1 /*
2 * irixsig.c: WHEEE, IRIX signals! YOW, am I compatable or what?!?!
3 *
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
5 * Copyright (C) 1997 - 2000 Ralf Baechle (ralf@gnu.org)
6 * Copyright (C) 2000 Silicon Graphics, Inc.
7 */
8 #include <linux/kernel.h>
9 #include <linux/sched.h>
10 #include <linux/mm.h>
11 #include <linux/errno.h>
12 #include <linux/smp.h>
13 #include <linux/smp_lock.h>
14 #include <linux/time.h>
15
16 #include <asm/ptrace.h>
17 #include <asm/uaccess.h>
18
19 extern asmlinkage void syscall_trace(void);
20
21 #undef DEBUG_SIG
22
23 #define _S(nr) (1<<((nr)-1))
24
25 #define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
26
27 typedef struct {
28 unsigned long sig[4];
29 } irix_sigset_t;
30
31 struct sigctx_irix5 {
32 u32 rmask, cp0_status;
33 u64 pc;
34 u64 regs[32];
35 u64 fpregs[32];
36 u32 usedfp, fpcsr, fpeir, sstk_flags;
37 u64 hi, lo;
38 u64 cp0_cause, cp0_badvaddr, _unused0;
39 irix_sigset_t sigset;
40 u64 weird_fpu_thing;
41 u64 _unused1[31];
42 };
43
44 #ifdef DEBUG_SIG
45 /* Debugging */
dump_irix5_sigctx(struct sigctx_irix5 * c)46 static inline void dump_irix5_sigctx(struct sigctx_irix5 *c)
47 {
48 int i;
49
50 printk("misc: rmask[%08lx] status[%08lx] pc[%08lx]\n",
51 (unsigned long) c->rmask,
52 (unsigned long) c->cp0_status,
53 (unsigned long) c->pc);
54 printk("regs: ");
55 for(i = 0; i < 16; i++)
56 printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
57 printk("\nregs: ");
58 for(i = 16; i < 32; i++)
59 printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
60 printk("\nfpregs: ");
61 for(i = 0; i < 16; i++)
62 printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
63 printk("\nfpregs: ");
64 for(i = 16; i < 32; i++)
65 printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
66 printk("misc: usedfp[%d] fpcsr[%08lx] fpeir[%08lx] stk_flgs[%08lx]\n",
67 (int) c->usedfp, (unsigned long) c->fpcsr,
68 (unsigned long) c->fpeir, (unsigned long) c->sstk_flags);
69 printk("misc: hi[%08lx] lo[%08lx] cause[%08lx] badvaddr[%08lx]\n",
70 (unsigned long) c->hi, (unsigned long) c->lo,
71 (unsigned long) c->cp0_cause, (unsigned long) c->cp0_badvaddr);
72 printk("misc: sigset<0>[%08lx] sigset<1>[%08lx] sigset<2>[%08lx] "
73 "sigset<3>[%08lx]\n", (unsigned long) c->sigset.sig[0],
74 (unsigned long) c->sigset.sig[1],
75 (unsigned long) c->sigset.sig[2],
76 (unsigned long) c->sigset.sig[3]);
77 }
78 #endif
79
setup_irix_frame(struct k_sigaction * ka,struct pt_regs * regs,int signr,sigset_t * oldmask)80 static void setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
81 int signr, sigset_t *oldmask)
82 {
83 unsigned long sp;
84 struct sigctx_irix5 *ctx;
85 int i;
86
87 sp = regs->regs[29];
88 sp -= sizeof(struct sigctx_irix5);
89 sp &= ~(0xf);
90 ctx = (struct sigctx_irix5 *) sp;
91 if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
92 goto segv_and_exit;
93
94 __put_user(0, &ctx->weird_fpu_thing);
95 __put_user(~(0x00000001), &ctx->rmask);
96 __put_user(0, &ctx->regs[0]);
97 for(i = 1; i < 32; i++)
98 __put_user((u64) regs->regs[i], &ctx->regs[i]);
99
100 __put_user((u64) regs->hi, &ctx->hi);
101 __put_user((u64) regs->lo, &ctx->lo);
102 __put_user((u64) regs->cp0_epc, &ctx->pc);
103 __put_user(current->used_math, &ctx->usedfp);
104 __put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
105 __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);
106
107 __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */
108
109 __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t));
110
111 #ifdef DEBUG_SIG
112 dump_irix5_sigctx(ctx);
113 #endif
114
115 regs->regs[4] = (unsigned long) signr;
116 regs->regs[5] = 0; /* XXX sigcode XXX */
117 regs->regs[6] = regs->regs[29] = sp;
118 regs->regs[7] = (unsigned long) ka->sa.sa_handler;
119 regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;
120
121 return;
122
123 segv_and_exit:
124 if (signr == SIGSEGV)
125 ka->sa.sa_handler = SIG_DFL;
126 force_sig(SIGSEGV, current);
127 }
128
129 static void inline
setup_irix_rt_frame(struct k_sigaction * ka,struct pt_regs * regs,int signr,sigset_t * oldmask,siginfo_t * info)130 setup_irix_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
131 int signr, sigset_t *oldmask, siginfo_t *info)
132 {
133 printk("Aiee: setup_tr_frame wants to be written");
134 do_exit(SIGSEGV);
135 }
136
handle_signal(unsigned long sig,struct k_sigaction * ka,siginfo_t * info,sigset_t * oldset,struct pt_regs * regs)137 static inline void handle_signal(unsigned long sig, struct k_sigaction *ka,
138 siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
139 {
140 if (ka->sa.sa_flags & SA_SIGINFO)
141 setup_irix_rt_frame(ka, regs, sig, oldset, info);
142 else
143 setup_irix_frame(ka, regs, sig, oldset);
144
145 if (ka->sa.sa_flags & SA_ONESHOT)
146 ka->sa.sa_handler = SIG_DFL;
147 if (!(ka->sa.sa_flags & SA_NODEFER)) {
148 spin_lock_irq(¤t->sigmask_lock);
149 sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
150 sigaddset(¤t->blocked,sig);
151 recalc_sigpending(current);
152 spin_unlock_irq(¤t->sigmask_lock);
153 }
154 }
155
syscall_restart(struct pt_regs * regs,struct k_sigaction * ka)156 static inline void syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
157 {
158 switch(regs->regs[0]) {
159 case ERESTARTNOHAND:
160 regs->regs[2] = EINTR;
161 break;
162 case ERESTARTSYS:
163 if(!(ka->sa.sa_flags & SA_RESTART)) {
164 regs->regs[2] = EINTR;
165 break;
166 }
167 /* fallthrough */
168 case ERESTARTNOINTR: /* Userland will reload $v0. */
169 regs->cp0_epc -= 8;
170 }
171
172 regs->regs[0] = 0; /* Don't deal with this again. */
173 }
174
do_irix_signal(sigset_t * oldset,struct pt_regs * regs)175 asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs)
176 {
177 struct k_sigaction *ka;
178 siginfo_t info;
179
180 if (!oldset)
181 oldset = ¤t->blocked;
182
183 for (;;) {
184 unsigned long signr;
185
186 spin_lock_irq(¤t->sigmask_lock);
187 signr = dequeue_signal(¤t->blocked, &info);
188 spin_unlock_irq(¤t->sigmask_lock);
189
190 if (!signr)
191 break;
192
193 if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
194 /* Let the debugger run. */
195 current->exit_code = signr;
196 current->state = TASK_STOPPED;
197 notify_parent(current, SIGCHLD);
198 schedule();
199
200 /* We're back. Did the debugger cancel the sig? */
201 if (!(signr = current->exit_code))
202 continue;
203 current->exit_code = 0;
204
205 /* The debugger continued. Ignore SIGSTOP. */
206 if (signr == SIGSTOP)
207 continue;
208
209 /* Update the siginfo structure. Is this good? */
210 if (signr != info.si_signo) {
211 info.si_signo = signr;
212 info.si_errno = 0;
213 info.si_code = SI_USER;
214 info.si_pid = current->p_pptr->pid;
215 info.si_uid = current->p_pptr->uid;
216 }
217
218 /* If the (new) signal is now blocked, requeue it. */
219 if (sigismember(¤t->blocked, signr)) {
220 send_sig_info(signr, &info, current);
221 continue;
222 }
223 }
224
225 ka = ¤t->sig->action[signr-1];
226 if (ka->sa.sa_handler == SIG_IGN) {
227 if (signr != SIGCHLD)
228 continue;
229 /* Check for SIGCHLD: it's special. */
230 while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
231 /* nothing */;
232 continue;
233 }
234
235 if (ka->sa.sa_handler == SIG_DFL) {
236 int exit_code = signr;
237
238 /* Init gets no signals it doesn't want. */
239 if (current->pid == 1)
240 continue;
241
242 switch (signr) {
243 case SIGCONT: case SIGCHLD: case SIGWINCH:
244 continue;
245
246 case SIGTSTP: case SIGTTIN: case SIGTTOU:
247 if (is_orphaned_pgrp(current->pgrp))
248 continue;
249 /* FALLTHRU */
250
251 case SIGSTOP:
252 current->state = TASK_STOPPED;
253 current->exit_code = signr;
254 if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDSTOP))
255 notify_parent(current, SIGCHLD);
256 schedule();
257 continue;
258
259 case SIGQUIT: case SIGILL: case SIGTRAP:
260 case SIGABRT: case SIGFPE: case SIGSEGV:
261 if (do_coredump(signr, regs))
262 exit_code |= 0x80;
263 /* FALLTHRU */
264
265 default:
266 sigaddset(¤t->pending.signal, signr);
267 recalc_sigpending(current);
268 current->flags |= PF_SIGNALED;
269 do_exit(exit_code);
270 /* NOTREACHED */
271 }
272 }
273
274 if (regs->regs[0])
275 syscall_restart(regs, ka);
276 /* Whee! Actually deliver the signal. */
277 handle_signal(signr, ka, &info, oldset, regs);
278 return 1;
279 }
280
281 /*
282 * Who's code doesn't conform to the restartable syscall convention
283 * dies here!!! The li instruction, a single machine instruction,
284 * must directly be followed by the syscall instruction.
285 */
286 if (regs->regs[0]) {
287 if (regs->regs[2] == ERESTARTNOHAND ||
288 regs->regs[2] == ERESTARTSYS ||
289 regs->regs[2] == ERESTARTNOINTR) {
290 regs->cp0_epc -= 8;
291 }
292 }
293 return 0;
294 }
295
296 asmlinkage void
irix_sigreturn(struct pt_regs * regs)297 irix_sigreturn(struct pt_regs *regs)
298 {
299 struct sigctx_irix5 *context, *magic;
300 unsigned long umask, mask;
301 u64 *fregs;
302 int sig, i, base = 0;
303 sigset_t blocked;
304
305 if(regs->regs[2] == 1000)
306 base = 1;
307
308 context = (struct sigctx_irix5 *) regs->regs[base + 4];
309 magic = (struct sigctx_irix5 *) regs->regs[base + 5];
310 sig = (int) regs->regs[base + 6];
311 #ifdef DEBUG_SIG
312 printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
313 current->comm, current->pid, context, magic, sig);
314 #endif
315 if (!context)
316 context = magic;
317 if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
318 goto badframe;
319
320 #ifdef DEBUG_SIG
321 dump_irix5_sigctx(context);
322 #endif
323
324 __get_user(regs->cp0_epc, &context->pc);
325 umask = context->rmask; mask = 2;
326 for (i = 1; i < 32; i++, mask <<= 1) {
327 if(umask & mask)
328 __get_user(regs->regs[i], &context->regs[i]);
329 }
330 __get_user(regs->hi, &context->hi);
331 __get_user(regs->lo, &context->lo);
332
333 if ((umask & 1) && context->usedfp) {
334 fregs = (u64 *) ¤t->thread.fpu;
335 for(i = 0; i < 32; i++)
336 fregs[i] = (u64) context->fpregs[i];
337 __get_user(current->thread.fpu.hard.control, &context->fpcsr);
338 }
339
340 /* XXX do sigstack crapola here... XXX */
341
342 if (__copy_from_user(&blocked, &context->sigset, sizeof(blocked)))
343 goto badframe;
344
345 sigdelsetmask(&blocked, ~_BLOCKABLE);
346 spin_lock_irq(¤t->sigmask_lock);
347 current->blocked = blocked;
348 recalc_sigpending(current);
349 spin_unlock_irq(¤t->sigmask_lock);
350
351 /*
352 * Don't let your children do this ...
353 */
354 if (current->ptrace & PT_TRACESYS)
355 syscall_trace();
356 __asm__ __volatile__(
357 "move\t$29,%0\n\t"
358 "j\tret_from_sys_call"
359 :/* no outputs */
360 :"r" (®s));
361 /* Unreached */
362
363 badframe:
364 force_sig(SIGSEGV, current);
365 }
366
367 struct sigact_irix5 {
368 int flags;
369 void (*handler)(int);
370 u32 sigset[4];
371 int _unused0[2];
372 };
373
374 #ifdef DEBUG_SIG
dump_sigact_irix5(struct sigact_irix5 * p)375 static inline void dump_sigact_irix5(struct sigact_irix5 *p)
376 {
377 printk("<f[%d] hndlr[%08lx] msk[%08lx]>", p->flags,
378 (unsigned long) p->handler,
379 (unsigned long) p->sigset[0]);
380 }
381 #endif
382
383 asmlinkage int
irix_sigaction(int sig,const struct sigaction * act,struct sigaction * oact,void * trampoline)384 irix_sigaction(int sig, const struct sigaction *act,
385 struct sigaction *oact, void *trampoline)
386 {
387 struct k_sigaction new_ka, old_ka;
388 int ret;
389
390 #ifdef DEBUG_SIG
391 printk(" (%d,%s,%s,%08lx) ", sig, (!new ? "0" : "NEW"),
392 (!old ? "0" : "OLD"), trampoline);
393 if(new) {
394 dump_sigact_irix5(new); printk(" ");
395 }
396 #endif
397 if (act) {
398 sigset_t mask;
399 if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
400 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
401 __get_user(new_ka.sa.sa_flags, &act->sa_flags))
402 return -EFAULT;
403
404 __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t));
405
406 /*
407 * Hmmm... methinks IRIX libc always passes a valid trampoline
408 * value for all invocations of sigaction. Will have to
409 * investigate. POSIX POSIX, die die die...
410 */
411 new_ka.sa_restorer = trampoline;
412 }
413
414 /* XXX Implement SIG_SETMASK32 for IRIX compatibility */
415 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
416
417 if (!ret && oact) {
418 if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
419 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
420 __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
421 return -EFAULT;
422 __copy_to_user(&old_ka.sa.sa_mask, &oact->sa_mask,
423 sizeof(sigset_t));
424 }
425
426 return ret;
427 }
428
irix_sigpending(irix_sigset_t * set)429 asmlinkage int irix_sigpending(irix_sigset_t *set)
430 {
431 return do_sigpending(set, sizeof(*set));
432 }
433
irix_sigprocmask(int how,irix_sigset_t * new,irix_sigset_t * old)434 asmlinkage int irix_sigprocmask(int how, irix_sigset_t *new, irix_sigset_t *old)
435 {
436 sigset_t oldbits, newbits;
437 int error;
438
439 if (new) {
440 error = verify_area(VERIFY_READ, new, sizeof(*new));
441 if (error)
442 return error;
443 __copy_from_user(&newbits, new, sizeof(unsigned long)*4);
444 sigdelsetmask(&newbits, ~_BLOCKABLE);
445
446 spin_lock_irq(¤t->sigmask_lock);
447 oldbits = current->blocked;
448
449 switch(how) {
450 case 1:
451 sigorsets(&newbits, &oldbits, &newbits);
452 break;
453
454 case 2:
455 sigandsets(&newbits, &oldbits, &newbits);
456 break;
457
458 case 3:
459 break;
460
461 case 256:
462 siginitset(&newbits, newbits.sig[0]);
463 break;
464
465 default:
466 return -EINVAL;
467 }
468 recalc_sigpending(current);
469 spin_unlock_irq(¤t->sigmask_lock);
470 }
471 if(old) {
472 error = verify_area(VERIFY_WRITE, old, sizeof(*old));
473 if(error)
474 return error;
475 __copy_to_user(old, ¤t->blocked, sizeof(unsigned long)*4);
476 }
477
478 return 0;
479 }
480
irix_sigsuspend(struct pt_regs * regs)481 asmlinkage int irix_sigsuspend(struct pt_regs *regs)
482 {
483 sigset_t *uset, saveset, newset;
484
485 uset = (sigset_t *) regs->regs[4];
486 if (copy_from_user(&newset, uset, sizeof(sigset_t)))
487 return -EFAULT;
488 sigdelsetmask(&newset, ~_BLOCKABLE);
489
490 spin_lock_irq(¤t->sigmask_lock);
491 saveset = current->blocked;
492 current->blocked = newset;
493 recalc_sigpending(current);
494 spin_unlock_irq(¤t->sigmask_lock);
495
496 regs->regs[2] = -EINTR;
497 while (1) {
498 current->state = TASK_INTERRUPTIBLE;
499 schedule();
500 if (do_irix_signal(&saveset, regs))
501 return -EINTR;
502 }
503 }
504
505 /* hate hate hate... */
506 struct irix5_siginfo {
507 int sig, code, error;
508 union {
509 char unused[128 - (3 * 4)]; /* Safety net. */
510 struct {
511 int pid;
512 union {
513 int uid;
514 struct {
515 int utime, status, stime;
516 } child;
517 } procdata;
518 } procinfo;
519
520 unsigned long fault_addr;
521
522 struct {
523 int fd;
524 long band;
525 } fileinfo;
526
527 unsigned long sigval;
528 } stuff;
529 };
530
timespectojiffies(struct timespec * value)531 static inline unsigned long timespectojiffies(struct timespec *value)
532 {
533 unsigned long sec = (unsigned) value->tv_sec;
534 long nsec = value->tv_nsec;
535
536 if (sec > (LONG_MAX / HZ))
537 return LONG_MAX;
538 nsec += 1000000000L / HZ - 1;
539 nsec /= 1000000000L / HZ;
540 return HZ * sec + nsec;
541 }
542
irix_sigpoll_sys(unsigned long * set,struct irix5_siginfo * info,struct timespec * tp)543 asmlinkage int irix_sigpoll_sys(unsigned long *set, struct irix5_siginfo *info,
544 struct timespec *tp)
545 {
546 long expire = MAX_SCHEDULE_TIMEOUT;
547 sigset_t kset;
548 int i, sig, error, timeo = 0;
549
550 #ifdef DEBUG_SIG
551 printk("[%s:%d] irix_sigpoll_sys(%p,%p,%p)\n",
552 current->comm, current->pid, set, info, tp);
553 #endif
554
555 /* Must always specify the signal set. */
556 if(!set)
557 return -EINVAL;
558
559 error = verify_area(VERIFY_READ, set, sizeof(kset));
560 if (error)
561 goto out;
562
563 __copy_from_user(&kset, set, sizeof(set));
564 if (error)
565 goto out;
566
567 if (info && clear_user(info, sizeof(*info))) {
568 error = -EFAULT;
569 goto out;
570 }
571
572 if(tp) {
573 error = verify_area(VERIFY_READ, tp, sizeof(*tp));
574 if(error)
575 return error;
576 if(!tp->tv_sec && !tp->tv_nsec) {
577 error = -EINVAL;
578 goto out;
579 }
580 expire = timespectojiffies(tp)+(tp->tv_sec||tp->tv_nsec);
581 }
582
583 while(1) {
584 long tmp = 0;
585
586 current->state = TASK_INTERRUPTIBLE;
587 expire = schedule_timeout(expire);
588
589 for (i=0; i<=4; i++)
590 tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
591
592 if (tmp)
593 break;
594 if (!expire) {
595 timeo = 1;
596 break;
597 }
598 if (signal_pending(current))
599 return -EINTR;
600 }
601 if (timeo)
602 return -EAGAIN;
603
604 for(sig = 1; i <= 65 /* IRIX_NSIG */; sig++) {
605 if (sigismember (&kset, sig))
606 continue;
607 if (sigismember (¤t->pending.signal, sig)) {
608 /* XXX need more than this... */
609 if (info)
610 info->sig = sig;
611 error = 0;
612 goto out;
613 }
614 }
615
616 /* Should not get here, but do something sane if we do. */
617 error = -EINTR;
618
619 out:
620 return error;
621 }
622
623 /* This is here because of irix5_siginfo definition. */
624 #define P_PID 0
625 #define P_PGID 2
626 #define P_ALL 7
627
628 extern int getrusage(struct task_struct *, int, struct rusage *);
629
630 #define W_EXITED 1
631 #define W_TRAPPED 2
632 #define W_STOPPED 4
633 #define W_CONT 8
634 #define W_NOHANG 64
635
636 #define W_MASK (W_EXITED | W_TRAPPED | W_STOPPED | W_CONT | W_NOHANG)
637
irix_waitsys(int type,int pid,struct irix5_siginfo * info,int options,struct rusage * ru)638 asmlinkage int irix_waitsys(int type, int pid, struct irix5_siginfo *info,
639 int options, struct rusage *ru)
640 {
641 int flag, retval;
642 DECLARE_WAITQUEUE(wait, current);
643 struct task_struct *p;
644
645 if (!info) {
646 retval = -EINVAL;
647 goto out;
648 }
649 retval = verify_area(VERIFY_WRITE, info, sizeof(*info));
650 if(retval)
651 goto out;
652 if (ru) {
653 retval = verify_area(VERIFY_WRITE, ru, sizeof(*ru));
654 if(retval)
655 goto out;
656 }
657 if (options & ~(W_MASK)) {
658 retval = -EINVAL;
659 goto out;
660 }
661 if (type != P_PID && type != P_PGID && type != P_ALL) {
662 retval = -EINVAL;
663 goto out;
664 }
665 add_wait_queue(¤t->wait_chldexit, &wait);
666 repeat:
667 flag = 0;
668 current->state = TASK_INTERRUPTIBLE;
669 read_lock(&tasklist_lock);
670 for (p = current->p_cptr; p; p = p->p_osptr) {
671 if ((type == P_PID) && p->pid != pid)
672 continue;
673 if ((type == P_PGID) && p->pgrp != pid)
674 continue;
675 if ((p->exit_signal != SIGCHLD))
676 continue;
677 flag = 1;
678 switch (p->state) {
679 case TASK_STOPPED:
680 if (!p->exit_code)
681 continue;
682 if (!(options & (W_TRAPPED|W_STOPPED)) &&
683 !(p->ptrace & PT_PTRACED))
684 continue;
685 read_unlock(&tasklist_lock);
686 if (ru != NULL)
687 getrusage(p, RUSAGE_BOTH, ru);
688 __put_user(SIGCHLD, &info->sig);
689 __put_user(0, &info->code);
690 __put_user(p->pid, &info->stuff.procinfo.pid);
691 __put_user((p->exit_code >> 8) & 0xff,
692 &info->stuff.procinfo.procdata.child.status);
693 __put_user(p->times.tms_utime, &info->stuff.procinfo.procdata.child.utime);
694 __put_user(p->times.tms_stime, &info->stuff.procinfo.procdata.child.stime);
695 p->exit_code = 0;
696 retval = 0;
697 goto end_waitsys;
698 case TASK_ZOMBIE:
699 current->times.tms_cutime += p->times.tms_utime + p->times.tms_cutime;
700 current->times.tms_cstime += p->times.tms_stime + p->times.tms_cstime;
701 read_unlock(&tasklist_lock);
702 if (ru != NULL)
703 getrusage(p, RUSAGE_BOTH, ru);
704 __put_user(SIGCHLD, &info->sig);
705 __put_user(1, &info->code); /* CLD_EXITED */
706 __put_user(p->pid, &info->stuff.procinfo.pid);
707 __put_user((p->exit_code >> 8) & 0xff,
708 &info->stuff.procinfo.procdata.child.status);
709 __put_user(p->times.tms_utime,
710 &info->stuff.procinfo.procdata.child.utime);
711 __put_user(p->times.tms_stime,
712 &info->stuff.procinfo.procdata.child.stime);
713 retval = 0;
714 if (p->p_opptr != p->p_pptr) {
715 write_lock_irq(&tasklist_lock);
716 REMOVE_LINKS(p);
717 p->p_pptr = p->p_opptr;
718 SET_LINKS(p);
719 notify_parent(p, SIGCHLD);
720 write_unlock_irq(&tasklist_lock);
721 } else
722 release_task(p);
723 goto end_waitsys;
724 default:
725 continue;
726 }
727 }
728 read_unlock(&tasklist_lock);
729 if (flag) {
730 retval = 0;
731 if (options & W_NOHANG)
732 goto end_waitsys;
733 retval = -ERESTARTSYS;
734 if (signal_pending(current))
735 goto end_waitsys;
736 current->state = TASK_INTERRUPTIBLE;
737 schedule();
738 goto repeat;
739 }
740 retval = -ECHILD;
741 end_waitsys:
742 current->state = TASK_RUNNING;
743 remove_wait_queue(¤t->wait_chldexit, &wait);
744
745 out:
746 return retval;
747 }
748
749 struct irix5_context {
750 u32 flags;
751 u32 link;
752 u32 sigmask[4];
753 struct { u32 sp, size, flags; } stack;
754 int regs[36];
755 u32 fpregs[32];
756 u32 fpcsr;
757 u32 _unused0;
758 u32 _unused1[47];
759 u32 weird_graphics_thing;
760 };
761
irix_getcontext(struct pt_regs * regs)762 asmlinkage int irix_getcontext(struct pt_regs *regs)
763 {
764 int error, i, base = 0;
765 struct irix5_context *ctx;
766 unsigned long flags;
767
768 if (regs->regs[2] == 1000)
769 base = 1;
770 ctx = (struct irix5_context *) regs->regs[base + 4];
771
772 #ifdef DEBUG_SIG
773 printk("[%s:%d] irix_getcontext(%p)\n",
774 current->comm, current->pid, ctx);
775 #endif
776
777 error = verify_area(VERIFY_WRITE, ctx, sizeof(*ctx));
778 if(error)
779 goto out;
780 __put_user(current->thread.irix_oldctx, &ctx->link);
781
782 __copy_to_user(&ctx->sigmask, ¤t->blocked, sizeof(irix_sigset_t));
783
784 /* XXX Do sigstack stuff someday... */
785 __put_user(0, &ctx->stack.sp);
786 __put_user(0, &ctx->stack.size);
787 __put_user(0, &ctx->stack.flags);
788
789 __put_user(0, &ctx->weird_graphics_thing);
790 __put_user(0, &ctx->regs[0]);
791 for (i = 1; i < 32; i++)
792 __put_user(regs->regs[i], &ctx->regs[i]);
793 __put_user(regs->lo, &ctx->regs[32]);
794 __put_user(regs->hi, &ctx->regs[33]);
795 __put_user(regs->cp0_cause, &ctx->regs[34]);
796 __put_user(regs->cp0_epc, &ctx->regs[35]);
797
798 flags = 0x0f;
799 if(!current->used_math) {
800 flags &= ~(0x08);
801 } else {
802 /* XXX wheee... */
803 printk("Wheee, no code for saving IRIX FPU context yet.\n");
804 }
805 __put_user(flags, &ctx->flags);
806 error = 0;
807
808 out:
809 return error;
810 }
811
irix_setcontext(struct pt_regs * regs)812 asmlinkage unsigned long irix_setcontext(struct pt_regs *regs)
813 {
814 int error, base = 0;
815 struct irix5_context *ctx;
816
817 if(regs->regs[2] == 1000)
818 base = 1;
819 ctx = (struct irix5_context *) regs->regs[base + 4];
820
821 #ifdef DEBUG_SIG
822 printk("[%s:%d] irix_setcontext(%p)\n",
823 current->comm, current->pid, ctx);
824 #endif
825
826 error = verify_area(VERIFY_READ, ctx, sizeof(*ctx));
827 if (error)
828 goto out;
829
830 if (ctx->flags & 0x02) {
831 /* XXX sigstack garbage, todo... */
832 printk("Wheee, cannot do sigstack stuff in setcontext\n");
833 }
834
835 if (ctx->flags & 0x04) {
836 int i;
837
838 /* XXX extra control block stuff... todo... */
839 for(i = 1; i < 32; i++)
840 regs->regs[i] = ctx->regs[i];
841 regs->lo = ctx->regs[32];
842 regs->hi = ctx->regs[33];
843 regs->cp0_epc = ctx->regs[35];
844 }
845
846 if (ctx->flags & 0x08) {
847 /* XXX fpu context, blah... */
848 printk("Wheee, cannot restore FPU context yet...\n");
849 }
850 current->thread.irix_oldctx = ctx->link;
851 error = regs->regs[2];
852
853 out:
854 return error;
855 }
856
857 struct irix_sigstack { unsigned long sp; int status; };
858
irix_sigstack(struct irix_sigstack * new,struct irix_sigstack * old)859 asmlinkage int irix_sigstack(struct irix_sigstack *new, struct irix_sigstack *old)
860 {
861 int error;
862
863 #ifdef DEBUG_SIG
864 printk("[%s:%d] irix_sigstack(%p,%p)\n",
865 current->comm, current->pid, new, old);
866 #endif
867 if(new) {
868 error = verify_area(VERIFY_READ, new, sizeof(*new));
869 if(error)
870 goto out;
871 }
872
873 if(old) {
874 error = verify_area(VERIFY_WRITE, old, sizeof(*old));
875 if(error)
876 goto out;
877 }
878 error = 0;
879
880 out:
881 return error;
882 }
883
884 struct irix_sigaltstack { unsigned long sp; int size; int status; };
885
irix_sigaltstack(struct irix_sigaltstack * new,struct irix_sigaltstack * old)886 asmlinkage int irix_sigaltstack(struct irix_sigaltstack *new,
887 struct irix_sigaltstack *old)
888 {
889 int error;
890
891 #ifdef DEBUG_SIG
892 printk("[%s:%d] irix_sigaltstack(%p,%p)\n",
893 current->comm, current->pid, new, old);
894 #endif
895 if (new) {
896 error = verify_area(VERIFY_READ, new, sizeof(*new));
897 if(error)
898 goto out;
899 }
900
901 if (old) {
902 error = verify_area(VERIFY_WRITE, old, sizeof(*old));
903 if(error)
904 goto out;
905 }
906 error = 0;
907
908 out:
909 error = 0;
910
911 return error;
912 }
913
914 struct irix_procset {
915 int cmd, ltype, lid, rtype, rid;
916 };
917
irix_sigsendset(struct irix_procset * pset,int sig)918 asmlinkage int irix_sigsendset(struct irix_procset *pset, int sig)
919 {
920 int error;
921
922 error = verify_area(VERIFY_READ, pset, sizeof(*pset));
923 if(error)
924 goto out;
925 #ifdef DEBUG_SIG
926 printk("[%s:%d] irix_sigsendset([%d,%d,%d,%d,%d],%d)\n",
927 current->comm, current->pid,
928 pset->cmd, pset->ltype, pset->lid, pset->rtype, pset->rid,
929 sig);
930 #endif
931 error = -EINVAL;
932
933 out:
934 return error;
935 }
936