | void show_trace(struct task_struct* task, unsigned long * stack) | |
75 | { | |
76 | unsigned long ebp; | |
77 | struct thread_info *context; | |
78 | ||
79 | /* Turn this into BUG_ON if possible. */ | |
80 | if (!stack) { | |
81 | stack = (unsigned long*) &stack; | |
82 | printk("show_trace: got NULL stack, implicit assumption task == current"); | |
83 | WARN_ON(1); | |
84 | } | |
85 | ||
86 | if (!task) | |
87 | task = current; | |
88 | ||
89 | if (task != current) { | |
fad1c45c | 90 | ebp = (unsigned long) KSTK_EBP(task); |
b3461034 PBG |
91 | } else { |
92 | asm ("movl %%ebp, %0" : "=r" (ebp) : ); | |
93 | } | |
94 | ||
95 | context = (struct thread_info *) | |
96 | ((unsigned long)stack & (~(THREAD_SIZE - 1))); | |
97 | print_context_stack(context, stack, ebp); | |
98 | ||
b3461034 PBG |
99 | printk("\n"); |
100 | } | |
101 |