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authorGreg Ungerer <gerg@uclinux.org>2011-06-24 02:27:09 -0400
committerGreg Ungerer <gerg@uclinux.org>2011-10-18 00:22:25 -0400
commit144077ead4428732d27553d3fa74f06f71c6438d (patch)
tree8aba533bcf1f6ceb5971271e8f9de338ddb3e244
parentbc4f4ac2f09a0681b4bd10e698e7f0c6e5137ca0 (diff)
m68k: merge the mmu and non-mmu traps.c files
The code for handling traps in the non-mmu case is a subset of the mmu enabled case. Merge the non-mmu traps_no.c code back to a single traps.c. There is actually no code mmu specific here at all, and the processor specific code (for the more complex 68020/68030/68040/68060) is already proplerly conditionaly used. The format of console exception dump is a little different, but I don't think will cause any one problems, it is purely for debug purposes. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat
-rw-r--r--arch/m68k/include/asm/processor.h6
-rw-r--r--arch/m68k/kernel/traps.c1108
-rw-r--r--arch/m68k/kernel/traps_mm.c1092
-rw-r--r--arch/m68k/kernel/traps_no.c361
4 files changed, 1111 insertions, 1456 deletions
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index d8ef53ac03f9..568facf30276 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -135,6 +135,12 @@ do { \
135 wrusp(_usp); \ 135 wrusp(_usp); \
136} while(0) 136} while(0)
137 137
138static inline int handle_kernel_fault(struct pt_regs *regs)
139{
140 /* Any fault in kernel is fatal on non-mmu */
141 return 0;
142}
143
138#endif 144#endif
139 145
140/* Forward declaration, a strange C thing */ 146/* Forward declaration, a strange C thing */
diff --git a/arch/m68k/kernel/traps.c b/arch/m68k/kernel/traps.c
index c98add3f5f0f..89362f2bb56a 100644
--- a/arch/m68k/kernel/traps.c
+++ b/arch/m68k/kernel/traps.c
@@ -1,5 +1,1107 @@
1#ifdef CONFIG_MMU 1/*
2#include "traps_mm.c" 2 * linux/arch/m68k/kernel/traps.c
3 *
4 * Copyright (C) 1993, 1994 by Hamish Macdonald
5 *
6 * 68040 fixes by Michael Rausch
7 * 68040 fixes by Martin Apel
8 * 68040 fixes and writeback by Richard Zidlicky
9 * 68060 fixes by Roman Hodek
10 * 68060 fixes by Jesper Skov
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/*
18 * Sets up all exception vectors
19 */
20
21#include <linux/sched.h>
22#include <linux/signal.h>
23#include <linux/kernel.h>
24#include <linux/mm.h>
25#include <linux/module.h>
26#include <linux/user.h>
27#include <linux/string.h>
28#include <linux/linkage.h>
29#include <linux/init.h>
30#include <linux/ptrace.h>
31#include <linux/kallsyms.h>
32
33#include <asm/setup.h>
34#include <asm/fpu.h>
35#include <asm/system.h>
36#include <asm/uaccess.h>
37#include <asm/traps.h>
38#include <asm/pgalloc.h>
39#include <asm/machdep.h>
40#include <asm/siginfo.h>
41
42
43static const char *vec_names[] = {
44 [VEC_RESETSP] = "RESET SP",
45 [VEC_RESETPC] = "RESET PC",
46 [VEC_BUSERR] = "BUS ERROR",
47 [VEC_ADDRERR] = "ADDRESS ERROR",
48 [VEC_ILLEGAL] = "ILLEGAL INSTRUCTION",
49 [VEC_ZERODIV] = "ZERO DIVIDE",
50 [VEC_CHK] = "CHK",
51 [VEC_TRAP] = "TRAPcc",
52 [VEC_PRIV] = "PRIVILEGE VIOLATION",
53 [VEC_TRACE] = "TRACE",
54 [VEC_LINE10] = "LINE 1010",
55 [VEC_LINE11] = "LINE 1111",
56 [VEC_RESV12] = "UNASSIGNED RESERVED 12",
57 [VEC_COPROC] = "COPROCESSOR PROTOCOL VIOLATION",
58 [VEC_FORMAT] = "FORMAT ERROR",
59 [VEC_UNINT] = "UNINITIALIZED INTERRUPT",
60 [VEC_RESV16] = "UNASSIGNED RESERVED 16",
61 [VEC_RESV17] = "UNASSIGNED RESERVED 17",
62 [VEC_RESV18] = "UNASSIGNED RESERVED 18",
63 [VEC_RESV19] = "UNASSIGNED RESERVED 19",
64 [VEC_RESV20] = "UNASSIGNED RESERVED 20",
65 [VEC_RESV21] = "UNASSIGNED RESERVED 21",
66 [VEC_RESV22] = "UNASSIGNED RESERVED 22",
67 [VEC_RESV23] = "UNASSIGNED RESERVED 23",
68 [VEC_SPUR] = "SPURIOUS INTERRUPT",
69 [VEC_INT1] = "LEVEL 1 INT",
70 [VEC_INT2] = "LEVEL 2 INT",
71 [VEC_INT3] = "LEVEL 3 INT",
72 [VEC_INT4] = "LEVEL 4 INT",
73 [VEC_INT5] = "LEVEL 5 INT",
74 [VEC_INT6] = "LEVEL 6 INT",
75 [VEC_INT7] = "LEVEL 7 INT",
76 [VEC_SYS] = "SYSCALL",
77 [VEC_TRAP1] = "TRAP #1",
78 [VEC_TRAP2] = "TRAP #2",
79 [VEC_TRAP3] = "TRAP #3",
80 [VEC_TRAP4] = "TRAP #4",
81 [VEC_TRAP5] = "TRAP #5",
82 [VEC_TRAP6] = "TRAP #6",
83 [VEC_TRAP7] = "TRAP #7",
84 [VEC_TRAP8] = "TRAP #8",
85 [VEC_TRAP9] = "TRAP #9",
86 [VEC_TRAP10] = "TRAP #10",
87 [VEC_TRAP11] = "TRAP #11",
88 [VEC_TRAP12] = "TRAP #12",
89 [VEC_TRAP13] = "TRAP #13",
90 [VEC_TRAP14] = "TRAP #14",
91 [VEC_TRAP15] = "TRAP #15",
92 [VEC_FPBRUC] = "FPCP BSUN",
93 [VEC_FPIR] = "FPCP INEXACT",
94 [VEC_FPDIVZ] = "FPCP DIV BY 0",
95 [VEC_FPUNDER] = "FPCP UNDERFLOW",
96 [VEC_FPOE] = "FPCP OPERAND ERROR",
97 [VEC_FPOVER] = "FPCP OVERFLOW",
98 [VEC_FPNAN] = "FPCP SNAN",
99 [VEC_FPUNSUP] = "FPCP UNSUPPORTED OPERATION",
100 [VEC_MMUCFG] = "MMU CONFIGURATION ERROR",
101 [VEC_MMUILL] = "MMU ILLEGAL OPERATION ERROR",
102 [VEC_MMUACC] = "MMU ACCESS LEVEL VIOLATION ERROR",
103 [VEC_RESV59] = "UNASSIGNED RESERVED 59",
104 [VEC_UNIMPEA] = "UNASSIGNED RESERVED 60",
105 [VEC_UNIMPII] = "UNASSIGNED RESERVED 61",
106 [VEC_RESV62] = "UNASSIGNED RESERVED 62",
107 [VEC_RESV63] = "UNASSIGNED RESERVED 63",
108};
109
110static const char *space_names[] = {
111 [0] = "Space 0",
112 [USER_DATA] = "User Data",
113 [USER_PROGRAM] = "User Program",
114#ifndef CONFIG_SUN3
115 [3] = "Space 3",
3#else 116#else
4#include "traps_no.c" 117 [FC_CONTROL] = "Control",
118#endif
119 [4] = "Space 4",
120 [SUPER_DATA] = "Super Data",
121 [SUPER_PROGRAM] = "Super Program",
122 [CPU_SPACE] = "CPU"
123};
124
125void die_if_kernel(char *,struct pt_regs *,int);
126asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
127 unsigned long error_code);
128int send_fault_sig(struct pt_regs *regs);
129
130asmlinkage void trap_c(struct frame *fp);
131
132#if defined (CONFIG_M68060)
133static inline void access_error060 (struct frame *fp)
134{
135 unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */
136
137#ifdef DEBUG
138 printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr);
139#endif
140
141 if (fslw & MMU060_BPE) {
142 /* branch prediction error -> clear branch cache */
143 __asm__ __volatile__ ("movec %/cacr,%/d0\n\t"
144 "orl #0x00400000,%/d0\n\t"
145 "movec %/d0,%/cacr"
146 : : : "d0" );
147 /* return if there's no other error */
148 if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE))
149 return;
150 }
151
152 if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) {
153 unsigned long errorcode;
154 unsigned long addr = fp->un.fmt4.effaddr;
155
156 if (fslw & MMU060_MA)
157 addr = (addr + PAGE_SIZE - 1) & PAGE_MASK;
158
159 errorcode = 1;
160 if (fslw & MMU060_DESC_ERR) {
161 __flush_tlb040_one(addr);
162 errorcode = 0;
163 }
164 if (fslw & MMU060_W)
165 errorcode |= 2;
166#ifdef DEBUG
167 printk("errorcode = %d\n", errorcode );
168#endif
169 do_page_fault(&fp->ptregs, addr, errorcode);
170 } else if (fslw & (MMU060_SEE)){
171 /* Software Emulation Error.
172 * fault during mem_read/mem_write in ifpsp060/os.S
173 */
174 send_fault_sig(&fp->ptregs);
175 } else if (!(fslw & (MMU060_RE|MMU060_WE)) ||
176 send_fault_sig(&fp->ptregs) > 0) {
177 printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr);
178 printk( "68060 access error, fslw=%lx\n", fslw );
179 trap_c( fp );
180 }
181}
182#endif /* CONFIG_M68060 */
183
184#if defined (CONFIG_M68040)
185static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
186{
187 unsigned long mmusr;
188 mm_segment_t old_fs = get_fs();
189
190 set_fs(MAKE_MM_SEG(wbs));
191
192 if (iswrite)
193 asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
194 else
195 asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr));
196
197 asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
198
199 set_fs(old_fs);
200
201 return mmusr;
202}
203
204static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
205 unsigned long wbd)
206{
207 int res = 0;
208 mm_segment_t old_fs = get_fs();
209
210 /* set_fs can not be moved, otherwise put_user() may oops */
211 set_fs(MAKE_MM_SEG(wbs));
212
213 switch (wbs & WBSIZ_040) {
214 case BA_SIZE_BYTE:
215 res = put_user(wbd & 0xff, (char __user *)wba);
216 break;
217 case BA_SIZE_WORD:
218 res = put_user(wbd & 0xffff, (short __user *)wba);
219 break;
220 case BA_SIZE_LONG:
221 res = put_user(wbd, (int __user *)wba);
222 break;
223 }
224
225 /* set_fs can not be moved, otherwise put_user() may oops */
226 set_fs(old_fs);
227
228
229#ifdef DEBUG
230 printk("do_040writeback1, res=%d\n",res);
231#endif
232
233 return res;
234}
235
236/* after an exception in a writeback the stack frame corresponding
237 * to that exception is discarded, set a few bits in the old frame
238 * to simulate what it should look like
239 */
240static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs)
241{
242 fp->un.fmt7.faddr = wba;
243 fp->un.fmt7.ssw = wbs & 0xff;
244 if (wba != current->thread.faddr)
245 fp->un.fmt7.ssw |= MA_040;
246}
247
248static inline void do_040writebacks(struct frame *fp)
249{
250 int res = 0;
251#if 0
252 if (fp->un.fmt7.wb1s & WBV_040)
253 printk("access_error040: cannot handle 1st writeback. oops.\n");
254#endif
255
256 if ((fp->un.fmt7.wb2s & WBV_040) &&
257 !(fp->un.fmt7.wb2s & WBTT_040)) {
258 res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a,
259 fp->un.fmt7.wb2d);
260 if (res)
261 fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s);
262 else
263 fp->un.fmt7.wb2s = 0;
264 }
265
266 /* do the 2nd wb only if the first one was successful (except for a kernel wb) */
267 if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) {
268 res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a,
269 fp->un.fmt7.wb3d);
270 if (res)
271 {
272 fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s);
273
274 fp->un.fmt7.wb2s = fp->un.fmt7.wb3s;
275 fp->un.fmt7.wb3s &= (~WBV_040);
276 fp->un.fmt7.wb2a = fp->un.fmt7.wb3a;
277 fp->un.fmt7.wb2d = fp->un.fmt7.wb3d;
278 }
279 else
280 fp->un.fmt7.wb3s = 0;
281 }
282
283 if (res)
284 send_fault_sig(&fp->ptregs);
285}
286
287/*
288 * called from sigreturn(), must ensure userspace code didn't
289 * manipulate exception frame to circumvent protection, then complete
290 * pending writebacks
291 * we just clear TM2 to turn it into a userspace access
292 */
293asmlinkage void berr_040cleanup(struct frame *fp)
294{
295 fp->un.fmt7.wb2s &= ~4;
296 fp->un.fmt7.wb3s &= ~4;
297
298 do_040writebacks(fp);
299}
300
301static inline void access_error040(struct frame *fp)
302{
303 unsigned short ssw = fp->un.fmt7.ssw;
304 unsigned long mmusr;
305
306#ifdef DEBUG
307 printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr);
308 printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s,
309 fp->un.fmt7.wb2s, fp->un.fmt7.wb3s);
310 printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n",
311 fp->un.fmt7.wb2a, fp->un.fmt7.wb3a,
312 fp->un.fmt7.wb2d, fp->un.fmt7.wb3d);
313#endif
314
315 if (ssw & ATC_040) {
316 unsigned long addr = fp->un.fmt7.faddr;
317 unsigned long errorcode;
318
319 /*
320 * The MMU status has to be determined AFTER the address
321 * has been corrected if there was a misaligned access (MA).
322 */
323 if (ssw & MA_040)
324 addr = (addr + 7) & -8;
325
326 /* MMU error, get the MMUSR info for this access */
327 mmusr = probe040(!(ssw & RW_040), addr, ssw);
328#ifdef DEBUG
329 printk("mmusr = %lx\n", mmusr);
330#endif
331 errorcode = 1;
332 if (!(mmusr & MMU_R_040)) {
333 /* clear the invalid atc entry */
334 __flush_tlb040_one(addr);
335 errorcode = 0;
336 }
337
338 /* despite what documentation seems to say, RMW
339 * accesses have always both the LK and RW bits set */
340 if (!(ssw & RW_040) || (ssw & LK_040))
341 errorcode |= 2;
342
343 if (do_page_fault(&fp->ptregs, addr, errorcode)) {
344#ifdef DEBUG
345 printk("do_page_fault() !=0\n");
346#endif
347 if (user_mode(&fp->ptregs)){
348 /* delay writebacks after signal delivery */
349#ifdef DEBUG
350 printk(".. was usermode - return\n");
351#endif
352 return;
353 }
354 /* disable writeback into user space from kernel
355 * (if do_page_fault didn't fix the mapping,
356 * the writeback won't do good)
357 */
358disable_wb:
359#ifdef DEBUG
360 printk(".. disabling wb2\n");
361#endif
362 if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr)
363 fp->un.fmt7.wb2s &= ~WBV_040;
364 if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr)
365 fp->un.fmt7.wb3s &= ~WBV_040;
366 }
367 } else {
368 /* In case of a bus error we either kill the process or expect
369 * the kernel to catch the fault, which then is also responsible
370 * for cleaning up the mess.
371 */
372 current->thread.signo = SIGBUS;
373 current->thread.faddr = fp->un.fmt7.faddr;
374 if (send_fault_sig(&fp->ptregs) >= 0)
375 printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw,
376 fp->un.fmt7.faddr);
377 goto disable_wb;
378 }
379
380 do_040writebacks(fp);
381}
382#endif /* CONFIG_M68040 */
383
384#if defined(CONFIG_SUN3)
385#include <asm/sun3mmu.h>
386
387extern int mmu_emu_handle_fault (unsigned long, int, int);
388
389/* sun3 version of bus_error030 */
390
391static inline void bus_error030 (struct frame *fp)
392{
393 unsigned char buserr_type = sun3_get_buserr ();
394 unsigned long addr, errorcode;
395 unsigned short ssw = fp->un.fmtb.ssw;
396 extern unsigned long _sun3_map_test_start, _sun3_map_test_end;
397
398#ifdef DEBUG
399 if (ssw & (FC | FB))
400 printk ("Instruction fault at %#010lx\n",
401 ssw & FC ?
402 fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
403 :
404 fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
405 if (ssw & DF)
406 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
407 ssw & RW ? "read" : "write",
408 fp->un.fmtb.daddr,
409 space_names[ssw & DFC], fp->ptregs.pc);
410#endif
411
412 /*
413 * Check if this page should be demand-mapped. This needs to go before
414 * the testing for a bad kernel-space access (demand-mapping applies
415 * to kernel accesses too).
416 */
417
418 if ((ssw & DF)
419 && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) {
420 if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
421 return;
422 }
423
424 /* Check for kernel-space pagefault (BAD). */
425 if (fp->ptregs.sr & PS_S) {
426 /* kernel fault must be a data fault to user space */
427 if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) {
428 // try checking the kernel mappings before surrender
429 if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
430 return;
431 /* instruction fault or kernel data fault! */
432 if (ssw & (FC | FB))
433 printk ("Instruction fault at %#010lx\n",
434 fp->ptregs.pc);
435 if (ssw & DF) {
436 /* was this fault incurred testing bus mappings? */
437 if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) &&
438 (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) {
439 send_fault_sig(&fp->ptregs);
440 return;
441 }
442
443 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
444 ssw & RW ? "read" : "write",
445 fp->un.fmtb.daddr,
446 space_names[ssw & DFC], fp->ptregs.pc);
447 }
448 printk ("BAD KERNEL BUSERR\n");
449
450 die_if_kernel("Oops", &fp->ptregs,0);
451 force_sig(SIGKILL, current);
452 return;
453 }
454 } else {
455 /* user fault */
456 if (!(ssw & (FC | FB)) && !(ssw & DF))
457 /* not an instruction fault or data fault! BAD */
458 panic ("USER BUSERR w/o instruction or data fault");
459 }
460
461
462 /* First handle the data fault, if any. */
463 if (ssw & DF) {
464 addr = fp->un.fmtb.daddr;
465
466// errorcode bit 0: 0 -> no page 1 -> protection fault
467// errorcode bit 1: 0 -> read fault 1 -> write fault
468
469// (buserr_type & SUN3_BUSERR_PROTERR) -> protection fault
470// (buserr_type & SUN3_BUSERR_INVALID) -> invalid page fault
471
472 if (buserr_type & SUN3_BUSERR_PROTERR)
473 errorcode = 0x01;
474 else if (buserr_type & SUN3_BUSERR_INVALID)
475 errorcode = 0x00;
476 else {
477#ifdef DEBUG
478 printk ("*** unexpected busfault type=%#04x\n", buserr_type);
479 printk ("invalid %s access at %#lx from pc %#lx\n",
480 !(ssw & RW) ? "write" : "read", addr,
481 fp->ptregs.pc);
482#endif
483 die_if_kernel ("Oops", &fp->ptregs, buserr_type);
484 force_sig (SIGBUS, current);
485 return;
486 }
487
488//todo: wtf is RM bit? --m
489 if (!(ssw & RW) || ssw & RM)
490 errorcode |= 0x02;
491
492 /* Handle page fault. */
493 do_page_fault (&fp->ptregs, addr, errorcode);
494
495 /* Retry the data fault now. */
496 return;
497 }
498
499 /* Now handle the instruction fault. */
500
501 /* Get the fault address. */
502 if (fp->ptregs.format == 0xA)
503 addr = fp->ptregs.pc + 4;
504 else
505 addr = fp->un.fmtb.baddr;
506 if (ssw & FC)
507 addr -= 2;
508
509 if (buserr_type & SUN3_BUSERR_INVALID) {
510 if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0))
511 do_page_fault (&fp->ptregs, addr, 0);
512 } else {
513#ifdef DEBUG
514 printk ("protection fault on insn access (segv).\n");
515#endif
516 force_sig (SIGSEGV, current);
517 }
518}
519#else
520#if defined(CPU_M68020_OR_M68030)
521static inline void bus_error030 (struct frame *fp)
522{
523 volatile unsigned short temp;
524 unsigned short mmusr;
525 unsigned long addr, errorcode;
526 unsigned short ssw = fp->un.fmtb.ssw;
527#ifdef DEBUG
528 unsigned long desc;
529
530 printk ("pid = %x ", current->pid);
531 printk ("SSW=%#06x ", ssw);
532
533 if (ssw & (FC | FB))
534 printk ("Instruction fault at %#010lx\n",
535 ssw & FC ?
536 fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
537 :
538 fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
539 if (ssw & DF)
540 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
541 ssw & RW ? "read" : "write",
542 fp->un.fmtb.daddr,
543 space_names[ssw & DFC], fp->ptregs.pc);
544#endif
545
546 /* ++andreas: If a data fault and an instruction fault happen
547 at the same time map in both pages. */
548
549 /* First handle the data fault, if any. */
550 if (ssw & DF) {
551 addr = fp->un.fmtb.daddr;
552
553#ifdef DEBUG
554 asm volatile ("ptestr %3,%2@,#7,%0\n\t"
555 "pmove %%psr,%1@"
556 : "=a&" (desc)
557 : "a" (&temp), "a" (addr), "d" (ssw));
558#else
559 asm volatile ("ptestr %2,%1@,#7\n\t"
560 "pmove %%psr,%0@"
561 : : "a" (&temp), "a" (addr), "d" (ssw));
562#endif
563 mmusr = temp;
564
565#ifdef DEBUG
566 printk("mmusr is %#x for addr %#lx in task %p\n",
567 mmusr, addr, current);
568 printk("descriptor address is %#lx, contents %#lx\n",
569 __va(desc), *(unsigned long *)__va(desc));
570#endif
571
572 errorcode = (mmusr & MMU_I) ? 0 : 1;
573 if (!(ssw & RW) || (ssw & RM))
574 errorcode |= 2;
575
576 if (mmusr & (MMU_I | MMU_WP)) {
577 if (ssw & 4) {
578 printk("Data %s fault at %#010lx in %s (pc=%#lx)\n",
579 ssw & RW ? "read" : "write",
580 fp->un.fmtb.daddr,
581 space_names[ssw & DFC], fp->ptregs.pc);
582 goto buserr;
583 }
584 /* Don't try to do anything further if an exception was
585 handled. */
586 if (do_page_fault (&fp->ptregs, addr, errorcode) < 0)
587 return;
588 } else if (!(mmusr & MMU_I)) {
589 /* probably a 020 cas fault */
590 if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0)
591 printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr);
592 } else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
593 printk("invalid %s access at %#lx from pc %#lx\n",
594 !(ssw & RW) ? "write" : "read", addr,
595 fp->ptregs.pc);
596 die_if_kernel("Oops",&fp->ptregs,mmusr);
597 force_sig(SIGSEGV, current);
598 return;
599 } else {
600#if 0
601 static volatile long tlong;
602#endif
603
604 printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
605 !(ssw & RW) ? "write" : "read", addr,
606 fp->ptregs.pc, ssw);
607 asm volatile ("ptestr #1,%1@,#0\n\t"
608 "pmove %%psr,%0@"
609 : /* no outputs */
610 : "a" (&temp), "a" (addr));
611 mmusr = temp;
612
613 printk ("level 0 mmusr is %#x\n", mmusr);
614#if 0
615 asm volatile ("pmove %%tt0,%0@"
616 : /* no outputs */
617 : "a" (&tlong));
618 printk("tt0 is %#lx, ", tlong);
619 asm volatile ("pmove %%tt1,%0@"
620 : /* no outputs */
621 : "a" (&tlong));
622 printk("tt1 is %#lx\n", tlong);
623#endif
624#ifdef DEBUG
625 printk("Unknown SIGSEGV - 1\n");
626#endif
627 die_if_kernel("Oops",&fp->ptregs,mmusr);
628 force_sig(SIGSEGV, current);
629 return;
630 }
631
632 /* setup an ATC entry for the access about to be retried */
633 if (!(ssw & RW) || (ssw & RM))
634 asm volatile ("ploadw %1,%0@" : /* no outputs */
635 : "a" (addr), "d" (ssw));
636 else
637 asm volatile ("ploadr %1,%0@" : /* no outputs */
638 : "a" (addr), "d" (ssw));
639 }
640
641 /* Now handle the instruction fault. */
642
643 if (!(ssw & (FC|FB)))
644 return;
645
646 if (fp->ptregs.sr & PS_S) {
647 printk("Instruction fault at %#010lx\n",
648 fp->ptregs.pc);
649 buserr:
650 printk ("BAD KERNEL BUSERR\n");
651 die_if_kernel("Oops",&fp->ptregs,0);
652 force_sig(SIGKILL, current);
653 return;
654 }
655
656 /* get the fault address */
657 if (fp->ptregs.format == 10)
658 addr = fp->ptregs.pc + 4;
659 else
660 addr = fp->un.fmtb.baddr;
661 if (ssw & FC)
662 addr -= 2;
663
664 if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0)
665 /* Insn fault on same page as data fault. But we
666 should still create the ATC entry. */
667 goto create_atc_entry;
668
669#ifdef DEBUG
670 asm volatile ("ptestr #1,%2@,#7,%0\n\t"
671 "pmove %%psr,%1@"
672 : "=a&" (desc)
673 : "a" (&temp), "a" (addr));
674#else
675 asm volatile ("ptestr #1,%1@,#7\n\t"
676 "pmove %%psr,%0@"
677 : : "a" (&temp), "a" (addr));
678#endif
679 mmusr = temp;
680
681#ifdef DEBUG
682 printk ("mmusr is %#x for addr %#lx in task %p\n",
683 mmusr, addr, current);
684 printk ("descriptor address is %#lx, contents %#lx\n",
685 __va(desc), *(unsigned long *)__va(desc));
686#endif
687
688 if (mmusr & MMU_I)
689 do_page_fault (&fp->ptregs, addr, 0);
690 else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
691 printk ("invalid insn access at %#lx from pc %#lx\n",
692 addr, fp->ptregs.pc);
693#ifdef DEBUG
694 printk("Unknown SIGSEGV - 2\n");
695#endif
696 die_if_kernel("Oops",&fp->ptregs,mmusr);
697 force_sig(SIGSEGV, current);
698 return;
699 }
700
701create_atc_entry:
702 /* setup an ATC entry for the access about to be retried */
703 asm volatile ("ploadr #2,%0@" : /* no outputs */
704 : "a" (addr));
705}
706#endif /* CPU_M68020_OR_M68030 */
707#endif /* !CONFIG_SUN3 */
708
709asmlinkage void buserr_c(struct frame *fp)
710{
711 /* Only set esp0 if coming from user mode */
712 if (user_mode(&fp->ptregs))
713 current->thread.esp0 = (unsigned long) fp;
714
715#ifdef DEBUG
716 printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format);
717#endif
718
719 switch (fp->ptregs.format) {
720#if defined (CONFIG_M68060)
721 case 4: /* 68060 access error */
722 access_error060 (fp);
723 break;
724#endif
725#if defined (CONFIG_M68040)
726 case 0x7: /* 68040 access error */
727 access_error040 (fp);
728 break;
729#endif
730#if defined (CPU_M68020_OR_M68030)
731 case 0xa:
732 case 0xb:
733 bus_error030 (fp);
734 break;
735#endif
736 default:
737 die_if_kernel("bad frame format",&fp->ptregs,0);
738#ifdef DEBUG
739 printk("Unknown SIGSEGV - 4\n");
740#endif
741 force_sig(SIGSEGV, current);
742 }
743}
744
745
746static int kstack_depth_to_print = 48;
747
748void show_trace(unsigned long *stack)
749{
750 unsigned long *endstack;
751 unsigned long addr;
752 int i;
753
754 printk("Call Trace:");
755 addr = (unsigned long)stack + THREAD_SIZE - 1;
756 endstack = (unsigned long *)(addr & -THREAD_SIZE);
757 i = 0;
758 while (stack + 1 <= endstack) {
759 addr = *stack++;
760 /*
761 * If the address is either in the text segment of the
762 * kernel, or in the region which contains vmalloc'ed
763 * memory, it *may* be the address of a calling
764 * routine; if so, print it so that someone tracing
765 * down the cause of the crash will be able to figure
766 * out the call path that was taken.
767 */
768 if (__kernel_text_address(addr)) {
769#ifndef CONFIG_KALLSYMS
770 if (i % 5 == 0)
771 printk("\n ");
772#endif
773 printk(" [<%08lx>] %pS\n", addr, (void *)addr);
774 i++;
775 }
776 }
777 printk("\n");
778}
779
780void show_registers(struct pt_regs *regs)
781{
782 struct frame *fp = (struct frame *)regs;
783 mm_segment_t old_fs = get_fs();
784 u16 c, *cp;
785 unsigned long addr;
786 int i;
787
788 print_modules();
789 printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
790 printk("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2);
791 printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
792 regs->d0, regs->d1, regs->d2, regs->d3);
793 printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
794 regs->d4, regs->d5, regs->a0, regs->a1);
795
796 printk("Process %s (pid: %d, task=%p)\n",
797 current->comm, task_pid_nr(current), current);
798 addr = (unsigned long)&fp->un;
799 printk("Frame format=%X ", regs->format);
800 switch (regs->format) {
801 case 0x2:
802 printk("instr addr=%08lx\n", fp->un.fmt2.iaddr);
803 addr += sizeof(fp->un.fmt2);
804 break;
805 case 0x3:
806 printk("eff addr=%08lx\n", fp->un.fmt3.effaddr);
807 addr += sizeof(fp->un.fmt3);
808 break;
809 case 0x4:
810 printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n"
811 : "eff addr=%08lx pc=%08lx\n"),
812 fp->un.fmt4.effaddr, fp->un.fmt4.pc);
813 addr += sizeof(fp->un.fmt4);
814 break;
815 case 0x7:
816 printk("eff addr=%08lx ssw=%04x faddr=%08lx\n",
817 fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr);
818 printk("wb 1 stat/addr/data: %04x %08lx %08lx\n",
819 fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0);
820 printk("wb 2 stat/addr/data: %04x %08lx %08lx\n",
821 fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d);
822 printk("wb 3 stat/addr/data: %04x %08lx %08lx\n",
823 fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d);
824 printk("push data: %08lx %08lx %08lx %08lx\n",
825 fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2,
826 fp->un.fmt7.pd3);
827 addr += sizeof(fp->un.fmt7);
828 break;
829 case 0x9:
830 printk("instr addr=%08lx\n", fp->un.fmt9.iaddr);
831 addr += sizeof(fp->un.fmt9);
832 break;
833 case 0xa:
834 printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
835 fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb,
836 fp->un.fmta.daddr, fp->un.fmta.dobuf);
837 addr += sizeof(fp->un.fmta);
838 break;
839 case 0xb:
840 printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
841 fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb,
842 fp->un.fmtb.daddr, fp->un.fmtb.dobuf);
843 printk("baddr=%08lx dibuf=%08lx ver=%x\n",
844 fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver);
845 addr += sizeof(fp->un.fmtb);
846 break;
847 default:
848 printk("\n");
849 }
850 show_stack(NULL, (unsigned long *)addr);
851
852 printk("Code:");
853 set_fs(KERNEL_DS);
854 cp = (u16 *)regs->pc;
855 for (i = -8; i < 16; i++) {
856 if (get_user(c, cp + i) && i >= 0) {
857 printk(" Bad PC value.");
858 break;
859 }
860 printk(i ? " %04x" : " <%04x>", c);
861 }
862 set_fs(old_fs);
863 printk ("\n");
864}
865
866void show_stack(struct task_struct *task, unsigned long *stack)
867{
868 unsigned long *p;
869 unsigned long *endstack;
870 int i;
871
872 if (!stack) {
873 if (task)
874 stack = (unsigned long *)task->thread.esp0;
875 else
876 stack = (unsigned long *)&stack;
877 }
878 endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
879
880 printk("Stack from %08lx:", (unsigned long)stack);
881 p = stack;
882 for (i = 0; i < kstack_depth_to_print; i++) {
883 if (p + 1 > endstack)
884 break;
885 if (i % 8 == 0)
886 printk("\n ");
887 printk(" %08lx", *p++);
888 }
889 printk("\n");
890 show_trace(stack);
891}
892
893/*
894 * The architecture-independent backtrace generator
895 */
896void dump_stack(void)
897{
898 unsigned long stack;
899
900 show_trace(&stack);
901}
902
903EXPORT_SYMBOL(dump_stack);
904
905/*
906 * The vector number returned in the frame pointer may also contain
907 * the "fs" (Fault Status) bits on ColdFire. These are in the bottom
908 * 2 bits, and upper 2 bits. So we need to mask out the real vector
909 * number before using it in comparisons. You don't need to do this on
910 * real 68k parts, but it won't hurt either.
911 */
912
913void bad_super_trap (struct frame *fp)
914{
915 int vector = (fp->ptregs.vector >> 2) & 0xff;
916
917 console_verbose();
918 if (vector < ARRAY_SIZE(vec_names))
919 printk ("*** %s *** FORMAT=%X\n",
920 vec_names[vector],
921 fp->ptregs.format);
922 else
923 printk ("*** Exception %d *** FORMAT=%X\n",
924 vector, fp->ptregs.format);
925 if (vector == VEC_ADDRERR && CPU_IS_020_OR_030) {
926 unsigned short ssw = fp->un.fmtb.ssw;
927
928 printk ("SSW=%#06x ", ssw);
929
930 if (ssw & RC)
931 printk ("Pipe stage C instruction fault at %#010lx\n",
932 (fp->ptregs.format) == 0xA ?
933 fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2);
934 if (ssw & RB)
935 printk ("Pipe stage B instruction fault at %#010lx\n",
936 (fp->ptregs.format) == 0xA ?
937 fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
938 if (ssw & DF)
939 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
940 ssw & RW ? "read" : "write",
941 fp->un.fmtb.daddr, space_names[ssw & DFC],
942 fp->ptregs.pc);
943 }
944 printk ("Current process id is %d\n", task_pid_nr(current));
945 die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
946}
947
948asmlinkage void trap_c(struct frame *fp)
949{
950 int sig;
951 int vector = (fp->ptregs.vector >> 2) & 0xff;
952 siginfo_t info;
953
954 if (fp->ptregs.sr & PS_S) {
955 if (vector == VEC_TRACE) {
956 /* traced a trapping instruction on a 68020/30,
957 * real exception will be executed afterwards.
958 */
959 } else if (!handle_kernel_fault(&fp->ptregs))
960 bad_super_trap(fp);
961 return;
962 }
963
964 /* send the appropriate signal to the user program */
965 switch (vector) {
966 case VEC_ADDRERR:
967 info.si_code = BUS_ADRALN;
968 sig = SIGBUS;
969 break;
970 case VEC_ILLEGAL:
971 case VEC_LINE10:
972 case VEC_LINE11:
973 info.si_code = ILL_ILLOPC;
974 sig = SIGILL;
975 break;
976 case VEC_PRIV:
977 info.si_code = ILL_PRVOPC;
978 sig = SIGILL;
979 break;
980 case VEC_COPROC:
981 info.si_code = ILL_COPROC;
982 sig = SIGILL;
983 break;
984 case VEC_TRAP1:
985 case VEC_TRAP2:
986 case VEC_TRAP3:
987 case VEC_TRAP4:
988 case VEC_TRAP5:
989 case VEC_TRAP6:
990 case VEC_TRAP7:
991 case VEC_TRAP8:
992 case VEC_TRAP9:
993 case VEC_TRAP10:
994 case VEC_TRAP11:
995 case VEC_TRAP12:
996 case VEC_TRAP13:
997 case VEC_TRAP14:
998 info.si_code = ILL_ILLTRP;
999 sig = SIGILL;
1000 break;
1001 case VEC_FPBRUC:
1002 case VEC_FPOE:
1003 case VEC_FPNAN:
1004 info.si_code = FPE_FLTINV;
1005 sig = SIGFPE;
1006 break;
1007 case VEC_FPIR:
1008 info.si_code = FPE_FLTRES;
1009 sig = SIGFPE;
1010 break;
1011 case VEC_FPDIVZ:
1012 info.si_code = FPE_FLTDIV;
1013 sig = SIGFPE;
1014 break;
1015 case VEC_FPUNDER:
1016 info.si_code = FPE_FLTUND;
1017 sig = SIGFPE;
1018 break;
1019 case VEC_FPOVER:
1020 info.si_code = FPE_FLTOVF;
1021 sig = SIGFPE;
1022 break;
1023 case VEC_ZERODIV:
1024 info.si_code = FPE_INTDIV;
1025 sig = SIGFPE;
1026 break;
1027 case VEC_CHK:
1028 case VEC_TRAP:
1029 info.si_code = FPE_INTOVF;
1030 sig = SIGFPE;
1031 break;
1032 case VEC_TRACE: /* ptrace single step */
1033 info.si_code = TRAP_TRACE;
1034 sig = SIGTRAP;
1035 break;
1036 case VEC_TRAP15: /* breakpoint */
1037 info.si_code = TRAP_BRKPT;
1038 sig = SIGTRAP;
1039 break;
1040 default:
1041 info.si_code = ILL_ILLOPC;
1042 sig = SIGILL;
1043 break;
1044 }
1045 info.si_signo = sig;
1046 info.si_errno = 0;
1047 switch (fp->ptregs.format) {
1048 default:
1049 info.si_addr = (void *) fp->ptregs.pc;
1050 break;
1051 case 2:
1052 info.si_addr = (void *) fp->un.fmt2.iaddr;
1053 break;
1054 case 7:
1055 info.si_addr = (void *) fp->un.fmt7.effaddr;
1056 break;
1057 case 9:
1058 info.si_addr = (void *) fp->un.fmt9.iaddr;
1059 break;
1060 case 10:
1061 info.si_addr = (void *) fp->un.fmta.daddr;
1062 break;
1063 case 11:
1064 info.si_addr = (void *) fp->un.fmtb.daddr;
1065 break;
1066 }
1067 force_sig_info (sig, &info, current);
1068}
1069
1070void die_if_kernel (char *str, struct pt_regs *fp, int nr)
1071{
1072 if (!(fp->sr & PS_S))
1073 return;
1074
1075 console_verbose();
1076 printk("%s: %08x\n",str,nr);
1077 show_registers(fp);
1078 add_taint(TAINT_DIE);
1079 do_exit(SIGSEGV);
1080}
1081
1082asmlinkage void set_esp0(unsigned long ssp)
1083{
1084 current->thread.esp0 = ssp;
1085}
1086
1087/*
1088 * This function is called if an error occur while accessing
1089 * user-space from the fpsp040 code.
1090 */
1091asmlinkage void fpsp040_die(void)
1092{
1093 do_exit(SIGSEGV);
1094}
1095
1096#ifdef CONFIG_M68KFPU_EMU
1097asmlinkage void fpemu_signal(int signal, int code, void *addr)
1098{
1099 siginfo_t info;
1100
1101 info.si_signo = signal;
1102 info.si_errno = 0;
1103 info.si_code = code;
1104 info.si_addr = addr;
1105 force_sig_info(signal, &info, current);
1106}
5#endif 1107#endif
diff --git a/arch/m68k/kernel/traps_mm.c b/arch/m68k/kernel/traps_mm.c
deleted file mode 100644
index 227d48448c30..000000000000
--- a/arch/m68k/kernel/traps_mm.c
+++ /dev/null
@@ -1,1092 +0,0 @@
1/*
2 * linux/arch/m68k/kernel/traps.c
3 *
4 * Copyright (C) 1993, 1994 by Hamish Macdonald
5 *
6 * 68040 fixes by Michael Rausch
7 * 68040 fixes by Martin Apel
8 * 68040 fixes and writeback by Richard Zidlicky
9 * 68060 fixes by Roman Hodek
10 * 68060 fixes by Jesper Skov
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/*
18 * Sets up all exception vectors
19 */
20
21#include <linux/sched.h>
22#include <linux/signal.h>
23#include <linux/kernel.h>
24#include <linux/mm.h>
25#include <linux/module.h>
26#include <linux/user.h>
27#include <linux/string.h>
28#include <linux/linkage.h>
29#include <linux/init.h>
30#include <linux/ptrace.h>
31#include <linux/kallsyms.h>
32
33#include <asm/setup.h>
34#include <asm/fpu.h>
35#include <asm/system.h>
36#include <asm/uaccess.h>
37#include <asm/traps.h>
38#include <asm/pgalloc.h>
39#include <asm/machdep.h>
40#include <asm/siginfo.h>
41
42
43static const char *vec_names[] = {
44 [VEC_RESETSP] = "RESET SP",
45 [VEC_RESETPC] = "RESET PC",
46 [VEC_BUSERR] = "BUS ERROR",
47 [VEC_ADDRERR] = "ADDRESS ERROR",
48 [VEC_ILLEGAL] = "ILLEGAL INSTRUCTION",
49 [VEC_ZERODIV] = "ZERO DIVIDE",
50 [VEC_CHK] = "CHK",
51 [VEC_TRAP] = "TRAPcc",
52 [VEC_PRIV] = "PRIVILEGE VIOLATION",
53 [VEC_TRACE] = "TRACE",
54 [VEC_LINE10] = "LINE 1010",
55 [VEC_LINE11] = "LINE 1111",
56 [VEC_RESV12] = "UNASSIGNED RESERVED 12",
57 [VEC_COPROC] = "COPROCESSOR PROTOCOL VIOLATION",
58 [VEC_FORMAT] = "FORMAT ERROR",
59 [VEC_UNINT] = "UNINITIALIZED INTERRUPT",
60 [VEC_RESV16] = "UNASSIGNED RESERVED 16",
61 [VEC_RESV17] = "UNASSIGNED RESERVED 17",
62 [VEC_RESV18] = "UNASSIGNED RESERVED 18",
63 [VEC_RESV19] = "UNASSIGNED RESERVED 19",
64 [VEC_RESV20] = "UNASSIGNED RESERVED 20",
65 [VEC_RESV21] = "UNASSIGNED RESERVED 21",
66 [VEC_RESV22] = "UNASSIGNED RESERVED 22",
67 [VEC_RESV23] = "UNASSIGNED RESERVED 23",
68 [VEC_SPUR] = "SPURIOUS INTERRUPT",
69 [VEC_INT1] = "LEVEL 1 INT",
70 [VEC_INT2] = "LEVEL 2 INT",
71 [VEC_INT3] = "LEVEL 3 INT",
72 [VEC_INT4] = "LEVEL 4 INT",
73 [VEC_INT5] = "LEVEL 5 INT",
74 [VEC_INT6] = "LEVEL 6 INT",
75 [VEC_INT7] = "LEVEL 7 INT",
76 [VEC_SYS] = "SYSCALL",
77 [VEC_TRAP1] = "TRAP #1",
78 [VEC_TRAP2] = "TRAP #2",
79 [VEC_TRAP3] = "TRAP #3",
80 [VEC_TRAP4] = "TRAP #4",
81 [VEC_TRAP5] = "TRAP #5",
82 [VEC_TRAP6] = "TRAP #6",
83 [VEC_TRAP7] = "TRAP #7",
84 [VEC_TRAP8] = "TRAP #8",
85 [VEC_TRAP9] = "TRAP #9",
86 [VEC_TRAP10] = "TRAP #10",
87 [VEC_TRAP11] = "TRAP #11",
88 [VEC_TRAP12] = "TRAP #12",
89 [VEC_TRAP13] = "TRAP #13",
90 [VEC_TRAP14] = "TRAP #14",
91 [VEC_TRAP15] = "TRAP #15",
92 [VEC_FPBRUC] = "FPCP BSUN",
93 [VEC_FPIR] = "FPCP INEXACT",
94 [VEC_FPDIVZ] = "FPCP DIV BY 0",
95 [VEC_FPUNDER] = "FPCP UNDERFLOW",
96 [VEC_FPOE] = "FPCP OPERAND ERROR",
97 [VEC_FPOVER] = "FPCP OVERFLOW",
98 [VEC_FPNAN] = "FPCP SNAN",
99 [VEC_FPUNSUP] = "FPCP UNSUPPORTED OPERATION",
100 [VEC_MMUCFG] = "MMU CONFIGURATION ERROR",
101 [VEC_MMUILL] = "MMU ILLEGAL OPERATION ERROR",
102 [VEC_MMUACC] = "MMU ACCESS LEVEL VIOLATION ERROR",
103 [VEC_RESV59] = "UNASSIGNED RESERVED 59",
104 [VEC_UNIMPEA] = "UNASSIGNED RESERVED 60",
105 [VEC_UNIMPII] = "UNASSIGNED RESERVED 61",
106 [VEC_RESV62] = "UNASSIGNED RESERVED 62",
107 [VEC_RESV63] = "UNASSIGNED RESERVED 63",
108};
109
110static const char *space_names[] = {
111 [0] = "Space 0",
112 [USER_DATA] = "User Data",
113 [USER_PROGRAM] = "User Program",
114#ifndef CONFIG_SUN3
115 [3] = "Space 3",
116#else
117 [FC_CONTROL] = "Control",
118#endif
119 [4] = "Space 4",
120 [SUPER_DATA] = "Super Data",
121 [SUPER_PROGRAM] = "Super Program",
122 [CPU_SPACE] = "CPU"
123};
124
125void die_if_kernel(char *,struct pt_regs *,int);
126asmlinkage int do_page_fault(struct pt_regs *regs, unsigned long address,
127 unsigned long error_code);
128int send_fault_sig(struct pt_regs *regs);
129
130asmlinkage void trap_c(struct frame *fp);
131
132#if defined (CONFIG_M68060)
133static inline void access_error060 (struct frame *fp)
134{
135 unsigned long fslw = fp->un.fmt4.pc; /* is really FSLW for access error */
136
137#ifdef DEBUG
138 printk("fslw=%#lx, fa=%#lx\n", fslw, fp->un.fmt4.effaddr);
139#endif
140
141 if (fslw & MMU060_BPE) {
142 /* branch prediction error -> clear branch cache */
143 __asm__ __volatile__ ("movec %/cacr,%/d0\n\t"
144 "orl #0x00400000,%/d0\n\t"
145 "movec %/d0,%/cacr"
146 : : : "d0" );
147 /* return if there's no other error */
148 if (!(fslw & MMU060_ERR_BITS) && !(fslw & MMU060_SEE))
149 return;
150 }
151
152 if (fslw & (MMU060_DESC_ERR | MMU060_WP | MMU060_SP)) {
153 unsigned long errorcode;
154 unsigned long addr = fp->un.fmt4.effaddr;
155
156 if (fslw & MMU060_MA)
157 addr = (addr + PAGE_SIZE - 1) & PAGE_MASK;
158
159 errorcode = 1;
160 if (fslw & MMU060_DESC_ERR) {
161 __flush_tlb040_one(addr);
162 errorcode = 0;
163 }
164 if (fslw & MMU060_W)
165 errorcode |= 2;
166#ifdef DEBUG
167 printk("errorcode = %d\n", errorcode );
168#endif
169 do_page_fault(&fp->ptregs, addr, errorcode);
170 } else if (fslw & (MMU060_SEE)){
171 /* Software Emulation Error.
172 * fault during mem_read/mem_write in ifpsp060/os.S
173 */
174 send_fault_sig(&fp->ptregs);
175 } else if (!(fslw & (MMU060_RE|MMU060_WE)) ||
176 send_fault_sig(&fp->ptregs) > 0) {
177 printk("pc=%#lx, fa=%#lx\n", fp->ptregs.pc, fp->un.fmt4.effaddr);
178 printk( "68060 access error, fslw=%lx\n", fslw );
179 trap_c( fp );
180 }
181}
182#endif /* CONFIG_M68060 */
183
184#if defined (CONFIG_M68040)
185static inline unsigned long probe040(int iswrite, unsigned long addr, int wbs)
186{
187 unsigned long mmusr;
188 mm_segment_t old_fs = get_fs();
189
190 set_fs(MAKE_MM_SEG(wbs));
191
192 if (iswrite)
193 asm volatile (".chip 68040; ptestw (%0); .chip 68k" : : "a" (addr));
194 else
195 asm volatile (".chip 68040; ptestr (%0); .chip 68k" : : "a" (addr));
196
197 asm volatile (".chip 68040; movec %%mmusr,%0; .chip 68k" : "=r" (mmusr));
198
199 set_fs(old_fs);
200
201 return mmusr;
202}
203
204static inline int do_040writeback1(unsigned short wbs, unsigned long wba,
205 unsigned long wbd)
206{
207 int res = 0;
208 mm_segment_t old_fs = get_fs();
209
210 /* set_fs can not be moved, otherwise put_user() may oops */
211 set_fs(MAKE_MM_SEG(wbs));
212
213 switch (wbs & WBSIZ_040) {
214 case BA_SIZE_BYTE:
215 res = put_user(wbd & 0xff, (char __user *)wba);
216 break;
217 case BA_SIZE_WORD:
218 res = put_user(wbd & 0xffff, (short __user *)wba);
219 break;
220 case BA_SIZE_LONG:
221 res = put_user(wbd, (int __user *)wba);
222 break;
223 }
224
225 /* set_fs can not be moved, otherwise put_user() may oops */
226 set_fs(old_fs);
227
228
229#ifdef DEBUG
230 printk("do_040writeback1, res=%d\n",res);
231#endif
232
233 return res;
234}
235
236/* after an exception in a writeback the stack frame corresponding
237 * to that exception is discarded, set a few bits in the old frame
238 * to simulate what it should look like
239 */
240static inline void fix_xframe040(struct frame *fp, unsigned long wba, unsigned short wbs)
241{
242 fp->un.fmt7.faddr = wba;
243 fp->un.fmt7.ssw = wbs & 0xff;
244 if (wba != current->thread.faddr)
245 fp->un.fmt7.ssw |= MA_040;
246}
247
248static inline void do_040writebacks(struct frame *fp)
249{
250 int res = 0;
251#if 0
252 if (fp->un.fmt7.wb1s & WBV_040)
253 printk("access_error040: cannot handle 1st writeback. oops.\n");
254#endif
255
256 if ((fp->un.fmt7.wb2s & WBV_040) &&
257 !(fp->un.fmt7.wb2s & WBTT_040)) {
258 res = do_040writeback1(fp->un.fmt7.wb2s, fp->un.fmt7.wb2a,
259 fp->un.fmt7.wb2d);
260 if (res)
261 fix_xframe040(fp, fp->un.fmt7.wb2a, fp->un.fmt7.wb2s);
262 else
263 fp->un.fmt7.wb2s = 0;
264 }
265
266 /* do the 2nd wb only if the first one was successful (except for a kernel wb) */
267 if (fp->un.fmt7.wb3s & WBV_040 && (!res || fp->un.fmt7.wb3s & 4)) {
268 res = do_040writeback1(fp->un.fmt7.wb3s, fp->un.fmt7.wb3a,
269 fp->un.fmt7.wb3d);
270 if (res)
271 {
272 fix_xframe040(fp, fp->un.fmt7.wb3a, fp->un.fmt7.wb3s);
273
274 fp->un.fmt7.wb2s = fp->un.fmt7.wb3s;
275 fp->un.fmt7.wb3s &= (~WBV_040);
276 fp->un.fmt7.wb2a = fp->un.fmt7.wb3a;
277 fp->un.fmt7.wb2d = fp->un.fmt7.wb3d;
278 }
279 else
280 fp->un.fmt7.wb3s = 0;
281 }
282
283 if (res)
284 send_fault_sig(&fp->ptregs);
285}
286
287/*
288 * called from sigreturn(), must ensure userspace code didn't
289 * manipulate exception frame to circumvent protection, then complete
290 * pending writebacks
291 * we just clear TM2 to turn it into a userspace access
292 */
293asmlinkage void berr_040cleanup(struct frame *fp)
294{
295 fp->un.fmt7.wb2s &= ~4;
296 fp->un.fmt7.wb3s &= ~4;
297
298 do_040writebacks(fp);
299}
300
301static inline void access_error040(struct frame *fp)
302{
303 unsigned short ssw = fp->un.fmt7.ssw;
304 unsigned long mmusr;
305
306#ifdef DEBUG
307 printk("ssw=%#x, fa=%#lx\n", ssw, fp->un.fmt7.faddr);
308 printk("wb1s=%#x, wb2s=%#x, wb3s=%#x\n", fp->un.fmt7.wb1s,
309 fp->un.fmt7.wb2s, fp->un.fmt7.wb3s);
310 printk ("wb2a=%lx, wb3a=%lx, wb2d=%lx, wb3d=%lx\n",
311 fp->un.fmt7.wb2a, fp->un.fmt7.wb3a,
312 fp->un.fmt7.wb2d, fp->un.fmt7.wb3d);
313#endif
314
315 if (ssw & ATC_040) {
316 unsigned long addr = fp->un.fmt7.faddr;
317 unsigned long errorcode;
318
319 /*
320 * The MMU status has to be determined AFTER the address
321 * has been corrected if there was a misaligned access (MA).
322 */
323 if (ssw & MA_040)
324 addr = (addr + 7) & -8;
325
326 /* MMU error, get the MMUSR info for this access */
327 mmusr = probe040(!(ssw & RW_040), addr, ssw);
328#ifdef DEBUG
329 printk("mmusr = %lx\n", mmusr);
330#endif
331 errorcode = 1;
332 if (!(mmusr & MMU_R_040)) {
333 /* clear the invalid atc entry */
334 __flush_tlb040_one(addr);
335 errorcode = 0;
336 }
337
338 /* despite what documentation seems to say, RMW
339 * accesses have always both the LK and RW bits set */
340 if (!(ssw & RW_040) || (ssw & LK_040))
341 errorcode |= 2;
342
343 if (do_page_fault(&fp->ptregs, addr, errorcode)) {
344#ifdef DEBUG
345 printk("do_page_fault() !=0\n");
346#endif
347 if (user_mode(&fp->ptregs)){
348 /* delay writebacks after signal delivery */
349#ifdef DEBUG
350 printk(".. was usermode - return\n");
351#endif
352 return;
353 }
354 /* disable writeback into user space from kernel
355 * (if do_page_fault didn't fix the mapping,
356 * the writeback won't do good)
357 */
358disable_wb:
359#ifdef DEBUG
360 printk(".. disabling wb2\n");
361#endif
362 if (fp->un.fmt7.wb2a == fp->un.fmt7.faddr)
363 fp->un.fmt7.wb2s &= ~WBV_040;
364 if (fp->un.fmt7.wb3a == fp->un.fmt7.faddr)
365 fp->un.fmt7.wb3s &= ~WBV_040;
366 }
367 } else {
368 /* In case of a bus error we either kill the process or expect
369 * the kernel to catch the fault, which then is also responsible
370 * for cleaning up the mess.
371 */
372 current->thread.signo = SIGBUS;
373 current->thread.faddr = fp->un.fmt7.faddr;
374 if (send_fault_sig(&fp->ptregs) >= 0)
375 printk("68040 bus error (ssw=%x, faddr=%lx)\n", ssw,
376 fp->un.fmt7.faddr);
377 goto disable_wb;
378 }
379
380 do_040writebacks(fp);
381}
382#endif /* CONFIG_M68040 */
383
384#if defined(CONFIG_SUN3)
385#include <asm/sun3mmu.h>
386
387extern int mmu_emu_handle_fault (unsigned long, int, int);
388
389/* sun3 version of bus_error030 */
390
391static inline void bus_error030 (struct frame *fp)
392{
393 unsigned char buserr_type = sun3_get_buserr ();
394 unsigned long addr, errorcode;
395 unsigned short ssw = fp->un.fmtb.ssw;
396 extern unsigned long _sun3_map_test_start, _sun3_map_test_end;
397
398#ifdef DEBUG
399 if (ssw & (FC | FB))
400 printk ("Instruction fault at %#010lx\n",
401 ssw & FC ?
402 fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
403 :
404 fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
405 if (ssw & DF)
406 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
407 ssw & RW ? "read" : "write",
408 fp->un.fmtb.daddr,
409 space_names[ssw & DFC], fp->ptregs.pc);
410#endif
411
412 /*
413 * Check if this page should be demand-mapped. This needs to go before
414 * the testing for a bad kernel-space access (demand-mapping applies
415 * to kernel accesses too).
416 */
417
418 if ((ssw & DF)
419 && (buserr_type & (SUN3_BUSERR_PROTERR | SUN3_BUSERR_INVALID))) {
420 if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 0))
421 return;
422 }
423
424 /* Check for kernel-space pagefault (BAD). */
425 if (fp->ptregs.sr & PS_S) {
426 /* kernel fault must be a data fault to user space */
427 if (! ((ssw & DF) && ((ssw & DFC) == USER_DATA))) {
428 // try checking the kernel mappings before surrender
429 if (mmu_emu_handle_fault (fp->un.fmtb.daddr, ssw & RW, 1))
430 return;
431 /* instruction fault or kernel data fault! */
432 if (ssw & (FC | FB))
433 printk ("Instruction fault at %#010lx\n",
434 fp->ptregs.pc);
435 if (ssw & DF) {
436 /* was this fault incurred testing bus mappings? */
437 if((fp->ptregs.pc >= (unsigned long)&_sun3_map_test_start) &&
438 (fp->ptregs.pc <= (unsigned long)&_sun3_map_test_end)) {
439 send_fault_sig(&fp->ptregs);
440 return;
441 }
442
443 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
444 ssw & RW ? "read" : "write",
445 fp->un.fmtb.daddr,
446 space_names[ssw & DFC], fp->ptregs.pc);
447 }
448 printk ("BAD KERNEL BUSERR\n");
449
450 die_if_kernel("Oops", &fp->ptregs,0);
451 force_sig(SIGKILL, current);
452 return;
453 }
454 } else {
455 /* user fault */
456 if (!(ssw & (FC | FB)) && !(ssw & DF))
457 /* not an instruction fault or data fault! BAD */
458 panic ("USER BUSERR w/o instruction or data fault");
459 }
460
461
462 /* First handle the data fault, if any. */
463 if (ssw & DF) {
464 addr = fp->un.fmtb.daddr;
465
466// errorcode bit 0: 0 -> no page 1 -> protection fault
467// errorcode bit 1: 0 -> read fault 1 -> write fault
468
469// (buserr_type & SUN3_BUSERR_PROTERR) -> protection fault
470// (buserr_type & SUN3_BUSERR_INVALID) -> invalid page fault
471
472 if (buserr_type & SUN3_BUSERR_PROTERR)
473 errorcode = 0x01;
474 else if (buserr_type & SUN3_BUSERR_INVALID)
475 errorcode = 0x00;
476 else {
477#ifdef DEBUG
478 printk ("*** unexpected busfault type=%#04x\n", buserr_type);
479 printk ("invalid %s access at %#lx from pc %#lx\n",
480 !(ssw & RW) ? "write" : "read", addr,
481 fp->ptregs.pc);
482#endif
483 die_if_kernel ("Oops", &fp->ptregs, buserr_type);
484 force_sig (SIGBUS, current);
485 return;
486 }
487
488//todo: wtf is RM bit? --m
489 if (!(ssw & RW) || ssw & RM)
490 errorcode |= 0x02;
491
492 /* Handle page fault. */
493 do_page_fault (&fp->ptregs, addr, errorcode);
494
495 /* Retry the data fault now. */
496 return;
497 }
498
499 /* Now handle the instruction fault. */
500
501 /* Get the fault address. */
502 if (fp->ptregs.format == 0xA)
503 addr = fp->ptregs.pc + 4;
504 else
505 addr = fp->un.fmtb.baddr;
506 if (ssw & FC)
507 addr -= 2;
508
509 if (buserr_type & SUN3_BUSERR_INVALID) {
510 if (!mmu_emu_handle_fault (fp->un.fmtb.daddr, 1, 0))
511 do_page_fault (&fp->ptregs, addr, 0);
512 } else {
513#ifdef DEBUG
514 printk ("protection fault on insn access (segv).\n");
515#endif
516 force_sig (SIGSEGV, current);
517 }
518}
519#else
520#if defined(CPU_M68020_OR_M68030)
521static inline void bus_error030 (struct frame *fp)
522{
523 volatile unsigned short temp;
524 unsigned short mmusr;
525 unsigned long addr, errorcode;
526 unsigned short ssw = fp->un.fmtb.ssw;
527#ifdef DEBUG
528 unsigned long desc;
529
530 printk ("pid = %x ", current->pid);
531 printk ("SSW=%#06x ", ssw);
532
533 if (ssw & (FC | FB))
534 printk ("Instruction fault at %#010lx\n",
535 ssw & FC ?
536 fp->ptregs.format == 0xa ? fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2
537 :
538 fp->ptregs.format == 0xa ? fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
539 if (ssw & DF)
540 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
541 ssw & RW ? "read" : "write",
542 fp->un.fmtb.daddr,
543 space_names[ssw & DFC], fp->ptregs.pc);
544#endif
545
546 /* ++andreas: If a data fault and an instruction fault happen
547 at the same time map in both pages. */
548
549 /* First handle the data fault, if any. */
550 if (ssw & DF) {
551 addr = fp->un.fmtb.daddr;
552
553#ifdef DEBUG
554 asm volatile ("ptestr %3,%2@,#7,%0\n\t"
555 "pmove %%psr,%1@"
556 : "=a&" (desc)
557 : "a" (&temp), "a" (addr), "d" (ssw));
558#else
559 asm volatile ("ptestr %2,%1@,#7\n\t"
560 "pmove %%psr,%0@"
561 : : "a" (&temp), "a" (addr), "d" (ssw));
562#endif
563 mmusr = temp;
564
565#ifdef DEBUG
566 printk("mmusr is %#x for addr %#lx in task %p\n",
567 mmusr, addr, current);
568 printk("descriptor address is %#lx, contents %#lx\n",
569 __va(desc), *(unsigned long *)__va(desc));
570#endif
571
572 errorcode = (mmusr & MMU_I) ? 0 : 1;
573 if (!(ssw & RW) || (ssw & RM))
574 errorcode |= 2;
575
576 if (mmusr & (MMU_I | MMU_WP)) {
577 if (ssw & 4) {
578 printk("Data %s fault at %#010lx in %s (pc=%#lx)\n",
579 ssw & RW ? "read" : "write",
580 fp->un.fmtb.daddr,
581 space_names[ssw & DFC], fp->ptregs.pc);
582 goto buserr;
583 }
584 /* Don't try to do anything further if an exception was
585 handled. */
586 if (do_page_fault (&fp->ptregs, addr, errorcode) < 0)
587 return;
588 } else if (!(mmusr & MMU_I)) {
589 /* probably a 020 cas fault */
590 if (!(ssw & RM) && send_fault_sig(&fp->ptregs) > 0)
591 printk("unexpected bus error (%#x,%#x)\n", ssw, mmusr);
592 } else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
593 printk("invalid %s access at %#lx from pc %#lx\n",
594 !(ssw & RW) ? "write" : "read", addr,
595 fp->ptregs.pc);
596 die_if_kernel("Oops",&fp->ptregs,mmusr);
597 force_sig(SIGSEGV, current);
598 return;
599 } else {
600#if 0
601 static volatile long tlong;
602#endif
603
604 printk("weird %s access at %#lx from pc %#lx (ssw is %#x)\n",
605 !(ssw & RW) ? "write" : "read", addr,
606 fp->ptregs.pc, ssw);
607 asm volatile ("ptestr #1,%1@,#0\n\t"
608 "pmove %%psr,%0@"
609 : /* no outputs */
610 : "a" (&temp), "a" (addr));
611 mmusr = temp;
612
613 printk ("level 0 mmusr is %#x\n", mmusr);
614#if 0
615 asm volatile ("pmove %%tt0,%0@"
616 : /* no outputs */
617 : "a" (&tlong));
618 printk("tt0 is %#lx, ", tlong);
619 asm volatile ("pmove %%tt1,%0@"
620 : /* no outputs */
621 : "a" (&tlong));
622 printk("tt1 is %#lx\n", tlong);
623#endif
624#ifdef DEBUG
625 printk("Unknown SIGSEGV - 1\n");
626#endif
627 die_if_kernel("Oops",&fp->ptregs,mmusr);
628 force_sig(SIGSEGV, current);
629 return;
630 }
631
632 /* setup an ATC entry for the access about to be retried */
633 if (!(ssw & RW) || (ssw & RM))
634 asm volatile ("ploadw %1,%0@" : /* no outputs */
635 : "a" (addr), "d" (ssw));
636 else
637 asm volatile ("ploadr %1,%0@" : /* no outputs */
638 : "a" (addr), "d" (ssw));
639 }
640
641 /* Now handle the instruction fault. */
642
643 if (!(ssw & (FC|FB)))
644 return;
645
646 if (fp->ptregs.sr & PS_S) {
647 printk("Instruction fault at %#010lx\n",
648 fp->ptregs.pc);
649 buserr:
650 printk ("BAD KERNEL BUSERR\n");
651 die_if_kernel("Oops",&fp->ptregs,0);
652 force_sig(SIGKILL, current);
653 return;
654 }
655
656 /* get the fault address */
657 if (fp->ptregs.format == 10)
658 addr = fp->ptregs.pc + 4;
659 else
660 addr = fp->un.fmtb.baddr;
661 if (ssw & FC)
662 addr -= 2;
663
664 if ((ssw & DF) && ((addr ^ fp->un.fmtb.daddr) & PAGE_MASK) == 0)
665 /* Insn fault on same page as data fault. But we
666 should still create the ATC entry. */
667 goto create_atc_entry;
668
669#ifdef DEBUG
670 asm volatile ("ptestr #1,%2@,#7,%0\n\t"
671 "pmove %%psr,%1@"
672 : "=a&" (desc)
673 : "a" (&temp), "a" (addr));
674#else
675 asm volatile ("ptestr #1,%1@,#7\n\t"
676 "pmove %%psr,%0@"
677 : : "a" (&temp), "a" (addr));
678#endif
679 mmusr = temp;
680
681#ifdef DEBUG
682 printk ("mmusr is %#x for addr %#lx in task %p\n",
683 mmusr, addr, current);
684 printk ("descriptor address is %#lx, contents %#lx\n",
685 __va(desc), *(unsigned long *)__va(desc));
686#endif
687
688 if (mmusr & MMU_I)
689 do_page_fault (&fp->ptregs, addr, 0);
690 else if (mmusr & (MMU_B|MMU_L|MMU_S)) {
691 printk ("invalid insn access at %#lx from pc %#lx\n",
692 addr, fp->ptregs.pc);
693#ifdef DEBUG
694 printk("Unknown SIGSEGV - 2\n");
695#endif
696 die_if_kernel("Oops",&fp->ptregs,mmusr);
697 force_sig(SIGSEGV, current);
698 return;
699 }
700
701create_atc_entry:
702 /* setup an ATC entry for the access about to be retried */
703 asm volatile ("ploadr #2,%0@" : /* no outputs */
704 : "a" (addr));
705}
706#endif /* CPU_M68020_OR_M68030 */
707#endif /* !CONFIG_SUN3 */
708
709asmlinkage void buserr_c(struct frame *fp)
710{
711 /* Only set esp0 if coming from user mode */
712 if (user_mode(&fp->ptregs))
713 current->thread.esp0 = (unsigned long) fp;
714
715#ifdef DEBUG
716 printk ("*** Bus Error *** Format is %x\n", fp->ptregs.format);
717#endif
718
719 switch (fp->ptregs.format) {
720#if defined (CONFIG_M68060)
721 case 4: /* 68060 access error */
722 access_error060 (fp);
723 break;
724#endif
725#if defined (CONFIG_M68040)
726 case 0x7: /* 68040 access error */
727 access_error040 (fp);
728 break;
729#endif
730#if defined (CPU_M68020_OR_M68030)
731 case 0xa:
732 case 0xb:
733 bus_error030 (fp);
734 break;
735#endif
736 default:
737 die_if_kernel("bad frame format",&fp->ptregs,0);
738#ifdef DEBUG
739 printk("Unknown SIGSEGV - 4\n");
740#endif
741 force_sig(SIGSEGV, current);
742 }
743}
744
745
746static int kstack_depth_to_print = 48;
747
748void show_trace(unsigned long *stack)
749{
750 unsigned long *endstack;
751 unsigned long addr;
752 int i;
753
754 printk("Call Trace:");
755 addr = (unsigned long)stack + THREAD_SIZE - 1;
756 endstack = (unsigned long *)(addr & -THREAD_SIZE);
757 i = 0;
758 while (stack + 1 <= endstack) {
759 addr = *stack++;
760 /*
761 * If the address is either in the text segment of the
762 * kernel, or in the region which contains vmalloc'ed
763 * memory, it *may* be the address of a calling
764 * routine; if so, print it so that someone tracing
765 * down the cause of the crash will be able to figure
766 * out the call path that was taken.
767 */
768 if (__kernel_text_address(addr)) {
769#ifndef CONFIG_KALLSYMS
770 if (i % 5 == 0)
771 printk("\n ");
772#endif
773 printk(" [<%08lx>] %pS\n", addr, (void *)addr);
774 i++;
775 }
776 }
777 printk("\n");
778}
779
780void show_registers(struct pt_regs *regs)
781{
782 struct frame *fp = (struct frame *)regs;
783 mm_segment_t old_fs = get_fs();
784 u16 c, *cp;
785 unsigned long addr;
786 int i;
787
788 print_modules();
789 printk("PC: [<%08lx>] %pS\n", regs->pc, (void *)regs->pc);
790 printk("SR: %04x SP: %p a2: %08lx\n", regs->sr, regs, regs->a2);
791 printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
792 regs->d0, regs->d1, regs->d2, regs->d3);
793 printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
794 regs->d4, regs->d5, regs->a0, regs->a1);
795
796 printk("Process %s (pid: %d, task=%p)\n",
797 current->comm, task_pid_nr(current), current);
798 addr = (unsigned long)&fp->un;
799 printk("Frame format=%X ", regs->format);
800 switch (regs->format) {
801 case 0x2:
802 printk("instr addr=%08lx\n", fp->un.fmt2.iaddr);
803 addr += sizeof(fp->un.fmt2);
804 break;
805 case 0x3:
806 printk("eff addr=%08lx\n", fp->un.fmt3.effaddr);
807 addr += sizeof(fp->un.fmt3);
808 break;
809 case 0x4:
810 printk((CPU_IS_060 ? "fault addr=%08lx fslw=%08lx\n"
811 : "eff addr=%08lx pc=%08lx\n"),
812 fp->un.fmt4.effaddr, fp->un.fmt4.pc);
813 addr += sizeof(fp->un.fmt4);
814 break;
815 case 0x7:
816 printk("eff addr=%08lx ssw=%04x faddr=%08lx\n",
817 fp->un.fmt7.effaddr, fp->un.fmt7.ssw, fp->un.fmt7.faddr);
818 printk("wb 1 stat/addr/data: %04x %08lx %08lx\n",
819 fp->un.fmt7.wb1s, fp->un.fmt7.wb1a, fp->un.fmt7.wb1dpd0);
820 printk("wb 2 stat/addr/data: %04x %08lx %08lx\n",
821 fp->un.fmt7.wb2s, fp->un.fmt7.wb2a, fp->un.fmt7.wb2d);
822 printk("wb 3 stat/addr/data: %04x %08lx %08lx\n",
823 fp->un.fmt7.wb3s, fp->un.fmt7.wb3a, fp->un.fmt7.wb3d);
824 printk("push data: %08lx %08lx %08lx %08lx\n",
825 fp->un.fmt7.wb1dpd0, fp->un.fmt7.pd1, fp->un.fmt7.pd2,
826 fp->un.fmt7.pd3);
827 addr += sizeof(fp->un.fmt7);
828 break;
829 case 0x9:
830 printk("instr addr=%08lx\n", fp->un.fmt9.iaddr);
831 addr += sizeof(fp->un.fmt9);
832 break;
833 case 0xa:
834 printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
835 fp->un.fmta.ssw, fp->un.fmta.isc, fp->un.fmta.isb,
836 fp->un.fmta.daddr, fp->un.fmta.dobuf);
837 addr += sizeof(fp->un.fmta);
838 break;
839 case 0xb:
840 printk("ssw=%04x isc=%04x isb=%04x daddr=%08lx dobuf=%08lx\n",
841 fp->un.fmtb.ssw, fp->un.fmtb.isc, fp->un.fmtb.isb,
842 fp->un.fmtb.daddr, fp->un.fmtb.dobuf);
843 printk("baddr=%08lx dibuf=%08lx ver=%x\n",
844 fp->un.fmtb.baddr, fp->un.fmtb.dibuf, fp->un.fmtb.ver);
845 addr += sizeof(fp->un.fmtb);
846 break;
847 default:
848 printk("\n");
849 }
850 show_stack(NULL, (unsigned long *)addr);
851
852 printk("Code:");
853 set_fs(KERNEL_DS);
854 cp = (u16 *)regs->pc;
855 for (i = -8; i < 16; i++) {
856 if (get_user(c, cp + i) && i >= 0) {
857 printk(" Bad PC value.");
858 break;
859 }
860 printk(i ? " %04x" : " <%04x>", c);
861 }
862 set_fs(old_fs);
863 printk ("\n");
864}
865
866void show_stack(struct task_struct *task, unsigned long *stack)
867{
868 unsigned long *p;
869 unsigned long *endstack;
870 int i;
871
872 if (!stack) {
873 if (task)
874 stack = (unsigned long *)task->thread.esp0;
875 else
876 stack = (unsigned long *)&stack;
877 }
878 endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) & -THREAD_SIZE);
879
880 printk("Stack from %08lx:", (unsigned long)stack);
881 p = stack;
882 for (i = 0; i < kstack_depth_to_print; i++) {
883 if (p + 1 > endstack)
884 break;
885 if (i % 8 == 0)
886 printk("\n ");
887 printk(" %08lx", *p++);
888 }
889 printk("\n");
890 show_trace(stack);
891}
892
893/*
894 * The architecture-independent backtrace generator
895 */
896void dump_stack(void)
897{
898 unsigned long stack;
899
900 show_trace(&stack);
901}
902
903EXPORT_SYMBOL(dump_stack);
904
905void bad_super_trap (struct frame *fp)
906{
907 console_verbose();
908 if (fp->ptregs.vector < 4 * ARRAY_SIZE(vec_names))
909 printk ("*** %s *** FORMAT=%X\n",
910 vec_names[(fp->ptregs.vector) >> 2],
911 fp->ptregs.format);
912 else
913 printk ("*** Exception %d *** FORMAT=%X\n",
914 (fp->ptregs.vector) >> 2,
915 fp->ptregs.format);
916 if (fp->ptregs.vector >> 2 == VEC_ADDRERR && CPU_IS_020_OR_030) {
917 unsigned short ssw = fp->un.fmtb.ssw;
918
919 printk ("SSW=%#06x ", ssw);
920
921 if (ssw & RC)
922 printk ("Pipe stage C instruction fault at %#010lx\n",
923 (fp->ptregs.format) == 0xA ?
924 fp->ptregs.pc + 2 : fp->un.fmtb.baddr - 2);
925 if (ssw & RB)
926 printk ("Pipe stage B instruction fault at %#010lx\n",
927 (fp->ptregs.format) == 0xA ?
928 fp->ptregs.pc + 4 : fp->un.fmtb.baddr);
929 if (ssw & DF)
930 printk ("Data %s fault at %#010lx in %s (pc=%#lx)\n",
931 ssw & RW ? "read" : "write",
932 fp->un.fmtb.daddr, space_names[ssw & DFC],
933 fp->ptregs.pc);
934 }
935 printk ("Current process id is %d\n", task_pid_nr(current));
936 die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
937}
938
939asmlinkage void trap_c(struct frame *fp)
940{
941 int sig;
942 siginfo_t info;
943
944 if (fp->ptregs.sr & PS_S) {
945 if (fp->ptregs.vector == VEC_TRACE << 2) {
946 /* traced a trapping instruction on a 68020/30,
947 * real exception will be executed afterwards.
948 */
949 } else if (!handle_kernel_fault(&fp->ptregs))
950 bad_super_trap(fp);
951 return;
952 }
953
954 /* send the appropriate signal to the user program */
955 switch ((fp->ptregs.vector) >> 2) {
956 case VEC_ADDRERR:
957 info.si_code = BUS_ADRALN;
958 sig = SIGBUS;
959 break;
960 case VEC_ILLEGAL:
961 case VEC_LINE10:
962 case VEC_LINE11:
963 info.si_code = ILL_ILLOPC;
964 sig = SIGILL;
965 break;
966 case VEC_PRIV:
967 info.si_code = ILL_PRVOPC;
968 sig = SIGILL;
969 break;
970 case VEC_COPROC:
971 info.si_code = ILL_COPROC;
972 sig = SIGILL;
973 break;
974 case VEC_TRAP1:
975 case VEC_TRAP2:
976 case VEC_TRAP3:
977 case VEC_TRAP4:
978 case VEC_TRAP5:
979 case VEC_TRAP6:
980 case VEC_TRAP7:
981 case VEC_TRAP8:
982 case VEC_TRAP9:
983 case VEC_TRAP10:
984 case VEC_TRAP11:
985 case VEC_TRAP12:
986 case VEC_TRAP13:
987 case VEC_TRAP14:
988 info.si_code = ILL_ILLTRP;
989 sig = SIGILL;
990 break;
991 case VEC_FPBRUC:
992 case VEC_FPOE:
993 case VEC_FPNAN:
994 info.si_code = FPE_FLTINV;
995 sig = SIGFPE;
996 break;
997 case VEC_FPIR:
998 info.si_code = FPE_FLTRES;
999 sig = SIGFPE;
1000 break;
1001 case VEC_FPDIVZ:
1002 info.si_code = FPE_FLTDIV;
1003 sig = SIGFPE;
1004 break;
1005 case VEC_FPUNDER:
1006 info.si_code = FPE_FLTUND;
1007 sig = SIGFPE;
1008 break;
1009 case VEC_FPOVER:
1010 info.si_code = FPE_FLTOVF;
1011 sig = SIGFPE;
1012 break;
1013 case VEC_ZERODIV:
1014 info.si_code = FPE_INTDIV;
1015 sig = SIGFPE;
1016 break;
1017 case VEC_CHK:
1018 case VEC_TRAP:
1019 info.si_code = FPE_INTOVF;
1020 sig = SIGFPE;
1021 break;
1022 case VEC_TRACE: /* ptrace single step */
1023 info.si_code = TRAP_TRACE;
1024 sig = SIGTRAP;
1025 break;
1026 case VEC_TRAP15: /* breakpoint */
1027 info.si_code = TRAP_BRKPT;
1028 sig = SIGTRAP;
1029 break;
1030 default:
1031 info.si_code = ILL_ILLOPC;
1032 sig = SIGILL;
1033 break;
1034 }
1035 info.si_signo = sig;
1036 info.si_errno = 0;
1037 switch (fp->ptregs.format) {
1038 default:
1039 info.si_addr = (void *) fp->ptregs.pc;
1040 break;
1041 case 2:
1042 info.si_addr = (void *) fp->un.fmt2.iaddr;
1043 break;
1044 case 7:
1045 info.si_addr = (void *) fp->un.fmt7.effaddr;
1046 break;
1047 case 9:
1048 info.si_addr = (void *) fp->un.fmt9.iaddr;
1049 break;
1050 case 10:
1051 info.si_addr = (void *) fp->un.fmta.daddr;
1052 break;
1053 case 11:
1054 info.si_addr = (void *) fp->un.fmtb.daddr;
1055 break;
1056 }
1057 force_sig_info (sig, &info, current);
1058}
1059
1060void die_if_kernel (char *str, struct pt_regs *fp, int nr)
1061{
1062 if (!(fp->sr & PS_S))
1063 return;
1064
1065 console_verbose();
1066 printk("%s: %08x\n",str,nr);
1067 show_registers(fp);
1068 add_taint(TAINT_DIE);
1069 do_exit(SIGSEGV);
1070}
1071
1072/*
1073 * This function is called if an error occur while accessing
1074 * user-space from the fpsp040 code.
1075 */
1076asmlinkage void fpsp040_die(void)
1077{
1078 do_exit(SIGSEGV);
1079}
1080
1081#ifdef CONFIG_M68KFPU_EMU
1082asmlinkage void fpemu_signal(int signal, int code, void *addr)
1083{
1084 siginfo_t info;
1085
1086 info.si_signo = signal;
1087 info.si_errno = 0;
1088 info.si_code = code;
1089 info.si_addr = addr;
1090 force_sig_info(signal, &info, current);
1091}
1092#endif
diff --git a/arch/m68k/kernel/traps_no.c b/arch/m68k/kernel/traps_no.c
deleted file mode 100644
index e67b8c806959..000000000000
--- a/arch/m68k/kernel/traps_no.c
+++ /dev/null
@@ -1,361 +0,0 @@
1/*
2 * linux/arch/m68knommu/kernel/traps.c
3 *
4 * Copyright (C) 1993, 1994 by Hamish Macdonald
5 *
6 * 68040 fixes by Michael Rausch
7 * 68040 fixes by Martin Apel
8 * 68060 fixes by Roman Hodek
9 * 68060 fixes by Jesper Skov
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file COPYING in the main directory of this archive
13 * for more details.
14 */
15
16/*
17 * Sets up all exception vectors
18 */
19#include <linux/sched.h>
20#include <linux/signal.h>
21#include <linux/kernel.h>
22#include <linux/mm.h>
23#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/user.h>
26#include <linux/string.h>
27#include <linux/linkage.h>
28#include <linux/init.h>
29#include <linux/ptrace.h>
30#include <linux/kallsyms.h>
31
32#include <asm/setup.h>
33#include <asm/fpu.h>
34#include <asm/system.h>
35#include <asm/uaccess.h>
36#include <asm/traps.h>
37#include <asm/pgtable.h>
38#include <asm/machdep.h>
39#include <asm/siginfo.h>
40
41static char const * const vec_names[] = {
42 "RESET SP", "RESET PC", "BUS ERROR", "ADDRESS ERROR",
43 "ILLEGAL INSTRUCTION", "ZERO DIVIDE", "CHK", "TRAPcc",
44 "PRIVILEGE VIOLATION", "TRACE", "LINE 1010", "LINE 1111",
45 "UNASSIGNED RESERVED 12", "COPROCESSOR PROTOCOL VIOLATION",
46 "FORMAT ERROR", "UNINITIALIZED INTERRUPT",
47 "UNASSIGNED RESERVED 16", "UNASSIGNED RESERVED 17",
48 "UNASSIGNED RESERVED 18", "UNASSIGNED RESERVED 19",
49 "UNASSIGNED RESERVED 20", "UNASSIGNED RESERVED 21",
50 "UNASSIGNED RESERVED 22", "UNASSIGNED RESERVED 23",
51 "SPURIOUS INTERRUPT", "LEVEL 1 INT", "LEVEL 2 INT", "LEVEL 3 INT",
52 "LEVEL 4 INT", "LEVEL 5 INT", "LEVEL 6 INT", "LEVEL 7 INT",
53 "SYSCALL", "TRAP #1", "TRAP #2", "TRAP #3",
54 "TRAP #4", "TRAP #5", "TRAP #6", "TRAP #7",
55 "TRAP #8", "TRAP #9", "TRAP #10", "TRAP #11",
56 "TRAP #12", "TRAP #13", "TRAP #14", "TRAP #15",
57 "FPCP BSUN", "FPCP INEXACT", "FPCP DIV BY 0", "FPCP UNDERFLOW",
58 "FPCP OPERAND ERROR", "FPCP OVERFLOW", "FPCP SNAN",
59 "FPCP UNSUPPORTED OPERATION",
60 "MMU CONFIGURATION ERROR"
61};
62
63void die_if_kernel(char *str, struct pt_regs *fp, int nr)
64{
65 if (!(fp->sr & PS_S))
66 return;
67
68 console_verbose();
69 printk(KERN_EMERG "%s: %08x\n",str,nr);
70 printk(KERN_EMERG "PC: [<%08lx>]\nSR: %04x SP: %p a2: %08lx\n",
71 fp->pc, fp->sr, fp, fp->a2);
72 printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n",
73 fp->d0, fp->d1, fp->d2, fp->d3);
74 printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n",
75 fp->d4, fp->d5, fp->a0, fp->a1);
76
77 printk(KERN_EMERG "Process %s (pid: %d, stackpage=%08lx)\n",
78 current->comm, current->pid, PAGE_SIZE+(unsigned long)current);
79 show_stack(NULL, (unsigned long *)(fp + 1));
80 add_taint(TAINT_DIE);
81 do_exit(SIGSEGV);
82}
83
84asmlinkage void buserr_c(struct frame *fp)
85{
86 /* Only set esp0 if coming from user mode */
87 if (user_mode(&fp->ptregs))
88 current->thread.esp0 = (unsigned long) fp;
89
90#if defined(DEBUG)
91 printk (KERN_DEBUG "*** Bus Error *** Format is %x\n", fp->ptregs.format);
92#endif
93
94 die_if_kernel("bad frame format",&fp->ptregs,0);
95#if defined(DEBUG)
96 printk(KERN_DEBUG "Unknown SIGSEGV - 4\n");
97#endif
98 force_sig(SIGSEGV, current);
99}
100
101static void print_this_address(unsigned long addr, int i)
102{
103#ifdef CONFIG_KALLSYMS
104 printk(KERN_EMERG " [%08lx] ", addr);
105 print_symbol(KERN_CONT "%s\n", addr);
106#else
107 if (i % 5)
108 printk(KERN_CONT " [%08lx] ", addr);
109 else
110 printk(KERN_EMERG " [%08lx] ", addr);
111 i++;
112#endif
113}
114
115int kstack_depth_to_print = 48;
116
117static void __show_stack(struct task_struct *task, unsigned long *stack)
118{
119 unsigned long *endstack, addr;
120#ifdef CONFIG_FRAME_POINTER
121 unsigned long *last_stack;
122#endif
123 int i;
124
125 if (!stack)
126 stack = (unsigned long *)task->thread.ksp;
127
128 addr = (unsigned long) stack;
129 endstack = (unsigned long *) PAGE_ALIGN(addr);
130
131 printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack);
132 for (i = 0; i < kstack_depth_to_print; i++) {
133 if (stack + 1 + i > endstack)
134 break;
135 if (i % 8 == 0)
136 printk(KERN_EMERG " ");
137 printk(KERN_CONT " %08lx", *(stack + i));
138 }
139 printk("\n");
140 i = 0;
141
142#ifdef CONFIG_FRAME_POINTER
143 printk(KERN_EMERG "Call Trace:\n");
144
145 last_stack = stack - 1;
146 while (stack <= endstack && stack > last_stack) {
147
148 addr = *(stack + 1);
149 print_this_address(addr, i);
150 i++;
151
152 last_stack = stack;
153 stack = (unsigned long *)*stack;
154 }
155 printk("\n");
156#else
157 printk(KERN_EMERG "Call Trace with CONFIG_FRAME_POINTER disabled:\n");
158 while (stack <= endstack) {
159 addr = *stack++;
160 /*
161 * If the address is either in the text segment of the kernel,
162 * or in a region which is occupied by a module then it *may*
163 * be the address of a calling routine; if so, print it so that
164 * someone tracing down the cause of the crash will be able to
165 * figure out the call path that was taken.
166 */
167 if (__kernel_text_address(addr)) {
168 print_this_address(addr, i);
169 i++;
170 }
171 }
172 printk(KERN_CONT "\n");
173#endif
174}
175
176void bad_super_trap(struct frame *fp)
177{
178 int vector = (fp->ptregs.vector >> 2) & 0xff;
179
180 console_verbose();
181 if (vector < ARRAY_SIZE(vec_names))
182 printk (KERN_WARNING "*** %s *** FORMAT=%X\n",
183 vec_names[vector],
184 fp->ptregs.format);
185 else
186 printk (KERN_WARNING "*** Exception %d *** FORMAT=%X\n",
187 vector,
188 fp->ptregs.format);
189 printk (KERN_WARNING "Current process id is %d\n", current->pid);
190 die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0);
191}
192
193asmlinkage void trap_c(struct frame *fp)
194{
195 int sig;
196 int vector = (fp->ptregs.vector >> 2) & 0xff;
197 siginfo_t info;
198
199 if (fp->ptregs.sr & PS_S) {
200 if (vector == VEC_TRACE) {
201 /* traced a trapping instruction */
202 } else
203 bad_super_trap(fp);
204 return;
205 }
206
207 /* send the appropriate signal to the user program */
208 switch (vector) {
209 case VEC_ADDRERR:
210 info.si_code = BUS_ADRALN;
211 sig = SIGBUS;
212 break;
213 case VEC_ILLEGAL:
214 case VEC_LINE10:
215 case VEC_LINE11:
216 info.si_code = ILL_ILLOPC;
217 sig = SIGILL;
218 break;
219 case VEC_PRIV:
220 info.si_code = ILL_PRVOPC;
221 sig = SIGILL;
222 break;
223 case VEC_COPROC:
224 info.si_code = ILL_COPROC;
225 sig = SIGILL;
226 break;
227 case VEC_TRAP1: /* gdbserver breakpoint */
228 fp->ptregs.pc -= 2;
229 info.si_code = TRAP_TRACE;
230 sig = SIGTRAP;
231 break;
232 case VEC_TRAP2:
233 case VEC_TRAP3:
234 case VEC_TRAP4:
235 case VEC_TRAP5:
236 case VEC_TRAP6:
237 case VEC_TRAP7:
238 case VEC_TRAP8:
239 case VEC_TRAP9:
240 case VEC_TRAP10:
241 case VEC_TRAP11:
242 case VEC_TRAP12:
243 case VEC_TRAP13:
244 case VEC_TRAP14:
245 info.si_code = ILL_ILLTRP;
246 sig = SIGILL;
247 break;
248 case VEC_FPBRUC:
249 case VEC_FPOE:
250 case VEC_FPNAN:
251 info.si_code = FPE_FLTINV;
252 sig = SIGFPE;
253 break;
254 case VEC_FPIR:
255 info.si_code = FPE_FLTRES;
256 sig = SIGFPE;
257 break;
258 case VEC_FPDIVZ:
259 info.si_code = FPE_FLTDIV;
260 sig = SIGFPE;
261 break;
262 case VEC_FPUNDER:
263 info.si_code = FPE_FLTUND;
264 sig = SIGFPE;
265 break;
266 case VEC_FPOVER:
267 info.si_code = FPE_FLTOVF;
268 sig = SIGFPE;
269 break;
270 case VEC_ZERODIV:
271 info.si_code = FPE_INTDIV;
272 sig = SIGFPE;
273 break;
274 case VEC_CHK:
275 case VEC_TRAP:
276 info.si_code = FPE_INTOVF;
277 sig = SIGFPE;
278 break;
279 case VEC_TRACE: /* ptrace single step */
280 info.si_code = TRAP_TRACE;
281 sig = SIGTRAP;
282 break;
283 case VEC_TRAP15: /* breakpoint */
284 info.si_code = TRAP_BRKPT;
285 sig = SIGTRAP;
286 break;
287 default:
288 info.si_code = ILL_ILLOPC;
289 sig = SIGILL;
290 break;
291 }
292 info.si_signo = sig;
293 info.si_errno = 0;
294 switch (fp->ptregs.format) {
295 default:
296 info.si_addr = (void *) fp->ptregs.pc;
297 break;
298 case 2:
299 info.si_addr = (void *) fp->un.fmt2.iaddr;
300 break;
301 case 7:
302 info.si_addr = (void *) fp->un.fmt7.effaddr;
303 break;
304 case 9:
305 info.si_addr = (void *) fp->un.fmt9.iaddr;
306 break;
307 case 10:
308 info.si_addr = (void *) fp->un.fmta.daddr;
309 break;
310 case 11:
311 info.si_addr = (void *) fp->un.fmtb.daddr;
312 break;
313 }
314 force_sig_info (sig, &info, current);
315}
316
317asmlinkage void set_esp0(unsigned long ssp)
318{
319 current->thread.esp0 = ssp;
320}
321
322/*
323 * The architecture-independent backtrace generator
324 */
325void dump_stack(void)
326{
327 /*
328 * We need frame pointers for this little trick, which works as follows:
329 *
330 * +------------+ 0x00
331 * | Next SP | -> 0x0c
332 * +------------+ 0x04
333 * | Caller |
334 * +------------+ 0x08
335 * | Local vars | -> our stack var
336 * +------------+ 0x0c
337 * | Next SP | -> 0x18, that is what we pass to show_stack()
338 * +------------+ 0x10
339 * | Caller |
340 * +------------+ 0x14
341 * | Local vars |
342 * +------------+ 0x18
343 * | ... |
344 * +------------+
345 */
346
347 unsigned long *stack;
348
349 stack = (unsigned long *)&stack;
350 stack++;
351 __show_stack(current, stack);
352}
353EXPORT_SYMBOL(dump_stack);
354
355void show_stack(struct task_struct *task, unsigned long *stack)
356{
357 if (!stack && !task)
358 dump_stack();
359 else
360 __show_stack(task, stack);
361}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-01 13:28:17 -0500