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x86/efi: Enforce CONFIG_RELOCATABLE for EFI boot stub
[linux/fpc-iii.git] / arch / sparc / kernel / ptrace_64.c
blob773c1f2983ce3282c59a8f93efd62663218e741f
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/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
31 #include <asm/asi.h>
32 #include <asm/pgtable.h>
33 #include <asm/uaccess.h>
34 #include <asm/psrcompat.h>
35 #include <asm/visasm.h>
36 #include <asm/spitfire.h>
37 #include <asm/page.h>
38 #include <asm/cpudata.h>
39 #include <asm/cacheflush.h>
40
41 #define CREATE_TRACE_POINTS
42 #include <trace/events/syscalls.h>
43
44 #include "entry.h"
45
46 /* #define ALLOW_INIT_TRACING */
47
48 /*
49 * Called by kernel/ptrace.c when detaching..
50 *
51 * Make sure single step bits etc are not set.
52 */
53 void ptrace_disable(struct task_struct *child)
54 {
55 /* nothing to do */
56 }
57
58 /* To get the necessary page struct, access_process_vm() first calls
59 * get_user_pages(). This has done a flush_dcache_page() on the
60 * accessed page. Then our caller (copy_{to,from}_user_page()) did
61 * to memcpy to read/write the data from that page.
62 *
63 * Now, the only thing we have to do is:
64 * 1) flush the D-cache if it's possible than an illegal alias
65 * has been created
66 * 2) flush the I-cache if this is pre-cheetah and we did a write
67 */
68 void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
69 unsigned long uaddr, void *kaddr,
70 unsigned long len, int write)
71 {
72 BUG_ON(len > PAGE_SIZE);
73
74 if (tlb_type == hypervisor)
75 return;
76
77 preempt_disable();
78
79 #ifdef DCACHE_ALIASING_POSSIBLE
80 /* If bit 13 of the kernel address we used to access the
81 * user page is the same as the virtual address that page
82 * is mapped to in the user's address space, we can skip the
83 * D-cache flush.
84 */
85 if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
86 unsigned long start = __pa(kaddr);
87 unsigned long end = start + len;
88 unsigned long dcache_line_size;
89
90 dcache_line_size = local_cpu_data().dcache_line_size;
91
92 if (tlb_type == spitfire) {
93 for (; start < end; start += dcache_line_size)
94 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
95 } else {
96 start &= ~(dcache_line_size - 1);
97 for (; start < end; start += dcache_line_size)
98 __asm__ __volatile__(
99 "stxa %%g0, [%0] %1\n\t"
100 "membar #Sync"
101 : /* no outputs */
102 : "r" (start),
103 "i" (ASI_DCACHE_INVALIDATE));
104 }
105 }
106 #endif
107 if (write && tlb_type == spitfire) {
108 unsigned long start = (unsigned long) kaddr;
109 unsigned long end = start + len;
110 unsigned long icache_line_size;
111
112 icache_line_size = local_cpu_data().icache_line_size;
113
114 for (; start < end; start += icache_line_size)
115 flushi(start);
116 }
117
118 preempt_enable();
119 }
120 EXPORT_SYMBOL_GPL(flush_ptrace_access);
121
122 static int get_from_target(struct task_struct *target, unsigned long uaddr,
123 void *kbuf, int len)
124 {
125 if (target == current) {
126 if (copy_from_user(kbuf, (void __user *) uaddr, len))
127 return -EFAULT;
128 } else {
129 int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
130 if (len2 != len)
131 return -EFAULT;
132 }
133 return 0;
134 }
135
136 static int set_to_target(struct task_struct *target, unsigned long uaddr,
137 void *kbuf, int len)
138 {
139 if (target == current) {
140 if (copy_to_user((void __user *) uaddr, kbuf, len))
141 return -EFAULT;
142 } else {
143 int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
144 if (len2 != len)
145 return -EFAULT;
146 }
147 return 0;
148 }
149
150 static int regwindow64_get(struct task_struct *target,
151 const struct pt_regs *regs,
152 struct reg_window *wbuf)
153 {
154 unsigned long rw_addr = regs->u_regs[UREG_I6];
155
156 if (!test_thread_64bit_stack(rw_addr)) {
157 struct reg_window32 win32;
158 int i;
159
160 if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
161 return -EFAULT;
162 for (i = 0; i < 8; i++)
163 wbuf->locals[i] = win32.locals[i];
164 for (i = 0; i < 8; i++)
165 wbuf->ins[i] = win32.ins[i];
166 } else {
167 rw_addr += STACK_BIAS;
168 if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
169 return -EFAULT;
170 }
171
172 return 0;
173 }
174
175 static int regwindow64_set(struct task_struct *target,
176 const struct pt_regs *regs,
177 struct reg_window *wbuf)
178 {
179 unsigned long rw_addr = regs->u_regs[UREG_I6];
180
181 if (!test_thread_64bit_stack(rw_addr)) {
182 struct reg_window32 win32;
183 int i;
184
185 for (i = 0; i < 8; i++)
186 win32.locals[i] = wbuf->locals[i];
187 for (i = 0; i < 8; i++)
188 win32.ins[i] = wbuf->ins[i];
189
190 if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
191 return -EFAULT;
192 } else {
193 rw_addr += STACK_BIAS;
194 if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
195 return -EFAULT;
196 }
197
198 return 0;
199 }
200
201 enum sparc_regset {
202 REGSET_GENERAL,
203 REGSET_FP,
204 };
205
206 static int genregs64_get(struct task_struct *target,
207 const struct user_regset *regset,
208 unsigned int pos, unsigned int count,
209 void *kbuf, void __user *ubuf)
210 {
211 const struct pt_regs *regs = task_pt_regs(target);
212 int ret;
213
214 if (target == current)
215 flushw_user();
216
217 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
218 regs->u_regs,
219 0, 16 * sizeof(u64));
220 if (!ret && count && pos < (32 * sizeof(u64))) {
221 struct reg_window window;
222
223 if (regwindow64_get(target, regs, &window))
224 return -EFAULT;
225 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
226 &window,
227 16 * sizeof(u64),
228 32 * sizeof(u64));
229 }
230
231 if (!ret) {
232 /* TSTATE, TPC, TNPC */
233 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
234 &regs->tstate,
235 32 * sizeof(u64),
236 35 * sizeof(u64));
237 }
238
239 if (!ret) {
240 unsigned long y = regs->y;
241
242 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
243 &y,
244 35 * sizeof(u64),
245 36 * sizeof(u64));
246 }
247
248 if (!ret) {
249 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
250 36 * sizeof(u64), -1);
251
252 }
253 return ret;
254 }
255
256 static int genregs64_set(struct task_struct *target,
257 const struct user_regset *regset,
258 unsigned int pos, unsigned int count,
259 const void *kbuf, const void __user *ubuf)
260 {
261 struct pt_regs *regs = task_pt_regs(target);
262 int ret;
263
264 if (target == current)
265 flushw_user();
266
267 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
268 regs->u_regs,
269 0, 16 * sizeof(u64));
270 if (!ret && count && pos < (32 * sizeof(u64))) {
271 struct reg_window window;
272
273 if (regwindow64_get(target, regs, &window))
274 return -EFAULT;
275
276 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
277 &window,
278 16 * sizeof(u64),
279 32 * sizeof(u64));
280
281 if (!ret &&
282 regwindow64_set(target, regs, &window))
283 return -EFAULT;
284 }
285
286 if (!ret && count > 0) {
287 unsigned long tstate;
288
289 /* TSTATE */
290 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
291 &tstate,
292 32 * sizeof(u64),
293 33 * sizeof(u64));
294 if (!ret) {
295 /* Only the condition codes and the "in syscall"
296 * state can be modified in the %tstate register.
297 */
298 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
299 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
300 regs->tstate |= tstate;
301 }
302 }
303
304 if (!ret) {
305 /* TPC, TNPC */
306 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
307 &regs->tpc,
308 33 * sizeof(u64),
309 35 * sizeof(u64));
310 }
311
312 if (!ret) {
313 unsigned long y;
314
315 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
316 &y,
317 35 * sizeof(u64),
318 36 * sizeof(u64));
319 if (!ret)
320 regs->y = y;
321 }
322
323 if (!ret)
324 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
325 36 * sizeof(u64), -1);
326
327 return ret;
328 }
329
330 static int fpregs64_get(struct task_struct *target,
331 const struct user_regset *regset,
332 unsigned int pos, unsigned int count,
333 void *kbuf, void __user *ubuf)
334 {
335 const unsigned long *fpregs = task_thread_info(target)->fpregs;
336 unsigned long fprs, fsr, gsr;
337 int ret;
338
339 if (target == current)
340 save_and_clear_fpu();
341
342 fprs = task_thread_info(target)->fpsaved[0];
343
344 if (fprs & FPRS_DL)
345 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
346 fpregs,
347 0, 16 * sizeof(u64));
348 else
349 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
350 0,
351 16 * sizeof(u64));
352
353 if (!ret) {
354 if (fprs & FPRS_DU)
355 ret = user_regset_copyout(&pos, &count,
356 &kbuf, &ubuf,
357 fpregs + 16,
358 16 * sizeof(u64),
359 32 * sizeof(u64));
360 else
361 ret = user_regset_copyout_zero(&pos, &count,
362 &kbuf, &ubuf,
363 16 * sizeof(u64),
364 32 * sizeof(u64));
365 }
366
367 if (fprs & FPRS_FEF) {
368 fsr = task_thread_info(target)->xfsr[0];
369 gsr = task_thread_info(target)->gsr[0];
370 } else {
371 fsr = gsr = 0;
372 }
373
374 if (!ret)
375 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
376 &fsr,
377 32 * sizeof(u64),
378 33 * sizeof(u64));
379 if (!ret)
380 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
381 &gsr,
382 33 * sizeof(u64),
383 34 * sizeof(u64));
384 if (!ret)
385 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
386 &fprs,
387 34 * sizeof(u64),
388 35 * sizeof(u64));
389
390 if (!ret)
391 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
392 35 * sizeof(u64), -1);
393
394 return ret;
395 }
396
397 static int fpregs64_set(struct task_struct *target,
398 const struct user_regset *regset,
399 unsigned int pos, unsigned int count,
400 const void *kbuf, const void __user *ubuf)
401 {
402 unsigned long *fpregs = task_thread_info(target)->fpregs;
403 unsigned long fprs;
404 int ret;
405
406 if (target == current)
407 save_and_clear_fpu();
408
409 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
410 fpregs,
411 0, 32 * sizeof(u64));
412 if (!ret)
413 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
414 task_thread_info(target)->xfsr,
415 32 * sizeof(u64),
416 33 * sizeof(u64));
417 if (!ret)
418 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
419 task_thread_info(target)->gsr,
420 33 * sizeof(u64),
421 34 * sizeof(u64));
422
423 fprs = task_thread_info(target)->fpsaved[0];
424 if (!ret && count > 0) {
425 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
426 &fprs,
427 34 * sizeof(u64),
428 35 * sizeof(u64));
429 }
430
431 fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
432 task_thread_info(target)->fpsaved[0] = fprs;
433
434 if (!ret)
435 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
436 35 * sizeof(u64), -1);
437 return ret;
438 }
439
440 static const struct user_regset sparc64_regsets[] = {
441 /* Format is:
442 * G0 --> G7
443 * O0 --> O7
444 * L0 --> L7
445 * I0 --> I7
446 * TSTATE, TPC, TNPC, Y
447 */
448 [REGSET_GENERAL] = {
449 .core_note_type = NT_PRSTATUS,
450 .n = 36,
451 .size = sizeof(u64), .align = sizeof(u64),
452 .get = genregs64_get, .set = genregs64_set
453 },
454 /* Format is:
455 * F0 --> F63
456 * FSR
457 * GSR
458 * FPRS
459 */
460 [REGSET_FP] = {
461 .core_note_type = NT_PRFPREG,
462 .n = 35,
463 .size = sizeof(u64), .align = sizeof(u64),
464 .get = fpregs64_get, .set = fpregs64_set
465 },
466 };
467
468 static const struct user_regset_view user_sparc64_view = {
469 .name = "sparc64", .e_machine = EM_SPARCV9,
470 .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
471 };
472
473 #ifdef CONFIG_COMPAT
474 static int genregs32_get(struct task_struct *target,
475 const struct user_regset *regset,
476 unsigned int pos, unsigned int count,
477 void *kbuf, void __user *ubuf)
478 {
479 const struct pt_regs *regs = task_pt_regs(target);
480 compat_ulong_t __user *reg_window;
481 compat_ulong_t *k = kbuf;
482 compat_ulong_t __user *u = ubuf;
483 compat_ulong_t reg;
484
485 if (target == current)
486 flushw_user();
487
488 pos /= sizeof(reg);
489 count /= sizeof(reg);
490
491 if (kbuf) {
492 for (; count > 0 && pos < 16; count--)
493 *k++ = regs->u_regs[pos++];
494
495 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
496 reg_window -= 16;
497 if (target == current) {
498 for (; count > 0 && pos < 32; count--) {
499 if (get_user(*k++, &reg_window[pos++]))
500 return -EFAULT;
501 }
502 } else {
503 for (; count > 0 && pos < 32; count--) {
504 if (access_process_vm(target,
505 (unsigned long)
506 &reg_window[pos],
507 k, sizeof(*k), 0)
508 != sizeof(*k))
509 return -EFAULT;
510 k++;
511 pos++;
512 }
513 }
514 } else {
515 for (; count > 0 && pos < 16; count--) {
516 if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
517 return -EFAULT;
518 }
519
520 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
521 reg_window -= 16;
522 if (target == current) {
523 for (; count > 0 && pos < 32; count--) {
524 if (get_user(reg, &reg_window[pos++]) ||
525 put_user(reg, u++))
526 return -EFAULT;
527 }
528 } else {
529 for (; count > 0 && pos < 32; count--) {
530 if (access_process_vm(target,
531 (unsigned long)
532 &reg_window[pos],
533 &reg, sizeof(reg), 0)
534 != sizeof(reg))
535 return -EFAULT;
536 if (access_process_vm(target,
537 (unsigned long) u,
538 &reg, sizeof(reg), 1)
539 != sizeof(reg))
540 return -EFAULT;
541 pos++;
542 u++;
543 }
544 }
545 }
546 while (count > 0) {
547 switch (pos) {
548 case 32: /* PSR */
549 reg = tstate_to_psr(regs->tstate);
550 break;
551 case 33: /* PC */
552 reg = regs->tpc;
553 break;
554 case 34: /* NPC */
555 reg = regs->tnpc;
556 break;
557 case 35: /* Y */
558 reg = regs->y;
559 break;
560 case 36: /* WIM */
561 case 37: /* TBR */
562 reg = 0;
563 break;
564 default:
565 goto finish;
566 }
567
568 if (kbuf)
569 *k++ = reg;
570 else if (put_user(reg, u++))
571 return -EFAULT;
572 pos++;
573 count--;
574 }
575 finish:
576 pos *= sizeof(reg);
577 count *= sizeof(reg);
578
579 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
580 38 * sizeof(reg), -1);
581 }
582
583 static int genregs32_set(struct task_struct *target,
584 const struct user_regset *regset,
585 unsigned int pos, unsigned int count,
586 const void *kbuf, const void __user *ubuf)
587 {
588 struct pt_regs *regs = task_pt_regs(target);
589 compat_ulong_t __user *reg_window;
590 const compat_ulong_t *k = kbuf;
591 const compat_ulong_t __user *u = ubuf;
592 compat_ulong_t reg;
593
594 if (target == current)
595 flushw_user();
596
597 pos /= sizeof(reg);
598 count /= sizeof(reg);
599
600 if (kbuf) {
601 for (; count > 0 && pos < 16; count--)
602 regs->u_regs[pos++] = *k++;
603
604 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
605 reg_window -= 16;
606 if (target == current) {
607 for (; count > 0 && pos < 32; count--) {
608 if (put_user(*k++, &reg_window[pos++]))
609 return -EFAULT;
610 }
611 } else {
612 for (; count > 0 && pos < 32; count--) {
613 if (access_process_vm(target,
614 (unsigned long)
615 &reg_window[pos],
616 (void *) k,
617 sizeof(*k), 1)
618 != sizeof(*k))
619 return -EFAULT;
620 k++;
621 pos++;
622 }
623 }
624 } else {
625 for (; count > 0 && pos < 16; count--) {
626 if (get_user(reg, u++))
627 return -EFAULT;
628 regs->u_regs[pos++] = reg;
629 }
630
631 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
632 reg_window -= 16;
633 if (target == current) {
634 for (; count > 0 && pos < 32; count--) {
635 if (get_user(reg, u++) ||
636 put_user(reg, &reg_window[pos++]))
637 return -EFAULT;
638 }
639 } else {
640 for (; count > 0 && pos < 32; count--) {
641 if (access_process_vm(target,
642 (unsigned long)
643 u,
644 &reg, sizeof(reg), 0)
645 != sizeof(reg))
646 return -EFAULT;
647 if (access_process_vm(target,
648 (unsigned long)
649 &reg_window[pos],
650 &reg, sizeof(reg), 1)
651 != sizeof(reg))
652 return -EFAULT;
653 pos++;
654 u++;
655 }
656 }
657 }
658 while (count > 0) {
659 unsigned long tstate;
660
661 if (kbuf)
662 reg = *k++;
663 else if (get_user(reg, u++))
664 return -EFAULT;
665
666 switch (pos) {
667 case 32: /* PSR */
668 tstate = regs->tstate;
669 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
670 tstate |= psr_to_tstate_icc(reg);
671 if (reg & PSR_SYSCALL)
672 tstate |= TSTATE_SYSCALL;
673 regs->tstate = tstate;
674 break;
675 case 33: /* PC */
676 regs->tpc = reg;
677 break;
678 case 34: /* NPC */
679 regs->tnpc = reg;
680 break;
681 case 35: /* Y */
682 regs->y = reg;
683 break;
684 case 36: /* WIM */
685 case 37: /* TBR */
686 break;
687 default:
688 goto finish;
689 }
690
691 pos++;
692 count--;
693 }
694 finish:
695 pos *= sizeof(reg);
696 count *= sizeof(reg);
697
698 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
699 38 * sizeof(reg), -1);
700 }
701
702 static int fpregs32_get(struct task_struct *target,
703 const struct user_regset *regset,
704 unsigned int pos, unsigned int count,
705 void *kbuf, void __user *ubuf)
706 {
707 const unsigned long *fpregs = task_thread_info(target)->fpregs;
708 compat_ulong_t enabled;
709 unsigned long fprs;
710 compat_ulong_t fsr;
711 int ret = 0;
712
713 if (target == current)
714 save_and_clear_fpu();
715
716 fprs = task_thread_info(target)->fpsaved[0];
717 if (fprs & FPRS_FEF) {
718 fsr = task_thread_info(target)->xfsr[0];
719 enabled = 1;
720 } else {
721 fsr = 0;
722 enabled = 0;
723 }
724
725 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
726 fpregs,
727 0, 32 * sizeof(u32));
728
729 if (!ret)
730 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
731 32 * sizeof(u32),
732 33 * sizeof(u32));
733 if (!ret)
734 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
735 &fsr,
736 33 * sizeof(u32),
737 34 * sizeof(u32));
738
739 if (!ret) {
740 compat_ulong_t val;
741
742 val = (enabled << 8) | (8 << 16);
743 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
744 &val,
745 34 * sizeof(u32),
746 35 * sizeof(u32));
747 }
748
749 if (!ret)
750 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
751 35 * sizeof(u32), -1);
752
753 return ret;
754 }
755
756 static int fpregs32_set(struct task_struct *target,
757 const struct user_regset *regset,
758 unsigned int pos, unsigned int count,
759 const void *kbuf, const void __user *ubuf)
760 {
761 unsigned long *fpregs = task_thread_info(target)->fpregs;
762 unsigned long fprs;
763 int ret;
764
765 if (target == current)
766 save_and_clear_fpu();
767
768 fprs = task_thread_info(target)->fpsaved[0];
769
770 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
771 fpregs,
772 0, 32 * sizeof(u32));
773 if (!ret)
774 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
775 32 * sizeof(u32),
776 33 * sizeof(u32));
777 if (!ret && count > 0) {
778 compat_ulong_t fsr;
779 unsigned long val;
780
781 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
782 &fsr,
783 33 * sizeof(u32),
784 34 * sizeof(u32));
785 if (!ret) {
786 val = task_thread_info(target)->xfsr[0];
787 val &= 0xffffffff00000000UL;
788 val |= fsr;
789 task_thread_info(target)->xfsr[0] = val;
790 }
791 }
792
793 fprs |= (FPRS_FEF | FPRS_DL);
794 task_thread_info(target)->fpsaved[0] = fprs;
795
796 if (!ret)
797 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
798 34 * sizeof(u32), -1);
799 return ret;
800 }
801
802 static const struct user_regset sparc32_regsets[] = {
803 /* Format is:
804 * G0 --> G7
805 * O0 --> O7
806 * L0 --> L7
807 * I0 --> I7
808 * PSR, PC, nPC, Y, WIM, TBR
809 */
810 [REGSET_GENERAL] = {
811 .core_note_type = NT_PRSTATUS,
812 .n = 38,
813 .size = sizeof(u32), .align = sizeof(u32),
814 .get = genregs32_get, .set = genregs32_set
815 },
816 /* Format is:
817 * F0 --> F31
818 * empty 32-bit word
819 * FSR (32--bit word)
820 * FPU QUEUE COUNT (8-bit char)
821 * FPU QUEUE ENTRYSIZE (8-bit char)
822 * FPU ENABLED (8-bit char)
823 * empty 8-bit char
824 * FPU QUEUE (64 32-bit ints)
825 */
826 [REGSET_FP] = {
827 .core_note_type = NT_PRFPREG,
828 .n = 99,
829 .size = sizeof(u32), .align = sizeof(u32),
830 .get = fpregs32_get, .set = fpregs32_set
831 },
832 };
833
834 static const struct user_regset_view user_sparc32_view = {
835 .name = "sparc", .e_machine = EM_SPARC,
836 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
837 };
838 #endif /* CONFIG_COMPAT */
839
840 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
841 {
842 #ifdef CONFIG_COMPAT
843 if (test_tsk_thread_flag(task, TIF_32BIT))
844 return &user_sparc32_view;
845 #endif
846 return &user_sparc64_view;
847 }
848
849 #ifdef CONFIG_COMPAT
850 struct compat_fps {
851 unsigned int regs[32];
852 unsigned int fsr;
853 unsigned int flags;
854 unsigned int extra;
855 unsigned int fpqd;
856 struct compat_fq {
857 unsigned int insnaddr;
858 unsigned int insn;
859 } fpq[16];
860 };
861
862 long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
863 compat_ulong_t caddr, compat_ulong_t cdata)
864 {
865 const struct user_regset_view *view = task_user_regset_view(current);
866 compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
867 struct pt_regs32 __user *pregs;
868 struct compat_fps __user *fps;
869 unsigned long addr2 = caddr2;
870 unsigned long addr = caddr;
871 unsigned long data = cdata;
872 int ret;
873
874 pregs = (struct pt_regs32 __user *) addr;
875 fps = (struct compat_fps __user *) addr;
876
877 switch (request) {
878 case PTRACE_PEEKUSR:
879 ret = (addr != 0) ? -EIO : 0;
880 break;
881
882 case PTRACE_GETREGS:
883 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
884 32 * sizeof(u32),
885 4 * sizeof(u32),
886 &pregs->psr);
887 if (!ret)
888 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
889 1 * sizeof(u32),
890 15 * sizeof(u32),
891 &pregs->u_regs[0]);
892 break;
893
894 case PTRACE_SETREGS:
895 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
896 32 * sizeof(u32),
897 4 * sizeof(u32),
898 &pregs->psr);
899 if (!ret)
900 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
901 1 * sizeof(u32),
902 15 * sizeof(u32),
903 &pregs->u_regs[0]);
904 break;
905
906 case PTRACE_GETFPREGS:
907 ret = copy_regset_to_user(child, view, REGSET_FP,
908 0 * sizeof(u32),
909 32 * sizeof(u32),
910 &fps->regs[0]);
911 if (!ret)
912 ret = copy_regset_to_user(child, view, REGSET_FP,
913 33 * sizeof(u32),
914 1 * sizeof(u32),
915 &fps->fsr);
916 if (!ret) {
917 if (__put_user(0, &fps->flags) ||
918 __put_user(0, &fps->extra) ||
919 __put_user(0, &fps->fpqd) ||
920 clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
921 ret = -EFAULT;
922 }
923 break;
924
925 case PTRACE_SETFPREGS:
926 ret = copy_regset_from_user(child, view, REGSET_FP,
927 0 * sizeof(u32),
928 32 * sizeof(u32),
929 &fps->regs[0]);
930 if (!ret)
931 ret = copy_regset_from_user(child, view, REGSET_FP,
932 33 * sizeof(u32),
933 1 * sizeof(u32),
934 &fps->fsr);
935 break;
936
937 case PTRACE_READTEXT:
938 case PTRACE_READDATA:
939 ret = ptrace_readdata(child, addr,
940 (char __user *)addr2, data);
941 if (ret == data)
942 ret = 0;
943 else if (ret >= 0)
944 ret = -EIO;
945 break;
946
947 case PTRACE_WRITETEXT:
948 case PTRACE_WRITEDATA:
949 ret = ptrace_writedata(child, (char __user *) addr2,
950 addr, data);
951 if (ret == data)
952 ret = 0;
953 else if (ret >= 0)
954 ret = -EIO;
955 break;
956
957 default:
958 if (request == PTRACE_SPARC_DETACH)
959 request = PTRACE_DETACH;
960 ret = compat_ptrace_request(child, request, addr, data);
961 break;
962 }
963
964 return ret;
965 }
966 #endif /* CONFIG_COMPAT */
967
968 struct fps {
969 unsigned int regs[64];
970 unsigned long fsr;
971 };
972
973 long arch_ptrace(struct task_struct *child, long request,
974 unsigned long addr, unsigned long data)
975 {
976 const struct user_regset_view *view = task_user_regset_view(current);
977 unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
978 struct pt_regs __user *pregs;
979 struct fps __user *fps;
980 void __user *addr2p;
981 int ret;
982
983 pregs = (struct pt_regs __user *) addr;
984 fps = (struct fps __user *) addr;
985 addr2p = (void __user *) addr2;
986
987 switch (request) {
988 case PTRACE_PEEKUSR:
989 ret = (addr != 0) ? -EIO : 0;
990 break;
991
992 case PTRACE_GETREGS64:
993 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
994 1 * sizeof(u64),
995 15 * sizeof(u64),
996 &pregs->u_regs[0]);
997 if (!ret) {
998 /* XXX doesn't handle 'y' register correctly XXX */
999 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
1000 32 * sizeof(u64),
1001 4 * sizeof(u64),
1002 &pregs->tstate);
1003 }
1004 break;
1005
1006 case PTRACE_SETREGS64:
1007 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1008 1 * sizeof(u64),
1009 15 * sizeof(u64),
1010 &pregs->u_regs[0]);
1011 if (!ret) {
1012 /* XXX doesn't handle 'y' register correctly XXX */
1013 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1014 32 * sizeof(u64),
1015 4 * sizeof(u64),
1016 &pregs->tstate);
1017 }
1018 break;
1019
1020 case PTRACE_GETFPREGS64:
1021 ret = copy_regset_to_user(child, view, REGSET_FP,
1022 0 * sizeof(u64),
1023 33 * sizeof(u64),
1024 fps);
1025 break;
1026
1027 case PTRACE_SETFPREGS64:
1028 ret = copy_regset_from_user(child, view, REGSET_FP,
1029 0 * sizeof(u64),
1030 33 * sizeof(u64),
1031 fps);
1032 break;
1033
1034 case PTRACE_READTEXT:
1035 case PTRACE_READDATA:
1036 ret = ptrace_readdata(child, addr, addr2p, data);
1037 if (ret == data)
1038 ret = 0;
1039 else if (ret >= 0)
1040 ret = -EIO;
1041 break;
1042
1043 case PTRACE_WRITETEXT:
1044 case PTRACE_WRITEDATA:
1045 ret = ptrace_writedata(child, addr2p, addr, data);
1046 if (ret == data)
1047 ret = 0;
1048 else if (ret >= 0)
1049 ret = -EIO;
1050 break;
1051
1052 default:
1053 if (request == PTRACE_SPARC_DETACH)
1054 request = PTRACE_DETACH;
1055 ret = ptrace_request(child, request, addr, data);
1056 break;
1057 }
1058
1059 return ret;
1060 }
1061
1062 asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1063 {
1064 int ret = 0;
1065
1066 /* do the secure computing check first */
1067 secure_computing_strict(regs->u_regs[UREG_G1]);
1068
1069 if (test_thread_flag(TIF_SYSCALL_TRACE))
1070 ret = tracehook_report_syscall_entry(regs);
1071
1072 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1073 trace_sys_enter(regs, regs->u_regs[UREG_G1]);
1074
1075 audit_syscall_entry((test_thread_flag(TIF_32BIT) ?
1076 AUDIT_ARCH_SPARC :
1077 AUDIT_ARCH_SPARC64),
1078 regs->u_regs[UREG_G1],
1079 regs->u_regs[UREG_I0],
1080 regs->u_regs[UREG_I1],
1081 regs->u_regs[UREG_I2],
1082 regs->u_regs[UREG_I3]);
1083
1084 return ret;
1085 }
1086
1087 asmlinkage void syscall_trace_leave(struct pt_regs *regs)
1088 {
1089 audit_syscall_exit(regs);
1090
1091 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1092 trace_sys_exit(regs, regs->u_regs[UREG_I0]);
1093
1094 if (test_thread_flag(TIF_SYSCALL_TRACE))
1095 tracehook_report_syscall_exit(regs, 0);
1096 }
Linux with added FPC-III support