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1/*
2 * OpenRISC traps.c
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * Modifications for the OpenRISC architecture:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 *
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.
16 *
17 * Here we handle the break vectors not used by the system call
18 * mechanism, as well as some general stack/register dumping
19 * things.
20 *
21 */
22
23#include <linux/init.h>
24#include <linux/sched.h>
25#include <linux/sched/debug.h>
26#include <linux/sched/task_stack.h>
27#include <linux/kernel.h>
28#include <linux/extable.h>
29#include <linux/kmod.h>
30#include <linux/string.h>
31#include <linux/errno.h>
32#include <linux/ptrace.h>
33#include <linux/timer.h>
34#include <linux/mm.h>
35#include <linux/kallsyms.h>
36#include <linux/uaccess.h>
37
38#include <asm/segment.h>
39#include <asm/io.h>
40#include <asm/pgtable.h>
41#include <asm/unwinder.h>
42#include <asm/sections.h>
43
44int kstack_depth_to_print = 0x180;
45int lwa_flag;
46unsigned long __user *lwa_addr;
47
48void print_trace(void *data, unsigned long addr, int reliable)
49{
50 pr_emerg("[<%p>] %s%pS\n", (void *) addr, reliable ? "" : "? ",
51 (void *) addr);
52}
53
54/* displays a short stack trace */
55void show_stack(struct task_struct *task, unsigned long *esp)
56{
57 if (esp == NULL)
58 esp = (unsigned long *)&esp;
59
60 pr_emerg("Call trace:\n");
61 unwind_stack(NULL, esp, print_trace);
62}
63
64void show_trace_task(struct task_struct *tsk)
65{
66 /*
67 * TODO: SysRq-T trace dump...
68 */
69}
70
71void show_registers(struct pt_regs *regs)
72{
73 int i;
74 int in_kernel = 1;
75 unsigned long esp;
76
77 esp = (unsigned long)(regs->sp);
78 if (user_mode(regs))
79 in_kernel = 0;
80
81 printk("CPU #: %d\n"
82 " PC: %08lx SR: %08lx SP: %08lx\n",
83 smp_processor_id(), regs->pc, regs->sr, regs->sp);
84 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
85 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
86 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
87 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
88 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
89 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
90 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
91 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
92 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
93 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
94 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
95 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
96 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
97 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
98 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
99 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
100 printk(" RES: %08lx oGPR11: %08lx\n",
101 regs->gpr[11], regs->orig_gpr11);
102
103 printk("Process %s (pid: %d, stackpage=%08lx)\n",
104 current->comm, current->pid, (unsigned long)current);
105 /*
106 * When in-kernel, we also print out the stack and code at the
107 * time of the fault..
108 */
109 if (in_kernel) {
110
111 printk("\nStack: ");
112 show_stack(NULL, (unsigned long *)esp);
113
114 printk("\nCode: ");
115 if (regs->pc < PAGE_OFFSET)
116 goto bad;
117
118 for (i = -24; i < 24; i++) {
119 unsigned char c;
120 if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
121bad:
122 printk(" Bad PC value.");
123 break;
124 }
125
126 if (i == 0)
127 printk("(%02x) ", c);
128 else
129 printk("%02x ", c);
130 }
131 }
132 printk("\n");
133}
134
135void nommu_dump_state(struct pt_regs *regs,
136 unsigned long ea, unsigned long vector)
137{
138 int i;
139 unsigned long addr, stack = regs->sp;
140
141 printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
142
143 printk("CPU #: %d\n"
144 " PC: %08lx SR: %08lx SP: %08lx\n",
145 0, regs->pc, regs->sr, regs->sp);
146 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
147 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
148 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
149 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
150 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
151 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
152 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
153 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
154 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
155 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
156 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
157 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
158 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
159 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
160 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
161 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
162 printk(" RES: %08lx oGPR11: %08lx\n",
163 regs->gpr[11], regs->orig_gpr11);
164
165 printk("Process %s (pid: %d, stackpage=%08lx)\n",
166 ((struct task_struct *)(__pa(current)))->comm,
167 ((struct task_struct *)(__pa(current)))->pid,
168 (unsigned long)current);
169
170 printk("\nStack: ");
171 printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
172 for (i = 0; i < kstack_depth_to_print; i++) {
173 if (((long)stack & (THREAD_SIZE - 1)) == 0)
174 break;
175 stack++;
176
177 printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
178 *((unsigned long *)(__pa(stack))));
179 }
180 printk("\n");
181
182 printk("Call Trace: ");
183 i = 1;
184 while (((long)stack & (THREAD_SIZE - 1)) != 0) {
185 addr = *((unsigned long *)__pa(stack));
186 stack++;
187
188 if (kernel_text_address(addr)) {
189 if (i && ((i % 6) == 0))
190 printk("\n ");
191 printk(" [<%08lx>]", addr);
192 i++;
193 }
194 }
195 printk("\n");
196
197 printk("\nCode: ");
198
199 for (i = -24; i < 24; i++) {
200 unsigned char c;
201 c = ((unsigned char *)(__pa(regs->pc)))[i];
202
203 if (i == 0)
204 printk("(%02x) ", c);
205 else
206 printk("%02x ", c);
207 }
208 printk("\n");
209}
210
211/* This is normally the 'Oops' routine */
212void die(const char *str, struct pt_regs *regs, long err)
213{
214
215 console_verbose();
216 printk("\n%s#: %04lx\n", str, err & 0xffff);
217 show_registers(regs);
218#ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
219 printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");
220
221 /* shut down interrupts */
222 local_irq_disable();
223
224 __asm__ __volatile__("l.nop 1");
225 do {} while (1);
226#endif
227 do_exit(SIGSEGV);
228}
229
230/* This is normally the 'Oops' routine */
231void die_if_kernel(const char *str, struct pt_regs *regs, long err)
232{
233 if (user_mode(regs))
234 return;
235
236 die(str, regs, err);
237}
238
239void unhandled_exception(struct pt_regs *regs, int ea, int vector)
240{
241 printk("Unable to handle exception at EA =0x%x, vector 0x%x",
242 ea, vector);
243 die("Oops", regs, 9);
244}
245
246void __init trap_init(void)
247{
248 /* Nothing needs to be done */
249}
250
251asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
252{
253 siginfo_t info;
254 memset(&info, 0, sizeof(info));
255 info.si_signo = SIGTRAP;
256 info.si_code = TRAP_TRACE;
257 info.si_addr = (void *)address;
258 force_sig_info(SIGTRAP, &info, current);
259
260 regs->pc += 4;
261}
262
263asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
264{
265 siginfo_t info;
266
267 if (user_mode(regs)) {
268 /* Send a SIGBUS */
269 info.si_signo = SIGBUS;
270 info.si_errno = 0;
271 info.si_code = BUS_ADRALN;
272 info.si_addr = (void __user *)address;
273 force_sig_info(SIGBUS, &info, current);
274 } else {
275 printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
276 show_registers(regs);
277 die("Die:", regs, address);
278 }
279
280}
281
282asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
283{
284 siginfo_t info;
285
286 if (user_mode(regs)) {
287 /* Send a SIGBUS */
288 info.si_signo = SIGBUS;
289 info.si_errno = 0;
290 info.si_code = BUS_ADRERR;
291 info.si_addr = (void *)address;
292 force_sig_info(SIGBUS, &info, current);
293 } else { /* Kernel mode */
294 printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
295 show_registers(regs);
296 die("Die:", regs, address);
297 }
298}
299
300static inline int in_delay_slot(struct pt_regs *regs)
301{
302#ifdef CONFIG_OPENRISC_NO_SPR_SR_DSX
303 /* No delay slot flag, do the old way */
304 unsigned int op, insn;
305
306 insn = *((unsigned int *)regs->pc);
307 op = insn >> 26;
308 switch (op) {
309 case 0x00: /* l.j */
310 case 0x01: /* l.jal */
311 case 0x03: /* l.bnf */
312 case 0x04: /* l.bf */
313 case 0x11: /* l.jr */
314 case 0x12: /* l.jalr */
315 return 1;
316 default:
317 return 0;
318 }
319#else
320 return regs->sr & SPR_SR_DSX;
321#endif
322}
323
324static inline void adjust_pc(struct pt_regs *regs, unsigned long address)
325{
326 int displacement;
327 unsigned int rb, op, jmp;
328
329 if (unlikely(in_delay_slot(regs))) {
330 /* In delay slot, instruction at pc is a branch, simulate it */
331 jmp = *((unsigned int *)regs->pc);
332
333 displacement = sign_extend32(((jmp) & 0x3ffffff) << 2, 27);
334 rb = (jmp & 0x0000ffff) >> 11;
335 op = jmp >> 26;
336
337 switch (op) {
338 case 0x00: /* l.j */
339 regs->pc += displacement;
340 return;
341 case 0x01: /* l.jal */
342 regs->pc += displacement;
343 regs->gpr[9] = regs->pc + 8;
344 return;
345 case 0x03: /* l.bnf */
346 if (regs->sr & SPR_SR_F)
347 regs->pc += 8;
348 else
349 regs->pc += displacement;
350 return;
351 case 0x04: /* l.bf */
352 if (regs->sr & SPR_SR_F)
353 regs->pc += displacement;
354 else
355 regs->pc += 8;
356 return;
357 case 0x11: /* l.jr */
358 regs->pc = regs->gpr[rb];
359 return;
360 case 0x12: /* l.jalr */
361 regs->pc = regs->gpr[rb];
362 regs->gpr[9] = regs->pc + 8;
363 return;
364 default:
365 break;
366 }
367 } else {
368 regs->pc += 4;
369 }
370}
371
372static inline void simulate_lwa(struct pt_regs *regs, unsigned long address,
373 unsigned int insn)
374{
375 unsigned int ra, rd;
376 unsigned long value;
377 unsigned long orig_pc;
378 long imm;
379
380 const struct exception_table_entry *entry;
381
382 orig_pc = regs->pc;
383 adjust_pc(regs, address);
384
385 ra = (insn >> 16) & 0x1f;
386 rd = (insn >> 21) & 0x1f;
387 imm = (short)insn;
388 lwa_addr = (unsigned long __user *)(regs->gpr[ra] + imm);
389
390 if ((unsigned long)lwa_addr & 0x3) {
391 do_unaligned_access(regs, address);
392 return;
393 }
394
395 if (get_user(value, lwa_addr)) {
396 if (user_mode(regs)) {
397 force_sig(SIGSEGV, current);
398 return;
399 }
400
401 if ((entry = search_exception_tables(orig_pc))) {
402 regs->pc = entry->fixup;
403 return;
404 }
405
406 /* kernel access in kernel space, load it directly */
407 value = *((unsigned long *)lwa_addr);
408 }
409
410 lwa_flag = 1;
411 regs->gpr[rd] = value;
412}
413
414static inline void simulate_swa(struct pt_regs *regs, unsigned long address,
415 unsigned int insn)
416{
417 unsigned long __user *vaddr;
418 unsigned long orig_pc;
419 unsigned int ra, rb;
420 long imm;
421
422 const struct exception_table_entry *entry;
423
424 orig_pc = regs->pc;
425 adjust_pc(regs, address);
426
427 ra = (insn >> 16) & 0x1f;
428 rb = (insn >> 11) & 0x1f;
429 imm = (short)(((insn & 0x2200000) >> 10) | (insn & 0x7ff));
430 vaddr = (unsigned long __user *)(regs->gpr[ra] + imm);
431
432 if (!lwa_flag || vaddr != lwa_addr) {
433 regs->sr &= ~SPR_SR_F;
434 return;
435 }
436
437 if ((unsigned long)vaddr & 0x3) {
438 do_unaligned_access(regs, address);
439 return;
440 }
441
442 if (put_user(regs->gpr[rb], vaddr)) {
443 if (user_mode(regs)) {
444 force_sig(SIGSEGV, current);
445 return;
446 }
447
448 if ((entry = search_exception_tables(orig_pc))) {
449 regs->pc = entry->fixup;
450 return;
451 }
452
453 /* kernel access in kernel space, store it directly */
454 *((unsigned long *)vaddr) = regs->gpr[rb];
455 }
456
457 lwa_flag = 0;
458 regs->sr |= SPR_SR_F;
459}
460
461#define INSN_LWA 0x1b
462#define INSN_SWA 0x33
463
464asmlinkage void do_illegal_instruction(struct pt_regs *regs,
465 unsigned long address)
466{
467 siginfo_t info;
468 unsigned int op;
469 unsigned int insn = *((unsigned int *)address);
470
471 op = insn >> 26;
472
473 switch (op) {
474 case INSN_LWA:
475 simulate_lwa(regs, address, insn);
476 return;
477
478 case INSN_SWA:
479 simulate_swa(regs, address, insn);
480 return;
481
482 default:
483 break;
484 }
485
486 if (user_mode(regs)) {
487 /* Send a SIGILL */
488 info.si_signo = SIGILL;
489 info.si_errno = 0;
490 info.si_code = ILL_ILLOPC;
491 info.si_addr = (void *)address;
492 force_sig_info(SIGBUS, &info, current);
493 } else { /* Kernel mode */
494 printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
495 address);
496 show_registers(regs);
497 die("Die:", regs, address);
498 }
499}
1/*
2 * OpenRISC traps.c
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * Modifications for the OpenRISC architecture:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 *
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.
16 *
17 * Here we handle the break vectors not used by the system call
18 * mechanism, as well as some general stack/register dumping
19 * things.
20 *
21 */
22
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>
32#include <linux/mm.h>
33#include <linux/kallsyms.h>
34#include <asm/uaccess.h>
35
36#include <asm/segment.h>
37#include <asm/io.h>
38#include <asm/pgtable.h>
39
40extern char _etext, _stext;
41
42int kstack_depth_to_print = 0x180;
43
44static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
45{
46 return p > (void *)tinfo && p < (void *)tinfo + THREAD_SIZE - 3;
47}
48
49void show_trace(struct task_struct *task, unsigned long *stack)
50{
51 struct thread_info *context;
52 unsigned long addr;
53
54 context = (struct thread_info *)
55 ((unsigned long)stack & (~(THREAD_SIZE - 1)));
56
57 while (valid_stack_ptr(context, stack)) {
58 addr = *stack++;
59 if (__kernel_text_address(addr)) {
60 printk(" [<%08lx>]", addr);
61 print_symbol(" %s", addr);
62 printk("\n");
63 }
64 }
65 printk(" =======================\n");
66}
67
68/* displays a short stack trace */
69void show_stack(struct task_struct *task, unsigned long *esp)
70{
71 unsigned long addr, *stack;
72 int i;
73
74 if (esp == NULL)
75 esp = (unsigned long *)&esp;
76
77 stack = esp;
78
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))
82 break;
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);
88 break;
89 }
90 stack++;
91
92 printk("sp + %02d: 0x%08lx\n", i * 4, addr);
93 }
94 printk("\n");
95
96 show_trace(task, esp);
97
98 return;
99}
100
101void show_trace_task(struct task_struct *tsk)
102{
103 /*
104 * TODO: SysRq-T trace dump...
105 */
106}
107
108void show_registers(struct pt_regs *regs)
109{
110 int i;
111 int in_kernel = 1;
112 unsigned long esp;
113
114 esp = (unsigned long)(®s->sp);
115 if (user_mode(regs))
116 in_kernel = 0;
117
118 printk("CPU #: %d\n"
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);
139
140 printk("Process %s (pid: %d, stackpage=%08lx)\n",
141 current->comm, current->pid, (unsigned long)current);
142 /*
143 * When in-kernel, we also print out the stack and code at the
144 * time of the fault..
145 */
146 if (in_kernel) {
147
148 printk("\nStack: ");
149 show_stack(NULL, (unsigned long *)esp);
150
151 printk("\nCode: ");
152 if (regs->pc < PAGE_OFFSET)
153 goto bad;
154
155 for (i = -24; i < 24; i++) {
156 unsigned char c;
157 if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
158bad:
159 printk(" Bad PC value.");
160 break;
161 }
162
163 if (i == 0)
164 printk("(%02x) ", c);
165 else
166 printk("%02x ", c);
167 }
168 }
169 printk("\n");
170}
171
172void nommu_dump_state(struct pt_regs *regs,
173 unsigned long ea, unsigned long vector)
174{
175 int i;
176 unsigned long addr, stack = regs->sp;
177
178 printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
179
180 printk("CPU #: %d\n"
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);
201
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);
206
207 printk("\nStack: ");
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)
211 break;
212 stack++;
213
214 printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
215 *((unsigned long *)(__pa(stack))));
216 }
217 printk("\n");
218
219 printk("Call Trace: ");
220 i = 1;
221 while (((long)stack & (THREAD_SIZE - 1)) != 0) {
222 addr = *((unsigned long *)__pa(stack));
223 stack++;
224
225 if (kernel_text_address(addr)) {
226 if (i && ((i % 6) == 0))
227 printk("\n ");
228 printk(" [<%08lx>]", addr);
229 i++;
230 }
231 }
232 printk("\n");
233
234 printk("\nCode: ");
235
236 for (i = -24; i < 24; i++) {
237 unsigned char c;
238 c = ((unsigned char *)(__pa(regs->pc)))[i];
239
240 if (i == 0)
241 printk("(%02x) ", c);
242 else
243 printk("%02x ", c);
244 }
245 printk("\n");
246}
247
248/* This is normally the 'Oops' routine */
249void die(const char *str, struct pt_regs *regs, long err)
250{
251
252 console_verbose();
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");
257
258 /* shut down interrupts */
259 local_irq_disable();
260
261 __asm__ __volatile__("l.nop 1");
262 do {} while (1);
263#endif
264 do_exit(SIGSEGV);
265}
266
267/* This is normally the 'Oops' routine */
268void die_if_kernel(const char *str, struct pt_regs *regs, long err)
269{
270 if (user_mode(regs))
271 return;
272
273 die(str, regs, err);
274}
275
276void unhandled_exception(struct pt_regs *regs, int ea, int vector)
277{
278 printk("Unable to handle exception at EA =0x%x, vector 0x%x",
279 ea, vector);
280 die("Oops", regs, 9);
281}
282
283void __init trap_init(void)
284{
285 /* Nothing needs to be done */
286}
287
288asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
289{
290 siginfo_t info;
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);
296
297 regs->pc += 4;
298}
299
300asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
301{
302 siginfo_t info;
303
304 if (user_mode(regs)) {
305 /* Send a SIGSEGV */
306 info.si_signo = SIGSEGV;
307 info.si_errno = 0;
308 /* info.si_code has been set above */
309 info.si_addr = (void *)address;
310 force_sig_info(SIGSEGV, &info, current);
311 } else {
312 printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
313 show_registers(regs);
314 die("Die:", regs, address);
315 }
316
317}
318
319asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
320{
321 siginfo_t info;
322
323 if (user_mode(regs)) {
324 /* Send a SIGBUS */
325 info.si_signo = SIGBUS;
326 info.si_errno = 0;
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);
334 }
335}
336
337asmlinkage void do_illegal_instruction(struct pt_regs *regs,
338 unsigned long address)
339{
340 siginfo_t info;
341
342 if (user_mode(regs)) {
343 /* Send a SIGILL */
344 info.si_signo = SIGILL;
345 info.si_errno = 0;
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",
351 address);
352 show_registers(regs);
353 die("Die:", regs, address);
354 }
355}