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11#include <linux/sched.h>
12#include <linux/mm.h>
13#include <linux/smp.h>
14#include <linux/kernel.h>
15#include <linux/signal.h>
16#include <linux/errno.h>
17#include <linux/wait.h>
18#include <linux/unistd.h>
19#include <linux/stddef.h>
20#include <linux/elf.h>
21#include <linux/ptrace.h>
22#include <linux/ratelimit.h>
23#include <linux/syscalls.h>
24
25#include <asm/sigcontext.h>
26#include <asm/ucontext.h>
27#include <linux/uaccess.h>
28#include <asm/pgtable.h>
29#include <asm/unistd.h>
30#include <asm/cacheflush.h>
31#include <asm/syscalls.h>
32#include <asm/vdso.h>
33#include <asm/switch_to.h>
34#include <asm/tm.h>
35#include <asm/asm-prototypes.h>
36
37#include "signal.h"
38
39
40#define GP_REGS_SIZE min(sizeof(elf_gregset_t), sizeof(struct pt_regs))
41#define FP_REGS_SIZE sizeof(elf_fpregset_t)
42
43#define TRAMP_TRACEBACK 3
44#define TRAMP_SIZE 6
45
46
47
48
49
50
51
52
53
54struct rt_sigframe {
55
56 struct ucontext uc;
57#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
58 struct ucontext uc_transact;
59#endif
60 unsigned long _unused[2];
61 unsigned int tramp[TRAMP_SIZE];
62 struct siginfo __user *pinfo;
63 void __user *puc;
64 struct siginfo info;
65
66 char abigap[USER_REDZONE_SIZE];
67} __attribute__ ((aligned (16)));
68
69static const char fmt32[] = KERN_INFO \
70 "%s[%d]: bad frame in %s: %08lx nip %08lx lr %08lx\n";
71static const char fmt64[] = KERN_INFO \
72 "%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n";
73
74
75
76
77
78
79
80#ifdef CONFIG_ALTIVEC
81static elf_vrreg_t __user *sigcontext_vmx_regs(struct sigcontext __user *sc)
82{
83 return (elf_vrreg_t __user *) (((unsigned long)sc->vmx_reserve + 15) & ~0xful);
84}
85#endif
86
87
88
89
90
91static long setup_sigcontext(struct sigcontext __user *sc,
92 struct task_struct *tsk, int signr, sigset_t *set,
93 unsigned long handler, int ctx_has_vsx_region)
94{
95
96
97
98
99
100
101
102
103#ifdef CONFIG_ALTIVEC
104 elf_vrreg_t __user *v_regs = sigcontext_vmx_regs(sc);
105 unsigned long vrsave;
106#endif
107 struct pt_regs *regs = tsk->thread.regs;
108 unsigned long msr = regs->msr;
109 long err = 0;
110
111 unsigned long softe = 0x1;
112
113 BUG_ON(tsk != current);
114
115#ifdef CONFIG_ALTIVEC
116 err |= __put_user(v_regs, &sc->v_regs);
117
118
119 if (tsk->thread.used_vr) {
120 flush_altivec_to_thread(tsk);
121
122 err |= __copy_to_user(v_regs, &tsk->thread.vr_state,
123 33 * sizeof(vector128));
124
125
126
127 msr |= MSR_VEC;
128 }
129
130
131
132 vrsave = 0;
133 if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
134 vrsave = mfspr(SPRN_VRSAVE);
135 tsk->thread.vrsave = vrsave;
136 }
137
138 err |= __put_user(vrsave, (u32 __user *)&v_regs[33]);
139#else
140 err |= __put_user(0, &sc->v_regs);
141#endif
142 flush_fp_to_thread(tsk);
143
144 err |= copy_fpr_to_user(&sc->fp_regs, tsk);
145
146
147
148
149
150 msr &= ~MSR_VSX;
151#ifdef CONFIG_VSX
152
153
154
155
156
157 if (tsk->thread.used_vsr && ctx_has_vsx_region) {
158 flush_vsx_to_thread(tsk);
159 v_regs += ELF_NVRREG;
160 err |= copy_vsx_to_user(v_regs, tsk);
161
162
163
164 msr |= MSR_VSX;
165 }
166#endif
167 err |= __put_user(&sc->gp_regs, &sc->regs);
168 WARN_ON(!FULL_REGS(regs));
169 err |= __copy_to_user(&sc->gp_regs, regs, GP_REGS_SIZE);
170 err |= __put_user(msr, &sc->gp_regs[PT_MSR]);
171 err |= __put_user(softe, &sc->gp_regs[PT_SOFTE]);
172 err |= __put_user(signr, &sc->signal);
173 err |= __put_user(handler, &sc->handler);
174 if (set != NULL)
175 err |= __put_user(set->sig[0], &sc->oldmask);
176
177 return err;
178}
179
180#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
181
182
183
184
185
186
187
188
189
190
191
192static long setup_tm_sigcontexts(struct sigcontext __user *sc,
193 struct sigcontext __user *tm_sc,
194 struct task_struct *tsk,
195 int signr, sigset_t *set, unsigned long handler)
196{
197
198
199
200
201
202
203
204
205#ifdef CONFIG_ALTIVEC
206 elf_vrreg_t __user *v_regs = sigcontext_vmx_regs(sc);
207 elf_vrreg_t __user *tm_v_regs = sigcontext_vmx_regs(tm_sc);
208#endif
209 struct pt_regs *regs = tsk->thread.regs;
210 unsigned long msr = tsk->thread.regs->msr;
211 long err = 0;
212
213 BUG_ON(tsk != current);
214
215 BUG_ON(!MSR_TM_ACTIVE(regs->msr));
216
217 WARN_ON(tm_suspend_disabled);
218
219
220
221
222
223 msr |= tsk->thread.ckpt_regs.msr & (MSR_FP | MSR_VEC | MSR_VSX);
224
225
226
227
228
229
230 regs->msr &= ~MSR_TS_MASK;
231
232#ifdef CONFIG_ALTIVEC
233 err |= __put_user(v_regs, &sc->v_regs);
234 err |= __put_user(tm_v_regs, &tm_sc->v_regs);
235
236
237 if (tsk->thread.used_vr) {
238
239 err |= __copy_to_user(v_regs, &tsk->thread.ckvr_state,
240 33 * sizeof(vector128));
241
242
243
244 if (msr & MSR_VEC)
245 err |= __copy_to_user(tm_v_regs,
246 &tsk->thread.vr_state,
247 33 * sizeof(vector128));
248 else
249 err |= __copy_to_user(tm_v_regs,
250 &tsk->thread.ckvr_state,
251 33 * sizeof(vector128));
252
253
254
255
256 msr |= MSR_VEC;
257 }
258
259
260
261 if (cpu_has_feature(CPU_FTR_ALTIVEC))
262 tsk->thread.ckvrsave = mfspr(SPRN_VRSAVE);
263 err |= __put_user(tsk->thread.ckvrsave, (u32 __user *)&v_regs[33]);
264 if (msr & MSR_VEC)
265 err |= __put_user(tsk->thread.vrsave,
266 (u32 __user *)&tm_v_regs[33]);
267 else
268 err |= __put_user(tsk->thread.ckvrsave,
269 (u32 __user *)&tm_v_regs[33]);
270
271#else
272 err |= __put_user(0, &sc->v_regs);
273 err |= __put_user(0, &tm_sc->v_regs);
274#endif
275
276
277 err |= copy_ckfpr_to_user(&sc->fp_regs, tsk);
278 if (msr & MSR_FP)
279 err |= copy_fpr_to_user(&tm_sc->fp_regs, tsk);
280 else
281 err |= copy_ckfpr_to_user(&tm_sc->fp_regs, tsk);
282
283#ifdef CONFIG_VSX
284
285
286
287
288
289 if (tsk->thread.used_vsr) {
290 v_regs += ELF_NVRREG;
291 tm_v_regs += ELF_NVRREG;
292
293 err |= copy_ckvsx_to_user(v_regs, tsk);
294
295 if (msr & MSR_VSX)
296 err |= copy_vsx_to_user(tm_v_regs, tsk);
297 else
298 err |= copy_ckvsx_to_user(tm_v_regs, tsk);
299
300
301
302
303 msr |= MSR_VSX;
304 }
305#endif
306
307 err |= __put_user(&sc->gp_regs, &sc->regs);
308 err |= __put_user(&tm_sc->gp_regs, &tm_sc->regs);
309 WARN_ON(!FULL_REGS(regs));
310 err |= __copy_to_user(&tm_sc->gp_regs, regs, GP_REGS_SIZE);
311 err |= __copy_to_user(&sc->gp_regs,
312 &tsk->thread.ckpt_regs, GP_REGS_SIZE);
313 err |= __put_user(msr, &tm_sc->gp_regs[PT_MSR]);
314 err |= __put_user(msr, &sc->gp_regs[PT_MSR]);
315 err |= __put_user(signr, &sc->signal);
316 err |= __put_user(handler, &sc->handler);
317 if (set != NULL)
318 err |= __put_user(set->sig[0], &sc->oldmask);
319
320 return err;
321}
322#endif
323
324
325
326
327
328static long restore_sigcontext(struct task_struct *tsk, sigset_t *set, int sig,
329 struct sigcontext __user *sc)
330{
331#ifdef CONFIG_ALTIVEC
332 elf_vrreg_t __user *v_regs;
333#endif
334 unsigned long err = 0;
335 unsigned long save_r13 = 0;
336 unsigned long msr;
337 struct pt_regs *regs = tsk->thread.regs;
338#ifdef CONFIG_VSX
339 int i;
340#endif
341
342 BUG_ON(tsk != current);
343
344
345 if (!sig)
346 save_r13 = regs->gpr[13];
347
348
349 err |= __copy_from_user(regs->gpr, sc->gp_regs, sizeof(regs->gpr));
350 err |= __get_user(regs->nip, &sc->gp_regs[PT_NIP]);
351
352 err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
353 if (sig)
354 regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE);
355 err |= __get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3]);
356 err |= __get_user(regs->ctr, &sc->gp_regs[PT_CTR]);
357 err |= __get_user(regs->link, &sc->gp_regs[PT_LNK]);
358 err |= __get_user(regs->xer, &sc->gp_regs[PT_XER]);
359 err |= __get_user(regs->ccr, &sc->gp_regs[PT_CCR]);
360
361 regs->trap = 0;
362 err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]);
363 err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]);
364 err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]);
365
366 if (!sig)
367 regs->gpr[13] = save_r13;
368 if (set != NULL)
369 err |= __get_user(set->sig[0], &sc->oldmask);
370
371
372
373
374
375
376 regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX);
377
378#ifdef CONFIG_ALTIVEC
379 err |= __get_user(v_regs, &sc->v_regs);
380 if (err)
381 return err;
382 if (v_regs && !access_ok(v_regs, 34 * sizeof(vector128)))
383 return -EFAULT;
384
385 if (v_regs != NULL && (msr & MSR_VEC) != 0) {
386 err |= __copy_from_user(&tsk->thread.vr_state, v_regs,
387 33 * sizeof(vector128));
388 tsk->thread.used_vr = true;
389 } else if (tsk->thread.used_vr) {
390 memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
391 }
392
393 if (v_regs != NULL)
394 err |= __get_user(tsk->thread.vrsave, (u32 __user *)&v_regs[33]);
395 else
396 tsk->thread.vrsave = 0;
397 if (cpu_has_feature(CPU_FTR_ALTIVEC))
398 mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
399#endif
400
401 err |= copy_fpr_from_user(tsk, &sc->fp_regs);
402#ifdef CONFIG_VSX
403
404
405
406
407
408 v_regs += ELF_NVRREG;
409 if ((msr & MSR_VSX) != 0) {
410 err |= copy_vsx_from_user(tsk, v_regs);
411 tsk->thread.used_vsr = true;
412 } else {
413 for (i = 0; i < 32 ; i++)
414 tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
415 }
416#endif
417 return err;
418}
419
420#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
421
422
423
424
425static long restore_tm_sigcontexts(struct task_struct *tsk,
426 struct sigcontext __user *sc,
427 struct sigcontext __user *tm_sc)
428{
429#ifdef CONFIG_ALTIVEC
430 elf_vrreg_t __user *v_regs, *tm_v_regs;
431#endif
432 unsigned long err = 0;
433 unsigned long msr;
434 struct pt_regs *regs = tsk->thread.regs;
435#ifdef CONFIG_VSX
436 int i;
437#endif
438
439 BUG_ON(tsk != current);
440
441 if (tm_suspend_disabled)
442 return -EINVAL;
443
444
445 err |= __copy_from_user(regs->gpr, tm_sc->gp_regs, sizeof(regs->gpr));
446 err |= __copy_from_user(&tsk->thread.ckpt_regs, sc->gp_regs,
447 sizeof(regs->gpr));
448
449
450
451
452
453
454
455
456
457 err |= __get_user(regs->nip, &tm_sc->gp_regs[PT_NIP]);
458 err |= __get_user(tsk->thread.tm_tfhar, &sc->gp_regs[PT_NIP]);
459
460
461 err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
462
463 if (MSR_TM_RESV(msr))
464 return -EINVAL;
465
466
467 regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE);
468
469
470 err |= __get_user(regs->ctr, &tm_sc->gp_regs[PT_CTR]);
471 err |= __get_user(regs->link, &tm_sc->gp_regs[PT_LNK]);
472 err |= __get_user(regs->xer, &tm_sc->gp_regs[PT_XER]);
473 err |= __get_user(regs->ccr, &tm_sc->gp_regs[PT_CCR]);
474 err |= __get_user(tsk->thread.ckpt_regs.ctr,
475 &sc->gp_regs[PT_CTR]);
476 err |= __get_user(tsk->thread.ckpt_regs.link,
477 &sc->gp_regs[PT_LNK]);
478 err |= __get_user(tsk->thread.ckpt_regs.xer,
479 &sc->gp_regs[PT_XER]);
480 err |= __get_user(tsk->thread.ckpt_regs.ccr,
481 &sc->gp_regs[PT_CCR]);
482
483
484 err |= __get_user(regs->trap, &sc->gp_regs[PT_TRAP]);
485 err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]);
486 err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]);
487 err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]);
488
489
490
491
492
493
494 regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX);
495
496#ifdef CONFIG_ALTIVEC
497 err |= __get_user(v_regs, &sc->v_regs);
498 err |= __get_user(tm_v_regs, &tm_sc->v_regs);
499 if (err)
500 return err;
501 if (v_regs && !access_ok(v_regs, 34 * sizeof(vector128)))
502 return -EFAULT;
503 if (tm_v_regs && !access_ok(tm_v_regs, 34 * sizeof(vector128)))
504 return -EFAULT;
505
506 if (v_regs != NULL && tm_v_regs != NULL && (msr & MSR_VEC) != 0) {
507 err |= __copy_from_user(&tsk->thread.ckvr_state, v_regs,
508 33 * sizeof(vector128));
509 err |= __copy_from_user(&tsk->thread.vr_state, tm_v_regs,
510 33 * sizeof(vector128));
511 current->thread.used_vr = true;
512 }
513 else if (tsk->thread.used_vr) {
514 memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
515 memset(&tsk->thread.ckvr_state, 0, 33 * sizeof(vector128));
516 }
517
518 if (v_regs != NULL && tm_v_regs != NULL) {
519 err |= __get_user(tsk->thread.ckvrsave,
520 (u32 __user *)&v_regs[33]);
521 err |= __get_user(tsk->thread.vrsave,
522 (u32 __user *)&tm_v_regs[33]);
523 }
524 else {
525 tsk->thread.vrsave = 0;
526 tsk->thread.ckvrsave = 0;
527 }
528 if (cpu_has_feature(CPU_FTR_ALTIVEC))
529 mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
530#endif
531
532 err |= copy_fpr_from_user(tsk, &tm_sc->fp_regs);
533 err |= copy_ckfpr_from_user(tsk, &sc->fp_regs);
534#ifdef CONFIG_VSX
535
536
537
538
539
540 if (v_regs && ((msr & MSR_VSX) != 0)) {
541 v_regs += ELF_NVRREG;
542 tm_v_regs += ELF_NVRREG;
543 err |= copy_vsx_from_user(tsk, tm_v_regs);
544 err |= copy_ckvsx_from_user(tsk, v_regs);
545 tsk->thread.used_vsr = true;
546 } else {
547 for (i = 0; i < 32 ; i++) {
548 tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
549 tsk->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
550 }
551 }
552#endif
553 tm_enable();
554
555 tsk->thread.tm_texasr |= TEXASR_FS;
556
557
558
559
560
561 preempt_disable();
562
563
564 regs->msr |= msr & MSR_TS_MASK;
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582 regs->msr |= MSR_TM;
583
584
585 tm_recheckpoint(&tsk->thread);
586
587 msr_check_and_set(msr & (MSR_FP | MSR_VEC));
588 if (msr & MSR_FP) {
589 load_fp_state(&tsk->thread.fp_state);
590 regs->msr |= (MSR_FP | tsk->thread.fpexc_mode);
591 }
592 if (msr & MSR_VEC) {
593 load_vr_state(&tsk->thread.vr_state);
594 regs->msr |= MSR_VEC;
595 }
596
597 preempt_enable();
598
599 return err;
600}
601#endif
602
603
604
605
606static long setup_trampoline(unsigned int syscall, unsigned int __user *tramp)
607{
608 int i;
609 long err = 0;
610
611
612 err |= __put_user(PPC_INST_ADDI | __PPC_RT(R1) | __PPC_RA(R1) |
613 (__SIGNAL_FRAMESIZE & 0xffff), &tramp[0]);
614
615 err |= __put_user(PPC_INST_ADDI | (syscall & 0xffff), &tramp[1]);
616
617 err |= __put_user(PPC_INST_SC, &tramp[2]);
618
619
620 for (i=TRAMP_TRACEBACK; i < TRAMP_SIZE ;i++)
621 err |= __put_user(0, &tramp[i]);
622
623 if (!err)
624 flush_icache_range((unsigned long) &tramp[0],
625 (unsigned long) &tramp[TRAMP_SIZE]);
626
627 return err;
628}
629
630
631
632
633
634#define UCONTEXTSIZEWITHOUTVSX \
635 (sizeof(struct ucontext) - 32*sizeof(long))
636
637
638
639
640SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
641 struct ucontext __user *, new_ctx, long, ctx_size)
642{
643 unsigned char tmp;
644 sigset_t set;
645 unsigned long new_msr = 0;
646 int ctx_has_vsx_region = 0;
647
648 if (new_ctx &&
649 get_user(new_msr, &new_ctx->uc_mcontext.gp_regs[PT_MSR]))
650 return -EFAULT;
651
652
653
654
655 if (ctx_size < UCONTEXTSIZEWITHOUTVSX)
656 return -EINVAL;
657
658
659
660
661 if ((ctx_size < sizeof(struct ucontext)) &&
662 (new_msr & MSR_VSX))
663 return -EINVAL;
664
665 if (ctx_size >= sizeof(struct ucontext))
666 ctx_has_vsx_region = 1;
667
668 if (old_ctx != NULL) {
669 if (!access_ok(old_ctx, ctx_size)
670 || setup_sigcontext(&old_ctx->uc_mcontext, current, 0, NULL, 0,
671 ctx_has_vsx_region)
672 || __copy_to_user(&old_ctx->uc_sigmask,
673 ¤t->blocked, sizeof(sigset_t)))
674 return -EFAULT;
675 }
676 if (new_ctx == NULL)
677 return 0;
678 if (!access_ok(new_ctx, ctx_size)
679 || __get_user(tmp, (u8 __user *) new_ctx)
680 || __get_user(tmp, (u8 __user *) new_ctx + ctx_size - 1))
681 return -EFAULT;
682
683
684
685
686
687
688
689
690
691
692
693
694
695 if (__copy_from_user(&set, &new_ctx->uc_sigmask, sizeof(set)))
696 do_exit(SIGSEGV);
697 set_current_blocked(&set);
698 if (restore_sigcontext(current, NULL, 0, &new_ctx->uc_mcontext))
699 do_exit(SIGSEGV);
700
701
702 set_thread_flag(TIF_RESTOREALL);
703 return 0;
704}
705
706
707
708
709
710
711SYSCALL_DEFINE0(rt_sigreturn)
712{
713 struct pt_regs *regs = current_pt_regs();
714 struct ucontext __user *uc = (struct ucontext __user *)regs->gpr[1];
715 sigset_t set;
716#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
717 unsigned long msr;
718#endif
719
720
721 current->restart_block.fn = do_no_restart_syscall;
722
723 if (!access_ok(uc, sizeof(*uc)))
724 goto badframe;
725
726 if (__copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
727 goto badframe;
728 set_current_blocked(&set);
729
730#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
731
732
733
734
735
736
737
738
739
740
741 if (MSR_TM_SUSPENDED(mfmsr()))
742 tm_reclaim_current(0);
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767 regs->msr &= ~MSR_TS_MASK;
768
769 if (__get_user(msr, &uc->uc_mcontext.gp_regs[PT_MSR]))
770 goto badframe;
771 if (MSR_TM_ACTIVE(msr)) {
772
773 struct ucontext __user *uc_transact;
774
775
776 if (!cpu_has_feature(CPU_FTR_TM))
777 goto badframe;
778
779 if (__get_user(uc_transact, &uc->uc_link))
780 goto badframe;
781 if (restore_tm_sigcontexts(current, &uc->uc_mcontext,
782 &uc_transact->uc_mcontext))
783 goto badframe;
784 } else
785#endif
786 {
787
788
789
790
791
792
793
794
795
796
797
798
799 current->thread.regs->msr &= ~MSR_TS_MASK;
800 if (restore_sigcontext(current, NULL, 1, &uc->uc_mcontext))
801 goto badframe;
802 }
803
804 if (restore_altstack(&uc->uc_stack))
805 goto badframe;
806
807 set_thread_flag(TIF_RESTOREALL);
808 return 0;
809
810badframe:
811 if (show_unhandled_signals)
812 printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
813 current->comm, current->pid, "rt_sigreturn",
814 (long)uc, regs->nip, regs->link);
815
816 force_sig(SIGSEGV);
817 return 0;
818}
819
820int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
821 struct task_struct *tsk)
822{
823 struct rt_sigframe __user *frame;
824 unsigned long newsp = 0;
825 long err = 0;
826 struct pt_regs *regs = tsk->thread.regs;
827
828 BUG_ON(tsk != current);
829
830 frame = get_sigframe(ksig, get_tm_stackpointer(tsk), sizeof(*frame), 0);
831 if (unlikely(frame == NULL))
832 goto badframe;
833
834 err |= __put_user(&frame->info, &frame->pinfo);
835 err |= __put_user(&frame->uc, &frame->puc);
836 err |= copy_siginfo_to_user(&frame->info, &ksig->info);
837 if (err)
838 goto badframe;
839
840
841 err |= __put_user(0, &frame->uc.uc_flags);
842 err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]);
843#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
844 if (MSR_TM_ACTIVE(regs->msr)) {
845
846
847
848 err |= __put_user(&frame->uc_transact, &frame->uc.uc_link);
849 err |= setup_tm_sigcontexts(&frame->uc.uc_mcontext,
850 &frame->uc_transact.uc_mcontext,
851 tsk, ksig->sig, NULL,
852 (unsigned long)ksig->ka.sa.sa_handler);
853 } else
854#endif
855 {
856 err |= __put_user(0, &frame->uc.uc_link);
857 err |= setup_sigcontext(&frame->uc.uc_mcontext, tsk, ksig->sig,
858 NULL, (unsigned long)ksig->ka.sa.sa_handler,
859 1);
860 }
861 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
862 if (err)
863 goto badframe;
864
865
866 tsk->thread.fp_state.fpscr = 0;
867
868
869 if (vdso64_rt_sigtramp && tsk->mm->context.vdso_base) {
870 regs->link = tsk->mm->context.vdso_base + vdso64_rt_sigtramp;
871 } else {
872 err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
873 if (err)
874 goto badframe;
875 regs->link = (unsigned long) &frame->tramp[0];
876 }
877
878
879 newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE;
880 err |= put_user(regs->gpr[1], (unsigned long __user *)newsp);
881
882
883 if (is_elf2_task()) {
884 regs->nip = (unsigned long) ksig->ka.sa.sa_handler;
885 regs->gpr[12] = regs->nip;
886 } else {
887
888
889
890
891
892 func_descr_t __user *funct_desc_ptr =
893 (func_descr_t __user *) ksig->ka.sa.sa_handler;
894
895 err |= get_user(regs->nip, &funct_desc_ptr->entry);
896 err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
897 }
898
899
900 regs->msr &= ~MSR_LE;
901 regs->msr |= (MSR_KERNEL & MSR_LE);
902 regs->gpr[1] = newsp;
903 regs->gpr[3] = ksig->sig;
904 regs->result = 0;
905 if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
906 err |= get_user(regs->gpr[4], (unsigned long __user *)&frame->pinfo);
907 err |= get_user(regs->gpr[5], (unsigned long __user *)&frame->puc);
908 regs->gpr[6] = (unsigned long) frame;
909 } else {
910 regs->gpr[4] = (unsigned long)&frame->uc.uc_mcontext;
911 }
912 if (err)
913 goto badframe;
914
915 return 0;
916
917badframe:
918 if (show_unhandled_signals)
919 printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
920 tsk->comm, tsk->pid, "setup_rt_frame",
921 (long)frame, regs->nip, regs->link);
922
923 return 1;
924}
925