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31#include <linux/sched.h>
32#include <linux/mm.h>
33#include <linux/kernel.h>
34#include <linux/signal.h>
35#include <linux/syscalls.h>
36#include <linux/errno.h>
37#include <linux/wait.h>
38#include <linux/ptrace.h>
39#include <linux/unistd.h>
40#include <linux/stddef.h>
41#include <linux/highuid.h>
42#include <linux/personality.h>
43#include <linux/tty.h>
44#include <linux/binfmts.h>
45
46#include <asm/setup.h>
47#include <asm/uaccess.h>
48#include <asm/pgtable.h>
49#include <asm/traps.h>
50#include <asm/ucontext.h>
51
52#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
53
54const int frame_extra_sizes[16] = {
55 [1] = -1,
56 [2] = sizeof(((struct frame *)0)->un.fmt2),
57 [3] = sizeof(((struct frame *)0)->un.fmt3),
58 [4] = sizeof(((struct frame *)0)->un.fmt4),
59 [5] = -1,
60 [6] = -1,
61 [7] = sizeof(((struct frame *)0)->un.fmt7),
62 [8] = -1,
63 [9] = sizeof(((struct frame *)0)->un.fmt9),
64 [10] = sizeof(((struct frame *)0)->un.fmta),
65 [11] = sizeof(((struct frame *)0)->un.fmtb),
66 [12] = -1,
67 [13] = -1,
68 [14] = -1,
69 [15] = -1,
70};
71
72
73
74
75asmlinkage int
76sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
77{
78 mask &= _BLOCKABLE;
79 spin_lock_irq(¤t->sighand->siglock);
80 current->saved_sigmask = current->blocked;
81 siginitset(¤t->blocked, mask);
82 recalc_sigpending();
83 spin_unlock_irq(¤t->sighand->siglock);
84
85 current->state = TASK_INTERRUPTIBLE;
86 schedule();
87 set_restore_sigmask();
88
89 return -ERESTARTNOHAND;
90}
91
92asmlinkage int
93sys_sigaction(int sig, const struct old_sigaction __user *act,
94 struct old_sigaction __user *oact)
95{
96 struct k_sigaction new_ka, old_ka;
97 int ret;
98
99 if (act) {
100 old_sigset_t mask;
101 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
102 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
103 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
104 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
105 __get_user(mask, &act->sa_mask))
106 return -EFAULT;
107 siginitset(&new_ka.sa.sa_mask, mask);
108 }
109
110 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
111
112 if (!ret && oact) {
113 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
114 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
115 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
116 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
117 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
118 return -EFAULT;
119 }
120
121 return ret;
122}
123
124asmlinkage int
125sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
126{
127 return do_sigaltstack(uss, uoss, rdusp());
128}
129
130
131
132
133
134
135
136
137
138struct sigframe
139{
140 char __user *pretcode;
141 int sig;
142 int code;
143 struct sigcontext __user *psc;
144 char retcode[8];
145 unsigned long extramask[_NSIG_WORDS-1];
146 struct sigcontext sc;
147};
148
149struct rt_sigframe
150{
151 char __user *pretcode;
152 int sig;
153 struct siginfo __user *pinfo;
154 void __user *puc;
155 char retcode[8];
156 struct siginfo info;
157 struct ucontext uc;
158};
159
160
161static unsigned char fpu_version;
162
163static inline int restore_fpu_state(struct sigcontext *sc)
164{
165 int err = 1;
166
167 if (FPU_IS_EMU) {
168
169 memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
170 memcpy(current->thread.fp, sc->sc_fpregs, 24);
171 return 0;
172 }
173
174 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
175
176 if (!CPU_IS_060 && (sc->sc_fpstate[0] != fpu_version))
177 goto out;
178 if (CPU_IS_020_OR_030) {
179 if (m68k_fputype & FPU_68881 &&
180 !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
181 goto out;
182 if (m68k_fputype & FPU_68882 &&
183 !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
184 goto out;
185 } else if (CPU_IS_040) {
186 if (!(sc->sc_fpstate[1] == 0x00 ||
187 sc->sc_fpstate[1] == 0x28 ||
188 sc->sc_fpstate[1] == 0x60))
189 goto out;
190 } else if (CPU_IS_060) {
191 if (!(sc->sc_fpstate[3] == 0x00 ||
192 sc->sc_fpstate[3] == 0x60 ||
193 sc->sc_fpstate[3] == 0xe0))
194 goto out;
195 } else
196 goto out;
197
198 __asm__ volatile (".chip 68k/68881\n\t"
199 "fmovemx %0,%%fp0-%%fp1\n\t"
200 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
201 ".chip 68k"
202 :
203 : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl));
204 }
205 __asm__ volatile (".chip 68k/68881\n\t"
206 "frestore %0\n\t"
207 ".chip 68k" : : "m" (*sc->sc_fpstate));
208 err = 0;
209
210out:
211 return err;
212}
213
214#define FPCONTEXT_SIZE 216
215#define uc_fpstate uc_filler[0]
216#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4]
217#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1]
218
219static inline int rt_restore_fpu_state(struct ucontext __user *uc)
220{
221 unsigned char fpstate[FPCONTEXT_SIZE];
222 int context_size = CPU_IS_060 ? 8 : 0;
223 fpregset_t fpregs;
224 int err = 1;
225
226 if (FPU_IS_EMU) {
227
228 if (__copy_from_user(current->thread.fpcntl,
229 uc->uc_mcontext.fpregs.f_fpcntl, 12))
230 goto out;
231
232 if (__copy_from_user(current->thread.fp,
233 uc->uc_mcontext.fpregs.f_fpregs, 96))
234 goto out;
235 return 0;
236 }
237
238 if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
239 goto out;
240 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
241 if (!CPU_IS_060)
242 context_size = fpstate[1];
243
244 if (!CPU_IS_060 && (fpstate[0] != fpu_version))
245 goto out;
246 if (CPU_IS_020_OR_030) {
247 if (m68k_fputype & FPU_68881 &&
248 !(context_size == 0x18 || context_size == 0xb4))
249 goto out;
250 if (m68k_fputype & FPU_68882 &&
251 !(context_size == 0x38 || context_size == 0xd4))
252 goto out;
253 } else if (CPU_IS_040) {
254 if (!(context_size == 0x00 ||
255 context_size == 0x28 ||
256 context_size == 0x60))
257 goto out;
258 } else if (CPU_IS_060) {
259 if (!(fpstate[3] == 0x00 ||
260 fpstate[3] == 0x60 ||
261 fpstate[3] == 0xe0))
262 goto out;
263 } else
264 goto out;
265 if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
266 sizeof(fpregs)))
267 goto out;
268 __asm__ volatile (".chip 68k/68881\n\t"
269 "fmovemx %0,%%fp0-%%fp7\n\t"
270 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
271 ".chip 68k"
272 :
273 : "m" (*fpregs.f_fpregs),
274 "m" (*fpregs.f_fpcntl));
275 }
276 if (context_size &&
277 __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
278 context_size))
279 goto out;
280 __asm__ volatile (".chip 68k/68881\n\t"
281 "frestore %0\n\t"
282 ".chip 68k" : : "m" (*fpstate));
283 err = 0;
284
285out:
286 return err;
287}
288
289static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
290 void __user *fp)
291{
292 int fsize = frame_extra_sizes[formatvec >> 12];
293 if (fsize < 0) {
294
295
296
297#ifdef DEBUG
298 printk("user process returning with weird frame format\n");
299#endif
300 return 1;
301 }
302 if (!fsize) {
303 regs->format = formatvec >> 12;
304 regs->vector = formatvec & 0xfff;
305 } else {
306 struct switch_stack *sw = (struct switch_stack *)regs - 1;
307 unsigned long buf[fsize / 2];
308
309
310 if (copy_from_user(buf + fsize / 4, fp, fsize))
311 return 1;
312
313
314 regs->format = formatvec >> 12;
315 regs->vector = formatvec & 0xfff;
316#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
317 __asm__ __volatile__
318 (" movel %0,%/a0\n\t"
319 " subl %1,%/a0\n\t"
320 " movel %/a0,%/sp\n\t"
321
322 "1: movel %0@+,%/a0@+\n\t"
323 " dbra %2,1b\n\t"
324 " lea %/sp@(%c3),%/a0\n\t"
325 " lsrl #2,%1\n\t"
326 " subql #1,%1\n\t"
327
328 "2: movel %4@+,%/a0@+\n\t"
329 " dbra %1,2b\n\t"
330 " bral ret_from_signal\n"
331 :
332 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
333 "n" (frame_offset), "a" (buf + fsize/4)
334 : "a0");
335#undef frame_offset
336 }
337 return 0;
338}
339
340static inline int
341restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
342{
343 int formatvec;
344 struct sigcontext context;
345 int err;
346
347
348 current_thread_info()->restart_block.fn = do_no_restart_syscall;
349
350
351 if (copy_from_user(&context, usc, sizeof(context)))
352 goto badframe;
353
354
355 regs->d0 = context.sc_d0;
356 regs->d1 = context.sc_d1;
357 regs->a0 = context.sc_a0;
358 regs->a1 = context.sc_a1;
359 regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
360 regs->pc = context.sc_pc;
361 regs->orig_d0 = -1;
362 wrusp(context.sc_usp);
363 formatvec = context.sc_formatvec;
364
365 err = restore_fpu_state(&context);
366
367 if (err || mangle_kernel_stack(regs, formatvec, fp))
368 goto badframe;
369
370 return 0;
371
372badframe:
373 return 1;
374}
375
376static inline int
377rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
378 struct ucontext __user *uc)
379{
380 int temp;
381 greg_t __user *gregs = uc->uc_mcontext.gregs;
382 unsigned long usp;
383 int err;
384
385
386 current_thread_info()->restart_block.fn = do_no_restart_syscall;
387
388 err = __get_user(temp, &uc->uc_mcontext.version);
389 if (temp != MCONTEXT_VERSION)
390 goto badframe;
391
392 err |= __get_user(regs->d0, &gregs[0]);
393 err |= __get_user(regs->d1, &gregs[1]);
394 err |= __get_user(regs->d2, &gregs[2]);
395 err |= __get_user(regs->d3, &gregs[3]);
396 err |= __get_user(regs->d4, &gregs[4]);
397 err |= __get_user(regs->d5, &gregs[5]);
398 err |= __get_user(sw->d6, &gregs[6]);
399 err |= __get_user(sw->d7, &gregs[7]);
400 err |= __get_user(regs->a0, &gregs[8]);
401 err |= __get_user(regs->a1, &gregs[9]);
402 err |= __get_user(regs->a2, &gregs[10]);
403 err |= __get_user(sw->a3, &gregs[11]);
404 err |= __get_user(sw->a4, &gregs[12]);
405 err |= __get_user(sw->a5, &gregs[13]);
406 err |= __get_user(sw->a6, &gregs[14]);
407 err |= __get_user(usp, &gregs[15]);
408 wrusp(usp);
409 err |= __get_user(regs->pc, &gregs[16]);
410 err |= __get_user(temp, &gregs[17]);
411 regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
412 regs->orig_d0 = -1;
413 err |= __get_user(temp, &uc->uc_formatvec);
414
415 err |= rt_restore_fpu_state(uc);
416
417 if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
418 goto badframe;
419
420 if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
421 goto badframe;
422
423 return 0;
424
425badframe:
426 return 1;
427}
428
429asmlinkage int do_sigreturn(unsigned long __unused)
430{
431 struct switch_stack *sw = (struct switch_stack *) &__unused;
432 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
433 unsigned long usp = rdusp();
434 struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
435 sigset_t set;
436
437 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
438 goto badframe;
439 if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
440 (_NSIG_WORDS > 1 &&
441 __copy_from_user(&set.sig[1], &frame->extramask,
442 sizeof(frame->extramask))))
443 goto badframe;
444
445 sigdelsetmask(&set, ~_BLOCKABLE);
446 current->blocked = set;
447 recalc_sigpending();
448
449 if (restore_sigcontext(regs, &frame->sc, frame + 1))
450 goto badframe;
451 return regs->d0;
452
453badframe:
454 force_sig(SIGSEGV, current);
455 return 0;
456}
457
458asmlinkage int do_rt_sigreturn(unsigned long __unused)
459{
460 struct switch_stack *sw = (struct switch_stack *) &__unused;
461 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
462 unsigned long usp = rdusp();
463 struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
464 sigset_t set;
465
466 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
467 goto badframe;
468 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
469 goto badframe;
470
471 sigdelsetmask(&set, ~_BLOCKABLE);
472 current->blocked = set;
473 recalc_sigpending();
474
475 if (rt_restore_ucontext(regs, sw, &frame->uc))
476 goto badframe;
477 return regs->d0;
478
479badframe:
480 force_sig(SIGSEGV, current);
481 return 0;
482}
483
484
485
486
487
488static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
489{
490 if (FPU_IS_EMU) {
491
492 memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
493 memcpy(sc->sc_fpregs, current->thread.fp, 24);
494 return;
495 }
496
497 __asm__ volatile (".chip 68k/68881\n\t"
498 "fsave %0\n\t"
499 ".chip 68k"
500 : : "m" (*sc->sc_fpstate) : "memory");
501
502 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
503 fpu_version = sc->sc_fpstate[0];
504 if (CPU_IS_020_OR_030 &&
505 regs->vector >= (VEC_FPBRUC * 4) &&
506 regs->vector <= (VEC_FPNAN * 4)) {
507
508 if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
509 sc->sc_fpstate[0x38] |= 1 << 3;
510 }
511 __asm__ volatile (".chip 68k/68881\n\t"
512 "fmovemx %%fp0-%%fp1,%0\n\t"
513 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
514 ".chip 68k"
515 : "=m" (*sc->sc_fpregs),
516 "=m" (*sc->sc_fpcntl)
517 :
518 : "memory");
519 }
520}
521
522static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
523{
524 unsigned char fpstate[FPCONTEXT_SIZE];
525 int context_size = CPU_IS_060 ? 8 : 0;
526 int err = 0;
527
528 if (FPU_IS_EMU) {
529
530 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
531 current->thread.fpcntl, 12);
532
533 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
534 current->thread.fp, 96);
535 return err;
536 }
537
538 __asm__ volatile (".chip 68k/68881\n\t"
539 "fsave %0\n\t"
540 ".chip 68k"
541 : : "m" (*fpstate) : "memory");
542
543 err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
544 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
545 fpregset_t fpregs;
546 if (!CPU_IS_060)
547 context_size = fpstate[1];
548 fpu_version = fpstate[0];
549 if (CPU_IS_020_OR_030 &&
550 regs->vector >= (VEC_FPBRUC * 4) &&
551 regs->vector <= (VEC_FPNAN * 4)) {
552
553 if (*(unsigned short *) fpstate == 0x1f38)
554 fpstate[0x38] |= 1 << 3;
555 }
556 __asm__ volatile (".chip 68k/68881\n\t"
557 "fmovemx %%fp0-%%fp7,%0\n\t"
558 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
559 ".chip 68k"
560 : "=m" (*fpregs.f_fpregs),
561 "=m" (*fpregs.f_fpcntl)
562 :
563 : "memory");
564 err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
565 sizeof(fpregs));
566 }
567 if (context_size)
568 err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
569 context_size);
570 return err;
571}
572
573static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
574 unsigned long mask)
575{
576 sc->sc_mask = mask;
577 sc->sc_usp = rdusp();
578 sc->sc_d0 = regs->d0;
579 sc->sc_d1 = regs->d1;
580 sc->sc_a0 = regs->a0;
581 sc->sc_a1 = regs->a1;
582 sc->sc_sr = regs->sr;
583 sc->sc_pc = regs->pc;
584 sc->sc_formatvec = regs->format << 12 | regs->vector;
585 save_fpu_state(sc, regs);
586}
587
588static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
589{
590 struct switch_stack *sw = (struct switch_stack *)regs - 1;
591 greg_t __user *gregs = uc->uc_mcontext.gregs;
592 int err = 0;
593
594 err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
595 err |= __put_user(regs->d0, &gregs[0]);
596 err |= __put_user(regs->d1, &gregs[1]);
597 err |= __put_user(regs->d2, &gregs[2]);
598 err |= __put_user(regs->d3, &gregs[3]);
599 err |= __put_user(regs->d4, &gregs[4]);
600 err |= __put_user(regs->d5, &gregs[5]);
601 err |= __put_user(sw->d6, &gregs[6]);
602 err |= __put_user(sw->d7, &gregs[7]);
603 err |= __put_user(regs->a0, &gregs[8]);
604 err |= __put_user(regs->a1, &gregs[9]);
605 err |= __put_user(regs->a2, &gregs[10]);
606 err |= __put_user(sw->a3, &gregs[11]);
607 err |= __put_user(sw->a4, &gregs[12]);
608 err |= __put_user(sw->a5, &gregs[13]);
609 err |= __put_user(sw->a6, &gregs[14]);
610 err |= __put_user(rdusp(), &gregs[15]);
611 err |= __put_user(regs->pc, &gregs[16]);
612 err |= __put_user(regs->sr, &gregs[17]);
613 err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
614 err |= rt_save_fpu_state(uc, regs);
615 return err;
616}
617
618static inline void push_cache (unsigned long vaddr)
619{
620
621
622
623
624
625
626
627
628
629 if (CPU_IS_040) {
630 unsigned long temp;
631
632 __asm__ __volatile__ (".chip 68040\n\t"
633 "nop\n\t"
634 "ptestr (%1)\n\t"
635 "movec %%mmusr,%0\n\t"
636 ".chip 68k"
637 : "=r" (temp)
638 : "a" (vaddr));
639
640 temp &= PAGE_MASK;
641 temp |= vaddr & ~PAGE_MASK;
642
643 __asm__ __volatile__ (".chip 68040\n\t"
644 "nop\n\t"
645 "cpushl %%bc,(%0)\n\t"
646 ".chip 68k"
647 : : "a" (temp));
648 }
649 else if (CPU_IS_060) {
650 unsigned long temp;
651 __asm__ __volatile__ (".chip 68060\n\t"
652 "plpar (%0)\n\t"
653 ".chip 68k"
654 : "=a" (temp)
655 : "0" (vaddr));
656 __asm__ __volatile__ (".chip 68060\n\t"
657 "cpushl %%bc,(%0)\n\t"
658 ".chip 68k"
659 : : "a" (temp));
660 }
661 else {
662
663
664
665
666
667 unsigned long temp;
668 asm volatile ("movec %%cacr,%0" : "=r" (temp));
669 temp += 4;
670 asm volatile ("movec %0,%%caar\n\t"
671 "movec %1,%%cacr"
672 : : "r" (vaddr), "r" (temp));
673 asm volatile ("movec %0,%%caar\n\t"
674 "movec %1,%%cacr"
675 : : "r" (vaddr + 4), "r" (temp));
676 }
677}
678
679static inline void __user *
680get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
681{
682 unsigned long usp;
683
684
685 usp = rdusp();
686
687
688 if (ka->sa.sa_flags & SA_ONSTACK) {
689 if (!sas_ss_flags(usp))
690 usp = current->sas_ss_sp + current->sas_ss_size;
691 }
692 return (void __user *)((usp - frame_size) & -8UL);
693}
694
695static int setup_frame (int sig, struct k_sigaction *ka,
696 sigset_t *set, struct pt_regs *regs)
697{
698 struct sigframe __user *frame;
699 int fsize = frame_extra_sizes[regs->format];
700 struct sigcontext context;
701 int err = 0;
702
703 if (fsize < 0) {
704#ifdef DEBUG
705 printk ("setup_frame: Unknown frame format %#x\n",
706 regs->format);
707#endif
708 goto give_sigsegv;
709 }
710
711 frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
712
713 if (fsize)
714 err |= copy_to_user (frame + 1, regs + 1, fsize);
715
716 err |= __put_user((current_thread_info()->exec_domain
717 && current_thread_info()->exec_domain->signal_invmap
718 && sig < 32
719 ? current_thread_info()->exec_domain->signal_invmap[sig]
720 : sig),
721 &frame->sig);
722
723 err |= __put_user(regs->vector, &frame->code);
724 err |= __put_user(&frame->sc, &frame->psc);
725
726 if (_NSIG_WORDS > 1)
727 err |= copy_to_user(frame->extramask, &set->sig[1],
728 sizeof(frame->extramask));
729
730 setup_sigcontext(&context, regs, set->sig[0]);
731 err |= copy_to_user (&frame->sc, &context, sizeof(context));
732
733
734 err |= __put_user(frame->retcode, &frame->pretcode);
735
736 err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
737 (long __user *)(frame->retcode));
738
739 if (err)
740 goto give_sigsegv;
741
742 push_cache ((unsigned long) &frame->retcode);
743
744
745
746
747
748 wrusp ((unsigned long) frame);
749 regs->pc = (unsigned long) ka->sa.sa_handler;
750
751
752
753
754
755
756 if (fsize)
757 regs->stkadj = fsize;
758
759
760 if (regs->stkadj) {
761 struct pt_regs *tregs =
762 (struct pt_regs *)((ulong)regs + regs->stkadj);
763#ifdef DEBUG
764 printk("Performing stackadjust=%04x\n", regs->stkadj);
765#endif
766
767
768 tregs->vector = 0;
769 tregs->format = 0;
770 tregs->pc = regs->pc;
771 tregs->sr = regs->sr;
772 }
773 return 0;
774
775give_sigsegv:
776 force_sigsegv(sig, current);
777 return err;
778}
779
780static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
781 sigset_t *set, struct pt_regs *regs)
782{
783 struct rt_sigframe __user *frame;
784 int fsize = frame_extra_sizes[regs->format];
785 int err = 0;
786
787 if (fsize < 0) {
788#ifdef DEBUG
789 printk ("setup_frame: Unknown frame format %#x\n",
790 regs->format);
791#endif
792 goto give_sigsegv;
793 }
794
795 frame = get_sigframe(ka, regs, sizeof(*frame));
796
797 if (fsize)
798 err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
799
800 err |= __put_user((current_thread_info()->exec_domain
801 && current_thread_info()->exec_domain->signal_invmap
802 && sig < 32
803 ? current_thread_info()->exec_domain->signal_invmap[sig]
804 : sig),
805 &frame->sig);
806 err |= __put_user(&frame->info, &frame->pinfo);
807 err |= __put_user(&frame->uc, &frame->puc);
808 err |= copy_siginfo_to_user(&frame->info, info);
809
810
811 err |= __put_user(0, &frame->uc.uc_flags);
812 err |= __put_user(NULL, &frame->uc.uc_link);
813 err |= __put_user((void __user *)current->sas_ss_sp,
814 &frame->uc.uc_stack.ss_sp);
815 err |= __put_user(sas_ss_flags(rdusp()),
816 &frame->uc.uc_stack.ss_flags);
817 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
818 err |= rt_setup_ucontext(&frame->uc, regs);
819 err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
820
821
822 err |= __put_user(frame->retcode, &frame->pretcode);
823#ifdef __mcoldfire__
824
825 err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
826 err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
827 (long __user *)(frame->retcode + 4));
828#else
829
830 err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
831 (long __user *)(frame->retcode + 0));
832 err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
833#endif
834
835 if (err)
836 goto give_sigsegv;
837
838 push_cache ((unsigned long) &frame->retcode);
839
840
841
842
843
844 wrusp ((unsigned long) frame);
845 regs->pc = (unsigned long) ka->sa.sa_handler;
846
847
848
849
850
851
852 if (fsize)
853 regs->stkadj = fsize;
854
855
856 if (regs->stkadj) {
857 struct pt_regs *tregs =
858 (struct pt_regs *)((ulong)regs + regs->stkadj);
859#ifdef DEBUG
860 printk("Performing stackadjust=%04x\n", regs->stkadj);
861#endif
862
863
864 tregs->vector = 0;
865 tregs->format = 0;
866 tregs->pc = regs->pc;
867 tregs->sr = regs->sr;
868 }
869 return 0;
870
871give_sigsegv:
872 force_sigsegv(sig, current);
873 return err;
874}
875
876static inline void
877handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
878{
879 switch (regs->d0) {
880 case -ERESTARTNOHAND:
881 if (!has_handler)
882 goto do_restart;
883 regs->d0 = -EINTR;
884 break;
885
886 case -ERESTART_RESTARTBLOCK:
887 if (!has_handler) {
888 regs->d0 = __NR_restart_syscall;
889 regs->pc -= 2;
890 break;
891 }
892 regs->d0 = -EINTR;
893 break;
894
895 case -ERESTARTSYS:
896 if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
897 regs->d0 = -EINTR;
898 break;
899 }
900
901 case -ERESTARTNOINTR:
902 do_restart:
903 regs->d0 = regs->orig_d0;
904 regs->pc -= 2;
905 break;
906 }
907}
908
909void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
910{
911 if (regs->orig_d0 < 0)
912 return;
913 switch (regs->d0) {
914 case -ERESTARTNOHAND:
915 case -ERESTARTSYS:
916 case -ERESTARTNOINTR:
917 regs->d0 = regs->orig_d0;
918 regs->orig_d0 = -1;
919 regs->pc -= 2;
920 break;
921 }
922}
923
924
925
926
927static void
928handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
929 sigset_t *oldset, struct pt_regs *regs)
930{
931 int err;
932
933 if (regs->orig_d0 >= 0)
934
935 handle_restart(regs, ka, 1);
936
937
938 if (ka->sa.sa_flags & SA_SIGINFO)
939 err = setup_rt_frame(sig, ka, info, oldset, regs);
940 else
941 err = setup_frame(sig, ka, oldset, regs);
942
943 if (err)
944 return;
945
946 sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
947 if (!(ka->sa.sa_flags & SA_NODEFER))
948 sigaddset(¤t->blocked,sig);
949 recalc_sigpending();
950
951 if (test_thread_flag(TIF_DELAYED_TRACE)) {
952 regs->sr &= ~0x8000;
953 send_sig(SIGTRAP, current, 1);
954 }
955
956 clear_thread_flag(TIF_RESTORE_SIGMASK);
957}
958
959
960
961
962
963
964asmlinkage void do_signal(struct pt_regs *regs)
965{
966 siginfo_t info;
967 struct k_sigaction ka;
968 int signr;
969 sigset_t *oldset;
970
971 current->thread.esp0 = (unsigned long) regs;
972
973 if (test_thread_flag(TIF_RESTORE_SIGMASK))
974 oldset = ¤t->saved_sigmask;
975 else
976 oldset = ¤t->blocked;
977
978 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
979 if (signr > 0) {
980
981 handle_signal(signr, &ka, &info, oldset, regs);
982 return;
983 }
984
985
986 if (regs->orig_d0 >= 0)
987
988 handle_restart(regs, NULL, 0);
989
990
991 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
992 clear_thread_flag(TIF_RESTORE_SIGMASK);
993 sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL);
994 }
995}
996