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-rw-r--r--arch/mips/kernel/irixsig.c853
1 files changed, 853 insertions, 0 deletions
diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c
new file mode 100644
index 000000000000..3f956f809fa4
--- /dev/null
+++ b/arch/mips/kernel/irixsig.c
@@ -0,0 +1,853 @@
1/*
2 * irixsig.c: WHEEE, IRIX signals! YOW, am I compatible 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#include <linux/ptrace.h>
16
17#include <asm/ptrace.h>
18#include <asm/uaccess.h>
19
20#undef DEBUG_SIG
21
22#define _S(nr) (1<<((nr)-1))
23
24#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
25
26typedef struct {
27 unsigned long sig[4];
28} irix_sigset_t;
29
30struct sigctx_irix5 {
31 u32 rmask, cp0_status;
32 u64 pc;
33 u64 regs[32];
34 u64 fpregs[32];
35 u32 usedfp, fpcsr, fpeir, sstk_flags;
36 u64 hi, lo;
37 u64 cp0_cause, cp0_badvaddr, _unused0;
38 irix_sigset_t sigset;
39 u64 weird_fpu_thing;
40 u64 _unused1[31];
41};
42
43#ifdef DEBUG_SIG
44/* Debugging */
45static inline void dump_irix5_sigctx(struct sigctx_irix5 *c)
46{
47 int i;
48
49 printk("misc: rmask[%08lx] status[%08lx] pc[%08lx]\n",
50 (unsigned long) c->rmask,
51 (unsigned long) c->cp0_status,
52 (unsigned long) c->pc);
53 printk("regs: ");
54 for(i = 0; i < 16; i++)
55 printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
56 printk("\nregs: ");
57 for(i = 16; i < 32; i++)
58 printk("[%d]<%08lx> ", i, (unsigned long) c->regs[i]);
59 printk("\nfpregs: ");
60 for(i = 0; i < 16; i++)
61 printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
62 printk("\nfpregs: ");
63 for(i = 16; i < 32; i++)
64 printk("[%d]<%08lx> ", i, (unsigned long) c->fpregs[i]);
65 printk("misc: usedfp[%d] fpcsr[%08lx] fpeir[%08lx] stk_flgs[%08lx]\n",
66 (int) c->usedfp, (unsigned long) c->fpcsr,
67 (unsigned long) c->fpeir, (unsigned long) c->sstk_flags);
68 printk("misc: hi[%08lx] lo[%08lx] cause[%08lx] badvaddr[%08lx]\n",
69 (unsigned long) c->hi, (unsigned long) c->lo,
70 (unsigned long) c->cp0_cause, (unsigned long) c->cp0_badvaddr);
71 printk("misc: sigset<0>[%08lx] sigset<1>[%08lx] sigset<2>[%08lx] "
72 "sigset<3>[%08lx]\n", (unsigned long) c->sigset.sig[0],
73 (unsigned long) c->sigset.sig[1],
74 (unsigned long) c->sigset.sig[2],
75 (unsigned long) c->sigset.sig[3]);
76}
77#endif
78
79static void setup_irix_frame(struct k_sigaction *ka, struct pt_regs *regs,
80 int signr, sigset_t *oldmask)
81{
82 unsigned long sp;
83 struct sigctx_irix5 *ctx;
84 int i;
85
86 sp = regs->regs[29];
87 sp -= sizeof(struct sigctx_irix5);
88 sp &= ~(0xf);
89 ctx = (struct sigctx_irix5 *) sp;
90 if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
91 goto segv_and_exit;
92
93 __put_user(0, &ctx->weird_fpu_thing);
94 __put_user(~(0x00000001), &ctx->rmask);
95 __put_user(0, &ctx->regs[0]);
96 for(i = 1; i < 32; i++)
97 __put_user((u64) regs->regs[i], &ctx->regs[i]);
98
99 __put_user((u64) regs->hi, &ctx->hi);
100 __put_user((u64) regs->lo, &ctx->lo);
101 __put_user((u64) regs->cp0_epc, &ctx->pc);
102 __put_user(!!used_math(), &ctx->usedfp);
103 __put_user((u64) regs->cp0_cause, &ctx->cp0_cause);
104 __put_user((u64) regs->cp0_badvaddr, &ctx->cp0_badvaddr);
105
106 __put_user(0, &ctx->sstk_flags); /* XXX sigstack unimp... todo... */
107
108 __copy_to_user(&ctx->sigset, oldmask, sizeof(irix_sigset_t));
109
110#ifdef DEBUG_SIG
111 dump_irix5_sigctx(ctx);
112#endif
113
114 regs->regs[4] = (unsigned long) signr;
115 regs->regs[5] = 0; /* XXX sigcode XXX */
116 regs->regs[6] = regs->regs[29] = sp;
117 regs->regs[7] = (unsigned long) ka->sa.sa_handler;
118 regs->regs[25] = regs->cp0_epc = (unsigned long) ka->sa_restorer;
119
120 return;
121
122segv_and_exit:
123 force_sigsegv(signr, current);
124}
125
126static void inline
127setup_irix_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
128 int signr, sigset_t *oldmask, siginfo_t *info)
129{
130 printk("Aiee: setup_tr_frame wants to be written");
131 do_exit(SIGSEGV);
132}
133
134static inline void handle_signal(unsigned long sig, siginfo_t *info,
135 struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs)
136{
137 switch(regs->regs[0]) {
138 case ERESTARTNOHAND:
139 regs->regs[2] = EINTR;
140 break;
141 case ERESTARTSYS:
142 if(!(ka->sa.sa_flags & SA_RESTART)) {
143 regs->regs[2] = EINTR;
144 break;
145 }
146 /* fallthrough */
147 case ERESTARTNOINTR: /* Userland will reload $v0. */
148 regs->cp0_epc -= 8;
149 }
150
151 regs->regs[0] = 0; /* Don't deal with this again. */
152
153 if (ka->sa.sa_flags & SA_SIGINFO)
154 setup_irix_rt_frame(ka, regs, sig, oldset, info);
155 else
156 setup_irix_frame(ka, regs, sig, oldset);
157
158 if (!(ka->sa.sa_flags & SA_NODEFER)) {
159 spin_lock_irq(&current->sighand->siglock);
160 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
161 sigaddset(&current->blocked,sig);
162 recalc_sigpending();
163 spin_unlock_irq(&current->sighand->siglock);
164 }
165}
166
167asmlinkage int do_irix_signal(sigset_t *oldset, struct pt_regs *regs)
168{
169 struct k_sigaction ka;
170 siginfo_t info;
171 int signr;
172
173 /*
174 * We want the common case to go fast, which is why we may in certain
175 * cases get here from kernel mode. Just return without doing anything
176 * if so.
177 */
178 if (!user_mode(regs))
179 return 1;
180
181 if (try_to_freeze(0))
182 goto no_signal;
183
184 if (!oldset)
185 oldset = &current->blocked;
186
187 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
188 if (signr > 0) {
189 handle_signal(signr, &info, &ka, oldset, regs);
190 return 1;
191 }
192
193no_signal:
194 /*
195 * Who's code doesn't conform to the restartable syscall convention
196 * dies here!!! The li instruction, a single machine instruction,
197 * must directly be followed by the syscall instruction.
198 */
199 if (regs->regs[0]) {
200 if (regs->regs[2] == ERESTARTNOHAND ||
201 regs->regs[2] == ERESTARTSYS ||
202 regs->regs[2] == ERESTARTNOINTR) {
203 regs->cp0_epc -= 8;
204 }
205 }
206 return 0;
207}
208
209asmlinkage void
210irix_sigreturn(struct pt_regs *regs)
211{
212 struct sigctx_irix5 *context, *magic;
213 unsigned long umask, mask;
214 u64 *fregs;
215 int sig, i, base = 0;
216 sigset_t blocked;
217
218 /* Always make any pending restarted system calls return -EINTR */
219 current_thread_info()->restart_block.fn = do_no_restart_syscall;
220
221 if (regs->regs[2] == 1000)
222 base = 1;
223
224 context = (struct sigctx_irix5 *) regs->regs[base + 4];
225 magic = (struct sigctx_irix5 *) regs->regs[base + 5];
226 sig = (int) regs->regs[base + 6];
227#ifdef DEBUG_SIG
228 printk("[%s:%d] IRIX sigreturn(scp[%p],ucp[%p],sig[%d])\n",
229 current->comm, current->pid, context, magic, sig);
230#endif
231 if (!context)
232 context = magic;
233 if (!access_ok(VERIFY_READ, context, sizeof(struct sigctx_irix5)))
234 goto badframe;
235
236#ifdef DEBUG_SIG
237 dump_irix5_sigctx(context);
238#endif
239
240 __get_user(regs->cp0_epc, &context->pc);
241 umask = context->rmask; mask = 2;
242 for (i = 1; i < 32; i++, mask <<= 1) {
243 if(umask & mask)
244 __get_user(regs->regs[i], &context->regs[i]);
245 }
246 __get_user(regs->hi, &context->hi);
247 __get_user(regs->lo, &context->lo);
248
249 if ((umask & 1) && context->usedfp) {
250 fregs = (u64 *) &current->thread.fpu;
251 for(i = 0; i < 32; i++)
252 fregs[i] = (u64) context->fpregs[i];
253 __get_user(current->thread.fpu.hard.fcr31, &context->fpcsr);
254 }
255
256 /* XXX do sigstack crapola here... XXX */
257
258 if (__copy_from_user(&blocked, &context->sigset, sizeof(blocked)))
259 goto badframe;
260
261 sigdelsetmask(&blocked, ~_BLOCKABLE);
262 spin_lock_irq(&current->sighand->siglock);
263 current->blocked = blocked;
264 recalc_sigpending();
265 spin_unlock_irq(&current->sighand->siglock);
266
267 /*
268 * Don't let your children do this ...
269 */
270 if (current_thread_info()->flags & TIF_SYSCALL_TRACE)
271 do_syscall_trace(regs, 1);
272 __asm__ __volatile__(
273 "move\t$29,%0\n\t"
274 "j\tsyscall_exit"
275 :/* no outputs */
276 :"r" (&regs));
277 /* Unreached */
278
279badframe:
280 force_sig(SIGSEGV, current);
281}
282
283struct sigact_irix5 {
284 int flags;
285 void (*handler)(int);
286 u32 sigset[4];
287 int _unused0[2];
288};
289
290#ifdef DEBUG_SIG
291static inline void dump_sigact_irix5(struct sigact_irix5 *p)
292{
293 printk("<f[%d] hndlr[%08lx] msk[%08lx]>", p->flags,
294 (unsigned long) p->handler,
295 (unsigned long) p->sigset[0]);
296}
297#endif
298
299asmlinkage int
300irix_sigaction(int sig, const struct sigaction *act,
301 struct sigaction *oact, void *trampoline)
302{
303 struct k_sigaction new_ka, old_ka;
304 int ret;
305
306#ifdef DEBUG_SIG
307 printk(" (%d,%s,%s,%08lx) ", sig, (!new ? "0" : "NEW"),
308 (!old ? "0" : "OLD"), trampoline);
309 if(new) {
310 dump_sigact_irix5(new); printk(" ");
311 }
312#endif
313 if (act) {
314 sigset_t mask;
315 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
316 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
317 __get_user(new_ka.sa.sa_flags, &act->sa_flags))
318 return -EFAULT;
319
320 __copy_from_user(&mask, &act->sa_mask, sizeof(sigset_t));
321
322 /*
323 * Hmmm... methinks IRIX libc always passes a valid trampoline
324 * value for all invocations of sigaction. Will have to
325 * investigate. POSIX POSIX, die die die...
326 */
327 new_ka.sa_restorer = trampoline;
328 }
329
330/* XXX Implement SIG_SETMASK32 for IRIX compatibility */
331 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
332
333 if (!ret && oact) {
334 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
335 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
336 __put_user(old_ka.sa.sa_flags, &oact->sa_flags))
337 return -EFAULT;
338 __copy_to_user(&old_ka.sa.sa_mask, &oact->sa_mask,
339 sizeof(sigset_t));
340 }
341
342 return ret;
343}
344
345asmlinkage int irix_sigpending(irix_sigset_t *set)
346{
347 return do_sigpending(set, sizeof(*set));
348}
349
350asmlinkage int irix_sigprocmask(int how, irix_sigset_t *new, irix_sigset_t *old)
351{
352 sigset_t oldbits, newbits;
353
354 if (new) {
355 if (!access_ok(VERIFY_READ, new, sizeof(*new)))
356 return -EFAULT;
357 __copy_from_user(&newbits, new, sizeof(unsigned long)*4);
358 sigdelsetmask(&newbits, ~_BLOCKABLE);
359
360 spin_lock_irq(&current->sighand->siglock);
361 oldbits = current->blocked;
362
363 switch(how) {
364 case 1:
365 sigorsets(&newbits, &oldbits, &newbits);
366 break;
367
368 case 2:
369 sigandsets(&newbits, &oldbits, &newbits);
370 break;
371
372 case 3:
373 break;
374
375 case 256:
376 siginitset(&newbits, newbits.sig[0]);
377 break;
378
379 default:
380 return -EINVAL;
381 }
382 recalc_sigpending();
383 spin_unlock_irq(&current->sighand->siglock);
384 }
385 if(old) {
386 if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
387 return -EFAULT;
388 __copy_to_user(old, &current->blocked, sizeof(unsigned long)*4);
389 }
390
391 return 0;
392}
393
394asmlinkage int irix_sigsuspend(struct pt_regs *regs)
395{
396 sigset_t *uset, saveset, newset;
397
398 uset = (sigset_t *) regs->regs[4];
399 if (copy_from_user(&newset, uset, sizeof(sigset_t)))
400 return -EFAULT;
401 sigdelsetmask(&newset, ~_BLOCKABLE);
402
403 spin_lock_irq(&current->sighand->siglock);
404 saveset = current->blocked;
405 current->blocked = newset;
406 recalc_sigpending();
407 spin_unlock_irq(&current->sighand->siglock);
408
409 regs->regs[2] = -EINTR;
410 while (1) {
411 current->state = TASK_INTERRUPTIBLE;
412 schedule();
413 if (do_irix_signal(&saveset, regs))
414 return -EINTR;
415 }
416}
417
418/* hate hate hate... */
419struct irix5_siginfo {
420 int sig, code, error;
421 union {
422 char unused[128 - (3 * 4)]; /* Safety net. */
423 struct {
424 int pid;
425 union {
426 int uid;
427 struct {
428 int utime, status, stime;
429 } child;
430 } procdata;
431 } procinfo;
432
433 unsigned long fault_addr;
434
435 struct {
436 int fd;
437 long band;
438 } fileinfo;
439
440 unsigned long sigval;
441 } stuff;
442};
443
444static inline unsigned long timespectojiffies(struct timespec *value)
445{
446 unsigned long sec = (unsigned) value->tv_sec;
447 long nsec = value->tv_nsec;
448
449 if (sec > (LONG_MAX / HZ))
450 return LONG_MAX;
451 nsec += 1000000000L / HZ - 1;
452 nsec /= 1000000000L / HZ;
453 return HZ * sec + nsec;
454}
455
456asmlinkage int irix_sigpoll_sys(unsigned long *set, struct irix5_siginfo *info,
457 struct timespec *tp)
458{
459 long expire = MAX_SCHEDULE_TIMEOUT;
460 sigset_t kset;
461 int i, sig, error, timeo = 0;
462
463#ifdef DEBUG_SIG
464 printk("[%s:%d] irix_sigpoll_sys(%p,%p,%p)\n",
465 current->comm, current->pid, set, info, tp);
466#endif
467
468 /* Must always specify the signal set. */
469 if (!set)
470 return -EINVAL;
471
472 if (!access_ok(VERIFY_READ, set, sizeof(kset))) {
473 error = -EFAULT;
474 goto out;
475 }
476
477 __copy_from_user(&kset, set, sizeof(set));
478 if (error)
479 goto out;
480
481 if (info && clear_user(info, sizeof(*info))) {
482 error = -EFAULT;
483 goto out;
484 }
485
486 if (tp) {
487 if (!access_ok(VERIFY_READ, tp, sizeof(*tp)))
488 return -EFAULT;
489 if (!tp->tv_sec && !tp->tv_nsec) {
490 error = -EINVAL;
491 goto out;
492 }
493 expire = timespectojiffies(tp)+(tp->tv_sec||tp->tv_nsec);
494 }
495
496 while(1) {
497 long tmp = 0;
498
499 current->state = TASK_INTERRUPTIBLE;
500 expire = schedule_timeout(expire);
501
502 for (i=0; i<=4; i++)
503 tmp |= (current->pending.signal.sig[i] & kset.sig[i]);
504
505 if (tmp)
506 break;
507 if (!expire) {
508 timeo = 1;
509 break;
510 }
511 if (signal_pending(current))
512 return -EINTR;
513 }
514 if (timeo)
515 return -EAGAIN;
516
517 for(sig = 1; i <= 65 /* IRIX_NSIG */; sig++) {
518 if (sigismember (&kset, sig))
519 continue;
520 if (sigismember (&current->pending.signal, sig)) {
521 /* XXX need more than this... */
522 if (info)
523 info->sig = sig;
524 error = 0;
525 goto out;
526 }
527 }
528
529 /* Should not get here, but do something sane if we do. */
530 error = -EINTR;
531
532out:
533 return error;
534}
535
536/* This is here because of irix5_siginfo definition. */
537#define IRIX_P_PID 0
538#define IRIX_P_PGID 2
539#define IRIX_P_ALL 7
540
541extern int getrusage(struct task_struct *, int, struct rusage __user *);
542
543#define W_EXITED 1
544#define W_TRAPPED 2
545#define W_STOPPED 4
546#define W_CONT 8
547#define W_NOHANG 64
548
549#define W_MASK (W_EXITED | W_TRAPPED | W_STOPPED | W_CONT | W_NOHANG)
550
551asmlinkage int irix_waitsys(int type, int pid, struct irix5_siginfo *info,
552 int options, struct rusage *ru)
553{
554 int flag, retval;
555 DECLARE_WAITQUEUE(wait, current);
556 struct task_struct *tsk;
557 struct task_struct *p;
558 struct list_head *_p;
559
560 if (!info) {
561 retval = -EINVAL;
562 goto out;
563 }
564 if (!access_ok(VERIFY_WRITE, info, sizeof(*info))) {
565 retval = -EFAULT;
566 goto out;
567 }
568 if (ru) {
569 if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru))) {
570 retval = -EFAULT;
571 goto out;
572 }
573 }
574 if (options & ~(W_MASK)) {
575 retval = -EINVAL;
576 goto out;
577 }
578 if (type != IRIX_P_PID && type != IRIX_P_PGID && type != IRIX_P_ALL) {
579 retval = -EINVAL;
580 goto out;
581 }
582 add_wait_queue(&current->signal->wait_chldexit, &wait);
583repeat:
584 flag = 0;
585 current->state = TASK_INTERRUPTIBLE;
586 read_lock(&tasklist_lock);
587 tsk = current;
588 list_for_each(_p,&tsk->children) {
589 p = list_entry(_p,struct task_struct,sibling);
590 if ((type == IRIX_P_PID) && p->pid != pid)
591 continue;
592 if ((type == IRIX_P_PGID) && process_group(p) != pid)
593 continue;
594 if ((p->exit_signal != SIGCHLD))
595 continue;
596 flag = 1;
597 switch (p->state) {
598 case TASK_STOPPED:
599 if (!p->exit_code)
600 continue;
601 if (!(options & (W_TRAPPED|W_STOPPED)) &&
602 !(p->ptrace & PT_PTRACED))
603 continue;
604 read_unlock(&tasklist_lock);
605
606 /* move to end of parent's list to avoid starvation */
607 write_lock_irq(&tasklist_lock);
608 remove_parent(p);
609 add_parent(p, p->parent);
610 write_unlock_irq(&tasklist_lock);
611 retval = ru ? getrusage(p, RUSAGE_BOTH, ru) : 0;
612 if (!retval && ru) {
613 retval |= __put_user(SIGCHLD, &info->sig);
614 retval |= __put_user(0, &info->code);
615 retval |= __put_user(p->pid, &info->stuff.procinfo.pid);
616 retval |= __put_user((p->exit_code >> 8) & 0xff,
617 &info->stuff.procinfo.procdata.child.status);
618 retval |= __put_user(p->utime, &info->stuff.procinfo.procdata.child.utime);
619 retval |= __put_user(p->stime, &info->stuff.procinfo.procdata.child.stime);
620 }
621 if (!retval) {
622 p->exit_code = 0;
623 }
624 goto end_waitsys;
625
626 case EXIT_ZOMBIE:
627 current->signal->cutime += p->utime + p->signal->cutime;
628 current->signal->cstime += p->stime + p->signal->cstime;
629 if (ru != NULL)
630 getrusage(p, RUSAGE_BOTH, ru);
631 __put_user(SIGCHLD, &info->sig);
632 __put_user(1, &info->code); /* CLD_EXITED */
633 __put_user(p->pid, &info->stuff.procinfo.pid);
634 __put_user((p->exit_code >> 8) & 0xff,
635 &info->stuff.procinfo.procdata.child.status);
636 __put_user(p->utime,
637 &info->stuff.procinfo.procdata.child.utime);
638 __put_user(p->stime,
639 &info->stuff.procinfo.procdata.child.stime);
640 retval = 0;
641 if (p->real_parent != p->parent) {
642 write_lock_irq(&tasklist_lock);
643 remove_parent(p);
644 p->parent = p->real_parent;
645 add_parent(p, p->parent);
646 do_notify_parent(p, SIGCHLD);
647 write_unlock_irq(&tasklist_lock);
648 } else
649 release_task(p);
650 goto end_waitsys;
651 default:
652 continue;
653 }
654 tsk = next_thread(tsk);
655 }
656 read_unlock(&tasklist_lock);
657 if (flag) {
658 retval = 0;
659 if (options & W_NOHANG)
660 goto end_waitsys;
661 retval = -ERESTARTSYS;
662 if (signal_pending(current))
663 goto end_waitsys;
664 current->state = TASK_INTERRUPTIBLE;
665 schedule();
666 goto repeat;
667 }
668 retval = -ECHILD;
669end_waitsys:
670 current->state = TASK_RUNNING;
671 remove_wait_queue(&current->signal->wait_chldexit, &wait);
672
673out:
674 return retval;
675}
676
677struct irix5_context {
678 u32 flags;
679 u32 link;
680 u32 sigmask[4];
681 struct { u32 sp, size, flags; } stack;
682 int regs[36];
683 u32 fpregs[32];
684 u32 fpcsr;
685 u32 _unused0;
686 u32 _unused1[47];
687 u32 weird_graphics_thing;
688};
689
690asmlinkage int irix_getcontext(struct pt_regs *regs)
691{
692 int i, base = 0;
693 struct irix5_context *ctx;
694 unsigned long flags;
695
696 if (regs->regs[2] == 1000)
697 base = 1;
698 ctx = (struct irix5_context *) regs->regs[base + 4];
699
700#ifdef DEBUG_SIG
701 printk("[%s:%d] irix_getcontext(%p)\n",
702 current->comm, current->pid, ctx);
703#endif
704
705 if (!access_ok(VERIFY_WRITE, ctx, sizeof(*ctx)))
706 return -EFAULT;
707
708 __put_user(current->thread.irix_oldctx, &ctx->link);
709
710 __copy_to_user(&ctx->sigmask, &current->blocked, sizeof(irix_sigset_t));
711
712 /* XXX Do sigstack stuff someday... */
713 __put_user(0, &ctx->stack.sp);
714 __put_user(0, &ctx->stack.size);
715 __put_user(0, &ctx->stack.flags);
716
717 __put_user(0, &ctx->weird_graphics_thing);
718 __put_user(0, &ctx->regs[0]);
719 for (i = 1; i < 32; i++)
720 __put_user(regs->regs[i], &ctx->regs[i]);
721 __put_user(regs->lo, &ctx->regs[32]);
722 __put_user(regs->hi, &ctx->regs[33]);
723 __put_user(regs->cp0_cause, &ctx->regs[34]);
724 __put_user(regs->cp0_epc, &ctx->regs[35]);
725
726 flags = 0x0f;
727 if (!used_math()) {
728 flags &= ~(0x08);
729 } else {
730 /* XXX wheee... */
731 printk("Wheee, no code for saving IRIX FPU context yet.\n");
732 }
733 __put_user(flags, &ctx->flags);
734
735 return 0;
736}
737
738asmlinkage unsigned long irix_setcontext(struct pt_regs *regs)
739{
740 int error, base = 0;
741 struct irix5_context *ctx;
742
743 if(regs->regs[2] == 1000)
744 base = 1;
745 ctx = (struct irix5_context *) regs->regs[base + 4];
746
747#ifdef DEBUG_SIG
748 printk("[%s:%d] irix_setcontext(%p)\n",
749 current->comm, current->pid, ctx);
750#endif
751
752 if (!access_ok(VERIFY_READ, ctx, sizeof(*ctx))) {
753 error = -EFAULT;
754 goto out;
755 }
756
757 if (ctx->flags & 0x02) {
758 /* XXX sigstack garbage, todo... */
759 printk("Wheee, cannot do sigstack stuff in setcontext\n");
760 }
761
762 if (ctx->flags & 0x04) {
763 int i;
764
765 /* XXX extra control block stuff... todo... */
766 for(i = 1; i < 32; i++)
767 regs->regs[i] = ctx->regs[i];
768 regs->lo = ctx->regs[32];
769 regs->hi = ctx->regs[33];
770 regs->cp0_epc = ctx->regs[35];
771 }
772
773 if (ctx->flags & 0x08) {
774 /* XXX fpu context, blah... */
775 printk("Wheee, cannot restore FPU context yet...\n");
776 }
777 current->thread.irix_oldctx = ctx->link;
778 error = regs->regs[2];
779
780out:
781 return error;
782}
783
784struct irix_sigstack { unsigned long sp; int status; };
785
786asmlinkage int irix_sigstack(struct irix_sigstack *new, struct irix_sigstack *old)
787{
788 int error = -EFAULT;
789
790#ifdef DEBUG_SIG
791 printk("[%s:%d] irix_sigstack(%p,%p)\n",
792 current->comm, current->pid, new, old);
793#endif
794 if(new) {
795 if (!access_ok(VERIFY_READ, new, sizeof(*new)))
796 goto out;
797 }
798
799 if(old) {
800 if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
801 goto out;
802 }
803 error = 0;
804
805out:
806 return error;
807}
808
809struct irix_sigaltstack { unsigned long sp; int size; int status; };
810
811asmlinkage int irix_sigaltstack(struct irix_sigaltstack *new,
812 struct irix_sigaltstack *old)
813{
814 int error = -EFAULT;
815
816#ifdef DEBUG_SIG
817 printk("[%s:%d] irix_sigaltstack(%p,%p)\n",
818 current->comm, current->pid, new, old);
819#endif
820 if (new) {
821 if (!access_ok(VERIFY_READ, new, sizeof(*new)))
822 goto out;
823 }
824
825 if (old) {
826 if (!access_ok(VERIFY_WRITE, old, sizeof(*old)))
827 goto out;
828 }
829 error = 0;
830
831out:
832 error = 0;
833
834 return error;
835}
836
837struct irix_procset {
838 int cmd, ltype, lid, rtype, rid;
839};
840
841asmlinkage int irix_sigsendset(struct irix_procset *pset, int sig)
842{
843 if (!access_ok(VERIFY_READ, pset, sizeof(*pset)))
844 return -EFAULT;
845
846#ifdef DEBUG_SIG
847 printk("[%s:%d] irix_sigsendset([%d,%d,%d,%d,%d],%d)\n",
848 current->comm, current->pid,
849 pset->cmd, pset->ltype, pset->lid, pset->rtype, pset->rid,
850 sig);
851#endif
852 return -EINVAL;
853}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-04 03:52:23 -0500