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19#include "qemu/osdep.h"
20#include "qemu.h"
21#include "signal-common.h"
22#include "linux-user/trace.h"
23
24
25
26#if defined(TARGET_PPC64)
27#define SIGNAL_FRAMESIZE 128
28#else
29#define SIGNAL_FRAMESIZE 64
30#endif
31
32
33
34struct target_mcontext {
35 target_ulong mc_gregs[48];
36
37 uint64_t mc_fregs[33];
38#if defined(TARGET_PPC64)
39
40 target_ulong v_regs;
41#else
42 target_ulong mc_pad[2];
43#endif
44
45
46
47
48 union {
49
50 uint32_t spe[33];
51
52
53
54
55
56#if defined(TARGET_PPC64)
57#define QEMU_NVRREG (34 + 16)
58
59
60
61
62
63
64 target_ulong pad;
65#else
66
67#define QEMU_NVRREG 33
68#endif
69
70
71
72
73
74 uint64_t altivec[QEMU_NVRREG][2];
75#undef QEMU_NVRREG
76 } mc_vregs;
77};
78
79
80struct target_sigcontext {
81 target_ulong _unused[4];
82 int32_t signal;
83#if defined(TARGET_PPC64)
84 int32_t pad0;
85#endif
86 target_ulong handler;
87 target_ulong oldmask;
88 target_ulong regs;
89#if defined(TARGET_PPC64)
90 struct target_mcontext mcontext;
91#endif
92};
93
94
95
96enum {
97 TARGET_PT_R0 = 0,
98 TARGET_PT_R1 = 1,
99 TARGET_PT_R2 = 2,
100 TARGET_PT_R3 = 3,
101 TARGET_PT_R4 = 4,
102 TARGET_PT_R5 = 5,
103 TARGET_PT_R6 = 6,
104 TARGET_PT_R7 = 7,
105 TARGET_PT_R8 = 8,
106 TARGET_PT_R9 = 9,
107 TARGET_PT_R10 = 10,
108 TARGET_PT_R11 = 11,
109 TARGET_PT_R12 = 12,
110 TARGET_PT_R13 = 13,
111 TARGET_PT_R14 = 14,
112 TARGET_PT_R15 = 15,
113 TARGET_PT_R16 = 16,
114 TARGET_PT_R17 = 17,
115 TARGET_PT_R18 = 18,
116 TARGET_PT_R19 = 19,
117 TARGET_PT_R20 = 20,
118 TARGET_PT_R21 = 21,
119 TARGET_PT_R22 = 22,
120 TARGET_PT_R23 = 23,
121 TARGET_PT_R24 = 24,
122 TARGET_PT_R25 = 25,
123 TARGET_PT_R26 = 26,
124 TARGET_PT_R27 = 27,
125 TARGET_PT_R28 = 28,
126 TARGET_PT_R29 = 29,
127 TARGET_PT_R30 = 30,
128 TARGET_PT_R31 = 31,
129 TARGET_PT_NIP = 32,
130 TARGET_PT_MSR = 33,
131 TARGET_PT_ORIG_R3 = 34,
132 TARGET_PT_CTR = 35,
133 TARGET_PT_LNK = 36,
134 TARGET_PT_XER = 37,
135 TARGET_PT_CCR = 38,
136
137 TARGET_PT_MQ = 39,
138 TARGET_PT_SOFTE = 39,
139 TARGET_PT_TRAP = 40,
140 TARGET_PT_DAR = 41,
141 TARGET_PT_DSISR = 42,
142 TARGET_PT_RESULT = 43,
143 TARGET_PT_REGS_COUNT = 44
144};
145
146
147struct target_ucontext {
148 target_ulong tuc_flags;
149 target_ulong tuc_link;
150 struct target_sigaltstack tuc_stack;
151#if !defined(TARGET_PPC64)
152 int32_t tuc_pad[7];
153 target_ulong tuc_regs;
154
155#endif
156 target_sigset_t tuc_sigmask;
157#if defined(TARGET_PPC64)
158 target_sigset_t unused[15];
159 struct target_sigcontext tuc_sigcontext;
160#else
161 int32_t tuc_maskext[30];
162 int32_t tuc_pad2[3];
163 struct target_mcontext tuc_mcontext;
164#endif
165};
166
167
168struct target_sigframe {
169 struct target_sigcontext sctx;
170 struct target_mcontext mctx;
171 int32_t abigap[56];
172};
173
174#if defined(TARGET_PPC64)
175
176#define TARGET_TRAMP_SIZE 6
177
178struct target_rt_sigframe {
179
180 struct target_ucontext uc;
181 target_ulong _unused[2];
182 uint32_t trampoline[TARGET_TRAMP_SIZE];
183 target_ulong pinfo;
184 target_ulong puc;
185 struct target_siginfo info;
186
187 char abigap[288];
188} __attribute__((aligned(16)));
189
190#else
191
192struct target_rt_sigframe {
193 struct target_siginfo info;
194 struct target_ucontext uc;
195 int32_t abigap[56];
196};
197
198#endif
199
200#if defined(TARGET_PPC64)
201
202struct target_func_ptr {
203 target_ulong entry;
204 target_ulong toc;
205};
206
207#endif
208
209
210#define tramp mc_pad
211
212
213static target_ulong get_sigframe(struct target_sigaction *ka,
214 CPUPPCState *env,
215 int frame_size)
216{
217 target_ulong oldsp;
218
219 oldsp = target_sigsp(get_sp_from_cpustate(env), ka);
220
221 return (oldsp - frame_size) & ~0xFUL;
222}
223
224#if ((defined(TARGET_WORDS_BIGENDIAN) && defined(HOST_WORDS_BIGENDIAN)) || \
225 (!defined(HOST_WORDS_BIGENDIAN) && !defined(TARGET_WORDS_BIGENDIAN)))
226#define PPC_VEC_HI 0
227#define PPC_VEC_LO 1
228#else
229#define PPC_VEC_HI 1
230#define PPC_VEC_LO 0
231#endif
232
233
234static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame)
235{
236 target_ulong msr = env->msr;
237 int i;
238 target_ulong ccr = 0;
239
240
241
242
243
244
245 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
246 __put_user(env->gpr[i], &frame->mc_gregs[i]);
247 }
248 __put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
249 __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
250 __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
251 __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
252
253 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
254 ccr |= env->crf[i] << (32 - ((i + 1) * 4));
255 }
256 __put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
257
258
259 if (env->insns_flags & PPC_ALTIVEC) {
260 uint32_t *vrsave;
261 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
262 ppc_avr_t *avr = &env->avr[i];
263 ppc_avr_t *vreg = (ppc_avr_t *)&frame->mc_vregs.altivec[i];
264
265 __put_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
266 __put_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
267 }
268
269
270 msr |= MSR_VR;
271#if defined(TARGET_PPC64)
272 vrsave = (uint32_t *)&frame->mc_vregs.altivec[33];
273
274 __put_user(h2g(frame->mc_vregs.altivec), &frame->v_regs);
275#else
276 vrsave = (uint32_t *)&frame->mc_vregs.altivec[32];
277#endif
278 __put_user((uint32_t)env->spr[SPR_VRSAVE], vrsave);
279 }
280
281
282 if (env->insns_flags2 & PPC2_VSX) {
283 uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
284 for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
285 __put_user(env->vsr[i], &vsregs[i]);
286 }
287 }
288
289
290 if (env->insns_flags & PPC_FLOAT) {
291 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
292 __put_user(env->fpr[i], &frame->mc_fregs[i]);
293 }
294 __put_user((uint64_t) env->fpscr, &frame->mc_fregs[32]);
295 }
296
297
298 if (env->insns_flags & PPC_SPE) {
299#if defined(TARGET_PPC64)
300 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
301 __put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i]);
302 }
303#else
304 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
305 __put_user(env->gprh[i], &frame->mc_vregs.spe[i]);
306 }
307#endif
308
309
310 msr |= MSR_SPE;
311 __put_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
312 }
313
314
315 __put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
316}
317
318static void encode_trampoline(int sigret, uint32_t *tramp)
319{
320
321 if (sigret) {
322 __put_user(0x38000000 | sigret, &tramp[0]);
323 __put_user(0x44000002, &tramp[1]);
324 }
325}
326
327static void restore_user_regs(CPUPPCState *env,
328 struct target_mcontext *frame, int sig)
329{
330 target_ulong save_r2 = 0;
331 target_ulong msr;
332 target_ulong ccr;
333
334 int i;
335
336 if (!sig) {
337 save_r2 = env->gpr[2];
338 }
339
340
341 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
342 __get_user(env->gpr[i], &frame->mc_gregs[i]);
343 }
344 __get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]);
345 __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]);
346 __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
347 __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
348 __get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
349
350 for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
351 env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
352 }
353
354 if (!sig) {
355 env->gpr[2] = save_r2;
356 }
357
358 __get_user(msr, &frame->mc_gregs[TARGET_PT_MSR]);
359
360
361 if (sig)
362 env->msr = (env->msr & ~(1ull << MSR_LE)) | (msr & (1ull << MSR_LE));
363
364
365 if (env->insns_flags & PPC_ALTIVEC) {
366 ppc_avr_t *v_regs;
367 uint32_t *vrsave;
368#if defined(TARGET_PPC64)
369 uint64_t v_addr;
370
371 __get_user(v_addr, &frame->v_regs);
372 v_regs = g2h(v_addr);
373#else
374 v_regs = (ppc_avr_t *)frame->mc_vregs.altivec;
375#endif
376 for (i = 0; i < ARRAY_SIZE(env->avr); i++) {
377 ppc_avr_t *avr = &env->avr[i];
378 ppc_avr_t *vreg = &v_regs[i];
379
380 __get_user(avr->u64[PPC_VEC_HI], &vreg->u64[0]);
381 __get_user(avr->u64[PPC_VEC_LO], &vreg->u64[1]);
382 }
383
384
385#if defined(TARGET_PPC64)
386 vrsave = (uint32_t *)&v_regs[33];
387#else
388 vrsave = (uint32_t *)&v_regs[32];
389#endif
390 __get_user(env->spr[SPR_VRSAVE], vrsave);
391 }
392
393
394 if (env->insns_flags2 & PPC2_VSX) {
395 uint64_t *vsregs = (uint64_t *)&frame->mc_vregs.altivec[34];
396 for (i = 0; i < ARRAY_SIZE(env->vsr); i++) {
397 __get_user(env->vsr[i], &vsregs[i]);
398 }
399 }
400
401
402 if (env->insns_flags & PPC_FLOAT) {
403 uint64_t fpscr;
404 for (i = 0; i < ARRAY_SIZE(env->fpr); i++) {
405 __get_user(env->fpr[i], &frame->mc_fregs[i]);
406 }
407 __get_user(fpscr, &frame->mc_fregs[32]);
408 env->fpscr = (uint32_t) fpscr;
409 }
410
411
412 if (env->insns_flags & PPC_SPE) {
413#if defined(TARGET_PPC64)
414 for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
415 uint32_t hi;
416
417 __get_user(hi, &frame->mc_vregs.spe[i]);
418 env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]);
419 }
420#else
421 for (i = 0; i < ARRAY_SIZE(env->gprh); i++) {
422 __get_user(env->gprh[i], &frame->mc_vregs.spe[i]);
423 }
424#endif
425 __get_user(env->spe_fscr, &frame->mc_vregs.spe[32]);
426 }
427}
428
429#if !defined(TARGET_PPC64)
430void setup_frame(int sig, struct target_sigaction *ka,
431 target_sigset_t *set, CPUPPCState *env)
432{
433 struct target_sigframe *frame;
434 struct target_sigcontext *sc;
435 target_ulong frame_addr, newsp;
436 int err = 0;
437
438 frame_addr = get_sigframe(ka, env, sizeof(*frame));
439 trace_user_setup_frame(env, frame_addr);
440 if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1))
441 goto sigsegv;
442 sc = &frame->sctx;
443
444 __put_user(ka->_sa_handler, &sc->handler);
445 __put_user(set->sig[0], &sc->oldmask);
446 __put_user(set->sig[1], &sc->_unused[3]);
447 __put_user(h2g(&frame->mctx), &sc->regs);
448 __put_user(sig, &sc->signal);
449
450
451 save_user_regs(env, &frame->mctx);
452
453
454 encode_trampoline(TARGET_NR_sigreturn, (uint32_t *)&frame->mctx.tramp);
455
456
457
458 env->lr = (target_ulong) h2g(frame->mctx.tramp);
459
460
461 env->fpscr = 0;
462
463
464 newsp = frame_addr - SIGNAL_FRAMESIZE;
465 err |= put_user(env->gpr[1], newsp, target_ulong);
466
467 if (err)
468 goto sigsegv;
469
470
471 env->gpr[1] = newsp;
472 env->gpr[3] = sig;
473 env->gpr[4] = frame_addr + offsetof(struct target_sigframe, sctx);
474
475 env->nip = (target_ulong) ka->_sa_handler;
476
477
478 env->msr &= ~(1ull << MSR_LE);
479
480 unlock_user_struct(frame, frame_addr, 1);
481 return;
482
483sigsegv:
484 unlock_user_struct(frame, frame_addr, 1);
485 force_sigsegv(sig);
486}
487#endif
488
489void setup_rt_frame(int sig, struct target_sigaction *ka,
490 target_siginfo_t *info,
491 target_sigset_t *set, CPUPPCState *env)
492{
493 struct target_rt_sigframe *rt_sf;
494 uint32_t *trampptr = 0;
495 struct target_mcontext *mctx = 0;
496 target_ulong rt_sf_addr, newsp = 0;
497 int i, err = 0;
498#if defined(TARGET_PPC64)
499 struct target_sigcontext *sc = 0;
500 struct image_info *image = ((TaskState *)thread_cpu->opaque)->info;
501#endif
502
503 rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf));
504 if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1))
505 goto sigsegv;
506
507 tswap_siginfo(&rt_sf->info, info);
508
509 __put_user(0, &rt_sf->uc.tuc_flags);
510 __put_user(0, &rt_sf->uc.tuc_link);
511 target_save_altstack(&rt_sf->uc.tuc_stack, env);
512#if !defined(TARGET_PPC64)
513 __put_user(h2g (&rt_sf->uc.tuc_mcontext),
514 &rt_sf->uc.tuc_regs);
515#endif
516 for(i = 0; i < TARGET_NSIG_WORDS; i++) {
517 __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]);
518 }
519
520#if defined(TARGET_PPC64)
521 mctx = &rt_sf->uc.tuc_sigcontext.mcontext;
522 trampptr = &rt_sf->trampoline[0];
523
524 sc = &rt_sf->uc.tuc_sigcontext;
525 __put_user(h2g(mctx), &sc->regs);
526 __put_user(sig, &sc->signal);
527#else
528 mctx = &rt_sf->uc.tuc_mcontext;
529 trampptr = (uint32_t *)&rt_sf->uc.tuc_mcontext.tramp;
530#endif
531
532 save_user_regs(env, mctx);
533 encode_trampoline(TARGET_NR_rt_sigreturn, trampptr);
534
535
536
537 env->lr = (target_ulong) h2g(trampptr);
538
539
540 env->fpscr = 0;
541
542
543 newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16);
544 err |= put_user(env->gpr[1], newsp, target_ulong);
545
546 if (err)
547 goto sigsegv;
548
549
550 env->gpr[1] = newsp;
551 env->gpr[3] = (target_ulong) sig;
552 env->gpr[4] = (target_ulong) h2g(&rt_sf->info);
553 env->gpr[5] = (target_ulong) h2g(&rt_sf->uc);
554 env->gpr[6] = (target_ulong) h2g(rt_sf);
555
556#if defined(TARGET_PPC64)
557 if (get_ppc64_abi(image) < 2) {
558
559 struct target_func_ptr *handler =
560 (struct target_func_ptr *)g2h(ka->_sa_handler);
561 env->nip = tswapl(handler->entry);
562 env->gpr[2] = tswapl(handler->toc);
563 } else {
564
565
566 env->nip = tswapl((target_ulong) ka->_sa_handler);
567 env->gpr[12] = env->nip;
568 }
569#else
570 env->nip = (target_ulong) ka->_sa_handler;
571#endif
572
573
574 env->msr &= ~(1ull << MSR_LE);
575
576 unlock_user_struct(rt_sf, rt_sf_addr, 1);
577 return;
578
579sigsegv:
580 unlock_user_struct(rt_sf, rt_sf_addr, 1);
581 force_sigsegv(sig);
582
583}
584
585#if !defined(TARGET_PPC64)
586long do_sigreturn(CPUPPCState *env)
587{
588 struct target_sigcontext *sc = NULL;
589 struct target_mcontext *sr = NULL;
590 target_ulong sr_addr = 0, sc_addr;
591 sigset_t blocked;
592 target_sigset_t set;
593
594 sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE;
595 if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1))
596 goto sigsegv;
597
598#if defined(TARGET_PPC64)
599 set.sig[0] = sc->oldmask + ((uint64_t)(sc->_unused[3]) << 32);
600#else
601 __get_user(set.sig[0], &sc->oldmask);
602 __get_user(set.sig[1], &sc->_unused[3]);
603#endif
604 target_to_host_sigset_internal(&blocked, &set);
605 set_sigmask(&blocked);
606
607 __get_user(sr_addr, &sc->regs);
608 if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1))
609 goto sigsegv;
610 restore_user_regs(env, sr, 1);
611
612 unlock_user_struct(sr, sr_addr, 1);
613 unlock_user_struct(sc, sc_addr, 1);
614 return -TARGET_QEMU_ESIGRETURN;
615
616sigsegv:
617 unlock_user_struct(sr, sr_addr, 1);
618 unlock_user_struct(sc, sc_addr, 1);
619 force_sig(TARGET_SIGSEGV);
620 return -TARGET_QEMU_ESIGRETURN;
621}
622#endif
623
624
625static int do_setcontext(struct target_ucontext *ucp, CPUPPCState *env, int sig)
626{
627 struct target_mcontext *mcp;
628 target_ulong mcp_addr;
629 sigset_t blocked;
630 target_sigset_t set;
631
632 if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask),
633 sizeof (set)))
634 return 1;
635
636#if defined(TARGET_PPC64)
637 mcp_addr = h2g(ucp) +
638 offsetof(struct target_ucontext, tuc_sigcontext.mcontext);
639#else
640 __get_user(mcp_addr, &ucp->tuc_regs);
641#endif
642
643 if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1))
644 return 1;
645
646 target_to_host_sigset_internal(&blocked, &set);
647 set_sigmask(&blocked);
648 restore_user_regs(env, mcp, sig);
649
650 unlock_user_struct(mcp, mcp_addr, 1);
651 return 0;
652}
653
654long do_rt_sigreturn(CPUPPCState *env)
655{
656 struct target_rt_sigframe *rt_sf = NULL;
657 target_ulong rt_sf_addr;
658
659 rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16;
660 if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1))
661 goto sigsegv;
662
663 if (do_setcontext(&rt_sf->uc, env, 1))
664 goto sigsegv;
665
666 do_sigaltstack(rt_sf_addr
667 + offsetof(struct target_rt_sigframe, uc.tuc_stack),
668 0, env->gpr[1]);
669
670 unlock_user_struct(rt_sf, rt_sf_addr, 1);
671 return -TARGET_QEMU_ESIGRETURN;
672
673sigsegv:
674 unlock_user_struct(rt_sf, rt_sf_addr, 1);
675 force_sig(TARGET_SIGSEGV);
676 return -TARGET_QEMU_ESIGRETURN;
677}
678
679
680abi_long do_swapcontext(CPUArchState *env, abi_ulong uold_ctx,
681 abi_ulong unew_ctx, abi_long ctx_size)
682{
683 struct target_ucontext *uctx;
684 struct target_mcontext *mctx;
685
686
687
688
689 if (ctx_size < sizeof(struct target_ucontext)) {
690 return -TARGET_EINVAL;
691 }
692
693 if (uold_ctx) {
694 TaskState *ts = (TaskState *)thread_cpu->opaque;
695
696 if (!lock_user_struct(VERIFY_WRITE, uctx, uold_ctx, 1)) {
697 return -TARGET_EFAULT;
698 }
699
700#ifdef TARGET_PPC64
701 mctx = &uctx->tuc_sigcontext.mcontext;
702#else
703
704
705
706 mctx = &uctx->tuc_mcontext;
707 __put_user(h2g(mctx), &uctx->tuc_regs);
708#endif
709
710 save_user_regs(env, mctx);
711 host_to_target_sigset(&uctx->tuc_sigmask, &ts->signal_mask);
712
713 unlock_user_struct(uctx, uold_ctx, 1);
714 }
715
716 if (unew_ctx) {
717 int err;
718
719 if (!lock_user_struct(VERIFY_READ, uctx, unew_ctx, 1)) {
720 return -TARGET_EFAULT;
721 }
722 err = do_setcontext(uctx, env, 0);
723 unlock_user_struct(uctx, unew_ctx, 1);
724
725 if (err) {
726
727 force_sig(TARGET_SIGSEGV);
728 }
729 return -TARGET_QEMU_ESIGRETURN;
730 }
731
732 return 0;
733}
734