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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / sparc64 / kernel / ptrace.c
blobf6c9fc92921d4405693f6f23ab2817bdee3993fa
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/smp_lock.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/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 /* #define ALLOW_INIT_TRACING */
43
44 /*
45 * Called by kernel/ptrace.c when detaching..
46 *
47 * Make sure single step bits etc are not set.
48 */
49 void ptrace_disable(struct task_struct *child)
50 {
51 /* nothing to do */
52 }
53
54 /* To get the necessary page struct, access_process_vm() first calls
55 * get_user_pages(). This has done a flush_dcache_page() on the
56 * accessed page. Then our caller (copy_{to,from}_user_page()) did
57 * to memcpy to read/write the data from that page.
58 *
59 * Now, the only thing we have to do is:
60 * 1) flush the D-cache if it's possible than an illegal alias
61 * has been created
62 * 2) flush the I-cache if this is pre-cheetah and we did a write
63 */
64 void 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 /* If bit 13 of the kernel address we used to access the
77 * user page is the same as the virtual address that page
78 * is mapped to in the user's address space, we can skip the
79 * D-cache flush.
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 : /* no outputs */
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
117 static 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
131 static 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
145 static 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
170 static 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
196 enum sparc_regset {
197 REGSET_GENERAL,
198 REGSET_FP,
199 };
200
201 static 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 /* TSTATE, TPC, TNPC */
228 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
229 &regs->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
251 static 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 /* TSTATE */
285 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
286 &tstate,
287 32 * sizeof(u64),
288 33 * sizeof(u64));
289 if (!ret) {
290 /* Only the condition codes and the "in syscall"
291 * state can be modified in the %tstate register.
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 /* TPC, TNPC */
301 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
302 &regs->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
325 static 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
392 static 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
435 static const struct user_regset sparc64_regsets[] = {
436 /* Format is:
437 * G0 --> G7
438 * O0 --> O7
439 * L0 --> L7
440 * I0 --> I7
441 * TSTATE, TPC, TNPC, Y
442 */
443 [REGSET_GENERAL] = {
444 .core_note_type = NT_PRSTATUS,
445 .n = 36 * sizeof(u64),
446 .size = sizeof(u64), .align = sizeof(u64),
447 .get = genregs64_get, .set = genregs64_set
448 },
449 /* Format is:
450 * F0 --> F63
451 * FSR
452 * GSR
453 * FPRS
454 */
455 [REGSET_FP] = {
456 .core_note_type = NT_PRFPREG,
457 .n = 35 * sizeof(u64),
458 .size = sizeof(u64), .align = sizeof(u64),
459 .get = fpregs64_get, .set = fpregs64_set
460 },
461 };
462
463 static 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
469 static 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++, &reg_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 &reg_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, &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 &reg_window[pos],
526 &reg, sizeof(reg), 0)
527 != sizeof(reg))
528 return -EFAULT;
529 if (access_process_vm(target,
530 (unsigned long) u,
531 &reg, 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: /* PSR */
542 reg = tstate_to_psr(regs->tstate);
543 break;
544 case 33: /* PC */
545 reg = regs->tpc;
546 break;
547 case 34: /* NPC */
548 reg = regs->tnpc;
549 break;
550 case 35: /* Y */
551 reg = regs->y;
552 break;
553 case 36: /* WIM */
554 case 37: /* TBR */
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 }
568 finish:
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
576 static 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++, &reg_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 &reg_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, &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 &reg, sizeof(reg), 0)
636 != sizeof(reg))
637 return -EFAULT;
638 if (access_process_vm(target,
639 (unsigned long)
640 &reg_window[pos],
641 &reg, 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: /* PSR */
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: /* PC */
667 regs->tpc = reg;
668 break;
669 case 34: /* NPC */
670 regs->tnpc = reg;
671 break;
672 case 35: /* Y */
673 regs->y = reg;
674 break;
675 case 36: /* WIM */
676 case 37: /* TBR */
677 break;
678 default:
679 goto finish;
680 }
681
682 pos++;
683 count--;
684 }
685 finish:
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
693 static 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
747 static 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
793 static const struct user_regset sparc32_regsets[] = {
794 /* Format is:
795 * G0 --> G7
796 * O0 --> O7
797 * L0 --> L7
798 * I0 --> I7
799 * PSR, PC, nPC, Y, WIM, TBR
800 */
801 [REGSET_GENERAL] = {
802 .core_note_type = NT_PRSTATUS,
803 .n = 38 * sizeof(u32),
804 .size = sizeof(u32), .align = sizeof(u32),
805 .get = genregs32_get, .set = genregs32_set
806 },
807 /* Format is:
808 * F0 --> F31
809 * empty 32-bit word
810 * FSR (32--bit word)
811 * FPU QUEUE COUNT (8-bit char)
812 * FPU QUEUE ENTRYSIZE (8-bit char)
813 * FPU ENABLED (8-bit char)
814 * empty 8-bit char
815 * FPU QUEUE (64 32-bit ints)
816 */
817 [REGSET_FP] = {
818 .core_note_type = NT_PRFPREG,
819 .n = 99 * sizeof(u32),
820 .size = sizeof(u32), .align = sizeof(u32),
821 .get = fpregs32_get, .set = fpregs32_set
822 },
823 };
824
825 static 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 /* CONFIG_COMPAT */
830
831 const 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
841 struct 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
853 long 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 /* CONFIG_COMPAT */
958
959 struct fps {
960 unsigned int regs[64];
961 unsigned long fsr;
962 };
963
964 long 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 /* XXX doesn't handle 'y' register correctly XXX */
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 /* XXX doesn't handle 'y' register correctly XXX */
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_to_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
1052 asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p)
1053 {
1054 /* do the secure computing check first */
1055 secure_computing(regs->u_regs[UREG_G1]);
1056
1057 if (unlikely(current->audit_context) && syscall_exit_p) {
1058 unsigned long tstate = regs->tstate;
1059 int result = AUDITSC_SUCCESS;
1060
1061 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
1062 result = AUDITSC_FAILURE;
1063
1064 audit_syscall_exit(result, regs->u_regs[UREG_I0]);
1065 }
1066
1067 if (!(current->ptrace & PT_PTRACED))
1068 goto out;
1069
1070 if (!test_thread_flag(TIF_SYSCALL_TRACE))
1071 goto out;
1072
1073 ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
1074 ? 0x80 : 0));
1075
1076 /*
1077 * this isn't the same as continuing with a signal, but it will do
1078 * for normal use. strace only continues with a signal if the
1079 * stopping signal is not SIGTRAP. -brl
1080 */
1081 if (current->exit_code) {
1082 send_sig(current->exit_code, current, 1);
1083 current->exit_code = 0;
1084 }
1085
1086 out:
1087 if (unlikely(current->audit_context) && !syscall_exit_p)
1088 audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
1089 AUDIT_ARCH_SPARC :
1090 AUDIT_ARCH_SPARC64),
1091 regs->u_regs[UREG_G1],
1092 regs->u_regs[UREG_I0],
1093 regs->u_regs[UREG_I1],
1094 regs->u_regs[UREG_I2],
1095 regs->u_regs[UREG_I3]);
1096 }
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