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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * OpenRISC traps.c
4 *
5 * Linux architectural port borrowing liberally from similar works of
6 * others. All original copyrights apply as per the original source
7 * declaration.
8 *
9 * Modifications for the OpenRISC architecture:
10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12 *
13 * Here we handle the break vectors not used by the system call
14 * mechanism, as well as some general stack/register dumping
15 * things.
16 */
17
18#include <linux/init.h>
19#include <linux/sched.h>
20#include <linux/sched/debug.h>
21#include <linux/sched/task_stack.h>
22#include <linux/kernel.h>
23#include <linux/extable.h>
24#include <linux/kmod.h>
25#include <linux/string.h>
26#include <linux/errno.h>
27#include <linux/ptrace.h>
28#include <linux/timer.h>
29#include <linux/mm.h>
30#include <linux/kallsyms.h>
31#include <linux/uaccess.h>
32
33#include <asm/io.h>
34#include <asm/unwinder.h>
35#include <asm/sections.h>
36
37int kstack_depth_to_print = 0x180;
38int lwa_flag;
39unsigned long __user *lwa_addr;
40
41void print_trace(void *data, unsigned long addr, int reliable)
42{
43 const char *loglvl = data;
44
45 printk("%s[<%p>] %s%pS\n", loglvl, (void *) addr, reliable ? "" : "? ",
46 (void *) addr);
47}
48
49/* displays a short stack trace */
50void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
51{
52 if (esp == NULL)
53 esp = (unsigned long *)&esp;
54
55 printk("%sCall trace:\n", loglvl);
56 unwind_stack((void *)loglvl, esp, print_trace);
57}
58
59void show_registers(struct pt_regs *regs)
60{
61 int i;
62 int in_kernel = 1;
63 unsigned long esp;
64
65 esp = (unsigned long)(regs->sp);
66 if (user_mode(regs))
67 in_kernel = 0;
68
69 printk("CPU #: %d\n"
70 " PC: %08lx SR: %08lx SP: %08lx\n",
71 smp_processor_id(), regs->pc, regs->sr, regs->sp);
72 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
73 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
74 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
75 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
76 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
77 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
78 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
79 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
80 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
81 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
82 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
83 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
84 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
85 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
86 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
87 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
88 printk(" RES: %08lx oGPR11: %08lx\n",
89 regs->gpr[11], regs->orig_gpr11);
90
91 printk("Process %s (pid: %d, stackpage=%08lx)\n",
92 current->comm, current->pid, (unsigned long)current);
93 /*
94 * When in-kernel, we also print out the stack and code at the
95 * time of the fault..
96 */
97 if (in_kernel) {
98
99 printk("\nStack: ");
100 show_stack(NULL, (unsigned long *)esp, KERN_EMERG);
101
102 printk("\nCode: ");
103 if (regs->pc < PAGE_OFFSET)
104 goto bad;
105
106 for (i = -24; i < 24; i++) {
107 unsigned char c;
108 if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
109bad:
110 printk(" Bad PC value.");
111 break;
112 }
113
114 if (i == 0)
115 printk("(%02x) ", c);
116 else
117 printk("%02x ", c);
118 }
119 }
120 printk("\n");
121}
122
123void nommu_dump_state(struct pt_regs *regs,
124 unsigned long ea, unsigned long vector)
125{
126 int i;
127 unsigned long addr, stack = regs->sp;
128
129 printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
130
131 printk("CPU #: %d\n"
132 " PC: %08lx SR: %08lx SP: %08lx\n",
133 0, regs->pc, regs->sr, regs->sp);
134 printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
135 0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
136 printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
137 regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
138 printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
139 regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
140 printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
141 regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
142 printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
143 regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
144 printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
145 regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
146 printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
147 regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
148 printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
149 regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
150 printk(" RES: %08lx oGPR11: %08lx\n",
151 regs->gpr[11], regs->orig_gpr11);
152
153 printk("Process %s (pid: %d, stackpage=%08lx)\n",
154 ((struct task_struct *)(__pa(current)))->comm,
155 ((struct task_struct *)(__pa(current)))->pid,
156 (unsigned long)current);
157
158 printk("\nStack: ");
159 printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
160 for (i = 0; i < kstack_depth_to_print; i++) {
161 if (((long)stack & (THREAD_SIZE - 1)) == 0)
162 break;
163 stack++;
164
165 printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
166 *((unsigned long *)(__pa(stack))));
167 }
168 printk("\n");
169
170 printk("Call Trace: ");
171 i = 1;
172 while (((long)stack & (THREAD_SIZE - 1)) != 0) {
173 addr = *((unsigned long *)__pa(stack));
174 stack++;
175
176 if (kernel_text_address(addr)) {
177 if (i && ((i % 6) == 0))
178 printk("\n ");
179 printk(" [<%08lx>]", addr);
180 i++;
181 }
182 }
183 printk("\n");
184
185 printk("\nCode: ");
186
187 for (i = -24; i < 24; i++) {
188 unsigned char c;
189 c = ((unsigned char *)(__pa(regs->pc)))[i];
190
191 if (i == 0)
192 printk("(%02x) ", c);
193 else
194 printk("%02x ", c);
195 }
196 printk("\n");
197}
198
199/* This is normally the 'Oops' routine */
200void die(const char *str, struct pt_regs *regs, long err)
201{
202
203 console_verbose();
204 printk("\n%s#: %04lx\n", str, err & 0xffff);
205 show_registers(regs);
206#ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
207 printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");
208
209 /* shut down interrupts */
210 local_irq_disable();
211
212 __asm__ __volatile__("l.nop 1");
213 do {} while (1);
214#endif
215 do_exit(SIGSEGV);
216}
217
218/* This is normally the 'Oops' routine */
219void die_if_kernel(const char *str, struct pt_regs *regs, long err)
220{
221 if (user_mode(regs))
222 return;
223
224 die(str, regs, err);
225}
226
227void unhandled_exception(struct pt_regs *regs, int ea, int vector)
228{
229 printk("Unable to handle exception at EA =0x%x, vector 0x%x",
230 ea, vector);
231 die("Oops", regs, 9);
232}
233
234void __init trap_init(void)
235{
236 /* Nothing needs to be done */
237}
238
239asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
240{
241 force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc);
242}
243
244asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
245{
246 if (user_mode(regs)) {
247 /* Send a SIGBUS */
248 force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)address);
249 } else {
250 printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
251 show_registers(regs);
252 die("Die:", regs, address);
253 }
254
255}
256
257asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
258{
259 if (user_mode(regs)) {
260 /* Send a SIGBUS */
261 force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address);
262 } else { /* Kernel mode */
263 printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
264 show_registers(regs);
265 die("Die:", regs, address);
266 }
267}
268
269static inline int in_delay_slot(struct pt_regs *regs)
270{
271#ifdef CONFIG_OPENRISC_NO_SPR_SR_DSX
272 /* No delay slot flag, do the old way */
273 unsigned int op, insn;
274
275 insn = *((unsigned int *)regs->pc);
276 op = insn >> 26;
277 switch (op) {
278 case 0x00: /* l.j */
279 case 0x01: /* l.jal */
280 case 0x03: /* l.bnf */
281 case 0x04: /* l.bf */
282 case 0x11: /* l.jr */
283 case 0x12: /* l.jalr */
284 return 1;
285 default:
286 return 0;
287 }
288#else
289 return mfspr(SPR_SR) & SPR_SR_DSX;
290#endif
291}
292
293static inline void adjust_pc(struct pt_regs *regs, unsigned long address)
294{
295 int displacement;
296 unsigned int rb, op, jmp;
297
298 if (unlikely(in_delay_slot(regs))) {
299 /* In delay slot, instruction at pc is a branch, simulate it */
300 jmp = *((unsigned int *)regs->pc);
301
302 displacement = sign_extend32(((jmp) & 0x3ffffff) << 2, 27);
303 rb = (jmp & 0x0000ffff) >> 11;
304 op = jmp >> 26;
305
306 switch (op) {
307 case 0x00: /* l.j */
308 regs->pc += displacement;
309 return;
310 case 0x01: /* l.jal */
311 regs->pc += displacement;
312 regs->gpr[9] = regs->pc + 8;
313 return;
314 case 0x03: /* l.bnf */
315 if (regs->sr & SPR_SR_F)
316 regs->pc += 8;
317 else
318 regs->pc += displacement;
319 return;
320 case 0x04: /* l.bf */
321 if (regs->sr & SPR_SR_F)
322 regs->pc += displacement;
323 else
324 regs->pc += 8;
325 return;
326 case 0x11: /* l.jr */
327 regs->pc = regs->gpr[rb];
328 return;
329 case 0x12: /* l.jalr */
330 regs->pc = regs->gpr[rb];
331 regs->gpr[9] = regs->pc + 8;
332 return;
333 default:
334 break;
335 }
336 } else {
337 regs->pc += 4;
338 }
339}
340
341static inline void simulate_lwa(struct pt_regs *regs, unsigned long address,
342 unsigned int insn)
343{
344 unsigned int ra, rd;
345 unsigned long value;
346 unsigned long orig_pc;
347 long imm;
348
349 const struct exception_table_entry *entry;
350
351 orig_pc = regs->pc;
352 adjust_pc(regs, address);
353
354 ra = (insn >> 16) & 0x1f;
355 rd = (insn >> 21) & 0x1f;
356 imm = (short)insn;
357 lwa_addr = (unsigned long __user *)(regs->gpr[ra] + imm);
358
359 if ((unsigned long)lwa_addr & 0x3) {
360 do_unaligned_access(regs, address);
361 return;
362 }
363
364 if (get_user(value, lwa_addr)) {
365 if (user_mode(regs)) {
366 force_sig(SIGSEGV);
367 return;
368 }
369
370 if ((entry = search_exception_tables(orig_pc))) {
371 regs->pc = entry->fixup;
372 return;
373 }
374
375 /* kernel access in kernel space, load it directly */
376 value = *((unsigned long *)lwa_addr);
377 }
378
379 lwa_flag = 1;
380 regs->gpr[rd] = value;
381}
382
383static inline void simulate_swa(struct pt_regs *regs, unsigned long address,
384 unsigned int insn)
385{
386 unsigned long __user *vaddr;
387 unsigned long orig_pc;
388 unsigned int ra, rb;
389 long imm;
390
391 const struct exception_table_entry *entry;
392
393 orig_pc = regs->pc;
394 adjust_pc(regs, address);
395
396 ra = (insn >> 16) & 0x1f;
397 rb = (insn >> 11) & 0x1f;
398 imm = (short)(((insn & 0x2200000) >> 10) | (insn & 0x7ff));
399 vaddr = (unsigned long __user *)(regs->gpr[ra] + imm);
400
401 if (!lwa_flag || vaddr != lwa_addr) {
402 regs->sr &= ~SPR_SR_F;
403 return;
404 }
405
406 if ((unsigned long)vaddr & 0x3) {
407 do_unaligned_access(regs, address);
408 return;
409 }
410
411 if (put_user(regs->gpr[rb], vaddr)) {
412 if (user_mode(regs)) {
413 force_sig(SIGSEGV);
414 return;
415 }
416
417 if ((entry = search_exception_tables(orig_pc))) {
418 regs->pc = entry->fixup;
419 return;
420 }
421
422 /* kernel access in kernel space, store it directly */
423 *((unsigned long *)vaddr) = regs->gpr[rb];
424 }
425
426 lwa_flag = 0;
427 regs->sr |= SPR_SR_F;
428}
429
430#define INSN_LWA 0x1b
431#define INSN_SWA 0x33
432
433asmlinkage void do_illegal_instruction(struct pt_regs *regs,
434 unsigned long address)
435{
436 unsigned int op;
437 unsigned int insn = *((unsigned int *)address);
438
439 op = insn >> 26;
440
441 switch (op) {
442 case INSN_LWA:
443 simulate_lwa(regs, address, insn);
444 return;
445
446 case INSN_SWA:
447 simulate_swa(regs, address, insn);
448 return;
449
450 default:
451 break;
452 }
453
454 if (user_mode(regs)) {
455 /* Send a SIGILL */
456 force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)address);
457 } else { /* Kernel mode */
458 printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
459 address);
460 show_registers(regs);
461 die("Die:", regs, address);
462 }
463}
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 <linux/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}