Commit | Line | Data |
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5a0015d6 CZ |
1 | /* |
2 | * arch/xtensa/kernel/traps.c | |
3 | * | |
4 | * Exception handling. | |
5 | * | |
6 | * Derived from code with the following copyrights: | |
7 | * Copyright (C) 1994 - 1999 by Ralf Baechle | |
8 | * Modified for R3000 by Paul M. Antoine, 1995, 1996 | |
9 | * Complete output from die() by Ulf Carlsson, 1998 | |
10 | * Copyright (C) 1999 Silicon Graphics, Inc. | |
11 | * | |
12 | * Essentially rewritten for the Xtensa architecture port. | |
13 | * | |
3e4196a5 | 14 | * Copyright (C) 2001 - 2013 Tensilica Inc. |
5a0015d6 CZ |
15 | * |
16 | * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> | |
17 | * Chris Zankel <chris@zankel.net> | |
18 | * Marc Gauthier<marc@tensilica.com, marc@alumni.uwaterloo.ca> | |
19 | * Kevin Chea | |
20 | * | |
21 | * This file is subject to the terms and conditions of the GNU General Public | |
22 | * License. See the file "COPYING" in the main directory of this archive | |
23 | * for more details. | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/stringify.h> | |
31 | #include <linux/kallsyms.h> | |
5c888d53 | 32 | #include <linux/delay.h> |
5a891ed5 | 33 | #include <linux/hardirq.h> |
5a0015d6 | 34 | |
3e4196a5 | 35 | #include <asm/stacktrace.h> |
5a0015d6 CZ |
36 | #include <asm/ptrace.h> |
37 | #include <asm/timex.h> | |
38 | #include <asm/uaccess.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/processor.h> | |
2d6f82fe | 41 | #include <asm/traps.h> |
5a0015d6 CZ |
42 | |
43 | #ifdef CONFIG_KGDB | |
44 | extern int gdb_enter; | |
45 | extern int return_from_debug_flag; | |
46 | #endif | |
47 | ||
48 | /* | |
49 | * Machine specific interrupt handlers | |
50 | */ | |
51 | ||
52 | extern void kernel_exception(void); | |
53 | extern void user_exception(void); | |
54 | ||
55 | extern void fast_syscall_kernel(void); | |
56 | extern void fast_syscall_user(void); | |
57 | extern void fast_alloca(void); | |
58 | extern void fast_unaligned(void); | |
59 | extern void fast_second_level_miss(void); | |
60 | extern void fast_store_prohibited(void); | |
61 | extern void fast_coprocessor(void); | |
62 | ||
63 | extern void do_illegal_instruction (struct pt_regs*); | |
64 | extern void do_interrupt (struct pt_regs*); | |
65 | extern void do_unaligned_user (struct pt_regs*); | |
66 | extern void do_multihit (struct pt_regs*, unsigned long); | |
67 | extern void do_page_fault (struct pt_regs*, unsigned long); | |
68 | extern void do_debug (struct pt_regs*); | |
69 | extern void system_call (struct pt_regs*); | |
70 | ||
71 | /* | |
72 | * The vector table must be preceded by a save area (which | |
73 | * implies it must be in RAM, unless one places RAM immediately | |
74 | * before a ROM and puts the vector at the start of the ROM (!)) | |
75 | */ | |
76 | ||
77 | #define KRNL 0x01 | |
78 | #define USER 0x02 | |
79 | ||
80 | #define COPROCESSOR(x) \ | |
173d6681 | 81 | { EXCCAUSE_COPROCESSOR ## x ## _DISABLED, USER, fast_coprocessor } |
5a0015d6 CZ |
82 | |
83 | typedef struct { | |
84 | int cause; | |
85 | int fast; | |
86 | void* handler; | |
87 | } dispatch_init_table_t; | |
88 | ||
b91dc336 | 89 | static dispatch_init_table_t __initdata dispatch_init_table[] = { |
5a0015d6 | 90 | |
173d6681 CZ |
91 | { EXCCAUSE_ILLEGAL_INSTRUCTION, 0, do_illegal_instruction}, |
92 | { EXCCAUSE_SYSTEM_CALL, KRNL, fast_syscall_kernel }, | |
93 | { EXCCAUSE_SYSTEM_CALL, USER, fast_syscall_user }, | |
94 | { EXCCAUSE_SYSTEM_CALL, 0, system_call }, | |
95 | /* EXCCAUSE_INSTRUCTION_FETCH unhandled */ | |
96 | /* EXCCAUSE_LOAD_STORE_ERROR unhandled*/ | |
97 | { EXCCAUSE_LEVEL1_INTERRUPT, 0, do_interrupt }, | |
98 | { EXCCAUSE_ALLOCA, USER|KRNL, fast_alloca }, | |
99 | /* EXCCAUSE_INTEGER_DIVIDE_BY_ZERO unhandled */ | |
100 | /* EXCCAUSE_PRIVILEGED unhandled */ | |
5a0015d6 | 101 | #if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION |
4ded6282 | 102 | #ifdef CONFIG_XTENSA_UNALIGNED_USER |
173d6681 | 103 | { EXCCAUSE_UNALIGNED, USER, fast_unaligned }, |
5a0015d6 | 104 | #else |
173d6681 | 105 | { EXCCAUSE_UNALIGNED, 0, do_unaligned_user }, |
5a0015d6 | 106 | #endif |
173d6681 | 107 | { EXCCAUSE_UNALIGNED, KRNL, fast_unaligned }, |
5a0015d6 | 108 | #endif |
e5083a63 | 109 | #ifdef CONFIG_MMU |
173d6681 CZ |
110 | { EXCCAUSE_ITLB_MISS, 0, do_page_fault }, |
111 | { EXCCAUSE_ITLB_MISS, USER|KRNL, fast_second_level_miss}, | |
112 | { EXCCAUSE_ITLB_MULTIHIT, 0, do_multihit }, | |
113 | { EXCCAUSE_ITLB_PRIVILEGE, 0, do_page_fault }, | |
114 | /* EXCCAUSE_SIZE_RESTRICTION unhandled */ | |
115 | { EXCCAUSE_FETCH_CACHE_ATTRIBUTE, 0, do_page_fault }, | |
116 | { EXCCAUSE_DTLB_MISS, USER|KRNL, fast_second_level_miss}, | |
117 | { EXCCAUSE_DTLB_MISS, 0, do_page_fault }, | |
118 | { EXCCAUSE_DTLB_MULTIHIT, 0, do_multihit }, | |
119 | { EXCCAUSE_DTLB_PRIVILEGE, 0, do_page_fault }, | |
120 | /* EXCCAUSE_DTLB_SIZE_RESTRICTION unhandled */ | |
121 | { EXCCAUSE_STORE_CACHE_ATTRIBUTE, USER|KRNL, fast_store_prohibited }, | |
122 | { EXCCAUSE_STORE_CACHE_ATTRIBUTE, 0, do_page_fault }, | |
123 | { EXCCAUSE_LOAD_CACHE_ATTRIBUTE, 0, do_page_fault }, | |
e5083a63 | 124 | #endif /* CONFIG_MMU */ |
5a0015d6 | 125 | /* XCCHAL_EXCCAUSE_FLOATING_POINT unhandled */ |
c658eac6 | 126 | #if XTENSA_HAVE_COPROCESSOR(0) |
5a0015d6 CZ |
127 | COPROCESSOR(0), |
128 | #endif | |
c658eac6 | 129 | #if XTENSA_HAVE_COPROCESSOR(1) |
5a0015d6 CZ |
130 | COPROCESSOR(1), |
131 | #endif | |
c658eac6 | 132 | #if XTENSA_HAVE_COPROCESSOR(2) |
5a0015d6 CZ |
133 | COPROCESSOR(2), |
134 | #endif | |
c658eac6 | 135 | #if XTENSA_HAVE_COPROCESSOR(3) |
5a0015d6 CZ |
136 | COPROCESSOR(3), |
137 | #endif | |
c658eac6 | 138 | #if XTENSA_HAVE_COPROCESSOR(4) |
5a0015d6 CZ |
139 | COPROCESSOR(4), |
140 | #endif | |
c658eac6 | 141 | #if XTENSA_HAVE_COPROCESSOR(5) |
5a0015d6 CZ |
142 | COPROCESSOR(5), |
143 | #endif | |
c658eac6 | 144 | #if XTENSA_HAVE_COPROCESSOR(6) |
5a0015d6 CZ |
145 | COPROCESSOR(6), |
146 | #endif | |
c658eac6 | 147 | #if XTENSA_HAVE_COPROCESSOR(7) |
5a0015d6 CZ |
148 | COPROCESSOR(7), |
149 | #endif | |
150 | { EXCCAUSE_MAPPED_DEBUG, 0, do_debug }, | |
151 | { -1, -1, 0 } | |
152 | ||
153 | }; | |
154 | ||
155 | /* The exception table <exc_table> serves two functions: | |
156 | * 1. it contains three dispatch tables (fast_user, fast_kernel, default-c) | |
157 | * 2. it is a temporary memory buffer for the exception handlers. | |
158 | */ | |
159 | ||
f615136c | 160 | DEFINE_PER_CPU(unsigned long, exc_table[EXC_TABLE_SIZE/4]); |
5a0015d6 CZ |
161 | |
162 | void die(const char*, struct pt_regs*, long); | |
163 | ||
164 | static inline void | |
165 | __die_if_kernel(const char *str, struct pt_regs *regs, long err) | |
166 | { | |
167 | if (!user_mode(regs)) | |
168 | die(str, regs, err); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Unhandled Exceptions. Kill user task or panic if in kernel space. | |
173 | */ | |
174 | ||
175 | void do_unhandled(struct pt_regs *regs, unsigned long exccause) | |
176 | { | |
177 | __die_if_kernel("Caught unhandled exception - should not happen", | |
178 | regs, SIGKILL); | |
179 | ||
180 | /* If in user mode, send SIGILL signal to current process */ | |
181 | printk("Caught unhandled exception in '%s' " | |
182 | "(pid = %d, pc = %#010lx) - should not happen\n" | |
183 | "\tEXCCAUSE is %ld\n", | |
19c5870c | 184 | current->comm, task_pid_nr(current), regs->pc, exccause); |
5a0015d6 CZ |
185 | force_sig(SIGILL, current); |
186 | } | |
187 | ||
188 | /* | |
189 | * Multi-hit exception. This if fatal! | |
190 | */ | |
191 | ||
192 | void do_multihit(struct pt_regs *regs, unsigned long exccause) | |
193 | { | |
194 | die("Caught multihit exception", regs, SIGKILL); | |
195 | } | |
196 | ||
197 | /* | |
2d1c645c | 198 | * IRQ handler. |
5a0015d6 CZ |
199 | */ |
200 | ||
5a0015d6 CZ |
201 | extern void do_IRQ(int, struct pt_regs *); |
202 | ||
2d1c645c | 203 | void do_interrupt(struct pt_regs *regs) |
5a0015d6 | 204 | { |
2d1c645c MG |
205 | static const unsigned int_level_mask[] = { |
206 | 0, | |
207 | XCHAL_INTLEVEL1_MASK, | |
208 | XCHAL_INTLEVEL2_MASK, | |
209 | XCHAL_INTLEVEL3_MASK, | |
210 | XCHAL_INTLEVEL4_MASK, | |
211 | XCHAL_INTLEVEL5_MASK, | |
212 | XCHAL_INTLEVEL6_MASK, | |
213 | XCHAL_INTLEVEL7_MASK, | |
214 | }; | |
99623239 MF |
215 | struct pt_regs *old_regs = set_irq_regs(regs); |
216 | ||
217 | irq_enter(); | |
5a0015d6 | 218 | |
2d1c645c MG |
219 | for (;;) { |
220 | unsigned intread = get_sr(interrupt); | |
221 | unsigned intenable = get_sr(intenable); | |
895666a9 MF |
222 | unsigned int_at_level = intread & intenable; |
223 | unsigned level; | |
224 | ||
225 | for (level = LOCKLEVEL; level > 0; --level) { | |
226 | if (int_at_level & int_level_mask[level]) { | |
227 | int_at_level &= int_level_mask[level]; | |
228 | break; | |
229 | } | |
230 | } | |
2d1c645c | 231 | |
895666a9 | 232 | if (level == 0) |
99623239 MF |
233 | break; |
234 | ||
235 | do_IRQ(__ffs(int_at_level), regs); | |
5a0015d6 | 236 | } |
99623239 MF |
237 | |
238 | irq_exit(); | |
239 | set_irq_regs(old_regs); | |
5a0015d6 CZ |
240 | } |
241 | ||
242 | /* | |
243 | * Illegal instruction. Fatal if in kernel space. | |
244 | */ | |
245 | ||
246 | void | |
247 | do_illegal_instruction(struct pt_regs *regs) | |
248 | { | |
249 | __die_if_kernel("Illegal instruction in kernel", regs, SIGKILL); | |
250 | ||
251 | /* If in user mode, send SIGILL signal to current process. */ | |
252 | ||
253 | printk("Illegal Instruction in '%s' (pid = %d, pc = %#010lx)\n", | |
19c5870c | 254 | current->comm, task_pid_nr(current), regs->pc); |
5a0015d6 CZ |
255 | force_sig(SIGILL, current); |
256 | } | |
257 | ||
258 | ||
259 | /* | |
260 | * Handle unaligned memory accesses from user space. Kill task. | |
261 | * | |
262 | * If CONFIG_UNALIGNED_USER is not set, we don't allow unaligned memory | |
263 | * accesses causes from user space. | |
264 | */ | |
265 | ||
266 | #if XCHAL_UNALIGNED_LOAD_EXCEPTION || XCHAL_UNALIGNED_STORE_EXCEPTION | |
4ded6282 | 267 | #ifndef CONFIG_XTENSA_UNALIGNED_USER |
5a0015d6 CZ |
268 | void |
269 | do_unaligned_user (struct pt_regs *regs) | |
270 | { | |
271 | siginfo_t info; | |
272 | ||
273 | __die_if_kernel("Unhandled unaligned exception in kernel", | |
274 | regs, SIGKILL); | |
275 | ||
276 | current->thread.bad_vaddr = regs->excvaddr; | |
277 | current->thread.error_code = -3; | |
278 | printk("Unaligned memory access to %08lx in '%s' " | |
279 | "(pid = %d, pc = %#010lx)\n", | |
19c5870c | 280 | regs->excvaddr, current->comm, task_pid_nr(current), regs->pc); |
5a0015d6 CZ |
281 | info.si_signo = SIGBUS; |
282 | info.si_errno = 0; | |
283 | info.si_code = BUS_ADRALN; | |
284 | info.si_addr = (void *) regs->excvaddr; | |
285 | force_sig_info(SIGSEGV, &info, current); | |
286 | ||
287 | } | |
288 | #endif | |
289 | #endif | |
290 | ||
291 | void | |
292 | do_debug(struct pt_regs *regs) | |
293 | { | |
294 | #ifdef CONFIG_KGDB | |
295 | /* If remote debugging is configured AND enabled, we give control to | |
296 | * kgdb. Otherwise, we fall through, perhaps giving control to the | |
297 | * native debugger. | |
298 | */ | |
299 | ||
300 | if (gdb_enter) { | |
301 | extern void gdb_handle_exception(struct pt_regs *); | |
302 | gdb_handle_exception(regs); | |
303 | return_from_debug_flag = 1; | |
304 | return; | |
305 | } | |
306 | #endif | |
307 | ||
308 | __die_if_kernel("Breakpoint in kernel", regs, SIGKILL); | |
309 | ||
310 | /* If in user mode, send SIGTRAP signal to current process */ | |
311 | ||
312 | force_sig(SIGTRAP, current); | |
313 | } | |
314 | ||
315 | ||
f615136c MF |
316 | static void set_handler(int idx, void *handler) |
317 | { | |
318 | unsigned int cpu; | |
319 | ||
320 | for_each_possible_cpu(cpu) | |
321 | per_cpu(exc_table, cpu)[idx] = (unsigned long)handler; | |
322 | } | |
323 | ||
28570e8d MF |
324 | /* Set exception C handler - for temporary use when probing exceptions */ |
325 | ||
326 | void * __init trap_set_handler(int cause, void *handler) | |
327 | { | |
f615136c MF |
328 | void *previous = (void *)per_cpu(exc_table, 0)[ |
329 | EXC_TABLE_DEFAULT / 4 + cause]; | |
330 | set_handler(EXC_TABLE_DEFAULT / 4 + cause, handler); | |
28570e8d MF |
331 | return previous; |
332 | } | |
333 | ||
334 | ||
f615136c MF |
335 | static void __init trap_init_excsave(void) |
336 | { | |
337 | unsigned long excsave1 = (unsigned long)this_cpu_ptr(exc_table); | |
338 | __asm__ __volatile__("wsr %0, excsave1\n" : : "a" (excsave1)); | |
339 | } | |
340 | ||
5a0015d6 CZ |
341 | /* |
342 | * Initialize dispatch tables. | |
343 | * | |
344 | * The exception vectors are stored compressed the __init section in the | |
345 | * dispatch_init_table. This function initializes the following three tables | |
346 | * from that compressed table: | |
347 | * - fast user first dispatch table for user exceptions | |
348 | * - fast kernel first dispatch table for kernel exceptions | |
349 | * - default C-handler C-handler called by the default fast handler. | |
350 | * | |
351 | * See vectors.S for more details. | |
352 | */ | |
353 | ||
b91dc336 | 354 | void __init trap_init(void) |
5a0015d6 CZ |
355 | { |
356 | int i; | |
357 | ||
358 | /* Setup default vectors. */ | |
359 | ||
360 | for(i = 0; i < 64; i++) { | |
361 | set_handler(EXC_TABLE_FAST_USER/4 + i, user_exception); | |
362 | set_handler(EXC_TABLE_FAST_KERNEL/4 + i, kernel_exception); | |
363 | set_handler(EXC_TABLE_DEFAULT/4 + i, do_unhandled); | |
364 | } | |
365 | ||
366 | /* Setup specific handlers. */ | |
367 | ||
368 | for(i = 0; dispatch_init_table[i].cause >= 0; i++) { | |
369 | ||
370 | int fast = dispatch_init_table[i].fast; | |
371 | int cause = dispatch_init_table[i].cause; | |
372 | void *handler = dispatch_init_table[i].handler; | |
373 | ||
374 | if (fast == 0) | |
375 | set_handler (EXC_TABLE_DEFAULT/4 + cause, handler); | |
376 | if (fast && fast & USER) | |
377 | set_handler (EXC_TABLE_FAST_USER/4 + cause, handler); | |
378 | if (fast && fast & KRNL) | |
379 | set_handler (EXC_TABLE_FAST_KERNEL/4 + cause, handler); | |
380 | } | |
381 | ||
382 | /* Initialize EXCSAVE_1 to hold the address of the exception table. */ | |
f615136c MF |
383 | trap_init_excsave(); |
384 | } | |
5a0015d6 | 385 | |
f615136c MF |
386 | #ifdef CONFIG_SMP |
387 | void __init secondary_trap_init(void) | |
388 | { | |
389 | trap_init_excsave(); | |
5a0015d6 | 390 | } |
f615136c | 391 | #endif |
5a0015d6 CZ |
392 | |
393 | /* | |
394 | * This function dumps the current valid window frame and other base registers. | |
395 | */ | |
396 | ||
397 | void show_regs(struct pt_regs * regs) | |
398 | { | |
399 | int i, wmask; | |
400 | ||
a43cb95d TH |
401 | show_regs_print_info(KERN_DEFAULT); |
402 | ||
5a0015d6 CZ |
403 | wmask = regs->wmask & ~1; |
404 | ||
8d7e8240 | 405 | for (i = 0; i < 16; i++) { |
5a0015d6 | 406 | if ((i % 8) == 0) |
ad361c98 JP |
407 | printk(KERN_INFO "a%02d:", i); |
408 | printk(KERN_CONT " %08lx", regs->areg[i]); | |
5a0015d6 | 409 | } |
ad361c98 | 410 | printk(KERN_CONT "\n"); |
5a0015d6 CZ |
411 | |
412 | printk("pc: %08lx, ps: %08lx, depc: %08lx, excvaddr: %08lx\n", | |
413 | regs->pc, regs->ps, regs->depc, regs->excvaddr); | |
414 | printk("lbeg: %08lx, lend: %08lx lcount: %08lx, sar: %08lx\n", | |
415 | regs->lbeg, regs->lend, regs->lcount, regs->sar); | |
416 | if (user_mode(regs)) | |
417 | printk("wb: %08lx, ws: %08lx, wmask: %08lx, syscall: %ld\n", | |
418 | regs->windowbase, regs->windowstart, regs->wmask, | |
419 | regs->syscall); | |
420 | } | |
421 | ||
3e4196a5 | 422 | static int show_trace_cb(struct stackframe *frame, void *data) |
586411dc | 423 | { |
3e4196a5 MF |
424 | if (kernel_text_address(frame->pc)) { |
425 | printk(" [<%08lx>] ", frame->pc); | |
426 | print_symbol("%s\n", frame->pc); | |
427 | } | |
428 | return 0; | |
586411dc JW |
429 | } |
430 | ||
5a0015d6 CZ |
431 | void show_trace(struct task_struct *task, unsigned long *sp) |
432 | { | |
3e4196a5 MF |
433 | if (!sp) |
434 | sp = stack_pointer(task); | |
5a0015d6 CZ |
435 | |
436 | printk("Call Trace:"); | |
437 | #ifdef CONFIG_KALLSYMS | |
438 | printk("\n"); | |
439 | #endif | |
3e4196a5 | 440 | walk_stackframe(sp, show_trace_cb, NULL); |
5a0015d6 CZ |
441 | printk("\n"); |
442 | } | |
443 | ||
444 | /* | |
445 | * This routine abuses get_user()/put_user() to reference pointers | |
446 | * with at least a bit of error checking ... | |
447 | */ | |
448 | ||
449 | static int kstack_depth_to_print = 24; | |
450 | ||
451 | void show_stack(struct task_struct *task, unsigned long *sp) | |
452 | { | |
453 | int i = 0; | |
454 | unsigned long *stack; | |
455 | ||
28a0ce7f | 456 | if (!sp) |
586411dc | 457 | sp = stack_pointer(task); |
c4c4594b | 458 | stack = sp; |
5a0015d6 CZ |
459 | |
460 | printk("\nStack: "); | |
461 | ||
462 | for (i = 0; i < kstack_depth_to_print; i++) { | |
463 | if (kstack_end(sp)) | |
464 | break; | |
465 | if (i && ((i % 8) == 0)) | |
466 | printk("\n "); | |
467 | printk("%08lx ", *sp++); | |
468 | } | |
469 | printk("\n"); | |
470 | show_trace(task, stack); | |
471 | } | |
472 | ||
5a0015d6 CZ |
473 | void show_code(unsigned int *pc) |
474 | { | |
475 | long i; | |
476 | ||
477 | printk("\nCode:"); | |
478 | ||
479 | for(i = -3 ; i < 6 ; i++) { | |
480 | unsigned long insn; | |
481 | if (__get_user(insn, pc + i)) { | |
482 | printk(" (Bad address in pc)\n"); | |
483 | break; | |
484 | } | |
485 | printk("%c%08lx%c",(i?' ':'<'),insn,(i?' ':'>')); | |
486 | } | |
487 | } | |
488 | ||
34af946a | 489 | DEFINE_SPINLOCK(die_lock); |
5a0015d6 CZ |
490 | |
491 | void die(const char * str, struct pt_regs * regs, long err) | |
492 | { | |
493 | static int die_counter; | |
494 | int nl = 0; | |
495 | ||
496 | console_verbose(); | |
497 | spin_lock_irq(&die_lock); | |
498 | ||
499 | printk("%s: sig: %ld [#%d]\n", str, err, ++die_counter); | |
500 | #ifdef CONFIG_PREEMPT | |
501 | printk("PREEMPT "); | |
502 | nl = 1; | |
503 | #endif | |
504 | if (nl) | |
505 | printk("\n"); | |
506 | show_regs(regs); | |
507 | if (!user_mode(regs)) | |
508 | show_stack(NULL, (unsigned long*)regs->areg[1]); | |
509 | ||
373d4d09 | 510 | add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); |
5a0015d6 CZ |
511 | spin_unlock_irq(&die_lock); |
512 | ||
513 | if (in_interrupt()) | |
514 | panic("Fatal exception in interrupt"); | |
515 | ||
cea6a4ba | 516 | if (panic_on_oops) |
012c437d | 517 | panic("Fatal exception"); |
cea6a4ba | 518 | |
5a0015d6 CZ |
519 | do_exit(err); |
520 | } |