1 /* $Id: signal.c,v 1.110 2002/02/08 03:57:14 davem Exp $
2 * linux/arch/sparc/kernel/signal.c
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)
10 #include <linux/config.h>
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>
19 #include <linux/tty.h>
20 #include <linux/smp.h>
21 #include <linux/smp_lock.h>
22 #include <linux/binfmts.h> /* do_coredum */
24 #include <asm/uaccess.h>
25 #include <asm/bitops.h>
26 #include <asm/ptrace.h>
28 #include <asm/pgalloc.h>
29 #include <asm/pgtable.h>
30 #include <asm/cacheflush.h> /* flush_sig_insns */
32 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
34 extern void fpsave(unsigned long *fpregs, unsigned long *fsr,
35 void *fpqueue, unsigned long *fpqdepth);
36 extern void fpload(unsigned long *fpregs, unsigned long *fsr);
38 asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
39 unsigned long orig_o0, int restart_syscall);
41 /* Signal frames: the original one (compatible with SunOS):
43 * Set up a signal frame... Make the stack look the way SunOS
44 * expects it to look which is basically:
46 * ---------------------------------- <-- %sp at signal time
49 * Ptr to sigcontext area above
51 * The signal number itself
53 * ---------------------------------- <-- New %sp
55 struct signal_sframe {
56 struct reg_window sig_window;
59 struct sigcontext __user *sig_scptr;
61 struct sigcontext sig_context;
62 unsigned int extramask[_NSIG_WORDS - 1];
66 * And the new one, intended to be used for Linux applications only
67 * (we have enough in there to work with clone).
68 * All the interesting bits are in the info field.
71 struct new_signal_frame {
72 struct sparc_stackf ss;
74 __siginfo_fpu_t __user *fpu_save;
75 unsigned long insns[2] __attribute__ ((aligned (8)));
76 unsigned int extramask[_NSIG_WORDS - 1];
77 unsigned int extra_size; /* Should be 0 */
78 __siginfo_fpu_t fpu_state;
81 struct rt_signal_frame {
82 struct sparc_stackf ss;
86 __siginfo_fpu_t __user *fpu_save;
87 unsigned int insns[2];
89 unsigned int extra_size; /* Should be 0 */
90 __siginfo_fpu_t fpu_state;
94 #define SF_ALIGNEDSZ (((sizeof(struct signal_sframe) + 7) & (~7)))
95 #define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame) + 7) & (~7)))
96 #define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame) + 7) & (~7)))
99 * atomically swap in the new signal mask, and wait for a signal.
100 * This is really tricky on the Sparc, watch out...
102 asmlinkage void _sigpause_common(old_sigset_t set, struct pt_regs *regs)
107 spin_lock_irq(¤t->sighand->siglock);
108 saveset = current->blocked;
109 siginitset(¤t->blocked, set);
111 spin_unlock_irq(¤t->sighand->siglock);
113 regs->pc = regs->npc;
116 /* Condition codes and return value where set here for sigpause,
117 * and so got used by setup_frame, which again causes sigreturn()
121 current->state = TASK_INTERRUPTIBLE;
124 * Return -EINTR and set condition code here,
125 * so the interrupted system call actually returns
129 regs->u_regs[UREG_I0] = EINTR;
130 if (do_signal(&saveset, regs, 0, 0))
135 asmlinkage void do_sigpause(unsigned int set, struct pt_regs *regs)
137 _sigpause_common(set, regs);
140 asmlinkage void do_sigsuspend (struct pt_regs *regs)
142 _sigpause_common(regs->u_regs[UREG_I0], regs);
145 asmlinkage void do_rt_sigsuspend(sigset_t __user *uset, size_t sigsetsize,
146 struct pt_regs *regs)
148 sigset_t oldset, set;
150 /* XXX: Don't preclude handling different sized sigset_t's. */
151 if (sigsetsize != sizeof(sigset_t)) {
153 regs->u_regs[UREG_I0] = EINVAL;
157 if (copy_from_user(&set, uset, sizeof(set))) {
159 regs->u_regs[UREG_I0] = EFAULT;
163 sigdelsetmask(&set, ~_BLOCKABLE);
164 spin_lock_irq(¤t->sighand->siglock);
165 oldset = current->blocked;
166 current->blocked = set;
168 spin_unlock_irq(¤t->sighand->siglock);
170 regs->pc = regs->npc;
173 /* Condition codes and return value where set here for sigpause,
174 * and so got used by setup_frame, which again causes sigreturn()
178 current->state = TASK_INTERRUPTIBLE;
181 * Return -EINTR and set condition code here,
182 * so the interrupted system call actually returns
186 regs->u_regs[UREG_I0] = EINTR;
187 if (do_signal(&oldset, regs, 0, 0))
193 restore_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
197 if (test_tsk_thread_flag(current, TIF_USEDFPU))
198 regs->psr &= ~PSR_EF;
200 if (current == last_task_used_math) {
201 last_task_used_math = 0;
202 regs->psr &= ~PSR_EF;
205 current->used_math = 1;
206 clear_tsk_thread_flag(current, TIF_USEDFPU);
208 if (verify_area(VERIFY_READ, fpu, sizeof(*fpu)))
211 err = __copy_from_user(¤t->thread.float_regs[0], &fpu->si_float_regs[0],
212 (sizeof(unsigned long) * 32));
213 err |= __get_user(current->thread.fsr, &fpu->si_fsr);
214 err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
215 if (current->thread.fpqdepth != 0)
216 err |= __copy_from_user(¤t->thread.fpqueue[0],
218 ((sizeof(unsigned long) +
219 (sizeof(unsigned long *)))*16));
223 static inline void do_new_sigreturn (struct pt_regs *regs)
225 struct new_signal_frame __user *sf;
226 unsigned long up_psr, pc, npc;
228 __siginfo_fpu_t __user *fpu_save;
231 sf = (struct new_signal_frame __user *) regs->u_regs[UREG_FP];
233 /* 1. Make sure we are not getting garbage from the user */
234 if (verify_area(VERIFY_READ, sf, sizeof(*sf)))
240 err = __get_user(pc, &sf->info.si_regs.pc);
241 err |= __get_user(npc, &sf->info.si_regs.npc);
246 /* 2. Restore the state */
248 err |= __copy_from_user(regs, &sf->info.si_regs, sizeof(struct pt_regs));
250 /* User can only change condition codes and FPU enabling in %psr. */
251 regs->psr = (up_psr & ~(PSR_ICC | PSR_EF))
252 | (regs->psr & (PSR_ICC | PSR_EF));
254 err |= __get_user(fpu_save, &sf->fpu_save);
257 err |= restore_fpu_state(regs, fpu_save);
259 /* This is pretty much atomic, no amount locking would prevent
260 * the races which exist anyways.
262 err |= __get_user(set.sig[0], &sf->info.si_mask);
263 err |= __copy_from_user(&set.sig[1], &sf->extramask,
264 (_NSIG_WORDS-1) * sizeof(unsigned int));
269 sigdelsetmask(&set, ~_BLOCKABLE);
270 spin_lock_irq(¤t->sighand->siglock);
271 current->blocked = set;
273 spin_unlock_irq(¤t->sighand->siglock);
280 asmlinkage void do_sigreturn(struct pt_regs *regs)
282 struct sigcontext __user *scptr;
283 unsigned long pc, npc, psr;
287 /* Always make any pending restarted system calls return -EINTR */
288 current_thread_info()->restart_block.fn = do_no_restart_syscall;
290 synchronize_user_stack();
292 if (current->thread.new_signal)
293 return do_new_sigreturn(regs);
295 scptr = (struct sigcontext __user *) regs->u_regs[UREG_I0];
297 /* Check sanity of the user arg. */
298 if (verify_area(VERIFY_READ, scptr, sizeof(struct sigcontext)) ||
299 (((unsigned long) scptr) & 3))
302 err = __get_user(pc, &scptr->sigc_pc);
303 err |= __get_user(npc, &scptr->sigc_npc);
308 /* This is pretty much atomic, no amount locking would prevent
309 * the races which exist anyways.
311 err |= __get_user(set.sig[0], &scptr->sigc_mask);
312 /* Note that scptr + 1 points to extramask */
313 err |= __copy_from_user(&set.sig[1], scptr + 1,
314 (_NSIG_WORDS - 1) * sizeof(unsigned int));
319 sigdelsetmask(&set, ~_BLOCKABLE);
320 spin_lock_irq(¤t->sighand->siglock);
321 current->blocked = set;
323 spin_unlock_irq(¤t->sighand->siglock);
328 err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
329 err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
330 err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
332 /* User can only change condition codes in %psr. */
333 err |= __get_user(psr, &scptr->sigc_psr);
337 regs->psr &= ~(PSR_ICC);
338 regs->psr |= (psr & PSR_ICC);
342 send_sig(SIGSEGV, current, 1);
345 asmlinkage void do_rt_sigreturn(struct pt_regs *regs)
347 struct rt_signal_frame __user *sf;
348 unsigned int psr, pc, npc;
349 __siginfo_fpu_t __user *fpu_save;
354 synchronize_user_stack();
355 sf = (struct rt_signal_frame __user *) regs->u_regs[UREG_FP];
356 if (verify_area(VERIFY_READ, sf, sizeof(*sf)) ||
357 (((unsigned long) sf) & 0x03))
360 err = __get_user(pc, &sf->regs.pc);
361 err |= __get_user(npc, &sf->regs.npc);
362 err |= ((pc | npc) & 0x03);
364 err |= __get_user(regs->y, &sf->regs.y);
365 err |= __get_user(psr, &sf->regs.psr);
367 err |= __copy_from_user(®s->u_regs[UREG_G1],
368 &sf->regs.u_regs[UREG_G1], 15 * sizeof(u32));
370 regs->psr = (regs->psr & ~PSR_ICC) | (psr & PSR_ICC);
372 err |= __get_user(fpu_save, &sf->fpu_save);
375 err |= restore_fpu_state(regs, fpu_save);
376 err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
378 err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
386 /* It is more difficult to avoid calling this function than to
387 * call it and ignore errors.
389 do_sigaltstack(&st, NULL, (unsigned long)sf);
391 sigdelsetmask(&set, ~_BLOCKABLE);
392 spin_lock_irq(¤t->sighand->siglock);
393 current->blocked = set;
395 spin_unlock_irq(¤t->sighand->siglock);
398 send_sig(SIGSEGV, current, 1);
401 /* Checks if the fp is valid */
402 static inline int invalid_frame_pointer(void __user *fp, int fplen)
404 if ((((unsigned long) fp) & 7) ||
405 !__access_ok((unsigned long)fp, fplen) ||
406 ((sparc_cpu_model == sun4 || sparc_cpu_model == sun4c) &&
407 ((unsigned long) fp < 0xe0000000 && (unsigned long) fp >= 0x20000000)))
413 static inline void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
417 sp = regs->u_regs[UREG_FP];
419 /* This is the X/Open sanctioned signal stack switching. */
420 if (sa->sa_flags & SA_ONSTACK) {
421 if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
422 sp = current->sas_ss_sp + current->sas_ss_size;
424 return (void __user *)(sp - framesize);
428 setup_frame(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
430 struct signal_sframe __user *sframep;
431 struct sigcontext __user *sc;
433 unsigned long pc = regs->pc;
434 unsigned long npc = regs->npc;
435 struct thread_info *tp = current_thread_info();
439 synchronize_user_stack();
440 sframep = (struct signal_sframe __user *)
441 get_sigframe(sa, regs, SF_ALIGNEDSZ);
442 if (invalid_frame_pointer(sframep, sizeof(*sframep))){
443 /* Don't change signal code and address, so that
444 * post mortem debuggers can have a look.
446 goto sigill_and_return;
449 sc = &sframep->sig_context;
451 /* We've already made sure frame pointer isn't in kernel space... */
452 err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
454 err |= __put_user(oldset->sig[0], &sc->sigc_mask);
455 err |= __copy_to_user(sframep->extramask, &oldset->sig[1],
456 (_NSIG_WORDS - 1) * sizeof(unsigned int));
457 err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
458 err |= __put_user(pc, &sc->sigc_pc);
459 err |= __put_user(npc, &sc->sigc_npc);
460 err |= __put_user(regs->psr, &sc->sigc_psr);
461 err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
462 err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
463 err |= __put_user(tp->w_saved, &sc->sigc_oswins);
465 for (window = 0; window < tp->w_saved; window++) {
466 put_user((char *)tp->rwbuf_stkptrs[window],
467 &sc->sigc_spbuf[window]);
468 err |= __copy_to_user(&sc->sigc_wbuf[window],
469 &tp->reg_window[window],
470 sizeof(struct reg_window));
473 err |= __copy_to_user(sframep, (char *) regs->u_regs[UREG_FP],
474 sizeof(struct reg_window));
476 tp->w_saved = 0; /* So process is allowed to execute. */
478 err |= __put_user(signr, &sframep->sig_num);
481 if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
482 sig_address = info->si_addr;
485 switch (info->si_code) {
486 case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
487 default: sig_code = SUBSIG_PROTECTION; break;
491 switch (info->si_code) {
492 case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
493 case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
494 case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break;
495 default: sig_code = SUBSIG_STACK; break;
499 switch (info->si_code) {
500 case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
501 case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
502 case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
503 case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
504 case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
505 case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
506 case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
507 default: sig_code = SUBSIG_FPERROR; break;
511 switch (info->si_code) {
512 case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
513 case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
514 default: sig_code = SUBSIG_BUSTIMEOUT; break;
518 switch (info->si_code) {
519 case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
523 if (info->si_code == (__SI_FAULT|0x100)) {
524 /* See sys_sunos.c */
525 sig_code = info->si_trapno;
532 err |= __put_user((long)sig_address, &sframep->sig_address);
533 err |= __put_user(sig_code, &sframep->sig_code);
534 err |= __put_user(sc, &sframep->sig_scptr);
538 regs->u_regs[UREG_FP] = (unsigned long) sframep;
539 regs->pc = (unsigned long) sa->sa_handler;
540 regs->npc = (regs->pc + 4);
551 save_fpu_state(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
555 if (test_tsk_thread_flag(current, TIF_USEDFPU)) {
556 put_psr(get_psr() | PSR_EF);
557 fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
558 ¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
559 regs->psr &= ~(PSR_EF);
560 clear_tsk_thread_flag(current, TIF_USEDFPU);
563 if (current == last_task_used_math) {
564 put_psr(get_psr() | PSR_EF);
565 fpsave(¤t->thread.float_regs[0], ¤t->thread.fsr,
566 ¤t->thread.fpqueue[0], ¤t->thread.fpqdepth);
567 last_task_used_math = 0;
568 regs->psr &= ~(PSR_EF);
571 err |= __copy_to_user(&fpu->si_float_regs[0],
572 ¤t->thread.float_regs[0],
573 (sizeof(unsigned long) * 32));
574 err |= __put_user(current->thread.fsr, &fpu->si_fsr);
575 err |= __put_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
576 if (current->thread.fpqdepth != 0)
577 err |= __copy_to_user(&fpu->si_fpqueue[0],
578 ¤t->thread.fpqueue[0],
579 ((sizeof(unsigned long) +
580 (sizeof(unsigned long *)))*16));
581 current->used_math = 0;
586 new_setup_frame(struct k_sigaction *ka, struct pt_regs *regs,
587 int signo, sigset_t *oldset)
589 struct new_signal_frame __user *sf;
590 int sigframe_size, err;
592 /* 1. Make sure everything is clean */
593 synchronize_user_stack();
595 sigframe_size = NF_ALIGNEDSZ;
596 if (!current->used_math)
597 sigframe_size -= sizeof(__siginfo_fpu_t);
599 sf = (struct new_signal_frame __user *)
600 get_sigframe(&ka->sa, regs, sigframe_size);
602 if (invalid_frame_pointer(sf, sigframe_size))
603 goto sigill_and_return;
605 if (current_thread_info()->w_saved != 0)
606 goto sigill_and_return;
608 /* 2. Save the current process state */
609 err = __copy_to_user(&sf->info.si_regs, regs, sizeof(struct pt_regs));
611 err |= __put_user(0, &sf->extra_size);
613 if (current->used_math) {
614 err |= save_fpu_state(regs, &sf->fpu_state);
615 err |= __put_user(&sf->fpu_state, &sf->fpu_save);
617 err |= __put_user(0, &sf->fpu_save);
620 err |= __put_user(oldset->sig[0], &sf->info.si_mask);
621 err |= __copy_to_user(sf->extramask, &oldset->sig[1],
622 (_NSIG_WORDS - 1) * sizeof(unsigned int));
623 err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
624 sizeof(struct reg_window));
628 /* 3. signal handler back-trampoline and parameters */
629 regs->u_regs[UREG_FP] = (unsigned long) sf;
630 regs->u_regs[UREG_I0] = signo;
631 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
633 /* 4. signal handler */
634 regs->pc = (unsigned long) ka->sa.sa_handler;
635 regs->npc = (regs->pc + 4);
637 /* 5. return to kernel instructions */
639 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
641 regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
643 /* mov __NR_sigreturn, %g1 */
644 err |= __put_user(0x821020d8, &sf->insns[0]);
647 err |= __put_user(0x91d02010, &sf->insns[1]);
651 /* Flush instruction space. */
652 flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
663 new_setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
664 int signo, sigset_t *oldset, siginfo_t *info)
666 struct rt_signal_frame __user *sf;
671 synchronize_user_stack();
672 sigframe_size = RT_ALIGNEDSZ;
673 if (!current->used_math)
674 sigframe_size -= sizeof(__siginfo_fpu_t);
675 sf = (struct rt_signal_frame __user *)
676 get_sigframe(&ka->sa, regs, sigframe_size);
677 if (invalid_frame_pointer(sf, sigframe_size))
679 if (current_thread_info()->w_saved != 0)
682 err = __put_user(regs->pc, &sf->regs.pc);
683 err |= __put_user(regs->npc, &sf->regs.npc);
684 err |= __put_user(regs->y, &sf->regs.y);
686 if (current->used_math)
688 err |= __put_user(psr, &sf->regs.psr);
689 err |= __copy_to_user(&sf->regs.u_regs, regs->u_regs, sizeof(regs->u_regs));
690 err |= __put_user(0, &sf->extra_size);
693 err |= save_fpu_state(regs, &sf->fpu_state);
694 err |= __put_user(&sf->fpu_state, &sf->fpu_save);
696 err |= __put_user(0, &sf->fpu_save);
698 err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t));
700 /* Setup sigaltstack */
701 err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
702 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
703 err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
705 err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP],
706 sizeof(struct reg_window));
708 err |= copy_siginfo_to_user(&sf->info, info);
713 regs->u_regs[UREG_FP] = (unsigned long) sf;
714 regs->u_regs[UREG_I0] = signo;
715 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
717 regs->pc = (unsigned long) ka->sa.sa_handler;
718 regs->npc = (regs->pc + 4);
721 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
723 regs->u_regs[UREG_I7] = (unsigned long)(&(sf->insns[0]) - 2);
725 /* mov __NR_sigreturn, %g1 */
726 err |= __put_user(0x821020d8, &sf->insns[0]);
729 err |= __put_user(0x91d02010, &sf->insns[1]);
733 /* Flush instruction space. */
734 flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
744 /* Setup a Solaris stack frame */
746 setup_svr4_frame(struct sigaction *sa, unsigned long pc, unsigned long npc,
747 struct pt_regs *regs, int signr, sigset_t *oldset)
749 svr4_signal_frame_t __user *sfp;
750 svr4_gregset_t __user *gr;
751 svr4_siginfo_t __user *si;
752 svr4_mcontext_t __user *mc;
753 svr4_gwindows_t __user *gw;
754 svr4_ucontext_t __user *uc;
756 struct thread_info *tp = current_thread_info();
759 synchronize_user_stack();
760 sfp = (svr4_signal_frame_t __user *)
761 get_sigframe(sa, regs, SVR4_SF_ALIGNED + sizeof(struct reg_window));
763 if (invalid_frame_pointer(sfp, sizeof(*sfp)))
764 goto sigill_and_return;
766 /* Start with a clean frame pointer and fill it */
767 err = __clear_user(sfp, sizeof(*sfp));
769 /* Setup convenience variables */
776 /* FIXME: where am I supposed to put this?
777 * sc->sigc_onstack = old_status;
778 * anyways, it does not look like it is used for anything at all.
780 setv.sigbits[0] = oldset->sig[0];
781 setv.sigbits[1] = oldset->sig[1];
782 if (_NSIG_WORDS >= 4) {
783 setv.sigbits[2] = oldset->sig[2];
784 setv.sigbits[3] = oldset->sig[3];
785 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
787 err |= __copy_to_user(&uc->sigmask, &setv,
788 2 * sizeof(unsigned int));
790 /* Store registers */
791 err |= __put_user(regs->pc, &((*gr)[SVR4_PC]));
792 err |= __put_user(regs->npc, &((*gr)[SVR4_NPC]));
793 err |= __put_user(regs->psr, &((*gr)[SVR4_PSR]));
794 err |= __put_user(regs->y, &((*gr)[SVR4_Y]));
796 /* Copy g[1..7] and o[0..7] registers */
797 err |= __copy_to_user(&(*gr)[SVR4_G1], ®s->u_regs[UREG_G1],
799 err |= __copy_to_user(&(*gr)[SVR4_O0], ®s->u_regs[UREG_I0],
802 /* Setup sigaltstack */
803 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
804 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
805 err |= __put_user(current->sas_ss_size, &uc->stack.size);
807 /* Save the currently window file: */
809 /* 1. Link sfp->uc->gwins to our windows */
810 err |= __put_user(gw, &mc->gwin);
812 /* 2. Number of windows to restore at setcontext(): */
813 err |= __put_user(tp->w_saved, &gw->count);
815 /* 3. Save each valid window
816 * Currently, it makes a copy of the windows from the kernel copy.
817 * David's code for SunOS, makes the copy but keeps the pointer to
818 * the kernel. My version makes the pointer point to a userland
819 * copy of those. Mhm, I wonder if I shouldn't just ignore those
820 * on setcontext and use those that are on the kernel, the signal
821 * handler should not be modyfing those, mhm.
823 * These windows are just used in case synchronize_user_stack failed
824 * to flush the user windows.
826 for (window = 0; window < tp->w_saved; window++) {
827 err |= __put_user((int *) &(gw->win[window]), &gw->winptr[window]);
828 err |= __copy_to_user(&gw->win[window],
829 &tp->reg_window[window],
830 sizeof(svr4_rwindow_t));
831 err |= __put_user(0, gw->winptr[window]);
834 /* 4. We just pay attention to the gw->count field on setcontext */
835 tp->w_saved = 0; /* So process is allowed to execute. */
837 /* Setup the signal information. Solaris expects a bunch of
838 * information to be passed to the signal handler, we don't provide
839 * that much currently, should use siginfo.
841 err |= __put_user(signr, &si->siginfo.signo);
842 err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
846 regs->u_regs[UREG_FP] = (unsigned long) sfp;
847 regs->pc = (unsigned long) sa->sa_handler;
848 regs->npc = (regs->pc + 4);
850 /* Arguments passed to signal handler */
851 if (regs->u_regs[14]){
852 struct reg_window *rw = (struct reg_window __user *)
855 err |= __put_user(signr, &rw->ins[0]);
856 err |= __put_user(si, &rw->ins[1]);
857 err |= __put_user(uc, &rw->ins[2]);
858 err |= __put_user(sfp, &rw->ins[6]); /* frame pointer */
862 regs->u_regs[UREG_I0] = signr;
863 regs->u_regs[UREG_I1] = (uint) si;
864 regs->u_regs[UREG_I2] = (uint) uc;
874 asmlinkage int svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs)
876 svr4_gregset_t __user *gr;
877 svr4_mcontext_t __user *mc;
881 synchronize_user_stack();
883 if (current_thread_info()->w_saved)
884 goto sigsegv_and_return;
886 err = clear_user(uc, sizeof(*uc));
890 /* Setup convenience variables */
894 setv.sigbits[0] = current->blocked.sig[0];
895 setv.sigbits[1] = current->blocked.sig[1];
896 if (_NSIG_WORDS >= 4) {
897 setv.sigbits[2] = current->blocked.sig[2];
898 setv.sigbits[3] = current->blocked.sig[3];
899 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
901 err |= __copy_to_user(&uc->sigmask, &setv,
902 2 * sizeof(unsigned int));
904 /* Store registers */
905 err |= __put_user(regs->pc, &uc->mcontext.greg[SVR4_PC]);
906 err |= __put_user(regs->npc, &uc->mcontext.greg[SVR4_NPC]);
907 err |= __put_user(regs->psr, &uc->mcontext.greg[SVR4_PSR]);
908 err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]);
910 /* Copy g[1..7] and o[0..7] registers */
911 err |= __copy_to_user(&(*gr)[SVR4_G1], ®s->u_regs[UREG_G1],
913 err |= __copy_to_user(&(*gr)[SVR4_O0], ®s->u_regs[UREG_I0],
916 /* Setup sigaltstack */
917 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
918 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
919 err |= __put_user(current->sas_ss_size, &uc->stack.size);
921 /* The register file is not saved
922 * we have already stuffed all of it with sync_user_stack
924 return (err ? -EFAULT : 0);
930 /* Set the context for a svr4 application, this is Solaris way to sigreturn */
931 asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs)
933 svr4_gregset_t __user *gr;
934 unsigned long pc, npc, psr;
940 /* Fixme: restore windows, or is this already taken care of in
941 * svr4_setup_frame when sync_user_windows is done?
943 flush_user_windows();
945 if (current_thread_info()->w_saved)
946 goto sigsegv_and_return;
949 goto sigsegv_and_return;
951 if (!__access_ok((unsigned long)c, sizeof(*c)))
952 goto sigsegv_and_return;
954 /* Check for valid PC and nPC */
955 gr = &c->mcontext.greg;
956 err = __get_user(pc, &((*gr)[SVR4_PC]));
957 err |= __get_user(npc, &((*gr)[SVR4_NPC]));
960 goto sigsegv_and_return;
962 /* Retrieve information from passed ucontext */
963 /* note that nPC is ored a 1, this is used to inform entry.S */
964 /* that we don't want it to mess with our PC and nPC */
966 /* This is pretty much atomic, no amount locking would prevent
967 * the races which exist anyways.
969 err |= __copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t));
971 err |= __get_user(st.ss_sp, &c->stack.sp);
972 err |= __get_user(st.ss_flags, &c->stack.flags);
973 err |= __get_user(st.ss_size, &c->stack.size);
976 goto sigsegv_and_return;
978 /* It is more difficult to avoid calling this function than to
979 call it and ignore errors. */
980 do_sigaltstack(&st, NULL, regs->u_regs[UREG_I6]);
982 set.sig[0] = setv.sigbits[0];
983 set.sig[1] = setv.sigbits[1];
984 if (_NSIG_WORDS >= 4) {
985 set.sig[2] = setv.sigbits[2];
986 set.sig[3] = setv.sigbits[3];
988 sigdelsetmask(&set, ~_BLOCKABLE);
989 spin_lock_irq(¤t->sighand->siglock);
990 current->blocked = set;
992 spin_unlock_irq(¤t->sighand->siglock);
995 err |= __get_user(regs->y, &((*gr)[SVR4_Y]));
996 err |= __get_user(psr, &((*gr)[SVR4_PSR]));
997 regs->psr &= ~(PSR_ICC);
998 regs->psr |= (psr & PSR_ICC);
1000 /* Restore g[1..7] and o[0..7] registers */
1001 err |= __copy_from_user(®s->u_regs[UREG_G1], &(*gr)[SVR4_G1],
1003 err |= __copy_from_user(®s->u_regs[UREG_I0], &(*gr)[SVR4_O0],
1005 return (err ? -EFAULT : 0);
1012 handle_signal(unsigned long signr, struct k_sigaction *ka,
1013 siginfo_t *info, sigset_t *oldset, struct pt_regs *regs,
1017 setup_svr4_frame(&ka->sa, regs->pc, regs->npc, regs, signr, oldset);
1019 if (ka->sa.sa_flags & SA_SIGINFO)
1020 new_setup_rt_frame(ka, regs, signr, oldset, info);
1021 else if (current->thread.new_signal)
1022 new_setup_frame(ka, regs, signr, oldset);
1024 setup_frame(&ka->sa, regs, signr, oldset, info);
1026 if (ka->sa.sa_flags & SA_ONESHOT)
1027 ka->sa.sa_handler = SIG_DFL;
1028 if (!(ka->sa.sa_flags & SA_NOMASK)) {
1029 spin_lock_irq(¤t->sighand->siglock);
1030 sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
1031 sigaddset(¤t->blocked, signr);
1032 recalc_sigpending();
1033 spin_unlock_irq(¤t->sighand->siglock);
1037 static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
1038 struct sigaction *sa)
1040 switch(regs->u_regs[UREG_I0]) {
1041 case ERESTART_RESTARTBLOCK:
1042 case ERESTARTNOHAND:
1043 no_system_call_restart:
1044 regs->u_regs[UREG_I0] = EINTR;
1048 if (!(sa->sa_flags & SA_RESTART))
1049 goto no_system_call_restart;
1051 case ERESTARTNOINTR:
1052 regs->u_regs[UREG_I0] = orig_i0;
1058 /* Note that 'init' is a special process: it doesn't get signals it doesn't
1059 * want to handle. Thus you cannot kill init even with a SIGKILL even by
1062 asmlinkage int do_signal(sigset_t *oldset, struct pt_regs * regs,
1063 unsigned long orig_i0, int restart_syscall)
1066 struct sparc_deliver_cookie cookie;
1070 * XXX Disable svr4 signal handling until solaris emulation works.
1071 * It is buggy - Anton
1073 #define SVR4_SIGNAL_BROKEN 1
1074 #ifdef SVR4_SIGNAL_BROKEN
1075 int svr4_signal = 0;
1077 int svr4_signal = current->personality == PER_SVR4;
1080 cookie.restart_syscall = restart_syscall;
1081 cookie.orig_i0 = orig_i0;
1084 oldset = ¤t->blocked;
1086 signr = get_signal_to_deliver(&info, regs, &cookie);
1088 struct k_sigaction *ka;
1090 ka = ¤t->sighand->action[signr-1];
1092 if (cookie.restart_syscall)
1093 syscall_restart(cookie.orig_i0, regs, &ka->sa);
1094 handle_signal(signr, ka, &info, oldset, regs, svr4_signal);
1097 if (cookie.restart_syscall &&
1098 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
1099 regs->u_regs[UREG_I0] == ERESTARTSYS ||
1100 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
1101 /* replay the system call when we are done */
1102 regs->u_regs[UREG_I0] = cookie.orig_i0;
1106 if (cookie.restart_syscall &&
1107 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
1108 regs->u_regs[UREG_G1] = __NR_restart_syscall;
1116 do_sys_sigstack(struct sigstack __user *ssptr, struct sigstack __user *ossptr,
1121 /* First see if old state is wanted. */
1123 if (put_user(current->sas_ss_sp + current->sas_ss_size,
1124 &ossptr->the_stack) ||
1125 __put_user(on_sig_stack(sp), &ossptr->cur_status))
1129 /* Now see if we want to update the new state. */
1133 if (get_user(ss_sp, &ssptr->the_stack))
1135 /* If the current stack was set with sigaltstack, don't
1136 swap stacks while we are on it. */
1138 if (current->sas_ss_sp && on_sig_stack(sp))
1141 /* Since we don't know the extent of the stack, and we don't
1142 track onstack-ness, but rather calculate it, we must
1143 presume a size. Ho hum this interface is lossy. */
1144 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
1145 current->sas_ss_size = SIGSTKSZ;
1152 void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
1154 struct sparc_deliver_cookie *cp = cookie;
1156 if (cp->restart_syscall &&
1157 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
1158 regs->u_regs[UREG_I0] == ERESTARTSYS ||
1159 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
1160 /* replay the system call when we are done */
1161 regs->u_regs[UREG_I0] = cp->orig_i0;
1164 cp->restart_syscall = 0;
1167 if (cp->restart_syscall &&
1168 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
1169 regs->u_regs[UREG_G1] = __NR_restart_syscall;
1172 cp->restart_syscall = 0;