1
2
3#include <linux/regset.h>
4#include <linux/elf.h>
5#include <linux/nospec.h>
6#include <linux/pkeys.h>
7
8#include "ptrace-decl.h"
9
10struct pt_regs_offset {
11 const char *name;
12 int offset;
13};
14
15#define STR(s) #s
16#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
17#define GPR_OFFSET_NAME(num) \
18 {.name = STR(r##num), .offset = offsetof(struct pt_regs, gpr[num])}, \
19 {.name = STR(gpr##num), .offset = offsetof(struct pt_regs, gpr[num])}
20#define REG_OFFSET_END {.name = NULL, .offset = 0}
21
22static const struct pt_regs_offset regoffset_table[] = {
23 GPR_OFFSET_NAME(0),
24 GPR_OFFSET_NAME(1),
25 GPR_OFFSET_NAME(2),
26 GPR_OFFSET_NAME(3),
27 GPR_OFFSET_NAME(4),
28 GPR_OFFSET_NAME(5),
29 GPR_OFFSET_NAME(6),
30 GPR_OFFSET_NAME(7),
31 GPR_OFFSET_NAME(8),
32 GPR_OFFSET_NAME(9),
33 GPR_OFFSET_NAME(10),
34 GPR_OFFSET_NAME(11),
35 GPR_OFFSET_NAME(12),
36 GPR_OFFSET_NAME(13),
37 GPR_OFFSET_NAME(14),
38 GPR_OFFSET_NAME(15),
39 GPR_OFFSET_NAME(16),
40 GPR_OFFSET_NAME(17),
41 GPR_OFFSET_NAME(18),
42 GPR_OFFSET_NAME(19),
43 GPR_OFFSET_NAME(20),
44 GPR_OFFSET_NAME(21),
45 GPR_OFFSET_NAME(22),
46 GPR_OFFSET_NAME(23),
47 GPR_OFFSET_NAME(24),
48 GPR_OFFSET_NAME(25),
49 GPR_OFFSET_NAME(26),
50 GPR_OFFSET_NAME(27),
51 GPR_OFFSET_NAME(28),
52 GPR_OFFSET_NAME(29),
53 GPR_OFFSET_NAME(30),
54 GPR_OFFSET_NAME(31),
55 REG_OFFSET_NAME(nip),
56 REG_OFFSET_NAME(msr),
57 REG_OFFSET_NAME(ctr),
58 REG_OFFSET_NAME(link),
59 REG_OFFSET_NAME(xer),
60 REG_OFFSET_NAME(ccr),
61#ifdef CONFIG_PPC64
62 REG_OFFSET_NAME(softe),
63#else
64 REG_OFFSET_NAME(mq),
65#endif
66 REG_OFFSET_NAME(trap),
67 REG_OFFSET_NAME(dar),
68 REG_OFFSET_NAME(dsisr),
69 REG_OFFSET_END,
70};
71
72
73
74
75
76
77
78
79int regs_query_register_offset(const char *name)
80{
81 const struct pt_regs_offset *roff;
82 for (roff = regoffset_table; roff->name != NULL; roff++)
83 if (!strcmp(roff->name, name))
84 return roff->offset;
85 return -EINVAL;
86}
87
88
89
90
91
92
93
94
95const char *regs_query_register_name(unsigned int offset)
96{
97 const struct pt_regs_offset *roff;
98 for (roff = regoffset_table; roff->name != NULL; roff++)
99 if (roff->offset == offset)
100 return roff->name;
101 return NULL;
102}
103
104
105
106
107
108
109static unsigned long get_user_msr(struct task_struct *task)
110{
111 return task->thread.regs->msr | task->thread.fpexc_mode;
112}
113
114static __always_inline int set_user_msr(struct task_struct *task, unsigned long msr)
115{
116 unsigned long newmsr = (task->thread.regs->msr & ~MSR_DEBUGCHANGE) |
117 (msr & MSR_DEBUGCHANGE);
118 regs_set_return_msr(task->thread.regs, newmsr);
119 return 0;
120}
121
122#ifdef CONFIG_PPC64
123static int get_user_dscr(struct task_struct *task, unsigned long *data)
124{
125 *data = task->thread.dscr;
126 return 0;
127}
128
129static int set_user_dscr(struct task_struct *task, unsigned long dscr)
130{
131 task->thread.dscr = dscr;
132 task->thread.dscr_inherit = 1;
133 return 0;
134}
135#else
136static int get_user_dscr(struct task_struct *task, unsigned long *data)
137{
138 return -EIO;
139}
140
141static int set_user_dscr(struct task_struct *task, unsigned long dscr)
142{
143 return -EIO;
144}
145#endif
146
147
148
149
150
151static __always_inline int set_user_trap(struct task_struct *task, unsigned long trap)
152{
153 set_trap(task->thread.regs, trap);
154 return 0;
155}
156
157
158
159
160int ptrace_get_reg(struct task_struct *task, int regno, unsigned long *data)
161{
162 unsigned int regs_max;
163
164 if (task->thread.regs == NULL || !data)
165 return -EIO;
166
167 if (regno == PT_MSR) {
168 *data = get_user_msr(task);
169 return 0;
170 }
171
172 if (regno == PT_DSCR)
173 return get_user_dscr(task, data);
174
175
176
177
178
179
180 if (IS_ENABLED(CONFIG_PPC64) && regno == PT_SOFTE) {
181 *data = 1;
182 return 0;
183 }
184
185 regs_max = sizeof(struct user_pt_regs) / sizeof(unsigned long);
186 if (regno < regs_max) {
187 regno = array_index_nospec(regno, regs_max);
188 *data = ((unsigned long *)task->thread.regs)[regno];
189 return 0;
190 }
191
192 return -EIO;
193}
194
195
196
197
198int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
199{
200 if (task->thread.regs == NULL)
201 return -EIO;
202
203 if (regno == PT_MSR)
204 return set_user_msr(task, data);
205 if (regno == PT_TRAP)
206 return set_user_trap(task, data);
207 if (regno == PT_DSCR)
208 return set_user_dscr(task, data);
209
210 if (regno <= PT_MAX_PUT_REG) {
211 regno = array_index_nospec(regno, PT_MAX_PUT_REG + 1);
212 ((unsigned long *)task->thread.regs)[regno] = data;
213 return 0;
214 }
215 return -EIO;
216}
217
218static int gpr_get(struct task_struct *target, const struct user_regset *regset,
219 struct membuf to)
220{
221 struct membuf to_msr = membuf_at(&to, offsetof(struct pt_regs, msr));
222#ifdef CONFIG_PPC64
223 struct membuf to_softe = membuf_at(&to, offsetof(struct pt_regs, softe));
224#endif
225 if (target->thread.regs == NULL)
226 return -EIO;
227
228 membuf_write(&to, target->thread.regs, sizeof(struct user_pt_regs));
229
230 membuf_store(&to_msr, get_user_msr(target));
231#ifdef CONFIG_PPC64
232 membuf_store(&to_softe, 0x1ul);
233#endif
234 return membuf_zero(&to, ELF_NGREG * sizeof(unsigned long) -
235 sizeof(struct user_pt_regs));
236}
237
238static int gpr_set(struct task_struct *target, const struct user_regset *regset,
239 unsigned int pos, unsigned int count, const void *kbuf,
240 const void __user *ubuf)
241{
242 unsigned long reg;
243 int ret;
244
245 if (target->thread.regs == NULL)
246 return -EIO;
247
248 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
249 target->thread.regs,
250 0, PT_MSR * sizeof(reg));
251
252 if (!ret && count > 0) {
253 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
254 PT_MSR * sizeof(reg),
255 (PT_MSR + 1) * sizeof(reg));
256 if (!ret)
257 ret = set_user_msr(target, reg);
258 }
259
260 BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
261 offsetof(struct pt_regs, msr) + sizeof(long));
262
263 if (!ret)
264 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
265 &target->thread.regs->orig_gpr3,
266 PT_ORIG_R3 * sizeof(reg),
267 (PT_MAX_PUT_REG + 1) * sizeof(reg));
268
269 if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
270 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
271 (PT_MAX_PUT_REG + 1) * sizeof(reg),
272 PT_TRAP * sizeof(reg));
273
274 if (!ret && count > 0) {
275 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
276 PT_TRAP * sizeof(reg),
277 (PT_TRAP + 1) * sizeof(reg));
278 if (!ret)
279 ret = set_user_trap(target, reg);
280 }
281
282 if (!ret)
283 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
284 (PT_TRAP + 1) * sizeof(reg), -1);
285
286 return ret;
287}
288
289#ifdef CONFIG_PPC64
290static int ppr_get(struct task_struct *target, const struct user_regset *regset,
291 struct membuf to)
292{
293 return membuf_write(&to, &target->thread.regs->ppr, sizeof(u64));
294}
295
296static int ppr_set(struct task_struct *target, const struct user_regset *regset,
297 unsigned int pos, unsigned int count, const void *kbuf,
298 const void __user *ubuf)
299{
300 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
301 &target->thread.regs->ppr, 0, sizeof(u64));
302}
303
304static int dscr_get(struct task_struct *target, const struct user_regset *regset,
305 struct membuf to)
306{
307 return membuf_write(&to, &target->thread.dscr, sizeof(u64));
308}
309static int dscr_set(struct task_struct *target, const struct user_regset *regset,
310 unsigned int pos, unsigned int count, const void *kbuf,
311 const void __user *ubuf)
312{
313 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
314 &target->thread.dscr, 0, sizeof(u64));
315}
316#endif
317#ifdef CONFIG_PPC_BOOK3S_64
318static int tar_get(struct task_struct *target, const struct user_regset *regset,
319 struct membuf to)
320{
321 return membuf_write(&to, &target->thread.tar, sizeof(u64));
322}
323static int tar_set(struct task_struct *target, const struct user_regset *regset,
324 unsigned int pos, unsigned int count, const void *kbuf,
325 const void __user *ubuf)
326{
327 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
328 &target->thread.tar, 0, sizeof(u64));
329}
330
331static int ebb_active(struct task_struct *target, const struct user_regset *regset)
332{
333 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
334 return -ENODEV;
335
336 if (target->thread.used_ebb)
337 return regset->n;
338
339 return 0;
340}
341
342static int ebb_get(struct task_struct *target, const struct user_regset *regset,
343 struct membuf to)
344{
345
346 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
347 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
348
349 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
350 return -ENODEV;
351
352 if (!target->thread.used_ebb)
353 return -ENODATA;
354
355 return membuf_write(&to, &target->thread.ebbrr, 3 * sizeof(unsigned long));
356}
357
358static int ebb_set(struct task_struct *target, const struct user_regset *regset,
359 unsigned int pos, unsigned int count, const void *kbuf,
360 const void __user *ubuf)
361{
362 int ret = 0;
363
364
365 BUILD_BUG_ON(TSO(ebbrr) + sizeof(unsigned long) != TSO(ebbhr));
366 BUILD_BUG_ON(TSO(ebbhr) + sizeof(unsigned long) != TSO(bescr));
367
368 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
369 return -ENODEV;
370
371 if (target->thread.used_ebb)
372 return -ENODATA;
373
374 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.ebbrr,
375 0, sizeof(unsigned long));
376
377 if (!ret)
378 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
379 &target->thread.ebbhr, sizeof(unsigned long),
380 2 * sizeof(unsigned long));
381
382 if (!ret)
383 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
384 &target->thread.bescr, 2 * sizeof(unsigned long),
385 3 * sizeof(unsigned long));
386
387 return ret;
388}
389static int pmu_active(struct task_struct *target, const struct user_regset *regset)
390{
391 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
392 return -ENODEV;
393
394 return regset->n;
395}
396
397static int pmu_get(struct task_struct *target, const struct user_regset *regset,
398 struct membuf to)
399{
400
401 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
402 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
403 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
404 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
405
406 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
407 return -ENODEV;
408
409 return membuf_write(&to, &target->thread.siar, 5 * sizeof(unsigned long));
410}
411
412static int pmu_set(struct task_struct *target, const struct user_regset *regset,
413 unsigned int pos, unsigned int count, const void *kbuf,
414 const void __user *ubuf)
415{
416 int ret = 0;
417
418
419 BUILD_BUG_ON(TSO(siar) + sizeof(unsigned long) != TSO(sdar));
420 BUILD_BUG_ON(TSO(sdar) + sizeof(unsigned long) != TSO(sier));
421 BUILD_BUG_ON(TSO(sier) + sizeof(unsigned long) != TSO(mmcr2));
422 BUILD_BUG_ON(TSO(mmcr2) + sizeof(unsigned long) != TSO(mmcr0));
423
424 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
425 return -ENODEV;
426
427 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.siar,
428 0, sizeof(unsigned long));
429
430 if (!ret)
431 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
432 &target->thread.sdar, sizeof(unsigned long),
433 2 * sizeof(unsigned long));
434
435 if (!ret)
436 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
437 &target->thread.sier, 2 * sizeof(unsigned long),
438 3 * sizeof(unsigned long));
439
440 if (!ret)
441 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
442 &target->thread.mmcr2, 3 * sizeof(unsigned long),
443 4 * sizeof(unsigned long));
444
445 if (!ret)
446 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
447 &target->thread.mmcr0, 4 * sizeof(unsigned long),
448 5 * sizeof(unsigned long));
449 return ret;
450}
451#endif
452
453#ifdef CONFIG_PPC_MEM_KEYS
454static int pkey_active(struct task_struct *target, const struct user_regset *regset)
455{
456 if (!arch_pkeys_enabled())
457 return -ENODEV;
458
459 return regset->n;
460}
461
462static int pkey_get(struct task_struct *target, const struct user_regset *regset,
463 struct membuf to)
464{
465
466 if (!arch_pkeys_enabled())
467 return -ENODEV;
468
469 membuf_store(&to, target->thread.regs->amr);
470 membuf_store(&to, target->thread.regs->iamr);
471 return membuf_store(&to, default_uamor);
472}
473
474static int pkey_set(struct task_struct *target, const struct user_regset *regset,
475 unsigned int pos, unsigned int count, const void *kbuf,
476 const void __user *ubuf)
477{
478 u64 new_amr;
479 int ret;
480
481 if (!arch_pkeys_enabled())
482 return -ENODEV;
483
484
485 if (pos != 0 || count != sizeof(new_amr))
486 return -EINVAL;
487
488 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
489 &new_amr, 0, sizeof(new_amr));
490 if (ret)
491 return ret;
492
493
494
495
496
497
498
499
500
501
502
503 target->thread.regs->amr = (new_amr & default_uamor) |
504 (target->thread.regs->amr & ~default_uamor);
505
506 return 0;
507}
508#endif
509
510static const struct user_regset native_regsets[] = {
511 [REGSET_GPR] = {
512 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
513 .size = sizeof(long), .align = sizeof(long),
514 .regset_get = gpr_get, .set = gpr_set
515 },
516 [REGSET_FPR] = {
517 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
518 .size = sizeof(double), .align = sizeof(double),
519 .regset_get = fpr_get, .set = fpr_set
520 },
521#ifdef CONFIG_ALTIVEC
522 [REGSET_VMX] = {
523 .core_note_type = NT_PPC_VMX, .n = 34,
524 .size = sizeof(vector128), .align = sizeof(vector128),
525 .active = vr_active, .regset_get = vr_get, .set = vr_set
526 },
527#endif
528#ifdef CONFIG_VSX
529 [REGSET_VSX] = {
530 .core_note_type = NT_PPC_VSX, .n = 32,
531 .size = sizeof(double), .align = sizeof(double),
532 .active = vsr_active, .regset_get = vsr_get, .set = vsr_set
533 },
534#endif
535#ifdef CONFIG_SPE
536 [REGSET_SPE] = {
537 .core_note_type = NT_PPC_SPE, .n = 35,
538 .size = sizeof(u32), .align = sizeof(u32),
539 .active = evr_active, .regset_get = evr_get, .set = evr_set
540 },
541#endif
542#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
543 [REGSET_TM_CGPR] = {
544 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
545 .size = sizeof(long), .align = sizeof(long),
546 .active = tm_cgpr_active, .regset_get = tm_cgpr_get, .set = tm_cgpr_set
547 },
548 [REGSET_TM_CFPR] = {
549 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
550 .size = sizeof(double), .align = sizeof(double),
551 .active = tm_cfpr_active, .regset_get = tm_cfpr_get, .set = tm_cfpr_set
552 },
553 [REGSET_TM_CVMX] = {
554 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
555 .size = sizeof(vector128), .align = sizeof(vector128),
556 .active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set
557 },
558 [REGSET_TM_CVSX] = {
559 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
560 .size = sizeof(double), .align = sizeof(double),
561 .active = tm_cvsx_active, .regset_get = tm_cvsx_get, .set = tm_cvsx_set
562 },
563 [REGSET_TM_SPR] = {
564 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
565 .size = sizeof(u64), .align = sizeof(u64),
566 .active = tm_spr_active, .regset_get = tm_spr_get, .set = tm_spr_set
567 },
568 [REGSET_TM_CTAR] = {
569 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
570 .size = sizeof(u64), .align = sizeof(u64),
571 .active = tm_tar_active, .regset_get = tm_tar_get, .set = tm_tar_set
572 },
573 [REGSET_TM_CPPR] = {
574 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
575 .size = sizeof(u64), .align = sizeof(u64),
576 .active = tm_ppr_active, .regset_get = tm_ppr_get, .set = tm_ppr_set
577 },
578 [REGSET_TM_CDSCR] = {
579 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
580 .size = sizeof(u64), .align = sizeof(u64),
581 .active = tm_dscr_active, .regset_get = tm_dscr_get, .set = tm_dscr_set
582 },
583#endif
584#ifdef CONFIG_PPC64
585 [REGSET_PPR] = {
586 .core_note_type = NT_PPC_PPR, .n = 1,
587 .size = sizeof(u64), .align = sizeof(u64),
588 .regset_get = ppr_get, .set = ppr_set
589 },
590 [REGSET_DSCR] = {
591 .core_note_type = NT_PPC_DSCR, .n = 1,
592 .size = sizeof(u64), .align = sizeof(u64),
593 .regset_get = dscr_get, .set = dscr_set
594 },
595#endif
596#ifdef CONFIG_PPC_BOOK3S_64
597 [REGSET_TAR] = {
598 .core_note_type = NT_PPC_TAR, .n = 1,
599 .size = sizeof(u64), .align = sizeof(u64),
600 .regset_get = tar_get, .set = tar_set
601 },
602 [REGSET_EBB] = {
603 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
604 .size = sizeof(u64), .align = sizeof(u64),
605 .active = ebb_active, .regset_get = ebb_get, .set = ebb_set
606 },
607 [REGSET_PMR] = {
608 .core_note_type = NT_PPC_PMU, .n = ELF_NPMU,
609 .size = sizeof(u64), .align = sizeof(u64),
610 .active = pmu_active, .regset_get = pmu_get, .set = pmu_set
611 },
612#endif
613#ifdef CONFIG_PPC_MEM_KEYS
614 [REGSET_PKEY] = {
615 .core_note_type = NT_PPC_PKEY, .n = ELF_NPKEY,
616 .size = sizeof(u64), .align = sizeof(u64),
617 .active = pkey_active, .regset_get = pkey_get, .set = pkey_set
618 },
619#endif
620};
621
622const struct user_regset_view user_ppc_native_view = {
623 .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
624 .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
625};
626
627#include <linux/compat.h>
628
629int gpr32_get_common(struct task_struct *target,
630 const struct user_regset *regset,
631 struct membuf to, unsigned long *regs)
632{
633 int i;
634
635 for (i = 0; i < PT_MSR; i++)
636 membuf_store(&to, (u32)regs[i]);
637 membuf_store(&to, (u32)get_user_msr(target));
638 for (i++ ; i < PT_REGS_COUNT; i++)
639 membuf_store(&to, (u32)regs[i]);
640 return membuf_zero(&to, (ELF_NGREG - PT_REGS_COUNT) * sizeof(u32));
641}
642
643int gpr32_set_common(struct task_struct *target,
644 const struct user_regset *regset,
645 unsigned int pos, unsigned int count,
646 const void *kbuf, const void __user *ubuf,
647 unsigned long *regs)
648{
649 const compat_ulong_t *k = kbuf;
650 const compat_ulong_t __user *u = ubuf;
651 compat_ulong_t reg;
652
653 if (!kbuf && !user_read_access_begin(u, count))
654 return -EFAULT;
655
656 pos /= sizeof(reg);
657 count /= sizeof(reg);
658
659 if (kbuf)
660 for (; count > 0 && pos < PT_MSR; --count)
661 regs[pos++] = *k++;
662 else
663 for (; count > 0 && pos < PT_MSR; --count) {
664 unsafe_get_user(reg, u++, Efault);
665 regs[pos++] = reg;
666 }
667
668
669 if (count > 0 && pos == PT_MSR) {
670 if (kbuf)
671 reg = *k++;
672 else
673 unsafe_get_user(reg, u++, Efault);
674 set_user_msr(target, reg);
675 ++pos;
676 --count;
677 }
678
679 if (kbuf) {
680 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
681 regs[pos++] = *k++;
682 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
683 ++k;
684 } else {
685 for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
686 unsafe_get_user(reg, u++, Efault);
687 regs[pos++] = reg;
688 }
689 for (; count > 0 && pos < PT_TRAP; --count, ++pos)
690 unsafe_get_user(reg, u++, Efault);
691 }
692
693 if (count > 0 && pos == PT_TRAP) {
694 if (kbuf)
695 reg = *k++;
696 else
697 unsafe_get_user(reg, u++, Efault);
698 set_user_trap(target, reg);
699 ++pos;
700 --count;
701 }
702 if (!kbuf)
703 user_read_access_end();
704
705 kbuf = k;
706 ubuf = u;
707 pos *= sizeof(reg);
708 count *= sizeof(reg);
709 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
710 (PT_TRAP + 1) * sizeof(reg), -1);
711
712Efault:
713 user_read_access_end();
714 return -EFAULT;
715}
716
717static int gpr32_get(struct task_struct *target,
718 const struct user_regset *regset,
719 struct membuf to)
720{
721 if (target->thread.regs == NULL)
722 return -EIO;
723
724 return gpr32_get_common(target, regset, to,
725 &target->thread.regs->gpr[0]);
726}
727
728static int gpr32_set(struct task_struct *target,
729 const struct user_regset *regset,
730 unsigned int pos, unsigned int count,
731 const void *kbuf, const void __user *ubuf)
732{
733 if (target->thread.regs == NULL)
734 return -EIO;
735
736 return gpr32_set_common(target, regset, pos, count, kbuf, ubuf,
737 &target->thread.regs->gpr[0]);
738}
739
740
741
742
743static const struct user_regset compat_regsets[] = {
744 [REGSET_GPR] = {
745 .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
746 .size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
747 .regset_get = gpr32_get, .set = gpr32_set
748 },
749 [REGSET_FPR] = {
750 .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
751 .size = sizeof(double), .align = sizeof(double),
752 .regset_get = fpr_get, .set = fpr_set
753 },
754#ifdef CONFIG_ALTIVEC
755 [REGSET_VMX] = {
756 .core_note_type = NT_PPC_VMX, .n = 34,
757 .size = sizeof(vector128), .align = sizeof(vector128),
758 .active = vr_active, .regset_get = vr_get, .set = vr_set
759 },
760#endif
761#ifdef CONFIG_SPE
762 [REGSET_SPE] = {
763 .core_note_type = NT_PPC_SPE, .n = 35,
764 .size = sizeof(u32), .align = sizeof(u32),
765 .active = evr_active, .regset_get = evr_get, .set = evr_set
766 },
767#endif
768#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
769 [REGSET_TM_CGPR] = {
770 .core_note_type = NT_PPC_TM_CGPR, .n = ELF_NGREG,
771 .size = sizeof(long), .align = sizeof(long),
772 .active = tm_cgpr_active,
773 .regset_get = tm_cgpr32_get, .set = tm_cgpr32_set
774 },
775 [REGSET_TM_CFPR] = {
776 .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
777 .size = sizeof(double), .align = sizeof(double),
778 .active = tm_cfpr_active, .regset_get = tm_cfpr_get, .set = tm_cfpr_set
779 },
780 [REGSET_TM_CVMX] = {
781 .core_note_type = NT_PPC_TM_CVMX, .n = ELF_NVMX,
782 .size = sizeof(vector128), .align = sizeof(vector128),
783 .active = tm_cvmx_active, .regset_get = tm_cvmx_get, .set = tm_cvmx_set
784 },
785 [REGSET_TM_CVSX] = {
786 .core_note_type = NT_PPC_TM_CVSX, .n = ELF_NVSX,
787 .size = sizeof(double), .align = sizeof(double),
788 .active = tm_cvsx_active, .regset_get = tm_cvsx_get, .set = tm_cvsx_set
789 },
790 [REGSET_TM_SPR] = {
791 .core_note_type = NT_PPC_TM_SPR, .n = ELF_NTMSPRREG,
792 .size = sizeof(u64), .align = sizeof(u64),
793 .active = tm_spr_active, .regset_get = tm_spr_get, .set = tm_spr_set
794 },
795 [REGSET_TM_CTAR] = {
796 .core_note_type = NT_PPC_TM_CTAR, .n = 1,
797 .size = sizeof(u64), .align = sizeof(u64),
798 .active = tm_tar_active, .regset_get = tm_tar_get, .set = tm_tar_set
799 },
800 [REGSET_TM_CPPR] = {
801 .core_note_type = NT_PPC_TM_CPPR, .n = 1,
802 .size = sizeof(u64), .align = sizeof(u64),
803 .active = tm_ppr_active, .regset_get = tm_ppr_get, .set = tm_ppr_set
804 },
805 [REGSET_TM_CDSCR] = {
806 .core_note_type = NT_PPC_TM_CDSCR, .n = 1,
807 .size = sizeof(u64), .align = sizeof(u64),
808 .active = tm_dscr_active, .regset_get = tm_dscr_get, .set = tm_dscr_set
809 },
810#endif
811#ifdef CONFIG_PPC64
812 [REGSET_PPR] = {
813 .core_note_type = NT_PPC_PPR, .n = 1,
814 .size = sizeof(u64), .align = sizeof(u64),
815 .regset_get = ppr_get, .set = ppr_set
816 },
817 [REGSET_DSCR] = {
818 .core_note_type = NT_PPC_DSCR, .n = 1,
819 .size = sizeof(u64), .align = sizeof(u64),
820 .regset_get = dscr_get, .set = dscr_set
821 },
822#endif
823#ifdef CONFIG_PPC_BOOK3S_64
824 [REGSET_TAR] = {
825 .core_note_type = NT_PPC_TAR, .n = 1,
826 .size = sizeof(u64), .align = sizeof(u64),
827 .regset_get = tar_get, .set = tar_set
828 },
829 [REGSET_EBB] = {
830 .core_note_type = NT_PPC_EBB, .n = ELF_NEBB,
831 .size = sizeof(u64), .align = sizeof(u64),
832 .active = ebb_active, .regset_get = ebb_get, .set = ebb_set
833 },
834#endif
835};
836
837static const struct user_regset_view user_ppc_compat_view = {
838 .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI,
839 .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets)
840};
841
842const struct user_regset_view *task_user_regset_view(struct task_struct *task)
843{
844 if (IS_ENABLED(CONFIG_PPC64) && test_tsk_thread_flag(task, TIF_32BIT))
845 return &user_ppc_compat_view;
846 return &user_ppc_native_view;
847}
848
