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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
352SYSCALL_DEFINE3(32_sigaction, long, 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
485int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
486{
487 memset(to, 0, sizeof *to);
488
489 if (copy_from_user(to, from, 3*sizeof(int)) ||
490 copy_from_user(to->_sifields._pad,
491 from->_sifields._pad, SI_PAD_SIZE32))
492 return -EFAULT;
493
494 return 0;
495}
496
497asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
498{
499 struct sigframe32 __user *frame;
500 sigset_t blocked;
501 int sig;
502
503 frame = (struct sigframe32 __user *) regs.regs[29];
504 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
505 goto badframe;
506 if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
507 goto badframe;
508
509 sigdelsetmask(&blocked, ~_BLOCKABLE);
510 spin_lock_irq(¤t->sighand->siglock);
511 current->blocked = blocked;
512 recalc_sigpending();
513 spin_unlock_irq(¤t->sighand->siglock);
514
515 sig = restore_sigcontext32(®s, &frame->sf_sc);
516 if (sig < 0)
517 goto badframe;
518 else if (sig)
519 force_sig(sig, current);
520
521
522
523
524 __asm__ __volatile__(
525 "move\t$29, %0\n\t"
526 "j\tsyscall_exit"
527 :
528 :"r" (®s));
529
530
531badframe:
532 force_sig(SIGSEGV, current);
533}
534
535asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
536{
537 struct rt_sigframe32 __user *frame;
538 mm_segment_t old_fs;
539 sigset_t set;
540 stack_t st;
541 s32 sp;
542 int sig;
543
544 frame = (struct rt_sigframe32 __user *) regs.regs[29];
545 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
546 goto badframe;
547 if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
548 goto badframe;
549
550 sigdelsetmask(&set, ~_BLOCKABLE);
551 spin_lock_irq(¤t->sighand->siglock);
552 current->blocked = set;
553 recalc_sigpending();
554 spin_unlock_irq(¤t->sighand->siglock);
555
556 sig = restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext);
557 if (sig < 0)
558 goto badframe;
559 else if (sig)
560 force_sig(sig, current);
561
562
563 if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
564 goto badframe;
565 st.ss_sp = (void __user *)(long) sp;
566 if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
567 goto badframe;
568 if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
569 goto badframe;
570
571
572
573 old_fs = get_fs();
574 set_fs(KERNEL_DS);
575 do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
576 set_fs(old_fs);
577
578
579
580
581 __asm__ __volatile__(
582 "move\t$29, %0\n\t"
583 "j\tsyscall_exit"
584 :
585 :"r" (®s));
586
587
588badframe:
589 force_sig(SIGSEGV, current);
590}
591
592static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
593 int signr, sigset_t *set)
594{
595 struct sigframe32 __user *frame;
596 int err = 0;
597
598 frame = get_sigframe(ka, regs, sizeof(*frame));
599 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
600 goto give_sigsegv;
601
602 err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn);
603
604 err |= setup_sigcontext32(regs, &frame->sf_sc);
605 err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
606
607 if (err)
608 goto give_sigsegv;
609
610
611
612
613
614
615
616
617
618
619
620 regs->regs[ 4] = signr;
621 regs->regs[ 5] = 0;
622 regs->regs[ 6] = (unsigned long) &frame->sf_sc;
623 regs->regs[29] = (unsigned long) frame;
624 regs->regs[31] = (unsigned long) frame->sf_code;
625 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
626
627 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
628 current->comm, current->pid,
629 frame, regs->cp0_epc, regs->regs[31]);
630
631 return 0;
632
633give_sigsegv:
634 force_sigsegv(signr, current);
635 return -EFAULT;
636}
637
638static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
639 int signr, sigset_t *set, siginfo_t *info)
640{
641 struct rt_sigframe32 __user *frame;
642 int err = 0;
643 s32 sp;
644
645 frame = get_sigframe(ka, regs, sizeof(*frame));
646 if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
647 goto give_sigsegv;
648
649 err |= install_sigtramp(frame->rs_code, __NR_O32_rt_sigreturn);
650
651
652 err |= copy_siginfo_to_user32(&frame->rs_info, info);
653
654
655 err |= __put_user(0, &frame->rs_uc.uc_flags);
656 err |= __put_user(0, &frame->rs_uc.uc_link);
657 sp = (int) (long) current->sas_ss_sp;
658 err |= __put_user(sp,
659 &frame->rs_uc.uc_stack.ss_sp);
660 err |= __put_user(sas_ss_flags(regs->regs[29]),
661 &frame->rs_uc.uc_stack.ss_flags);
662 err |= __put_user(current->sas_ss_size,
663 &frame->rs_uc.uc_stack.ss_size);
664 err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
665 err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
666
667 if (err)
668 goto give_sigsegv;
669
670
671
672
673
674
675
676
677
678
679
680 regs->regs[ 4] = signr;
681 regs->regs[ 5] = (unsigned long) &frame->rs_info;
682 regs->regs[ 6] = (unsigned long) &frame->rs_uc;
683 regs->regs[29] = (unsigned long) frame;
684 regs->regs[31] = (unsigned long) frame->rs_code;
685 regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
686
687 DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
688 current->comm, current->pid,
689 frame, regs->cp0_epc, regs->regs[31]);
690
691 return 0;
692
693give_sigsegv:
694 force_sigsegv(signr, current);
695 return -EFAULT;
696}
697
698
699
700
701struct mips_abi mips_abi_32 = {
702 .setup_frame = setup_frame_32,
703 .setup_rt_frame = setup_rt_frame_32,
704 .restart = __NR_O32_restart_syscall
705};
706
707SYSCALL_DEFINE4(32_rt_sigaction, int, sig,
708 const struct sigaction32 __user *, act,
709 struct sigaction32 __user *, oact, unsigned int, sigsetsize)
710{
711 struct k_sigaction new_sa, old_sa;
712 int ret = -EINVAL;
713
714
715 if (sigsetsize != sizeof(sigset_t))
716 goto out;
717
718 if (act) {
719 s32 handler;
720 int err = 0;
721
722 if (!access_ok(VERIFY_READ, act, sizeof(*act)))
723 return -EFAULT;
724 err |= __get_user(handler, &act->sa_handler);
725 new_sa.sa.sa_handler = (void __user *)(s64)handler;
726 err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
727 err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
728 if (err)
729 return -EFAULT;
730 }
731
732 ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
733
734 if (!ret && oact) {
735 int err = 0;
736
737 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
738 return -EFAULT;
739
740 err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
741 &oact->sa_handler);
742 err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
743 err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
744 if (err)
745 return -EFAULT;
746 }
747out:
748 return ret;
749}
750
751SYSCALL_DEFINE4(32_rt_sigprocmask, int, how, compat_sigset_t __user *, set,
752 compat_sigset_t __user *, oset, unsigned int, sigsetsize)
753{
754 sigset_t old_set, new_set;
755 int ret;
756 mm_segment_t old_fs = get_fs();
757
758 if (set && get_sigset(&new_set, set))
759 return -EFAULT;
760
761 set_fs(KERNEL_DS);
762 ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
763 oset ? (sigset_t __user *)&old_set : NULL,
764 sigsetsize);
765 set_fs(old_fs);
766
767 if (!ret && oset && put_sigset(&old_set, oset))
768 return -EFAULT;
769
770 return ret;
771}
772
773SYSCALL_DEFINE2(32_rt_sigpending, compat_sigset_t __user *, uset,
774 unsigned int, sigsetsize)
775{
776 int ret;
777 sigset_t set;
778 mm_segment_t old_fs = get_fs();
779
780 set_fs(KERNEL_DS);
781 ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
782 set_fs(old_fs);
783
784 if (!ret && put_sigset(&set, uset))
785 return -EFAULT;
786
787 return ret;
788}
789
790SYSCALL_DEFINE3(32_rt_sigqueueinfo, int, pid, int, sig,
791 compat_siginfo_t __user *, uinfo)
792{
793 siginfo_t info;
794 int ret;
795 mm_segment_t old_fs = get_fs();
796
797 if (copy_from_user(&info, uinfo, 3*sizeof(int)) ||
798 copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
799 return -EFAULT;
800 set_fs(KERNEL_DS);
801 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
802 set_fs(old_fs);
803 return ret;
804}
805
806SYSCALL_DEFINE5(32_waitid, int, which, compat_pid_t, pid,
807 compat_siginfo_t __user *, uinfo, int, options,
808 struct compat_rusage __user *, uru)
809{
810 siginfo_t info;
811 struct rusage ru;
812 long ret;
813 mm_segment_t old_fs = get_fs();
814
815 info.si_signo = 0;
816 set_fs(KERNEL_DS);
817 ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
818 uru ? (struct rusage __user *) &ru : NULL);
819 set_fs(old_fs);
820
821 if (ret < 0 || info.si_signo == 0)
822 return ret;
823
824 if (uru && (ret = put_compat_rusage(&ru, uru)))
825 return ret;
826
827 BUG_ON(info.si_code & __SI_MASK);
828 info.si_code |= __SI_CHLD;
829 return copy_siginfo_to_user32(uinfo, &info);
830}
831
