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