4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
8 * Modifications for the OpenRISC architecture:
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
17 * Here we handle the break vectors not used by the system call
18 * mechanism, as well as some general stack/register dumping
23 #include <linux/init.h>
24 #include <linux/sched.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/kmod.h>
28 #include <linux/string.h>
29 #include <linux/errno.h>
30 #include <linux/ptrace.h>
31 #include <linux/timer.h>
33 #include <linux/kallsyms.h>
34 #include <asm/uaccess.h>
36 #include <asm/segment.h>
38 #include <asm/pgtable.h>
40 extern char _etext, _stext;
42 int kstack_depth_to_print = 0x180;
44 static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
46 return p > (void *)tinfo && p < (void *)tinfo + THREAD_SIZE - 3;
49 void show_trace(struct task_struct *task, unsigned long *stack)
51 struct thread_info *context;
54 context = (struct thread_info *)
55 ((unsigned long)stack & (~(THREAD_SIZE - 1)));
57 while (valid_stack_ptr(context, stack)) {
59 if (__kernel_text_address(addr)) {
60 printk(" [<%08lx>]", addr);
61 print_symbol(" %s", addr);
65 printk(" =======================\n");
68 /* displays a short stack trace */
69 void show_stack(struct task_struct *task, unsigned long *esp)
71 unsigned long addr, *stack;
75 esp = (unsigned long *)&esp;
79 printk("Stack dump [0x%08lx]:\n", (unsigned long)esp);
80 for (i = 0; i < kstack_depth_to_print; i++) {
81 if (kstack_end(stack))
83 if (__get_user(addr, stack)) {
84 /* This message matches "failing address" marked
85 s390 in ksymoops, so lines containing it will
86 not be filtered out by ksymoops. */
87 printk("Failing address 0x%lx\n", (unsigned long)stack);
92 printk("sp + %02d: 0x%08lx\n", i * 4, addr);
96 show_trace(task, esp);
101 void show_trace_task(struct task_struct *tsk)
104 * TODO: SysRq-T trace dump...
108 void show_registers(struct pt_regs *regs)
114 esp = (unsigned long)(®s->sp);
119 " PC: %08lx SR: %08lx SP: %08lx\n",
120 smp_processor_id(), regs->pc, regs->sr, regs->sp);
121 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
122 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
123 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
124 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
125 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
126 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
127 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
128 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
129 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
130 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
131 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
132 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
133 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
134 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
135 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
136 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
137 printk(" RES: %08lx oGPR11: %08lx\n",
138 regs->gpr[11], regs->orig_gpr11);
140 printk("Process %s (pid: %d, stackpage=%08lx)\n",
141 current->comm, current->pid, (unsigned long)current);
143 * When in-kernel, we also print out the stack and code at the
144 * time of the fault..
149 show_stack(NULL, (unsigned long *)esp);
152 if (regs->pc < PAGE_OFFSET)
155 for (i = -24; i < 24; i++) {
157 if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
159 printk(" Bad PC value.");
164 printk("(%02x) ", c);
172 void nommu_dump_state(struct pt_regs *regs,
173 unsigned long ea, unsigned long vector)
176 unsigned long addr, stack = regs->sp;
178 printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
181 " PC: %08lx SR: %08lx SP: %08lx\n",
182 0, regs->pc, regs->sr, regs->sp);
183 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
184 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
185 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
186 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
187 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
188 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
189 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
190 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
191 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
192 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
193 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
194 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
195 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
196 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
197 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
198 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
199 printk(" RES: %08lx oGPR11: %08lx\n",
200 regs->gpr[11], regs->orig_gpr11);
202 printk("Process %s (pid: %d, stackpage=%08lx)\n",
203 ((struct task_struct *)(__pa(current)))->comm,
204 ((struct task_struct *)(__pa(current)))->pid,
205 (unsigned long)current);
208 printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
209 for (i = 0; i < kstack_depth_to_print; i++) {
210 if (((long)stack & (THREAD_SIZE - 1)) == 0)
214 printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
215 *((unsigned long *)(__pa(stack))));
219 printk("Call Trace: ");
221 while (((long)stack & (THREAD_SIZE - 1)) != 0) {
222 addr = *((unsigned long *)__pa(stack));
225 if (kernel_text_address(addr)) {
226 if (i && ((i % 6) == 0))
228 printk(" [<%08lx>]", addr);
236 for (i = -24; i < 24; i++) {
238 c = ((unsigned char *)(__pa(regs->pc)))[i];
241 printk("(%02x) ", c);
248 /* This is normally the 'Oops' routine */
249 void die(const char *str, struct pt_regs *regs, long err)
253 printk("\n%s#: %04lx\n", str, err & 0xffff);
254 show_registers(regs);
255 #ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
256 printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");
258 /* shut down interrupts */
261 __asm__ __volatile__("l.nop 1");
267 /* This is normally the 'Oops' routine */
268 void die_if_kernel(const char *str, struct pt_regs *regs, long err)
276 void unhandled_exception(struct pt_regs *regs, int ea, int vector)
278 printk("Unable to handle exception at EA =0x%x, vector 0x%x",
280 die("Oops", regs, 9);
283 void __init trap_init(void)
285 /* Nothing needs to be done */
288 asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
291 memset(&info, 0, sizeof(info));
292 info.si_signo = SIGTRAP;
293 info.si_code = TRAP_TRACE;
294 info.si_addr = (void *)address;
295 force_sig_info(SIGTRAP, &info, current);
300 asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
304 if (user_mode(regs)) {
306 info.si_signo = SIGSEGV;
308 /* info.si_code has been set above */
309 info.si_addr = (void *)address;
310 force_sig_info(SIGSEGV, &info, current);
312 printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
313 show_registers(regs);
314 die("Die:", regs, address);
319 asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
323 if (user_mode(regs)) {
325 info.si_signo = SIGBUS;
327 info.si_code = BUS_ADRERR;
328 info.si_addr = (void *)address;
329 force_sig_info(SIGBUS, &info, current);
330 } else { /* Kernel mode */
331 printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
332 show_registers(regs);
333 die("Die:", regs, address);
337 asmlinkage void do_illegal_instruction(struct pt_regs *regs,
338 unsigned long address)
342 if (user_mode(regs)) {
344 info.si_signo = SIGILL;
346 info.si_code = ILL_ILLOPC;
347 info.si_addr = (void *)address;
348 force_sig_info(SIGBUS, &info, current);
349 } else { /* Kernel mode */
350 printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
352 show_registers(regs);
353 die("Die:", regs, address);