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1// SPDX-License-Identifier: GPL-2.0-only
2/* ptrace.c: Sparc process tracing support.
3 *
4 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 *
7 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
8 * and David Mosberger.
9 *
10 * Added Linux support -miguel (weird, eh?, the original code was meant
11 * to emulate SunOS).
12 */
13
14#include <linux/kernel.h>
15#include <linux/sched.h>
16#include <linux/sched/task_stack.h>
17#include <linux/mm.h>
18#include <linux/errno.h>
19#include <linux/export.h>
20#include <linux/ptrace.h>
21#include <linux/user.h>
22#include <linux/smp.h>
23#include <linux/security.h>
24#include <linux/seccomp.h>
25#include <linux/audit.h>
26#include <linux/signal.h>
27#include <linux/regset.h>
28#include <trace/syscall.h>
29#include <linux/compat.h>
30#include <linux/elf.h>
31#include <linux/context_tracking.h>
32
33#include <asm/asi.h>
34#include <linux/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/* #define ALLOW_INIT_TRACING */
48
49struct pt_regs_offset {
50 const char *name;
51 int offset;
52};
53
54#define REG_OFFSET_NAME(n, r) \
55 {.name = n, .offset = (PT_V9_##r)}
56#define REG_OFFSET_END {.name = NULL, .offset = 0}
57
58static const struct pt_regs_offset regoffset_table[] = {
59 REG_OFFSET_NAME("g0", G0),
60 REG_OFFSET_NAME("g1", G1),
61 REG_OFFSET_NAME("g2", G2),
62 REG_OFFSET_NAME("g3", G3),
63 REG_OFFSET_NAME("g4", G4),
64 REG_OFFSET_NAME("g5", G5),
65 REG_OFFSET_NAME("g6", G6),
66 REG_OFFSET_NAME("g7", G7),
67
68 REG_OFFSET_NAME("i0", I0),
69 REG_OFFSET_NAME("i1", I1),
70 REG_OFFSET_NAME("i2", I2),
71 REG_OFFSET_NAME("i3", I3),
72 REG_OFFSET_NAME("i4", I4),
73 REG_OFFSET_NAME("i5", I5),
74 REG_OFFSET_NAME("i6", I6),
75 REG_OFFSET_NAME("i7", I7),
76
77 REG_OFFSET_NAME("tstate", TSTATE),
78 REG_OFFSET_NAME("pc", TPC),
79 REG_OFFSET_NAME("npc", TNPC),
80 REG_OFFSET_NAME("y", Y),
81 REG_OFFSET_NAME("lr", I7),
82
83 REG_OFFSET_END,
84};
85
86/*
87 * Called by kernel/ptrace.c when detaching..
88 *
89 * Make sure single step bits etc are not set.
90 */
91void ptrace_disable(struct task_struct *child)
92{
93 /* nothing to do */
94}
95
96/* To get the necessary page struct, access_process_vm() first calls
97 * get_user_pages(). This has done a flush_dcache_page() on the
98 * accessed page. Then our caller (copy_{to,from}_user_page()) did
99 * to memcpy to read/write the data from that page.
100 *
101 * Now, the only thing we have to do is:
102 * 1) flush the D-cache if it's possible than an illegal alias
103 * has been created
104 * 2) flush the I-cache if this is pre-cheetah and we did a write
105 */
106void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
107 unsigned long uaddr, void *kaddr,
108 unsigned long len, int write)
109{
110 BUG_ON(len > PAGE_SIZE);
111
112 if (tlb_type == hypervisor)
113 return;
114
115 preempt_disable();
116
117#ifdef DCACHE_ALIASING_POSSIBLE
118 /* If bit 13 of the kernel address we used to access the
119 * user page is the same as the virtual address that page
120 * is mapped to in the user's address space, we can skip the
121 * D-cache flush.
122 */
123 if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) {
124 unsigned long start = __pa(kaddr);
125 unsigned long end = start + len;
126 unsigned long dcache_line_size;
127
128 dcache_line_size = local_cpu_data().dcache_line_size;
129
130 if (tlb_type == spitfire) {
131 for (; start < end; start += dcache_line_size)
132 spitfire_put_dcache_tag(start & 0x3fe0, 0x0);
133 } else {
134 start &= ~(dcache_line_size - 1);
135 for (; start < end; start += dcache_line_size)
136 __asm__ __volatile__(
137 "stxa %%g0, [%0] %1\n\t"
138 "membar #Sync"
139 : /* no outputs */
140 : "r" (start),
141 "i" (ASI_DCACHE_INVALIDATE));
142 }
143 }
144#endif
145 if (write && tlb_type == spitfire) {
146 unsigned long start = (unsigned long) kaddr;
147 unsigned long end = start + len;
148 unsigned long icache_line_size;
149
150 icache_line_size = local_cpu_data().icache_line_size;
151
152 for (; start < end; start += icache_line_size)
153 flushi(start);
154 }
155
156 preempt_enable();
157}
158EXPORT_SYMBOL_GPL(flush_ptrace_access);
159
160static int get_from_target(struct task_struct *target, unsigned long uaddr,
161 void *kbuf, int len)
162{
163 if (target == current) {
164 if (copy_from_user(kbuf, (void __user *) uaddr, len))
165 return -EFAULT;
166 } else {
167 int len2 = access_process_vm(target, uaddr, kbuf, len,
168 FOLL_FORCE);
169 if (len2 != len)
170 return -EFAULT;
171 }
172 return 0;
173}
174
175static int set_to_target(struct task_struct *target, unsigned long uaddr,
176 void *kbuf, int len)
177{
178 if (target == current) {
179 if (copy_to_user((void __user *) uaddr, kbuf, len))
180 return -EFAULT;
181 } else {
182 int len2 = access_process_vm(target, uaddr, kbuf, len,
183 FOLL_FORCE | FOLL_WRITE);
184 if (len2 != len)
185 return -EFAULT;
186 }
187 return 0;
188}
189
190static int regwindow64_get(struct task_struct *target,
191 const struct pt_regs *regs,
192 struct reg_window *wbuf)
193{
194 unsigned long rw_addr = regs->u_regs[UREG_I6];
195
196 if (!test_thread_64bit_stack(rw_addr)) {
197 struct reg_window32 win32;
198 int i;
199
200 if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
201 return -EFAULT;
202 for (i = 0; i < 8; i++)
203 wbuf->locals[i] = win32.locals[i];
204 for (i = 0; i < 8; i++)
205 wbuf->ins[i] = win32.ins[i];
206 } else {
207 rw_addr += STACK_BIAS;
208 if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
209 return -EFAULT;
210 }
211
212 return 0;
213}
214
215static int regwindow64_set(struct task_struct *target,
216 const struct pt_regs *regs,
217 struct reg_window *wbuf)
218{
219 unsigned long rw_addr = regs->u_regs[UREG_I6];
220
221 if (!test_thread_64bit_stack(rw_addr)) {
222 struct reg_window32 win32;
223 int i;
224
225 for (i = 0; i < 8; i++)
226 win32.locals[i] = wbuf->locals[i];
227 for (i = 0; i < 8; i++)
228 win32.ins[i] = wbuf->ins[i];
229
230 if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
231 return -EFAULT;
232 } else {
233 rw_addr += STACK_BIAS;
234 if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
235 return -EFAULT;
236 }
237
238 return 0;
239}
240
241enum sparc_regset {
242 REGSET_GENERAL,
243 REGSET_FP,
244};
245
246static int genregs64_get(struct task_struct *target,
247 const struct user_regset *regset,
248 struct membuf to)
249{
250 const struct pt_regs *regs = task_pt_regs(target);
251 struct reg_window window;
252
253 if (target == current)
254 flushw_user();
255
256 membuf_write(&to, regs->u_regs, 16 * sizeof(u64));
257 if (!to.left)
258 return 0;
259 if (regwindow64_get(target, regs, &window))
260 return -EFAULT;
261 membuf_write(&to, &window, 16 * sizeof(u64));
262 /* TSTATE, TPC, TNPC */
263 membuf_write(&to, ®s->tstate, 3 * sizeof(u64));
264 return membuf_store(&to, (u64)regs->y);
265}
266
267static int genregs64_set(struct task_struct *target,
268 const struct user_regset *regset,
269 unsigned int pos, unsigned int count,
270 const void *kbuf, const void __user *ubuf)
271{
272 struct pt_regs *regs = task_pt_regs(target);
273 int ret;
274
275 if (target == current)
276 flushw_user();
277
278 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
279 regs->u_regs,
280 0, 16 * sizeof(u64));
281 if (!ret && count && pos < (32 * sizeof(u64))) {
282 struct reg_window window;
283
284 if (regwindow64_get(target, regs, &window))
285 return -EFAULT;
286
287 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
288 &window,
289 16 * sizeof(u64),
290 32 * sizeof(u64));
291
292 if (!ret &&
293 regwindow64_set(target, regs, &window))
294 return -EFAULT;
295 }
296
297 if (!ret && count > 0) {
298 unsigned long tstate;
299
300 /* TSTATE */
301 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
302 &tstate,
303 32 * sizeof(u64),
304 33 * sizeof(u64));
305 if (!ret) {
306 /* Only the condition codes and the "in syscall"
307 * state can be modified in the %tstate register.
308 */
309 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
310 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
311 regs->tstate |= tstate;
312 }
313 }
314
315 if (!ret) {
316 /* TPC, TNPC */
317 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
318 ®s->tpc,
319 33 * sizeof(u64),
320 35 * sizeof(u64));
321 }
322
323 if (!ret) {
324 unsigned long y = regs->y;
325
326 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
327 &y,
328 35 * sizeof(u64),
329 36 * sizeof(u64));
330 if (!ret)
331 regs->y = y;
332 }
333
334 if (!ret)
335 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
336 36 * sizeof(u64), -1);
337
338 return ret;
339}
340
341static int fpregs64_get(struct task_struct *target,
342 const struct user_regset *regset,
343 struct membuf to)
344{
345 struct thread_info *t = task_thread_info(target);
346 unsigned long fprs;
347
348 if (target == current)
349 save_and_clear_fpu();
350
351 fprs = t->fpsaved[0];
352
353 if (fprs & FPRS_DL)
354 membuf_write(&to, t->fpregs, 16 * sizeof(u64));
355 else
356 membuf_zero(&to, 16 * sizeof(u64));
357
358 if (fprs & FPRS_DU)
359 membuf_write(&to, t->fpregs + 16, 16 * sizeof(u64));
360 else
361 membuf_zero(&to, 16 * sizeof(u64));
362 if (fprs & FPRS_FEF) {
363 membuf_store(&to, t->xfsr[0]);
364 membuf_store(&to, t->gsr[0]);
365 } else {
366 membuf_zero(&to, 2 * sizeof(u64));
367 }
368 return membuf_store(&to, fprs);
369}
370
371static int fpregs64_set(struct task_struct *target,
372 const struct user_regset *regset,
373 unsigned int pos, unsigned int count,
374 const void *kbuf, const void __user *ubuf)
375{
376 unsigned long *fpregs = task_thread_info(target)->fpregs;
377 unsigned long fprs;
378 int ret;
379
380 if (target == current)
381 save_and_clear_fpu();
382
383 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
384 fpregs,
385 0, 32 * sizeof(u64));
386 if (!ret)
387 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
388 task_thread_info(target)->xfsr,
389 32 * sizeof(u64),
390 33 * sizeof(u64));
391 if (!ret)
392 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
393 task_thread_info(target)->gsr,
394 33 * sizeof(u64),
395 34 * sizeof(u64));
396
397 fprs = task_thread_info(target)->fpsaved[0];
398 if (!ret && count > 0) {
399 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
400 &fprs,
401 34 * sizeof(u64),
402 35 * sizeof(u64));
403 }
404
405 fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
406 task_thread_info(target)->fpsaved[0] = fprs;
407
408 if (!ret)
409 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
410 35 * sizeof(u64), -1);
411 return ret;
412}
413
414static const struct user_regset sparc64_regsets[] = {
415 /* Format is:
416 * G0 --> G7
417 * O0 --> O7
418 * L0 --> L7
419 * I0 --> I7
420 * TSTATE, TPC, TNPC, Y
421 */
422 [REGSET_GENERAL] = {
423 .core_note_type = NT_PRSTATUS,
424 .n = 36,
425 .size = sizeof(u64), .align = sizeof(u64),
426 .regset_get = genregs64_get, .set = genregs64_set
427 },
428 /* Format is:
429 * F0 --> F63
430 * FSR
431 * GSR
432 * FPRS
433 */
434 [REGSET_FP] = {
435 .core_note_type = NT_PRFPREG,
436 .n = 35,
437 .size = sizeof(u64), .align = sizeof(u64),
438 .regset_get = fpregs64_get, .set = fpregs64_set
439 },
440};
441
442static int getregs64_get(struct task_struct *target,
443 const struct user_regset *regset,
444 struct membuf to)
445{
446 const struct pt_regs *regs = task_pt_regs(target);
447
448 if (target == current)
449 flushw_user();
450
451 membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u64));
452 membuf_store(&to, (u64)0);
453 membuf_write(&to, ®s->tstate, 3 * sizeof(u64));
454 return membuf_store(&to, (u64)regs->y);
455}
456
457static int setregs64_set(struct task_struct *target,
458 const struct user_regset *regset,
459 unsigned int pos, unsigned int count,
460 const void *kbuf, const void __user *ubuf)
461{
462 struct pt_regs *regs = task_pt_regs(target);
463 unsigned long y = regs->y;
464 unsigned long tstate;
465 int ret;
466
467 if (target == current)
468 flushw_user();
469
470 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
471 regs->u_regs + 1,
472 0 * sizeof(u64),
473 15 * sizeof(u64));
474 if (ret)
475 return ret;
476 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
477 15 * sizeof(u64), 16 * sizeof(u64));
478 /* TSTATE */
479 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
480 &tstate,
481 16 * sizeof(u64),
482 17 * sizeof(u64));
483 if (ret)
484 return ret;
485 /* Only the condition codes and the "in syscall"
486 * state can be modified in the %tstate register.
487 */
488 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
489 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
490 regs->tstate |= tstate;
491
492 /* TPC, TNPC */
493 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
494 ®s->tpc,
495 17 * sizeof(u64),
496 19 * sizeof(u64));
497 if (ret)
498 return ret;
499 /* Y */
500 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
501 &y,
502 19 * sizeof(u64),
503 20 * sizeof(u64));
504 if (!ret)
505 regs->y = y;
506 return ret;
507}
508
509static const struct user_regset ptrace64_regsets[] = {
510 /* Format is:
511 * G1 --> G7
512 * O0 --> O7
513 * 0
514 * TSTATE, TPC, TNPC, Y
515 */
516 [REGSET_GENERAL] = {
517 .n = 20, .size = sizeof(u64),
518 .regset_get = getregs64_get, .set = setregs64_set,
519 },
520};
521
522static const struct user_regset_view ptrace64_view = {
523 .regsets = ptrace64_regsets, .n = ARRAY_SIZE(ptrace64_regsets)
524};
525
526static const struct user_regset_view user_sparc64_view = {
527 .name = "sparc64", .e_machine = EM_SPARCV9,
528 .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
529};
530
531#ifdef CONFIG_COMPAT
532static int genregs32_get(struct task_struct *target,
533 const struct user_regset *regset,
534 struct membuf to)
535{
536 const struct pt_regs *regs = task_pt_regs(target);
537 u32 uregs[16];
538 int i;
539
540 if (target == current)
541 flushw_user();
542
543 for (i = 0; i < 16; i++)
544 membuf_store(&to, (u32)regs->u_regs[i]);
545 if (!to.left)
546 return 0;
547 if (get_from_target(target, regs->u_regs[UREG_I6],
548 uregs, sizeof(uregs)))
549 return -EFAULT;
550 membuf_write(&to, uregs, 16 * sizeof(u32));
551 membuf_store(&to, (u32)tstate_to_psr(regs->tstate));
552 membuf_store(&to, (u32)(regs->tpc));
553 membuf_store(&to, (u32)(regs->tnpc));
554 membuf_store(&to, (u32)(regs->y));
555 return membuf_zero(&to, 2 * sizeof(u32));
556}
557
558static int genregs32_set(struct task_struct *target,
559 const struct user_regset *regset,
560 unsigned int pos, unsigned int count,
561 const void *kbuf, const void __user *ubuf)
562{
563 struct pt_regs *regs = task_pt_regs(target);
564 compat_ulong_t __user *reg_window;
565 const compat_ulong_t *k = kbuf;
566 const compat_ulong_t __user *u = ubuf;
567 compat_ulong_t reg;
568
569 if (target == current)
570 flushw_user();
571
572 pos /= sizeof(reg);
573 count /= sizeof(reg);
574
575 if (kbuf) {
576 for (; count > 0 && pos < 16; count--)
577 regs->u_regs[pos++] = *k++;
578
579 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
580 reg_window -= 16;
581 if (target == current) {
582 for (; count > 0 && pos < 32; count--) {
583 if (put_user(*k++, ®_window[pos++]))
584 return -EFAULT;
585 }
586 } else {
587 for (; count > 0 && pos < 32; count--) {
588 if (access_process_vm(target,
589 (unsigned long)
590 ®_window[pos],
591 (void *) k,
592 sizeof(*k),
593 FOLL_FORCE | FOLL_WRITE)
594 != sizeof(*k))
595 return -EFAULT;
596 k++;
597 pos++;
598 }
599 }
600 } else {
601 for (; count > 0 && pos < 16; count--) {
602 if (get_user(reg, u++))
603 return -EFAULT;
604 regs->u_regs[pos++] = reg;
605 }
606
607 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
608 reg_window -= 16;
609 if (target == current) {
610 for (; count > 0 && pos < 32; count--) {
611 if (get_user(reg, u++) ||
612 put_user(reg, ®_window[pos++]))
613 return -EFAULT;
614 }
615 } else {
616 for (; count > 0 && pos < 32; count--) {
617 if (get_user(reg, u++))
618 return -EFAULT;
619 if (access_process_vm(target,
620 (unsigned long)
621 ®_window[pos],
622 ®, sizeof(reg),
623 FOLL_FORCE | FOLL_WRITE)
624 != sizeof(reg))
625 return -EFAULT;
626 pos++;
627 u++;
628 }
629 }
630 }
631 while (count > 0) {
632 unsigned long tstate;
633
634 if (kbuf)
635 reg = *k++;
636 else if (get_user(reg, u++))
637 return -EFAULT;
638
639 switch (pos) {
640 case 32: /* PSR */
641 tstate = regs->tstate;
642 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
643 tstate |= psr_to_tstate_icc(reg);
644 if (reg & PSR_SYSCALL)
645 tstate |= TSTATE_SYSCALL;
646 regs->tstate = tstate;
647 break;
648 case 33: /* PC */
649 regs->tpc = reg;
650 break;
651 case 34: /* NPC */
652 regs->tnpc = reg;
653 break;
654 case 35: /* Y */
655 regs->y = reg;
656 break;
657 case 36: /* WIM */
658 case 37: /* TBR */
659 break;
660 default:
661 goto finish;
662 }
663
664 pos++;
665 count--;
666 }
667finish:
668 pos *= sizeof(reg);
669 count *= sizeof(reg);
670
671 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
672 38 * sizeof(reg), -1);
673 return 0;
674}
675
676static int fpregs32_get(struct task_struct *target,
677 const struct user_regset *regset,
678 struct membuf to)
679{
680 struct thread_info *t = task_thread_info(target);
681 bool enabled;
682
683 if (target == current)
684 save_and_clear_fpu();
685
686 enabled = t->fpsaved[0] & FPRS_FEF;
687
688 membuf_write(&to, t->fpregs, 32 * sizeof(u32));
689 membuf_zero(&to, sizeof(u32));
690 if (enabled)
691 membuf_store(&to, (u32)t->xfsr[0]);
692 else
693 membuf_zero(&to, sizeof(u32));
694 membuf_store(&to, (u32)((enabled << 8) | (8 << 16)));
695 return membuf_zero(&to, 64 * sizeof(u32));
696}
697
698static int fpregs32_set(struct task_struct *target,
699 const struct user_regset *regset,
700 unsigned int pos, unsigned int count,
701 const void *kbuf, const void __user *ubuf)
702{
703 unsigned long *fpregs = task_thread_info(target)->fpregs;
704 unsigned long fprs;
705 int ret;
706
707 if (target == current)
708 save_and_clear_fpu();
709
710 fprs = task_thread_info(target)->fpsaved[0];
711
712 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
713 fpregs,
714 0, 32 * sizeof(u32));
715 if (!ret)
716 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
717 32 * sizeof(u32),
718 33 * sizeof(u32));
719 if (!ret && count > 0) {
720 compat_ulong_t fsr;
721 unsigned long val;
722
723 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
724 &fsr,
725 33 * sizeof(u32),
726 34 * sizeof(u32));
727 if (!ret) {
728 val = task_thread_info(target)->xfsr[0];
729 val &= 0xffffffff00000000UL;
730 val |= fsr;
731 task_thread_info(target)->xfsr[0] = val;
732 }
733 }
734
735 fprs |= (FPRS_FEF | FPRS_DL);
736 task_thread_info(target)->fpsaved[0] = fprs;
737
738 if (!ret)
739 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
740 34 * sizeof(u32), -1);
741 return ret;
742}
743
744static const struct user_regset sparc32_regsets[] = {
745 /* Format is:
746 * G0 --> G7
747 * O0 --> O7
748 * L0 --> L7
749 * I0 --> I7
750 * PSR, PC, nPC, Y, WIM, TBR
751 */
752 [REGSET_GENERAL] = {
753 .core_note_type = NT_PRSTATUS,
754 .n = 38,
755 .size = sizeof(u32), .align = sizeof(u32),
756 .regset_get = genregs32_get, .set = genregs32_set
757 },
758 /* Format is:
759 * F0 --> F31
760 * empty 32-bit word
761 * FSR (32--bit word)
762 * FPU QUEUE COUNT (8-bit char)
763 * FPU QUEUE ENTRYSIZE (8-bit char)
764 * FPU ENABLED (8-bit char)
765 * empty 8-bit char
766 * FPU QUEUE (64 32-bit ints)
767 */
768 [REGSET_FP] = {
769 .core_note_type = NT_PRFPREG,
770 .n = 99,
771 .size = sizeof(u32), .align = sizeof(u32),
772 .regset_get = fpregs32_get, .set = fpregs32_set
773 },
774};
775
776static int getregs_get(struct task_struct *target,
777 const struct user_regset *regset,
778 struct membuf to)
779{
780 const struct pt_regs *regs = task_pt_regs(target);
781 int i;
782
783 if (target == current)
784 flushw_user();
785
786 membuf_store(&to, (u32)tstate_to_psr(regs->tstate));
787 membuf_store(&to, (u32)(regs->tpc));
788 membuf_store(&to, (u32)(regs->tnpc));
789 membuf_store(&to, (u32)(regs->y));
790 for (i = 1; i < 16; i++)
791 membuf_store(&to, (u32)regs->u_regs[i]);
792 return to.left;
793}
794
795static int setregs_set(struct task_struct *target,
796 const struct user_regset *regset,
797 unsigned int pos, unsigned int count,
798 const void *kbuf, const void __user *ubuf)
799{
800 struct pt_regs *regs = task_pt_regs(target);
801 unsigned long tstate;
802 u32 uregs[19];
803 int i, ret;
804
805 if (target == current)
806 flushw_user();
807
808 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
809 uregs,
810 0, 19 * sizeof(u32));
811 if (ret)
812 return ret;
813
814 tstate = regs->tstate;
815 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
816 tstate |= psr_to_tstate_icc(uregs[0]);
817 if (uregs[0] & PSR_SYSCALL)
818 tstate |= TSTATE_SYSCALL;
819 regs->tstate = tstate;
820 regs->tpc = uregs[1];
821 regs->tnpc = uregs[2];
822 regs->y = uregs[3];
823
824 for (i = 1; i < 15; i++)
825 regs->u_regs[i] = uregs[3 + i];
826 return 0;
827}
828
829static int getfpregs_get(struct task_struct *target,
830 const struct user_regset *regset,
831 struct membuf to)
832{
833 struct thread_info *t = task_thread_info(target);
834
835 if (target == current)
836 save_and_clear_fpu();
837
838 membuf_write(&to, t->fpregs, 32 * sizeof(u32));
839 if (t->fpsaved[0] & FPRS_FEF)
840 membuf_store(&to, (u32)t->xfsr[0]);
841 else
842 membuf_zero(&to, sizeof(u32));
843 return membuf_zero(&to, 35 * sizeof(u32));
844}
845
846static int setfpregs_set(struct task_struct *target,
847 const struct user_regset *regset,
848 unsigned int pos, unsigned int count,
849 const void *kbuf, const void __user *ubuf)
850{
851 unsigned long *fpregs = task_thread_info(target)->fpregs;
852 unsigned long fprs;
853 int ret;
854
855 if (target == current)
856 save_and_clear_fpu();
857
858 fprs = task_thread_info(target)->fpsaved[0];
859
860 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
861 fpregs,
862 0, 32 * sizeof(u32));
863 if (!ret) {
864 compat_ulong_t fsr;
865 unsigned long val;
866
867 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
868 &fsr,
869 32 * sizeof(u32),
870 33 * sizeof(u32));
871 if (!ret) {
872 val = task_thread_info(target)->xfsr[0];
873 val &= 0xffffffff00000000UL;
874 val |= fsr;
875 task_thread_info(target)->xfsr[0] = val;
876 }
877 }
878
879 fprs |= (FPRS_FEF | FPRS_DL);
880 task_thread_info(target)->fpsaved[0] = fprs;
881 return ret;
882}
883
884static const struct user_regset ptrace32_regsets[] = {
885 [REGSET_GENERAL] = {
886 .n = 19, .size = sizeof(u32),
887 .regset_get = getregs_get, .set = setregs_set,
888 },
889 [REGSET_FP] = {
890 .n = 68, .size = sizeof(u32),
891 .regset_get = getfpregs_get, .set = setfpregs_set,
892 },
893};
894
895static const struct user_regset_view ptrace32_view = {
896 .regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
897};
898
899static const struct user_regset_view user_sparc32_view = {
900 .name = "sparc", .e_machine = EM_SPARC,
901 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
902};
903#endif /* CONFIG_COMPAT */
904
905const struct user_regset_view *task_user_regset_view(struct task_struct *task)
906{
907#ifdef CONFIG_COMPAT
908 if (test_tsk_thread_flag(task, TIF_32BIT))
909 return &user_sparc32_view;
910#endif
911 return &user_sparc64_view;
912}
913
914#ifdef CONFIG_COMPAT
915struct compat_fps {
916 unsigned int regs[32];
917 unsigned int fsr;
918 unsigned int flags;
919 unsigned int extra;
920 unsigned int fpqd;
921 struct compat_fq {
922 unsigned int insnaddr;
923 unsigned int insn;
924 } fpq[16];
925};
926
927long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
928 compat_ulong_t caddr, compat_ulong_t cdata)
929{
930 compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
931 struct pt_regs32 __user *pregs;
932 struct compat_fps __user *fps;
933 unsigned long addr2 = caddr2;
934 unsigned long addr = caddr;
935 unsigned long data = cdata;
936 int ret;
937
938 pregs = (struct pt_regs32 __user *) addr;
939 fps = (struct compat_fps __user *) addr;
940
941 switch (request) {
942 case PTRACE_PEEKUSR:
943 ret = (addr != 0) ? -EIO : 0;
944 break;
945
946 case PTRACE_GETREGS:
947 ret = copy_regset_to_user(child, &ptrace32_view,
948 REGSET_GENERAL, 0,
949 19 * sizeof(u32),
950 pregs);
951 break;
952
953 case PTRACE_SETREGS:
954 ret = copy_regset_from_user(child, &ptrace32_view,
955 REGSET_GENERAL, 0,
956 19 * sizeof(u32),
957 pregs);
958 break;
959
960 case PTRACE_GETFPREGS:
961 ret = copy_regset_to_user(child, &ptrace32_view,
962 REGSET_FP, 0,
963 68 * sizeof(u32),
964 fps);
965 break;
966
967 case PTRACE_SETFPREGS:
968 ret = copy_regset_from_user(child, &ptrace32_view,
969 REGSET_FP, 0,
970 33 * sizeof(u32),
971 fps);
972 break;
973
974 case PTRACE_READTEXT:
975 case PTRACE_READDATA:
976 ret = ptrace_readdata(child, addr,
977 (char __user *)addr2, data);
978 if (ret == data)
979 ret = 0;
980 else if (ret >= 0)
981 ret = -EIO;
982 break;
983
984 case PTRACE_WRITETEXT:
985 case PTRACE_WRITEDATA:
986 ret = ptrace_writedata(child, (char __user *) addr2,
987 addr, data);
988 if (ret == data)
989 ret = 0;
990 else if (ret >= 0)
991 ret = -EIO;
992 break;
993
994 default:
995 if (request == PTRACE_SPARC_DETACH)
996 request = PTRACE_DETACH;
997 ret = compat_ptrace_request(child, request, addr, data);
998 break;
999 }
1000
1001 return ret;
1002}
1003#endif /* CONFIG_COMPAT */
1004
1005struct fps {
1006 unsigned int regs[64];
1007 unsigned long fsr;
1008};
1009
1010long arch_ptrace(struct task_struct *child, long request,
1011 unsigned long addr, unsigned long data)
1012{
1013 const struct user_regset_view *view = task_user_regset_view(current);
1014 unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
1015 struct pt_regs __user *pregs;
1016 struct fps __user *fps;
1017 void __user *addr2p;
1018 int ret;
1019
1020 pregs = (struct pt_regs __user *) addr;
1021 fps = (struct fps __user *) addr;
1022 addr2p = (void __user *) addr2;
1023
1024 switch (request) {
1025 case PTRACE_PEEKUSR:
1026 ret = (addr != 0) ? -EIO : 0;
1027 break;
1028
1029 case PTRACE_GETREGS64:
1030 ret = copy_regset_to_user(child, &ptrace64_view,
1031 REGSET_GENERAL, 0,
1032 19 * sizeof(u64),
1033 pregs);
1034 break;
1035
1036 case PTRACE_SETREGS64:
1037 ret = copy_regset_from_user(child, &ptrace64_view,
1038 REGSET_GENERAL, 0,
1039 19 * sizeof(u64),
1040 pregs);
1041 break;
1042
1043 case PTRACE_GETFPREGS64:
1044 ret = copy_regset_to_user(child, view, REGSET_FP,
1045 0 * sizeof(u64),
1046 33 * sizeof(u64),
1047 fps);
1048 break;
1049
1050 case PTRACE_SETFPREGS64:
1051 ret = copy_regset_from_user(child, view, REGSET_FP,
1052 0 * sizeof(u64),
1053 33 * sizeof(u64),
1054 fps);
1055 break;
1056
1057 case PTRACE_READTEXT:
1058 case PTRACE_READDATA:
1059 ret = ptrace_readdata(child, addr, addr2p, data);
1060 if (ret == data)
1061 ret = 0;
1062 else if (ret >= 0)
1063 ret = -EIO;
1064 break;
1065
1066 case PTRACE_WRITETEXT:
1067 case PTRACE_WRITEDATA:
1068 ret = ptrace_writedata(child, addr2p, addr, data);
1069 if (ret == data)
1070 ret = 0;
1071 else if (ret >= 0)
1072 ret = -EIO;
1073 break;
1074
1075 default:
1076 if (request == PTRACE_SPARC_DETACH)
1077 request = PTRACE_DETACH;
1078 ret = ptrace_request(child, request, addr, data);
1079 break;
1080 }
1081
1082 return ret;
1083}
1084
1085asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1086{
1087 int ret = 0;
1088
1089 /* do the secure computing check first */
1090 secure_computing_strict(regs->u_regs[UREG_G1]);
1091
1092 if (test_thread_flag(TIF_NOHZ))
1093 user_exit();
1094
1095 if (test_thread_flag(TIF_SYSCALL_TRACE))
1096 ret = ptrace_report_syscall_entry(regs);
1097
1098 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1099 trace_sys_enter(regs, regs->u_regs[UREG_G1]);
1100
1101 audit_syscall_entry(regs->u_regs[UREG_G1], regs->u_regs[UREG_I0],
1102 regs->u_regs[UREG_I1], regs->u_regs[UREG_I2],
1103 regs->u_regs[UREG_I3]);
1104
1105 return ret;
1106}
1107
1108asmlinkage void syscall_trace_leave(struct pt_regs *regs)
1109{
1110 if (test_thread_flag(TIF_NOHZ))
1111 user_exit();
1112
1113 audit_syscall_exit(regs);
1114
1115 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1116 trace_sys_exit(regs, regs->u_regs[UREG_I0]);
1117
1118 if (test_thread_flag(TIF_SYSCALL_TRACE))
1119 ptrace_report_syscall_exit(regs, 0);
1120
1121 if (test_thread_flag(TIF_NOHZ))
1122 user_enter();
1123}
1124
1125/**
1126 * regs_query_register_offset() - query register offset from its name
1127 * @name: the name of a register
1128 *
1129 * regs_query_register_offset() returns the offset of a register in struct
1130 * pt_regs from its name. If the name is invalid, this returns -EINVAL;
1131 */
1132int regs_query_register_offset(const char *name)
1133{
1134 const struct pt_regs_offset *roff;
1135
1136 for (roff = regoffset_table; roff->name != NULL; roff++)
1137 if (!strcmp(roff->name, name))
1138 return roff->offset;
1139 return -EINVAL;
1140}
1141
1142/**
1143 * regs_within_kernel_stack() - check the address in the stack
1144 * @regs: pt_regs which contains kernel stack pointer.
1145 * @addr: address which is checked.
1146 *
1147 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
1148 * If @addr is within the kernel stack, it returns true. If not, returns false.
1149 */
1150static inline int regs_within_kernel_stack(struct pt_regs *regs,
1151 unsigned long addr)
1152{
1153 unsigned long ksp = kernel_stack_pointer(regs) + STACK_BIAS;
1154 return ((addr & ~(THREAD_SIZE - 1)) ==
1155 (ksp & ~(THREAD_SIZE - 1)));
1156}
1157
1158/**
1159 * regs_get_kernel_stack_nth() - get Nth entry of the stack
1160 * @regs: pt_regs which contains kernel stack pointer.
1161 * @n: stack entry number.
1162 *
1163 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
1164 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
1165 * this returns 0.
1166 */
1167unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
1168{
1169 unsigned long ksp = kernel_stack_pointer(regs) + STACK_BIAS;
1170 unsigned long *addr = (unsigned long *)ksp;
1171 addr += n;
1172 if (regs_within_kernel_stack(regs, (unsigned long)addr))
1173 return *addr;
1174 else
1175 return 0;
1176}
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/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 <trace/syscall.h>
27#include <linux/compat.h>
28#include <linux/elf.h>
29
30#include <asm/asi.h>
31#include <asm/pgtable.h>
32#include <asm/system.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 */
53void 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 */
68void 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
121static int get_from_target(struct task_struct *target, unsigned long uaddr,
122 void *kbuf, int len)
123{
124 if (target == current) {
125 if (copy_from_user(kbuf, (void __user *) uaddr, len))
126 return -EFAULT;
127 } else {
128 int len2 = access_process_vm(target, uaddr, kbuf, len, 0);
129 if (len2 != len)
130 return -EFAULT;
131 }
132 return 0;
133}
134
135static int set_to_target(struct task_struct *target, unsigned long uaddr,
136 void *kbuf, int len)
137{
138 if (target == current) {
139 if (copy_to_user((void __user *) uaddr, kbuf, len))
140 return -EFAULT;
141 } else {
142 int len2 = access_process_vm(target, uaddr, kbuf, len, 1);
143 if (len2 != len)
144 return -EFAULT;
145 }
146 return 0;
147}
148
149static int regwindow64_get(struct task_struct *target,
150 const struct pt_regs *regs,
151 struct reg_window *wbuf)
152{
153 unsigned long rw_addr = regs->u_regs[UREG_I6];
154
155 if (test_tsk_thread_flag(current, TIF_32BIT)) {
156 struct reg_window32 win32;
157 int i;
158
159 if (get_from_target(target, rw_addr, &win32, sizeof(win32)))
160 return -EFAULT;
161 for (i = 0; i < 8; i++)
162 wbuf->locals[i] = win32.locals[i];
163 for (i = 0; i < 8; i++)
164 wbuf->ins[i] = win32.ins[i];
165 } else {
166 rw_addr += STACK_BIAS;
167 if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf)))
168 return -EFAULT;
169 }
170
171 return 0;
172}
173
174static int regwindow64_set(struct task_struct *target,
175 const struct pt_regs *regs,
176 struct reg_window *wbuf)
177{
178 unsigned long rw_addr = regs->u_regs[UREG_I6];
179
180 if (test_tsk_thread_flag(current, TIF_32BIT)) {
181 struct reg_window32 win32;
182 int i;
183
184 for (i = 0; i < 8; i++)
185 win32.locals[i] = wbuf->locals[i];
186 for (i = 0; i < 8; i++)
187 win32.ins[i] = wbuf->ins[i];
188
189 if (set_to_target(target, rw_addr, &win32, sizeof(win32)))
190 return -EFAULT;
191 } else {
192 rw_addr += STACK_BIAS;
193 if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf)))
194 return -EFAULT;
195 }
196
197 return 0;
198}
199
200enum sparc_regset {
201 REGSET_GENERAL,
202 REGSET_FP,
203};
204
205static int genregs64_get(struct task_struct *target,
206 const struct user_regset *regset,
207 unsigned int pos, unsigned int count,
208 void *kbuf, void __user *ubuf)
209{
210 const struct pt_regs *regs = task_pt_regs(target);
211 int ret;
212
213 if (target == current)
214 flushw_user();
215
216 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
217 regs->u_regs,
218 0, 16 * sizeof(u64));
219 if (!ret && count && pos < (32 * sizeof(u64))) {
220 struct reg_window window;
221
222 if (regwindow64_get(target, regs, &window))
223 return -EFAULT;
224 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
225 &window,
226 16 * sizeof(u64),
227 32 * sizeof(u64));
228 }
229
230 if (!ret) {
231 /* TSTATE, TPC, TNPC */
232 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
233 ®s->tstate,
234 32 * sizeof(u64),
235 35 * sizeof(u64));
236 }
237
238 if (!ret) {
239 unsigned long y = regs->y;
240
241 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
242 &y,
243 35 * sizeof(u64),
244 36 * sizeof(u64));
245 }
246
247 if (!ret) {
248 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
249 36 * sizeof(u64), -1);
250
251 }
252 return ret;
253}
254
255static int genregs64_set(struct task_struct *target,
256 const struct user_regset *regset,
257 unsigned int pos, unsigned int count,
258 const void *kbuf, const void __user *ubuf)
259{
260 struct pt_regs *regs = task_pt_regs(target);
261 int ret;
262
263 if (target == current)
264 flushw_user();
265
266 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
267 regs->u_regs,
268 0, 16 * sizeof(u64));
269 if (!ret && count && pos < (32 * sizeof(u64))) {
270 struct reg_window window;
271
272 if (regwindow64_get(target, regs, &window))
273 return -EFAULT;
274
275 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
276 &window,
277 16 * sizeof(u64),
278 32 * sizeof(u64));
279
280 if (!ret &&
281 regwindow64_set(target, regs, &window))
282 return -EFAULT;
283 }
284
285 if (!ret && count > 0) {
286 unsigned long tstate;
287
288 /* TSTATE */
289 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
290 &tstate,
291 32 * sizeof(u64),
292 33 * sizeof(u64));
293 if (!ret) {
294 /* Only the condition codes and the "in syscall"
295 * state can be modified in the %tstate register.
296 */
297 tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
298 regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
299 regs->tstate |= tstate;
300 }
301 }
302
303 if (!ret) {
304 /* TPC, TNPC */
305 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
306 ®s->tpc,
307 33 * sizeof(u64),
308 35 * sizeof(u64));
309 }
310
311 if (!ret) {
312 unsigned long y;
313
314 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
315 &y,
316 35 * sizeof(u64),
317 36 * sizeof(u64));
318 if (!ret)
319 regs->y = y;
320 }
321
322 if (!ret)
323 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
324 36 * sizeof(u64), -1);
325
326 return ret;
327}
328
329static int fpregs64_get(struct task_struct *target,
330 const struct user_regset *regset,
331 unsigned int pos, unsigned int count,
332 void *kbuf, void __user *ubuf)
333{
334 const unsigned long *fpregs = task_thread_info(target)->fpregs;
335 unsigned long fprs, fsr, gsr;
336 int ret;
337
338 if (target == current)
339 save_and_clear_fpu();
340
341 fprs = task_thread_info(target)->fpsaved[0];
342
343 if (fprs & FPRS_DL)
344 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
345 fpregs,
346 0, 16 * sizeof(u64));
347 else
348 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
349 0,
350 16 * sizeof(u64));
351
352 if (!ret) {
353 if (fprs & FPRS_DU)
354 ret = user_regset_copyout(&pos, &count,
355 &kbuf, &ubuf,
356 fpregs + 16,
357 16 * sizeof(u64),
358 32 * sizeof(u64));
359 else
360 ret = user_regset_copyout_zero(&pos, &count,
361 &kbuf, &ubuf,
362 16 * sizeof(u64),
363 32 * sizeof(u64));
364 }
365
366 if (fprs & FPRS_FEF) {
367 fsr = task_thread_info(target)->xfsr[0];
368 gsr = task_thread_info(target)->gsr[0];
369 } else {
370 fsr = gsr = 0;
371 }
372
373 if (!ret)
374 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
375 &fsr,
376 32 * sizeof(u64),
377 33 * sizeof(u64));
378 if (!ret)
379 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
380 &gsr,
381 33 * sizeof(u64),
382 34 * sizeof(u64));
383 if (!ret)
384 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
385 &fprs,
386 34 * sizeof(u64),
387 35 * sizeof(u64));
388
389 if (!ret)
390 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
391 35 * sizeof(u64), -1);
392
393 return ret;
394}
395
396static int fpregs64_set(struct task_struct *target,
397 const struct user_regset *regset,
398 unsigned int pos, unsigned int count,
399 const void *kbuf, const void __user *ubuf)
400{
401 unsigned long *fpregs = task_thread_info(target)->fpregs;
402 unsigned long fprs;
403 int ret;
404
405 if (target == current)
406 save_and_clear_fpu();
407
408 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
409 fpregs,
410 0, 32 * sizeof(u64));
411 if (!ret)
412 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
413 task_thread_info(target)->xfsr,
414 32 * sizeof(u64),
415 33 * sizeof(u64));
416 if (!ret)
417 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
418 task_thread_info(target)->gsr,
419 33 * sizeof(u64),
420 34 * sizeof(u64));
421
422 fprs = task_thread_info(target)->fpsaved[0];
423 if (!ret && count > 0) {
424 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
425 &fprs,
426 34 * sizeof(u64),
427 35 * sizeof(u64));
428 }
429
430 fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU);
431 task_thread_info(target)->fpsaved[0] = fprs;
432
433 if (!ret)
434 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
435 35 * sizeof(u64), -1);
436 return ret;
437}
438
439static const struct user_regset sparc64_regsets[] = {
440 /* Format is:
441 * G0 --> G7
442 * O0 --> O7
443 * L0 --> L7
444 * I0 --> I7
445 * TSTATE, TPC, TNPC, Y
446 */
447 [REGSET_GENERAL] = {
448 .core_note_type = NT_PRSTATUS,
449 .n = 36,
450 .size = sizeof(u64), .align = sizeof(u64),
451 .get = genregs64_get, .set = genregs64_set
452 },
453 /* Format is:
454 * F0 --> F63
455 * FSR
456 * GSR
457 * FPRS
458 */
459 [REGSET_FP] = {
460 .core_note_type = NT_PRFPREG,
461 .n = 35,
462 .size = sizeof(u64), .align = sizeof(u64),
463 .get = fpregs64_get, .set = fpregs64_set
464 },
465};
466
467static const struct user_regset_view user_sparc64_view = {
468 .name = "sparc64", .e_machine = EM_SPARCV9,
469 .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets)
470};
471
472#ifdef CONFIG_COMPAT
473static int genregs32_get(struct task_struct *target,
474 const struct user_regset *regset,
475 unsigned int pos, unsigned int count,
476 void *kbuf, void __user *ubuf)
477{
478 const struct pt_regs *regs = task_pt_regs(target);
479 compat_ulong_t __user *reg_window;
480 compat_ulong_t *k = kbuf;
481 compat_ulong_t __user *u = ubuf;
482 compat_ulong_t reg;
483
484 if (target == current)
485 flushw_user();
486
487 pos /= sizeof(reg);
488 count /= sizeof(reg);
489
490 if (kbuf) {
491 for (; count > 0 && pos < 16; count--)
492 *k++ = regs->u_regs[pos++];
493
494 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
495 reg_window -= 16;
496 if (target == current) {
497 for (; count > 0 && pos < 32; count--) {
498 if (get_user(*k++, ®_window[pos++]))
499 return -EFAULT;
500 }
501 } else {
502 for (; count > 0 && pos < 32; count--) {
503 if (access_process_vm(target,
504 (unsigned long)
505 ®_window[pos],
506 k, sizeof(*k), 0)
507 != sizeof(*k))
508 return -EFAULT;
509 k++;
510 pos++;
511 }
512 }
513 } else {
514 for (; count > 0 && pos < 16; count--) {
515 if (put_user((compat_ulong_t) regs->u_regs[pos++], u++))
516 return -EFAULT;
517 }
518
519 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
520 reg_window -= 16;
521 if (target == current) {
522 for (; count > 0 && pos < 32; count--) {
523 if (get_user(reg, ®_window[pos++]) ||
524 put_user(reg, u++))
525 return -EFAULT;
526 }
527 } else {
528 for (; count > 0 && pos < 32; count--) {
529 if (access_process_vm(target,
530 (unsigned long)
531 ®_window[pos],
532 ®, sizeof(reg), 0)
533 != sizeof(reg))
534 return -EFAULT;
535 if (access_process_vm(target,
536 (unsigned long) u,
537 ®, sizeof(reg), 1)
538 != sizeof(reg))
539 return -EFAULT;
540 pos++;
541 u++;
542 }
543 }
544 }
545 while (count > 0) {
546 switch (pos) {
547 case 32: /* PSR */
548 reg = tstate_to_psr(regs->tstate);
549 break;
550 case 33: /* PC */
551 reg = regs->tpc;
552 break;
553 case 34: /* NPC */
554 reg = regs->tnpc;
555 break;
556 case 35: /* Y */
557 reg = regs->y;
558 break;
559 case 36: /* WIM */
560 case 37: /* TBR */
561 reg = 0;
562 break;
563 default:
564 goto finish;
565 }
566
567 if (kbuf)
568 *k++ = reg;
569 else if (put_user(reg, u++))
570 return -EFAULT;
571 pos++;
572 count--;
573 }
574finish:
575 pos *= sizeof(reg);
576 count *= sizeof(reg);
577
578 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
579 38 * sizeof(reg), -1);
580}
581
582static int genregs32_set(struct task_struct *target,
583 const struct user_regset *regset,
584 unsigned int pos, unsigned int count,
585 const void *kbuf, const void __user *ubuf)
586{
587 struct pt_regs *regs = task_pt_regs(target);
588 compat_ulong_t __user *reg_window;
589 const compat_ulong_t *k = kbuf;
590 const compat_ulong_t __user *u = ubuf;
591 compat_ulong_t reg;
592
593 if (target == current)
594 flushw_user();
595
596 pos /= sizeof(reg);
597 count /= sizeof(reg);
598
599 if (kbuf) {
600 for (; count > 0 && pos < 16; count--)
601 regs->u_regs[pos++] = *k++;
602
603 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
604 reg_window -= 16;
605 if (target == current) {
606 for (; count > 0 && pos < 32; count--) {
607 if (put_user(*k++, ®_window[pos++]))
608 return -EFAULT;
609 }
610 } else {
611 for (; count > 0 && pos < 32; count--) {
612 if (access_process_vm(target,
613 (unsigned long)
614 ®_window[pos],
615 (void *) k,
616 sizeof(*k), 1)
617 != sizeof(*k))
618 return -EFAULT;
619 k++;
620 pos++;
621 }
622 }
623 } else {
624 for (; count > 0 && pos < 16; count--) {
625 if (get_user(reg, u++))
626 return -EFAULT;
627 regs->u_regs[pos++] = reg;
628 }
629
630 reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];
631 reg_window -= 16;
632 if (target == current) {
633 for (; count > 0 && pos < 32; count--) {
634 if (get_user(reg, u++) ||
635 put_user(reg, ®_window[pos++]))
636 return -EFAULT;
637 }
638 } else {
639 for (; count > 0 && pos < 32; count--) {
640 if (access_process_vm(target,
641 (unsigned long)
642 u,
643 ®, sizeof(reg), 0)
644 != sizeof(reg))
645 return -EFAULT;
646 if (access_process_vm(target,
647 (unsigned long)
648 ®_window[pos],
649 ®, sizeof(reg), 1)
650 != sizeof(reg))
651 return -EFAULT;
652 pos++;
653 u++;
654 }
655 }
656 }
657 while (count > 0) {
658 unsigned long tstate;
659
660 if (kbuf)
661 reg = *k++;
662 else if (get_user(reg, u++))
663 return -EFAULT;
664
665 switch (pos) {
666 case 32: /* PSR */
667 tstate = regs->tstate;
668 tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);
669 tstate |= psr_to_tstate_icc(reg);
670 if (reg & PSR_SYSCALL)
671 tstate |= TSTATE_SYSCALL;
672 regs->tstate = tstate;
673 break;
674 case 33: /* PC */
675 regs->tpc = reg;
676 break;
677 case 34: /* NPC */
678 regs->tnpc = reg;
679 break;
680 case 35: /* Y */
681 regs->y = reg;
682 break;
683 case 36: /* WIM */
684 case 37: /* TBR */
685 break;
686 default:
687 goto finish;
688 }
689
690 pos++;
691 count--;
692 }
693finish:
694 pos *= sizeof(reg);
695 count *= sizeof(reg);
696
697 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
698 38 * sizeof(reg), -1);
699}
700
701static int fpregs32_get(struct task_struct *target,
702 const struct user_regset *regset,
703 unsigned int pos, unsigned int count,
704 void *kbuf, void __user *ubuf)
705{
706 const unsigned long *fpregs = task_thread_info(target)->fpregs;
707 compat_ulong_t enabled;
708 unsigned long fprs;
709 compat_ulong_t fsr;
710 int ret = 0;
711
712 if (target == current)
713 save_and_clear_fpu();
714
715 fprs = task_thread_info(target)->fpsaved[0];
716 if (fprs & FPRS_FEF) {
717 fsr = task_thread_info(target)->xfsr[0];
718 enabled = 1;
719 } else {
720 fsr = 0;
721 enabled = 0;
722 }
723
724 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
725 fpregs,
726 0, 32 * sizeof(u32));
727
728 if (!ret)
729 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
730 32 * sizeof(u32),
731 33 * sizeof(u32));
732 if (!ret)
733 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
734 &fsr,
735 33 * sizeof(u32),
736 34 * sizeof(u32));
737
738 if (!ret) {
739 compat_ulong_t val;
740
741 val = (enabled << 8) | (8 << 16);
742 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
743 &val,
744 34 * sizeof(u32),
745 35 * sizeof(u32));
746 }
747
748 if (!ret)
749 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
750 35 * sizeof(u32), -1);
751
752 return ret;
753}
754
755static int fpregs32_set(struct task_struct *target,
756 const struct user_regset *regset,
757 unsigned int pos, unsigned int count,
758 const void *kbuf, const void __user *ubuf)
759{
760 unsigned long *fpregs = task_thread_info(target)->fpregs;
761 unsigned long fprs;
762 int ret;
763
764 if (target == current)
765 save_and_clear_fpu();
766
767 fprs = task_thread_info(target)->fpsaved[0];
768
769 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
770 fpregs,
771 0, 32 * sizeof(u32));
772 if (!ret)
773 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
774 32 * sizeof(u32),
775 33 * sizeof(u32));
776 if (!ret && count > 0) {
777 compat_ulong_t fsr;
778 unsigned long val;
779
780 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
781 &fsr,
782 33 * sizeof(u32),
783 34 * sizeof(u32));
784 if (!ret) {
785 val = task_thread_info(target)->xfsr[0];
786 val &= 0xffffffff00000000UL;
787 val |= fsr;
788 task_thread_info(target)->xfsr[0] = val;
789 }
790 }
791
792 fprs |= (FPRS_FEF | FPRS_DL);
793 task_thread_info(target)->fpsaved[0] = fprs;
794
795 if (!ret)
796 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
797 34 * sizeof(u32), -1);
798 return ret;
799}
800
801static const struct user_regset sparc32_regsets[] = {
802 /* Format is:
803 * G0 --> G7
804 * O0 --> O7
805 * L0 --> L7
806 * I0 --> I7
807 * PSR, PC, nPC, Y, WIM, TBR
808 */
809 [REGSET_GENERAL] = {
810 .core_note_type = NT_PRSTATUS,
811 .n = 38,
812 .size = sizeof(u32), .align = sizeof(u32),
813 .get = genregs32_get, .set = genregs32_set
814 },
815 /* Format is:
816 * F0 --> F31
817 * empty 32-bit word
818 * FSR (32--bit word)
819 * FPU QUEUE COUNT (8-bit char)
820 * FPU QUEUE ENTRYSIZE (8-bit char)
821 * FPU ENABLED (8-bit char)
822 * empty 8-bit char
823 * FPU QUEUE (64 32-bit ints)
824 */
825 [REGSET_FP] = {
826 .core_note_type = NT_PRFPREG,
827 .n = 99,
828 .size = sizeof(u32), .align = sizeof(u32),
829 .get = fpregs32_get, .set = fpregs32_set
830 },
831};
832
833static const struct user_regset_view user_sparc32_view = {
834 .name = "sparc", .e_machine = EM_SPARC,
835 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
836};
837#endif /* CONFIG_COMPAT */
838
839const struct user_regset_view *task_user_regset_view(struct task_struct *task)
840{
841#ifdef CONFIG_COMPAT
842 if (test_tsk_thread_flag(task, TIF_32BIT))
843 return &user_sparc32_view;
844#endif
845 return &user_sparc64_view;
846}
847
848#ifdef CONFIG_COMPAT
849struct compat_fps {
850 unsigned int regs[32];
851 unsigned int fsr;
852 unsigned int flags;
853 unsigned int extra;
854 unsigned int fpqd;
855 struct compat_fq {
856 unsigned int insnaddr;
857 unsigned int insn;
858 } fpq[16];
859};
860
861long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
862 compat_ulong_t caddr, compat_ulong_t cdata)
863{
864 const struct user_regset_view *view = task_user_regset_view(current);
865 compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];
866 struct pt_regs32 __user *pregs;
867 struct compat_fps __user *fps;
868 unsigned long addr2 = caddr2;
869 unsigned long addr = caddr;
870 unsigned long data = cdata;
871 int ret;
872
873 pregs = (struct pt_regs32 __user *) addr;
874 fps = (struct compat_fps __user *) addr;
875
876 switch (request) {
877 case PTRACE_PEEKUSR:
878 ret = (addr != 0) ? -EIO : 0;
879 break;
880
881 case PTRACE_GETREGS:
882 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
883 32 * sizeof(u32),
884 4 * sizeof(u32),
885 &pregs->psr);
886 if (!ret)
887 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
888 1 * sizeof(u32),
889 15 * sizeof(u32),
890 &pregs->u_regs[0]);
891 break;
892
893 case PTRACE_SETREGS:
894 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
895 32 * sizeof(u32),
896 4 * sizeof(u32),
897 &pregs->psr);
898 if (!ret)
899 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
900 1 * sizeof(u32),
901 15 * sizeof(u32),
902 &pregs->u_regs[0]);
903 break;
904
905 case PTRACE_GETFPREGS:
906 ret = copy_regset_to_user(child, view, REGSET_FP,
907 0 * sizeof(u32),
908 32 * sizeof(u32),
909 &fps->regs[0]);
910 if (!ret)
911 ret = copy_regset_to_user(child, view, REGSET_FP,
912 33 * sizeof(u32),
913 1 * sizeof(u32),
914 &fps->fsr);
915 if (!ret) {
916 if (__put_user(0, &fps->flags) ||
917 __put_user(0, &fps->extra) ||
918 __put_user(0, &fps->fpqd) ||
919 clear_user(&fps->fpq[0], 32 * sizeof(unsigned int)))
920 ret = -EFAULT;
921 }
922 break;
923
924 case PTRACE_SETFPREGS:
925 ret = copy_regset_from_user(child, view, REGSET_FP,
926 0 * sizeof(u32),
927 32 * sizeof(u32),
928 &fps->regs[0]);
929 if (!ret)
930 ret = copy_regset_from_user(child, view, REGSET_FP,
931 33 * sizeof(u32),
932 1 * sizeof(u32),
933 &fps->fsr);
934 break;
935
936 case PTRACE_READTEXT:
937 case PTRACE_READDATA:
938 ret = ptrace_readdata(child, addr,
939 (char __user *)addr2, data);
940 if (ret == data)
941 ret = 0;
942 else if (ret >= 0)
943 ret = -EIO;
944 break;
945
946 case PTRACE_WRITETEXT:
947 case PTRACE_WRITEDATA:
948 ret = ptrace_writedata(child, (char __user *) addr2,
949 addr, data);
950 if (ret == data)
951 ret = 0;
952 else if (ret >= 0)
953 ret = -EIO;
954 break;
955
956 default:
957 if (request == PTRACE_SPARC_DETACH)
958 request = PTRACE_DETACH;
959 ret = compat_ptrace_request(child, request, addr, data);
960 break;
961 }
962
963 return ret;
964}
965#endif /* CONFIG_COMPAT */
966
967struct fps {
968 unsigned int regs[64];
969 unsigned long fsr;
970};
971
972long arch_ptrace(struct task_struct *child, long request,
973 unsigned long addr, unsigned long data)
974{
975 const struct user_regset_view *view = task_user_regset_view(current);
976 unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];
977 struct pt_regs __user *pregs;
978 struct fps __user *fps;
979 void __user *addr2p;
980 int ret;
981
982 pregs = (struct pt_regs __user *) addr;
983 fps = (struct fps __user *) addr;
984 addr2p = (void __user *) addr2;
985
986 switch (request) {
987 case PTRACE_PEEKUSR:
988 ret = (addr != 0) ? -EIO : 0;
989 break;
990
991 case PTRACE_GETREGS64:
992 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
993 1 * sizeof(u64),
994 15 * sizeof(u64),
995 &pregs->u_regs[0]);
996 if (!ret) {
997 /* XXX doesn't handle 'y' register correctly XXX */
998 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
999 32 * sizeof(u64),
1000 4 * sizeof(u64),
1001 &pregs->tstate);
1002 }
1003 break;
1004
1005 case PTRACE_SETREGS64:
1006 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1007 1 * sizeof(u64),
1008 15 * sizeof(u64),
1009 &pregs->u_regs[0]);
1010 if (!ret) {
1011 /* XXX doesn't handle 'y' register correctly XXX */
1012 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
1013 32 * sizeof(u64),
1014 4 * sizeof(u64),
1015 &pregs->tstate);
1016 }
1017 break;
1018
1019 case PTRACE_GETFPREGS64:
1020 ret = copy_regset_to_user(child, view, REGSET_FP,
1021 0 * sizeof(u64),
1022 33 * sizeof(u64),
1023 fps);
1024 break;
1025
1026 case PTRACE_SETFPREGS64:
1027 ret = copy_regset_from_user(child, view, REGSET_FP,
1028 0 * sizeof(u64),
1029 33 * sizeof(u64),
1030 fps);
1031 break;
1032
1033 case PTRACE_READTEXT:
1034 case PTRACE_READDATA:
1035 ret = ptrace_readdata(child, addr, addr2p, data);
1036 if (ret == data)
1037 ret = 0;
1038 else if (ret >= 0)
1039 ret = -EIO;
1040 break;
1041
1042 case PTRACE_WRITETEXT:
1043 case PTRACE_WRITEDATA:
1044 ret = ptrace_writedata(child, addr2p, addr, data);
1045 if (ret == data)
1046 ret = 0;
1047 else if (ret >= 0)
1048 ret = -EIO;
1049 break;
1050
1051 default:
1052 if (request == PTRACE_SPARC_DETACH)
1053 request = PTRACE_DETACH;
1054 ret = ptrace_request(child, request, addr, data);
1055 break;
1056 }
1057
1058 return ret;
1059}
1060
1061asmlinkage int syscall_trace_enter(struct pt_regs *regs)
1062{
1063 int ret = 0;
1064
1065 /* do the secure computing check first */
1066 secure_computing(regs->u_regs[UREG_G1]);
1067
1068 if (test_thread_flag(TIF_SYSCALL_TRACE))
1069 ret = tracehook_report_syscall_entry(regs);
1070
1071 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1072 trace_sys_enter(regs, regs->u_regs[UREG_G1]);
1073
1074 if (unlikely(current->audit_context) && !ret)
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
1087asmlinkage void syscall_trace_leave(struct pt_regs *regs)
1088{
1089#ifdef CONFIG_AUDITSYSCALL
1090 if (unlikely(current->audit_context)) {
1091 unsigned long tstate = regs->tstate;
1092 int result = AUDITSC_SUCCESS;
1093
1094 if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY)))
1095 result = AUDITSC_FAILURE;
1096
1097 audit_syscall_exit(result, regs->u_regs[UREG_I0]);
1098 }
1099#endif
1100 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
1101 trace_sys_exit(regs, regs->u_regs[UREG_G1]);
1102
1103 if (test_thread_flag(TIF_SYSCALL_TRACE))
1104 tracehook_report_syscall_exit(regs, 0);
1105}