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-rw-r--r--arch/s390/kernel/compat_signal.c648
1 files changed, 648 insertions, 0 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
new file mode 100644
index 000000000000..d05d65ac9694
--- /dev/null
+++ b/arch/s390/kernel/compat_signal.c
@@ -0,0 +1,648 @@
1/*
2 * arch/s390/kernel/signal32.c
3 *
4 * S390 version
5 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
7 * Gerhard Tonn (ton@de.ibm.com)
8 *
9 * Copyright (C) 1991, 1992 Linus Torvalds
10 *
11 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
12 */
13
14#include <linux/config.h>
15#include <linux/compat.h>
16#include <linux/sched.h>
17#include <linux/mm.h>
18#include <linux/smp.h>
19#include <linux/smp_lock.h>
20#include <linux/kernel.h>
21#include <linux/signal.h>
22#include <linux/errno.h>
23#include <linux/wait.h>
24#include <linux/ptrace.h>
25#include <linux/unistd.h>
26#include <linux/stddef.h>
27#include <linux/tty.h>
28#include <linux/personality.h>
29#include <linux/binfmts.h>
30#include <asm/ucontext.h>
31#include <asm/uaccess.h>
32#include <asm/lowcore.h>
33#include "compat_linux.h"
34#include "compat_ptrace.h"
35
36#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
37
38typedef struct
39{
40 __u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
41 struct sigcontext32 sc;
42 _sigregs32 sregs;
43 int signo;
44 __u8 retcode[S390_SYSCALL_SIZE];
45} sigframe32;
46
47typedef struct
48{
49 __u8 callee_used_stack[__SIGNAL_FRAMESIZE32];
50 __u8 retcode[S390_SYSCALL_SIZE];
51 compat_siginfo_t info;
52 struct ucontext32 uc;
53} rt_sigframe32;
54
55asmlinkage int FASTCALL(do_signal(struct pt_regs *regs, sigset_t *oldset));
56
57int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
58{
59 int err;
60
61 if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
62 return -EFAULT;
63
64 /* If you change siginfo_t structure, please be sure
65 this code is fixed accordingly.
66 It should never copy any pad contained in the structure
67 to avoid security leaks, but must copy the generic
68 3 ints plus the relevant union member.
69 This routine must convert siginfo from 64bit to 32bit as well
70 at the same time. */
71 err = __put_user(from->si_signo, &to->si_signo);
72 err |= __put_user(from->si_errno, &to->si_errno);
73 err |= __put_user((short)from->si_code, &to->si_code);
74 if (from->si_code < 0)
75 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
76 else {
77 switch (from->si_code >> 16) {
78 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
79 case __SI_MESGQ >> 16:
80 err |= __put_user(from->si_int, &to->si_int);
81 /* fallthrough */
82 case __SI_KILL >> 16:
83 err |= __put_user(from->si_pid, &to->si_pid);
84 err |= __put_user(from->si_uid, &to->si_uid);
85 break;
86 case __SI_CHLD >> 16:
87 err |= __put_user(from->si_pid, &to->si_pid);
88 err |= __put_user(from->si_uid, &to->si_uid);
89 err |= __put_user(from->si_utime, &to->si_utime);
90 err |= __put_user(from->si_stime, &to->si_stime);
91 err |= __put_user(from->si_status, &to->si_status);
92 break;
93 case __SI_FAULT >> 16:
94 err |= __put_user((unsigned long) from->si_addr,
95 &to->si_addr);
96 break;
97 case __SI_POLL >> 16:
98 err |= __put_user(from->si_band, &to->si_band);
99 err |= __put_user(from->si_fd, &to->si_fd);
100 break;
101 case __SI_TIMER >> 16:
102 err |= __put_user(from->si_tid, &to->si_tid);
103 err |= __put_user(from->si_overrun, &to->si_overrun);
104 err |= __put_user(from->si_int, &to->si_int);
105 break;
106 default:
107 break;
108 }
109 }
110 return err;
111}
112
113int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
114{
115 int err;
116 u32 tmp;
117
118 if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t)))
119 return -EFAULT;
120
121 err = __get_user(to->si_signo, &from->si_signo);
122 err |= __get_user(to->si_errno, &from->si_errno);
123 err |= __get_user(to->si_code, &from->si_code);
124
125 if (to->si_code < 0)
126 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
127 else {
128 switch (to->si_code >> 16) {
129 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
130 case __SI_MESGQ >> 16:
131 err |= __get_user(to->si_int, &from->si_int);
132 /* fallthrough */
133 case __SI_KILL >> 16:
134 err |= __get_user(to->si_pid, &from->si_pid);
135 err |= __get_user(to->si_uid, &from->si_uid);
136 break;
137 case __SI_CHLD >> 16:
138 err |= __get_user(to->si_pid, &from->si_pid);
139 err |= __get_user(to->si_uid, &from->si_uid);
140 err |= __get_user(to->si_utime, &from->si_utime);
141 err |= __get_user(to->si_stime, &from->si_stime);
142 err |= __get_user(to->si_status, &from->si_status);
143 break;
144 case __SI_FAULT >> 16:
145 err |= __get_user(tmp, &from->si_addr);
146 to->si_addr = (void *)(u64) (tmp & PSW32_ADDR_INSN);
147 break;
148 case __SI_POLL >> 16:
149 err |= __get_user(to->si_band, &from->si_band);
150 err |= __get_user(to->si_fd, &from->si_fd);
151 break;
152 case __SI_TIMER >> 16:
153 err |= __get_user(to->si_tid, &from->si_tid);
154 err |= __get_user(to->si_overrun, &from->si_overrun);
155 err |= __get_user(to->si_int, &from->si_int);
156 break;
157 default:
158 break;
159 }
160 }
161 return err;
162}
163
164/*
165 * Atomically swap in the new signal mask, and wait for a signal.
166 */
167asmlinkage int
168sys32_sigsuspend(struct pt_regs * regs,int history0, int history1, old_sigset_t mask)
169{
170 sigset_t saveset;
171
172 mask &= _BLOCKABLE;
173 spin_lock_irq(&current->sighand->siglock);
174 saveset = current->blocked;
175 siginitset(&current->blocked, mask);
176 recalc_sigpending();
177 spin_unlock_irq(&current->sighand->siglock);
178 regs->gprs[2] = -EINTR;
179
180 while (1) {
181 set_current_state(TASK_INTERRUPTIBLE);
182 schedule();
183 if (do_signal(regs, &saveset))
184 return -EINTR;
185 }
186}
187
188asmlinkage int
189sys32_rt_sigsuspend(struct pt_regs * regs, compat_sigset_t __user *unewset,
190 size_t sigsetsize)
191{
192 sigset_t saveset, newset;
193 compat_sigset_t set32;
194
195 /* XXX: Don't preclude handling different sized sigset_t's. */
196 if (sigsetsize != sizeof(sigset_t))
197 return -EINVAL;
198
199 if (copy_from_user(&set32, unewset, sizeof(set32)))
200 return -EFAULT;
201 switch (_NSIG_WORDS) {
202 case 4: newset.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
203 case 3: newset.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
204 case 2: newset.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
205 case 1: newset.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
206 }
207 sigdelsetmask(&newset, ~_BLOCKABLE);
208
209 spin_lock_irq(&current->sighand->siglock);
210 saveset = current->blocked;
211 current->blocked = newset;
212 recalc_sigpending();
213 spin_unlock_irq(&current->sighand->siglock);
214 regs->gprs[2] = -EINTR;
215
216 while (1) {
217 set_current_state(TASK_INTERRUPTIBLE);
218 schedule();
219 if (do_signal(regs, &saveset))
220 return -EINTR;
221 }
222}
223
224asmlinkage long
225sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
226 struct old_sigaction32 __user *oact)
227{
228 struct k_sigaction new_ka, old_ka;
229 unsigned long sa_handler, sa_restorer;
230 int ret;
231
232 if (act) {
233 compat_old_sigset_t mask;
234 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
235 __get_user(sa_handler, &act->sa_handler) ||
236 __get_user(sa_restorer, &act->sa_restorer))
237 return -EFAULT;
238 new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
239 new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer;
240 __get_user(new_ka.sa.sa_flags, &act->sa_flags);
241 __get_user(mask, &act->sa_mask);
242 siginitset(&new_ka.sa.sa_mask, mask);
243 }
244
245 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
246
247 if (!ret && oact) {
248 sa_handler = (unsigned long) old_ka.sa.sa_handler;
249 sa_restorer = (unsigned long) old_ka.sa.sa_restorer;
250 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
251 __put_user(sa_handler, &oact->sa_handler) ||
252 __put_user(sa_restorer, &oact->sa_restorer))
253 return -EFAULT;
254 __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
255 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
256 }
257
258 return ret;
259}
260
261int
262do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact);
263
264asmlinkage long
265sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
266 struct sigaction32 __user *oact, size_t sigsetsize)
267{
268 struct k_sigaction new_ka, old_ka;
269 unsigned long sa_handler;
270 int ret;
271 compat_sigset_t set32;
272
273 /* XXX: Don't preclude handling different sized sigset_t's. */
274 if (sigsetsize != sizeof(compat_sigset_t))
275 return -EINVAL;
276
277 if (act) {
278 ret = get_user(sa_handler, &act->sa_handler);
279 ret |= __copy_from_user(&set32, &act->sa_mask,
280 sizeof(compat_sigset_t));
281 switch (_NSIG_WORDS) {
282 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
283 | (((long)set32.sig[7]) << 32);
284 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
285 | (((long)set32.sig[5]) << 32);
286 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
287 | (((long)set32.sig[3]) << 32);
288 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
289 | (((long)set32.sig[1]) << 32);
290 }
291 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
292
293 if (ret)
294 return -EFAULT;
295 new_ka.sa.sa_handler = (__sighandler_t) sa_handler;
296 }
297
298 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
299
300 if (!ret && oact) {
301 switch (_NSIG_WORDS) {
302 case 4:
303 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
304 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
305 case 3:
306 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
307 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
308 case 2:
309 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
310 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
311 case 1:
312 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
313 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
314 }
315 ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler);
316 ret |= __copy_to_user(&oact->sa_mask, &set32,
317 sizeof(compat_sigset_t));
318 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
319 }
320
321 return ret;
322}
323
324asmlinkage long
325sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss,
326 struct pt_regs *regs)
327{
328 stack_t kss, koss;
329 unsigned long ss_sp;
330 int ret, err = 0;
331 mm_segment_t old_fs = get_fs();
332
333 if (uss) {
334 if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
335 return -EFAULT;
336 err |= __get_user(ss_sp, &uss->ss_sp);
337 err |= __get_user(kss.ss_size, &uss->ss_size);
338 err |= __get_user(kss.ss_flags, &uss->ss_flags);
339 if (err)
340 return -EFAULT;
341 kss.ss_sp = (void *) ss_sp;
342 }
343
344 set_fs (KERNEL_DS);
345 ret = do_sigaltstack((stack_t __user *) (uss ? &kss : NULL),
346 (stack_t __user *) (uoss ? &koss : NULL),
347 regs->gprs[15]);
348 set_fs (old_fs);
349
350 if (!ret && uoss) {
351 if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
352 return -EFAULT;
353 ss_sp = (unsigned long) koss.ss_sp;
354 err |= __put_user(ss_sp, &uoss->ss_sp);
355 err |= __put_user(koss.ss_size, &uoss->ss_size);
356 err |= __put_user(koss.ss_flags, &uoss->ss_flags);
357 if (err)
358 return -EFAULT;
359 }
360 return ret;
361}
362
363static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
364{
365 _s390_regs_common32 regs32;
366 int err, i;
367
368 regs32.psw.mask = PSW32_MASK_MERGE(PSW32_USER_BITS,
369 (__u32)(regs->psw.mask >> 32));
370 regs32.psw.addr = PSW32_ADDR_AMODE31 | (__u32) regs->psw.addr;
371 for (i = 0; i < NUM_GPRS; i++)
372 regs32.gprs[i] = (__u32) regs->gprs[i];
373 save_access_regs(current->thread.acrs);
374 memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs));
375 err = __copy_to_user(&sregs->regs, &regs32, sizeof(regs32));
376 if (err)
377 return err;
378 save_fp_regs(&current->thread.fp_regs);
379 /* s390_fp_regs and _s390_fp_regs32 are the same ! */
380 return __copy_to_user(&sregs->fpregs, &current->thread.fp_regs,
381 sizeof(_s390_fp_regs32));
382}
383
384static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
385{
386 _s390_regs_common32 regs32;
387 int err, i;
388
389 /* Alwys make any pending restarted system call return -EINTR */
390 current_thread_info()->restart_block.fn = do_no_restart_syscall;
391
392 err = __copy_from_user(&regs32, &sregs->regs, sizeof(regs32));
393 if (err)
394 return err;
395 regs->psw.mask = PSW_MASK_MERGE(regs->psw.mask,
396 (__u64)regs32.psw.mask << 32);
397 regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN);
398 for (i = 0; i < NUM_GPRS; i++)
399 regs->gprs[i] = (__u64) regs32.gprs[i];
400 memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs));
401 restore_access_regs(current->thread.acrs);
402
403 err = __copy_from_user(&current->thread.fp_regs, &sregs->fpregs,
404 sizeof(_s390_fp_regs32));
405 current->thread.fp_regs.fpc &= FPC_VALID_MASK;
406 if (err)
407 return err;
408
409 restore_fp_regs(&current->thread.fp_regs);
410 regs->trap = -1; /* disable syscall checks */
411 return 0;
412}
413
414asmlinkage long sys32_sigreturn(struct pt_regs *regs)
415{
416 sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
417 sigset_t set;
418
419 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
420 goto badframe;
421 if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
422 goto badframe;
423
424 sigdelsetmask(&set, ~_BLOCKABLE);
425 spin_lock_irq(&current->sighand->siglock);
426 current->blocked = set;
427 recalc_sigpending();
428 spin_unlock_irq(&current->sighand->siglock);
429
430 if (restore_sigregs32(regs, &frame->sregs))
431 goto badframe;
432
433 return regs->gprs[2];
434
435badframe:
436 force_sig(SIGSEGV, current);
437 return 0;
438}
439
440asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
441{
442 rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
443 sigset_t set;
444 stack_t st;
445 __u32 ss_sp;
446 int err;
447 mm_segment_t old_fs = get_fs();
448
449 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
450 goto badframe;
451 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
452 goto badframe;
453
454 sigdelsetmask(&set, ~_BLOCKABLE);
455 spin_lock_irq(&current->sighand->siglock);
456 current->blocked = set;
457 recalc_sigpending();
458 spin_unlock_irq(&current->sighand->siglock);
459
460 if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
461 goto badframe;
462
463 err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
464 st.ss_sp = (void *) A((unsigned long)ss_sp);
465 err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
466 err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
467 if (err)
468 goto badframe;
469
470 /* It is more difficult to avoid calling this function than to
471 call it and ignore errors. */
472 set_fs (KERNEL_DS);
473 do_sigaltstack((stack_t __user *)&st, NULL, regs->gprs[15]);
474 set_fs (old_fs);
475
476 return regs->gprs[2];
477
478badframe:
479 force_sig(SIGSEGV, current);
480 return 0;
481}
482
483/*
484 * Set up a signal frame.
485 */
486
487
488/*
489 * Determine which stack to use..
490 */
491static inline void __user *
492get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
493{
494 unsigned long sp;
495
496 /* Default to using normal stack */
497 sp = (unsigned long) A(regs->gprs[15]);
498
499 /* This is the X/Open sanctioned signal stack switching. */
500 if (ka->sa.sa_flags & SA_ONSTACK) {
501 if (! on_sig_stack(sp))
502 sp = current->sas_ss_sp + current->sas_ss_size;
503 }
504
505 /* This is the legacy signal stack switching. */
506 else if (!user_mode(regs) &&
507 !(ka->sa.sa_flags & SA_RESTORER) &&
508 ka->sa.sa_restorer) {
509 sp = (unsigned long) ka->sa.sa_restorer;
510 }
511
512 return (void __user *)((sp - frame_size) & -8ul);
513}
514
515static inline int map_signal(int sig)
516{
517 if (current_thread_info()->exec_domain
518 && current_thread_info()->exec_domain->signal_invmap
519 && sig < 32)
520 return current_thread_info()->exec_domain->signal_invmap[sig];
521 else
522 return sig;
523}
524
525static void setup_frame32(int sig, struct k_sigaction *ka,
526 sigset_t *set, struct pt_regs * regs)
527{
528 sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));
529 if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32)))
530 goto give_sigsegv;
531
532 if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32))
533 goto give_sigsegv;
534
535 if (save_sigregs32(regs, &frame->sregs))
536 goto give_sigsegv;
537 if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs))
538 goto give_sigsegv;
539
540 /* Set up to return from userspace. If provided, use a stub
541 already in userspace. */
542 if (ka->sa.sa_flags & SA_RESTORER) {
543 regs->gprs[14] = (__u64) ka->sa.sa_restorer;
544 } else {
545 regs->gprs[14] = (__u64) frame->retcode;
546 if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,
547 (u16 __user *)(frame->retcode)))
548 goto give_sigsegv;
549 }
550
551 /* Set up backchain. */
552 if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
553 goto give_sigsegv;
554
555 /* Set up registers for signal handler */
556 regs->gprs[15] = (__u64) frame;
557 regs->psw.addr = (__u64) ka->sa.sa_handler;
558
559 regs->gprs[2] = map_signal(sig);
560 regs->gprs[3] = (__u64) &frame->sc;
561
562 /* We forgot to include these in the sigcontext.
563 To avoid breaking binary compatibility, they are passed as args. */
564 regs->gprs[4] = current->thread.trap_no;
565 regs->gprs[5] = current->thread.prot_addr;
566
567 /* Place signal number on stack to allow backtrace from handler. */
568 if (__put_user(regs->gprs[2], (int __user *) &frame->signo))
569 goto give_sigsegv;
570 return;
571
572give_sigsegv:
573 force_sigsegv(sig, current);
574}
575
576static void setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
577 sigset_t *set, struct pt_regs * regs)
578{
579 int err = 0;
580 rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32));
581 if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32)))
582 goto give_sigsegv;
583
584 if (copy_siginfo_to_user32(&frame->info, info))
585 goto give_sigsegv;
586
587 /* Create the ucontext. */
588 err |= __put_user(0, &frame->uc.uc_flags);
589 err |= __put_user(0, &frame->uc.uc_link);
590 err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
591 err |= __put_user(sas_ss_flags(regs->gprs[15]),
592 &frame->uc.uc_stack.ss_flags);
593 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
594 err |= save_sigregs32(regs, &frame->uc.uc_mcontext);
595 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
596 if (err)
597 goto give_sigsegv;
598
599 /* Set up to return from userspace. If provided, use a stub
600 already in userspace. */
601 if (ka->sa.sa_flags & SA_RESTORER) {
602 regs->gprs[14] = (__u64) ka->sa.sa_restorer;
603 } else {
604 regs->gprs[14] = (__u64) frame->retcode;
605 err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,
606 (u16 __user *)(frame->retcode));
607 }
608
609 /* Set up backchain. */
610 if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
611 goto give_sigsegv;
612
613 /* Set up registers for signal handler */
614 regs->gprs[15] = (__u64) frame;
615 regs->psw.addr = (__u64) ka->sa.sa_handler;
616
617 regs->gprs[2] = map_signal(sig);
618 regs->gprs[3] = (__u64) &frame->info;
619 regs->gprs[4] = (__u64) &frame->uc;
620 return;
621
622give_sigsegv:
623 force_sigsegv(sig, current);
624}
625
626/*
627 * OK, we're invoking a handler
628 */
629
630void
631handle_signal32(unsigned long sig, struct k_sigaction *ka,
632 siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
633{
634 /* Set up the stack frame */
635 if (ka->sa.sa_flags & SA_SIGINFO)
636 setup_rt_frame32(sig, ka, info, oldset, regs);
637 else
638 setup_frame32(sig, ka, oldset, regs);
639
640 if (!(ka->sa.sa_flags & SA_NODEFER)) {
641 spin_lock_irq(&current->sighand->siglock);
642 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
643 sigaddset(&current->blocked,sig);
644 recalc_sigpending();
645 spin_unlock_irq(&current->sighand->siglock);
646 }
647}
648
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 21:13:15 -0500