aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/kernel
diff options
context:
space:
mode:
authorGreg Ungerer <gerg@uclinux.org>2012-03-13 23:22:25 -0400
committerGreg Ungerer <gerg@uclinux.org>2012-05-20 07:21:08 -0400
commit0c22fafd312cd8658ca23f6067a20aec0781c02a (patch)
tree147230e8fef212a4f80cc0beeb3ad0321129540a /arch/m68k/kernel
parent36be50515fe2aef61533b516fa2576a2c7fe7664 (diff)
m68k: merge the MMU and non-MMU signal.c code
The MMU (signal_mm.c) and non-MMU (signal_no.c) versions of the m68k architecture signal handling code are very similar. Most of their code is the same. Merge the two back into a single signal.c, and move some of the code around inside the file to minimize the number of #ifdefs required. Specificially we can group out the CONFIG_FPU and the CONFIG_MMU code. We end up needing a few other "#ifdef CONFIG_MMU" as well, but not too many. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/kernel')
-rw-r--r--arch/m68k/kernel/signal.c1201
-rw-r--r--arch/m68k/kernel/signal_mm.c1115
-rw-r--r--arch/m68k/kernel/signal_no.c765
3 files changed, 1199 insertions, 1882 deletions
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index 2e25713e2ead..1747c7030a33 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -1,5 +1,1202 @@
1/*
2 * linux/arch/m68k/kernel/signal.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
8 * for more details.
9 */
10
11/*
12 * Linux/m68k support by Hamish Macdonald
13 *
14 * 68060 fixes by Jesper Skov
15 *
16 * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab
17 *
18 * mathemu support by Roman Zippel
19 * (Note: fpstate in the signal context is completely ignored for the emulator
20 * and the internal floating point format is put on stack)
21 */
22
23/*
24 * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
25 * Atari :-) Current limitation: Only one sigstack can be active at one time.
26 * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
27 * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
28 * signal handlers!
29 */
30
31#include <linux/sched.h>
32#include <linux/mm.h>
33#include <linux/kernel.h>
34#include <linux/signal.h>
35#include <linux/syscalls.h>
36#include <linux/errno.h>
37#include <linux/wait.h>
38#include <linux/ptrace.h>
39#include <linux/unistd.h>
40#include <linux/stddef.h>
41#include <linux/highuid.h>
42#include <linux/personality.h>
43#include <linux/tty.h>
44#include <linux/binfmts.h>
45#include <linux/module.h>
46
47#include <asm/setup.h>
48#include <asm/uaccess.h>
49#include <asm/pgtable.h>
50#include <asm/traps.h>
51#include <asm/ucontext.h>
52
53#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
54
1#ifdef CONFIG_MMU 55#ifdef CONFIG_MMU
2#include "signal_mm.c" 56
57/*
58 * Handle the slight differences in classic 68k and ColdFire trap frames.
59 */
60#ifdef CONFIG_COLDFIRE
61#define FORMAT 4
62#define FMT4SIZE 0
3#else 63#else
4#include "signal_no.c" 64#define FORMAT 0
65#define FMT4SIZE sizeof(((struct frame *)0)->un.fmt4)
5#endif 66#endif
67
68static const int frame_size_change[16] = {
69 [1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */
70 [2] = sizeof(((struct frame *)0)->un.fmt2),
71 [3] = sizeof(((struct frame *)0)->un.fmt3),
72 [4] = FMT4SIZE,
73 [5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */
74 [6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */
75 [7] = sizeof(((struct frame *)0)->un.fmt7),
76 [8] = -1, /* sizeof(((struct frame *)0)->un.fmt8), */
77 [9] = sizeof(((struct frame *)0)->un.fmt9),
78 [10] = sizeof(((struct frame *)0)->un.fmta),
79 [11] = sizeof(((struct frame *)0)->un.fmtb),
80 [12] = -1, /* sizeof(((struct frame *)0)->un.fmtc), */
81 [13] = -1, /* sizeof(((struct frame *)0)->un.fmtd), */
82 [14] = -1, /* sizeof(((struct frame *)0)->un.fmte), */
83 [15] = -1, /* sizeof(((struct frame *)0)->un.fmtf), */
84};
85
86static inline int frame_extra_sizes(int f)
87{
88 return frame_size_change[f];
89}
90
91int handle_kernel_fault(struct pt_regs *regs)
92{
93 const struct exception_table_entry *fixup;
94 struct pt_regs *tregs;
95
96 /* Are we prepared to handle this kernel fault? */
97 fixup = search_exception_tables(regs->pc);
98 if (!fixup)
99 return 0;
100
101 /* Create a new four word stack frame, discarding the old one. */
102 regs->stkadj = frame_extra_sizes(regs->format);
103 tregs = (struct pt_regs *)((long)regs + regs->stkadj);
104 tregs->vector = regs->vector;
105 tregs->format = FORMAT;
106 tregs->pc = fixup->fixup;
107 tregs->sr = regs->sr;
108
109 return 1;
110}
111
112void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
113{
114 if (regs->orig_d0 < 0)
115 return;
116 switch (regs->d0) {
117 case -ERESTARTNOHAND:
118 case -ERESTARTSYS:
119 case -ERESTARTNOINTR:
120 regs->d0 = regs->orig_d0;
121 regs->orig_d0 = -1;
122 regs->pc -= 2;
123 break;
124 }
125}
126
127static inline void push_cache (unsigned long vaddr)
128{
129 /*
130 * Using the old cache_push_v() was really a big waste.
131 *
132 * What we are trying to do is to flush 8 bytes to ram.
133 * Flushing 2 cache lines of 16 bytes is much cheaper than
134 * flushing 1 or 2 pages, as previously done in
135 * cache_push_v().
136 * Jes
137 */
138 if (CPU_IS_040) {
139 unsigned long temp;
140
141 __asm__ __volatile__ (".chip 68040\n\t"
142 "nop\n\t"
143 "ptestr (%1)\n\t"
144 "movec %%mmusr,%0\n\t"
145 ".chip 68k"
146 : "=r" (temp)
147 : "a" (vaddr));
148
149 temp &= PAGE_MASK;
150 temp |= vaddr & ~PAGE_MASK;
151
152 __asm__ __volatile__ (".chip 68040\n\t"
153 "nop\n\t"
154 "cpushl %%bc,(%0)\n\t"
155 ".chip 68k"
156 : : "a" (temp));
157 }
158 else if (CPU_IS_060) {
159 unsigned long temp;
160 __asm__ __volatile__ (".chip 68060\n\t"
161 "plpar (%0)\n\t"
162 ".chip 68k"
163 : "=a" (temp)
164 : "0" (vaddr));
165 __asm__ __volatile__ (".chip 68060\n\t"
166 "cpushl %%bc,(%0)\n\t"
167 ".chip 68k"
168 : : "a" (temp));
169 } else if (!CPU_IS_COLDFIRE) {
170 /*
171 * 68030/68020 have no writeback cache;
172 * still need to clear icache.
173 * Note that vaddr is guaranteed to be long word aligned.
174 */
175 unsigned long temp;
176 asm volatile ("movec %%cacr,%0" : "=r" (temp));
177 temp += 4;
178 asm volatile ("movec %0,%%caar\n\t"
179 "movec %1,%%cacr"
180 : : "r" (vaddr), "r" (temp));
181 asm volatile ("movec %0,%%caar\n\t"
182 "movec %1,%%cacr"
183 : : "r" (vaddr + 4), "r" (temp));
184 }
185}
186
187static inline void adjustformat(struct pt_regs *regs)
188{
189}
190
191static inline void save_a5_state(struct sigcontext *sc, struct pt_regs *regs)
192{
193}
194
195#else /* CONFIG_MMU */
196
197void ret_from_user_signal(void);
198void ret_from_user_rt_signal(void);
199
200static inline int frame_extra_sizes(int f)
201{
202 /* No frame size adjustments required on non-MMU CPUs */
203 return 0;
204}
205
206static inline void adjustformat(struct pt_regs *regs)
207{
208 ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data;
209 /*
210 * set format byte to make stack appear modulo 4, which it will
211 * be when doing the rte
212 */
213 regs->format = 0x4;
214}
215
216static inline void save_a5_state(struct sigcontext *sc, struct pt_regs *regs)
217{
218 sc->sc_a5 = ((struct switch_stack *)regs - 1)->a5;
219}
220
221static inline void push_cache(unsigned long vaddr)
222{
223}
224
225#endif /* CONFIG_MMU */
226
227/*
228 * Atomically swap in the new signal mask, and wait for a signal.
229 */
230asmlinkage int
231sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
232{
233 mask &= _BLOCKABLE;
234 spin_lock_irq(&current->sighand->siglock);
235 current->saved_sigmask = current->blocked;
236 siginitset(&current->blocked, mask);
237 recalc_sigpending();
238 spin_unlock_irq(&current->sighand->siglock);
239
240 current->state = TASK_INTERRUPTIBLE;
241 schedule();
242 set_restore_sigmask();
243
244 return -ERESTARTNOHAND;
245}
246
247asmlinkage int
248sys_sigaction(int sig, const struct old_sigaction __user *act,
249 struct old_sigaction __user *oact)
250{
251 struct k_sigaction new_ka, old_ka;
252 int ret;
253
254 if (act) {
255 old_sigset_t mask;
256 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
257 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
258 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
259 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
260 __get_user(mask, &act->sa_mask))
261 return -EFAULT;
262 siginitset(&new_ka.sa.sa_mask, mask);
263 }
264
265 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
266
267 if (!ret && oact) {
268 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
269 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
270 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
271 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
272 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
273 return -EFAULT;
274 }
275
276 return ret;
277}
278
279asmlinkage int
280sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
281{
282 return do_sigaltstack(uss, uoss, rdusp());
283}
284
285
286/*
287 * Do a signal return; undo the signal stack.
288 *
289 * Keep the return code on the stack quadword aligned!
290 * That makes the cache flush below easier.
291 */
292
293struct sigframe
294{
295 char __user *pretcode;
296 int sig;
297 int code;
298 struct sigcontext __user *psc;
299 char retcode[8];
300 unsigned long extramask[_NSIG_WORDS-1];
301 struct sigcontext sc;
302};
303
304struct rt_sigframe
305{
306 char __user *pretcode;
307 int sig;
308 struct siginfo __user *pinfo;
309 void __user *puc;
310 char retcode[8];
311 struct siginfo info;
312 struct ucontext uc;
313};
314
315#define FPCONTEXT_SIZE 216
316#define uc_fpstate uc_filler[0]
317#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4]
318#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1]
319
320#ifdef CONFIG_FPU
321
322static unsigned char fpu_version; /* version number of fpu, set by setup_frame */
323
324static inline int restore_fpu_state(struct sigcontext *sc)
325{
326 int err = 1;
327
328 if (FPU_IS_EMU) {
329 /* restore registers */
330 memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
331 memcpy(current->thread.fp, sc->sc_fpregs, 24);
332 return 0;
333 }
334
335 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
336 /* Verify the frame format. */
337 if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
338 (sc->sc_fpstate[0] != fpu_version))
339 goto out;
340 if (CPU_IS_020_OR_030) {
341 if (m68k_fputype & FPU_68881 &&
342 !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
343 goto out;
344 if (m68k_fputype & FPU_68882 &&
345 !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
346 goto out;
347 } else if (CPU_IS_040) {
348 if (!(sc->sc_fpstate[1] == 0x00 ||
349 sc->sc_fpstate[1] == 0x28 ||
350 sc->sc_fpstate[1] == 0x60))
351 goto out;
352 } else if (CPU_IS_060) {
353 if (!(sc->sc_fpstate[3] == 0x00 ||
354 sc->sc_fpstate[3] == 0x60 ||
355 sc->sc_fpstate[3] == 0xe0))
356 goto out;
357 } else if (CPU_IS_COLDFIRE) {
358 if (!(sc->sc_fpstate[0] == 0x00 ||
359 sc->sc_fpstate[0] == 0x05 ||
360 sc->sc_fpstate[0] == 0xe5))
361 goto out;
362 } else
363 goto out;
364
365 if (CPU_IS_COLDFIRE) {
366 __asm__ volatile ("fmovemd %0,%%fp0-%%fp1\n\t"
367 "fmovel %1,%%fpcr\n\t"
368 "fmovel %2,%%fpsr\n\t"
369 "fmovel %3,%%fpiar"
370 : /* no outputs */
371 : "m" (sc->sc_fpregs[0]),
372 "m" (sc->sc_fpcntl[0]),
373 "m" (sc->sc_fpcntl[1]),
374 "m" (sc->sc_fpcntl[2]));
375 } else {
376 __asm__ volatile (".chip 68k/68881\n\t"
377 "fmovemx %0,%%fp0-%%fp1\n\t"
378 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
379 ".chip 68k"
380 : /* no outputs */
381 : "m" (*sc->sc_fpregs),
382 "m" (*sc->sc_fpcntl));
383 }
384 }
385
386 if (CPU_IS_COLDFIRE) {
387 __asm__ volatile ("frestore %0" : : "m" (*sc->sc_fpstate));
388 } else {
389 __asm__ volatile (".chip 68k/68881\n\t"
390 "frestore %0\n\t"
391 ".chip 68k"
392 : : "m" (*sc->sc_fpstate));
393 }
394 err = 0;
395
396out:
397 return err;
398}
399
400static inline int rt_restore_fpu_state(struct ucontext __user *uc)
401{
402 unsigned char fpstate[FPCONTEXT_SIZE];
403 int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
404 fpregset_t fpregs;
405 int err = 1;
406
407 if (FPU_IS_EMU) {
408 /* restore fpu control register */
409 if (__copy_from_user(current->thread.fpcntl,
410 uc->uc_mcontext.fpregs.f_fpcntl, 12))
411 goto out;
412 /* restore all other fpu register */
413 if (__copy_from_user(current->thread.fp,
414 uc->uc_mcontext.fpregs.f_fpregs, 96))
415 goto out;
416 return 0;
417 }
418
419 if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
420 goto out;
421 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
422 if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
423 context_size = fpstate[1];
424 /* Verify the frame format. */
425 if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
426 (fpstate[0] != fpu_version))
427 goto out;
428 if (CPU_IS_020_OR_030) {
429 if (m68k_fputype & FPU_68881 &&
430 !(context_size == 0x18 || context_size == 0xb4))
431 goto out;
432 if (m68k_fputype & FPU_68882 &&
433 !(context_size == 0x38 || context_size == 0xd4))
434 goto out;
435 } else if (CPU_IS_040) {
436 if (!(context_size == 0x00 ||
437 context_size == 0x28 ||
438 context_size == 0x60))
439 goto out;
440 } else if (CPU_IS_060) {
441 if (!(fpstate[3] == 0x00 ||
442 fpstate[3] == 0x60 ||
443 fpstate[3] == 0xe0))
444 goto out;
445 } else if (CPU_IS_COLDFIRE) {
446 if (!(fpstate[3] == 0x00 ||
447 fpstate[3] == 0x05 ||
448 fpstate[3] == 0xe5))
449 goto out;
450 } else
451 goto out;
452 if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
453 sizeof(fpregs)))
454 goto out;
455
456 if (CPU_IS_COLDFIRE) {
457 __asm__ volatile ("fmovemd %0,%%fp0-%%fp7\n\t"
458 "fmovel %1,%%fpcr\n\t"
459 "fmovel %2,%%fpsr\n\t"
460 "fmovel %3,%%fpiar"
461 : /* no outputs */
462 : "m" (fpregs.f_fpregs[0]),
463 "m" (fpregs.f_fpcntl[0]),
464 "m" (fpregs.f_fpcntl[1]),
465 "m" (fpregs.f_fpcntl[2]));
466 } else {
467 __asm__ volatile (".chip 68k/68881\n\t"
468 "fmovemx %0,%%fp0-%%fp7\n\t"
469 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
470 ".chip 68k"
471 : /* no outputs */
472 : "m" (*fpregs.f_fpregs),
473 "m" (*fpregs.f_fpcntl));
474 }
475 }
476 if (context_size &&
477 __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
478 context_size))
479 goto out;
480
481 if (CPU_IS_COLDFIRE) {
482 __asm__ volatile ("frestore %0" : : "m" (*fpstate));
483 } else {
484 __asm__ volatile (".chip 68k/68881\n\t"
485 "frestore %0\n\t"
486 ".chip 68k"
487 : : "m" (*fpstate));
488 }
489 err = 0;
490
491out:
492 return err;
493}
494
495/*
496 * Set up a signal frame.
497 */
498static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
499{
500 if (FPU_IS_EMU) {
501 /* save registers */
502 memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
503 memcpy(sc->sc_fpregs, current->thread.fp, 24);
504 return;
505 }
506
507 if (CPU_IS_COLDFIRE) {
508 __asm__ volatile ("fsave %0"
509 : : "m" (*sc->sc_fpstate) : "memory");
510 } else {
511 __asm__ volatile (".chip 68k/68881\n\t"
512 "fsave %0\n\t"
513 ".chip 68k"
514 : : "m" (*sc->sc_fpstate) : "memory");
515 }
516
517 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
518 fpu_version = sc->sc_fpstate[0];
519 if (CPU_IS_020_OR_030 &&
520 regs->vector >= (VEC_FPBRUC * 4) &&
521 regs->vector <= (VEC_FPNAN * 4)) {
522 /* Clear pending exception in 68882 idle frame */
523 if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
524 sc->sc_fpstate[0x38] |= 1 << 3;
525 }
526
527 if (CPU_IS_COLDFIRE) {
528 __asm__ volatile ("fmovemd %%fp0-%%fp1,%0\n\t"
529 "fmovel %%fpcr,%1\n\t"
530 "fmovel %%fpsr,%2\n\t"
531 "fmovel %%fpiar,%3"
532 : "=m" (sc->sc_fpregs[0]),
533 "=m" (sc->sc_fpcntl[0]),
534 "=m" (sc->sc_fpcntl[1]),
535 "=m" (sc->sc_fpcntl[2])
536 : /* no inputs */
537 : "memory");
538 } else {
539 __asm__ volatile (".chip 68k/68881\n\t"
540 "fmovemx %%fp0-%%fp1,%0\n\t"
541 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
542 ".chip 68k"
543 : "=m" (*sc->sc_fpregs),
544 "=m" (*sc->sc_fpcntl)
545 : /* no inputs */
546 : "memory");
547 }
548 }
549}
550
551static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
552{
553 unsigned char fpstate[FPCONTEXT_SIZE];
554 int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
555 int err = 0;
556
557 if (FPU_IS_EMU) {
558 /* save fpu control register */
559 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
560 current->thread.fpcntl, 12);
561 /* save all other fpu register */
562 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
563 current->thread.fp, 96);
564 return err;
565 }
566
567 if (CPU_IS_COLDFIRE) {
568 __asm__ volatile ("fsave %0" : : "m" (*fpstate) : "memory");
569 } else {
570 __asm__ volatile (".chip 68k/68881\n\t"
571 "fsave %0\n\t"
572 ".chip 68k"
573 : : "m" (*fpstate) : "memory");
574 }
575
576 err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
577 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
578 fpregset_t fpregs;
579 if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
580 context_size = fpstate[1];
581 fpu_version = fpstate[0];
582 if (CPU_IS_020_OR_030 &&
583 regs->vector >= (VEC_FPBRUC * 4) &&
584 regs->vector <= (VEC_FPNAN * 4)) {
585 /* Clear pending exception in 68882 idle frame */
586 if (*(unsigned short *) fpstate == 0x1f38)
587 fpstate[0x38] |= 1 << 3;
588 }
589 if (CPU_IS_COLDFIRE) {
590 __asm__ volatile ("fmovemd %%fp0-%%fp7,%0\n\t"
591 "fmovel %%fpcr,%1\n\t"
592 "fmovel %%fpsr,%2\n\t"
593 "fmovel %%fpiar,%3"
594 : "=m" (fpregs.f_fpregs[0]),
595 "=m" (fpregs.f_fpcntl[0]),
596 "=m" (fpregs.f_fpcntl[1]),
597 "=m" (fpregs.f_fpcntl[2])
598 : /* no inputs */
599 : "memory");
600 } else {
601 __asm__ volatile (".chip 68k/68881\n\t"
602 "fmovemx %%fp0-%%fp7,%0\n\t"
603 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
604 ".chip 68k"
605 : "=m" (*fpregs.f_fpregs),
606 "=m" (*fpregs.f_fpcntl)
607 : /* no inputs */
608 : "memory");
609 }
610 err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
611 sizeof(fpregs));
612 }
613 if (context_size)
614 err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
615 context_size);
616 return err;
617}
618
619#else /* CONFIG_FPU */
620
621/*
622 * For the case with no FPU configured these all do nothing.
623 */
624static inline int restore_fpu_state(struct sigcontext *sc)
625{
626 return 0;
627}
628
629static inline int rt_restore_fpu_state(struct ucontext __user *uc)
630{
631 return 0;
632}
633
634static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
635{
636}
637
638static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
639{
640 return 0;
641}
642
643#endif /* CONFIG_FPU */
644
645static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
646 void __user *fp)
647{
648 int fsize = frame_extra_sizes(formatvec >> 12);
649 if (fsize < 0) {
650 /*
651 * user process trying to return with weird frame format
652 */
653#ifdef DEBUG
654 printk("user process returning with weird frame format\n");
655#endif
656 return 1;
657 }
658 if (!fsize) {
659 regs->format = formatvec >> 12;
660 regs->vector = formatvec & 0xfff;
661 } else {
662 struct switch_stack *sw = (struct switch_stack *)regs - 1;
663 unsigned long buf[fsize / 2]; /* yes, twice as much */
664
665 /* that'll make sure that expansion won't crap over data */
666 if (copy_from_user(buf + fsize / 4, fp, fsize))
667 return 1;
668
669 /* point of no return */
670 regs->format = formatvec >> 12;
671 regs->vector = formatvec & 0xfff;
672#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
673 __asm__ __volatile__ (
674#ifdef CONFIG_COLDFIRE
675 " movel %0,%/sp\n\t"
676 " bra ret_from_signal\n"
677#else
678 " movel %0,%/a0\n\t"
679 " subl %1,%/a0\n\t" /* make room on stack */
680 " movel %/a0,%/sp\n\t" /* set stack pointer */
681 /* move switch_stack and pt_regs */
682 "1: movel %0@+,%/a0@+\n\t"
683 " dbra %2,1b\n\t"
684 " lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
685 " lsrl #2,%1\n\t"
686 " subql #1,%1\n\t"
687 /* copy to the gap we'd made */
688 "2: movel %4@+,%/a0@+\n\t"
689 " dbra %1,2b\n\t"
690 " bral ret_from_signal\n"
691#endif
692 : /* no outputs, it doesn't ever return */
693 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
694 "n" (frame_offset), "a" (buf + fsize/4)
695 : "a0");
696#undef frame_offset
697 }
698 return 0;
699}
700
701static inline int
702restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
703{
704 int formatvec;
705 struct sigcontext context;
706 int err = 0;
707
708 /* Always make any pending restarted system calls return -EINTR */
709 current_thread_info()->restart_block.fn = do_no_restart_syscall;
710
711 /* get previous context */
712 if (copy_from_user(&context, usc, sizeof(context)))
713 goto badframe;
714
715 /* restore passed registers */
716 regs->d0 = context.sc_d0;
717 regs->d1 = context.sc_d1;
718 regs->a0 = context.sc_a0;
719 regs->a1 = context.sc_a1;
720 regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
721 regs->pc = context.sc_pc;
722 regs->orig_d0 = -1; /* disable syscall checks */
723 wrusp(context.sc_usp);
724 formatvec = context.sc_formatvec;
725
726 err = restore_fpu_state(&context);
727
728 if (err || mangle_kernel_stack(regs, formatvec, fp))
729 goto badframe;
730
731 return 0;
732
733badframe:
734 return 1;
735}
736
737static inline int
738rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
739 struct ucontext __user *uc)
740{
741 int temp;
742 greg_t __user *gregs = uc->uc_mcontext.gregs;
743 unsigned long usp;
744 int err;
745
746 /* Always make any pending restarted system calls return -EINTR */
747 current_thread_info()->restart_block.fn = do_no_restart_syscall;
748
749 err = __get_user(temp, &uc->uc_mcontext.version);
750 if (temp != MCONTEXT_VERSION)
751 goto badframe;
752 /* restore passed registers */
753 err |= __get_user(regs->d0, &gregs[0]);
754 err |= __get_user(regs->d1, &gregs[1]);
755 err |= __get_user(regs->d2, &gregs[2]);
756 err |= __get_user(regs->d3, &gregs[3]);
757 err |= __get_user(regs->d4, &gregs[4]);
758 err |= __get_user(regs->d5, &gregs[5]);
759 err |= __get_user(sw->d6, &gregs[6]);
760 err |= __get_user(sw->d7, &gregs[7]);
761 err |= __get_user(regs->a0, &gregs[8]);
762 err |= __get_user(regs->a1, &gregs[9]);
763 err |= __get_user(regs->a2, &gregs[10]);
764 err |= __get_user(sw->a3, &gregs[11]);
765 err |= __get_user(sw->a4, &gregs[12]);
766 err |= __get_user(sw->a5, &gregs[13]);
767 err |= __get_user(sw->a6, &gregs[14]);
768 err |= __get_user(usp, &gregs[15]);
769 wrusp(usp);
770 err |= __get_user(regs->pc, &gregs[16]);
771 err |= __get_user(temp, &gregs[17]);
772 regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
773 regs->orig_d0 = -1; /* disable syscall checks */
774 err |= __get_user(temp, &uc->uc_formatvec);
775
776 err |= rt_restore_fpu_state(uc);
777
778 if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
779 goto badframe;
780
781 if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
782 goto badframe;
783
784 return 0;
785
786badframe:
787 return 1;
788}
789
790asmlinkage int do_sigreturn(unsigned long __unused)
791{
792 struct switch_stack *sw = (struct switch_stack *) &__unused;
793 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
794 unsigned long usp = rdusp();
795 struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
796 sigset_t set;
797
798 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
799 goto badframe;
800 if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
801 (_NSIG_WORDS > 1 &&
802 __copy_from_user(&set.sig[1], &frame->extramask,
803 sizeof(frame->extramask))))
804 goto badframe;
805
806 sigdelsetmask(&set, ~_BLOCKABLE);
807 current->blocked = set;
808 recalc_sigpending();
809
810 if (restore_sigcontext(regs, &frame->sc, frame + 1))
811 goto badframe;
812 return regs->d0;
813
814badframe:
815 force_sig(SIGSEGV, current);
816 return 0;
817}
818
819asmlinkage int do_rt_sigreturn(unsigned long __unused)
820{
821 struct switch_stack *sw = (struct switch_stack *) &__unused;
822 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
823 unsigned long usp = rdusp();
824 struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
825 sigset_t set;
826
827 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
828 goto badframe;
829 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
830 goto badframe;
831
832 sigdelsetmask(&set, ~_BLOCKABLE);
833 current->blocked = set;
834 recalc_sigpending();
835
836 if (rt_restore_ucontext(regs, sw, &frame->uc))
837 goto badframe;
838 return regs->d0;
839
840badframe:
841 force_sig(SIGSEGV, current);
842 return 0;
843}
844
845static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
846 unsigned long mask)
847{
848 sc->sc_mask = mask;
849 sc->sc_usp = rdusp();
850 sc->sc_d0 = regs->d0;
851 sc->sc_d1 = regs->d1;
852 sc->sc_a0 = regs->a0;
853 sc->sc_a1 = regs->a1;
854 sc->sc_sr = regs->sr;
855 sc->sc_pc = regs->pc;
856 sc->sc_formatvec = regs->format << 12 | regs->vector;
857 save_a5_state(sc, regs);
858 save_fpu_state(sc, regs);
859}
860
861static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
862{
863 struct switch_stack *sw = (struct switch_stack *)regs - 1;
864 greg_t __user *gregs = uc->uc_mcontext.gregs;
865 int err = 0;
866
867 err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
868 err |= __put_user(regs->d0, &gregs[0]);
869 err |= __put_user(regs->d1, &gregs[1]);
870 err |= __put_user(regs->d2, &gregs[2]);
871 err |= __put_user(regs->d3, &gregs[3]);
872 err |= __put_user(regs->d4, &gregs[4]);
873 err |= __put_user(regs->d5, &gregs[5]);
874 err |= __put_user(sw->d6, &gregs[6]);
875 err |= __put_user(sw->d7, &gregs[7]);
876 err |= __put_user(regs->a0, &gregs[8]);
877 err |= __put_user(regs->a1, &gregs[9]);
878 err |= __put_user(regs->a2, &gregs[10]);
879 err |= __put_user(sw->a3, &gregs[11]);
880 err |= __put_user(sw->a4, &gregs[12]);
881 err |= __put_user(sw->a5, &gregs[13]);
882 err |= __put_user(sw->a6, &gregs[14]);
883 err |= __put_user(rdusp(), &gregs[15]);
884 err |= __put_user(regs->pc, &gregs[16]);
885 err |= __put_user(regs->sr, &gregs[17]);
886 err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
887 err |= rt_save_fpu_state(uc, regs);
888 return err;
889}
890
891static inline void __user *
892get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
893{
894 unsigned long usp;
895
896 /* Default to using normal stack. */
897 usp = rdusp();
898
899 /* This is the X/Open sanctioned signal stack switching. */
900 if (ka->sa.sa_flags & SA_ONSTACK) {
901 if (!sas_ss_flags(usp))
902 usp = current->sas_ss_sp + current->sas_ss_size;
903 }
904 return (void __user *)((usp - frame_size) & -8UL);
905}
906
907static int setup_frame (int sig, struct k_sigaction *ka,
908 sigset_t *set, struct pt_regs *regs)
909{
910 struct sigframe __user *frame;
911 int fsize = frame_extra_sizes(regs->format);
912 struct sigcontext context;
913 int err = 0;
914
915 if (fsize < 0) {
916#ifdef DEBUG
917 printk ("setup_frame: Unknown frame format %#x\n",
918 regs->format);
919#endif
920 goto give_sigsegv;
921 }
922
923 frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
924
925 if (fsize)
926 err |= copy_to_user (frame + 1, regs + 1, fsize);
927
928 err |= __put_user((current_thread_info()->exec_domain
929 && current_thread_info()->exec_domain->signal_invmap
930 && sig < 32
931 ? current_thread_info()->exec_domain->signal_invmap[sig]
932 : sig),
933 &frame->sig);
934
935 err |= __put_user(regs->vector, &frame->code);
936 err |= __put_user(&frame->sc, &frame->psc);
937
938 if (_NSIG_WORDS > 1)
939 err |= copy_to_user(frame->extramask, &set->sig[1],
940 sizeof(frame->extramask));
941
942 setup_sigcontext(&context, regs, set->sig[0]);
943 err |= copy_to_user (&frame->sc, &context, sizeof(context));
944
945 /* Set up to return from userspace. */
946#ifdef CONFIG_MMU
947 err |= __put_user(frame->retcode, &frame->pretcode);
948 /* moveq #,d0; trap #0 */
949 err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
950 (long __user *)(frame->retcode));
951#else
952 err |= __put_user((void *) ret_from_user_signal, &frame->pretcode);
953#endif
954
955 if (err)
956 goto give_sigsegv;
957
958 push_cache ((unsigned long) &frame->retcode);
959
960 /*
961 * Set up registers for signal handler. All the state we are about
962 * to destroy is successfully copied to sigframe.
963 */
964 wrusp ((unsigned long) frame);
965 regs->pc = (unsigned long) ka->sa.sa_handler;
966 adjustformat(regs);
967
968 /*
969 * This is subtle; if we build more than one sigframe, all but the
970 * first one will see frame format 0 and have fsize == 0, so we won't
971 * screw stkadj.
972 */
973 if (fsize)
974 regs->stkadj = fsize;
975
976 /* Prepare to skip over the extra stuff in the exception frame. */
977 if (regs->stkadj) {
978 struct pt_regs *tregs =
979 (struct pt_regs *)((ulong)regs + regs->stkadj);
980#ifdef DEBUG
981 printk("Performing stackadjust=%04x\n", regs->stkadj);
982#endif
983 /* This must be copied with decreasing addresses to
984 handle overlaps. */
985 tregs->vector = 0;
986 tregs->format = 0;
987 tregs->pc = regs->pc;
988 tregs->sr = regs->sr;
989 }
990 return 0;
991
992give_sigsegv:
993 force_sigsegv(sig, current);
994 return err;
995}
996
997static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
998 sigset_t *set, struct pt_regs *regs)
999{
1000 struct rt_sigframe __user *frame;
1001 int fsize = frame_extra_sizes(regs->format);
1002 int err = 0;
1003
1004 if (fsize < 0) {
1005#ifdef DEBUG
1006 printk ("setup_frame: Unknown frame format %#x\n",
1007 regs->format);
1008#endif
1009 goto give_sigsegv;
1010 }
1011
1012 frame = get_sigframe(ka, regs, sizeof(*frame));
1013
1014 if (fsize)
1015 err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
1016
1017 err |= __put_user((current_thread_info()->exec_domain
1018 && current_thread_info()->exec_domain->signal_invmap
1019 && sig < 32
1020 ? current_thread_info()->exec_domain->signal_invmap[sig]
1021 : sig),
1022 &frame->sig);
1023 err |= __put_user(&frame->info, &frame->pinfo);
1024 err |= __put_user(&frame->uc, &frame->puc);
1025 err |= copy_siginfo_to_user(&frame->info, info);
1026
1027 /* Create the ucontext. */
1028 err |= __put_user(0, &frame->uc.uc_flags);
1029 err |= __put_user(NULL, &frame->uc.uc_link);
1030 err |= __put_user((void __user *)current->sas_ss_sp,
1031 &frame->uc.uc_stack.ss_sp);
1032 err |= __put_user(sas_ss_flags(rdusp()),
1033 &frame->uc.uc_stack.ss_flags);
1034 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
1035 err |= rt_setup_ucontext(&frame->uc, regs);
1036 err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
1037
1038 /* Set up to return from userspace. */
1039#ifdef CONFIG_MMU
1040 err |= __put_user(frame->retcode, &frame->pretcode);
1041#ifdef __mcoldfire__
1042 /* movel #__NR_rt_sigreturn,d0; trap #0 */
1043 err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
1044 err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
1045 (long __user *)(frame->retcode + 4));
1046#else
1047 /* moveq #,d0; notb d0; trap #0 */
1048 err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
1049 (long __user *)(frame->retcode + 0));
1050 err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
1051#endif
1052#else
1053 err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode);
1054#endif /* CONFIG_MMU */
1055
1056 if (err)
1057 goto give_sigsegv;
1058
1059 push_cache ((unsigned long) &frame->retcode);
1060
1061 /*
1062 * Set up registers for signal handler. All the state we are about
1063 * to destroy is successfully copied to sigframe.
1064 */
1065 wrusp ((unsigned long) frame);
1066 regs->pc = (unsigned long) ka->sa.sa_handler;
1067 adjustformat(regs);
1068
1069 /*
1070 * This is subtle; if we build more than one sigframe, all but the
1071 * first one will see frame format 0 and have fsize == 0, so we won't
1072 * screw stkadj.
1073 */
1074 if (fsize)
1075 regs->stkadj = fsize;
1076
1077 /* Prepare to skip over the extra stuff in the exception frame. */
1078 if (regs->stkadj) {
1079 struct pt_regs *tregs =
1080 (struct pt_regs *)((ulong)regs + regs->stkadj);
1081#ifdef DEBUG
1082 printk("Performing stackadjust=%04x\n", regs->stkadj);
1083#endif
1084 /* This must be copied with decreasing addresses to
1085 handle overlaps. */
1086 tregs->vector = 0;
1087 tregs->format = 0;
1088 tregs->pc = regs->pc;
1089 tregs->sr = regs->sr;
1090 }
1091 return 0;
1092
1093give_sigsegv:
1094 force_sigsegv(sig, current);
1095 return err;
1096}
1097
1098static inline void
1099handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
1100{
1101 switch (regs->d0) {
1102 case -ERESTARTNOHAND:
1103 if (!has_handler)
1104 goto do_restart;
1105 regs->d0 = -EINTR;
1106 break;
1107
1108 case -ERESTART_RESTARTBLOCK:
1109 if (!has_handler) {
1110 regs->d0 = __NR_restart_syscall;
1111 regs->pc -= 2;
1112 break;
1113 }
1114 regs->d0 = -EINTR;
1115 break;
1116
1117 case -ERESTARTSYS:
1118 if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
1119 regs->d0 = -EINTR;
1120 break;
1121 }
1122 /* fallthrough */
1123 case -ERESTARTNOINTR:
1124 do_restart:
1125 regs->d0 = regs->orig_d0;
1126 regs->pc -= 2;
1127 break;
1128 }
1129}
1130
1131/*
1132 * OK, we're invoking a handler
1133 */
1134static void
1135handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
1136 sigset_t *oldset, struct pt_regs *regs)
1137{
1138 int err;
1139 /* are we from a system call? */
1140 if (regs->orig_d0 >= 0)
1141 /* If so, check system call restarting.. */
1142 handle_restart(regs, ka, 1);
1143
1144 /* set up the stack frame */
1145 if (ka->sa.sa_flags & SA_SIGINFO)
1146 err = setup_rt_frame(sig, ka, info, oldset, regs);
1147 else
1148 err = setup_frame(sig, ka, oldset, regs);
1149
1150 if (err)
1151 return;
1152
1153 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
1154 if (!(ka->sa.sa_flags & SA_NODEFER))
1155 sigaddset(&current->blocked,sig);
1156 recalc_sigpending();
1157
1158 if (test_thread_flag(TIF_DELAYED_TRACE)) {
1159 regs->sr &= ~0x8000;
1160 send_sig(SIGTRAP, current, 1);
1161 }
1162
1163 clear_thread_flag(TIF_RESTORE_SIGMASK);
1164}
1165
1166/*
1167 * Note that 'init' is a special process: it doesn't get signals it doesn't
1168 * want to handle. Thus you cannot kill init even with a SIGKILL even by
1169 * mistake.
1170 */
1171asmlinkage void do_signal(struct pt_regs *regs)
1172{
1173 siginfo_t info;
1174 struct k_sigaction ka;
1175 int signr;
1176 sigset_t *oldset;
1177
1178 current->thread.esp0 = (unsigned long) regs;
1179
1180 if (test_thread_flag(TIF_RESTORE_SIGMASK))
1181 oldset = &current->saved_sigmask;
1182 else
1183 oldset = &current->blocked;
1184
1185 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
1186 if (signr > 0) {
1187 /* Whee! Actually deliver the signal. */
1188 handle_signal(signr, &ka, &info, oldset, regs);
1189 return;
1190 }
1191
1192 /* Did we come from a system call? */
1193 if (regs->orig_d0 >= 0)
1194 /* Restart the system call - no handlers present */
1195 handle_restart(regs, NULL, 0);
1196
1197 /* If there's no signal to deliver, we just restore the saved mask. */
1198 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
1199 clear_thread_flag(TIF_RESTORE_SIGMASK);
1200 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
1201 }
1202}
diff --git a/arch/m68k/kernel/signal_mm.c b/arch/m68k/kernel/signal_mm.c
deleted file mode 100644
index cb856f9da655..000000000000
--- a/arch/m68k/kernel/signal_mm.c
+++ /dev/null
@@ -1,1115 +0,0 @@
1/*
2 * linux/arch/m68k/kernel/signal.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
8 * for more details.
9 */
10
11/*
12 * Linux/m68k support by Hamish Macdonald
13 *
14 * 68060 fixes by Jesper Skov
15 *
16 * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab
17 *
18 * mathemu support by Roman Zippel
19 * (Note: fpstate in the signal context is completely ignored for the emulator
20 * and the internal floating point format is put on stack)
21 */
22
23/*
24 * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
25 * Atari :-) Current limitation: Only one sigstack can be active at one time.
26 * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
27 * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
28 * signal handlers!
29 */
30
31#include <linux/sched.h>
32#include <linux/mm.h>
33#include <linux/kernel.h>
34#include <linux/signal.h>
35#include <linux/syscalls.h>
36#include <linux/errno.h>
37#include <linux/wait.h>
38#include <linux/ptrace.h>
39#include <linux/unistd.h>
40#include <linux/stddef.h>
41#include <linux/highuid.h>
42#include <linux/personality.h>
43#include <linux/tty.h>
44#include <linux/binfmts.h>
45#include <linux/module.h>
46
47#include <asm/setup.h>
48#include <asm/uaccess.h>
49#include <asm/pgtable.h>
50#include <asm/traps.h>
51#include <asm/ucontext.h>
52
53#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
54
55static const int frame_extra_sizes[16] = {
56 [1] = -1, /* sizeof(((struct frame *)0)->un.fmt1), */
57 [2] = sizeof(((struct frame *)0)->un.fmt2),
58 [3] = sizeof(((struct frame *)0)->un.fmt3),
59#ifdef CONFIG_COLDFIRE
60 [4] = 0,
61#else
62 [4] = sizeof(((struct frame *)0)->un.fmt4),
63#endif
64 [5] = -1, /* sizeof(((struct frame *)0)->un.fmt5), */
65 [6] = -1, /* sizeof(((struct frame *)0)->un.fmt6), */
66 [7] = sizeof(((struct frame *)0)->un.fmt7),
67 [8] = -1, /* sizeof(((struct frame *)0)->un.fmt8), */
68 [9] = sizeof(((struct frame *)0)->un.fmt9),
69 [10] = sizeof(((struct frame *)0)->un.fmta),
70 [11] = sizeof(((struct frame *)0)->un.fmtb),
71 [12] = -1, /* sizeof(((struct frame *)0)->un.fmtc), */
72 [13] = -1, /* sizeof(((struct frame *)0)->un.fmtd), */
73 [14] = -1, /* sizeof(((struct frame *)0)->un.fmte), */
74 [15] = -1, /* sizeof(((struct frame *)0)->un.fmtf), */
75};
76
77int handle_kernel_fault(struct pt_regs *regs)
78{
79 const struct exception_table_entry *fixup;
80 struct pt_regs *tregs;
81
82 /* Are we prepared to handle this kernel fault? */
83 fixup = search_exception_tables(regs->pc);
84 if (!fixup)
85 return 0;
86
87 /* Create a new four word stack frame, discarding the old one. */
88 regs->stkadj = frame_extra_sizes[regs->format];
89 tregs = (struct pt_regs *)((long)regs + regs->stkadj);
90 tregs->vector = regs->vector;
91#ifdef CONFIG_COLDFIRE
92 tregs->format = 4;
93#else
94 tregs->format = 0;
95#endif
96 tregs->pc = fixup->fixup;
97 tregs->sr = regs->sr;
98
99 return 1;
100}
101
102/*
103 * Atomically swap in the new signal mask, and wait for a signal.
104 */
105asmlinkage int
106sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
107{
108 mask &= _BLOCKABLE;
109 spin_lock_irq(&current->sighand->siglock);
110 current->saved_sigmask = current->blocked;
111 siginitset(&current->blocked, mask);
112 recalc_sigpending();
113 spin_unlock_irq(&current->sighand->siglock);
114
115 current->state = TASK_INTERRUPTIBLE;
116 schedule();
117 set_restore_sigmask();
118
119 return -ERESTARTNOHAND;
120}
121
122asmlinkage int
123sys_sigaction(int sig, const struct old_sigaction __user *act,
124 struct old_sigaction __user *oact)
125{
126 struct k_sigaction new_ka, old_ka;
127 int ret;
128
129 if (act) {
130 old_sigset_t mask;
131 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
132 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
133 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
134 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
135 __get_user(mask, &act->sa_mask))
136 return -EFAULT;
137 siginitset(&new_ka.sa.sa_mask, mask);
138 }
139
140 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
141
142 if (!ret && oact) {
143 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
144 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
145 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
146 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
147 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
148 return -EFAULT;
149 }
150
151 return ret;
152}
153
154asmlinkage int
155sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
156{
157 return do_sigaltstack(uss, uoss, rdusp());
158}
159
160
161/*
162 * Do a signal return; undo the signal stack.
163 *
164 * Keep the return code on the stack quadword aligned!
165 * That makes the cache flush below easier.
166 */
167
168struct sigframe
169{
170 char __user *pretcode;
171 int sig;
172 int code;
173 struct sigcontext __user *psc;
174 char retcode[8];
175 unsigned long extramask[_NSIG_WORDS-1];
176 struct sigcontext sc;
177};
178
179struct rt_sigframe
180{
181 char __user *pretcode;
182 int sig;
183 struct siginfo __user *pinfo;
184 void __user *puc;
185 char retcode[8];
186 struct siginfo info;
187 struct ucontext uc;
188};
189
190
191static unsigned char fpu_version; /* version number of fpu, set by setup_frame */
192
193static inline int restore_fpu_state(struct sigcontext *sc)
194{
195 int err = 1;
196
197 if (FPU_IS_EMU) {
198 /* restore registers */
199 memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
200 memcpy(current->thread.fp, sc->sc_fpregs, 24);
201 return 0;
202 }
203
204 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
205 /* Verify the frame format. */
206 if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
207 (sc->sc_fpstate[0] != fpu_version))
208 goto out;
209 if (CPU_IS_020_OR_030) {
210 if (m68k_fputype & FPU_68881 &&
211 !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
212 goto out;
213 if (m68k_fputype & FPU_68882 &&
214 !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
215 goto out;
216 } else if (CPU_IS_040) {
217 if (!(sc->sc_fpstate[1] == 0x00 ||
218 sc->sc_fpstate[1] == 0x28 ||
219 sc->sc_fpstate[1] == 0x60))
220 goto out;
221 } else if (CPU_IS_060) {
222 if (!(sc->sc_fpstate[3] == 0x00 ||
223 sc->sc_fpstate[3] == 0x60 ||
224 sc->sc_fpstate[3] == 0xe0))
225 goto out;
226 } else if (CPU_IS_COLDFIRE) {
227 if (!(sc->sc_fpstate[0] == 0x00 ||
228 sc->sc_fpstate[0] == 0x05 ||
229 sc->sc_fpstate[0] == 0xe5))
230 goto out;
231 } else
232 goto out;
233
234 if (CPU_IS_COLDFIRE) {
235 __asm__ volatile ("fmovemd %0,%%fp0-%%fp1\n\t"
236 "fmovel %1,%%fpcr\n\t"
237 "fmovel %2,%%fpsr\n\t"
238 "fmovel %3,%%fpiar"
239 : /* no outputs */
240 : "m" (sc->sc_fpregs[0]),
241 "m" (sc->sc_fpcntl[0]),
242 "m" (sc->sc_fpcntl[1]),
243 "m" (sc->sc_fpcntl[2]));
244 } else {
245 __asm__ volatile (".chip 68k/68881\n\t"
246 "fmovemx %0,%%fp0-%%fp1\n\t"
247 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
248 ".chip 68k"
249 : /* no outputs */
250 : "m" (*sc->sc_fpregs),
251 "m" (*sc->sc_fpcntl));
252 }
253 }
254
255 if (CPU_IS_COLDFIRE) {
256 __asm__ volatile ("frestore %0" : : "m" (*sc->sc_fpstate));
257 } else {
258 __asm__ volatile (".chip 68k/68881\n\t"
259 "frestore %0\n\t"
260 ".chip 68k"
261 : : "m" (*sc->sc_fpstate));
262 }
263 err = 0;
264
265out:
266 return err;
267}
268
269#define FPCONTEXT_SIZE 216
270#define uc_fpstate uc_filler[0]
271#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4]
272#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1]
273
274static inline int rt_restore_fpu_state(struct ucontext __user *uc)
275{
276 unsigned char fpstate[FPCONTEXT_SIZE];
277 int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
278 fpregset_t fpregs;
279 int err = 1;
280
281 if (FPU_IS_EMU) {
282 /* restore fpu control register */
283 if (__copy_from_user(current->thread.fpcntl,
284 uc->uc_mcontext.fpregs.f_fpcntl, 12))
285 goto out;
286 /* restore all other fpu register */
287 if (__copy_from_user(current->thread.fp,
288 uc->uc_mcontext.fpregs.f_fpregs, 96))
289 goto out;
290 return 0;
291 }
292
293 if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
294 goto out;
295 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
296 if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
297 context_size = fpstate[1];
298 /* Verify the frame format. */
299 if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
300 (fpstate[0] != fpu_version))
301 goto out;
302 if (CPU_IS_020_OR_030) {
303 if (m68k_fputype & FPU_68881 &&
304 !(context_size == 0x18 || context_size == 0xb4))
305 goto out;
306 if (m68k_fputype & FPU_68882 &&
307 !(context_size == 0x38 || context_size == 0xd4))
308 goto out;
309 } else if (CPU_IS_040) {
310 if (!(context_size == 0x00 ||
311 context_size == 0x28 ||
312 context_size == 0x60))
313 goto out;
314 } else if (CPU_IS_060) {
315 if (!(fpstate[3] == 0x00 ||
316 fpstate[3] == 0x60 ||
317 fpstate[3] == 0xe0))
318 goto out;
319 } else if (CPU_IS_COLDFIRE) {
320 if (!(fpstate[3] == 0x00 ||
321 fpstate[3] == 0x05 ||
322 fpstate[3] == 0xe5))
323 goto out;
324 } else
325 goto out;
326 if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
327 sizeof(fpregs)))
328 goto out;
329
330 if (CPU_IS_COLDFIRE) {
331 __asm__ volatile ("fmovemd %0,%%fp0-%%fp7\n\t"
332 "fmovel %1,%%fpcr\n\t"
333 "fmovel %2,%%fpsr\n\t"
334 "fmovel %3,%%fpiar"
335 : /* no outputs */
336 : "m" (fpregs.f_fpregs[0]),
337 "m" (fpregs.f_fpcntl[0]),
338 "m" (fpregs.f_fpcntl[1]),
339 "m" (fpregs.f_fpcntl[2]));
340 } else {
341 __asm__ volatile (".chip 68k/68881\n\t"
342 "fmovemx %0,%%fp0-%%fp7\n\t"
343 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
344 ".chip 68k"
345 : /* no outputs */
346 : "m" (*fpregs.f_fpregs),
347 "m" (*fpregs.f_fpcntl));
348 }
349 }
350 if (context_size &&
351 __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
352 context_size))
353 goto out;
354
355 if (CPU_IS_COLDFIRE) {
356 __asm__ volatile ("frestore %0" : : "m" (*fpstate));
357 } else {
358 __asm__ volatile (".chip 68k/68881\n\t"
359 "frestore %0\n\t"
360 ".chip 68k"
361 : : "m" (*fpstate));
362 }
363 err = 0;
364
365out:
366 return err;
367}
368
369static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
370 void __user *fp)
371{
372 int fsize = frame_extra_sizes[formatvec >> 12];
373 if (fsize < 0) {
374 /*
375 * user process trying to return with weird frame format
376 */
377#ifdef DEBUG
378 printk("user process returning with weird frame format\n");
379#endif
380 return 1;
381 }
382 if (!fsize) {
383 regs->format = formatvec >> 12;
384 regs->vector = formatvec & 0xfff;
385 } else {
386 struct switch_stack *sw = (struct switch_stack *)regs - 1;
387 unsigned long buf[fsize / 2]; /* yes, twice as much */
388
389 /* that'll make sure that expansion won't crap over data */
390 if (copy_from_user(buf + fsize / 4, fp, fsize))
391 return 1;
392
393 /* point of no return */
394 regs->format = formatvec >> 12;
395 regs->vector = formatvec & 0xfff;
396#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
397 __asm__ __volatile__ (
398#ifdef CONFIG_COLDFIRE
399 " movel %0,%/sp\n\t"
400 " bra ret_from_signal\n"
401#else
402 " movel %0,%/a0\n\t"
403 " subl %1,%/a0\n\t" /* make room on stack */
404 " movel %/a0,%/sp\n\t" /* set stack pointer */
405 /* move switch_stack and pt_regs */
406 "1: movel %0@+,%/a0@+\n\t"
407 " dbra %2,1b\n\t"
408 " lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
409 " lsrl #2,%1\n\t"
410 " subql #1,%1\n\t"
411 /* copy to the gap we'd made */
412 "2: movel %4@+,%/a0@+\n\t"
413 " dbra %1,2b\n\t"
414 " bral ret_from_signal\n"
415#endif
416 : /* no outputs, it doesn't ever return */
417 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
418 "n" (frame_offset), "a" (buf + fsize/4)
419 : "a0");
420#undef frame_offset
421 }
422 return 0;
423}
424
425static inline int
426restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
427{
428 int formatvec;
429 struct sigcontext context;
430 int err;
431
432 /* Always make any pending restarted system calls return -EINTR */
433 current_thread_info()->restart_block.fn = do_no_restart_syscall;
434
435 /* get previous context */
436 if (copy_from_user(&context, usc, sizeof(context)))
437 goto badframe;
438
439 /* restore passed registers */
440 regs->d0 = context.sc_d0;
441 regs->d1 = context.sc_d1;
442 regs->a0 = context.sc_a0;
443 regs->a1 = context.sc_a1;
444 regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
445 regs->pc = context.sc_pc;
446 regs->orig_d0 = -1; /* disable syscall checks */
447 wrusp(context.sc_usp);
448 formatvec = context.sc_formatvec;
449
450 err = restore_fpu_state(&context);
451
452 if (err || mangle_kernel_stack(regs, formatvec, fp))
453 goto badframe;
454
455 return 0;
456
457badframe:
458 return 1;
459}
460
461static inline int
462rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
463 struct ucontext __user *uc)
464{
465 int temp;
466 greg_t __user *gregs = uc->uc_mcontext.gregs;
467 unsigned long usp;
468 int err;
469
470 /* Always make any pending restarted system calls return -EINTR */
471 current_thread_info()->restart_block.fn = do_no_restart_syscall;
472
473 err = __get_user(temp, &uc->uc_mcontext.version);
474 if (temp != MCONTEXT_VERSION)
475 goto badframe;
476 /* restore passed registers */
477 err |= __get_user(regs->d0, &gregs[0]);
478 err |= __get_user(regs->d1, &gregs[1]);
479 err |= __get_user(regs->d2, &gregs[2]);
480 err |= __get_user(regs->d3, &gregs[3]);
481 err |= __get_user(regs->d4, &gregs[4]);
482 err |= __get_user(regs->d5, &gregs[5]);
483 err |= __get_user(sw->d6, &gregs[6]);
484 err |= __get_user(sw->d7, &gregs[7]);
485 err |= __get_user(regs->a0, &gregs[8]);
486 err |= __get_user(regs->a1, &gregs[9]);
487 err |= __get_user(regs->a2, &gregs[10]);
488 err |= __get_user(sw->a3, &gregs[11]);
489 err |= __get_user(sw->a4, &gregs[12]);
490 err |= __get_user(sw->a5, &gregs[13]);
491 err |= __get_user(sw->a6, &gregs[14]);
492 err |= __get_user(usp, &gregs[15]);
493 wrusp(usp);
494 err |= __get_user(regs->pc, &gregs[16]);
495 err |= __get_user(temp, &gregs[17]);
496 regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
497 regs->orig_d0 = -1; /* disable syscall checks */
498 err |= __get_user(temp, &uc->uc_formatvec);
499
500 err |= rt_restore_fpu_state(uc);
501
502 if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
503 goto badframe;
504
505 if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
506 goto badframe;
507
508 return 0;
509
510badframe:
511 return 1;
512}
513
514asmlinkage int do_sigreturn(unsigned long __unused)
515{
516 struct switch_stack *sw = (struct switch_stack *) &__unused;
517 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
518 unsigned long usp = rdusp();
519 struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
520 sigset_t set;
521
522 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
523 goto badframe;
524 if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
525 (_NSIG_WORDS > 1 &&
526 __copy_from_user(&set.sig[1], &frame->extramask,
527 sizeof(frame->extramask))))
528 goto badframe;
529
530 sigdelsetmask(&set, ~_BLOCKABLE);
531 current->blocked = set;
532 recalc_sigpending();
533
534 if (restore_sigcontext(regs, &frame->sc, frame + 1))
535 goto badframe;
536 return regs->d0;
537
538badframe:
539 force_sig(SIGSEGV, current);
540 return 0;
541}
542
543asmlinkage int do_rt_sigreturn(unsigned long __unused)
544{
545 struct switch_stack *sw = (struct switch_stack *) &__unused;
546 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
547 unsigned long usp = rdusp();
548 struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
549 sigset_t set;
550
551 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
552 goto badframe;
553 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
554 goto badframe;
555
556 sigdelsetmask(&set, ~_BLOCKABLE);
557 current->blocked = set;
558 recalc_sigpending();
559
560 if (rt_restore_ucontext(regs, sw, &frame->uc))
561 goto badframe;
562 return regs->d0;
563
564badframe:
565 force_sig(SIGSEGV, current);
566 return 0;
567}
568
569/*
570 * Set up a signal frame.
571 */
572
573static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
574{
575 if (FPU_IS_EMU) {
576 /* save registers */
577 memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
578 memcpy(sc->sc_fpregs, current->thread.fp, 24);
579 return;
580 }
581
582 if (CPU_IS_COLDFIRE) {
583 __asm__ volatile ("fsave %0"
584 : : "m" (*sc->sc_fpstate) : "memory");
585 } else {
586 __asm__ volatile (".chip 68k/68881\n\t"
587 "fsave %0\n\t"
588 ".chip 68k"
589 : : "m" (*sc->sc_fpstate) : "memory");
590 }
591
592 if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
593 fpu_version = sc->sc_fpstate[0];
594 if (CPU_IS_020_OR_030 &&
595 regs->vector >= (VEC_FPBRUC * 4) &&
596 regs->vector <= (VEC_FPNAN * 4)) {
597 /* Clear pending exception in 68882 idle frame */
598 if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
599 sc->sc_fpstate[0x38] |= 1 << 3;
600 }
601
602 if (CPU_IS_COLDFIRE) {
603 __asm__ volatile ("fmovemd %%fp0-%%fp1,%0\n\t"
604 "fmovel %%fpcr,%1\n\t"
605 "fmovel %%fpsr,%2\n\t"
606 "fmovel %%fpiar,%3"
607 : "=m" (sc->sc_fpregs[0]),
608 "=m" (sc->sc_fpcntl[0]),
609 "=m" (sc->sc_fpcntl[1]),
610 "=m" (sc->sc_fpcntl[2])
611 : /* no inputs */
612 : "memory");
613 } else {
614 __asm__ volatile (".chip 68k/68881\n\t"
615 "fmovemx %%fp0-%%fp1,%0\n\t"
616 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
617 ".chip 68k"
618 : "=m" (*sc->sc_fpregs),
619 "=m" (*sc->sc_fpcntl)
620 : /* no inputs */
621 : "memory");
622 }
623 }
624}
625
626static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
627{
628 unsigned char fpstate[FPCONTEXT_SIZE];
629 int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
630 int err = 0;
631
632 if (FPU_IS_EMU) {
633 /* save fpu control register */
634 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
635 current->thread.fpcntl, 12);
636 /* save all other fpu register */
637 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
638 current->thread.fp, 96);
639 return err;
640 }
641
642 if (CPU_IS_COLDFIRE) {
643 __asm__ volatile ("fsave %0" : : "m" (*fpstate) : "memory");
644 } else {
645 __asm__ volatile (".chip 68k/68881\n\t"
646 "fsave %0\n\t"
647 ".chip 68k"
648 : : "m" (*fpstate) : "memory");
649 }
650
651 err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
652 if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
653 fpregset_t fpregs;
654 if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
655 context_size = fpstate[1];
656 fpu_version = fpstate[0];
657 if (CPU_IS_020_OR_030 &&
658 regs->vector >= (VEC_FPBRUC * 4) &&
659 regs->vector <= (VEC_FPNAN * 4)) {
660 /* Clear pending exception in 68882 idle frame */
661 if (*(unsigned short *) fpstate == 0x1f38)
662 fpstate[0x38] |= 1 << 3;
663 }
664 if (CPU_IS_COLDFIRE) {
665 __asm__ volatile ("fmovemd %%fp0-%%fp7,%0\n\t"
666 "fmovel %%fpcr,%1\n\t"
667 "fmovel %%fpsr,%2\n\t"
668 "fmovel %%fpiar,%3"
669 : "=m" (fpregs.f_fpregs[0]),
670 "=m" (fpregs.f_fpcntl[0]),
671 "=m" (fpregs.f_fpcntl[1]),
672 "=m" (fpregs.f_fpcntl[2])
673 : /* no inputs */
674 : "memory");
675 } else {
676 __asm__ volatile (".chip 68k/68881\n\t"
677 "fmovemx %%fp0-%%fp7,%0\n\t"
678 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
679 ".chip 68k"
680 : "=m" (*fpregs.f_fpregs),
681 "=m" (*fpregs.f_fpcntl)
682 : /* no inputs */
683 : "memory");
684 }
685 err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
686 sizeof(fpregs));
687 }
688 if (context_size)
689 err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
690 context_size);
691 return err;
692}
693
694static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
695 unsigned long mask)
696{
697 sc->sc_mask = mask;
698 sc->sc_usp = rdusp();
699 sc->sc_d0 = regs->d0;
700 sc->sc_d1 = regs->d1;
701 sc->sc_a0 = regs->a0;
702 sc->sc_a1 = regs->a1;
703 sc->sc_sr = regs->sr;
704 sc->sc_pc = regs->pc;
705 sc->sc_formatvec = regs->format << 12 | regs->vector;
706 save_fpu_state(sc, regs);
707}
708
709static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
710{
711 struct switch_stack *sw = (struct switch_stack *)regs - 1;
712 greg_t __user *gregs = uc->uc_mcontext.gregs;
713 int err = 0;
714
715 err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
716 err |= __put_user(regs->d0, &gregs[0]);
717 err |= __put_user(regs->d1, &gregs[1]);
718 err |= __put_user(regs->d2, &gregs[2]);
719 err |= __put_user(regs->d3, &gregs[3]);
720 err |= __put_user(regs->d4, &gregs[4]);
721 err |= __put_user(regs->d5, &gregs[5]);
722 err |= __put_user(sw->d6, &gregs[6]);
723 err |= __put_user(sw->d7, &gregs[7]);
724 err |= __put_user(regs->a0, &gregs[8]);
725 err |= __put_user(regs->a1, &gregs[9]);
726 err |= __put_user(regs->a2, &gregs[10]);
727 err |= __put_user(sw->a3, &gregs[11]);
728 err |= __put_user(sw->a4, &gregs[12]);
729 err |= __put_user(sw->a5, &gregs[13]);
730 err |= __put_user(sw->a6, &gregs[14]);
731 err |= __put_user(rdusp(), &gregs[15]);
732 err |= __put_user(regs->pc, &gregs[16]);
733 err |= __put_user(regs->sr, &gregs[17]);
734 err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
735 err |= rt_save_fpu_state(uc, regs);
736 return err;
737}
738
739static inline void push_cache (unsigned long vaddr)
740{
741 /*
742 * Using the old cache_push_v() was really a big waste.
743 *
744 * What we are trying to do is to flush 8 bytes to ram.
745 * Flushing 2 cache lines of 16 bytes is much cheaper than
746 * flushing 1 or 2 pages, as previously done in
747 * cache_push_v().
748 * Jes
749 */
750 if (CPU_IS_040) {
751 unsigned long temp;
752
753 __asm__ __volatile__ (".chip 68040\n\t"
754 "nop\n\t"
755 "ptestr (%1)\n\t"
756 "movec %%mmusr,%0\n\t"
757 ".chip 68k"
758 : "=r" (temp)
759 : "a" (vaddr));
760
761 temp &= PAGE_MASK;
762 temp |= vaddr & ~PAGE_MASK;
763
764 __asm__ __volatile__ (".chip 68040\n\t"
765 "nop\n\t"
766 "cpushl %%bc,(%0)\n\t"
767 ".chip 68k"
768 : : "a" (temp));
769 }
770 else if (CPU_IS_060) {
771 unsigned long temp;
772 __asm__ __volatile__ (".chip 68060\n\t"
773 "plpar (%0)\n\t"
774 ".chip 68k"
775 : "=a" (temp)
776 : "0" (vaddr));
777 __asm__ __volatile__ (".chip 68060\n\t"
778 "cpushl %%bc,(%0)\n\t"
779 ".chip 68k"
780 : : "a" (temp));
781 } else if (!CPU_IS_COLDFIRE) {
782 /*
783 * 68030/68020 have no writeback cache;
784 * still need to clear icache.
785 * Note that vaddr is guaranteed to be long word aligned.
786 */
787 unsigned long temp;
788 asm volatile ("movec %%cacr,%0" : "=r" (temp));
789 temp += 4;
790 asm volatile ("movec %0,%%caar\n\t"
791 "movec %1,%%cacr"
792 : : "r" (vaddr), "r" (temp));
793 asm volatile ("movec %0,%%caar\n\t"
794 "movec %1,%%cacr"
795 : : "r" (vaddr + 4), "r" (temp));
796 }
797}
798
799static inline void __user *
800get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
801{
802 unsigned long usp;
803
804 /* Default to using normal stack. */
805 usp = rdusp();
806
807 /* This is the X/Open sanctioned signal stack switching. */
808 if (ka->sa.sa_flags & SA_ONSTACK) {
809 if (!sas_ss_flags(usp))
810 usp = current->sas_ss_sp + current->sas_ss_size;
811 }
812 return (void __user *)((usp - frame_size) & -8UL);
813}
814
815static int setup_frame (int sig, struct k_sigaction *ka,
816 sigset_t *set, struct pt_regs *regs)
817{
818 struct sigframe __user *frame;
819 int fsize = frame_extra_sizes[regs->format];
820 struct sigcontext context;
821 int err = 0;
822
823 if (fsize < 0) {
824#ifdef DEBUG
825 printk ("setup_frame: Unknown frame format %#x\n",
826 regs->format);
827#endif
828 goto give_sigsegv;
829 }
830
831 frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
832
833 if (fsize)
834 err |= copy_to_user (frame + 1, regs + 1, fsize);
835
836 err |= __put_user((current_thread_info()->exec_domain
837 && current_thread_info()->exec_domain->signal_invmap
838 && sig < 32
839 ? current_thread_info()->exec_domain->signal_invmap[sig]
840 : sig),
841 &frame->sig);
842
843 err |= __put_user(regs->vector, &frame->code);
844 err |= __put_user(&frame->sc, &frame->psc);
845
846 if (_NSIG_WORDS > 1)
847 err |= copy_to_user(frame->extramask, &set->sig[1],
848 sizeof(frame->extramask));
849
850 setup_sigcontext(&context, regs, set->sig[0]);
851 err |= copy_to_user (&frame->sc, &context, sizeof(context));
852
853 /* Set up to return from userspace. */
854 err |= __put_user(frame->retcode, &frame->pretcode);
855 /* moveq #,d0; trap #0 */
856 err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
857 (long __user *)(frame->retcode));
858
859 if (err)
860 goto give_sigsegv;
861
862 push_cache ((unsigned long) &frame->retcode);
863
864 /*
865 * Set up registers for signal handler. All the state we are about
866 * to destroy is successfully copied to sigframe.
867 */
868 wrusp ((unsigned long) frame);
869 regs->pc = (unsigned long) ka->sa.sa_handler;
870
871 /*
872 * This is subtle; if we build more than one sigframe, all but the
873 * first one will see frame format 0 and have fsize == 0, so we won't
874 * screw stkadj.
875 */
876 if (fsize)
877 regs->stkadj = fsize;
878
879 /* Prepare to skip over the extra stuff in the exception frame. */
880 if (regs->stkadj) {
881 struct pt_regs *tregs =
882 (struct pt_regs *)((ulong)regs + regs->stkadj);
883#ifdef DEBUG
884 printk("Performing stackadjust=%04x\n", regs->stkadj);
885#endif
886 /* This must be copied with decreasing addresses to
887 handle overlaps. */
888 tregs->vector = 0;
889 tregs->format = 0;
890 tregs->pc = regs->pc;
891 tregs->sr = regs->sr;
892 }
893 return 0;
894
895give_sigsegv:
896 force_sigsegv(sig, current);
897 return err;
898}
899
900static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
901 sigset_t *set, struct pt_regs *regs)
902{
903 struct rt_sigframe __user *frame;
904 int fsize = frame_extra_sizes[regs->format];
905 int err = 0;
906
907 if (fsize < 0) {
908#ifdef DEBUG
909 printk ("setup_frame: Unknown frame format %#x\n",
910 regs->format);
911#endif
912 goto give_sigsegv;
913 }
914
915 frame = get_sigframe(ka, regs, sizeof(*frame));
916
917 if (fsize)
918 err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
919
920 err |= __put_user((current_thread_info()->exec_domain
921 && current_thread_info()->exec_domain->signal_invmap
922 && sig < 32
923 ? current_thread_info()->exec_domain->signal_invmap[sig]
924 : sig),
925 &frame->sig);
926 err |= __put_user(&frame->info, &frame->pinfo);
927 err |= __put_user(&frame->uc, &frame->puc);
928 err |= copy_siginfo_to_user(&frame->info, info);
929
930 /* Create the ucontext. */
931 err |= __put_user(0, &frame->uc.uc_flags);
932 err |= __put_user(NULL, &frame->uc.uc_link);
933 err |= __put_user((void __user *)current->sas_ss_sp,
934 &frame->uc.uc_stack.ss_sp);
935 err |= __put_user(sas_ss_flags(rdusp()),
936 &frame->uc.uc_stack.ss_flags);
937 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
938 err |= rt_setup_ucontext(&frame->uc, regs);
939 err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
940
941 /* Set up to return from userspace. */
942 err |= __put_user(frame->retcode, &frame->pretcode);
943#ifdef __mcoldfire__
944 /* movel #__NR_rt_sigreturn,d0; trap #0 */
945 err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
946 err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
947 (long __user *)(frame->retcode + 4));
948#else
949 /* moveq #,d0; notb d0; trap #0 */
950 err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
951 (long __user *)(frame->retcode + 0));
952 err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
953#endif
954
955 if (err)
956 goto give_sigsegv;
957
958 push_cache ((unsigned long) &frame->retcode);
959
960 /*
961 * Set up registers for signal handler. All the state we are about
962 * to destroy is successfully copied to sigframe.
963 */
964 wrusp ((unsigned long) frame);
965 regs->pc = (unsigned long) ka->sa.sa_handler;
966
967 /*
968 * This is subtle; if we build more than one sigframe, all but the
969 * first one will see frame format 0 and have fsize == 0, so we won't
970 * screw stkadj.
971 */
972 if (fsize)
973 regs->stkadj = fsize;
974
975 /* Prepare to skip over the extra stuff in the exception frame. */
976 if (regs->stkadj) {
977 struct pt_regs *tregs =
978 (struct pt_regs *)((ulong)regs + regs->stkadj);
979#ifdef DEBUG
980 printk("Performing stackadjust=%04x\n", regs->stkadj);
981#endif
982 /* This must be copied with decreasing addresses to
983 handle overlaps. */
984 tregs->vector = 0;
985 tregs->format = 0;
986 tregs->pc = regs->pc;
987 tregs->sr = regs->sr;
988 }
989 return 0;
990
991give_sigsegv:
992 force_sigsegv(sig, current);
993 return err;
994}
995
996static inline void
997handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
998{
999 switch (regs->d0) {
1000 case -ERESTARTNOHAND:
1001 if (!has_handler)
1002 goto do_restart;
1003 regs->d0 = -EINTR;
1004 break;
1005
1006 case -ERESTART_RESTARTBLOCK:
1007 if (!has_handler) {
1008 regs->d0 = __NR_restart_syscall;
1009 regs->pc -= 2;
1010 break;
1011 }
1012 regs->d0 = -EINTR;
1013 break;
1014
1015 case -ERESTARTSYS:
1016 if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
1017 regs->d0 = -EINTR;
1018 break;
1019 }
1020 /* fallthrough */
1021 case -ERESTARTNOINTR:
1022 do_restart:
1023 regs->d0 = regs->orig_d0;
1024 regs->pc -= 2;
1025 break;
1026 }
1027}
1028
1029void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
1030{
1031 if (regs->orig_d0 < 0)
1032 return;
1033 switch (regs->d0) {
1034 case -ERESTARTNOHAND:
1035 case -ERESTARTSYS:
1036 case -ERESTARTNOINTR:
1037 regs->d0 = regs->orig_d0;
1038 regs->orig_d0 = -1;
1039 regs->pc -= 2;
1040 break;
1041 }
1042}
1043
1044/*
1045 * OK, we're invoking a handler
1046 */
1047static void
1048handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
1049 sigset_t *oldset, struct pt_regs *regs)
1050{
1051 int err;
1052 /* are we from a system call? */
1053 if (regs->orig_d0 >= 0)
1054 /* If so, check system call restarting.. */
1055 handle_restart(regs, ka, 1);
1056
1057 /* set up the stack frame */
1058 if (ka->sa.sa_flags & SA_SIGINFO)
1059 err = setup_rt_frame(sig, ka, info, oldset, regs);
1060 else
1061 err = setup_frame(sig, ka, oldset, regs);
1062
1063 if (err)
1064 return;
1065
1066 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
1067 if (!(ka->sa.sa_flags & SA_NODEFER))
1068 sigaddset(&current->blocked,sig);
1069 recalc_sigpending();
1070
1071 if (test_thread_flag(TIF_DELAYED_TRACE)) {
1072 regs->sr &= ~0x8000;
1073 send_sig(SIGTRAP, current, 1);
1074 }
1075
1076 clear_thread_flag(TIF_RESTORE_SIGMASK);
1077}
1078
1079/*
1080 * Note that 'init' is a special process: it doesn't get signals it doesn't
1081 * want to handle. Thus you cannot kill init even with a SIGKILL even by
1082 * mistake.
1083 */
1084asmlinkage void do_signal(struct pt_regs *regs)
1085{
1086 siginfo_t info;
1087 struct k_sigaction ka;
1088 int signr;
1089 sigset_t *oldset;
1090
1091 current->thread.esp0 = (unsigned long) regs;
1092
1093 if (test_thread_flag(TIF_RESTORE_SIGMASK))
1094 oldset = &current->saved_sigmask;
1095 else
1096 oldset = &current->blocked;
1097
1098 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
1099 if (signr > 0) {
1100 /* Whee! Actually deliver the signal. */
1101 handle_signal(signr, &ka, &info, oldset, regs);
1102 return;
1103 }
1104
1105 /* Did we come from a system call? */
1106 if (regs->orig_d0 >= 0)
1107 /* Restart the system call - no handlers present */
1108 handle_restart(regs, NULL, 0);
1109
1110 /* If there's no signal to deliver, we just restore the saved mask. */
1111 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
1112 clear_thread_flag(TIF_RESTORE_SIGMASK);
1113 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
1114 }
1115}
diff --git a/arch/m68k/kernel/signal_no.c b/arch/m68k/kernel/signal_no.c
deleted file mode 100644
index 36a81bb6835a..000000000000
--- a/arch/m68k/kernel/signal_no.c
+++ /dev/null
@@ -1,765 +0,0 @@
1/*
2 * linux/arch/m68knommu/kernel/signal.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
8 * for more details.
9 */
10
11/*
12 * Linux/m68k support by Hamish Macdonald
13 *
14 * 68060 fixes by Jesper Skov
15 *
16 * 1997-12-01 Modified for POSIX.1b signals by Andreas Schwab
17 *
18 * mathemu support by Roman Zippel
19 * (Note: fpstate in the signal context is completely ignored for the emulator
20 * and the internal floating point format is put on stack)
21 */
22
23/*
24 * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
25 * Atari :-) Current limitation: Only one sigstack can be active at one time.
26 * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
27 * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
28 * signal handlers!
29 */
30
31#include <linux/sched.h>
32#include <linux/mm.h>
33#include <linux/kernel.h>
34#include <linux/signal.h>
35#include <linux/syscalls.h>
36#include <linux/errno.h>
37#include <linux/wait.h>
38#include <linux/ptrace.h>
39#include <linux/unistd.h>
40#include <linux/stddef.h>
41#include <linux/highuid.h>
42#include <linux/tty.h>
43#include <linux/personality.h>
44#include <linux/binfmts.h>
45
46#include <asm/setup.h>
47#include <asm/uaccess.h>
48#include <asm/pgtable.h>
49#include <asm/traps.h>
50#include <asm/ucontext.h>
51
52#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
53
54void ret_from_user_signal(void);
55void ret_from_user_rt_signal(void);
56
57/*
58 * Atomically swap in the new signal mask, and wait for a signal.
59 */
60asmlinkage int
61sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
62{
63 mask &= _BLOCKABLE;
64 spin_lock_irq(&current->sighand->siglock);
65 current->saved_sigmask = current->blocked;
66 siginitset(&current->blocked, mask);
67 recalc_sigpending();
68 spin_unlock_irq(&current->sighand->siglock);
69
70 current->state = TASK_INTERRUPTIBLE;
71 schedule();
72 set_restore_sigmask();
73
74 return -ERESTARTNOHAND;
75}
76
77asmlinkage int
78sys_sigaction(int sig, const struct old_sigaction __user *act,
79 struct old_sigaction __user *oact)
80{
81 struct k_sigaction new_ka, old_ka;
82 int ret;
83
84 if (act) {
85 old_sigset_t mask;
86 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
87 __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
88 __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
89 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
90 __get_user(mask, &act->sa_mask))
91 return -EFAULT;
92 siginitset(&new_ka.sa.sa_mask, mask);
93 }
94
95 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
96
97 if (!ret && oact) {
98 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
99 __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
100 __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
101 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
102 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
103 return -EFAULT;
104 }
105
106 return ret;
107}
108
109asmlinkage int
110sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
111{
112 return do_sigaltstack(uss, uoss, rdusp());
113}
114
115
116/*
117 * Do a signal return; undo the signal stack.
118 *
119 * Keep the return code on the stack quadword aligned!
120 * That makes the cache flush below easier.
121 */
122
123struct sigframe
124{
125 char __user *pretcode;
126 int sig;
127 int code;
128 struct sigcontext __user *psc;
129 char retcode[8];
130 unsigned long extramask[_NSIG_WORDS-1];
131 struct sigcontext sc;
132};
133
134struct rt_sigframe
135{
136 char __user *pretcode;
137 int sig;
138 struct siginfo __user *pinfo;
139 void __user *puc;
140 char retcode[8];
141 struct siginfo info;
142 struct ucontext uc;
143};
144
145#ifdef CONFIG_FPU
146
147static unsigned char fpu_version = 0; /* version number of fpu, set by setup_frame */
148
149static inline int restore_fpu_state(struct sigcontext *sc)
150{
151 int err = 1;
152
153 if (FPU_IS_EMU) {
154 /* restore registers */
155 memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
156 memcpy(current->thread.fp, sc->sc_fpregs, 24);
157 return 0;
158 }
159
160 if (sc->sc_fpstate[0]) {
161 /* Verify the frame format. */
162 if (sc->sc_fpstate[0] != fpu_version)
163 goto out;
164
165 __asm__ volatile (".chip 68k/68881\n\t"
166 "fmovemx %0,%%fp0-%%fp1\n\t"
167 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
168 ".chip 68k"
169 : /* no outputs */
170 : "m" (*sc->sc_fpregs), "m" (*sc->sc_fpcntl));
171 }
172 __asm__ volatile (".chip 68k/68881\n\t"
173 "frestore %0\n\t"
174 ".chip 68k" : : "m" (*sc->sc_fpstate));
175 err = 0;
176
177out:
178 return err;
179}
180
181#define FPCONTEXT_SIZE 216
182#define uc_fpstate uc_filler[0]
183#define uc_formatvec uc_filler[FPCONTEXT_SIZE/4]
184#define uc_extra uc_filler[FPCONTEXT_SIZE/4+1]
185
186static inline int rt_restore_fpu_state(struct ucontext __user *uc)
187{
188 unsigned char fpstate[FPCONTEXT_SIZE];
189 int context_size = 0;
190 fpregset_t fpregs;
191 int err = 1;
192
193 if (FPU_IS_EMU) {
194 /* restore fpu control register */
195 if (__copy_from_user(current->thread.fpcntl,
196 uc->uc_mcontext.fpregs.f_fpcntl, 12))
197 goto out;
198 /* restore all other fpu register */
199 if (__copy_from_user(current->thread.fp,
200 uc->uc_mcontext.fpregs.f_fpregs, 96))
201 goto out;
202 return 0;
203 }
204
205 if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
206 goto out;
207 if (fpstate[0]) {
208 context_size = fpstate[1];
209
210 /* Verify the frame format. */
211 if (fpstate[0] != fpu_version)
212 goto out;
213 if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
214 sizeof(fpregs)))
215 goto out;
216 __asm__ volatile (".chip 68k/68881\n\t"
217 "fmovemx %0,%%fp0-%%fp7\n\t"
218 "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
219 ".chip 68k"
220 : /* no outputs */
221 : "m" (*fpregs.f_fpregs),
222 "m" (*fpregs.f_fpcntl));
223 }
224 if (context_size &&
225 __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
226 context_size))
227 goto out;
228 __asm__ volatile (".chip 68k/68881\n\t"
229 "frestore %0\n\t"
230 ".chip 68k" : : "m" (*fpstate));
231 err = 0;
232
233out:
234 return err;
235}
236
237#endif
238
239static inline int
240restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp,
241 int *pd0)
242{
243 int formatvec;
244 struct sigcontext context;
245 int err = 0;
246
247 /* Always make any pending restarted system calls return -EINTR */
248 current_thread_info()->restart_block.fn = do_no_restart_syscall;
249
250 /* get previous context */
251 if (copy_from_user(&context, usc, sizeof(context)))
252 goto badframe;
253
254 /* restore passed registers */
255 regs->d1 = context.sc_d1;
256 regs->a0 = context.sc_a0;
257 regs->a1 = context.sc_a1;
258 ((struct switch_stack *)regs - 1)->a5 = context.sc_a5;
259 regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
260 regs->pc = context.sc_pc;
261 regs->orig_d0 = -1; /* disable syscall checks */
262 wrusp(context.sc_usp);
263 formatvec = context.sc_formatvec;
264 regs->format = formatvec >> 12;
265 regs->vector = formatvec & 0xfff;
266
267#ifdef CONFIG_FPU
268 err = restore_fpu_state(&context);
269#endif
270
271 *pd0 = context.sc_d0;
272 return err;
273
274badframe:
275 return 1;
276}
277
278static inline int
279rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
280 struct ucontext __user *uc, int *pd0)
281{
282 int temp;
283 greg_t __user *gregs = uc->uc_mcontext.gregs;
284 unsigned long usp;
285 int err;
286
287 /* Always make any pending restarted system calls return -EINTR */
288 current_thread_info()->restart_block.fn = do_no_restart_syscall;
289
290 err = __get_user(temp, &uc->uc_mcontext.version);
291 if (temp != MCONTEXT_VERSION)
292 goto badframe;
293 /* restore passed registers */
294 err |= __get_user(regs->d0, &gregs[0]);
295 err |= __get_user(regs->d1, &gregs[1]);
296 err |= __get_user(regs->d2, &gregs[2]);
297 err |= __get_user(regs->d3, &gregs[3]);
298 err |= __get_user(regs->d4, &gregs[4]);
299 err |= __get_user(regs->d5, &gregs[5]);
300 err |= __get_user(sw->d6, &gregs[6]);
301 err |= __get_user(sw->d7, &gregs[7]);
302 err |= __get_user(regs->a0, &gregs[8]);
303 err |= __get_user(regs->a1, &gregs[9]);
304 err |= __get_user(regs->a2, &gregs[10]);
305 err |= __get_user(sw->a3, &gregs[11]);
306 err |= __get_user(sw->a4, &gregs[12]);
307 err |= __get_user(sw->a5, &gregs[13]);
308 err |= __get_user(sw->a6, &gregs[14]);
309 err |= __get_user(usp, &gregs[15]);
310 wrusp(usp);
311 err |= __get_user(regs->pc, &gregs[16]);
312 err |= __get_user(temp, &gregs[17]);
313 regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
314 regs->orig_d0 = -1; /* disable syscall checks */
315 regs->format = temp >> 12;
316 regs->vector = temp & 0xfff;
317
318 if (do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
319 goto badframe;
320
321 *pd0 = regs->d0;
322 return err;
323
324badframe:
325 return 1;
326}
327
328asmlinkage int do_sigreturn(unsigned long __unused)
329{
330 struct switch_stack *sw = (struct switch_stack *) &__unused;
331 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
332 unsigned long usp = rdusp();
333 struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
334 sigset_t set;
335 int d0;
336
337 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
338 goto badframe;
339 if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
340 (_NSIG_WORDS > 1 &&
341 __copy_from_user(&set.sig[1], &frame->extramask,
342 sizeof(frame->extramask))))
343 goto badframe;
344
345 sigdelsetmask(&set, ~_BLOCKABLE);
346 spin_lock_irq(&current->sighand->siglock);
347 current->blocked = set;
348 recalc_sigpending();
349 spin_unlock_irq(&current->sighand->siglock);
350
351 if (restore_sigcontext(regs, &frame->sc, frame + 1, &d0))
352 goto badframe;
353 return d0;
354
355badframe:
356 force_sig(SIGSEGV, current);
357 return 0;
358}
359
360asmlinkage int do_rt_sigreturn(unsigned long __unused)
361{
362 struct switch_stack *sw = (struct switch_stack *) &__unused;
363 struct pt_regs *regs = (struct pt_regs *) (sw + 1);
364 unsigned long usp = rdusp();
365 struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
366 sigset_t set;
367 int d0;
368
369 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
370 goto badframe;
371 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
372 goto badframe;
373
374 sigdelsetmask(&set, ~_BLOCKABLE);
375 spin_lock_irq(&current->sighand->siglock);
376 current->blocked = set;
377 recalc_sigpending();
378 spin_unlock_irq(&current->sighand->siglock);
379
380 if (rt_restore_ucontext(regs, sw, &frame->uc, &d0))
381 goto badframe;
382 return d0;
383
384badframe:
385 force_sig(SIGSEGV, current);
386 return 0;
387}
388
389#ifdef CONFIG_FPU
390/*
391 * Set up a signal frame.
392 */
393
394static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
395{
396 if (FPU_IS_EMU) {
397 /* save registers */
398 memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
399 memcpy(sc->sc_fpregs, current->thread.fp, 24);
400 return;
401 }
402
403 __asm__ volatile (".chip 68k/68881\n\t"
404 "fsave %0\n\t"
405 ".chip 68k"
406 : : "m" (*sc->sc_fpstate) : "memory");
407
408 if (sc->sc_fpstate[0]) {
409 fpu_version = sc->sc_fpstate[0];
410 __asm__ volatile (".chip 68k/68881\n\t"
411 "fmovemx %%fp0-%%fp1,%0\n\t"
412 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
413 ".chip 68k"
414 : "=m" (*sc->sc_fpregs),
415 "=m" (*sc->sc_fpcntl)
416 : /* no inputs */
417 : "memory");
418 }
419}
420
421static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
422{
423 unsigned char fpstate[FPCONTEXT_SIZE];
424 int context_size = 0;
425 int err = 0;
426
427 if (FPU_IS_EMU) {
428 /* save fpu control register */
429 err |= copy_to_user(uc->uc_mcontext.fpregs.f_pcntl,
430 current->thread.fpcntl, 12);
431 /* save all other fpu register */
432 err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
433 current->thread.fp, 96);
434 return err;
435 }
436
437 __asm__ volatile (".chip 68k/68881\n\t"
438 "fsave %0\n\t"
439 ".chip 68k"
440 : : "m" (*fpstate) : "memory");
441
442 err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
443 if (fpstate[0]) {
444 fpregset_t fpregs;
445 context_size = fpstate[1];
446 fpu_version = fpstate[0];
447 __asm__ volatile (".chip 68k/68881\n\t"
448 "fmovemx %%fp0-%%fp7,%0\n\t"
449 "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
450 ".chip 68k"
451 : "=m" (*fpregs.f_fpregs),
452 "=m" (*fpregs.f_fpcntl)
453 : /* no inputs */
454 : "memory");
455 err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
456 sizeof(fpregs));
457 }
458 if (context_size)
459 err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
460 context_size);
461 return err;
462}
463
464#endif
465
466static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
467 unsigned long mask)
468{
469 sc->sc_mask = mask;
470 sc->sc_usp = rdusp();
471 sc->sc_d0 = regs->d0;
472 sc->sc_d1 = regs->d1;
473 sc->sc_a0 = regs->a0;
474 sc->sc_a1 = regs->a1;
475 sc->sc_a5 = ((struct switch_stack *)regs - 1)->a5;
476 sc->sc_sr = regs->sr;
477 sc->sc_pc = regs->pc;
478 sc->sc_formatvec = regs->format << 12 | regs->vector;
479#ifdef CONFIG_FPU
480 save_fpu_state(sc, regs);
481#endif
482}
483
484static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
485{
486 struct switch_stack *sw = (struct switch_stack *)regs - 1;
487 greg_t __user *gregs = uc->uc_mcontext.gregs;
488 int err = 0;
489
490 err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
491 err |= __put_user(regs->d0, &gregs[0]);
492 err |= __put_user(regs->d1, &gregs[1]);
493 err |= __put_user(regs->d2, &gregs[2]);
494 err |= __put_user(regs->d3, &gregs[3]);
495 err |= __put_user(regs->d4, &gregs[4]);
496 err |= __put_user(regs->d5, &gregs[5]);
497 err |= __put_user(sw->d6, &gregs[6]);
498 err |= __put_user(sw->d7, &gregs[7]);
499 err |= __put_user(regs->a0, &gregs[8]);
500 err |= __put_user(regs->a1, &gregs[9]);
501 err |= __put_user(regs->a2, &gregs[10]);
502 err |= __put_user(sw->a3, &gregs[11]);
503 err |= __put_user(sw->a4, &gregs[12]);
504 err |= __put_user(sw->a5, &gregs[13]);
505 err |= __put_user(sw->a6, &gregs[14]);
506 err |= __put_user(rdusp(), &gregs[15]);
507 err |= __put_user(regs->pc, &gregs[16]);
508 err |= __put_user(regs->sr, &gregs[17]);
509#ifdef CONFIG_FPU
510 err |= rt_save_fpu_state(uc, regs);
511#endif
512 return err;
513}
514
515static inline void __user *
516get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
517{
518 unsigned long usp;
519
520 /* Default to using normal stack. */
521 usp = rdusp();
522
523 /* This is the X/Open sanctioned signal stack switching. */
524 if (ka->sa.sa_flags & SA_ONSTACK) {
525 if (!sas_ss_flags(usp))
526 usp = current->sas_ss_sp + current->sas_ss_size;
527 }
528 return (void __user *)((usp - frame_size) & -8UL);
529}
530
531static int setup_frame (int sig, struct k_sigaction *ka,
532 sigset_t *set, struct pt_regs *regs)
533{
534 struct sigframe __user *frame;
535 struct sigcontext context;
536 int err = 0;
537
538 frame = get_sigframe(ka, regs, sizeof(*frame));
539
540 err |= __put_user((current_thread_info()->exec_domain
541 && current_thread_info()->exec_domain->signal_invmap
542 && sig < 32
543 ? current_thread_info()->exec_domain->signal_invmap[sig]
544 : sig),
545 &frame->sig);
546
547 err |= __put_user(regs->vector, &frame->code);
548 err |= __put_user(&frame->sc, &frame->psc);
549
550 if (_NSIG_WORDS > 1)
551 err |= copy_to_user(frame->extramask, &set->sig[1],
552 sizeof(frame->extramask));
553
554 setup_sigcontext(&context, regs, set->sig[0]);
555 err |= copy_to_user (&frame->sc, &context, sizeof(context));
556
557 /* Set up to return from userspace. */
558 err |= __put_user((void *) ret_from_user_signal, &frame->pretcode);
559
560 if (err)
561 goto give_sigsegv;
562
563 /* Set up registers for signal handler */
564 wrusp ((unsigned long) frame);
565 regs->pc = (unsigned long) ka->sa.sa_handler;
566 ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data;
567 regs->format = 0x4; /*set format byte to make stack appear modulo 4
568 which it will be when doing the rte */
569
570adjust_stack:
571 /* Prepare to skip over the extra stuff in the exception frame. */
572 if (regs->stkadj) {
573 struct pt_regs *tregs =
574 (struct pt_regs *)((ulong)regs + regs->stkadj);
575#if defined(DEBUG)
576 printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj);
577#endif
578 /* This must be copied with decreasing addresses to
579 handle overlaps. */
580 tregs->vector = 0;
581 tregs->format = 0;
582 tregs->pc = regs->pc;
583 tregs->sr = regs->sr;
584 }
585 return err;
586
587give_sigsegv:
588 force_sigsegv(sig, current);
589 goto adjust_stack;
590}
591
592static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
593 sigset_t *set, struct pt_regs *regs)
594{
595 struct rt_sigframe __user *frame;
596 int err = 0;
597
598 frame = get_sigframe(ka, regs, sizeof(*frame));
599
600 err |= __put_user((current_thread_info()->exec_domain
601 && current_thread_info()->exec_domain->signal_invmap
602 && sig < 32
603 ? current_thread_info()->exec_domain->signal_invmap[sig]
604 : sig),
605 &frame->sig);
606 err |= __put_user(&frame->info, &frame->pinfo);
607 err |= __put_user(&frame->uc, &frame->puc);
608 err |= copy_siginfo_to_user(&frame->info, info);
609
610 /* Create the ucontext. */
611 err |= __put_user(0, &frame->uc.uc_flags);
612 err |= __put_user(NULL, &frame->uc.uc_link);
613 err |= __put_user((void __user *)current->sas_ss_sp,
614 &frame->uc.uc_stack.ss_sp);
615 err |= __put_user(sas_ss_flags(rdusp()),
616 &frame->uc.uc_stack.ss_flags);
617 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
618 err |= rt_setup_ucontext(&frame->uc, regs);
619 err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
620
621 /* Set up to return from userspace. */
622 err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode);
623
624 if (err)
625 goto give_sigsegv;
626
627 /* Set up registers for signal handler */
628 wrusp ((unsigned long) frame);
629 regs->pc = (unsigned long) ka->sa.sa_handler;
630 ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data;
631 regs->format = 0x4; /*set format byte to make stack appear modulo 4
632 which it will be when doing the rte */
633
634adjust_stack:
635 /* Prepare to skip over the extra stuff in the exception frame. */
636 if (regs->stkadj) {
637 struct pt_regs *tregs =
638 (struct pt_regs *)((ulong)regs + regs->stkadj);
639#if defined(DEBUG)
640 printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj);
641#endif
642 /* This must be copied with decreasing addresses to
643 handle overlaps. */
644 tregs->vector = 0;
645 tregs->format = 0;
646 tregs->pc = regs->pc;
647 tregs->sr = regs->sr;
648 }
649 return err;
650
651give_sigsegv:
652 force_sigsegv(sig, current);
653 goto adjust_stack;
654}
655
656static inline void
657handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
658{
659 switch (regs->d0) {
660 case -ERESTARTNOHAND:
661 if (!has_handler)
662 goto do_restart;
663 regs->d0 = -EINTR;
664 break;
665
666 case -ERESTART_RESTARTBLOCK:
667 if (!has_handler) {
668 regs->d0 = __NR_restart_syscall;
669 regs->pc -= 2;
670 break;
671 }
672 regs->d0 = -EINTR;
673 break;
674
675 case -ERESTARTSYS:
676 if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
677 regs->d0 = -EINTR;
678 break;
679 }
680 /* fallthrough */
681 case -ERESTARTNOINTR:
682 do_restart:
683 regs->d0 = regs->orig_d0;
684 regs->pc -= 2;
685 break;
686 }
687}
688
689/*
690 * OK, we're invoking a handler
691 */
692static void
693handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
694 sigset_t *oldset, struct pt_regs *regs)
695{
696 int err;
697 /* are we from a system call? */
698 if (regs->orig_d0 >= 0)
699 /* If so, check system call restarting.. */
700 handle_restart(regs, ka, 1);
701
702 /* set up the stack frame */
703 if (ka->sa.sa_flags & SA_SIGINFO)
704 err = setup_rt_frame(sig, ka, info, oldset, regs);
705 else
706 err = setup_frame(sig, ka, oldset, regs);
707
708 if (err)
709 return;
710
711 spin_lock_irq(&current->sighand->siglock);
712 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
713 if (!(ka->sa.sa_flags & SA_NODEFER))
714 sigaddset(&current->blocked,sig);
715 recalc_sigpending();
716 spin_unlock_irq(&current->sighand->siglock);
717
718 clear_thread_flag(TIF_RESTORE_SIGMASK);
719}
720
721/*
722 * Note that 'init' is a special process: it doesn't get signals it doesn't
723 * want to handle. Thus you cannot kill init even with a SIGKILL even by
724 * mistake.
725 */
726asmlinkage void do_signal(struct pt_regs *regs)
727{
728 struct k_sigaction ka;
729 siginfo_t info;
730 int signr;
731 sigset_t *oldset;
732
733 /*
734 * We want the common case to go fast, which
735 * is why we may in certain cases get here from
736 * kernel mode. Just return without doing anything
737 * if so.
738 */
739 if (!user_mode(regs))
740 return;
741
742 if (test_thread_flag(TIF_RESTORE_SIGMASK))
743 oldset = &current->saved_sigmask;
744 else
745 oldset = &current->blocked;
746
747 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
748 if (signr > 0) {
749 /* Whee! Actually deliver the signal. */
750 handle_signal(signr, &ka, &info, oldset, regs);
751 return;
752 }
753
754 /* Did we come from a system call? */
755 if (regs->orig_d0 >= 0) {
756 /* Restart the system call - no handlers present */
757 handle_restart(regs, NULL, 0);
758 }
759
760 /* If there's no signal to deliver, we just restore the saved mask. */
761 if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
762 clear_thread_flag(TIF_RESTORE_SIGMASK);
763 sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
764 }
765}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-31 15:24:42 -0500