1 /* arch/sparc64/kernel/signal32.c
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
10 #include <linux/sched.h>
11 #include <linux/kernel.h>
12 #include <linux/signal.h>
13 #include <linux/errno.h>
14 #include <linux/wait.h>
15 #include <linux/ptrace.h>
16 #include <linux/unistd.h>
18 #include <linux/tty.h>
19 #include <linux/binfmts.h>
20 #include <linux/compat.h>
21 #include <linux/bitops.h>
22 #include <linux/tracehook.h>
24 #include <asm/uaccess.h>
25 #include <asm/ptrace.h>
26 #include <asm/pgtable.h>
27 #include <asm/psrcompat.h>
28 #include <asm/fpumacro.h>
29 #include <asm/visasm.h>
30 #include <asm/compat_signal.h>
31 #include <asm/switch_to.h>
35 /* This magic should be in g_upper[0] for all upper parts
38 #define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269
40 unsigned int g_upper[8];
41 unsigned int o_upper[8];
43 } siginfo_extra_v8plus_t;
45 struct signal_frame32 {
46 struct sparc_stackf32 ss;
48 /* __siginfo_fpu_t * */ u32 fpu_save;
49 unsigned int insns[2];
50 unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
51 unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
52 /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
53 siginfo_extra_v8plus_t v8plus;
54 /* __siginfo_rwin_t * */u32 rwin_save;
55 } __attribute__((aligned(8)));
57 typedef struct compat_siginfo{
63 int _pad[SI_PAD_SIZE32];
67 compat_pid_t _pid; /* sender's pid */
68 unsigned int _uid; /* sender's uid */
73 compat_timer_t _tid; /* timer id */
74 int _overrun; /* overrun count */
75 compat_sigval_t _sigval; /* same as below */
76 int _sys_private; /* not to be passed to user */
79 /* POSIX.1b signals */
81 compat_pid_t _pid; /* sender's pid */
82 unsigned int _uid; /* sender's uid */
83 compat_sigval_t _sigval;
88 compat_pid_t _pid; /* which child */
89 unsigned int _uid; /* sender's uid */
90 int _status; /* exit code */
91 compat_clock_t _utime;
92 compat_clock_t _stime;
95 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
97 u32 _addr; /* faulting insn/memory ref. */
103 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
109 struct rt_signal_frame32 {
110 struct sparc_stackf32 ss;
111 compat_siginfo_t info;
112 struct pt_regs32 regs;
113 compat_sigset_t mask;
114 /* __siginfo_fpu_t * */ u32 fpu_save;
115 unsigned int insns[2];
117 unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
118 /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
119 siginfo_extra_v8plus_t v8plus;
120 /* __siginfo_rwin_t * */u32 rwin_save;
121 } __attribute__((aligned(8)));
123 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
127 if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
130 /* If you change siginfo_t structure, please be sure
131 this code is fixed accordingly.
132 It should never copy any pad contained in the structure
133 to avoid security leaks, but must copy the generic
134 3 ints plus the relevant union member.
135 This routine must convert siginfo from 64bit to 32bit as well
137 err = __put_user(from->si_signo, &to->si_signo);
138 err |= __put_user(from->si_errno, &to->si_errno);
139 err |= __put_user((short)from->si_code, &to->si_code);
140 if (from->si_code < 0)
141 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
143 switch (from->si_code >> 16) {
144 case __SI_TIMER >> 16:
145 err |= __put_user(from->si_tid, &to->si_tid);
146 err |= __put_user(from->si_overrun, &to->si_overrun);
147 err |= __put_user(from->si_int, &to->si_int);
149 case __SI_CHLD >> 16:
150 err |= __put_user(from->si_utime, &to->si_utime);
151 err |= __put_user(from->si_stime, &to->si_stime);
152 err |= __put_user(from->si_status, &to->si_status);
154 err |= __put_user(from->si_pid, &to->si_pid);
155 err |= __put_user(from->si_uid, &to->si_uid);
157 case __SI_FAULT >> 16:
158 err |= __put_user(from->si_trapno, &to->si_trapno);
159 err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
161 case __SI_POLL >> 16:
162 err |= __put_user(from->si_band, &to->si_band);
163 err |= __put_user(from->si_fd, &to->si_fd);
165 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
166 case __SI_MESGQ >> 16:
167 err |= __put_user(from->si_pid, &to->si_pid);
168 err |= __put_user(from->si_uid, &to->si_uid);
169 err |= __put_user(from->si_int, &to->si_int);
176 /* CAUTION: This is just a very minimalist implementation for the
177 * sake of compat_sys_rt_sigqueueinfo()
179 int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
181 if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t)))
184 if (copy_from_user(to, from, 3*sizeof(int)) ||
185 copy_from_user(to->_sifields._pad, from->_sifields._pad,
192 void do_sigreturn32(struct pt_regs *regs)
194 struct signal_frame32 __user *sf;
195 compat_uptr_t fpu_save;
196 compat_uptr_t rwin_save;
200 unsigned seta[_COMPAT_NSIG_WORDS];
203 /* Always make any pending restarted system calls return -EINTR */
204 current_thread_info()->restart_block.fn = do_no_restart_syscall;
206 synchronize_user_stack();
208 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
209 sf = (struct signal_frame32 __user *) regs->u_regs[UREG_FP];
211 /* 1. Make sure we are not getting garbage from the user */
212 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
213 (((unsigned long) sf) & 3))
216 if (get_user(pc, &sf->info.si_regs.pc) ||
217 __get_user(npc, &sf->info.si_regs.npc))
223 if (test_thread_flag(TIF_32BIT)) {
230 /* 2. Restore the state */
231 err = __get_user(regs->y, &sf->info.si_regs.y);
232 err |= __get_user(psr, &sf->info.si_regs.psr);
234 for (i = UREG_G1; i <= UREG_I7; i++)
235 err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
236 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
237 err |= __get_user(i, &sf->v8plus.g_upper[0]);
238 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
241 for (i = UREG_G1; i <= UREG_I7; i++)
242 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
243 err |= __get_user(asi, &sf->v8plus.asi);
244 regs->tstate &= ~TSTATE_ASI;
245 regs->tstate |= ((asi & 0xffUL) << 24UL);
249 /* User can only change condition codes in %tstate. */
250 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
251 regs->tstate |= psr_to_tstate_icc(psr);
253 /* Prevent syscall restart. */
254 pt_regs_clear_syscall(regs);
256 err |= __get_user(fpu_save, &sf->fpu_save);
257 if (!err && fpu_save)
258 err |= restore_fpu_state(regs, compat_ptr(fpu_save));
259 err |= __get_user(rwin_save, &sf->rwin_save);
260 if (!err && rwin_save) {
261 if (restore_rwin_state(compat_ptr(rwin_save)))
264 err |= __get_user(seta[0], &sf->info.si_mask);
265 err |= copy_from_user(seta+1, &sf->extramask,
266 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
269 switch (_NSIG_WORDS) {
270 case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
271 case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
272 case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
273 case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
275 set_current_blocked(&set);
279 force_sig(SIGSEGV, current);
282 asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
284 struct rt_signal_frame32 __user *sf;
285 unsigned int psr, pc, npc, u_ss_sp;
286 compat_uptr_t fpu_save;
287 compat_uptr_t rwin_save;
290 compat_sigset_t seta;
294 /* Always make any pending restarted system calls return -EINTR */
295 current_thread_info()->restart_block.fn = do_no_restart_syscall;
297 synchronize_user_stack();
298 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
299 sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
301 /* 1. Make sure we are not getting garbage from the user */
302 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
303 (((unsigned long) sf) & 3))
306 if (get_user(pc, &sf->regs.pc) ||
307 __get_user(npc, &sf->regs.npc))
313 if (test_thread_flag(TIF_32BIT)) {
320 /* 2. Restore the state */
321 err = __get_user(regs->y, &sf->regs.y);
322 err |= __get_user(psr, &sf->regs.psr);
324 for (i = UREG_G1; i <= UREG_I7; i++)
325 err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
326 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
327 err |= __get_user(i, &sf->v8plus.g_upper[0]);
328 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
331 for (i = UREG_G1; i <= UREG_I7; i++)
332 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
333 err |= __get_user(asi, &sf->v8plus.asi);
334 regs->tstate &= ~TSTATE_ASI;
335 regs->tstate |= ((asi & 0xffUL) << 24UL);
339 /* User can only change condition codes in %tstate. */
340 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
341 regs->tstate |= psr_to_tstate_icc(psr);
343 /* Prevent syscall restart. */
344 pt_regs_clear_syscall(regs);
346 err |= __get_user(fpu_save, &sf->fpu_save);
347 if (!err && fpu_save)
348 err |= restore_fpu_state(regs, compat_ptr(fpu_save));
349 err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
350 err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
351 st.ss_sp = compat_ptr(u_ss_sp);
352 err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
353 err |= __get_user(st.ss_size, &sf->stack.ss_size);
357 /* It is more difficult to avoid calling this function than to
358 call it and ignore errors. */
361 do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
364 err |= __get_user(rwin_save, &sf->rwin_save);
365 if (!err && rwin_save) {
366 if (restore_rwin_state(compat_ptr(rwin_save)))
370 switch (_NSIG_WORDS) {
371 case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
372 case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
373 case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
374 case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
376 set_current_blocked(&set);
379 force_sig(SIGSEGV, current);
382 /* Checks if the fp is valid */
383 static int invalid_frame_pointer(void __user *fp, int fplen)
385 if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
390 static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
394 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
395 sp = regs->u_regs[UREG_FP];
398 * If we are on the alternate signal stack and would overflow it, don't.
399 * Return an always-bogus address instead so we will die with SIGSEGV.
401 if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
402 return (void __user *) -1L;
404 /* This is the X/Open sanctioned signal stack switching. */
405 if (sa->sa_flags & SA_ONSTACK) {
406 if (sas_ss_flags(sp) == 0)
407 sp = current->sas_ss_sp + current->sas_ss_size;
412 /* Always align the stack frame. This handles two cases. First,
413 * sigaltstack need not be mindful of platform specific stack
414 * alignment. Second, if we took this signal because the stack
415 * is not aligned properly, we'd like to take the signal cleanly
420 return (void __user *) sp;
423 /* The I-cache flush instruction only works in the primary ASI, which
424 * right now is the nucleus, aka. kernel space.
426 * Therefore we have to kick the instructions out using the kernel
427 * side linear mapping of the physical address backing the user
430 static void flush_signal_insns(unsigned long address)
432 unsigned long pstate, paddr;
438 /* Commit all stores of the instructions we are about to flush. */
441 /* Disable cross-call reception. In this way even a very wide
442 * munmap() on another cpu can't tear down the page table
443 * hierarchy from underneath us, since that can't complete
444 * until the IPI tlb flush returns.
447 __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
448 __asm__ __volatile__("wrpr %0, %1, %%pstate"
449 : : "r" (pstate), "i" (PSTATE_IE));
451 pgdp = pgd_offset(current->mm, address);
454 pudp = pud_offset(pgdp, address);
457 pmdp = pmd_offset(pudp, address);
461 ptep = pte_offset_map(pmdp, address);
463 if (!pte_present(pte))
466 paddr = (unsigned long) page_address(pte_page(pte));
468 __asm__ __volatile__("flush %0 + %1"
471 "r" (address & (PAGE_SIZE - 1))
477 __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
481 static int setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
482 int signo, sigset_t *oldset)
484 struct signal_frame32 __user *sf;
489 unsigned int seta[_COMPAT_NSIG_WORDS];
491 /* 1. Make sure everything is clean */
492 synchronize_user_stack();
493 save_and_clear_fpu();
495 wsaved = get_thread_wsaved();
497 sigframe_size = sizeof(*sf);
498 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
499 sigframe_size += sizeof(__siginfo_fpu_t);
501 sigframe_size += sizeof(__siginfo_rwin_t);
503 sf = (struct signal_frame32 __user *)
504 get_sigframe(&ka->sa, regs, sigframe_size);
506 if (invalid_frame_pointer(sf, sigframe_size))
511 /* 2. Save the current process state */
512 if (test_thread_flag(TIF_32BIT)) {
513 regs->tpc &= 0xffffffff;
514 regs->tnpc &= 0xffffffff;
516 err = put_user(regs->tpc, &sf->info.si_regs.pc);
517 err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
518 err |= __put_user(regs->y, &sf->info.si_regs.y);
519 psr = tstate_to_psr(regs->tstate);
520 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
522 err |= __put_user(psr, &sf->info.si_regs.psr);
523 for (i = 0; i < 16; i++)
524 err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
525 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
526 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
527 for (i = 1; i < 16; i++)
528 err |= __put_user(((u32 *)regs->u_regs)[2*i],
529 &sf->v8plus.g_upper[i]);
530 err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
534 __siginfo_fpu_t __user *fp = tail;
536 err |= save_fpu_state(regs, fp);
537 err |= __put_user((u64)fp, &sf->fpu_save);
539 err |= __put_user(0, &sf->fpu_save);
542 __siginfo_rwin_t __user *rwp = tail;
543 tail += sizeof(*rwp);
544 err |= save_rwin_state(wsaved, rwp);
545 err |= __put_user((u64)rwp, &sf->rwin_save);
546 set_thread_wsaved(0);
548 err |= __put_user(0, &sf->rwin_save);
551 switch (_NSIG_WORDS) {
552 case 4: seta[7] = (oldset->sig[3] >> 32);
553 seta[6] = oldset->sig[3];
554 case 3: seta[5] = (oldset->sig[2] >> 32);
555 seta[4] = oldset->sig[2];
556 case 2: seta[3] = (oldset->sig[1] >> 32);
557 seta[2] = oldset->sig[1];
558 case 1: seta[1] = (oldset->sig[0] >> 32);
559 seta[0] = oldset->sig[0];
561 err |= __put_user(seta[0], &sf->info.si_mask);
562 err |= __copy_to_user(sf->extramask, seta + 1,
563 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
566 err |= copy_in_user((u32 __user *)sf,
567 (u32 __user *)(regs->u_regs[UREG_FP]),
568 sizeof(struct reg_window32));
570 struct reg_window *rp;
572 rp = ¤t_thread_info()->reg_window[wsaved - 1];
573 for (i = 0; i < 8; i++)
574 err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
575 for (i = 0; i < 6; i++)
576 err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
577 err |= __put_user(rp->ins[6], &sf->ss.fp);
578 err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
583 /* 3. signal handler back-trampoline and parameters */
584 regs->u_regs[UREG_FP] = (unsigned long) sf;
585 regs->u_regs[UREG_I0] = signo;
586 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
587 regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
589 /* 4. signal handler */
590 regs->tpc = (unsigned long) ka->sa.sa_handler;
591 regs->tnpc = (regs->tpc + 4);
592 if (test_thread_flag(TIF_32BIT)) {
593 regs->tpc &= 0xffffffff;
594 regs->tnpc &= 0xffffffff;
597 /* 5. return to kernel instructions */
598 if (ka->ka_restorer) {
599 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
601 unsigned long address = ((unsigned long)&(sf->insns[0]));
603 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
605 err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
606 err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
609 flush_signal_insns(address);
618 force_sigsegv(signo, current);
622 static int setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
623 unsigned long signr, sigset_t *oldset,
626 struct rt_signal_frame32 __user *sf;
631 compat_sigset_t seta;
633 /* 1. Make sure everything is clean */
634 synchronize_user_stack();
635 save_and_clear_fpu();
637 wsaved = get_thread_wsaved();
639 sigframe_size = sizeof(*sf);
640 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
641 sigframe_size += sizeof(__siginfo_fpu_t);
643 sigframe_size += sizeof(__siginfo_rwin_t);
645 sf = (struct rt_signal_frame32 __user *)
646 get_sigframe(&ka->sa, regs, sigframe_size);
648 if (invalid_frame_pointer(sf, sigframe_size))
653 /* 2. Save the current process state */
654 if (test_thread_flag(TIF_32BIT)) {
655 regs->tpc &= 0xffffffff;
656 regs->tnpc &= 0xffffffff;
658 err = put_user(regs->tpc, &sf->regs.pc);
659 err |= __put_user(regs->tnpc, &sf->regs.npc);
660 err |= __put_user(regs->y, &sf->regs.y);
661 psr = tstate_to_psr(regs->tstate);
662 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
664 err |= __put_user(psr, &sf->regs.psr);
665 for (i = 0; i < 16; i++)
666 err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
667 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
668 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
669 for (i = 1; i < 16; i++)
670 err |= __put_user(((u32 *)regs->u_regs)[2*i],
671 &sf->v8plus.g_upper[i]);
672 err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
676 __siginfo_fpu_t __user *fp = tail;
678 err |= save_fpu_state(regs, fp);
679 err |= __put_user((u64)fp, &sf->fpu_save);
681 err |= __put_user(0, &sf->fpu_save);
684 __siginfo_rwin_t __user *rwp = tail;
685 tail += sizeof(*rwp);
686 err |= save_rwin_state(wsaved, rwp);
687 err |= __put_user((u64)rwp, &sf->rwin_save);
688 set_thread_wsaved(0);
690 err |= __put_user(0, &sf->rwin_save);
693 /* Update the siginfo structure. */
694 err |= copy_siginfo_to_user32(&sf->info, info);
696 /* Setup sigaltstack */
697 err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
698 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
699 err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
701 switch (_NSIG_WORDS) {
702 case 4: seta.sig[7] = (oldset->sig[3] >> 32);
703 seta.sig[6] = oldset->sig[3];
704 case 3: seta.sig[5] = (oldset->sig[2] >> 32);
705 seta.sig[4] = oldset->sig[2];
706 case 2: seta.sig[3] = (oldset->sig[1] >> 32);
707 seta.sig[2] = oldset->sig[1];
708 case 1: seta.sig[1] = (oldset->sig[0] >> 32);
709 seta.sig[0] = oldset->sig[0];
711 err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t));
714 err |= copy_in_user((u32 __user *)sf,
715 (u32 __user *)(regs->u_regs[UREG_FP]),
716 sizeof(struct reg_window32));
718 struct reg_window *rp;
720 rp = ¤t_thread_info()->reg_window[wsaved - 1];
721 for (i = 0; i < 8; i++)
722 err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
723 for (i = 0; i < 6; i++)
724 err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
725 err |= __put_user(rp->ins[6], &sf->ss.fp);
726 err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
731 /* 3. signal handler back-trampoline and parameters */
732 regs->u_regs[UREG_FP] = (unsigned long) sf;
733 regs->u_regs[UREG_I0] = signr;
734 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
735 regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
737 /* 4. signal handler */
738 regs->tpc = (unsigned long) ka->sa.sa_handler;
739 regs->tnpc = (regs->tpc + 4);
740 if (test_thread_flag(TIF_32BIT)) {
741 regs->tpc &= 0xffffffff;
742 regs->tnpc &= 0xffffffff;
745 /* 5. return to kernel instructions */
747 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
749 unsigned long address = ((unsigned long)&(sf->insns[0]));
751 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
753 /* mov __NR_rt_sigreturn, %g1 */
754 err |= __put_user(0x82102065, &sf->insns[0]);
757 err |= __put_user(0x91d02010, &sf->insns[1]);
761 flush_signal_insns(address);
770 force_sigsegv(signr, current);
774 static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
776 sigset_t *oldset, struct pt_regs *regs)
780 if (ka->sa.sa_flags & SA_SIGINFO)
781 err = setup_rt_frame32(ka, regs, signr, oldset, info);
783 err = setup_frame32(ka, regs, signr, oldset);
788 signal_delivered(signr, info, ka, regs, 0);
791 static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
792 struct sigaction *sa)
794 switch (regs->u_regs[UREG_I0]) {
795 case ERESTART_RESTARTBLOCK:
797 no_system_call_restart:
798 regs->u_regs[UREG_I0] = EINTR;
799 regs->tstate |= TSTATE_ICARRY;
802 if (!(sa->sa_flags & SA_RESTART))
803 goto no_system_call_restart;
806 regs->u_regs[UREG_I0] = orig_i0;
812 /* Note that 'init' is a special process: it doesn't get signals it doesn't
813 * want to handle. Thus you cannot kill init even with a SIGKILL even by
816 void do_signal32(sigset_t *oldset, struct pt_regs * regs)
818 struct k_sigaction ka;
819 unsigned long orig_i0;
824 signr = get_signal_to_deliver(&info, &ka, regs, NULL);
828 if (pt_regs_is_syscall(regs) &&
829 (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
831 orig_i0 = regs->u_regs[UREG_G6];
836 syscall_restart32(orig_i0, regs, &ka.sa);
837 handle_signal32(signr, &ka, &info, oldset, regs);
840 if (restart_syscall &&
841 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
842 regs->u_regs[UREG_I0] == ERESTARTSYS ||
843 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
844 /* replay the system call when we are done */
845 regs->u_regs[UREG_I0] = orig_i0;
848 pt_regs_clear_syscall(regs);
850 if (restart_syscall &&
851 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
852 regs->u_regs[UREG_G1] = __NR_restart_syscall;
855 pt_regs_clear_syscall(regs);
858 /* If there's no signal to deliver, we just put the saved sigmask
861 restore_saved_sigmask();
869 asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
871 struct sigstack32 __user *ssptr =
872 (struct sigstack32 __user *)((unsigned long)(u_ssptr));
873 struct sigstack32 __user *ossptr =
874 (struct sigstack32 __user *)((unsigned long)(u_ossptr));
877 /* First see if old state is wanted. */
879 if (put_user(current->sas_ss_sp + current->sas_ss_size,
880 &ossptr->the_stack) ||
881 __put_user(on_sig_stack(sp), &ossptr->cur_status))
885 /* Now see if we want to update the new state. */
889 if (get_user(ss_sp, &ssptr->the_stack))
892 /* If the current stack was set with sigaltstack, don't
893 * swap stacks while we are on it.
896 if (current->sas_ss_sp && on_sig_stack(sp))
899 /* Since we don't know the extent of the stack, and we don't
900 * track onstack-ness, but rather calculate it, we must
901 * presume a size. Ho hum this interface is lossy.
903 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
904 current->sas_ss_size = SIGSTKSZ;
912 asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
918 stack_t32 __user *uss32 = compat_ptr(ussa);
919 stack_t32 __user *uoss32 = compat_ptr(uossa);
921 if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) ||
922 __get_user(uss.ss_flags, &uss32->ss_flags) ||
923 __get_user(uss.ss_size, &uss32->ss_size)))
925 uss.ss_sp = compat_ptr(u_ss_sp);
928 ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL,
929 uossa ? (stack_t __user *) &uoss : NULL, sp);
931 if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) ||
932 __put_user(uoss.ss_flags, &uoss32->ss_flags) ||
933 __put_user(uoss.ss_size, &uoss32->ss_size)))