Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/h8300/boot/traps.c -- general exception handling code | |
3 | * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp> | |
4 | * | |
5 | * Cloned from Linux/m68k. | |
6 | * | |
7 | * No original Copyright holder listed, | |
8 | * Probabily original (C) Roman Zippel (assigned DJD, 1999) | |
9 | * | |
10 | * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com> | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General Public | |
13 | * License. See the file COPYING in the main directory of this archive | |
14 | * for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/module.h> | |
23 | ||
24 | #include <asm/system.h> | |
25 | #include <asm/irq.h> | |
26 | #include <asm/traps.h> | |
27 | #include <asm/page.h> | |
28 | #include <asm/gpio.h> | |
29 | ||
30 | /* | |
31 | * this must be called very early as the kernel might | |
32 | * use some instruction that are emulated on the 060 | |
33 | */ | |
34 | ||
35 | void __init base_trap_init(void) | |
36 | { | |
37 | } | |
38 | ||
39 | void __init trap_init (void) | |
40 | { | |
41 | } | |
42 | ||
43 | asmlinkage void set_esp0 (unsigned long ssp) | |
44 | { | |
45 | current->thread.esp0 = ssp; | |
46 | } | |
47 | ||
48 | /* | |
49 | * Generic dumping code. Used for panic and debug. | |
50 | */ | |
51 | ||
52 | static void dump(struct pt_regs *fp) | |
53 | { | |
54 | unsigned long *sp; | |
55 | unsigned char *tp; | |
56 | int i; | |
57 | ||
58 | printk("\nCURRENT PROCESS:\n\n"); | |
59 | printk("COMM=%s PID=%d\n", current->comm, current->pid); | |
60 | if (current->mm) { | |
61 | printk("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", | |
62 | (int) current->mm->start_code, | |
63 | (int) current->mm->end_code, | |
64 | (int) current->mm->start_data, | |
65 | (int) current->mm->end_data, | |
66 | (int) current->mm->end_data, | |
67 | (int) current->mm->brk); | |
68 | printk("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", | |
69 | (int) current->mm->start_stack, | |
70 | (int) PAGE_SIZE+(unsigned long)current); | |
71 | } | |
72 | ||
73 | show_regs(fp); | |
74 | printk("\nCODE:"); | |
75 | tp = ((unsigned char *) fp->pc) - 0x20; | |
76 | for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { | |
77 | if ((i % 0x10) == 0) | |
78 | printk("\n%08x: ", (int) (tp + i)); | |
79 | printk("%08x ", (int) *sp++); | |
80 | } | |
81 | printk("\n"); | |
82 | ||
83 | printk("\nKERNEL STACK:"); | |
84 | tp = ((unsigned char *) fp) - 0x40; | |
85 | for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { | |
86 | if ((i % 0x10) == 0) | |
87 | printk("\n%08x: ", (int) (tp + i)); | |
88 | printk("%08x ", (int) *sp++); | |
89 | } | |
90 | printk("\n"); | |
91 | if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) | |
92 | printk("(Possibly corrupted stack page??)\n"); | |
93 | ||
94 | printk("\n\n"); | |
95 | } | |
96 | ||
97 | void die_if_kernel (char *str, struct pt_regs *fp, int nr) | |
98 | { | |
99 | extern int console_loglevel; | |
100 | ||
101 | if (!(fp->ccr & PS_S)) | |
102 | return; | |
103 | ||
104 | console_loglevel = 15; | |
105 | dump(fp); | |
106 | ||
107 | do_exit(SIGSEGV); | |
108 | } | |
109 | ||
110 | extern char _start, _etext; | |
111 | #define check_kernel_text(addr) \ | |
112 | ((addr >= (unsigned long)(&_start)) && \ | |
113 | (addr < (unsigned long)(&_etext))) | |
114 | ||
115 | static int kstack_depth_to_print = 24; | |
116 | ||
117 | void show_stack(struct task_struct *task, unsigned long *esp) | |
118 | { | |
119 | unsigned long *stack, addr; | |
120 | int i; | |
121 | ||
122 | if (esp == NULL) | |
123 | esp = (unsigned long *) &esp; | |
124 | ||
125 | stack = esp; | |
126 | ||
127 | printk("Stack from %08lx:", (unsigned long)stack); | |
128 | for (i = 0; i < kstack_depth_to_print; i++) { | |
129 | if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) | |
130 | break; | |
131 | if (i % 8 == 0) | |
132 | printk("\n "); | |
133 | printk(" %08lx", *stack++); | |
134 | } | |
135 | ||
136 | printk("\nCall Trace:"); | |
137 | i = 0; | |
138 | stack = esp; | |
139 | while (((unsigned long)stack & (THREAD_SIZE - 1)) == 0) { | |
140 | addr = *stack++; | |
141 | /* | |
142 | * If the address is either in the text segment of the | |
143 | * kernel, or in the region which contains vmalloc'ed | |
144 | * memory, it *may* be the address of a calling | |
145 | * routine; if so, print it so that someone tracing | |
146 | * down the cause of the crash will be able to figure | |
147 | * out the call path that was taken. | |
148 | */ | |
149 | if (check_kernel_text(addr)) { | |
150 | if (i % 4 == 0) | |
151 | printk("\n "); | |
152 | printk(" [<%08lx>]", addr); | |
153 | i++; | |
154 | } | |
155 | } | |
156 | printk("\n"); | |
157 | } | |
158 | ||
159 | void show_trace_task(struct task_struct *tsk) | |
160 | { | |
161 | show_stack(tsk,(unsigned long *)tsk->thread.esp0); | |
162 | } | |
163 | ||
164 | void dump_stack(void) | |
165 | { | |
166 | show_stack(NULL,NULL); | |
167 | } | |
168 | ||
169 | EXPORT_SYMBOL(dump_stack); |