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Import 2.3.40pre5
[davej-history.git] / arch / sparc64 / kernel / signal32.c
blobf0e512666532880ba91246f84ce143826f7f4365
1 /* $Id: signal32.c,v 1.58 2000/01/14 09:40:08 jj Exp $
2 * arch/sparc64/kernel/signal32.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 */
10
11 #include <linux/sched.h>
12 #include <linux/kernel.h>
13 #include <linux/signal.h>
14 #include <linux/errno.h>
15 #include <linux/wait.h>
16 #include <linux/ptrace.h>
17 #include <linux/unistd.h>
18 #include <linux/mm.h>
19 #include <linux/smp_lock.h>
20
21 #include <asm/uaccess.h>
22 #include <asm/bitops.h>
23 #include <asm/ptrace.h>
24 #include <asm/svr4.h>
25 #include <asm/pgtable.h>
26 #include <asm/psrcompat.h>
27 #include <asm/fpumacro.h>
28 #include <asm/visasm.h>
29
30 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
31
32 asmlinkage int sys_wait4(pid_t pid, unsigned long *stat_addr,
33 int options, unsigned long *ru);
34
35 asmlinkage int do_signal32(sigset_t *oldset, struct pt_regs *regs,
36 unsigned long orig_o0, int ret_from_syscall);
37
38 /* This turned off for production... */
39 /* #define DEBUG_SIGNALS 1 */
40 /* #define DEBUG_SIGNALS_TRACE 1 */
41 /* #define DEBUG_SIGNALS_MAPS 1 */
42 /* #define DEBUG_SIGNALS_TLB 1 */
43
44 /* Signal frames: the original one (compatible with SunOS):
45 *
46 * Set up a signal frame... Make the stack look the way SunOS
47 * expects it to look which is basically:
48 *
49 * ---------------------------------- <-- %sp at signal time
50 * Struct sigcontext
51 * Signal address
52 * Ptr to sigcontext area above
53 * Signal code
54 * The signal number itself
55 * One register window
56 * ---------------------------------- <-- New %sp
57 */
58 struct signal_sframe32 {
59 struct reg_window32 sig_window;
60 int sig_num;
61 int sig_code;
62 /* struct sigcontext32 * */ u32 sig_scptr;
63 int sig_address;
64 struct sigcontext32 sig_context;
65 unsigned extramask[_NSIG_WORDS32 - 1];
66 };
67
68 /*
69 * And the new one, intended to be used for Linux applications only
70 * (we have enough in there to work with clone).
71 * All the interesting bits are in the info field.
72 */
73 struct new_signal_frame32 {
74 struct sparc_stackf32 ss;
75 __siginfo32_t info;
76 /* __siginfo_fpu32_t * */ u32 fpu_save;
77 unsigned int insns [2];
78 unsigned extramask[_NSIG_WORDS32 - 1];
79 unsigned extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
80 /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
81 siginfo_extra_v8plus_t v8plus;
82 __siginfo_fpu_t fpu_state;
83 };
84
85 struct rt_signal_frame32 {
86 struct sparc_stackf32 ss;
87 siginfo_t32 info;
88 struct pt_regs32 regs;
89 sigset_t32 mask;
90 /* __siginfo_fpu32_t * */ u32 fpu_save;
91 unsigned int insns [2];
92 stack_t32 stack;
93 unsigned extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
94 /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
95 siginfo_extra_v8plus_t v8plus;
96 __siginfo_fpu_t fpu_state;
97 };
98
99 /* Align macros */
100 #define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7)))
101 #define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7)))
102 #define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7)))
103
104 /*
105 * atomically swap in the new signal mask, and wait for a signal.
106 * This is really tricky on the Sparc, watch out...
107 */
108 asmlinkage void _sigpause32_common(old_sigset_t32 set, struct pt_regs *regs)
109 {
110 sigset_t saveset;
111
112 set &= _BLOCKABLE;
113 spin_lock_irq(&current->sigmask_lock);
114 saveset = current->blocked;
115 siginitset(&current->blocked, set);
116 recalc_sigpending(current);
117 spin_unlock_irq(&current->sigmask_lock);
118
119 regs->tpc = regs->tnpc;
120 regs->tnpc += 4;
121
122 /* Condition codes and return value where set here for sigpause,
123 * and so got used by setup_frame, which again causes sigreturn()
124 * to return -EINTR.
125 */
126 while (1) {
127 current->state = TASK_INTERRUPTIBLE;
128 schedule();
129 /*
130 * Return -EINTR and set condition code here,
131 * so the interrupted system call actually returns
132 * these.
133 */
134 regs->tstate |= TSTATE_ICARRY;
135 regs->u_regs[UREG_I0] = EINTR;
136 if (do_signal32(&saveset, regs, 0, 0))
137 return;
138 }
139 }
140
141 asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs)
142 {
143 sigset_t oldset, set;
144 sigset_t32 set32;
145
146 /* XXX: Don't preclude handling different sized sigset_t's. */
147 if (((__kernel_size_t32)sigsetsize) != sizeof(sigset_t)) {
148 regs->tstate |= TSTATE_ICARRY;
149 regs->u_regs[UREG_I0] = EINVAL;
150 return;
151 }
152 if (copy_from_user(&set32, (void *)(long)uset, sizeof(set32))) {
153 regs->tstate |= TSTATE_ICARRY;
154 regs->u_regs[UREG_I0] = EFAULT;
155 return;
156 }
157 switch (_NSIG_WORDS) {
158 case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
159 case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
160 case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
161 case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
162 }
163 sigdelsetmask(&set, ~_BLOCKABLE);
164 spin_lock_irq(&current->sigmask_lock);
165 oldset = current->blocked;
166 current->blocked = set;
167 recalc_sigpending(current);
168 spin_unlock_irq(&current->sigmask_lock);
169
170 regs->tpc = regs->tnpc;
171 regs->tnpc += 4;
172
173 /* Condition codes and return value where set here for sigpause,
174 * and so got used by setup_frame, which again causes sigreturn()
175 * to return -EINTR.
176 */
177 while (1) {
178 current->state = TASK_INTERRUPTIBLE;
179 schedule();
180 /*
181 * Return -EINTR and set condition code here,
182 * so the interrupted system call actually returns
183 * these.
184 */
185 regs->tstate |= TSTATE_ICARRY;
186 regs->u_regs[UREG_I0] = EINTR;
187 if (do_signal32(&oldset, regs, 0, 0))
188 return;
189 }
190 }
191
192 static inline int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t *fpu)
193 {
194 unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
195 unsigned long fprs;
196 int err;
197
198 err = __get_user(fprs, &fpu->si_fprs);
199 fprs_write(0);
200 regs->tstate &= ~TSTATE_PEF;
201 if (fprs & FPRS_DL)
202 err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
203 if (fprs & FPRS_DU)
204 err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
205 err |= __get_user(current->thread.xfsr[0], &fpu->si_fsr);
206 err |= __get_user(current->thread.gsr[0], &fpu->si_gsr);
207 current->thread.fpsaved[0] |= fprs;
208 return err;
209 }
210
211 void do_new_sigreturn32(struct pt_regs *regs)
212 {
213 struct new_signal_frame32 *sf;
214 unsigned int psr;
215 unsigned pc, npc, fpu_save;
216 sigset_t set;
217 unsigned seta[_NSIG_WORDS32];
218 int err, i;
219
220 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
221 sf = (struct new_signal_frame32 *) regs->u_regs [UREG_FP];
222
223 /* 1. Make sure we are not getting garbage from the user */
224 if (verify_area (VERIFY_READ, sf, sizeof (*sf)) ||
225 (((unsigned long) sf) & 3))
226 goto segv;
227
228 get_user(pc, &sf->info.si_regs.pc);
229 __get_user(npc, &sf->info.si_regs.npc);
230
231 if ((pc | npc) & 3)
232 goto segv;
233
234 regs->tpc = pc;
235 regs->tnpc = npc;
236
237 /* 2. Restore the state */
238 err = __get_user(regs->y, &sf->info.si_regs.y);
239 err |= __get_user(psr, &sf->info.si_regs.psr);
240
241 for (i = UREG_G1; i <= UREG_I7; i++)
242 err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
243 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
244 err |= __get_user(i, &sf->v8plus.g_upper[0]);
245 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
246 for (i = UREG_G1; i <= UREG_I7; i++)
247 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
248 }
249 }
250
251 /* User can only change condition codes in %tstate. */
252 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
253 regs->tstate |= psr_to_tstate_icc(psr);
254
255 err |= __get_user(fpu_save, &sf->fpu_save);
256 if (fpu_save)
257 err |= restore_fpu_state32(regs, &sf->fpu_state);
258 err |= __get_user(seta[0], &sf->info.si_mask);
259 err |= copy_from_user(seta+1, &sf->extramask, (_NSIG_WORDS32 - 1) * sizeof(unsigned));
260 if (err)
261 goto segv;
262 switch (_NSIG_WORDS) {
263 case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
264 case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
265 case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
266 case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
267 }
268 sigdelsetmask(&set, ~_BLOCKABLE);
269 spin_lock_irq(&current->sigmask_lock);
270 current->blocked = set;
271 recalc_sigpending(current);
272 spin_unlock_irq(&current->sigmask_lock);
273 return;
274
275 segv:
276 do_exit(SIGSEGV);
277 }
278
279 asmlinkage void do_sigreturn32(struct pt_regs *regs)
280 {
281 struct sigcontext32 *scptr;
282 unsigned pc, npc, psr;
283 sigset_t set;
284 unsigned seta[_NSIG_WORDS32];
285 int err;
286
287 synchronize_user_stack();
288 if (current->thread.flags & SPARC_FLAG_NEWSIGNALS)
289 return do_new_sigreturn32(regs);
290
291 scptr = (struct sigcontext32 *)
292 (regs->u_regs[UREG_I0] & 0x00000000ffffffffUL);
293 /* Check sanity of the user arg. */
294 if(verify_area(VERIFY_READ, scptr, sizeof(struct sigcontext32)) ||
295 (((unsigned long) scptr) & 3))
296 goto segv;
297
298 err = __get_user(pc, &scptr->sigc_pc);
299 err |= __get_user(npc, &scptr->sigc_npc);
300
301 if((pc | npc) & 3)
302 goto segv; /* Nice try. */
303
304 err |= __get_user(seta[0], &scptr->sigc_mask);
305 /* Note that scptr + 1 points to extramask */
306 err |= copy_from_user(seta+1, scptr + 1, (_NSIG_WORDS32 - 1) * sizeof(unsigned));
307 if (err)
308 goto segv;
309 switch (_NSIG_WORDS) {
310 case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
311 case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
312 case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
313 case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
314 }
315 sigdelsetmask(&set, ~_BLOCKABLE);
316 spin_lock_irq(&current->sigmask_lock);
317 current->blocked = set;
318 recalc_sigpending(current);
319 spin_unlock_irq(&current->sigmask_lock);
320
321 regs->tpc = pc;
322 regs->tnpc = npc;
323 err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
324 err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
325 err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
326
327 /* User can only change condition codes in %tstate. */
328 err |= __get_user(psr, &scptr->sigc_psr);
329 if (err)
330 goto segv;
331 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
332 regs->tstate |= psr_to_tstate_icc(psr);
333 return;
334
335 segv:
336 do_exit(SIGSEGV);
337 }
338
339 asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
340 {
341 struct rt_signal_frame32 *sf;
342 unsigned int psr;
343 unsigned pc, npc, fpu_save;
344 sigset_t set;
345 sigset_t32 seta;
346 stack_t st;
347 int err, i;
348
349 synchronize_user_stack();
350 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
351 sf = (struct rt_signal_frame32 *) regs->u_regs [UREG_FP];
352
353 /* 1. Make sure we are not getting garbage from the user */
354 if (verify_area (VERIFY_READ, sf, sizeof (*sf)) ||
355 (((unsigned long) sf) & 3))
356 goto segv;
357
358 get_user(pc, &sf->regs.pc);
359 __get_user(npc, &sf->regs.npc);
360
361 if ((pc | npc) & 3)
362 goto segv;
363
364 regs->tpc = pc;
365 regs->tnpc = npc;
366
367 /* 2. Restore the state */
368 err = __get_user(regs->y, &sf->regs.y);
369 err |= __get_user(psr, &sf->regs.psr);
370
371 for (i = UREG_G1; i <= UREG_I7; i++)
372 err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
373 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
374 err |= __get_user(i, &sf->v8plus.g_upper[0]);
375 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
376 for (i = UREG_G1; i <= UREG_I7; i++)
377 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
378 }
379 }
380
381 /* User can only change condition codes in %tstate. */
382 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
383 regs->tstate |= psr_to_tstate_icc(psr);
384
385 err |= __get_user(fpu_save, &sf->fpu_save);
386 if (fpu_save)
387 err |= restore_fpu_state32(regs, &sf->fpu_state);
388 err |= copy_from_user(&seta, &sf->mask, sizeof(sigset_t32));
389 err |= __get_user((long)st.ss_sp, &sf->stack.ss_sp);
390 err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
391 err |= __get_user(st.ss_size, &sf->stack.ss_size);
392 if (err)
393 goto segv;
394
395 /* It is more difficult to avoid calling this function than to
396 call it and ignore errors. */
397 do_sigaltstack(&st, NULL, (unsigned long)sf);
398
399 switch (_NSIG_WORDS) {
400 case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
401 case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
402 case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
403 case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
404 }
405 sigdelsetmask(&set, ~_BLOCKABLE);
406 spin_lock_irq(&current->sigmask_lock);
407 current->blocked = set;
408 recalc_sigpending(current);
409 spin_unlock_irq(&current->sigmask_lock);
410 return;
411 segv:
412 do_exit(SIGSEGV);
413 }
414
415 /* Checks if the fp is valid */
416 static int invalid_frame_pointer(void *fp, int fplen)
417 {
418 if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
419 return 1;
420 return 0;
421 }
422
423 static inline void *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
424 {
425 unsigned long sp;
426
427 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
428 sp = regs->u_regs[UREG_FP];
429
430 /* This is the X/Open sanctioned signal stack switching. */
431 if (sa->sa_flags & SA_ONSTACK) {
432 if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
433 sp = current->sas_ss_sp + current->sas_ss_size;
434 }
435 return (void *)(sp - framesize);
436 }
437
438 static void
439 setup_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
440 struct pt_regs *regs, int signr, sigset_t *oldset)
441 {
442 struct signal_sframe32 *sframep;
443 struct sigcontext32 *sc;
444 unsigned seta[_NSIG_WORDS32];
445 int err = 0;
446
447 #if 0
448 int window = 0;
449 #endif
450 unsigned psr;
451
452 synchronize_user_stack();
453 save_and_clear_fpu();
454
455 sframep = (struct signal_sframe32 *)get_sigframe(sa, regs, SF_ALIGNEDSZ);
456 if (invalid_frame_pointer (sframep, sizeof(*sframep))){
457 #ifdef DEBUG_SIGNALS /* fills up the console logs during crashme runs, yuck... */
458 printk("%s [%d]: User has trashed signal stack\n",
459 current->comm, current->pid);
460 printk("Sigstack ptr %p handler at pc<%016lx> for sig<%d>\n",
461 sframep, pc, signr);
462 #endif
463 /* Don't change signal code and address, so that
464 * post mortem debuggers can have a look.
465 */
466 do_exit(SIGILL);
467 }
468
469 sc = &sframep->sig_context;
470
471 /* We've already made sure frame pointer isn't in kernel space... */
472 err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
473 &sc->sigc_onstack);
474
475 switch (_NSIG_WORDS) {
476 case 4: seta[7] = (oldset->sig[3] >> 32);
477 seta[6] = oldset->sig[3];
478 case 3: seta[5] = (oldset->sig[2] >> 32);
479 seta[4] = oldset->sig[2];
480 case 2: seta[3] = (oldset->sig[1] >> 32);
481 seta[2] = oldset->sig[1];
482 case 1: seta[1] = (oldset->sig[0] >> 32);
483 seta[0] = oldset->sig[0];
484 }
485 err |= __put_user(seta[0], &sc->sigc_mask);
486 err |= __copy_to_user(sframep->extramask, seta + 1,
487 (_NSIG_WORDS32 - 1) * sizeof(unsigned));
488 err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
489 err |= __put_user(pc, &sc->sigc_pc);
490 err |= __put_user(npc, &sc->sigc_npc);
491 psr = tstate_to_psr (regs->tstate);
492 if(current->thread.fpsaved[0] & FPRS_FEF)
493 psr |= PSR_EF;
494 err |= __put_user(psr, &sc->sigc_psr);
495 err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
496 err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
497 err |= __put_user(current->thread.w_saved, &sc->sigc_oswins);
498 #if 0
499 /* w_saved is not currently used... */
500 if(current->thread.w_saved)
501 for(window = 0; window < current->thread.w_saved; window++) {
502 sc->sigc_spbuf[window] =
503 (char *)current->thread.rwbuf_stkptrs[window];
504 err |= copy_to_user(&sc->sigc_wbuf[window],
505 &current->thread.reg_window[window],
506 sizeof(struct reg_window));
507 }
508 else
509 #endif
510 err |= copy_in_user((u32 *)sframep,
511 (u32 *)(regs->u_regs[UREG_FP]),
512 sizeof(struct reg_window32));
513
514 current->thread.w_saved = 0; /* So process is allowed to execute. */
515 err |= __put_user(signr, &sframep->sig_num);
516 if(signr == SIGSEGV ||
517 signr == SIGILL ||
518 signr == SIGFPE ||
519 signr == SIGBUS ||
520 signr == SIGEMT) {
521 err |= __put_user(current->thread.sig_desc, &sframep->sig_code);
522 err |= __put_user(current->thread.sig_address, &sframep->sig_address);
523 } else {
524 err |= __put_user(0, &sframep->sig_code);
525 err |= __put_user(0, &sframep->sig_address);
526 }
527 err |= __put_user((u64)sc, &sframep->sig_scptr);
528 if (err)
529 goto sigsegv;
530
531 regs->u_regs[UREG_FP] = (unsigned long) sframep;
532 regs->tpc = (unsigned long) sa->sa_handler;
533 regs->tnpc = (regs->tpc + 4);
534 return;
535
536 sigsegv:
537 do_exit(SIGSEGV);
538 }
539
540
541 static inline int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t *fpu)
542 {
543 unsigned long *fpregs = (unsigned long *)(((char *)current) + AOFF_task_fpregs);
544 unsigned long fprs;
545 int err = 0;
546
547 fprs = current->thread.fpsaved[0];
548 if (fprs & FPRS_DL)
549 err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
550 (sizeof(unsigned int) * 32));
551 if (fprs & FPRS_DU)
552 err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
553 (sizeof(unsigned int) * 32));
554 err |= __put_user(current->thread.xfsr[0], &fpu->si_fsr);
555 err |= __put_user(current->thread.gsr[0], &fpu->si_gsr);
556 err |= __put_user(fprs, &fpu->si_fprs);
557
558 return err;
559 }
560
561 static inline void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
562 int signo, sigset_t *oldset)
563 {
564 struct new_signal_frame32 *sf;
565 int sigframe_size;
566 u32 psr;
567 int i, err;
568 unsigned seta[_NSIG_WORDS32];
569
570 /* 1. Make sure everything is clean */
571 synchronize_user_stack();
572 save_and_clear_fpu();
573
574 sigframe_size = NF_ALIGNEDSZ;
575 if (!(current->thread.fpsaved[0] & FPRS_FEF))
576 sigframe_size -= sizeof(__siginfo_fpu_t);
577
578 sf = (struct new_signal_frame32 *)get_sigframe(&ka->sa, regs, sigframe_size);
579
580 if (invalid_frame_pointer (sf, sigframe_size)) {
581 #ifdef DEBUG_SIGNALS
582 printk("new_setup_frame32(%s:%d): invalid_frame_pointer(%p, %d)\n",
583 current->comm, current->pid, sf, sigframe_size);
584 #endif
585 goto sigill;
586 }
587
588 if (current->thread.w_saved != 0) {
589 #ifdef DEBUG_SIGNALS
590 printk ("%s[%d]: Invalid user stack frame for "
591 "signal delivery.\n", current->comm, current->pid);
592 #endif
593 goto sigill;
594 }
595
596 /* 2. Save the current process state */
597 err = put_user(regs->tpc, &sf->info.si_regs.pc);
598 err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
599 err |= __put_user(regs->y, &sf->info.si_regs.y);
600 psr = tstate_to_psr (regs->tstate);
601 if(current->thread.fpsaved[0] & FPRS_FEF)
602 psr |= PSR_EF;
603 err |= __put_user(psr, &sf->info.si_regs.psr);
604 for (i = 0; i < 16; i++)
605 err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
606 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
607 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
608 for (i = 1; i < 16; i++)
609 err |= __put_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
610
611 if (psr & PSR_EF) {
612 err |= save_fpu_state32(regs, &sf->fpu_state);
613 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
614 } else {
615 err |= __put_user(0, &sf->fpu_save);
616 }
617
618 switch (_NSIG_WORDS) {
619 case 4: seta[7] = (oldset->sig[3] >> 32);
620 seta[6] = oldset->sig[3];
621 case 3: seta[5] = (oldset->sig[2] >> 32);
622 seta[4] = oldset->sig[2];
623 case 2: seta[3] = (oldset->sig[1] >> 32);
624 seta[2] = oldset->sig[1];
625 case 1: seta[1] = (oldset->sig[0] >> 32);
626 seta[0] = oldset->sig[0];
627 }
628 err |= __put_user(seta[0], &sf->info.si_mask);
629 err |= __copy_to_user(sf->extramask, seta + 1,
630 (_NSIG_WORDS32 - 1) * sizeof(unsigned));
631
632 err |= copy_in_user((u32 *)sf,
633 (u32 *)(regs->u_regs[UREG_FP]),
634 sizeof(struct reg_window32));
635
636 if (err)
637 goto sigsegv;
638
639 /* 3. signal handler back-trampoline and parameters */
640 regs->u_regs[UREG_FP] = (unsigned long) sf;
641 regs->u_regs[UREG_I0] = signo;
642 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
643
644 /* 4. signal handler */
645 regs->tpc = (unsigned long) ka->sa.sa_handler;
646 regs->tnpc = (regs->tpc + 4);
647
648 /* 5. return to kernel instructions */
649 if (ka->ka_restorer)
650 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
651 else {
652 /* Flush instruction space. */
653 unsigned long address = ((unsigned long)&(sf->insns[0]));
654 pgd_t *pgdp = pgd_offset(current->mm, address);
655 pmd_t *pmdp = pmd_offset(pgdp, address);
656 pte_t *ptep = pte_offset(pmdp, address);
657
658 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
659
660 err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
661 err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
662 if(err)
663 goto sigsegv;
664
665 if(pte_present(*ptep)) {
666 unsigned long page = (unsigned long)
667 __va(pte_pagenr(*ptep) << PAGE_SHIFT);
668
669 __asm__ __volatile__("
670 membar #StoreStore
671 flush %0 + %1"
672 : : "r" (page), "r" (address & (PAGE_SIZE - 1))
673 : "memory");
674 }
675 }
676 return;
677
678 sigill:
679 do_exit(SIGILL);
680 sigsegv:
681 do_exit(SIGSEGV);
682 }
683
684 /* Setup a Solaris stack frame */
685 static inline void
686 setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
687 struct pt_regs *regs, int signr, sigset_t *oldset)
688 {
689 svr4_signal_frame_t *sfp;
690 svr4_gregset_t *gr;
691 svr4_siginfo_t *si;
692 svr4_mcontext_t *mc;
693 svr4_gwindows_t *gw;
694 svr4_ucontext_t *uc;
695 svr4_sigset_t setv;
696 #if 0
697 int window = 0;
698 #endif
699 unsigned psr;
700 int i, err;
701
702 synchronize_user_stack();
703 save_and_clear_fpu();
704
705 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
706 sfp = (svr4_signal_frame_t *) get_sigframe(sa, regs, REGWIN_SZ + SVR4_SF_ALIGNED);
707
708 if (invalid_frame_pointer (sfp, sizeof (*sfp))){
709 #ifdef DEBUG_SIGNALS
710 printk ("Invalid stack frame\n");
711 #endif
712 do_exit(SIGILL);
713 }
714
715 /* Start with a clean frame pointer and fill it */
716 err = clear_user(sfp, sizeof (*sfp));
717
718 /* Setup convenience variables */
719 si = &sfp->si;
720 uc = &sfp->uc;
721 gw = &sfp->gw;
722 mc = &uc->mcontext;
723 gr = &mc->greg;
724
725 /* FIXME: where am I supposed to put this?
726 * sc->sigc_onstack = old_status;
727 * anyways, it does not look like it is used for anything at all.
728 */
729 setv.sigbits[0] = oldset->sig[0];
730 setv.sigbits[1] = (oldset->sig[0] >> 32);
731 if (_NSIG_WORDS >= 2) {
732 setv.sigbits[2] = oldset->sig[1];
733 setv.sigbits[3] = (oldset->sig[1] >> 32);
734 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
735 } else
736 err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
737
738 /* Store registers */
739 err |= __put_user(regs->tpc, &((*gr) [SVR4_PC]));
740 err |= __put_user(regs->tnpc, &((*gr) [SVR4_NPC]));
741 psr = tstate_to_psr (regs->tstate);
742 if(current->thread.fpsaved[0] & FPRS_FEF)
743 psr |= PSR_EF;
744 err |= __put_user(psr, &((*gr) [SVR4_PSR]));
745 err |= __put_user(regs->y, &((*gr) [SVR4_Y]));
746
747 /* Copy g [1..7] and o [0..7] registers */
748 for (i = 0; i < 7; i++)
749 err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
750 for (i = 0; i < 8; i++)
751 err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
752
753 /* Setup sigaltstack */
754 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
755 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
756 err |= __put_user(current->sas_ss_size, &uc->stack.size);
757
758 /* Save the currently window file: */
759
760 /* 1. Link sfp->uc->gwins to our windows */
761 err |= __put_user((u32)(long)gw, &mc->gwin);
762
763 /* 2. Number of windows to restore at setcontext (): */
764 err |= __put_user(current->thread.w_saved, &gw->count);
765
766 /* 3. Save each valid window
767 * Currently, it makes a copy of the windows from the kernel copy.
768 * David's code for SunOS, makes the copy but keeps the pointer to
769 * the kernel. My version makes the pointer point to a userland
770 * copy of those. Mhm, I wonder if I shouldn't just ignore those
771 * on setcontext and use those that are on the kernel, the signal
772 * handler should not be modyfing those, mhm.
773 *
774 * These windows are just used in case synchronize_user_stack failed
775 * to flush the user windows.
776 */
777 #if 0
778 for(window = 0; window < current->thread.w_saved; window++) {
779 err |= __put_user((int *) &(gw->win [window]),
780 (int **)gw->winptr +window );
781 err |= copy_to_user(&gw->win [window],
782 &current->thread.reg_window [window],
783 sizeof (svr4_rwindow_t));
784 err |= __put_user(0, (int *)gw->winptr + window);
785 }
786 #endif
787
788 /* 4. We just pay attention to the gw->count field on setcontext */
789 current->thread.w_saved = 0; /* So process is allowed to execute. */
790
791 /* Setup the signal information. Solaris expects a bunch of
792 * information to be passed to the signal handler, we don't provide
793 * that much currently, should use those that David already
794 * is providing with thread.sig_desc
795 */
796 err |= __put_user(signr, &si->siginfo.signo);
797 err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
798 if (err)
799 goto sigsegv;
800
801 regs->u_regs[UREG_FP] = (unsigned long) sfp;
802 regs->tpc = (unsigned long) sa->sa_handler;
803 regs->tnpc = (regs->tpc + 4);
804
805 #ifdef DEBUG_SIGNALS
806 printk ("Solaris-frame: %x %x\n", (int) regs->tpc, (int) regs->tnpc);
807 #endif
808 /* Arguments passed to signal handler */
809 if (regs->u_regs [14]){
810 struct reg_window32 *rw = (struct reg_window32 *)
811 (regs->u_regs [14] & 0x00000000ffffffffUL);
812
813 err |= __put_user(signr, &rw->ins [0]);
814 err |= __put_user((u64)si, &rw->ins [1]);
815 err |= __put_user((u64)uc, &rw->ins [2]);
816 err |= __put_user((u64)sfp, &rw->ins [6]); /* frame pointer */
817 if (err)
818 goto sigsegv;
819
820 regs->u_regs[UREG_I0] = signr;
821 regs->u_regs[UREG_I1] = (u32)(u64) si;
822 regs->u_regs[UREG_I2] = (u32)(u64) uc;
823 }
824 return;
825
826 sigsegv:
827 do_exit(SIGSEGV);
828 }
829
830 asmlinkage int
831 svr4_getcontext(svr4_ucontext_t *uc, struct pt_regs *regs)
832 {
833 svr4_gregset_t *gr;
834 svr4_mcontext_t *mc;
835 svr4_sigset_t setv;
836 int i, err;
837
838 synchronize_user_stack();
839 save_and_clear_fpu();
840
841 if (current->thread.w_saved){
842 printk ("Uh oh, w_saved is not zero (%d)\n", (int) current->thread.w_saved);
843 do_exit (SIGSEGV);
844 }
845 err = clear_user(uc, sizeof (*uc));
846
847 /* Setup convenience variables */
848 mc = &uc->mcontext;
849 gr = &mc->greg;
850
851 setv.sigbits[0] = current->blocked.sig[0];
852 setv.sigbits[1] = (current->blocked.sig[0] >> 32);
853 if (_NSIG_WORDS >= 2) {
854 setv.sigbits[2] = current->blocked.sig[1];
855 setv.sigbits[3] = (current->blocked.sig[1] >> 32);
856 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
857 } else
858 err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
859
860 /* Store registers */
861 err |= __put_user(regs->tpc, &uc->mcontext.greg [SVR4_PC]);
862 err |= __put_user(regs->tnpc, &uc->mcontext.greg [SVR4_NPC]);
863 #if 1
864 err |= __put_user(0, &uc->mcontext.greg [SVR4_PSR]);
865 #else
866 i = tstate_to_psr(regs->tstate) & ~PSR_EF;
867 if (current->thread.fpsaved[0] & FPRS_FEF)
868 i |= PSR_EF;
869 err |= __put_user(i, &uc->mcontext.greg [SVR4_PSR]);
870 #endif
871 err |= __put_user(regs->y, &uc->mcontext.greg [SVR4_Y]);
872
873 /* Copy g [1..7] and o [0..7] registers */
874 for (i = 0; i < 7; i++)
875 err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
876 for (i = 0; i < 8; i++)
877 err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
878
879 /* Setup sigaltstack */
880 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
881 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
882 err |= __put_user(current->sas_ss_size, &uc->stack.size);
883
884 /* The register file is not saved
885 * we have already stuffed all of it with sync_user_stack
886 */
887 return (err ? -EFAULT : 0);
888 }
889
890
891 /* Set the context for a svr4 application, this is Solaris way to sigreturn */
892 asmlinkage int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs)
893 {
894 struct thread_struct *tp = &current->thread;
895 svr4_gregset_t *gr;
896 u32 pc, npc, psr;
897 sigset_t set;
898 svr4_sigset_t setv;
899 int i, err;
900 stack_t st;
901
902 /* Fixme: restore windows, or is this already taken care of in
903 * svr4_setup_frame when sync_user_windows is done?
904 */
905 flush_user_windows();
906
907 if (tp->w_saved){
908 printk ("Uh oh, w_saved is: 0x%x\n", tp->w_saved);
909 goto sigsegv;
910 }
911 if (((unsigned long) c) & 3){
912 printk ("Unaligned structure passed\n");
913 goto sigsegv;
914 }
915
916 if(!__access_ok((unsigned long)c, sizeof(*c))) {
917 /* Miguel, add nice debugging msg _here_. ;-) */
918 goto sigsegv;
919 }
920
921 /* Check for valid PC and nPC */
922 gr = &c->mcontext.greg;
923 err = __get_user(pc, &((*gr)[SVR4_PC]));
924 err |= __get_user(npc, &((*gr)[SVR4_NPC]));
925 if((pc | npc) & 3) {
926 #ifdef DEBUG_SIGNALS
927 printk ("setcontext, PC or nPC were bogus\n");
928 #endif
929 goto sigsegv;
930 }
931
932 /* Retrieve information from passed ucontext */
933 /* note that nPC is ored a 1, this is used to inform entry.S */
934 /* that we don't want it to mess with our PC and nPC */
935
936 err |= copy_from_user (&setv, &c->sigmask, sizeof(svr4_sigset_t));
937 set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32);
938 if (_NSIG_WORDS >= 2)
939 set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32);
940
941 err |= __get_user((long)st.ss_sp, &c->stack.sp);
942 err |= __get_user(st.ss_flags, &c->stack.flags);
943 err |= __get_user(st.ss_size, &c->stack.size);
944 if (err)
945 goto sigsegv;
946
947 /* It is more difficult to avoid calling this function than to
948 call it and ignore errors. */
949 do_sigaltstack(&st, NULL, regs->u_regs[UREG_I6]);
950
951 sigdelsetmask(&set, ~_BLOCKABLE);
952 spin_lock_irq(&current->sigmask_lock);
953 current->blocked = set;
954 recalc_sigpending(current);
955 spin_unlock_irq(&current->sigmask_lock);
956 regs->tpc = pc;
957 regs->tnpc = npc | 1;
958 err |= __get_user(regs->y, &((*gr) [SVR4_Y]));
959 err |= __get_user(psr, &((*gr) [SVR4_PSR]));
960 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
961 regs->tstate |= psr_to_tstate_icc(psr);
962 #if 0
963 if(psr & PSR_EF)
964 regs->tstate |= TSTATE_PEF;
965 #endif
966 /* Restore g[1..7] and o[0..7] registers */
967 for (i = 0; i < 7; i++)
968 err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
969 for (i = 0; i < 8; i++)
970 err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
971 if(err)
972 goto sigsegv;
973
974 return -EINTR;
975 sigsegv:
976 do_exit(SIGSEGV);
977 }
978
979 static inline void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
980 unsigned long signr, sigset_t *oldset,
981 siginfo_t *info)
982 {
983 struct rt_signal_frame32 *sf;
984 int sigframe_size;
985 u32 psr;
986 int i, err;
987 sigset_t32 seta;
988
989 /* 1. Make sure everything is clean */
990 synchronize_user_stack();
991 save_and_clear_fpu();
992
993 sigframe_size = RT_ALIGNEDSZ;
994 if (!(current->thread.fpsaved[0] & FPRS_FEF))
995 sigframe_size -= sizeof(__siginfo_fpu_t);
996
997 sf = (struct rt_signal_frame32 *)get_sigframe(&ka->sa, regs, sigframe_size);
998
999 if (invalid_frame_pointer (sf, sigframe_size)) {
1000 #ifdef DEBUG_SIGNALS
1001 printk("rt_setup_frame32(%s:%d): invalid_frame_pointer(%p, %d)\n",
1002 current->comm, current->pid, sf, sigframe_size);
1003 #endif
1004 goto sigill;
1005 }
1006
1007 if (current->thread.w_saved != 0) {
1008 #ifdef DEBUG_SIGNALS
1009 printk ("%s[%d]: Invalid user stack frame for "
1010 "signal delivery.\n", current->comm, current->pid);
1011 #endif
1012 goto sigill;
1013 }
1014
1015 /* 2. Save the current process state */
1016 err = put_user(regs->tpc, &sf->regs.pc);
1017 err |= __put_user(regs->tnpc, &sf->regs.npc);
1018 err |= __put_user(regs->y, &sf->regs.y);
1019 psr = tstate_to_psr (regs->tstate);
1020 if(current->thread.fpsaved[0] & FPRS_FEF)
1021 psr |= PSR_EF;
1022 err |= __put_user(psr, &sf->regs.psr);
1023 for (i = 0; i < 16; i++)
1024 err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
1025 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
1026 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
1027 for (i = 1; i < 16; i++)
1028 err |= __put_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
1029
1030 if (psr & PSR_EF) {
1031 err |= save_fpu_state32(regs, &sf->fpu_state);
1032 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
1033 } else {
1034 err |= __put_user(0, &sf->fpu_save);
1035 }
1036
1037 /* Update the siginfo structure. Is this good? */
1038 if (info->si_code == 0) {
1039 info->si_signo = signr;
1040 info->si_errno = 0;
1041
1042 switch (signr) {
1043 case SIGSEGV:
1044 case SIGILL:
1045 case SIGFPE:
1046 case SIGBUS:
1047 case SIGEMT:
1048 info->si_code = current->thread.sig_desc;
1049 info->si_addr = (void *)current->thread.sig_address;
1050 info->si_trapno = 0;
1051 break;
1052 default:
1053 break;
1054 }
1055 }
1056
1057 err = __put_user (info->si_signo, &sf->info.si_signo);
1058 err |= __put_user (info->si_errno, &sf->info.si_errno);
1059 err |= __put_user (info->si_code, &sf->info.si_code);
1060 if (info->si_code < 0)
1061 err |= __copy_to_user (sf->info._sifields._pad, info->_sifields._pad, SI_PAD_SIZE);
1062 else {
1063 i = info->si_signo;
1064 if (info->si_code == SI_USER)
1065 i = SIGRTMIN;
1066 switch (i) {
1067 case SIGPOLL:
1068 err |= __put_user (info->si_band, &sf->info.si_band);
1069 err |= __put_user (info->si_fd, &sf->info.si_fd);
1070 break;
1071 case SIGCHLD:
1072 err |= __put_user (info->si_pid, &sf->info.si_pid);
1073 err |= __put_user (info->si_uid, &sf->info.si_uid);
1074 err |= __put_user (info->si_status, &sf->info.si_status);
1075 err |= __put_user (info->si_utime, &sf->info.si_utime);
1076 err |= __put_user (info->si_stime, &sf->info.si_stime);
1077 break;
1078 case SIGSEGV:
1079 case SIGILL:
1080 case SIGFPE:
1081 case SIGBUS:
1082 case SIGEMT:
1083 err |= __put_user ((long)info->si_addr, &sf->info.si_addr);
1084 err |= __put_user (info->si_trapno, &sf->info.si_trapno);
1085 break;
1086 default:
1087 err |= __put_user (info->si_pid, &sf->info.si_pid);
1088 err |= __put_user (info->si_uid, &sf->info.si_uid);
1089 break;
1090 }
1091 }
1092
1093 /* Setup sigaltstack */
1094 err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
1095 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
1096 err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
1097
1098 switch (_NSIG_WORDS) {
1099 case 4: seta.sig[7] = (oldset->sig[3] >> 32);
1100 seta.sig[6] = oldset->sig[3];
1101 case 3: seta.sig[5] = (oldset->sig[2] >> 32);
1102 seta.sig[4] = oldset->sig[2];
1103 case 2: seta.sig[3] = (oldset->sig[1] >> 32);
1104 seta.sig[2] = oldset->sig[1];
1105 case 1: seta.sig[1] = (oldset->sig[0] >> 32);
1106 seta.sig[0] = oldset->sig[0];
1107 }
1108 err |= __copy_to_user(&sf->mask, &seta, sizeof(sigset_t32));
1109
1110 err |= copy_in_user((u32 *)sf,
1111 (u32 *)(regs->u_regs[UREG_FP]),
1112 sizeof(struct reg_window32));
1113 if (err)
1114 goto sigsegv;
1115
1116 /* 3. signal handler back-trampoline and parameters */
1117 regs->u_regs[UREG_FP] = (unsigned long) sf;
1118 regs->u_regs[UREG_I0] = signr;
1119 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
1120
1121 /* 4. signal handler */
1122 regs->tpc = (unsigned long) ka->sa.sa_handler;
1123 regs->tnpc = (regs->tpc + 4);
1124
1125 /* 5. return to kernel instructions */
1126 if (ka->ka_restorer)
1127 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
1128 else {
1129 /* Flush instruction space. */
1130 unsigned long address = ((unsigned long)&(sf->insns[0]));
1131 pgd_t *pgdp = pgd_offset(current->mm, address);
1132 pmd_t *pmdp = pmd_offset(pgdp, address);
1133 pte_t *ptep = pte_offset(pmdp, address);
1134
1135 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
1136
1137 /* mov __NR_rt_sigreturn, %g1 */
1138 err |= __put_user(0x82102065, &sf->insns[0]);
1139
1140 /* t 0x10 */
1141 err |= __put_user(0x91d02010, &sf->insns[1]);
1142 if (err)
1143 goto sigsegv;
1144
1145 if(pte_present(*ptep)) {
1146 unsigned long page = (unsigned long)
1147 __va(pte_pagenr(*ptep) << PAGE_SHIFT);
1148
1149 __asm__ __volatile__("
1150 membar #StoreStore
1151 flush %0 + %1"
1152 : : "r" (page), "r" (address & (PAGE_SIZE - 1))
1153 : "memory");
1154 }
1155 }
1156 return;
1157
1158 sigill:
1159 do_exit(SIGILL);
1160 sigsegv:
1161 do_exit(SIGSEGV);
1162 }
1163
1164 static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
1165 siginfo_t *info,
1166 sigset_t *oldset, struct pt_regs *regs,
1167 int svr4_signal)
1168 {
1169 if(svr4_signal)
1170 setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc, regs, signr, oldset);
1171 else {
1172 if (ka->sa.sa_flags & SA_SIGINFO)
1173 setup_rt_frame32(ka, regs, signr, oldset, info);
1174 else if (current->thread.flags & SPARC_FLAG_NEWSIGNALS)
1175 new_setup_frame32(ka, regs, signr, oldset);
1176 else
1177 setup_frame32(&ka->sa, regs->tpc, regs->tnpc, regs, signr, oldset);
1178 }
1179 if(ka->sa.sa_flags & SA_ONESHOT)
1180 ka->sa.sa_handler = SIG_DFL;
1181 if(!(ka->sa.sa_flags & SA_NOMASK)) {
1182 spin_lock_irq(&current->sigmask_lock);
1183 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
1184 sigaddset(&current->blocked,signr);
1185 recalc_sigpending(current);
1186 spin_unlock_irq(&current->sigmask_lock);
1187 }
1188 }
1189
1190 static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
1191 struct sigaction *sa)
1192 {
1193 switch(regs->u_regs[UREG_I0]) {
1194 case ERESTARTNOHAND:
1195 no_system_call_restart:
1196 regs->u_regs[UREG_I0] = EINTR;
1197 regs->tstate |= TSTATE_ICARRY;
1198 break;
1199 case ERESTARTSYS:
1200 if(!(sa->sa_flags & SA_RESTART))
1201 goto no_system_call_restart;
1202 /* fallthrough */
1203 case ERESTARTNOINTR:
1204 regs->u_regs[UREG_I0] = orig_i0;
1205 regs->tpc -= 4;
1206 regs->tnpc -= 4;
1207 }
1208 }
1209
1210 #ifdef DEBUG_SIGNALS_MAPS
1211
1212 #define MAPS_LINE_FORMAT "%016lx-%016lx %s %016lx %s %lu "
1213
1214 static inline void read_maps (void)
1215 {
1216 struct vm_area_struct * map, * next;
1217 char * buffer;
1218 ssize_t i;
1219
1220 buffer = (char*)__get_free_page(GFP_KERNEL);
1221 if (!buffer)
1222 return;
1223
1224 for (map = current->mm->mmap ; map ; map = next ) {
1225 /* produce the next line */
1226 char *line;
1227 char str[5], *cp = str;
1228 int flags;
1229 kdev_t dev;
1230 unsigned long ino;
1231
1232 /*
1233 * Get the next vma now (but it won't be used if we sleep).
1234 */
1235 next = map->vm_next;
1236 flags = map->vm_flags;
1237
1238 *cp++ = flags & VM_READ ? 'r' : '-';
1239 *cp++ = flags & VM_WRITE ? 'w' : '-';
1240 *cp++ = flags & VM_EXEC ? 'x' : '-';
1241 *cp++ = flags & VM_MAYSHARE ? 's' : 'p';
1242 *cp++ = 0;
1243
1244 dev = 0;
1245 ino = 0;
1246 if (map->vm_file != NULL) {
1247 dev = map->vm_file->f_dentry->d_inode->i_dev;
1248 ino = map->vm_file->f_dentry->d_inode->i_ino;
1249 line = d_path(map->vm_file->f_dentry, buffer, PAGE_SIZE);
1250 }
1251 printk(MAPS_LINE_FORMAT, map->vm_start, map->vm_end, str, map->vm_pgoff << PAGE_SHIFT,
1252 kdevname(dev), ino);
1253 if (map->vm_file != NULL)
1254 printk("%s\n", line);
1255 else
1256 printk("\n");
1257 }
1258 free_page((unsigned long)buffer);
1259 return;
1260 }
1261
1262 #endif
1263
1264 /* Note that 'init' is a special process: it doesn't get signals it doesn't
1265 * want to handle. Thus you cannot kill init even with a SIGKILL even by
1266 * mistake.
1267 */
1268 asmlinkage int do_signal32(sigset_t *oldset, struct pt_regs * regs,
1269 unsigned long orig_i0, int restart_syscall)
1270 {
1271 unsigned long signr;
1272 struct k_sigaction *ka;
1273 siginfo_t info;
1274
1275 int svr4_signal = current->personality == PER_SVR4;
1276
1277 for (;;) {
1278 spin_lock_irq(&current->sigmask_lock);
1279 signr = dequeue_signal(&current->blocked, &info);
1280 spin_unlock_irq(&current->sigmask_lock);
1281
1282 if (!signr) break;
1283
1284 if ((current->flags & PF_PTRACED) && signr != SIGKILL) {
1285 current->exit_code = signr;
1286 current->state = TASK_STOPPED;
1287 notify_parent(current, SIGCHLD);
1288 schedule();
1289 if (!(signr = current->exit_code))
1290 continue;
1291 current->exit_code = 0;
1292 if (signr == SIGSTOP)
1293 continue;
1294
1295 /* Update the siginfo structure. Is this good? */
1296 if (signr != info.si_signo) {
1297 info.si_signo = signr;
1298 info.si_errno = 0;
1299 info.si_code = SI_USER;
1300 info.si_pid = current->p_pptr->pid;
1301 info.si_uid = current->p_pptr->uid;
1302 }
1303
1304 /* If the (new) signal is now blocked, requeue it. */
1305 if (sigismember(&current->blocked, signr)) {
1306 send_sig_info(signr, &info, current);
1307 continue;
1308 }
1309 }
1310
1311 ka = &current->sig->action[signr-1];
1312
1313 if(ka->sa.sa_handler == SIG_IGN) {
1314 if(signr != SIGCHLD)
1315 continue;
1316
1317 /* sys_wait4() grabs the master kernel lock, so
1318 * we need not do so, that sucker should be
1319 * threaded and would not be that difficult to
1320 * do anyways.
1321 */
1322 while(sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
1323 ;
1324 continue;
1325 }
1326 if(ka->sa.sa_handler == SIG_DFL) {
1327 unsigned long exit_code = signr;
1328
1329 if(current->pid == 1)
1330 continue;
1331 switch(signr) {
1332 case SIGCONT: case SIGCHLD: case SIGWINCH:
1333 continue;
1334
1335 case SIGTSTP: case SIGTTIN: case SIGTTOU:
1336 if (is_orphaned_pgrp(current->pgrp))
1337 continue;
1338
1339 case SIGSTOP:
1340 if (current->flags & PF_PTRACED)
1341 continue;
1342 current->state = TASK_STOPPED;
1343 current->exit_code = signr;
1344 if(!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags &
1345 SA_NOCLDSTOP))
1346 notify_parent(current, SIGCHLD);
1347 schedule();
1348 continue;
1349
1350 case SIGQUIT: case SIGILL: case SIGTRAP:
1351 case SIGABRT: case SIGFPE: case SIGSEGV:
1352 case SIGBUS: case SIGSYS: case SIGXCPU: case SIGXFSZ:
1353 if (do_coredump(signr, regs))
1354 exit_code |= 0x80;
1355 #ifdef DEBUG_SIGNALS
1356 /* Very useful to debug dynamic linker problems */
1357 printk ("Sig %ld going for %s[%d]...\n", signr, current->comm, current->pid);
1358 /* On SMP we are only interested in the current
1359 * CPU's registers.
1360 */
1361 __show_regs (regs);
1362 #ifdef DEBUG_SIGNALS_TLB
1363 do {
1364 extern void sparc_ultra_dump_itlb(void);
1365 extern void sparc_ultra_dump_dtlb(void);
1366 sparc_ultra_dump_dtlb();
1367 sparc_ultra_dump_itlb();
1368 } while(0);
1369 #endif
1370 #ifdef DEBUG_SIGNALS_TRACE
1371 {
1372 struct reg_window32 *rw = (struct reg_window32 *)(regs->u_regs[UREG_FP] & 0xffffffff);
1373 unsigned int ins[8];
1374
1375 while(rw &&
1376 !(((unsigned long) rw) & 0x3)) {
1377 copy_from_user(ins, &rw->ins[0], sizeof(ins));
1378 printk("Caller[%08x](%08x,%08x,%08x,%08x,%08x,%08x)\n", ins[7], ins[0], ins[1], ins[2], ins[3], ins[4], ins[5]);
1379 rw = (struct reg_window32 *)(unsigned long)ins[6];
1380 }
1381 }
1382 #endif
1383 #ifdef DEBUG_SIGNALS_MAPS
1384 printk("Maps:\n");
1385 read_maps();
1386 #endif
1387 #endif
1388 /* fall through */
1389 default:
1390 lock_kernel();
1391 sigaddset(&current->signal, signr);
1392 recalc_sigpending(current);
1393 current->flags |= PF_SIGNALED;
1394 do_exit(exit_code);
1395 /* NOT REACHED */
1396 }
1397 }
1398 if(restart_syscall)
1399 syscall_restart32(orig_i0, regs, &ka->sa);
1400 handle_signal32(signr, ka, &info, oldset, regs, svr4_signal);
1401 return 1;
1402 }
1403 if(restart_syscall &&
1404 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
1405 regs->u_regs[UREG_I0] == ERESTARTSYS ||
1406 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
1407 /* replay the system call when we are done */
1408 regs->u_regs[UREG_I0] = orig_i0;
1409 regs->tpc -= 4;
1410 regs->tnpc -= 4;
1411 }
1412 return 0;
1413 }
1414
1415 struct sigstack32 {
1416 u32 the_stack;
1417 int cur_status;
1418 };
1419
1420 asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
1421 {
1422 struct sigstack32 *ssptr = (struct sigstack32 *)((unsigned long)(u_ssptr));
1423 struct sigstack32 *ossptr = (struct sigstack32 *)((unsigned long)(u_ossptr));
1424 int ret = -EFAULT;
1425
1426 /* First see if old state is wanted. */
1427 if (ossptr) {
1428 if (put_user(current->sas_ss_sp + current->sas_ss_size, &ossptr->the_stack) ||
1429 __put_user(on_sig_stack(sp), &ossptr->cur_status))
1430 goto out;
1431 }
1432
1433 /* Now see if we want to update the new state. */
1434 if (ssptr) {
1435 void *ss_sp;
1436
1437 if (get_user((long)ss_sp, &ssptr->the_stack))
1438 goto out;
1439 /* If the current stack was set with sigaltstack, don't
1440 swap stacks while we are on it. */
1441 ret = -EPERM;
1442 if (current->sas_ss_sp && on_sig_stack(sp))
1443 goto out;
1444
1445 /* Since we don't know the extent of the stack, and we don't
1446 track onstack-ness, but rather calculate it, we must
1447 presume a size. Ho hum this interface is lossy. */
1448 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
1449 current->sas_ss_size = SIGSTKSZ;
1450 }
1451
1452 ret = 0;
1453 out:
1454 return ret;
1455 }
1456
1457 asmlinkage int do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
1458 {
1459 stack_t uss, uoss;
1460 int ret;
1461 mm_segment_t old_fs;
1462
1463 if (ussa && (get_user((long)uss.ss_sp, &((stack_t32 *)(long)ussa)->ss_sp) ||
1464 __get_user(uss.ss_flags, &((stack_t32 *)(long)ussa)->ss_flags) ||
1465 __get_user(uss.ss_size, &((stack_t32 *)(long)ussa)->ss_size)))
1466 return -EFAULT;
1467 old_fs = get_fs();
1468 set_fs(KERNEL_DS);
1469 ret = do_sigaltstack(ussa ? &uss : NULL, uossa ? &uoss : NULL, sp);
1470 set_fs(old_fs);
1471 if (!ret && uossa && (put_user((long)uoss.ss_sp, &((stack_t32 *)(long)uossa)->ss_sp) ||
1472 __put_user(uoss.ss_flags, &((stack_t32 *)(long)uossa)->ss_flags) ||
1473 __put_user(uoss.ss_size, &((stack_t32 *)(long)uossa)->ss_size)))
1474 return -EFAULT;
1475 return ret;
1476 }
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