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