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14#include <linux/kernel.h>
15#include <linux/sched.h>
16#include <linux/sched/task_stack.h>
17#include <linux/mm.h>
18#include <linux/errno.h>
19#include <linux/export.h>
20#include <linux/ptrace.h>
21#include <linux/user.h>
22#include <linux/smp.h>
23#include <linux/security.h>
24#include <linux/seccomp.h>
25#include <linux/audit.h>
26#include <linux/signal.h>
27#include <linux/regset.h>
28#include <linux/tracehook.h>
29#include <trace/syscall.h>
30#include <linux/compat.h>
31#include <linux/elf.h>
32#include <linux/context_tracking.h>
33
34#include <asm/asi.h>
35#include <asm/pgtable.h>
36#include <linux/uaccess.h>
37#include <asm/psrcompat.h>
38#include <asm/visasm.h>
39#include <asm/spitfire.h>
40#include <asm/page.h>
41#include <asm/cpudata.h>
42#include <asm/cacheflush.h>
43
44#define CREATE_TRACE_POINTS
45#include <trace/events/syscalls.h>
46
47#include "entry.h"
48
49
50
51struct pt_regs_offset {
52 const char *name;
53 int offset;
54};
55
56#define REG_OFFSET_NAME(n, r) \
57 {.name = n, .offset = (PT_V9_##r)}
58#define REG_OFFSET_END {.name = NULL, .offset = 0}
59
60static const struct pt_regs_offset regoffset_table[] = {
61 REG_OFFSET_NAME("g0", G0),
62 REG_OFFSET_NAME("g1", G1),
63 REG_OFFSET_NAME("g2", G2),
64 REG_OFFSET_NAME("g3", G3),
65 REG_OFFSET_NAME("g4", G4),
66 REG_OFFSET_NAME("g5", G5),
67 REG_OFFSET_NAME("g6", G6),
68 REG_OFFSET_NAME("g7", G7),
69
70 REG_OFFSET_NAME("i0", I0),
71 REG_OFFSET_NAME("i1", I1),
72 REG_OFFSET_NAME("i2", I2),
73 REG_OFFSET_NAME("i3", I3),
74 REG_OFFSET_NAME("i4", I4),
75 REG_OFFSET_NAME("i5", I5),
76 REG_OFFSET_NAME("i6", I6),
77 REG_OFFSET_NAME("i7", I7),
78
79 REG_OFFSET_NAME("tstate", TSTATE),
80 REG_OFFSET_NAME("pc", TPC),
81 REG_OFFSET_NAME("npc", TNPC),
82 REG_OFFSET_NAME("y", Y),
83 REG_OFFSET_NAME("lr", I7),
84
85 REG_OFFSET_END,
86};
87
88
89
90
91
92
93void ptrace_disable(struct task_struct *child)
94{
95
96}
97
98
99
100
101
102
103
104
105
106
107
108void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
109 unsigned long uaddr, void *kaddr,
110 unsigned long len, int write)
111{
112 BUG_ON(len > PAGE_SIZE);
113
114 if (tlb_type == hypervisor)
115 return;
116
117 preempt_disable();
118
119#ifdef DCACHE_ALIASING_POSSIBLE
120
121
122
123
124
125 if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
126 unsigned long start = __pa(kaddr);
127 unsigned long end = start + len;
128 unsigned long dcache_line_size;
129
130 dcache_line_size = local_cpu_data().dcache_line_size;
131
132 if (tlb_type == spitfire) {
133 for (; start < end; start += dcache_line_size)
134 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
135 } else {
136 start &= ~(dcache_line_size - 1);
137 for (; start < end; start += dcache_line_size)
138 __asm__ __volatile__(
139 "stxa %%g0, [%0] %1\n\t"
140 "membar #Sync"
141 :
142 : "r" (start),
143 "i" (ASI_DCACHE_INVALIDATE));
144 }
145 }
146#endif
147 if (write && tlb_type == spitfire) {
148 unsigned long start = (unsigned long) kaddr;
149 unsigned long end = start + len;
150 unsigned long icache_line_size;
151
152 icache_line_size = local_cpu_data().icache_line_size;
153
154 for (; start < end; start += icache_line_size)
155 flushi(start);
156 }
157
158 preempt_enable();
159}
160EXPORT_SYMBOL_GPL(flush_ptrace_access);
161
162static int get_from_target(struct task_struct *target, unsigned long uaddr,
163 void *kbuf, int len)
164{
165 if (target == current) {
166 if (copy_from_user(kbuf, (void __user *) uaddr, len))
167 return -EFAULT;
168 } else {
169 int len2 = access_process_vm(target, uaddr, kbuf, len,
170 FOLL_FORCE);
171 if (len2 != len)
172 return -EFAULT;
173 }
174 return 0;
175}
176
177static int set_to_target(struct task_struct *target, unsigned long uaddr,
178 void *kbuf, int len)
179{
180 if (target == current) {
181 if (copy_to_user((void __user *) uaddr, kbuf, len))
182 return -EFAULT;
183 } else {
184 int len2 = access_process_vm(target, uaddr, kbuf, len,
185 FOLL_FORCE | FOLL_WRITE);
186 if (len2 != len)
187 return -EFAULT;
188 }
189 return 0;
190}
191
192static int regwindow64_get(struct task_struct *target,
193 const struct pt_regs *regs,
194 struct reg_window *wbuf)
195{
196 unsigned long rw_addr = regs->u_regs[UREG_I6];
197
198 if (!test_thread_64bit_stack(rw_addr)) {
199 struct reg_window32 win32;
200 int i;
201
202 if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
203 return -EFAULT;
204 for (i = 0; i < 8; i++)
205 wbuf->locals[i] = win32.locals[i];
206 for (i = 0; i < 8; i++)
207 wbuf->ins[i] = win32.ins[i];
208 } else {
209 rw_addr += STACK_BIAS;
210 if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
211 return -EFAULT;
212 }
213
214 return 0;
215}
216
217static int regwindow64_set(struct task_struct *target,
218 const struct pt_regs *regs,
219 struct reg_window *wbuf)
220{
221 unsigned long rw_addr = regs->u_regs[UREG_I6];
222
223 if (!test_thread_64bit_stack(rw_addr)) {
224 struct reg_window32 win32;
225 int i;
226
227 for (i = 0; i < 8; i++)
228 win32.locals[i] = wbuf->locals[i];
229 for (i = 0; i < 8; i++)
230 win32.ins[i] = wbuf->ins[i];
231
232 if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
233 return -EFAULT;
234 } else {
235 rw_addr += STACK_BIAS;
236 if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
237 return -EFAULT;
238 }
239
240 return 0;
241}
242
243enum sparc_regset {
244 REGSET_GENERAL,
245 REGSET_FP,
246};
247
248static int genregs64_get(struct task_struct *target,
249 const struct user_regset *regset,
250 unsigned int pos, unsigned int count,
251 void *kbuf, void __user *ubuf)
252{
253 const struct pt_regs *regs = task_pt_regs(target);
254 int ret;
255
256 if (target == current)
257 flushw_user();
258
259 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
260 regs->u_regs,
261 0, 16 * sizeof(u64));
262 if (!ret && count && pos < (32 * sizeof(u64))) {
263 struct reg_window window;
264
265 if (regwindow64_get(target, regs, &window))
266 return -EFAULT;
267 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
268 &window,
269 16 * sizeof(u64),
270 32 * sizeof(u64));
271 }
272
273 if (!ret) {
274
275 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
276 ®s->tstate,
277 32 * sizeof(u64),
278 35 * sizeof(u64));
279 }
280
281 if (!ret) {
282 unsigned long y = regs->y;
283
284 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
285 &y,
286 35 * sizeof(u64),
287 36 * sizeof(u64));
288 }
289
290 if (!ret) {
291 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
292 36 * sizeof(u64), -1);
293
294 }
295 return ret;
296}
297
298static int genregs64_set(struct task_struct *target,
299 const struct user_regset *regset,
300 unsigned int pos, unsigned int count,
301 const void *kbuf, const void __user *ubuf)
302{
303 struct pt_regs *regs = task_pt_regs(target);
304 int ret;
305
306 if (target == current)
307 flushw_user();
308
309 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
310 regs->u_regs,
311 0, 16 * sizeof(u64));
312 if (!ret && count && pos < (32 * sizeof(u64))) {
313 struct reg_window window;
314
315 if (regwindow64_get(target, regs, &window))
316 return -EFAULT;
317
318 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
319 &window,
320 16 * sizeof(u64),
321 32 * sizeof(u64));
322
323 if (!ret &&
324 regwindow64_set(target, regs, &window))
325 return -EFAULT;
326 }
327
328 if (!ret && count > 0) {
329 unsigned long tstate;
330
331
332 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
333 &tstate,
334 32 * sizeof(u64),
335 33 * sizeof(u64));
336 if (!ret) {
337
338
339
340 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
341 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
342 regs->tstate |= tstate;
343 }
344 }
345
346 if (!ret) {
347
348 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
349 ®s->tpc,
350 33 * sizeof(u64),
351 35 * sizeof(u64));
352 }
353
354 if (!ret) {
355 unsigned long y = regs->y;
356
357 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
358 &y,
359 35 * sizeof(u64),
360 36 * sizeof(u64));
361 if (!ret)
362 regs->y = y;
363 }
364
365 if (!ret)
366 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
367 36 * sizeof(u64), -1);
368
369 return ret;
370}
371
372static int fpregs64_get(struct task_struct *target,
373 const struct user_regset *regset,
374 unsigned int pos, unsigned int count,
375 void *kbuf, void __user *ubuf)
376{
377 const unsigned long *fpregs = task_thread_info(target)->fpregs;
378 unsigned long fprs, fsr, gsr;
379 int ret;
380
381 if (target == current)
382 save_and_clear_fpu();
383
384 fprs = task_thread_info(target)->fpsaved[0];
385
386 if (fprs & FPRS_DL)
387 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
388 fpregs,
389 0, 16 * sizeof(u64));
390 else
391 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
392 0,
393 16 * sizeof(u64));
394
395 if (!ret) {
396 if (fprs & FPRS_DU)
397 ret = user_regset_copyout(&pos, &count,
398 &kbuf, &ubuf,
399 fpregs + 16,
400 16 * sizeof(u64),
401 32 * sizeof(u64));
402 else
403 ret = user_regset_copyout_zero(&pos, &count,
404 &kbuf, &ubuf,
405 16 * sizeof(u64),
406 32 * sizeof(u64));
407 }
408
409 if (fprs & FPRS_FEF) {
410 fsr = task_thread_info(target)->xfsr[0];
411 gsr = task_thread_info(target)->gsr[0];
412 } else {
413 fsr = gsr = 0;
414 }
415
416 if (!ret)
417 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
418 &fsr,
419 32 * sizeof(u64),
420 33 * sizeof(u64));
421 if (!ret)
422 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
423 &gsr,
424 33 * sizeof(u64),
425 34 * sizeof(u64));
426 if (!ret)
427 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
428 &fprs,
429 34 * sizeof(u64),
430 35 * sizeof(u64));
431
432 if (!ret)
433 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
434 35 * sizeof(u64), -1);
435
436 return ret;
437}
438
439static int fpregs64_set(struct task_struct *target,
440 const struct user_regset *regset,
441 unsigned int pos, unsigned int count,
442 const void *kbuf, const void __user *ubuf)
443{
444 unsigned long *fpregs = task_thread_info(target)->fpregs;
445 unsigned long fprs;
446 int ret;
447
448 if (target == current)
449 save_and_clear_fpu();
450
451 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
452 fpregs,
453 0, 32 * sizeof(u64));
454 if (!ret)
455 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
456 task_thread_info(target)->xfsr,
457 32 * sizeof(u64),
458 33 * sizeof(u64));
459 if (!ret)
460 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
461 task_thread_info(target)->gsr,
462 33 * sizeof(u64),
463 34 * sizeof(u64));
464
465 fprs = task_thread_info(target)->fpsaved[0];
466 if (!ret && count > 0) {
467 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
468 &fprs,
469 34 * sizeof(u64),
470 35 * sizeof(u64));
471 }
472
473 fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
474 task_thread_info(target)->fpsaved[0] = fprs;
475
476 if (!ret)
477 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
478 35 * sizeof(u64), -1);
479 return ret;
480}
481
482static const struct user_regset sparc64_regsets[] = {
483
484
485
486
487
488
489
490 [REGSET_GENERAL] = {
491 .core_note_type = NT_PRSTATUS,
492 .n = 36,
493 .size = sizeof(u64), .align = sizeof(u64),
494 .get = genregs64_get, .set = genregs64_set
495 },
496
497
498
499
500
501
502 [REGSET_FP] = {
503 .core_note_type = NT_PRFPREG,
504 .n = 35,
505 .size = sizeof(u64), .align = sizeof(u64),
506 .get = fpregs64_get, .set = fpregs64_set
507 },
508};
509
510static const struct user_regset_view user_sparc64_view = {
511 .name = "sparc64", .e_machine = EM_SPARCV9,
512 .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
513};
514
515#ifdef CONFIG_COMPAT
516static int genregs32_get(struct task_struct *target,
517 const struct user_regset *regset,
518 unsigned int pos, unsigned int count,
519 void *kbuf, void __user *ubuf)
520{
521 const struct pt_regs *regs = task_pt_regs(target);
522 compat_ulong_t __user *reg_window;
523 compat_ulong_t *k = kbuf;
524 compat_ulong_t __user *u = ubuf;
525 compat_ulong_t reg;
526
527 if (target == current)
528 flushw_user();
529
530 pos /= sizeof(reg);
531 count /= sizeof(reg);
532
533 if (kbuf) {
534 for (; count > 0 && pos < 16; count--)
535 *k++ = regs->u_regs[pos++];
536
537 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
538 reg_window -= 16;
539 if (target == current) {
540 for (; count > 0 && pos < 32; count--) {
541 if (get_user(*k++, ®_window[pos++]))
542 return -EFAULT;
543 }
544 } else {
545 for (; count > 0 && pos < 32; count--) {
546 if (access_process_vm(target,
547 (unsigned long)
548 ®_window[pos],
549 k, sizeof(*k),
550 FOLL_FORCE)
551 != sizeof(*k))
552 return -EFAULT;
553 k++;
554 pos++;
555 }
556 }
557 } else {
558 for (; count > 0 && pos < 16; count--) {
559 if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
560 return -EFAULT;
561 }
562
563 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
564 reg_window -= 16;
565 if (target == current) {
566 for (; count > 0 && pos < 32; count--) {
567 if (get_user(reg, ®_window[pos++]) ||
568 put_user(reg, u++))
569 return -EFAULT;
570 }
571 } else {
572 for (; count > 0 && pos < 32; count--) {
573 if (access_process_vm(target,
574 (unsigned long)
575 ®_window[pos],
576 ®, sizeof(reg),
577 FOLL_FORCE)
578 != sizeof(reg))
579 return -EFAULT;
580 if (access_process_vm(target,
581 (unsigned long) u,
582 ®, sizeof(reg),
583 FOLL_FORCE | FOLL_WRITE)
584 != sizeof(reg))
585 return -EFAULT;
586 pos++;
587 u++;
588 }
589 }
590 }
591 while (count > 0) {
592 switch (pos) {
593 case 32:
594 reg = tstate_to_psr(regs->tstate);
595 break;
596 case 33:
597 reg = regs->tpc;
598 break;
599 case 34:
600 reg = regs->tnpc;
601 break;
602 case 35:
603 reg = regs->y;
604 break;
605 case 36:
606 case 37:
607 reg = 0;
608 break;
609 default:
610 goto finish;
611 }
612
613 if (kbuf)
614 *k++ = reg;
615 else if (put_user(reg, u++))
616 return -EFAULT;
617 pos++;
618 count--;
619 }
620finish:
621 pos *= sizeof(reg);
622 count *= sizeof(reg);
623
624 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
625 38 * sizeof(reg), -1);
626}
627
628static int genregs32_set(struct task_struct *target,
629 const struct user_regset *regset,
630 unsigned int pos, unsigned int count,
631 const void *kbuf, const void __user *ubuf)
632{
633 struct pt_regs *regs = task_pt_regs(target);
634 compat_ulong_t __user *reg_window;
635 const compat_ulong_t *k = kbuf;
636 const compat_ulong_t __user *u = ubuf;
637 compat_ulong_t reg;
638
639 if (target == current)
640 flushw_user();
641
642 pos /= sizeof(reg);
643 count /= sizeof(reg);
644
645 if (kbuf) {
646 for (; count > 0 && pos < 16; count--)
647 regs->u_regs[pos++] = *k++;
648
649 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
650 reg_window -= 16;
651 if (target == current) {
652 for (; count > 0 && pos < 32; count--) {
653 if (put_user(*k++, ®_window[pos++]))
654 return -EFAULT;
655 }
656 } else {
657 for (; count > 0 && pos < 32; count--) {
658 if (access_process_vm(target,
659 (unsigned long)
660 ®_window[pos],
661 (void *) k,
662 sizeof(*k),
663 FOLL_FORCE | FOLL_WRITE)
664 != sizeof(*k))
665 return -EFAULT;
666 k++;
667 pos++;
668 }
669 }
670 } else {
671 for (; count > 0 && pos < 16; count--) {
672 if (get_user(reg, u++))
673 return -EFAULT;
674 regs->u_regs[pos++] = reg;
675 }
676
677 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
678 reg_window -= 16;
679 if (target == current) {
680 for (; count > 0 && pos < 32; count--) {
681 if (get_user(reg, u++) ||
682 put_user(reg, ®_window[pos++]))
683 return -EFAULT;
684 }
685 } else {
686 for (; count > 0 && pos < 32; count--) {
687 if (access_process_vm(target,
688 (unsigned long)
689 u,
690 ®, sizeof(reg),
691 FOLL_FORCE)
692 != sizeof(reg))
693 return -EFAULT;
694 if (access_process_vm(target,
695 (unsigned long)
696 ®_window[pos],
697 ®, sizeof(reg),
698 FOLL_FORCE | FOLL_WRITE)
699 != sizeof(reg))
700 return -EFAULT;
701 pos++;
702 u++;
703 }
704 }
705 }
706 while (count > 0) {
707 unsigned long tstate;
708
709 if (kbuf)
710 reg = *k++;
711 else if (get_user(reg, u++))
712 return -EFAULT;
713
714 switch (pos) {
715 case 32:
716 tstate = regs->tstate;
717 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
718 tstate |= psr_to_tstate_icc(reg);
719 if (reg & PSR_SYSCALL)
720 tstate |= TSTATE_SYSCALL;
721 regs->tstate = tstate;
722 break;
723 case 33:
724 regs->tpc = reg;
725 break;
726 case 34:
727 regs->tnpc = reg;
728 break;
729 case 35:
730 regs->y = reg;
731 break;
732 case 36:
733 case 37:
734 break;
735 default:
736 goto finish;
737 }
738
739 pos++;
740 count--;
741 }
742finish:
743 pos *= sizeof(reg);
744 count *= sizeof(reg);
745
746 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
747 38 * sizeof(reg), -1);
748}
749
750static int fpregs32_get(struct task_struct *target,
751 const struct user_regset *regset,
752 unsigned int pos, unsigned int count,
753 void *kbuf, void __user *ubuf)
754{
755 const unsigned long *fpregs = task_thread_info(target)->fpregs;
756 compat_ulong_t enabled;
757 unsigned long fprs;
758 compat_ulong_t fsr;
759 int ret = 0;
760
761 if (target == current)
762 save_and_clear_fpu();
763
764 fprs = task_thread_info(target)->fpsaved[0];
765 if (fprs & FPRS_FEF) {
766 fsr = task_thread_info(target)->xfsr[0];
767 enabled = 1;
768 } else {
769 fsr = 0;
770 enabled = 0;
771 }
772
773 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
774 fpregs,
775 0, 32 * sizeof(u32));
776
777 if (!ret)
778 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
779 32 * sizeof(u32),
780 33 * sizeof(u32));
781 if (!ret)
782 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
783 &fsr,
784 33 * sizeof(u32),
785 34 * sizeof(u32));
786
787 if (!ret) {
788 compat_ulong_t val;
789
790 val = (enabled << 8) | (8 << 16);
791 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
792 &val,
793 34 * sizeof(u32),
794 35 * sizeof(u32));
795 }
796
797 if (!ret)
798 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
799 35 * sizeof(u32), -1);
800
801 return ret;
802}
803
804static int fpregs32_set(struct task_struct *target,
805 const struct user_regset *regset,
806 unsigned int pos, unsigned int count,
807 const void *kbuf, const void __user *ubuf)
808{
809 unsigned long *fpregs = task_thread_info(target)->fpregs;
810 unsigned long fprs;
811 int ret;
812
813 if (target == current)
814 save_and_clear_fpu();
815
816 fprs = task_thread_info(target)->fpsaved[0];
817
818 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
819 fpregs,
820 0, 32 * sizeof(u32));
821 if (!ret)
822 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
823 32 * sizeof(u32),
824 33 * sizeof(u32));
825 if (!ret && count > 0) {
826 compat_ulong_t fsr;
827 unsigned long val;
828
829 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
830 &fsr,
831 33 * sizeof(u32),
832 34 * sizeof(u32));
833 if (!ret) {
834 val = task_thread_info(target)->xfsr[0];
835 val &= 0xffffffff00000000UL;
836 val |= fsr;
837 task_thread_info(target)->xfsr[0] = val;
838 }
839 }
840
841 fprs |= (FPRS_FEF | FPRS_DL);
842 task_thread_info(target)->fpsaved[0] = fprs;
843
844 if (!ret)
845 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
846 34 * sizeof(u32), -1);
847 return ret;
848}
849
850static const struct user_regset sparc32_regsets[] = {
851
852
853
854
855
856
857
858 [REGSET_GENERAL] = {
859 .core_note_type = NT_PRSTATUS,
860 .n = 38,
861 .size = sizeof(u32), .align = sizeof(u32),
862 .get = genregs32_get, .set = genregs32_set
863 },
864
865
866
867
868
869
870
871
872
873
874 [REGSET_FP] = {
875 .core_note_type = NT_PRFPREG,
876 .n = 99,
877 .size = sizeof(u32), .align = sizeof(u32),
878 .get = fpregs32_get, .set = fpregs32_set
879 },
880};
881
882static const struct user_regset_view user_sparc32_view = {
883 .name = "sparc", .e_machine = EM_SPARC,
884 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
885};
886#endif
887
888const struct user_regset_view *task_user_regset_view(struct task_struct *task)
889{
890#ifdef CONFIG_COMPAT
891 if (test_tsk_thread_flag(task, TIF_32BIT))
892 return &user_sparc32_view;
893#endif
894 return &user_sparc64_view;
895}
896
897#ifdef CONFIG_COMPAT
898struct compat_fps {
899 unsigned int regs[32];
900 unsigned int fsr;
901 unsigned int flags;
902 unsigned int extra;
903 unsigned int fpqd;
904 struct compat_fq {
905 unsigned int insnaddr;
906 unsigned int insn;
907 } fpq[16];
908};
909
910long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
911 compat_ulong_t caddr, compat_ulong_t cdata)
912{
913 const struct user_regset_view *view = task_user_regset_view(current);
914 compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
915 struct pt_regs32 __user *pregs;
916 struct compat_fps __user *fps;
917 unsigned long addr2 = caddr2;
918 unsigned long addr = caddr;
919 unsigned long data = cdata;
920 int ret;
921
922 pregs = (struct pt_regs32 __user *) addr;
923 fps = (struct compat_fps __user *) addr;
924
925 switch (request) {
926 case PTRACE_PEEKUSR:
927 ret = (addr != 0) ? -EIO : 0;
928 break;
929
930 case PTRACE_GETREGS:
931 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
932 32 * sizeof(u32),
933 4 * sizeof(u32),
934 &pregs->psr);
935 if (!ret)
936 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
937 1 * sizeof(u32),
938 15 * sizeof(u32),
939 &pregs->u_regs[0]);
940 break;
941
942 case PTRACE_SETREGS:
943 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
944 32 * sizeof(u32),
945 4 * sizeof(u32),
946 &pregs->psr);
947 if (!ret)
948 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
949 1 * sizeof(u32),
950 15 * sizeof(u32),
951 &pregs->u_regs[0]);
952 break;
953
954 case PTRACE_GETFPREGS:
955 ret = copy_regset_to_user(child, view, REGSET_FP,
956 0 * sizeof(u32),
957 32 * sizeof(u32),
958 &fps->regs[0]);
959 if (!ret)
960 ret = copy_regset_to_user(child, view, REGSET_FP,
961 33 * sizeof(u32),
962 1 * sizeof(u32),
963 &fps->fsr);
964 if (!ret) {
965 if (__put_user(0, &fps->flags) ||
966 __put_user(0, &fps->extra) ||
967 __put_user(0, &fps->fpqd) ||
968 clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
969 ret = -EFAULT;
970 }
971 break;
972
973 case PTRACE_SETFPREGS:
974 ret = copy_regset_from_user(child, view, REGSET_FP,
975 0 * sizeof(u32),
976 32 * sizeof(u32),
977 &fps->regs[0]);
978 if (!ret)
979 ret = copy_regset_from_user(child, view, REGSET_FP,
980 33 * sizeof(u32),
981 1 * sizeof(u32),
982 &fps->fsr);
983 break;
984
985 case PTRACE_READTEXT:
986 case PTRACE_READDATA:
987 ret = ptrace_readdata(child, addr,
988 (char __user *)addr2, data);
989 if (ret == data)
990 ret = 0;
991 else if (ret >= 0)
992 ret = -EIO;
993 break;
994
995 case PTRACE_WRITETEXT:
996 case PTRACE_WRITEDATA:
997 ret = ptrace_writedata(child, (char __user *) addr2,
998 addr, data);
999 if (ret == data)
1000 ret = 0;
1001 else if (ret >= 0)
1002 ret = -EIO;
1003 break;
1004
1005 default:
1006 if (request == PTRACE_SPARC_DETACH)
1007 request = PTRACE_DETACH;
1008 ret = compat_ptrace_request(child, request, addr, data);
1009 break;
1010 }
1011
1012 return ret;
1013}
1014#endif
1015
1016struct fps {
1017 unsigned int regs[64];
1018 unsigned long fsr;
1019};
1020
1021long arch_ptrace(struct task_struct *child, long request,
1022 unsigned long addr, unsigned long data)
1023{
1024 const struct user_regset_view *view = task_user_regset_view(current);
1025 unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
1026 struct pt_regs __user *pregs;
1027 struct fps __user *fps;
1028 void __user *addr2p;
1029 int ret;
1030
1031 pregs = (struct pt_regs __user *) addr;
1032 fps = (struct fps __user *) addr;
1033 addr2p = (void __user *) addr2;
1034
1035 switch (request) {
1036 case PTRACE_PEEKUSR:
1037 ret = (addr != 0) ? -EIO : 0;
1038 break;
1039
1040 case PTRACE_GETREGS64:
1041 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
1042 1 * sizeof(u64),
1043 15 * sizeof(u64),
1044 &pregs->u_regs[0]);
1045 if (!ret) {
1046
1047 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
1048 32 * sizeof(u64),
1049 4 * sizeof(u64),
1050 &pregs->tstate);
1051 }
1052 break;
1053
1054 case PTRACE_SETREGS64:
1055 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1056 1 * sizeof(u64),
1057 15 * sizeof(u64),
1058 &pregs->u_regs[0]);
1059 if (!ret) {
1060
1061 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1062 32 * sizeof(u64),
1063 4 * sizeof(u64),
1064 &pregs->tstate);
1065 }
1066 break;
1067
1068 case PTRACE_GETFPREGS64:
1069 ret = copy_regset_to_user(child, view, REGSET_FP,
1070 0 * sizeof(u64),
1071 33 * sizeof(u64),
1072 fps);
1073 break;
1074
1075 case PTRACE_SETFPREGS64:
1076 ret = copy_regset_from_user(child, view, REGSET_FP,
1077 0 * sizeof(u64),
1078 33 * sizeof(u64),
1079 fps);
1080 break;
1081
1082 case PTRACE_READTEXT:
1083 case PTRACE_READDATA:
1084 ret = ptrace_readdata(child, addr, addr2p, data);
1085 if (ret == data)
1086 ret = 0;
1087 else if (ret >= 0)
1088 ret = -EIO;
1089 break;
1090
1091 case PTRACE_WRITETEXT:
1092 case PTRACE_WRITEDATA:
1093 ret = ptrace_writedata(child, addr2p, addr, data);
1094 if (ret == data)
1095 ret = 0;
1096 else if (ret >= 0)
1097 ret = -EIO;
1098 break;
1099
1100 default:
1101 if (request == PTRACE_SPARC_DETACH)
1102 request = PTRACE_DETACH;
1103 ret = ptrace_request(child, request, addr, data);
1104 break;
1105 }
1106
1107 return ret;
1108}
1109
1110asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1111{
1112 int ret = 0;
1113
1114
1115 secure_computing_strict(regs->u_regs[UREG_G1]);
1116
1117 if (test_thread_flag(TIF_NOHZ))
1118 user_exit();
1119
1120 if (test_thread_flag(TIF_SYSCALL_TRACE))
1121 ret = tracehook_report_syscall_entry(regs);
1122
1123 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1124 trace_sys_enter(regs, regs->u_regs[UREG_G1]);
1125
1126 audit_syscall_entry(regs->u_regs[UREG_G1], regs->u_regs[UREG_I0],
1127 regs->u_regs[UREG_I1], regs->u_regs[UREG_I2],
1128 regs->u_regs[UREG_I3]);
1129
1130 return ret;
1131}
1132
1133asmlinkage void syscall_trace_leave(struct pt_regs *regs)
1134{
1135 if (test_thread_flag(TIF_NOHZ))
1136 user_exit();
1137
1138 audit_syscall_exit(regs);
1139
1140 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1141 trace_sys_exit(regs, regs->u_regs[UREG_I0]);
1142
1143 if (test_thread_flag(TIF_SYSCALL_TRACE))
1144 tracehook_report_syscall_exit(regs, 0);
1145
1146 if (test_thread_flag(TIF_NOHZ))
1147 user_enter();
1148}
1149
1150
1151
1152
1153
1154
1155
1156
1157int regs_query_register_offset(const char *name)
1158{
1159 const struct pt_regs_offset *roff;
1160
1161 for (roff = regoffset_table; roff->name != NULL; roff++)
1162 if (!strcmp(roff->name, name))
1163 return roff->offset;
1164 return -EINVAL;
1165}
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175static inline int regs_within_kernel_stack(struct pt_regs *regs,
1176 unsigned long addr)
1177{
1178 unsigned long ksp = kernel_stack_pointer(regs) + STACK_BIAS;
1179 return ((addr & ~(THREAD_SIZE - 1)) ==
1180 (ksp & ~(THREAD_SIZE - 1)));
1181}
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
1193{
1194 unsigned long ksp = kernel_stack_pointer(regs) + STACK_BIAS;
1195 unsigned long *addr = (unsigned long *)ksp;
1196 addr += n;
1197 if (regs_within_kernel_stack(regs, (unsigned long)addr))
1198 return *addr;
1199 else
1200 return 0;
1201}
1202
