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staging:iio:dac:ad5791: Allow asymmetrical reference voltages
[zen-stable.git] / arch / sparc / kernel / ptrace_64.c
blob96ee50a806613b782ce11e8627f1911ede3fde3f
1 /* ptrace.c: Sparc process tracing support.
2 *
3 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 *
6 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
7 * and David Mosberger.
8 *
9 * Added Linux support -miguel (weird, eh?, the original code was meant
10 * to emulate SunOS).
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/mm.h>
16 #include <linux/errno.h>
17 #include <linux/ptrace.h>
18 #include <linux/user.h>
19 #include <linux/smp.h>
20 #include <linux/security.h>
21 #include <linux/seccomp.h>
22 #include <linux/audit.h>
23 #include <linux/signal.h>
24 #include <linux/regset.h>
25 #include <linux/tracehook.h>
26 #include <trace/syscall.h>
27 #include <linux/compat.h>
28 #include <linux/elf.h>
29
30 #include <asm/asi.h>
31 #include <asm/pgtable.h>
32 #include <asm/system.h>
33 #include <asm/uaccess.h>
34 #include <asm/psrcompat.h>
35 #include <asm/visasm.h>
36 #include <asm/spitfire.h>
37 #include <asm/page.h>
38 #include <asm/cpudata.h>
39 #include <asm/cacheflush.h>
40
41 #define CREATE_TRACE_POINTS
42 #include <trace/events/syscalls.h>
43
44 #include "entry.h"
45
46 /* #define ALLOW_INIT_TRACING */
47
48 /*
49 * Called by kernel/ptrace.c when detaching..
50 *
51 * Make sure single step bits etc are not set.
52 */
53 void ptrace_disable(struct task_struct *child)
54 {
55 /* nothing to do */
56 }
57
58 /* To get the necessary page struct, access_process_vm() first calls
59 * get_user_pages(). This has done a flush_dcache_page() on the
60 * accessed page. Then our caller (copy_{to,from}_user_page()) did
61 * to memcpy to read/write the data from that page.
62 *
63 * Now, the only thing we have to do is:
64 * 1) flush the D-cache if it's possible than an illegal alias
65 * has been created
66 * 2) flush the I-cache if this is pre-cheetah and we did a write
67 */
68 void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
69 unsigned long uaddr, void *kaddr,
70 unsigned long len, int write)
71 {
72 BUG_ON(len > PAGE_SIZE);
73
74 if (tlb_type == hypervisor)
75 return;
76
77 preempt_disable();
78
79 #ifdef DCACHE_ALIASING_POSSIBLE
80 /* If bit 13 of the kernel address we used to access the
81 * user page is the same as the virtual address that page
82 * is mapped to in the user's address space, we can skip the
83 * D-cache flush.
84 */
85 if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
86 unsigned long start = __pa(kaddr);
87 unsigned long end = start + len;
88 unsigned long dcache_line_size;
89
90 dcache_line_size = local_cpu_data().dcache_line_size;
91
92 if (tlb_type == spitfire) {
93 for (; start < end; start += dcache_line_size)
94 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
95 } else {
96 start &= ~(dcache_line_size - 1);
97 for (; start < end; start += dcache_line_size)
98 __asm__ __volatile__(
99 "stxa %%g0, [%0] %1\n\t"
100 "membar #Sync"
101 : /* no outputs */
102 : "r" (start),
103 "i" (ASI_DCACHE_INVALIDATE));
104 }
105 }
106 #endif
107 if (write && tlb_type == spitfire) {
108 unsigned long start = (unsigned long) kaddr;
109 unsigned long end = start + len;
110 unsigned long icache_line_size;
111
112 icache_line_size = local_cpu_data().icache_line_size;
113
114 for (; start < end; start += icache_line_size)
115 flushi(start);
116 }
117
118 preempt_enable();
119 }
120
121 static int get_from_target(struct task_struct *target, unsigned long uaddr,
122 void *kbuf, int len)
123 {
124 if (target == current) {
125 if (copy_from_user(kbuf, (void __user *) uaddr, len))
126 return -EFAULT;
127 } else {
128 int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
129 if (len2 != len)
130 return -EFAULT;
131 }
132 return 0;
133 }
134
135 static int set_to_target(struct task_struct *target, unsigned long uaddr,
136 void *kbuf, int len)
137 {
138 if (target == current) {
139 if (copy_to_user((void __user *) uaddr, kbuf, len))
140 return -EFAULT;
141 } else {
142 int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
143 if (len2 != len)
144 return -EFAULT;
145 }
146 return 0;
147 }
148
149 static int regwindow64_get(struct task_struct *target,
150 const struct pt_regs *regs,
151 struct reg_window *wbuf)
152 {
153 unsigned long rw_addr = regs->u_regs[UREG_I6];
154
155 if (test_tsk_thread_flag(current, TIF_32BIT)) {
156 struct reg_window32 win32;
157 int i;
158
159 if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
160 return -EFAULT;
161 for (i = 0; i < 8; i++)
162 wbuf->locals[i] = win32.locals[i];
163 for (i = 0; i < 8; i++)
164 wbuf->ins[i] = win32.ins[i];
165 } else {
166 rw_addr += STACK_BIAS;
167 if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
168 return -EFAULT;
169 }
170
171 return 0;
172 }
173
174 static int regwindow64_set(struct task_struct *target,
175 const struct pt_regs *regs,
176 struct reg_window *wbuf)
177 {
178 unsigned long rw_addr = regs->u_regs[UREG_I6];
179
180 if (test_tsk_thread_flag(current, TIF_32BIT)) {
181 struct reg_window32 win32;
182 int i;
183
184 for (i = 0; i < 8; i++)
185 win32.locals[i] = wbuf->locals[i];
186 for (i = 0; i < 8; i++)
187 win32.ins[i] = wbuf->ins[i];
188
189 if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
190 return -EFAULT;
191 } else {
192 rw_addr += STACK_BIAS;
193 if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
194 return -EFAULT;
195 }
196
197 return 0;
198 }
199
200 enum sparc_regset {
201 REGSET_GENERAL,
202 REGSET_FP,
203 };
204
205 static int genregs64_get(struct task_struct *target,
206 const struct user_regset *regset,
207 unsigned int pos, unsigned int count,
208 void *kbuf, void __user *ubuf)
209 {
210 const struct pt_regs *regs = task_pt_regs(target);
211 int ret;
212
213 if (target == current)
214 flushw_user();
215
216 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
217 regs->u_regs,
218 0, 16 * sizeof(u64));
219 if (!ret && count && pos < (32 * sizeof(u64))) {
220 struct reg_window window;
221
222 if (regwindow64_get(target, regs, &window))
223 return -EFAULT;
224 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
225 &window,
226 16 * sizeof(u64),
227 32 * sizeof(u64));
228 }
229
230 if (!ret) {
231 /* TSTATE, TPC, TNPC */
232 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
233 &regs->tstate,
234 32 * sizeof(u64),
235 35 * sizeof(u64));
236 }
237
238 if (!ret) {
239 unsigned long y = regs->y;
240
241 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
242 &y,
243 35 * sizeof(u64),
244 36 * sizeof(u64));
245 }
246
247 if (!ret) {
248 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
249 36 * sizeof(u64), -1);
250
251 }
252 return ret;
253 }
254
255 static int genregs64_set(struct task_struct *target,
256 const struct user_regset *regset,
257 unsigned int pos, unsigned int count,
258 const void *kbuf, const void __user *ubuf)
259 {
260 struct pt_regs *regs = task_pt_regs(target);
261 int ret;
262
263 if (target == current)
264 flushw_user();
265
266 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
267 regs->u_regs,
268 0, 16 * sizeof(u64));
269 if (!ret && count && pos < (32 * sizeof(u64))) {
270 struct reg_window window;
271
272 if (regwindow64_get(target, regs, &window))
273 return -EFAULT;
274
275 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
276 &window,
277 16 * sizeof(u64),
278 32 * sizeof(u64));
279
280 if (!ret &&
281 regwindow64_set(target, regs, &window))
282 return -EFAULT;
283 }
284
285 if (!ret && count > 0) {
286 unsigned long tstate;
287
288 /* TSTATE */
289 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
290 &tstate,
291 32 * sizeof(u64),
292 33 * sizeof(u64));
293 if (!ret) {
294 /* Only the condition codes and the "in syscall"
295 * state can be modified in the %tstate register.
296 */
297 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
298 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
299 regs->tstate |= tstate;
300 }
301 }
302
303 if (!ret) {
304 /* TPC, TNPC */
305 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
306 &regs->tpc,
307 33 * sizeof(u64),
308 35 * sizeof(u64));
309 }
310
311 if (!ret) {
312 unsigned long y;
313
314 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
315 &y,
316 35 * sizeof(u64),
317 36 * sizeof(u64));
318 if (!ret)
319 regs->y = y;
320 }
321
322 if (!ret)
323 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
324 36 * sizeof(u64), -1);
325
326 return ret;
327 }
328
329 static int fpregs64_get(struct task_struct *target,
330 const struct user_regset *regset,
331 unsigned int pos, unsigned int count,
332 void *kbuf, void __user *ubuf)
333 {
334 const unsigned long *fpregs = task_thread_info(target)->fpregs;
335 unsigned long fprs, fsr, gsr;
336 int ret;
337
338 if (target == current)
339 save_and_clear_fpu();
340
341 fprs = task_thread_info(target)->fpsaved[0];
342
343 if (fprs & FPRS_DL)
344 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
345 fpregs,
346 0, 16 * sizeof(u64));
347 else
348 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
349 0,
350 16 * sizeof(u64));
351
352 if (!ret) {
353 if (fprs & FPRS_DU)
354 ret = user_regset_copyout(&pos, &count,
355 &kbuf, &ubuf,
356 fpregs + 16,
357 16 * sizeof(u64),
358 32 * sizeof(u64));
359 else
360 ret = user_regset_copyout_zero(&pos, &count,
361 &kbuf, &ubuf,
362 16 * sizeof(u64),
363 32 * sizeof(u64));
364 }
365
366 if (fprs & FPRS_FEF) {
367 fsr = task_thread_info(target)->xfsr[0];
368 gsr = task_thread_info(target)->gsr[0];
369 } else {
370 fsr = gsr = 0;
371 }
372
373 if (!ret)
374 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
375 &fsr,
376 32 * sizeof(u64),
377 33 * sizeof(u64));
378 if (!ret)
379 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
380 &gsr,
381 33 * sizeof(u64),
382 34 * sizeof(u64));
383 if (!ret)
384 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
385 &fprs,
386 34 * sizeof(u64),
387 35 * sizeof(u64));
388
389 if (!ret)
390 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
391 35 * sizeof(u64), -1);
392
393 return ret;
394 }
395
396 static int fpregs64_set(struct task_struct *target,
397 const struct user_regset *regset,
398 unsigned int pos, unsigned int count,
399 const void *kbuf, const void __user *ubuf)
400 {
401 unsigned long *fpregs = task_thread_info(target)->fpregs;
402 unsigned long fprs;
403 int ret;
404
405 if (target == current)
406 save_and_clear_fpu();
407
408 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
409 fpregs,
410 0, 32 * sizeof(u64));
411 if (!ret)
412 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
413 task_thread_info(target)->xfsr,
414 32 * sizeof(u64),
415 33 * sizeof(u64));
416 if (!ret)
417 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
418 task_thread_info(target)->gsr,
419 33 * sizeof(u64),
420 34 * sizeof(u64));
421
422 fprs = task_thread_info(target)->fpsaved[0];
423 if (!ret && count > 0) {
424 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
425 &fprs,
426 34 * sizeof(u64),
427 35 * sizeof(u64));
428 }
429
430 fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
431 task_thread_info(target)->fpsaved[0] = fprs;
432
433 if (!ret)
434 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
435 35 * sizeof(u64), -1);
436 return ret;
437 }
438
439 static const struct user_regset sparc64_regsets[] = {
440 /* Format is:
441 * G0 --> G7
442 * O0 --> O7
443 * L0 --> L7
444 * I0 --> I7
445 * TSTATE, TPC, TNPC, Y
446 */
447 [REGSET_GENERAL] = {
448 .core_note_type = NT_PRSTATUS,
449 .n = 36,
450 .size = sizeof(u64), .align = sizeof(u64),
451 .get = genregs64_get, .set = genregs64_set
452 },
453 /* Format is:
454 * F0 --> F63
455 * FSR
456 * GSR
457 * FPRS
458 */
459 [REGSET_FP] = {
460 .core_note_type = NT_PRFPREG,
461 .n = 35,
462 .size = sizeof(u64), .align = sizeof(u64),
463 .get = fpregs64_get, .set = fpregs64_set
464 },
465 };
466
467 static const struct user_regset_view user_sparc64_view = {
468 .name = "sparc64", .e_machine = EM_SPARCV9,
469 .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
470 };
471
472 #ifdef CONFIG_COMPAT
473 static int genregs32_get(struct task_struct *target,
474 const struct user_regset *regset,
475 unsigned int pos, unsigned int count,
476 void *kbuf, void __user *ubuf)
477 {
478 const struct pt_regs *regs = task_pt_regs(target);
479 compat_ulong_t __user *reg_window;
480 compat_ulong_t *k = kbuf;
481 compat_ulong_t __user *u = ubuf;
482 compat_ulong_t reg;
483
484 if (target == current)
485 flushw_user();
486
487 pos /= sizeof(reg);
488 count /= sizeof(reg);
489
490 if (kbuf) {
491 for (; count > 0 && pos < 16; count--)
492 *k++ = regs->u_regs[pos++];
493
494 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
495 reg_window -= 16;
496 if (target == current) {
497 for (; count > 0 && pos < 32; count--) {
498 if (get_user(*k++, &reg_window[pos++]))
499 return -EFAULT;
500 }
501 } else {
502 for (; count > 0 && pos < 32; count--) {
503 if (access_process_vm(target,
504 (unsigned long)
505 &reg_window[pos],
506 k, sizeof(*k), 0)
507 != sizeof(*k))
508 return -EFAULT;
509 k++;
510 pos++;
511 }
512 }
513 } else {
514 for (; count > 0 && pos < 16; count--) {
515 if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
516 return -EFAULT;
517 }
518
519 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
520 reg_window -= 16;
521 if (target == current) {
522 for (; count > 0 && pos < 32; count--) {
523 if (get_user(reg, &reg_window[pos++]) ||
524 put_user(reg, u++))
525 return -EFAULT;
526 }
527 } else {
528 for (; count > 0 && pos < 32; count--) {
529 if (access_process_vm(target,
530 (unsigned long)
531 &reg_window[pos],
532 &reg, sizeof(reg), 0)
533 != sizeof(reg))
534 return -EFAULT;
535 if (access_process_vm(target,
536 (unsigned long) u,
537 &reg, sizeof(reg), 1)
538 != sizeof(reg))
539 return -EFAULT;
540 pos++;
541 u++;
542 }
543 }
544 }
545 while (count > 0) {
546 switch (pos) {
547 case 32: /* PSR */
548 reg = tstate_to_psr(regs->tstate);
549 break;
550 case 33: /* PC */
551 reg = regs->tpc;
552 break;
553 case 34: /* NPC */
554 reg = regs->tnpc;
555 break;
556 case 35: /* Y */
557 reg = regs->y;
558 break;
559 case 36: /* WIM */
560 case 37: /* TBR */
561 reg = 0;
562 break;
563 default:
564 goto finish;
565 }
566
567 if (kbuf)
568 *k++ = reg;
569 else if (put_user(reg, u++))
570 return -EFAULT;
571 pos++;
572 count--;
573 }
574 finish:
575 pos *= sizeof(reg);
576 count *= sizeof(reg);
577
578 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
579 38 * sizeof(reg), -1);
580 }
581
582 static int genregs32_set(struct task_struct *target,
583 const struct user_regset *regset,
584 unsigned int pos, unsigned int count,
585 const void *kbuf, const void __user *ubuf)
586 {
587 struct pt_regs *regs = task_pt_regs(target);
588 compat_ulong_t __user *reg_window;
589 const compat_ulong_t *k = kbuf;
590 const compat_ulong_t __user *u = ubuf;
591 compat_ulong_t reg;
592
593 if (target == current)
594 flushw_user();
595
596 pos /= sizeof(reg);
597 count /= sizeof(reg);
598
599 if (kbuf) {
600 for (; count > 0 && pos < 16; count--)
601 regs->u_regs[pos++] = *k++;
602
603 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
604 reg_window -= 16;
605 if (target == current) {
606 for (; count > 0 && pos < 32; count--) {
607 if (put_user(*k++, &reg_window[pos++]))
608 return -EFAULT;
609 }
610 } else {
611 for (; count > 0 && pos < 32; count--) {
612 if (access_process_vm(target,
613 (unsigned long)
614 &reg_window[pos],
615 (void *) k,
616 sizeof(*k), 1)
617 != sizeof(*k))
618 return -EFAULT;
619 k++;
620 pos++;
621 }
622 }
623 } else {
624 for (; count > 0 && pos < 16; count--) {
625 if (get_user(reg, u++))
626 return -EFAULT;
627 regs->u_regs[pos++] = reg;
628 }
629
630 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
631 reg_window -= 16;
632 if (target == current) {
633 for (; count > 0 && pos < 32; count--) {
634 if (get_user(reg, u++) ||
635 put_user(reg, &reg_window[pos++]))
636 return -EFAULT;
637 }
638 } else {
639 for (; count > 0 && pos < 32; count--) {
640 if (access_process_vm(target,
641 (unsigned long)
642 u,
643 &reg, sizeof(reg), 0)
644 != sizeof(reg))
645 return -EFAULT;
646 if (access_process_vm(target,
647 (unsigned long)
648 &reg_window[pos],
649 &reg, sizeof(reg), 1)
650 != sizeof(reg))
651 return -EFAULT;
652 pos++;
653 u++;
654 }
655 }
656 }
657 while (count > 0) {
658 unsigned long tstate;
659
660 if (kbuf)
661 reg = *k++;
662 else if (get_user(reg, u++))
663 return -EFAULT;
664
665 switch (pos) {
666 case 32: /* PSR */
667 tstate = regs->tstate;
668 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
669 tstate |= psr_to_tstate_icc(reg);
670 if (reg & PSR_SYSCALL)
671 tstate |= TSTATE_SYSCALL;
672 regs->tstate = tstate;
673 break;
674 case 33: /* PC */
675 regs->tpc = reg;
676 break;
677 case 34: /* NPC */
678 regs->tnpc = reg;
679 break;
680 case 35: /* Y */
681 regs->y = reg;
682 break;
683 case 36: /* WIM */
684 case 37: /* TBR */
685 break;
686 default:
687 goto finish;
688 }
689
690 pos++;
691 count--;
692 }
693 finish:
694 pos *= sizeof(reg);
695 count *= sizeof(reg);
696
697 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
698 38 * sizeof(reg), -1);
699 }
700
701 static int fpregs32_get(struct task_struct *target,
702 const struct user_regset *regset,
703 unsigned int pos, unsigned int count,
704 void *kbuf, void __user *ubuf)
705 {
706 const unsigned long *fpregs = task_thread_info(target)->fpregs;
707 compat_ulong_t enabled;
708 unsigned long fprs;
709 compat_ulong_t fsr;
710 int ret = 0;
711
712 if (target == current)
713 save_and_clear_fpu();
714
715 fprs = task_thread_info(target)->fpsaved[0];
716 if (fprs & FPRS_FEF) {
717 fsr = task_thread_info(target)->xfsr[0];
718 enabled = 1;
719 } else {
720 fsr = 0;
721 enabled = 0;
722 }
723
724 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
725 fpregs,
726 0, 32 * sizeof(u32));
727
728 if (!ret)
729 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
730 32 * sizeof(u32),
731 33 * sizeof(u32));
732 if (!ret)
733 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
734 &fsr,
735 33 * sizeof(u32),
736 34 * sizeof(u32));
737
738 if (!ret) {
739 compat_ulong_t val;
740
741 val = (enabled << 8) | (8 << 16);
742 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
743 &val,
744 34 * sizeof(u32),
745 35 * sizeof(u32));
746 }
747
748 if (!ret)
749 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
750 35 * sizeof(u32), -1);
751
752 return ret;
753 }
754
755 static int fpregs32_set(struct task_struct *target,
756 const struct user_regset *regset,
757 unsigned int pos, unsigned int count,
758 const void *kbuf, const void __user *ubuf)
759 {
760 unsigned long *fpregs = task_thread_info(target)->fpregs;
761 unsigned long fprs;
762 int ret;
763
764 if (target == current)
765 save_and_clear_fpu();
766
767 fprs = task_thread_info(target)->fpsaved[0];
768
769 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
770 fpregs,
771 0, 32 * sizeof(u32));
772 if (!ret)
773 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
774 32 * sizeof(u32),
775 33 * sizeof(u32));
776 if (!ret && count > 0) {
777 compat_ulong_t fsr;
778 unsigned long val;
779
780 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
781 &fsr,
782 33 * sizeof(u32),
783 34 * sizeof(u32));
784 if (!ret) {
785 val = task_thread_info(target)->xfsr[0];
786 val &= 0xffffffff00000000UL;
787 val |= fsr;
788 task_thread_info(target)->xfsr[0] = val;
789 }
790 }
791
792 fprs |= (FPRS_FEF | FPRS_DL);
793 task_thread_info(target)->fpsaved[0] = fprs;
794
795 if (!ret)
796 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
797 34 * sizeof(u32), -1);
798 return ret;
799 }
800
801 static const struct user_regset sparc32_regsets[] = {
802 /* Format is:
803 * G0 --> G7
804 * O0 --> O7
805 * L0 --> L7
806 * I0 --> I7
807 * PSR, PC, nPC, Y, WIM, TBR
808 */
809 [REGSET_GENERAL] = {
810 .core_note_type = NT_PRSTATUS,
811 .n = 38,
812 .size = sizeof(u32), .align = sizeof(u32),
813 .get = genregs32_get, .set = genregs32_set
814 },
815 /* Format is:
816 * F0 --> F31
817 * empty 32-bit word
818 * FSR (32--bit word)
819 * FPU QUEUE COUNT (8-bit char)
820 * FPU QUEUE ENTRYSIZE (8-bit char)
821 * FPU ENABLED (8-bit char)
822 * empty 8-bit char
823 * FPU QUEUE (64 32-bit ints)
824 */
825 [REGSET_FP] = {
826 .core_note_type = NT_PRFPREG,
827 .n = 99,
828 .size = sizeof(u32), .align = sizeof(u32),
829 .get = fpregs32_get, .set = fpregs32_set
830 },
831 };
832
833 static const struct user_regset_view user_sparc32_view = {
834 .name = "sparc", .e_machine = EM_SPARC,
835 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
836 };
837 #endif /* CONFIG_COMPAT */
838
839 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
840 {
841 #ifdef CONFIG_COMPAT
842 if (test_tsk_thread_flag(task, TIF_32BIT))
843 return &user_sparc32_view;
844 #endif
845 return &user_sparc64_view;
846 }
847
848 #ifdef CONFIG_COMPAT
849 struct compat_fps {
850 unsigned int regs[32];
851 unsigned int fsr;
852 unsigned int flags;
853 unsigned int extra;
854 unsigned int fpqd;
855 struct compat_fq {
856 unsigned int insnaddr;
857 unsigned int insn;
858 } fpq[16];
859 };
860
861 long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
862 compat_ulong_t caddr, compat_ulong_t cdata)
863 {
864 const struct user_regset_view *view = task_user_regset_view(current);
865 compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
866 struct pt_regs32 __user *pregs;
867 struct compat_fps __user *fps;
868 unsigned long addr2 = caddr2;
869 unsigned long addr = caddr;
870 unsigned long data = cdata;
871 int ret;
872
873 pregs = (struct pt_regs32 __user *) addr;
874 fps = (struct compat_fps __user *) addr;
875
876 switch (request) {
877 case PTRACE_PEEKUSR:
878 ret = (addr != 0) ? -EIO : 0;
879 break;
880
881 case PTRACE_GETREGS:
882 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
883 32 * sizeof(u32),
884 4 * sizeof(u32),
885 &pregs->psr);
886 if (!ret)
887 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
888 1 * sizeof(u32),
889 15 * sizeof(u32),
890 &pregs->u_regs[0]);
891 break;
892
893 case PTRACE_SETREGS:
894 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
895 32 * sizeof(u32),
896 4 * sizeof(u32),
897 &pregs->psr);
898 if (!ret)
899 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
900 1 * sizeof(u32),
901 15 * sizeof(u32),
902 &pregs->u_regs[0]);
903 break;
904
905 case PTRACE_GETFPREGS:
906 ret = copy_regset_to_user(child, view, REGSET_FP,
907 0 * sizeof(u32),
908 32 * sizeof(u32),
909 &fps->regs[0]);
910 if (!ret)
911 ret = copy_regset_to_user(child, view, REGSET_FP,
912 33 * sizeof(u32),
913 1 * sizeof(u32),
914 &fps->fsr);
915 if (!ret) {
916 if (__put_user(0, &fps->flags) ||
917 __put_user(0, &fps->extra) ||
918 __put_user(0, &fps->fpqd) ||
919 clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
920 ret = -EFAULT;
921 }
922 break;
923
924 case PTRACE_SETFPREGS:
925 ret = copy_regset_from_user(child, view, REGSET_FP,
926 0 * sizeof(u32),
927 32 * sizeof(u32),
928 &fps->regs[0]);
929 if (!ret)
930 ret = copy_regset_from_user(child, view, REGSET_FP,
931 33 * sizeof(u32),
932 1 * sizeof(u32),
933 &fps->fsr);
934 break;
935
936 case PTRACE_READTEXT:
937 case PTRACE_READDATA:
938 ret = ptrace_readdata(child, addr,
939 (char __user *)addr2, data);
940 if (ret == data)
941 ret = 0;
942 else if (ret >= 0)
943 ret = -EIO;
944 break;
945
946 case PTRACE_WRITETEXT:
947 case PTRACE_WRITEDATA:
948 ret = ptrace_writedata(child, (char __user *) addr2,
949 addr, data);
950 if (ret == data)
951 ret = 0;
952 else if (ret >= 0)
953 ret = -EIO;
954 break;
955
956 default:
957 if (request == PTRACE_SPARC_DETACH)
958 request = PTRACE_DETACH;
959 ret = compat_ptrace_request(child, request, addr, data);
960 break;
961 }
962
963 return ret;
964 }
965 #endif /* CONFIG_COMPAT */
966
967 struct fps {
968 unsigned int regs[64];
969 unsigned long fsr;
970 };
971
972 long arch_ptrace(struct task_struct *child, long request,
973 unsigned long addr, unsigned long data)
974 {
975 const struct user_regset_view *view = task_user_regset_view(current);
976 unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
977 struct pt_regs __user *pregs;
978 struct fps __user *fps;
979 void __user *addr2p;
980 int ret;
981
982 pregs = (struct pt_regs __user *) addr;
983 fps = (struct fps __user *) addr;
984 addr2p = (void __user *) addr2;
985
986 switch (request) {
987 case PTRACE_PEEKUSR:
988 ret = (addr != 0) ? -EIO : 0;
989 break;
990
991 case PTRACE_GETREGS64:
992 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
993 1 * sizeof(u64),
994 15 * sizeof(u64),
995 &pregs->u_regs[0]);
996 if (!ret) {
997 /* XXX doesn't handle 'y' register correctly XXX */
998 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
999 32 * sizeof(u64),
1000 4 * sizeof(u64),
1001 &pregs->tstate);
1002 }
1003 break;
1004
1005 case PTRACE_SETREGS64:
1006 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1007 1 * sizeof(u64),
1008 15 * sizeof(u64),
1009 &pregs->u_regs[0]);
1010 if (!ret) {
1011 /* XXX doesn't handle 'y' register correctly XXX */
1012 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1013 32 * sizeof(u64),
1014 4 * sizeof(u64),
1015 &pregs->tstate);
1016 }
1017 break;
1018
1019 case PTRACE_GETFPREGS64:
1020 ret = copy_regset_to_user(child, view, REGSET_FP,
1021 0 * sizeof(u64),
1022 33 * sizeof(u64),
1023 fps);
1024 break;
1025
1026 case PTRACE_SETFPREGS64:
1027 ret = copy_regset_from_user(child, view, REGSET_FP,
1028 0 * sizeof(u64),
1029 33 * sizeof(u64),
1030 fps);
1031 break;
1032
1033 case PTRACE_READTEXT:
1034 case PTRACE_READDATA:
1035 ret = ptrace_readdata(child, addr, addr2p, data);
1036 if (ret == data)
1037 ret = 0;
1038 else if (ret >= 0)
1039 ret = -EIO;
1040 break;
1041
1042 case PTRACE_WRITETEXT:
1043 case PTRACE_WRITEDATA:
1044 ret = ptrace_writedata(child, addr2p, addr, data);
1045 if (ret == data)
1046 ret = 0;
1047 else if (ret >= 0)
1048 ret = -EIO;
1049 break;
1050
1051 default:
1052 if (request == PTRACE_SPARC_DETACH)
1053 request = PTRACE_DETACH;
1054 ret = ptrace_request(child, request, addr, data);
1055 break;
1056 }
1057
1058 return ret;
1059 }
1060
1061 asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1062 {
1063 int ret = 0;
1064
1065 /* do the secure computing check first */
1066 secure_computing(regs->u_regs[UREG_G1]);
1067
1068 if (test_thread_flag(TIF_SYSCALL_TRACE))
1069 ret = tracehook_report_syscall_entry(regs);
1070
1071 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1072 trace_sys_enter(regs, regs->u_regs[UREG_G1]);
1073
1074 if (unlikely(current->audit_context) && !ret)
1075 audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
1076 AUDIT_ARCH_SPARC :
1077 AUDIT_ARCH_SPARC64),
1078 regs->u_regs[UREG_G1],
1079 regs->u_regs[UREG_I0],
1080 regs->u_regs[UREG_I1],
1081 regs->u_regs[UREG_I2],
1082 regs->u_regs[UREG_I3]);
1083
1084 return ret;
1085 }
1086
1087 asmlinkage void syscall_trace_leave(struct pt_regs *regs)
1088 {
1089 #ifdef CONFIG_AUDITSYSCALL
1090 if (unlikely(current->audit_context)) {
1091 unsigned long tstate = regs->tstate;
1092 int result = AUDITSC_SUCCESS;
1093
1094 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
1095 result = AUDITSC_FAILURE;
1096
1097 audit_syscall_exit(result, regs->u_regs[UREG_I0]);
1098 }
1099 #endif
1100 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1101 trace_sys_exit(regs, regs->u_regs[UREG_G1]);
1102
1103 if (test_thread_flag(TIF_SYSCALL_TRACE))
1104 tracehook_report_syscall_exit(regs, 0);
1105 }