1
2
3
4
5
6
7
8
9
10
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#include <linux/pagemap.h>
25
26#include <asm/sigcontext.h>
27#include <asm/ucontext.h>
28#include <linux/uaccess.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 4
44#define TRAMP_SIZE 7
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 unsigned long msr)
197{
198
199
200
201
202
203
204
205
206#ifdef CONFIG_ALTIVEC
207 elf_vrreg_t __user *v_regs = sigcontext_vmx_regs(sc);
208 elf_vrreg_t __user *tm_v_regs = sigcontext_vmx_regs(tm_sc);
209#endif
210 struct pt_regs *regs = tsk->thread.regs;
211 long err = 0;
212
213 BUG_ON(tsk != current);
214
215 BUG_ON(!MSR_TM_ACTIVE(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#ifdef CONFIG_ALTIVEC
226 err |= __put_user(v_regs, &sc->v_regs);
227 err |= __put_user(tm_v_regs, &tm_sc->v_regs);
228
229
230 if (tsk->thread.used_vr) {
231
232 err |= __copy_to_user(v_regs, &tsk->thread.ckvr_state,
233 33 * sizeof(vector128));
234
235
236
237 if (msr & MSR_VEC)
238 err |= __copy_to_user(tm_v_regs,
239 &tsk->thread.vr_state,
240 33 * sizeof(vector128));
241 else
242 err |= __copy_to_user(tm_v_regs,
243 &tsk->thread.ckvr_state,
244 33 * sizeof(vector128));
245
246
247
248
249 msr |= MSR_VEC;
250 }
251
252
253
254 if (cpu_has_feature(CPU_FTR_ALTIVEC))
255 tsk->thread.ckvrsave = mfspr(SPRN_VRSAVE);
256 err |= __put_user(tsk->thread.ckvrsave, (u32 __user *)&v_regs[33]);
257 if (msr & MSR_VEC)
258 err |= __put_user(tsk->thread.vrsave,
259 (u32 __user *)&tm_v_regs[33]);
260 else
261 err |= __put_user(tsk->thread.ckvrsave,
262 (u32 __user *)&tm_v_regs[33]);
263
264#else
265 err |= __put_user(0, &sc->v_regs);
266 err |= __put_user(0, &tm_sc->v_regs);
267#endif
268
269
270 err |= copy_ckfpr_to_user(&sc->fp_regs, tsk);
271 if (msr & MSR_FP)
272 err |= copy_fpr_to_user(&tm_sc->fp_regs, tsk);
273 else
274 err |= copy_ckfpr_to_user(&tm_sc->fp_regs, tsk);
275
276#ifdef CONFIG_VSX
277
278
279
280
281
282 if (tsk->thread.used_vsr) {
283 v_regs += ELF_NVRREG;
284 tm_v_regs += ELF_NVRREG;
285
286 err |= copy_ckvsx_to_user(v_regs, tsk);
287
288 if (msr & MSR_VSX)
289 err |= copy_vsx_to_user(tm_v_regs, tsk);
290 else
291 err |= copy_ckvsx_to_user(tm_v_regs, tsk);
292
293
294
295
296 msr |= MSR_VSX;
297 }
298#endif
299
300 err |= __put_user(&sc->gp_regs, &sc->regs);
301 err |= __put_user(&tm_sc->gp_regs, &tm_sc->regs);
302 WARN_ON(!FULL_REGS(regs));
303 err |= __copy_to_user(&tm_sc->gp_regs, regs, GP_REGS_SIZE);
304 err |= __copy_to_user(&sc->gp_regs,
305 &tsk->thread.ckpt_regs, GP_REGS_SIZE);
306 err |= __put_user(msr, &tm_sc->gp_regs[PT_MSR]);
307 err |= __put_user(msr, &sc->gp_regs[PT_MSR]);
308 err |= __put_user(signr, &sc->signal);
309 err |= __put_user(handler, &sc->handler);
310 if (set != NULL)
311 err |= __put_user(set->sig[0], &sc->oldmask);
312
313 return err;
314}
315#endif
316
317
318
319
320
321static long restore_sigcontext(struct task_struct *tsk, sigset_t *set, int sig,
322 struct sigcontext __user *sc)
323{
324#ifdef CONFIG_ALTIVEC
325 elf_vrreg_t __user *v_regs;
326#endif
327 unsigned long err = 0;
328 unsigned long save_r13 = 0;
329 unsigned long msr;
330 struct pt_regs *regs = tsk->thread.regs;
331#ifdef CONFIG_VSX
332 int i;
333#endif
334
335 BUG_ON(tsk != current);
336
337
338 if (!sig)
339 save_r13 = regs->gpr[13];
340
341
342 err |= __copy_from_user(regs->gpr, sc->gp_regs, sizeof(regs->gpr));
343 err |= __get_user(regs->nip, &sc->gp_regs[PT_NIP]);
344
345 err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
346 if (sig)
347 regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE);
348 err |= __get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3]);
349 err |= __get_user(regs->ctr, &sc->gp_regs[PT_CTR]);
350 err |= __get_user(regs->link, &sc->gp_regs[PT_LNK]);
351 err |= __get_user(regs->xer, &sc->gp_regs[PT_XER]);
352 err |= __get_user(regs->ccr, &sc->gp_regs[PT_CCR]);
353
354 set_trap_norestart(regs);
355 err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]);
356 err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]);
357 err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]);
358
359 if (!sig)
360 regs->gpr[13] = save_r13;
361 if (set != NULL)
362 err |= __get_user(set->sig[0], &sc->oldmask);
363
364
365
366
367
368
369 regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX);
370
371#ifdef CONFIG_ALTIVEC
372 err |= __get_user(v_regs, &sc->v_regs);
373 if (err)
374 return err;
375 if (v_regs && !access_ok(v_regs, 34 * sizeof(vector128)))
376 return -EFAULT;
377
378 if (v_regs != NULL && (msr & MSR_VEC) != 0) {
379 err |= __copy_from_user(&tsk->thread.vr_state, v_regs,
380 33 * sizeof(vector128));
381 tsk->thread.used_vr = true;
382 } else if (tsk->thread.used_vr) {
383 memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
384 }
385
386 if (v_regs != NULL)
387 err |= __get_user(tsk->thread.vrsave, (u32 __user *)&v_regs[33]);
388 else
389 tsk->thread.vrsave = 0;
390 if (cpu_has_feature(CPU_FTR_ALTIVEC))
391 mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
392#endif
393
394 err |= copy_fpr_from_user(tsk, &sc->fp_regs);
395#ifdef CONFIG_VSX
396
397
398
399
400
401 v_regs += ELF_NVRREG;
402 if ((msr & MSR_VSX) != 0) {
403 err |= copy_vsx_from_user(tsk, v_regs);
404 tsk->thread.used_vsr = true;
405 } else {
406 for (i = 0; i < 32 ; i++)
407 tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
408 }
409#endif
410 return err;
411}
412
413#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
414
415
416
417
418static long restore_tm_sigcontexts(struct task_struct *tsk,
419 struct sigcontext __user *sc,
420 struct sigcontext __user *tm_sc)
421{
422#ifdef CONFIG_ALTIVEC
423 elf_vrreg_t __user *v_regs, *tm_v_regs;
424#endif
425 unsigned long err = 0;
426 unsigned long msr;
427 struct pt_regs *regs = tsk->thread.regs;
428#ifdef CONFIG_VSX
429 int i;
430#endif
431
432 BUG_ON(tsk != current);
433
434 if (tm_suspend_disabled)
435 return -EINVAL;
436
437
438 err |= __copy_from_user(regs->gpr, tm_sc->gp_regs, sizeof(regs->gpr));
439 err |= __copy_from_user(&tsk->thread.ckpt_regs, sc->gp_regs,
440 sizeof(regs->gpr));
441
442
443
444
445
446
447
448
449
450 err |= __get_user(regs->nip, &tm_sc->gp_regs[PT_NIP]);
451 err |= __get_user(tsk->thread.tm_tfhar, &sc->gp_regs[PT_NIP]);
452
453
454 err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
455
456 if (MSR_TM_RESV(msr))
457 return -EINVAL;
458
459
460 regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE);
461
462
463 err |= __get_user(regs->ctr, &tm_sc->gp_regs[PT_CTR]);
464 err |= __get_user(regs->link, &tm_sc->gp_regs[PT_LNK]);
465 err |= __get_user(regs->xer, &tm_sc->gp_regs[PT_XER]);
466 err |= __get_user(regs->ccr, &tm_sc->gp_regs[PT_CCR]);
467 err |= __get_user(tsk->thread.ckpt_regs.ctr,
468 &sc->gp_regs[PT_CTR]);
469 err |= __get_user(tsk->thread.ckpt_regs.link,
470 &sc->gp_regs[PT_LNK]);
471 err |= __get_user(tsk->thread.ckpt_regs.xer,
472 &sc->gp_regs[PT_XER]);
473 err |= __get_user(tsk->thread.ckpt_regs.ccr,
474 &sc->gp_regs[PT_CCR]);
475
476 set_trap_norestart(regs);
477
478 err |= __get_user(regs->dar, &sc->gp_regs[PT_DAR]);
479 err |= __get_user(regs->dsisr, &sc->gp_regs[PT_DSISR]);
480 err |= __get_user(regs->result, &sc->gp_regs[PT_RESULT]);
481
482
483
484
485
486
487 regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX);
488
489#ifdef CONFIG_ALTIVEC
490 err |= __get_user(v_regs, &sc->v_regs);
491 err |= __get_user(tm_v_regs, &tm_sc->v_regs);
492 if (err)
493 return err;
494 if (v_regs && !access_ok(v_regs, 34 * sizeof(vector128)))
495 return -EFAULT;
496 if (tm_v_regs && !access_ok(tm_v_regs, 34 * sizeof(vector128)))
497 return -EFAULT;
498
499 if (v_regs != NULL && tm_v_regs != NULL && (msr & MSR_VEC) != 0) {
500 err |= __copy_from_user(&tsk->thread.ckvr_state, v_regs,
501 33 * sizeof(vector128));
502 err |= __copy_from_user(&tsk->thread.vr_state, tm_v_regs,
503 33 * sizeof(vector128));
504 current->thread.used_vr = true;
505 }
506 else if (tsk->thread.used_vr) {
507 memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
508 memset(&tsk->thread.ckvr_state, 0, 33 * sizeof(vector128));
509 }
510
511 if (v_regs != NULL && tm_v_regs != NULL) {
512 err |= __get_user(tsk->thread.ckvrsave,
513 (u32 __user *)&v_regs[33]);
514 err |= __get_user(tsk->thread.vrsave,
515 (u32 __user *)&tm_v_regs[33]);
516 }
517 else {
518 tsk->thread.vrsave = 0;
519 tsk->thread.ckvrsave = 0;
520 }
521 if (cpu_has_feature(CPU_FTR_ALTIVEC))
522 mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
523#endif
524
525 err |= copy_fpr_from_user(tsk, &tm_sc->fp_regs);
526 err |= copy_ckfpr_from_user(tsk, &sc->fp_regs);
527#ifdef CONFIG_VSX
528
529
530
531
532
533 if (v_regs && ((msr & MSR_VSX) != 0)) {
534 v_regs += ELF_NVRREG;
535 tm_v_regs += ELF_NVRREG;
536 err |= copy_vsx_from_user(tsk, tm_v_regs);
537 err |= copy_ckvsx_from_user(tsk, v_regs);
538 tsk->thread.used_vsr = true;
539 } else {
540 for (i = 0; i < 32 ; i++) {
541 tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
542 tsk->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
543 }
544 }
545#endif
546 tm_enable();
547
548 tsk->thread.tm_texasr |= TEXASR_FS;
549
550
551
552
553
554 preempt_disable();
555
556
557 regs->msr |= msr & MSR_TS_MASK;
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575 regs->msr |= MSR_TM;
576
577
578 tm_recheckpoint(&tsk->thread);
579
580 msr_check_and_set(msr & (MSR_FP | MSR_VEC));
581 if (msr & MSR_FP) {
582 load_fp_state(&tsk->thread.fp_state);
583 regs->msr |= (MSR_FP | tsk->thread.fpexc_mode);
584 }
585 if (msr & MSR_VEC) {
586 load_vr_state(&tsk->thread.vr_state);
587 regs->msr |= MSR_VEC;
588 }
589
590 preempt_enable();
591
592 return err;
593}
594#endif
595
596
597
598
599static long setup_trampoline(unsigned int syscall, unsigned int __user *tramp)
600{
601 int i;
602 long err = 0;
603
604
605 err |= __put_user(PPC_INST_BCTRL, &tramp[0]);
606
607 err |= __put_user(PPC_INST_ADDI | __PPC_RT(R1) | __PPC_RA(R1) |
608 (__SIGNAL_FRAMESIZE & 0xffff), &tramp[1]);
609
610 err |= __put_user(PPC_INST_ADDI | (syscall & 0xffff), &tramp[2]);
611
612 err |= __put_user(PPC_INST_SC, &tramp[3]);
613
614
615 for (i=TRAMP_TRACEBACK; i < TRAMP_SIZE ;i++)
616 err |= __put_user(0, &tramp[i]);
617
618 if (!err)
619 flush_icache_range((unsigned long) &tramp[0],
620 (unsigned long) &tramp[TRAMP_SIZE]);
621
622 return err;
623}
624
625
626
627
628
629#define UCONTEXTSIZEWITHOUTVSX \
630 (sizeof(struct ucontext) - 32*sizeof(long))
631
632
633
634
635SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx,
636 struct ucontext __user *, new_ctx, long, ctx_size)
637{
638 sigset_t set;
639 unsigned long new_msr = 0;
640 int ctx_has_vsx_region = 0;
641
642 if (new_ctx &&
643 get_user(new_msr, &new_ctx->uc_mcontext.gp_regs[PT_MSR]))
644 return -EFAULT;
645
646
647
648
649 if (ctx_size < UCONTEXTSIZEWITHOUTVSX)
650 return -EINVAL;
651
652
653
654
655 if ((ctx_size < sizeof(struct ucontext)) &&
656 (new_msr & MSR_VSX))
657 return -EINVAL;
658
659 if (ctx_size >= sizeof(struct ucontext))
660 ctx_has_vsx_region = 1;
661
662 if (old_ctx != NULL) {
663 if (!access_ok(old_ctx, ctx_size)
664 || setup_sigcontext(&old_ctx->uc_mcontext, current, 0, NULL, 0,
665 ctx_has_vsx_region)
666 || __copy_to_user(&old_ctx->uc_sigmask,
667 ¤t->blocked, sizeof(sigset_t)))
668 return -EFAULT;
669 }
670 if (new_ctx == NULL)
671 return 0;
672 if (!access_ok(new_ctx, ctx_size) ||
673 fault_in_pages_readable((u8 __user *)new_ctx, ctx_size))
674 return -EFAULT;
675
676
677
678
679
680
681
682
683
684
685
686
687
688 if (__copy_from_user(&set, &new_ctx->uc_sigmask, sizeof(set)))
689 do_exit(SIGSEGV);
690 set_current_blocked(&set);
691 if (restore_sigcontext(current, NULL, 0, &new_ctx->uc_mcontext))
692 do_exit(SIGSEGV);
693
694
695 set_thread_flag(TIF_RESTOREALL);
696 return 0;
697}
698
699
700
701
702
703
704SYSCALL_DEFINE0(rt_sigreturn)
705{
706 struct pt_regs *regs = current_pt_regs();
707 struct ucontext __user *uc = (struct ucontext __user *)regs->gpr[1];
708 sigset_t set;
709#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
710 unsigned long msr;
711#endif
712
713
714 current->restart_block.fn = do_no_restart_syscall;
715
716 if (!access_ok(uc, sizeof(*uc)))
717 goto badframe;
718
719 if (__copy_from_user(&set, &uc->uc_sigmask, sizeof(set)))
720 goto badframe;
721 set_current_blocked(&set);
722
723#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
724
725
726
727
728
729
730
731
732
733
734 if (MSR_TM_SUSPENDED(mfmsr()))
735 tm_reclaim_current(0);
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760 regs->msr &= ~MSR_TS_MASK;
761
762 if (__get_user(msr, &uc->uc_mcontext.gp_regs[PT_MSR]))
763 goto badframe;
764 if (MSR_TM_ACTIVE(msr)) {
765
766 struct ucontext __user *uc_transact;
767
768
769 if (!cpu_has_feature(CPU_FTR_TM))
770 goto badframe;
771
772 if (__get_user(uc_transact, &uc->uc_link))
773 goto badframe;
774 if (restore_tm_sigcontexts(current, &uc->uc_mcontext,
775 &uc_transact->uc_mcontext))
776 goto badframe;
777 } else
778#endif
779 {
780
781
782
783
784
785
786
787
788
789
790
791
792 current->thread.regs->msr &= ~MSR_TS_MASK;
793 if (restore_sigcontext(current, NULL, 1, &uc->uc_mcontext))
794 goto badframe;
795 }
796
797 if (restore_altstack(&uc->uc_stack))
798 goto badframe;
799
800 set_thread_flag(TIF_RESTOREALL);
801 return 0;
802
803badframe:
804 if (show_unhandled_signals)
805 printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
806 current->comm, current->pid, "rt_sigreturn",
807 (long)uc, regs->nip, regs->link);
808
809 force_sig(SIGSEGV);
810 return 0;
811}
812
813int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
814 struct task_struct *tsk)
815{
816 struct rt_sigframe __user *frame;
817 unsigned long newsp = 0;
818 long err = 0;
819 struct pt_regs *regs = tsk->thread.regs;
820#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
821
822 unsigned long msr = regs->msr;
823#endif
824
825 BUG_ON(tsk != current);
826
827 frame = get_sigframe(ksig, get_tm_stackpointer(tsk), sizeof(*frame), 0);
828 if (unlikely(frame == NULL))
829 goto badframe;
830
831 err |= __put_user(&frame->info, &frame->pinfo);
832 err |= __put_user(&frame->uc, &frame->puc);
833 err |= copy_siginfo_to_user(&frame->info, &ksig->info);
834 if (err)
835 goto badframe;
836
837
838 err |= __put_user(0, &frame->uc.uc_flags);
839 err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]);
840#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
841 if (MSR_TM_ACTIVE(msr)) {
842
843
844
845 err |= __put_user(&frame->uc_transact, &frame->uc.uc_link);
846 err |= setup_tm_sigcontexts(&frame->uc.uc_mcontext,
847 &frame->uc_transact.uc_mcontext,
848 tsk, ksig->sig, NULL,
849 (unsigned long)ksig->ka.sa.sa_handler,
850 msr);
851 } else
852#endif
853 {
854 err |= __put_user(0, &frame->uc.uc_link);
855 err |= setup_sigcontext(&frame->uc.uc_mcontext, tsk, ksig->sig,
856 NULL, (unsigned long)ksig->ka.sa.sa_handler,
857 1);
858 }
859 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
860 if (err)
861 goto badframe;
862
863
864 tsk->thread.fp_state.fpscr = 0;
865
866
867 if (vdso64_rt_sigtramp && tsk->mm->context.vdso_base) {
868 regs->nip = tsk->mm->context.vdso_base + vdso64_rt_sigtramp;
869 } else {
870 err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
871 if (err)
872 goto badframe;
873 regs->nip = (unsigned long) &frame->tramp[0];
874 }
875
876
877 newsp = ((unsigned long)frame) - __SIGNAL_FRAMESIZE;
878 err |= put_user(regs->gpr[1], (unsigned long __user *)newsp);
879
880
881 if (is_elf2_task()) {
882 regs->ctr = (unsigned long) ksig->ka.sa.sa_handler;
883 regs->gpr[12] = regs->ctr;
884 } else {
885
886
887
888
889
890 func_descr_t __user *funct_desc_ptr =
891 (func_descr_t __user *) ksig->ka.sa.sa_handler;
892
893 err |= get_user(regs->ctr, &funct_desc_ptr->entry);
894 err |= get_user(regs->gpr[2], &funct_desc_ptr->toc);
895 }
896
897
898 regs->msr &= ~MSR_LE;
899 regs->msr |= (MSR_KERNEL & MSR_LE);
900 regs->gpr[1] = newsp;
901 regs->gpr[3] = ksig->sig;
902 regs->result = 0;
903 if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
904 err |= get_user(regs->gpr[4], (unsigned long __user *)&frame->pinfo);
905 err |= get_user(regs->gpr[5], (unsigned long __user *)&frame->puc);
906 regs->gpr[6] = (unsigned long) frame;
907 } else {
908 regs->gpr[4] = (unsigned long)&frame->uc.uc_mcontext;
909 }
910 if (err)
911 goto badframe;
912
913 return 0;
914
915badframe:
916 if (show_unhandled_signals)
917 printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
918 tsk->comm, tsk->pid, "setup_rt_frame",
919 (long)frame, regs->nip, regs->link);
920
921 return 1;
922}
923