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/stddef.h>
22 #include <linux/syscalls.h>
23 #include <linux/unistd.h>
24 #include <linux/wait.h>
25 #include <linux/compat.h>
27 #include <asm/intrinsics.h>
28 #include <asm/uaccess.h>
30 #include <asm/sigcontext.h>
34 #include "../kernel/sigframe.h"
36 #define A(__x) ((unsigned long)(__x))
39 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
41 #define __IA32_NR_sigreturn 119
42 #define __IA32_NR_rt_sigreturn 173
48 struct sigcontext_ia32 sc;
49 struct _fpstate_ia32 fpstate;
50 unsigned int extramask[_COMPAT_NSIG_WORDS-1];
54 struct rt_sigframe_ia32
60 compat_siginfo_t info;
61 struct ucontext_ia32 uc;
62 struct _fpstate_ia32 fpstate;
67 copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
72 if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
75 err = __get_user(to->si_signo, &from->si_signo);
76 err |= __get_user(to->si_errno, &from->si_errno);
77 err |= __get_user(to->si_code, &from->si_code);
80 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
82 switch (to->si_code >> 16) {
84 err |= __get_user(to->si_utime, &from->si_utime);
85 err |= __get_user(to->si_stime, &from->si_stime);
86 err |= __get_user(to->si_status, &from->si_status);
88 err |= __get_user(to->si_pid, &from->si_pid);
89 err |= __get_user(to->si_uid, &from->si_uid);
91 case __SI_FAULT >> 16:
92 err |= __get_user(tmp, &from->si_addr);
93 to->si_addr = (void __user *) tmp;
96 err |= __get_user(to->si_band, &from->si_band);
97 err |= __get_user(to->si_fd, &from->si_fd);
99 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
100 case __SI_MESGQ >> 16:
101 err |= __get_user(to->si_pid, &from->si_pid);
102 err |= __get_user(to->si_uid, &from->si_uid);
103 err |= __get_user(to->si_int, &from->si_int);
111 copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
116 if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
119 /* If you change siginfo_t structure, please be sure
120 this code is fixed accordingly.
121 It should never copy any pad contained in the structure
122 to avoid security leaks, but must copy the generic
123 3 ints plus the relevant union member.
124 This routine must convert siginfo from 64bit to 32bit as well
126 err = __put_user(from->si_signo, &to->si_signo);
127 err |= __put_user(from->si_errno, &to->si_errno);
128 err |= __put_user((short)from->si_code, &to->si_code);
129 if (from->si_code < 0)
130 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
132 switch (from->si_code >> 16) {
133 case __SI_CHLD >> 16:
134 err |= __put_user(from->si_utime, &to->si_utime);
135 err |= __put_user(from->si_stime, &to->si_stime);
136 err |= __put_user(from->si_status, &to->si_status);
138 err |= __put_user(from->si_pid, &to->si_pid);
139 err |= __put_user(from->si_uid, &to->si_uid);
141 case __SI_FAULT >> 16:
142 /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
143 err |= __put_user(from->_sifields._pad[0], &to->si_addr);
145 case __SI_POLL >> 16:
146 err |= __put_user(from->si_band, &to->si_band);
147 err |= __put_user(from->si_fd, &to->si_fd);
149 case __SI_TIMER >> 16:
150 err |= __put_user(from->si_tid, &to->si_tid);
151 err |= __put_user(from->si_overrun, &to->si_overrun);
152 addr = (unsigned long) from->si_ptr;
153 err |= __put_user(addr, &to->si_ptr);
155 case __SI_RT >> 16: /* Not generated by the kernel as of now. */
156 case __SI_MESGQ >> 16:
157 err |= __put_user(from->si_uid, &to->si_uid);
158 err |= __put_user(from->si_pid, &to->si_pid);
159 addr = (unsigned long) from->si_ptr;
160 err |= __put_user(addr, &to->si_ptr);
169 * SAVE and RESTORE of ia32 fpstate info, from ia64 current state
170 * Used in exception handler to pass the fpstate to the user, and restore
171 * the fpstate while returning from the exception handler.
173 * fpstate info and their mapping to IA64 regs:
174 * fpstate REG(BITS) Attribute Comments
175 * cw ar.fcr(0:12) with bits 7 and 6 not used
177 * tag ar.fsr(16:31) with odd numbered bits not used
178 * (read returns 0, writes ignored)
180 * cssel ar.fir(32:47)
181 * dataoff ar.fdr(0:31)
182 * datasel ar.fdr(32:47)
187 * _st[(3+TOS)%8] f11 (f8..f11 from ptregs)
188 * : : : (f12..f15 from live reg)
190 * _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13)
192 * status Same as sw RO
193 * magic 0 as X86_FXSR_MAGIC in ia32
194 * mxcsr Bits(7:15)=ar.fcr(39:47)
195 * Bits(0:5) =ar.fsr(32:37) with bit 6 reserved
196 * _xmm[0..7] f16..f31 (live registers)
198 * Bit(64:127)=f17(0:63)
199 * Bit(0:63)=f16(0:63)
200 * All other fields unused...
204 save_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
206 struct task_struct *tsk = current;
208 struct _fpreg_ia32 *fpregp;
210 unsigned long fsr, fcr, fir, fdr;
211 unsigned long new_fsr;
212 unsigned long num128[2];
213 unsigned long mxcsr=0;
214 int fp_tos, fr8_st_map;
216 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
219 /* Read in fsr, fcr, fir, fdr and copy onto fpstate */
220 fsr = ia64_getreg(_IA64_REG_AR_FSR);
221 fcr = ia64_getreg(_IA64_REG_AR_FCR);
222 fir = ia64_getreg(_IA64_REG_AR_FIR);
223 fdr = ia64_getreg(_IA64_REG_AR_FDR);
226 * We need to clear the exception state before calling the signal handler. Clear
227 * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
230 new_fsr = fsr & ~0x80ff;
231 ia64_setreg(_IA64_REG_AR_FSR, new_fsr);
233 __put_user(fcr & 0xffff, &save->cw);
234 __put_user(fsr & 0xffff, &save->sw);
235 __put_user((fsr>>16) & 0xffff, &save->tag);
236 __put_user(fir, &save->ipoff);
237 __put_user((fir>>32) & 0xffff, &save->cssel);
238 __put_user(fdr, &save->dataoff);
239 __put_user((fdr>>32) & 0xffff, &save->datasel);
240 __put_user(fsr & 0xffff, &save->status);
242 mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
243 __put_user(mxcsr & 0xffff, &save->mxcsr);
244 __put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000
247 * save f8..f11 from pt_regs
248 * save f12..f15 from live register set
251 * Find the location where f8 has to go in fp reg stack. This depends on
252 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
255 fp_tos = (fsr>>11)&0x7;
256 fr8_st_map = (8-fp_tos)&0x7;
257 ptp = task_pt_regs(tsk);
258 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
259 ia64f2ia32f(fpregp, &ptp->f8);
260 copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
261 ia64f2ia32f(fpregp, &ptp->f9);
262 copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
263 ia64f2ia32f(fpregp, &ptp->f10);
264 copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
265 ia64f2ia32f(fpregp, &ptp->f11);
266 copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
268 ia64_stfe(fpregp, 12);
269 copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
270 ia64_stfe(fpregp, 13);
271 copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
272 ia64_stfe(fpregp, 14);
273 copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
274 ia64_stfe(fpregp, 15);
275 copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
277 ia64_stf8(&num128[0], 16);
278 ia64_stf8(&num128[1], 17);
279 copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
281 ia64_stf8(&num128[0], 18);
282 ia64_stf8(&num128[1], 19);
283 copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
285 ia64_stf8(&num128[0], 20);
286 ia64_stf8(&num128[1], 21);
287 copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
289 ia64_stf8(&num128[0], 22);
290 ia64_stf8(&num128[1], 23);
291 copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
293 ia64_stf8(&num128[0], 24);
294 ia64_stf8(&num128[1], 25);
295 copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
297 ia64_stf8(&num128[0], 26);
298 ia64_stf8(&num128[1], 27);
299 copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
301 ia64_stf8(&num128[0], 28);
302 ia64_stf8(&num128[1], 29);
303 copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
305 ia64_stf8(&num128[0], 30);
306 ia64_stf8(&num128[1], 31);
307 copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
312 restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
314 struct task_struct *tsk = current;
317 unsigned long num128[2];
318 unsigned long num64, mxcsr;
319 struct _fpreg_ia32 *fpregp;
321 unsigned long fsr, fcr, fir, fdr;
322 int fp_tos, fr8_st_map;
324 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
328 * Updating fsr, fcr, fir, fdr.
329 * Just a bit more complicated than save.
330 * - Need to make sure that we don't write any value other than the
331 * specific fpstate info
332 * - Need to make sure that the untouched part of frs, fdr, fir, fcr
333 * should remain same while writing.
334 * So, we do a read, change specific fields and write.
336 fsr = ia64_getreg(_IA64_REG_AR_FSR);
337 fcr = ia64_getreg(_IA64_REG_AR_FCR);
338 fir = ia64_getreg(_IA64_REG_AR_FIR);
339 fdr = ia64_getreg(_IA64_REG_AR_FDR);
341 __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
342 /* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
343 __get_user(lo, (unsigned int __user *)&save->cw);
344 num64 = mxcsr & 0xff10;
345 num64 = (num64 << 32) | (lo & 0x1f3f);
346 fcr = (fcr & (~0xff1000001f3fUL)) | num64;
348 /* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
349 __get_user(lo, (unsigned int __user *)&save->sw);
350 /* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
353 __get_user(hi, (unsigned int __user *)&save->tag);
354 num64 = mxcsr & 0x3f;
355 num64 = (num64 << 16) | (hi & 0xffff);
356 num64 = (num64 << 16) | (lo & 0xffff);
357 fsr = (fsr & (~0x3fffffffffUL)) | num64;
359 /* setting bits 0..47 with cssel and ipoff */
360 __get_user(lo, (unsigned int __user *)&save->ipoff);
361 __get_user(hi, (unsigned int __user *)&save->cssel);
363 num64 = (num64 << 32) | lo;
364 fir = (fir & (~0xffffffffffffUL)) | num64;
366 /* setting bits 0..47 with datasel and dataoff */
367 __get_user(lo, (unsigned int __user *)&save->dataoff);
368 __get_user(hi, (unsigned int __user *)&save->datasel);
370 num64 = (num64 << 32) | lo;
371 fdr = (fdr & (~0xffffffffffffUL)) | num64;
373 ia64_setreg(_IA64_REG_AR_FSR, fsr);
374 ia64_setreg(_IA64_REG_AR_FCR, fcr);
375 ia64_setreg(_IA64_REG_AR_FIR, fir);
376 ia64_setreg(_IA64_REG_AR_FDR, fdr);
379 * restore f8..f11 onto pt_regs
380 * restore f12..f15 onto live registers
383 * Find the location where f8 has to go in fp reg stack. This depends on
384 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
387 fp_tos = (fsr>>11)&0x7;
388 fr8_st_map = (8-fp_tos)&0x7;
389 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
391 ptp = task_pt_regs(tsk);
392 copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
393 ia32f2ia64f(&ptp->f8, fpregp);
394 copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
395 ia32f2ia64f(&ptp->f9, fpregp);
396 copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
397 ia32f2ia64f(&ptp->f10, fpregp);
398 copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
399 ia32f2ia64f(&ptp->f11, fpregp);
401 copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
402 ia64_ldfe(12, fpregp);
403 copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
404 ia64_ldfe(13, fpregp);
405 copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
406 ia64_ldfe(14, fpregp);
407 copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
408 ia64_ldfe(15, fpregp);
410 copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
411 ia64_ldf8(16, &num128[0]);
412 ia64_ldf8(17, &num128[1]);
414 copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
415 ia64_ldf8(18, &num128[0]);
416 ia64_ldf8(19, &num128[1]);
418 copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
419 ia64_ldf8(20, &num128[0]);
420 ia64_ldf8(21, &num128[1]);
422 copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
423 ia64_ldf8(22, &num128[0]);
424 ia64_ldf8(23, &num128[1]);
426 copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
427 ia64_ldf8(24, &num128[0]);
428 ia64_ldf8(25, &num128[1]);
430 copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
431 ia64_ldf8(26, &num128[0]);
432 ia64_ldf8(27, &num128[1]);
434 copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
435 ia64_ldf8(28, &num128[0]);
436 ia64_ldf8(29, &num128[1]);
438 copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
439 ia64_ldf8(30, &num128[0]);
440 ia64_ldf8(31, &num128[1]);
445 sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
447 if (handler + 1 <= 2)
448 /* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
449 sa->sa.sa_handler = (__sighandler_t) A((int) handler);
451 sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
455 __ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
457 extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
458 sigset_t oldset, set;
460 scr->scratch_unat = 0; /* avoid leaking kernel bits to user level */
461 memset(&set, 0, sizeof(set));
463 memcpy(&set.sig, &sset->sig, sigsetsize);
465 sigdelsetmask(&set, ~_BLOCKABLE);
467 spin_lock_irq(¤t->sighand->siglock);
469 oldset = current->blocked;
470 current->blocked = set;
473 spin_unlock_irq(¤t->sighand->siglock);
476 * The return below usually returns to the signal handler. We need to pre-set the
477 * correct error code here to ensure that the right values get saved in sigcontext
482 current->state = TASK_INTERRUPTIBLE;
484 if (ia64_do_signal(&oldset, scr, 1))
490 ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
494 if (sigsetsize > sizeof(compat_sigset_t))
497 if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
500 return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
504 ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
506 return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
510 sys32_signal (int sig, unsigned int handler)
512 struct k_sigaction new_sa, old_sa;
515 sigact_set_handler(&new_sa, handler, 0);
516 new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
517 sigemptyset(&new_sa.sa.sa_mask);
519 ret = do_sigaction(sig, &new_sa, &old_sa);
521 return ret ? ret : IA32_SA_HANDLER(&old_sa);
525 sys32_rt_sigaction (int sig, struct sigaction32 __user *act,
526 struct sigaction32 __user *oact, unsigned int sigsetsize)
528 struct k_sigaction new_ka, old_ka;
529 unsigned int handler, restorer;
532 /* XXX: Don't preclude handling different sized sigset_t's. */
533 if (sigsetsize != sizeof(compat_sigset_t))
537 ret = get_user(handler, &act->sa_handler);
538 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
539 ret |= get_user(restorer, &act->sa_restorer);
540 ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(compat_sigset_t));
544 sigact_set_handler(&new_ka, handler, restorer);
547 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
550 ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
551 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
552 ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
553 ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(compat_sigset_t));
560 sys32_rt_sigprocmask (int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
561 unsigned int sigsetsize)
563 mm_segment_t old_fs = get_fs();
567 if (sigsetsize > sizeof(s))
571 memset(&s, 0, sizeof(s));
572 if (copy_from_user(&s.sig, set, sigsetsize))
576 ret = sys_rt_sigprocmask(how,
577 set ? (sigset_t __user *) &s : NULL,
578 oset ? (sigset_t __user *) &s : NULL, sizeof(s));
583 if (copy_to_user(oset, &s.sig, sigsetsize))
590 sys32_rt_sigqueueinfo (int pid, int sig, compat_siginfo_t __user *uinfo)
592 mm_segment_t old_fs = get_fs();
596 if (copy_siginfo_from_user32(&info, uinfo))
599 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
605 sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
607 struct k_sigaction new_ka, old_ka;
608 unsigned int handler, restorer;
612 compat_old_sigset_t mask;
614 ret = get_user(handler, &act->sa_handler);
615 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
616 ret |= get_user(restorer, &act->sa_restorer);
617 ret |= get_user(mask, &act->sa_mask);
621 sigact_set_handler(&new_ka, handler, restorer);
622 siginitset(&new_ka.sa.sa_mask, mask);
625 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
628 ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
629 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
630 ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
631 ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
638 setup_sigcontext_ia32 (struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
639 struct pt_regs *regs, unsigned long mask)
644 if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc)))
647 err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int __user *)&sc->fs);
648 err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int __user *)&sc->gs);
649 err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int __user *)&sc->es);
650 err |= __put_user(regs->r16 & 0xffff, (unsigned int __user *)&sc->ds);
651 err |= __put_user(regs->r15, &sc->edi);
652 err |= __put_user(regs->r14, &sc->esi);
653 err |= __put_user(regs->r13, &sc->ebp);
654 err |= __put_user(regs->r12, &sc->esp);
655 err |= __put_user(regs->r11, &sc->ebx);
656 err |= __put_user(regs->r10, &sc->edx);
657 err |= __put_user(regs->r9, &sc->ecx);
658 err |= __put_user(regs->r8, &sc->eax);
660 err |= __put_user(current->tss.trap_no, &sc->trapno);
661 err |= __put_user(current->tss.error_code, &sc->err);
663 err |= __put_user(regs->cr_iip, &sc->eip);
664 err |= __put_user(regs->r17 & 0xffff, (unsigned int __user *)&sc->cs);
666 * `eflags' is in an ar register for this context
668 flag = ia64_getreg(_IA64_REG_AR_EFLAG);
669 err |= __put_user((unsigned int)flag, &sc->eflags);
670 err |= __put_user(regs->r12, &sc->esp_at_signal);
671 err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int __user *)&sc->ss);
673 if ( save_ia32_fpstate_live(fpstate) < 0 )
676 err |= __put_user((u32)(u64)fpstate, &sc->fpstate);
679 tmp = save_i387(fpstate);
683 err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
685 /* non-iBCS2 extensions.. */
687 err |= __put_user(mask, &sc->oldmask);
689 err |= __put_user(current->tss.cr2, &sc->cr2);
695 restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 __user *sc, int *peax)
697 unsigned int err = 0;
699 /* Always make any pending restarted system calls return -EINTR */
700 current_thread_info()->restart_block.fn = do_no_restart_syscall;
702 if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
705 #define COPY(ia64x, ia32x) err |= __get_user(regs->ia64x, &sc->ia32x)
707 #define copyseg_gs(tmp) (regs->r16 |= (unsigned long) (tmp) << 48)
708 #define copyseg_fs(tmp) (regs->r16 |= (unsigned long) (tmp) << 32)
709 #define copyseg_cs(tmp) (regs->r17 |= tmp)
710 #define copyseg_ss(tmp) (regs->r17 |= (unsigned long) (tmp) << 16)
711 #define copyseg_es(tmp) (regs->r16 |= (unsigned long) (tmp) << 16)
712 #define copyseg_ds(tmp) (regs->r16 |= tmp)
714 #define COPY_SEG(seg) \
716 unsigned short tmp; \
717 err |= __get_user(tmp, &sc->seg); \
718 copyseg_##seg(tmp); \
720 #define COPY_SEG_STRICT(seg) \
722 unsigned short tmp; \
723 err |= __get_user(tmp, &sc->seg); \
724 copyseg_##seg(tmp|3); \
727 /* To make COPY_SEGs easier, we zero r16, r17 */
745 ia32_load_segment_descriptors(current);
747 unsigned int tmpflags;
751 * IA32 `eflags' is not part of `pt_regs', it's in an ar register which
752 * is part of the thread context. Fortunately, we are executing in the
753 * IA32 process's context.
755 err |= __get_user(tmpflags, &sc->eflags);
756 flag = ia64_getreg(_IA64_REG_AR_EFLAG);
758 flag |= (tmpflags & 0x40DD5);
759 ia64_setreg(_IA64_REG_AR_EFLAG, flag);
761 regs->r1 = -1; /* disable syscall checks, r1 is orig_eax */
765 struct _fpstate_ia32 __user *buf = NULL;
767 err |= get_user(fpstate_ptr, &(sc->fpstate));
768 buf = compat_ptr(fpstate_ptr);
770 err |= restore_ia32_fpstate_live(buf);
776 struct _fpstate * buf;
777 err |= __get_user(buf, &sc->fpstate);
779 if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
781 err |= restore_i387(buf);
786 err |= __get_user(*peax, &sc->eax);
796 * Determine which stack to use..
798 static inline void __user *
799 get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
803 /* Default to using normal stack (truncate off sign-extension of bit 31: */
804 esp = (unsigned int) regs->r12;
806 /* This is the X/Open sanctioned signal stack switching. */
807 if (ka->sa.sa_flags & SA_ONSTACK) {
808 if (!on_sig_stack(esp))
809 esp = current->sas_ss_sp + current->sas_ss_size;
811 /* Legacy stack switching not supported */
813 return (void __user *)((esp - frame_size) & -8ul);
817 setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
819 struct exec_domain *ed = current_thread_info()->exec_domain;
820 struct sigframe_ia32 __user *frame;
823 frame = get_sigframe(ka, regs, sizeof(*frame));
825 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
828 err |= __put_user((ed && ed->signal_invmap && sig < 32
829 ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig);
831 err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]);
833 if (_COMPAT_NSIG_WORDS > 1)
834 err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4,
835 sizeof(frame->extramask));
837 /* Set up to return from userspace. If provided, use a stub
838 already in userspace. */
839 if (ka->sa.sa_flags & SA_RESTORER) {
840 unsigned int restorer = IA32_SA_RESTORER(ka);
841 err |= __put_user(restorer, &frame->pretcode);
843 /* Pointing to restorer in ia32 gate page */
844 err |= __put_user(IA32_GATE_OFFSET, &frame->pretcode);
847 /* This is popl %eax ; movl $,%eax ; int $0x80
848 * and there for historical reasons only.
849 * See arch/i386/kernel/signal.c
852 err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
853 err |= __put_user(__IA32_NR_sigreturn, (int __user *)(frame->retcode+2));
854 err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
859 /* Set up registers for signal handler */
860 regs->r12 = (unsigned long) frame;
861 regs->cr_iip = IA32_SA_HANDLER(ka);
866 regs->eflags &= ~TF_MASK;
870 printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n",
871 current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode);
877 force_sigsegv(sig, current);
882 setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info,
883 sigset_t *set, struct pt_regs * regs)
885 struct exec_domain *ed = current_thread_info()->exec_domain;
886 compat_uptr_t pinfo, puc;
887 struct rt_sigframe_ia32 __user *frame;
890 frame = get_sigframe(ka, regs, sizeof(*frame));
892 if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
895 err |= __put_user((ed && ed->signal_invmap
896 && sig < 32 ? ed->signal_invmap[sig] : sig), &frame->sig);
898 pinfo = (long __user) &frame->info;
899 puc = (long __user) &frame->uc;
900 err |= __put_user(pinfo, &frame->pinfo);
901 err |= __put_user(puc, &frame->puc);
902 err |= copy_siginfo_to_user32(&frame->info, info);
904 /* Create the ucontext. */
905 err |= __put_user(0, &frame->uc.uc_flags);
906 err |= __put_user(0, &frame->uc.uc_link);
907 err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
908 err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags);
909 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
910 err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]);
911 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
915 /* Set up to return from userspace. If provided, use a stub
916 already in userspace. */
917 if (ka->sa.sa_flags & SA_RESTORER) {
918 unsigned int restorer = IA32_SA_RESTORER(ka);
919 err |= __put_user(restorer, &frame->pretcode);
921 /* Pointing to rt_restorer in ia32 gate page */
922 err |= __put_user(IA32_GATE_OFFSET + 8, &frame->pretcode);
925 /* This is movl $,%eax ; int $0x80
926 * and there for historical reasons only.
927 * See arch/i386/kernel/signal.c
930 err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
931 err |= __put_user(__IA32_NR_rt_sigreturn, (int __user *)(frame->retcode+1));
932 err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
937 /* Set up registers for signal handler */
938 regs->r12 = (unsigned long) frame;
939 regs->cr_iip = IA32_SA_HANDLER(ka);
944 regs->eflags &= ~TF_MASK;
948 printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n",
949 current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode);
955 force_sigsegv(sig, current);
960 ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
961 sigset_t *set, struct pt_regs *regs)
963 /* Set up the stack frame */
964 if (ka->sa.sa_flags & SA_SIGINFO)
965 return setup_rt_frame_ia32(sig, ka, info, set, regs);
967 return setup_frame_ia32(sig, ka, set, regs);
971 sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
972 int arg6, int arg7, struct pt_regs regs)
974 unsigned long esp = (unsigned int) regs.r12;
975 struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(esp - 8);
979 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
982 if (__get_user(set.sig[0], &frame->sc.oldmask)
983 || (_COMPAT_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask,
984 sizeof(frame->extramask))))
987 sigdelsetmask(&set, ~_BLOCKABLE);
988 spin_lock_irq(¤t->sighand->siglock);
989 current->blocked = set;
991 spin_unlock_irq(¤t->sighand->siglock);
993 if (restore_sigcontext_ia32(®s, &frame->sc, &eax))
998 force_sig(SIGSEGV, current);
1003 sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4,
1004 int arg5, int arg6, int arg7, struct pt_regs regs)
1006 unsigned long esp = (unsigned int) regs.r12;
1007 struct rt_sigframe_ia32 __user *frame = (struct rt_sigframe_ia32 __user *)(esp - 4);
1011 if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
1013 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
1016 sigdelsetmask(&set, ~_BLOCKABLE);
1017 spin_lock_irq(¤t->sighand->siglock);
1018 current->blocked = set;
1019 recalc_sigpending();
1020 spin_unlock_irq(¤t->sighand->siglock);
1022 if (restore_sigcontext_ia32(®s, &frame->uc.uc_mcontext, &eax))
1025 /* It is more difficult to avoid calling this function than to
1026 call it and ignore errors. */
1027 do_sigaltstack((stack_t __user *) &frame->uc.uc_stack, NULL, esp);
1032 force_sig(SIGSEGV, current);