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10#include <linux/cache.h>
11#include <linux/compat.h>
12#include <linux/sched.h>
13#include <linux/mm.h>
14#include <linux/smp.h>
15#include <linux/kernel.h>
16#include <linux/signal.h>
17#include <linux/syscalls.h>
18#include <linux/errno.h>
19#include <linux/wait.h>
20#include <linux/ptrace.h>
21#include <linux/suspend.h>
22#include <linux/compiler.h>
23#include <linux/uaccess.h>
24
25#include <asm/abi.h>
26#include <asm/asm.h>
27#include <asm/compat-signal.h>
28#include <linux/bitops.h>
29#include <asm/cacheflush.h>
30#include <asm/sim.h>
31#include <asm/ucontext.h>
32#include <asm/system.h>
33#include <asm/fpu.h>
34#include <asm/war.h>
35
36#include "signal-common.h"
37
38
39
40
41#define __NR_O32_sigreturn 4119
42#define __NR_O32_rt_sigreturn 4193
43#define __NR_O32_restart_syscall 4253
44
45
46
47typedef unsigned int __sighandler32_t;
48typedef void (*vfptr_t)(void);
49
50struct sigaction32 {
51 unsigned int sa_flags;
52 __sighandler32_t sa_handler;
53 compat_sigset_t sa_mask;
54};
55
56
57typedef struct sigaltstack32 {
58 s32 ss_sp;
59 compat_size_t ss_size;
60 int ss_flags;
61} stack32_t;
62
63struct ucontext32 {
64 u32 uc_flags;
65 s32 uc_link;
66 stack32_t uc_stack;
67 struct sigcontext32 uc_mcontext;
68 compat_sigset_t uc_sigmask;
69};
70
71
72
73
74
75
76#if ICACHE_REFILLS_WORKAROUND_WAR == 0
77
78struct sigframe32 {
79 u32 sf_ass[4];
80 u32 sf_code[2];
81 struct sigcontext32 sf_sc;
82 compat_sigset_t sf_mask;
83};
84
85struct rt_sigframe32 {
86 u32 rs_ass[4];
87 u32 rs_code[2];
88 compat_siginfo_t rs_info;
89 struct ucontext32 rs_uc;
90};
91
92#else
93
94struct sigframe32 {
95 u32 sf_ass[4];
96 u32 sf_pad[2];
97 struct sigcontext32 sf_sc;
98 compat_sigset_t sf_mask;
99 u32 sf_code[8] ____cacheline_aligned;
100};
101
102struct rt_sigframe32 {
103 u32 rs_ass[4];
104 u32 rs_pad[2];
105 compat_siginfo_t rs_info;
106 struct ucontext32 rs_uc;
107 u32 rs_code[8] __attribute__((aligned(32)));
108};
109
110#endif
111
112
113
114
115static int protected_save_fp_context32(struct sigcontext32 __user *sc)
116{
117 int err;
118 while (1) {
119 lock_fpu_owner();
120 own_fpu_inatomic(1);
121 err = save_fp_context32(sc);
122 unlock_fpu_owner();
123 if (likely(!err))
124 break;
125
126 err = __put_user(0, &sc->sc_fpregs[0]) |
127 __put_user(0, &sc->sc_fpregs[31]) |
128 __put_user(0, &sc->sc_fpc_csr);
129 if (err)
130 break;
131 }
132 return err;
133}
134
135static int protected_restore_fp_context32(struct sigcontext32 __user *sc)
136{
137 int err, tmp;
138 while (1) {
139 lock_fpu_owner();
140 own_fpu_inatomic(0);
141 err = restore_fp_context32(sc);
142 unlock_fpu_owner();
143 if (likely(!err))
144 break;
145
146 err = __get_user(tmp, &sc->sc_fpregs[0]) |
147 __get_user(tmp, &sc->sc_fpregs[31]) |
148 __get_user(tmp, &sc->sc_fpc_csr);
149 if (err)
150 break;
151 }
152 return err;
153}
154
155static int setup_sigcontext32(struct pt_regs *regs,
156 struct sigcontext32 __user *sc)
157{
158 int err = 0;
159 int i;
160 u32 used_math;
161
162 err |= __put_user(regs->cp0_epc, &sc->sc_pc);
163
164 err |= __put_user(0, &sc->sc_regs[0]);
165 for (i = 1; i < 32; i++)
166 err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
167
168 err |= __put_user(regs->hi, &sc->sc_mdhi);
169 err |= __put_user(regs->lo, &sc->sc_mdlo);
170 if (cpu_has_dsp) {
171 err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
172 err |= __put_user(mfhi1(), &sc->sc_hi1);
173 err |= __put_user(mflo1(), &sc->sc_lo1);
174 err |= __put_user(mfhi2(), &sc->sc_hi2);
175 err |= __put_user(mflo2(), &sc->sc_lo2);
176 err |= __put_user(mfhi3(), &sc->sc_hi3);
177 err |= __put_user(mflo3(), &sc->sc_lo3);
178 }
179
180 used_math = !!used_math();
181 err |= __put_user(used_math, &sc->sc_used_math);
182
183 if (used_math) {
184
185
186
187
188 err |= protected_save_fp_context32(sc);
189 }
190 return err;
191}
192
193static int
194check_and_restore_fp_context32(struct sigcontext32 __user *sc)
195{
196 int err, sig;
197
198 err = sig = fpcsr_pending(&sc->sc_fpc_csr);
199 if (err > 0)
200 err = 0;
201 err |= protected_restore_fp_context32(sc);
202 return err ?: sig;
203}
204
205static int restore_sigcontext32(struct pt_regs *regs,
206 struct sigcontext32 __user *sc)
207{
208 u32 used_math;
209 int err = 0;
210 s32 treg;
211 int i;
212
213
214 current_thread_info()->restart_block.fn = do_no_restart_syscall;
215
216 err |= __get_user(regs->cp0_epc, &sc->sc_pc);
217 err |= __get_user(regs->hi, &sc->sc_mdhi);
218 err |= __get_user(regs->lo, &sc->sc_mdlo);
219 if (cpu_has_dsp) {
220 err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
221 err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
222 err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
223 err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
224 err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
225 err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
226 err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
227 }
228
229 for (i = 1; i < 32; i++)
230 err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
231
232 err |= __get_user(used_math, &sc->sc_used_math);
233 conditional_used_math(used_math);
234
235 if (used_math) {
236
237 if (!err)
238 err = check_and_restore_fp_context32(sc);
239 } else {
240
241 lose_fpu(0);
242 }
243
244 return err;
245}
246
247
248
249
250extern void __put_sigset_unknown_nsig(void);
251extern void __get_sigset_unknown_nsig(void);
252
253static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t __user *ubuf)
254{
255 int err = 0;
256
257 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)))
258 return -EFAULT;
259
260 switch (_NSIG_WORDS) {
261 default:
262 __put_sigset_unknown_nsig();
263 case 2:
264 err |= __put_user(kbuf->sig[1] >> 32, &ubuf->sig[3]);
265 err |= __put_user(kbuf->sig[1] & 0xffffffff, &ubuf->sig[2]);
266 case 1:
267 err |= __put_user(kbuf->sig[0] >> 32, &ubuf->sig[1]);
268 err |= __put_user(kbuf->sig[0] & 0xffffffff, &ubuf->sig[0]);
269 }
270
271 return err;
272}
273
274static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf)
275{
276 int err = 0;
277 unsigned long sig[4];
278
279 if (!access_ok(VERIFY_READ, ubuf, sizeof(*ubuf)))
280 return -EFAULT;
281
282 switch (_NSIG_WORDS) {
283 default:
284 __get_sigset_unknown_nsig();
285 case 2:
286 err |= __get_user(sig[3], &ubuf->sig[3]);
287 err |= __get_user(sig[2], &ubuf->sig[2]);
288 kbuf->sig[1] = sig[2] | (sig[3] << 32);
289 case 1:
290 err |= __get_user(sig[1], &ubuf->sig[1]);
291 err |= __get_user(sig[0], &ubuf->sig[0]);
292 kbuf->sig[0] = sig[0] | (sig[1] << 32);
293 }
294
295 return err;
296}
297
298
299
300
301
302asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
303{
304 compat_sigset_t __user *uset;
305 sigset_t newset;
306
307 uset = (compat_sigset_t __user *) regs.regs[4];
308 if (get_sigset(&newset, uset))
309 return -EFAULT;
310 sigdelsetmask(&newset, ~_BLOCKABLE);
311
312 spin_lock_irq(¤t->sighand->siglock);
313 current->saved_sigmask = current->blocked;
314 current->blocked = newset;
315 recalc_sigpending();
316 spin_unlock_irq(¤t->sighand->siglock);
317
318 current->state = TASK_INTERRUPTIBLE;
319 schedule();
320 set_thread_flag(TIF_RESTORE_SIGMASK);
321 return -ERESTARTNOHAND;
322}
323
324asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
325{
326 compat_sigset_t __user *uset;
327 sigset_t newset;
328 size_t sigsetsize;
329
330
331 sigsetsize = regs.regs[5];
332 if (sigsetsize != sizeof(compat_sigset_t))
333 return -EINVAL;
334
335 uset = (compat_sigset_t __user *) regs.regs[4];
336 if (get_sigset(&newset, uset))
337 return -EFAULT;
338 sigdelsetmask(&newset, ~_BLOCKABLE);
339
340 spin_lock_irq(¤t->sighand->siglock);
341 current->saved_sigmask = current->blocked;
342 current->blocked = newset;
343 recalc_sigpending();
344 spin_unlock_irq(¤t->sighand->siglock);
345
346 current->state = TASK_INTERRUPTIBLE;
347 schedule();
348 set_thread_flag(TIF_RESTORE_SIGMASK);
349 return -ERESTARTNOHAND;
350}
351
352asmlinkage int sys32_sigaction(int sig, const struct sigaction32 __user *act,
353 struct sigaction32 __user *oact)
354{
355 struct k_sigaction new_ka, old_ka;
356 int ret;
357 int err = 0;
358
359 if (act) {
360 old_sigset_t mask;
361 s32 handler;
362
363 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
364 return -EFAULT;
365 err |= __get_user(handler, &act->sa_handler);
366 new_ka.sa.sa_handler = (void __user *)(s64)handler;
367 err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
368 err |= __get_user(mask, &act->sa_mask.sig[0]);
369 if (err)
370 return -EFAULT;
371
372 siginitset(&new_ka.sa.sa_mask, mask);
373 }
374
375 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
376
377 if (!ret && oact) {
378 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
379 return -EFAULT;
380 err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
381 err |= __put_user((u32)(u64)old_ka.sa.sa_handler,
382 &oact->sa_handler);
383 err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig);
384 err |= __put_user(0, &oact->sa_mask.sig[1]);
385 err |= __put_user(0, &oact->sa_mask.sig[2]);
386 err |= __put_user(0, &oact->sa_mask.sig[3]);
387 if (err)
388 return -EFAULT;
389 }
390
391 return ret;
392}
393
394asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
395{
396 const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
397 stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
398 unsigned long usp = regs.regs[29];
399 stack_t kss, koss;
400 int ret, err = 0;
401 mm_segment_t old_fs = get_fs();
402 s32 sp;
403
404 if (uss) {
405 if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
406 return -EFAULT;
407 err |= __get_user(sp, &uss->ss_sp);
408 kss.ss_sp = (void __user *) (long) sp;
409 err |= __get_user(kss.ss_size, &uss->ss_size);
410 err |= __get_user(kss.ss_flags, &uss->ss_flags);
411 if (err)
412 return -EFAULT;
413 }
414
415 set_fs(KERNEL_DS);
416 ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
417 uoss ? (stack_t __user *)&koss : NULL, usp);
418 set_fs(old_fs);
419
420 if (!ret && uoss) {
421 if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
422 return -EFAULT;
423 sp = (int) (unsigned long) koss.ss_sp;
424 err |= __put_user(sp, &uoss->ss_sp);
425 err |= __put_user(koss.ss_size, &uoss->ss_size);
426 err |= __put_user(koss.ss_flags, &uoss->ss_flags);
427 if (err)
428 return -EFAULT;
429 }
430 return ret;
431}
432
433int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
434{
435 int err;
436
437 if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
438 return -EFAULT;
439
440
441
442
443
444
445
446
447 err = __put_user(from->si_signo, &to->si_signo);
448 err |= __put_user(from->si_errno, &to->si_errno);
449 err |= __put_user((short)from->si_code, &to->si_code);
450 if (from->si_code < 0)
451 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
452 else {
453 switch (from->si_code >> 16) {
454 case __SI_TIMER >> 16:
455 err |= __put_user(from->si_tid, &to->si_tid);
456 err |= __put_user(from->si_overrun, &to->si_overrun);
457 err |= __put_user(from->si_int, &to->si_int);
458 break;
459 case __SI_CHLD >> 16:
460 err |= __put_user(from->si_utime, &to->si_utime);
461 err |= __put_user(from->si_stime, &to->si_stime);
462 err |= __put_user(from->si_status, &to->si_status);
463 default:
464 err |= __put_user(from->si_pid, &to->si_pid);
465 err |= __put_user(from->si_uid, &to->si_uid);
466 break;
467 case __SI_FAULT >> 16:
468 err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
469 break;
470 case __SI_POLL >> 16:
471 err |= __put_user(from->si_band, &to->si_band);
472 err |= __put_user(from->si_fd, &to->si_fd);
473 break;
474 case __SI_RT >> 16:
475 case __SI_MESGQ >> 16:
476 err |= __put_user(from->si_pid, &to->si_pid);
477 err |= __put_user(from->si_uid, &to->si_uid);
478 err |= __put_user(from->si_int, &to->si_int);
479 break;
480 }
481 }
482 return err;
483}
484
485asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
486{
487 struct sigframe32 __user *frame;
488 sigset_t blocked;
489 int sig;
490
491 frame = (struct sigframe32 __user *) regs.regs[29];
492 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
493 goto badframe;
494 if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
495 goto badframe;
496
497 sigdelsetmask(&blocked, ~_BLOCKABLE);
498 spin_lock_irq(¤t->sighand->siglock);
499 current->blocked = blocked;
500 recalc_sigpending();
501 spin_unlock_irq(¤t->sighand->siglock);
502
503 sig = restore_sigcontext32(®s, &frame->sf_sc);
504 if (sig < 0)
505 goto badframe;
506 else if (sig)
507 force_sig(sig, current);
508
509
510
511
512 __asm__ __volatile__(
513 "move\t$29, %0\n\t"
514 "j\tsyscall_exit"
515 :
516 :"r" (®s));
517
518
519badframe:
520 force_sig(SIGSEGV, current);
521}
522
523asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
524{
525 struct rt_sigframe32 __user *frame;
526 mm_segment_t old_fs;
527 sigset_t set;
528 stack_t st;
529 s32 sp;
530 int sig;
531
532 frame = (struct rt_sigframe32 __user *) regs.regs[29];
533 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
534 goto badframe;
535 if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
536 goto badframe;
537
538 sigdelsetmask(&set, ~_BLOCKABLE);
539 spin_lock_irq(¤t->sighand->siglock);
540 current->blocked = set;
541 recalc_sigpending();
542 spin_unlock_irq(¤t->sighand->siglock);
543
544 sig = restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext);
545 if (sig < 0)
546 goto badframe;
547 else if (sig)
548 force_sig(sig, current);
549
550
551 if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
552 goto badframe;
553 st.ss_sp = (void __user *)(long) sp;
554 if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
555 goto badframe;
556 if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
557 goto badframe;
558
559
560
561 old_fs = get_fs();
562 set_fs(KERNEL_DS);
563 do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
564 set_fs(old_fs);
565
566
567
568
569 __asm__ __volatile__(
570 "move\t$29, %0\n\t"
571 "j\tsyscall_exit"
572 :
573 :"r" (®s));
574
575
576badframe:
577 force_sig(SIGSEGV, current);
578}
579
580static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
581 int signr, sigset_t *set)
582{
583 struct sigframe32 __user *frame;
584 int err = 0;
585
586 frame = get_sigframe(ka, regs, sizeof(*frame));
587 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
588 goto give_sigsegv;
589
590 err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn);
591
592 err |= setup_sigcontext32(regs, &frame->sf_sc);
593 err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
594
595 if (err)
596 goto give_sigsegv;
597
598
599
600
601
602
603
604
605
606
607
608 regs->regs[ 4] = signr;
609 regs->regs[ 5] = 0;
610 regs->regs[ 6] = (unsigned long) &frame->sf_sc;
611 regs->regs[29] = (unsigned long) frame;
612 regs->regs[31] = (unsigned long) frame->sf_code;
613 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
614
615 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
616 current->comm, current->pid,
617 frame, regs->cp0_epc, regs->regs[31]);
618
619 return 0;
620
621give_sigsegv:
622 force_sigsegv(signr, current);
623 return -EFAULT;
624}
625
626static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
627 int signr, sigset_t *set, siginfo_t *info)
628{
629 struct rt_sigframe32 __user *frame;
630 int err = 0;
631 s32 sp;
632
633 frame = get_sigframe(ka, regs, sizeof(*frame));
634 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
635 goto give_sigsegv;
636
637 err |= install_sigtramp(frame->rs_code, __NR_O32_rt_sigreturn);
638
639
640 err |= copy_siginfo_to_user32(&frame->rs_info, info);
641
642
643 err |= __put_user(0, &frame->rs_uc.uc_flags);
644 err |= __put_user(0, &frame->rs_uc.uc_link);
645 sp = (int) (long) current->sas_ss_sp;
646 err |= __put_user(sp,
647 &frame->rs_uc.uc_stack.ss_sp);
648 err |= __put_user(sas_ss_flags(regs->regs[29]),
649 &frame->rs_uc.uc_stack.ss_flags);
650 err |= __put_user(current->sas_ss_size,
651 &frame->rs_uc.uc_stack.ss_size);
652 err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
653 err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
654
655 if (err)
656 goto give_sigsegv;
657
658
659
660
661
662
663
664
665
666
667
668 regs->regs[ 4] = signr;
669 regs->regs[ 5] = (unsigned long) &frame->rs_info;
670 regs->regs[ 6] = (unsigned long) &frame->rs_uc;
671 regs->regs[29] = (unsigned long) frame;
672 regs->regs[31] = (unsigned long) frame->rs_code;
673 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
674
675 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
676 current->comm, current->pid,
677 frame, regs->cp0_epc, regs->regs[31]);
678
679 return 0;
680
681give_sigsegv:
682 force_sigsegv(signr, current);
683 return -EFAULT;
684}
685
686
687
688
689struct mips_abi mips_abi_32 = {
690 .setup_frame = setup_frame_32,
691 .setup_rt_frame = setup_rt_frame_32,
692 .restart = __NR_O32_restart_syscall
693};
694
695asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
696 struct sigaction32 __user *oact,
697 unsigned int sigsetsize)
698{
699 struct k_sigaction new_sa, old_sa;
700 int ret = -EINVAL;
701
702
703 if (sigsetsize != sizeof(sigset_t))
704 goto out;
705
706 if (act) {
707 s32 handler;
708 int err = 0;
709
710 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
711 return -EFAULT;
712 err |= __get_user(handler, &act->sa_handler);
713 new_sa.sa.sa_handler = (void __user *)(s64)handler;
714 err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
715 err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
716 if (err)
717 return -EFAULT;
718 }
719
720 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
721
722 if (!ret && oact) {
723 int err = 0;
724
725 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
726 return -EFAULT;
727
728 err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
729 &oact->sa_handler);
730 err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
731 err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
732 if (err)
733 return -EFAULT;
734 }
735out:
736 return ret;
737}
738
739asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
740 compat_sigset_t __user *oset, unsigned int sigsetsize)
741{
742 sigset_t old_set, new_set;
743 int ret;
744 mm_segment_t old_fs = get_fs();
745
746 if (set && get_sigset(&new_set, set))
747 return -EFAULT;
748
749 set_fs(KERNEL_DS);
750 ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
751 oset ? (sigset_t __user *)&old_set : NULL,
752 sigsetsize);
753 set_fs(old_fs);
754
755 if (!ret && oset && put_sigset(&old_set, oset))
756 return -EFAULT;
757
758 return ret;
759}
760
761asmlinkage int sys32_rt_sigpending(compat_sigset_t __user *uset,
762 unsigned int sigsetsize)
763{
764 int ret;
765 sigset_t set;
766 mm_segment_t old_fs = get_fs();
767
768 set_fs(KERNEL_DS);
769 ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
770 set_fs(old_fs);
771
772 if (!ret && put_sigset(&set, uset))
773 return -EFAULT;
774
775 return ret;
776}
777
778asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
779{
780 siginfo_t info;
781 int ret;
782 mm_segment_t old_fs = get_fs();
783
784 if (copy_from_user(&info, uinfo, 3*sizeof(int)) ||
785 copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
786 return -EFAULT;
787 set_fs(KERNEL_DS);
788 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
789 set_fs(old_fs);
790 return ret;
791}
792
793asmlinkage long
794sys32_waitid(int which, compat_pid_t pid,
795 compat_siginfo_t __user *uinfo, int options,
796 struct compat_rusage __user *uru)
797{
798 siginfo_t info;
799 struct rusage ru;
800 long ret;
801 mm_segment_t old_fs = get_fs();
802
803 info.si_signo = 0;
804 set_fs(KERNEL_DS);
805 ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
806 uru ? (struct rusage __user *) &ru : NULL);
807 set_fs(old_fs);
808
809 if (ret < 0 || info.si_signo == 0)
810 return ret;
811
812 if (uru && (ret = put_compat_rusage(&ru, uru)))
813 return ret;
814
815 BUG_ON(info.si_code & __SI_MASK);
816 info.si_code |= __SI_CHLD;
817 return copy_siginfo_to_user32(uinfo, &info);
818}
819
