2 * IA32 Architecture-specific signal handling support.
4 * Copyright (C) 1999, 2001-2002, 2005 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
10 * Derived from i386 and Alpha versions.
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
16 #include <linux/personality.h>
17 #include <linux/ptrace.h>
18 #include <linux/sched.h>
19 #include <linux/signal.h>
20 #include <linux/smp.h>
21 #include <linux/smp_lock.h>
22 #include <linux/stddef.h>
23 #include <linux/syscalls.h>
24 #include <linux/unistd.h>
25 #include <linux/wait.h>
26 #include <linux/compat.h>
28 #include <asm/intrinsics.h>
29 #include <asm/uaccess.h>
31 #include <asm/sigcontext.h>
32 #include <asm/segment.h>
36 #include "../kernel/sigframe.h"
38 #define A(__x) ((unsigned long)(__x))
41 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
43 #define __IA32_NR_sigreturn 119
44 #define __IA32_NR_rt_sigreturn 173
50 struct sigcontext_ia32 sc;
51 struct _fpstate_ia32 fpstate;
52 unsigned int extramask[_COMPAT_NSIG_WORDS-1];
56 struct rt_sigframe_ia32
62 compat_siginfo_t info;
63 struct ucontext_ia32 uc;
64 struct _fpstate_ia32 fpstate;
69 copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
74 if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
77 err = __get_user(to->si_signo, &from->si_signo);
78 err |= __get_user(to->si_errno, &from->si_errno);
79 err |= __get_user(to->si_code, &from->si_code);
82 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
84 switch (to->si_code >> 16) {
86 err |= __get_user(to->si_utime, &from->si_utime);
87 err |= __get_user(to->si_stime, &from->si_stime);
88 err |= __get_user(to->si_status, &from->si_status);
90 err |= __get_user(to->si_pid, &from->si_pid);
91 err |= __get_user(to->si_uid, &from->si_uid);
93 case __SI_FAULT >> 16:
94 err |= __get_user(tmp, &from->si_addr);
95 to->si_addr = (void __user *) tmp;
98 err |= __get_user(to->si_band, &from->si_band);
99 err |= __get_user(to->si_fd, &from->si_fd);
101 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
102 case __SI_MESGQ >> 16:
103 err |= __get_user(to->si_pid, &from->si_pid);
104 err |= __get_user(to->si_uid, &from->si_uid);
105 err |= __get_user(to->si_int, &from->si_int);
113 copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
118 if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
121 /* If you change siginfo_t structure, please be sure
122 this code is fixed accordingly.
123 It should never copy any pad contained in the structure
124 to avoid security leaks, but must copy the generic
125 3 ints plus the relevant union member.
126 This routine must convert siginfo from 64bit to 32bit as well
128 err = __put_user(from->si_signo, &to->si_signo);
129 err |= __put_user(from->si_errno, &to->si_errno);
130 err |= __put_user((short)from->si_code, &to->si_code);
131 if (from->si_code < 0)
132 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
134 switch (from->si_code >> 16) {
135 case __SI_CHLD >> 16:
136 err |= __put_user(from->si_utime, &to->si_utime);
137 err |= __put_user(from->si_stime, &to->si_stime);
138 err |= __put_user(from->si_status, &to->si_status);
140 err |= __put_user(from->si_pid, &to->si_pid);
141 err |= __put_user(from->si_uid, &to->si_uid);
143 case __SI_FAULT >> 16:
144 /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
145 err |= __put_user(from->_sifields._pad[0], &to->si_addr);
147 case __SI_POLL >> 16:
148 err |= __put_user(from->si_band, &to->si_band);
149 err |= __put_user(from->si_fd, &to->si_fd);
151 case __SI_TIMER >> 16:
152 err |= __put_user(from->si_tid, &to->si_tid);
153 err |= __put_user(from->si_overrun, &to->si_overrun);
154 addr = (unsigned long) from->si_ptr;
155 err |= __put_user(addr, &to->si_ptr);
157 case __SI_RT >> 16: /* Not generated by the kernel as of now. */
158 case __SI_MESGQ >> 16:
159 err |= __put_user(from->si_uid, &to->si_uid);
160 err |= __put_user(from->si_pid, &to->si_pid);
161 addr = (unsigned long) from->si_ptr;
162 err |= __put_user(addr, &to->si_ptr);
171 * SAVE and RESTORE of ia32 fpstate info, from ia64 current state
172 * Used in exception handler to pass the fpstate to the user, and restore
173 * the fpstate while returning from the exception handler.
175 * fpstate info and their mapping to IA64 regs:
176 * fpstate REG(BITS) Attribute Comments
177 * cw ar.fcr(0:12) with bits 7 and 6 not used
179 * tag ar.fsr(16:31) with odd numbered bits not used
180 * (read returns 0, writes ignored)
182 * cssel ar.fir(32:47)
183 * dataoff ar.fdr(0:31)
184 * datasel ar.fdr(32:47)
189 * _st[(3+TOS)%8] f11 (f8..f11 from ptregs)
190 * : : : (f12..f15 from live reg)
192 * _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13)
194 * status Same as sw RO
195 * magic 0 as X86_FXSR_MAGIC in ia32
196 * mxcsr Bits(7:15)=ar.fcr(39:47)
197 * Bits(0:5) =ar.fsr(32:37) with bit 6 reserved
198 * _xmm[0..7] f16..f31 (live registers)
200 * Bit(64:127)=f17(0:63)
201 * Bit(0:63)=f16(0:63)
202 * All other fields unused...
206 save_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
208 struct task_struct *tsk = current;
210 struct _fpreg_ia32 *fpregp;
212 unsigned long fsr, fcr, fir, fdr;
213 unsigned long new_fsr;
214 unsigned long num128[2];
215 unsigned long mxcsr=0;
216 int fp_tos, fr8_st_map;
218 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
221 /* Read in fsr, fcr, fir, fdr and copy onto fpstate */
222 fsr = ia64_getreg(_IA64_REG_AR_FSR);
223 fcr = ia64_getreg(_IA64_REG_AR_FCR);
224 fir = ia64_getreg(_IA64_REG_AR_FIR);
225 fdr = ia64_getreg(_IA64_REG_AR_FDR);
228 * We need to clear the exception state before calling the signal handler. Clear
229 * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
232 new_fsr = fsr & ~0x80ff;
233 ia64_setreg(_IA64_REG_AR_FSR, new_fsr);
235 __put_user(fcr & 0xffff, &save->cw);
236 __put_user(fsr & 0xffff, &save->sw);
237 __put_user((fsr>>16) & 0xffff, &save->tag);
238 __put_user(fir, &save->ipoff);
239 __put_user((fir>>32) & 0xffff, &save->cssel);
240 __put_user(fdr, &save->dataoff);
241 __put_user((fdr>>32) & 0xffff, &save->datasel);
242 __put_user(fsr & 0xffff, &save->status);
244 mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
245 __put_user(mxcsr & 0xffff, &save->mxcsr);
246 __put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000
249 * save f8..f11 from pt_regs
250 * save f12..f15 from live register set
253 * Find the location where f8 has to go in fp reg stack. This depends on
254 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
257 fp_tos = (fsr>>11)&0x7;
258 fr8_st_map = (8-fp_tos)&0x7;
259 ptp = ia64_task_regs(tsk);
260 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
261 ia64f2ia32f(fpregp, &ptp->f8);
262 copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
263 ia64f2ia32f(fpregp, &ptp->f9);
264 copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
265 ia64f2ia32f(fpregp, &ptp->f10);
266 copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
267 ia64f2ia32f(fpregp, &ptp->f11);
268 copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
270 ia64_stfe(fpregp, 12);
271 copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
272 ia64_stfe(fpregp, 13);
273 copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
274 ia64_stfe(fpregp, 14);
275 copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
276 ia64_stfe(fpregp, 15);
277 copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
279 ia64_stf8(&num128[0], 16);
280 ia64_stf8(&num128[1], 17);
281 copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
283 ia64_stf8(&num128[0], 18);
284 ia64_stf8(&num128[1], 19);
285 copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
287 ia64_stf8(&num128[0], 20);
288 ia64_stf8(&num128[1], 21);
289 copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
291 ia64_stf8(&num128[0], 22);
292 ia64_stf8(&num128[1], 23);
293 copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
295 ia64_stf8(&num128[0], 24);
296 ia64_stf8(&num128[1], 25);
297 copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
299 ia64_stf8(&num128[0], 26);
300 ia64_stf8(&num128[1], 27);
301 copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
303 ia64_stf8(&num128[0], 28);
304 ia64_stf8(&num128[1], 29);
305 copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
307 ia64_stf8(&num128[0], 30);
308 ia64_stf8(&num128[1], 31);
309 copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
314 restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
316 struct task_struct *tsk = current;
319 unsigned long num128[2];
320 unsigned long num64, mxcsr;
321 struct _fpreg_ia32 *fpregp;
323 unsigned long fsr, fcr, fir, fdr;
324 int fp_tos, fr8_st_map;
326 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
330 * Updating fsr, fcr, fir, fdr.
331 * Just a bit more complicated than save.
332 * - Need to make sure that we don't write any value other than the
333 * specific fpstate info
334 * - Need to make sure that the untouched part of frs, fdr, fir, fcr
335 * should remain same while writing.
336 * So, we do a read, change specific fields and write.
338 fsr = ia64_getreg(_IA64_REG_AR_FSR);
339 fcr = ia64_getreg(_IA64_REG_AR_FCR);
340 fir = ia64_getreg(_IA64_REG_AR_FIR);
341 fdr = ia64_getreg(_IA64_REG_AR_FDR);
343 __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
344 /* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
345 __get_user(lo, (unsigned int __user *)&save->cw);
346 num64 = mxcsr & 0xff10;
347 num64 = (num64 << 32) | (lo & 0x1f3f);
348 fcr = (fcr & (~0xff1000001f3fUL)) | num64;
350 /* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
351 __get_user(lo, (unsigned int __user *)&save->sw);
352 /* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
355 __get_user(hi, (unsigned int __user *)&save->tag);
356 num64 = mxcsr & 0x3f;
357 num64 = (num64 << 16) | (hi & 0xffff);
358 num64 = (num64 << 16) | (lo & 0xffff);
359 fsr = (fsr & (~0x3fffffffffUL)) | num64;
361 /* setting bits 0..47 with cssel and ipoff */
362 __get_user(lo, (unsigned int __user *)&save->ipoff);
363 __get_user(hi, (unsigned int __user *)&save->cssel);
365 num64 = (num64 << 32) | lo;
366 fir = (fir & (~0xffffffffffffUL)) | num64;
368 /* setting bits 0..47 with datasel and dataoff */
369 __get_user(lo, (unsigned int __user *)&save->dataoff);
370 __get_user(hi, (unsigned int __user *)&save->datasel);
372 num64 = (num64 << 32) | lo;
373 fdr = (fdr & (~0xffffffffffffUL)) | num64;
375 ia64_setreg(_IA64_REG_AR_FSR, fsr);
376 ia64_setreg(_IA64_REG_AR_FCR, fcr);
377 ia64_setreg(_IA64_REG_AR_FIR, fir);
378 ia64_setreg(_IA64_REG_AR_FDR, fdr);
381 * restore f8..f11 onto pt_regs
382 * restore f12..f15 onto live registers
385 * Find the location where f8 has to go in fp reg stack. This depends on
386 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
389 fp_tos = (fsr>>11)&0x7;
390 fr8_st_map = (8-fp_tos)&0x7;
391 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
393 ptp = ia64_task_regs(tsk);
394 copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
395 ia32f2ia64f(&ptp->f8, fpregp);
396 copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
397 ia32f2ia64f(&ptp->f9, fpregp);
398 copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
399 ia32f2ia64f(&ptp->f10, fpregp);
400 copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
401 ia32f2ia64f(&ptp->f11, fpregp);
403 copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
404 ia64_ldfe(12, fpregp);
405 copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
406 ia64_ldfe(13, fpregp);
407 copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
408 ia64_ldfe(14, fpregp);
409 copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
410 ia64_ldfe(15, fpregp);
412 copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
413 ia64_ldf8(16, &num128[0]);
414 ia64_ldf8(17, &num128[1]);
416 copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
417 ia64_ldf8(18, &num128[0]);
418 ia64_ldf8(19, &num128[1]);
420 copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
421 ia64_ldf8(20, &num128[0]);
422 ia64_ldf8(21, &num128[1]);
424 copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
425 ia64_ldf8(22, &num128[0]);
426 ia64_ldf8(23, &num128[1]);
428 copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
429 ia64_ldf8(24, &num128[0]);
430 ia64_ldf8(25, &num128[1]);
432 copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
433 ia64_ldf8(26, &num128[0]);
434 ia64_ldf8(27, &num128[1]);
436 copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
437 ia64_ldf8(28, &num128[0]);
438 ia64_ldf8(29, &num128[1]);
440 copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
441 ia64_ldf8(30, &num128[0]);
442 ia64_ldf8(31, &num128[1]);
447 sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
449 if (handler + 1 <= 2)
450 /* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
451 sa->sa.sa_handler = (__sighandler_t) A((int) handler);
453 sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
457 __ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
459 extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
460 sigset_t oldset, set;
462 scr->scratch_unat = 0; /* avoid leaking kernel bits to user level */
463 memset(&set, 0, sizeof(set));
465 memcpy(&set.sig, &sset->sig, sigsetsize);
467 sigdelsetmask(&set, ~_BLOCKABLE);
469 spin_lock_irq(¤t->sighand->siglock);
471 oldset = current->blocked;
472 current->blocked = set;
475 spin_unlock_irq(¤t->sighand->siglock);
478 * The return below usually returns to the signal handler. We need to pre-set the
479 * correct error code here to ensure that the right values get saved in sigcontext
484 current->state = TASK_INTERRUPTIBLE;
486 if (ia64_do_signal(&oldset, scr, 1))
492 ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
496 if (sigsetsize > sizeof(compat_sigset_t))
499 if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
502 return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
506 ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
508 return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
512 sys32_signal (int sig, unsigned int handler)
514 struct k_sigaction new_sa, old_sa;
517 sigact_set_handler(&new_sa, handler, 0);
518 new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
520 ret = do_sigaction(sig, &new_sa, &old_sa);
522 return ret ? ret : IA32_SA_HANDLER(&old_sa);
526 sys32_rt_sigaction (int sig, struct sigaction32 __user *act,
527 struct sigaction32 __user *oact, unsigned int sigsetsize)
529 struct k_sigaction new_ka, old_ka;
530 unsigned int handler, restorer;
533 /* XXX: Don't preclude handling different sized sigset_t's. */
534 if (sigsetsize != sizeof(compat_sigset_t))
538 ret = get_user(handler, &act->sa_handler);
539 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
540 ret |= get_user(restorer, &act->sa_restorer);
541 ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(compat_sigset_t));
545 sigact_set_handler(&new_ka, handler, restorer);
548 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
551 ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
552 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
553 ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
554 ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(compat_sigset_t));
561 sys32_rt_sigprocmask (int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
562 unsigned int sigsetsize)
564 mm_segment_t old_fs = get_fs();
568 if (sigsetsize > sizeof(s))
572 memset(&s, 0, sizeof(s));
573 if (copy_from_user(&s.sig, set, sigsetsize))
577 ret = sys_rt_sigprocmask(how,
578 set ? (sigset_t __user *) &s : NULL,
579 oset ? (sigset_t __user *) &s : NULL, sizeof(s));
584 if (copy_to_user(oset, &s.sig, sigsetsize))
591 sys32_rt_sigqueueinfo (int pid, int sig, compat_siginfo_t __user *uinfo)
593 mm_segment_t old_fs = get_fs();
597 if (copy_siginfo_from_user32(&info, uinfo))
600 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
606 sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
608 struct k_sigaction new_ka, old_ka;
609 unsigned int handler, restorer;
613 compat_old_sigset_t mask;
615 ret = get_user(handler, &act->sa_handler);
616 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
617 ret |= get_user(restorer, &act->sa_restorer);
618 ret |= get_user(mask, &act->sa_mask);
622 sigact_set_handler(&new_ka, handler, restorer);
623 siginitset(&new_ka.sa.sa_mask, mask);
626 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
629 ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
630 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
631 ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
632 ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
639 setup_sigcontext_ia32 (struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
640 struct pt_regs *regs, unsigned long mask)
645 if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc)))
648 err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int __user *)&sc->fs);
649 err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int __user *)&sc->gs);
650 err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int __user *)&sc->es);
651 err |= __put_user(regs->r16 & 0xffff, (unsigned int __user *)&sc->ds);
652 err |= __put_user(regs->r15, &sc->edi);
653 err |= __put_user(regs->r14, &sc->esi);
654 err |= __put_user(regs->r13, &sc->ebp);
655 err |= __put_user(regs->r12, &sc->esp);
656 err |= __put_user(regs->r11, &sc->ebx);
657 err |= __put_user(regs->r10, &sc->edx);
658 err |= __put_user(regs->r9, &sc->ecx);
659 err |= __put_user(regs->r8, &sc->eax);
661 err |= __put_user(current->tss.trap_no, &sc->trapno);
662 err |= __put_user(current->tss.error_code, &sc->err);
664 err |= __put_user(regs->cr_iip, &sc->eip);
665 err |= __put_user(regs->r17 & 0xffff, (unsigned int __user *)&sc->cs);
667 * `eflags' is in an ar register for this context
669 flag = ia64_getreg(_IA64_REG_AR_EFLAG);
670 err |= __put_user((unsigned int)flag, &sc->eflags);
671 err |= __put_user(regs->r12, &sc->esp_at_signal);
672 err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int __user *)&sc->ss);
674 if ( save_ia32_fpstate_live(fpstate) < 0 )
677 err |= __put_user((u32)(u64)fpstate, &sc->fpstate);
680 tmp = save_i387(fpstate);
684 err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
686 /* non-iBCS2 extensions.. */
688 err |= __put_user(mask, &sc->oldmask);
690 err |= __put_user(current->tss.cr2, &sc->cr2);
696 restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 __user *sc, int *peax)
698 unsigned int err = 0;
700 /* Always make any pending restarted system calls return -EINTR */
701 current_thread_info()->restart_block.fn = do_no_restart_syscall;
703 if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
706 #define COPY(ia64x, ia32x) err |= __get_user(regs->ia64x, &sc->ia32x)
708 #define copyseg_gs(tmp) (regs->r16 |= (unsigned long) (tmp) << 48)
709 #define copyseg_fs(tmp) (regs->r16 |= (unsigned long) (tmp) << 32)
710 #define copyseg_cs(tmp) (regs->r17 |= tmp)
711 #define copyseg_ss(tmp) (regs->r17 |= (unsigned long) (tmp) << 16)
712 #define copyseg_es(tmp) (regs->r16 |= (unsigned long) (tmp) << 16)
713 #define copyseg_ds(tmp) (regs->r16 |= tmp)
715 #define COPY_SEG(seg) \
717 unsigned short tmp; \
718 err |= __get_user(tmp, &sc->seg); \
719 copyseg_##seg(tmp); \
721 #define COPY_SEG_STRICT(seg) \
723 unsigned short tmp; \
724 err |= __get_user(tmp, &sc->seg); \
725 copyseg_##seg(tmp|3); \
728 /* To make COPY_SEGs easier, we zero r16, r17 */
746 ia32_load_segment_descriptors(current);
748 unsigned int tmpflags;
752 * IA32 `eflags' is not part of `pt_regs', it's in an ar register which
753 * is part of the thread context. Fortunately, we are executing in the
754 * IA32 process's context.
756 err |= __get_user(tmpflags, &sc->eflags);
757 flag = ia64_getreg(_IA64_REG_AR_EFLAG);
759 flag |= (tmpflags & 0x40DD5);
760 ia64_setreg(_IA64_REG_AR_EFLAG, flag);
762 regs->r1 = -1; /* disable syscall checks, r1 is orig_eax */
766 struct _fpstate_ia32 __user *buf = NULL;
768 err |= get_user(fpstate_ptr, &(sc->fpstate));
769 buf = compat_ptr(fpstate_ptr);
771 err |= restore_ia32_fpstate_live(buf);
777 struct _fpstate * buf;
778 err |= __get_user(buf, &sc->fpstate);
780 if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
782 err |= restore_i387(buf);
787 err |= __get_user(*peax, &sc->eax);
797 * Determine which stack to use..
799 static inline void __user *
800 get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
804 /* Default to using normal stack (truncate off sign-extension of bit 31: */
805 esp = (unsigned int) regs->r12;
807 /* This is the X/Open sanctioned signal stack switching. */
808 if (ka->sa.sa_flags & SA_ONSTACK) {
809 if (!on_sig_stack(esp))
810 esp = current->sas_ss_sp + current->sas_ss_size;
812 /* Legacy stack switching not supported */
814 return (void __user *)((esp - frame_size) & -8ul);
818 setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
820 struct exec_domain *ed = current_thread_info()->exec_domain;
821 struct sigframe_ia32 __user *frame;
824 frame = get_sigframe(ka, regs, sizeof(*frame));
826 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
829 err |= __put_user((ed && ed->signal_invmap && sig < 32
830 ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig);
832 err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]);
834 if (_COMPAT_NSIG_WORDS > 1)
835 err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4,
836 sizeof(frame->extramask));
838 /* Set up to return from userspace. If provided, use a stub
839 already in userspace. */
840 if (ka->sa.sa_flags & SA_RESTORER) {
841 unsigned int restorer = IA32_SA_RESTORER(ka);
842 err |= __put_user(restorer, &frame->pretcode);
844 /* Pointing to restorer in ia32 gate page */
845 err |= __put_user(IA32_GATE_OFFSET, &frame->pretcode);
848 /* This is popl %eax ; movl $,%eax ; int $0x80
849 * and there for historical reasons only.
850 * See arch/i386/kernel/signal.c
853 err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
854 err |= __put_user(__IA32_NR_sigreturn, (int __user *)(frame->retcode+2));
855 err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
860 /* Set up registers for signal handler */
861 regs->r12 = (unsigned long) frame;
862 regs->cr_iip = IA32_SA_HANDLER(ka);
867 regs->eflags &= ~TF_MASK;
871 printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n",
872 current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode);
878 force_sigsegv(sig, current);
883 setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info,
884 sigset_t *set, struct pt_regs * regs)
886 struct exec_domain *ed = current_thread_info()->exec_domain;
887 compat_uptr_t pinfo, puc;
888 struct rt_sigframe_ia32 __user *frame;
891 frame = get_sigframe(ka, regs, sizeof(*frame));
893 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
896 err |= __put_user((ed && ed->signal_invmap
897 && sig < 32 ? ed->signal_invmap[sig] : sig), &frame->sig);
899 pinfo = (long __user) &frame->info;
900 puc = (long __user) &frame->uc;
901 err |= __put_user(pinfo, &frame->pinfo);
902 err |= __put_user(puc, &frame->puc);
903 err |= copy_siginfo_to_user32(&frame->info, info);
905 /* Create the ucontext. */
906 err |= __put_user(0, &frame->uc.uc_flags);
907 err |= __put_user(0, &frame->uc.uc_link);
908 err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
909 err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags);
910 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
911 err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]);
912 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
916 /* Set up to return from userspace. If provided, use a stub
917 already in userspace. */
918 if (ka->sa.sa_flags & SA_RESTORER) {
919 unsigned int restorer = IA32_SA_RESTORER(ka);
920 err |= __put_user(restorer, &frame->pretcode);
922 /* Pointing to rt_restorer in ia32 gate page */
923 err |= __put_user(IA32_GATE_OFFSET + 8, &frame->pretcode);
926 /* This is movl $,%eax ; int $0x80
927 * and there for historical reasons only.
928 * See arch/i386/kernel/signal.c
931 err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
932 err |= __put_user(__IA32_NR_rt_sigreturn, (int __user *)(frame->retcode+1));
933 err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
938 /* Set up registers for signal handler */
939 regs->r12 = (unsigned long) frame;
940 regs->cr_iip = IA32_SA_HANDLER(ka);
945 regs->eflags &= ~TF_MASK;
949 printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n",
950 current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode);
956 force_sigsegv(sig, current);
961 ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
962 sigset_t *set, struct pt_regs *regs)
964 /* Set up the stack frame */
965 if (ka->sa.sa_flags & SA_SIGINFO)
966 return setup_rt_frame_ia32(sig, ka, info, set, regs);
968 return setup_frame_ia32(sig, ka, set, regs);
972 sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
973 int arg6, int arg7, struct pt_regs regs)
975 unsigned long esp = (unsigned int) regs.r12;
976 struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(esp - 8);
980 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
983 if (__get_user(set.sig[0], &frame->sc.oldmask)
984 || (_COMPAT_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask,
985 sizeof(frame->extramask))))
988 sigdelsetmask(&set, ~_BLOCKABLE);
989 spin_lock_irq(¤t->sighand->siglock);
990 current->blocked = set;
992 spin_unlock_irq(¤t->sighand->siglock);
994 if (restore_sigcontext_ia32(®s, &frame->sc, &eax))
999 force_sig(SIGSEGV, current);
1004 sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4,
1005 int arg5, int arg6, int arg7, struct pt_regs regs)
1007 unsigned long esp = (unsigned int) regs.r12;
1008 struct rt_sigframe_ia32 __user *frame = (struct rt_sigframe_ia32 __user *)(esp - 4);
1012 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
1014 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
1017 sigdelsetmask(&set, ~_BLOCKABLE);
1018 spin_lock_irq(¤t->sighand->siglock);
1019 current->blocked = set;
1020 recalc_sigpending();
1021 spin_unlock_irq(¤t->sighand->siglock);
1023 if (restore_sigcontext_ia32(®s, &frame->uc.uc_mcontext, &eax))
1026 /* It is more difficult to avoid calling this function than to
1027 call it and ignore errors. */
1028 do_sigaltstack((stack_t __user *) &frame->uc.uc_stack, NULL, esp);
1033 force_sig(SIGSEGV, current);