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883251dd YS |
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 | * Probable 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> | |
b17b0153 | 19 | #include <linux/sched/debug.h> |
589ee628 | 20 | #include <linux/mm_types.h> |
883251dd YS |
21 | #include <linux/kernel.h> |
22 | #include <linux/errno.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/bug.h> | |
26 | ||
27 | #include <asm/irq.h> | |
28 | #include <asm/traps.h> | |
29 | #include <asm/page.h> | |
30 | ||
31 | static DEFINE_SPINLOCK(die_lock); | |
32 | ||
33 | /* | |
34 | * this must be called very early as the kernel might | |
35 | * use some instruction that are emulated on the 060 | |
36 | */ | |
37 | ||
38 | void __init base_trap_init(void) | |
39 | { | |
40 | } | |
41 | ||
42 | void __init trap_init(void) | |
43 | { | |
44 | } | |
45 | ||
46 | asmlinkage void set_esp0(unsigned long ssp) | |
47 | { | |
48 | current->thread.esp0 = ssp; | |
49 | } | |
50 | ||
51 | /* | |
52 | * Generic dumping code. Used for panic and debug. | |
53 | */ | |
54 | ||
55 | static void dump(struct pt_regs *fp) | |
56 | { | |
57 | unsigned long *sp; | |
58 | unsigned char *tp; | |
59 | int i; | |
60 | ||
61 | pr_info("\nCURRENT PROCESS:\n\n"); | |
62 | pr_info("COMM=%s PID=%d\n", current->comm, current->pid); | |
63 | if (current->mm) { | |
64 | pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n", | |
65 | (int) current->mm->start_code, | |
66 | (int) current->mm->end_code, | |
67 | (int) current->mm->start_data, | |
68 | (int) current->mm->end_data, | |
69 | (int) current->mm->end_data, | |
70 | (int) current->mm->brk); | |
71 | pr_info("USER-STACK=%08x KERNEL-STACK=%08lx\n\n", | |
72 | (int) current->mm->start_stack, | |
73 | (int) PAGE_SIZE+(unsigned long)current); | |
74 | } | |
75 | ||
76 | show_regs(fp); | |
77 | pr_info("\nCODE:"); | |
78 | tp = ((unsigned char *) fp->pc) - 0x20; | |
79 | for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) { | |
80 | if ((i % 0x10) == 0) | |
81 | pr_info("\n%08x: ", (int) (tp + i)); | |
82 | pr_info("%08x ", (int) *sp++); | |
83 | } | |
84 | pr_info("\n"); | |
85 | ||
86 | pr_info("\nKERNEL STACK:"); | |
87 | tp = ((unsigned char *) fp) - 0x40; | |
88 | for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) { | |
89 | if ((i % 0x10) == 0) | |
90 | pr_info("\n%08x: ", (int) (tp + i)); | |
91 | pr_info("%08x ", (int) *sp++); | |
92 | } | |
93 | pr_info("\n"); | |
94 | if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE)) | |
95 | pr_info("(Possibly corrupted stack page??)\n"); | |
96 | ||
97 | pr_info("\n\n"); | |
98 | } | |
99 | ||
100 | void die(const char *str, struct pt_regs *fp, unsigned long err) | |
101 | { | |
102 | static int diecount; | |
103 | ||
104 | oops_enter(); | |
105 | ||
106 | console_verbose(); | |
107 | spin_lock_irq(&die_lock); | |
108 | report_bug(fp->pc, fp); | |
109 | pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount); | |
110 | dump(fp); | |
111 | ||
112 | spin_unlock_irq(&die_lock); | |
113 | do_exit(SIGSEGV); | |
114 | } | |
115 | ||
116 | static int kstack_depth_to_print = 24; | |
117 | ||
9cb8f069 | 118 | void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl) |
883251dd YS |
119 | { |
120 | unsigned long *stack, addr; | |
121 | int i; | |
122 | ||
123 | if (esp == NULL) | |
124 | esp = (unsigned long *) &esp; | |
125 | ||
126 | stack = esp; | |
127 | ||
0b2ad0c7 | 128 | printk("%sStack from %08lx:", loglvl, (unsigned long)stack); |
883251dd | 129 | for (i = 0; i < kstack_depth_to_print; i++) { |
bf24eec3 YS |
130 | if (((unsigned long)stack & (THREAD_SIZE - 1)) >= |
131 | THREAD_SIZE-4) | |
883251dd YS |
132 | break; |
133 | if (i % 8 == 0) | |
0b2ad0c7 | 134 | printk("%s ", loglvl); |
bf24eec3 | 135 | pr_cont(" %08lx", *stack++); |
883251dd YS |
136 | } |
137 | ||
0b2ad0c7 | 138 | printk("%s\nCall Trace:\n", loglvl); |
883251dd YS |
139 | i = 0; |
140 | stack = esp; | |
bf24eec3 | 141 | while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) { |
883251dd YS |
142 | addr = *stack++; |
143 | /* | |
144 | * If the address is either in the text segment of the | |
145 | * kernel, or in the region which contains vmalloc'ed | |
146 | * memory, it *may* be the address of a calling | |
147 | * routine; if so, print it so that someone tracing | |
148 | * down the cause of the crash will be able to figure | |
149 | * out the call path that was taken. | |
150 | */ | |
151 | if (check_kernel_text(addr)) { | |
152 | if (i % 4 == 0) | |
0b2ad0c7 | 153 | printk("%s ", loglvl); |
bf24eec3 | 154 | pr_cont(" [<%08lx>]", addr); |
883251dd YS |
155 | i++; |
156 | } | |
157 | } | |
0b2ad0c7 DS |
158 | printk("%s\n", loglvl); |
159 | } |