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>
35 #include "../kernel/sigframe.h"
37 #define A(__x) ((unsigned long)(__x))
40 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
42 #define __IA32_NR_sigreturn 119
43 #define __IA32_NR_rt_sigreturn 173
49 struct sigcontext_ia32 sc;
50 struct _fpstate_ia32 fpstate;
51 unsigned int extramask[_COMPAT_NSIG_WORDS-1];
55 struct rt_sigframe_ia32
61 compat_siginfo_t info;
62 struct ucontext_ia32 uc;
63 struct _fpstate_ia32 fpstate;
68 copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
73 if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
76 err = __get_user(to->si_signo, &from->si_signo);
77 err |= __get_user(to->si_errno, &from->si_errno);
78 err |= __get_user(to->si_code, &from->si_code);
81 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
83 switch (to->si_code >> 16) {
85 err |= __get_user(to->si_utime, &from->si_utime);
86 err |= __get_user(to->si_stime, &from->si_stime);
87 err |= __get_user(to->si_status, &from->si_status);
89 err |= __get_user(to->si_pid, &from->si_pid);
90 err |= __get_user(to->si_uid, &from->si_uid);
92 case __SI_FAULT >> 16:
93 err |= __get_user(tmp, &from->si_addr);
94 to->si_addr = (void __user *) tmp;
97 err |= __get_user(to->si_band, &from->si_band);
98 err |= __get_user(to->si_fd, &from->si_fd);
100 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
101 case __SI_MESGQ >> 16:
102 err |= __get_user(to->si_pid, &from->si_pid);
103 err |= __get_user(to->si_uid, &from->si_uid);
104 err |= __get_user(to->si_int, &from->si_int);
112 copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
117 if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
120 /* If you change siginfo_t structure, please be sure
121 this code is fixed accordingly.
122 It should never copy any pad contained in the structure
123 to avoid security leaks, but must copy the generic
124 3 ints plus the relevant union member.
125 This routine must convert siginfo from 64bit to 32bit as well
127 err = __put_user(from->si_signo, &to->si_signo);
128 err |= __put_user(from->si_errno, &to->si_errno);
129 err |= __put_user((short)from->si_code, &to->si_code);
130 if (from->si_code < 0)
131 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
133 switch (from->si_code >> 16) {
134 case __SI_CHLD >> 16:
135 err |= __put_user(from->si_utime, &to->si_utime);
136 err |= __put_user(from->si_stime, &to->si_stime);
137 err |= __put_user(from->si_status, &to->si_status);
139 err |= __put_user(from->si_pid, &to->si_pid);
140 err |= __put_user(from->si_uid, &to->si_uid);
142 case __SI_FAULT >> 16:
143 /* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
144 err |= __put_user(from->_sifields._pad[0], &to->si_addr);
146 case __SI_POLL >> 16:
147 err |= __put_user(from->si_band, &to->si_band);
148 err |= __put_user(from->si_fd, &to->si_fd);
150 case __SI_TIMER >> 16:
151 err |= __put_user(from->si_tid, &to->si_tid);
152 err |= __put_user(from->si_overrun, &to->si_overrun);
153 addr = (unsigned long) from->si_ptr;
154 err |= __put_user(addr, &to->si_ptr);
156 case __SI_RT >> 16: /* Not generated by the kernel as of now. */
157 case __SI_MESGQ >> 16:
158 err |= __put_user(from->si_uid, &to->si_uid);
159 err |= __put_user(from->si_pid, &to->si_pid);
160 addr = (unsigned long) from->si_ptr;
161 err |= __put_user(addr, &to->si_ptr);
170 * SAVE and RESTORE of ia32 fpstate info, from ia64 current state
171 * Used in exception handler to pass the fpstate to the user, and restore
172 * the fpstate while returning from the exception handler.
174 * fpstate info and their mapping to IA64 regs:
175 * fpstate REG(BITS) Attribute Comments
176 * cw ar.fcr(0:12) with bits 7 and 6 not used
178 * tag ar.fsr(16:31) with odd numbered bits not used
179 * (read returns 0, writes ignored)
181 * cssel ar.fir(32:47)
182 * dataoff ar.fdr(0:31)
183 * datasel ar.fdr(32:47)
188 * _st[(3+TOS)%8] f11 (f8..f11 from ptregs)
189 * : : : (f12..f15 from live reg)
191 * _st[(7+TOS)%8] f15 TOS=sw.top(bits11:13)
193 * status Same as sw RO
194 * magic 0 as X86_FXSR_MAGIC in ia32
195 * mxcsr Bits(7:15)=ar.fcr(39:47)
196 * Bits(0:5) =ar.fsr(32:37) with bit 6 reserved
197 * _xmm[0..7] f16..f31 (live registers)
199 * Bit(64:127)=f17(0:63)
200 * Bit(0:63)=f16(0:63)
201 * All other fields unused...
205 save_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
207 struct task_struct *tsk = current;
209 struct _fpreg_ia32 *fpregp;
211 unsigned long fsr, fcr, fir, fdr;
212 unsigned long new_fsr;
213 unsigned long num128[2];
214 unsigned long mxcsr=0;
215 int fp_tos, fr8_st_map;
217 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
220 /* Read in fsr, fcr, fir, fdr and copy onto fpstate */
221 fsr = ia64_getreg(_IA64_REG_AR_FSR);
222 fcr = ia64_getreg(_IA64_REG_AR_FCR);
223 fir = ia64_getreg(_IA64_REG_AR_FIR);
224 fdr = ia64_getreg(_IA64_REG_AR_FDR);
227 * We need to clear the exception state before calling the signal handler. Clear
228 * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
231 new_fsr = fsr & ~0x80ff;
232 ia64_setreg(_IA64_REG_AR_FSR, new_fsr);
234 __put_user(fcr & 0xffff, &save->cw);
235 __put_user(fsr & 0xffff, &save->sw);
236 __put_user((fsr>>16) & 0xffff, &save->tag);
237 __put_user(fir, &save->ipoff);
238 __put_user((fir>>32) & 0xffff, &save->cssel);
239 __put_user(fdr, &save->dataoff);
240 __put_user((fdr>>32) & 0xffff, &save->datasel);
241 __put_user(fsr & 0xffff, &save->status);
243 mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
244 __put_user(mxcsr & 0xffff, &save->mxcsr);
245 __put_user( 0, &save->magic); //#define X86_FXSR_MAGIC 0x0000
248 * save f8..f11 from pt_regs
249 * save f12..f15 from live register set
252 * Find the location where f8 has to go in fp reg stack. This depends on
253 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
256 fp_tos = (fsr>>11)&0x7;
257 fr8_st_map = (8-fp_tos)&0x7;
258 ptp = ia64_task_regs(tsk);
259 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
260 ia64f2ia32f(fpregp, &ptp->f8);
261 copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
262 ia64f2ia32f(fpregp, &ptp->f9);
263 copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
264 ia64f2ia32f(fpregp, &ptp->f10);
265 copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
266 ia64f2ia32f(fpregp, &ptp->f11);
267 copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
269 ia64_stfe(fpregp, 12);
270 copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
271 ia64_stfe(fpregp, 13);
272 copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
273 ia64_stfe(fpregp, 14);
274 copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
275 ia64_stfe(fpregp, 15);
276 copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
278 ia64_stf8(&num128[0], 16);
279 ia64_stf8(&num128[1], 17);
280 copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
282 ia64_stf8(&num128[0], 18);
283 ia64_stf8(&num128[1], 19);
284 copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
286 ia64_stf8(&num128[0], 20);
287 ia64_stf8(&num128[1], 21);
288 copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
290 ia64_stf8(&num128[0], 22);
291 ia64_stf8(&num128[1], 23);
292 copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
294 ia64_stf8(&num128[0], 24);
295 ia64_stf8(&num128[1], 25);
296 copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
298 ia64_stf8(&num128[0], 26);
299 ia64_stf8(&num128[1], 27);
300 copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
302 ia64_stf8(&num128[0], 28);
303 ia64_stf8(&num128[1], 29);
304 copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
306 ia64_stf8(&num128[0], 30);
307 ia64_stf8(&num128[1], 31);
308 copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
313 restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
315 struct task_struct *tsk = current;
318 unsigned long num128[2];
319 unsigned long num64, mxcsr;
320 struct _fpreg_ia32 *fpregp;
322 unsigned long fsr, fcr, fir, fdr;
323 int fp_tos, fr8_st_map;
325 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
329 * Updating fsr, fcr, fir, fdr.
330 * Just a bit more complicated than save.
331 * - Need to make sure that we don't write any value other than the
332 * specific fpstate info
333 * - Need to make sure that the untouched part of frs, fdr, fir, fcr
334 * should remain same while writing.
335 * So, we do a read, change specific fields and write.
337 fsr = ia64_getreg(_IA64_REG_AR_FSR);
338 fcr = ia64_getreg(_IA64_REG_AR_FCR);
339 fir = ia64_getreg(_IA64_REG_AR_FIR);
340 fdr = ia64_getreg(_IA64_REG_AR_FDR);
342 __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
343 /* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
344 __get_user(lo, (unsigned int __user *)&save->cw);
345 num64 = mxcsr & 0xff10;
346 num64 = (num64 << 32) | (lo & 0x1f3f);
347 fcr = (fcr & (~0xff1000001f3fUL)) | num64;
349 /* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
350 __get_user(lo, (unsigned int __user *)&save->sw);
351 /* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
354 __get_user(hi, (unsigned int __user *)&save->tag);
355 num64 = mxcsr & 0x3f;
356 num64 = (num64 << 16) | (hi & 0xffff);
357 num64 = (num64 << 16) | (lo & 0xffff);
358 fsr = (fsr & (~0x3fffffffffUL)) | num64;
360 /* setting bits 0..47 with cssel and ipoff */
361 __get_user(lo, (unsigned int __user *)&save->ipoff);
362 __get_user(hi, (unsigned int __user *)&save->cssel);
364 num64 = (num64 << 32) | lo;
365 fir = (fir & (~0xffffffffffffUL)) | num64;
367 /* setting bits 0..47 with datasel and dataoff */
368 __get_user(lo, (unsigned int __user *)&save->dataoff);
369 __get_user(hi, (unsigned int __user *)&save->datasel);
371 num64 = (num64 << 32) | lo;
372 fdr = (fdr & (~0xffffffffffffUL)) | num64;
374 ia64_setreg(_IA64_REG_AR_FSR, fsr);
375 ia64_setreg(_IA64_REG_AR_FCR, fcr);
376 ia64_setreg(_IA64_REG_AR_FIR, fir);
377 ia64_setreg(_IA64_REG_AR_FDR, fdr);
380 * restore f8..f11 onto pt_regs
381 * restore f12..f15 onto live registers
384 * Find the location where f8 has to go in fp reg stack. This depends on
385 * TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
388 fp_tos = (fsr>>11)&0x7;
389 fr8_st_map = (8-fp_tos)&0x7;
390 fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
392 ptp = ia64_task_regs(tsk);
393 copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
394 ia32f2ia64f(&ptp->f8, fpregp);
395 copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
396 ia32f2ia64f(&ptp->f9, fpregp);
397 copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
398 ia32f2ia64f(&ptp->f10, fpregp);
399 copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
400 ia32f2ia64f(&ptp->f11, fpregp);
402 copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
403 ia64_ldfe(12, fpregp);
404 copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
405 ia64_ldfe(13, fpregp);
406 copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
407 ia64_ldfe(14, fpregp);
408 copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
409 ia64_ldfe(15, fpregp);
411 copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
412 ia64_ldf8(16, &num128[0]);
413 ia64_ldf8(17, &num128[1]);
415 copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
416 ia64_ldf8(18, &num128[0]);
417 ia64_ldf8(19, &num128[1]);
419 copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
420 ia64_ldf8(20, &num128[0]);
421 ia64_ldf8(21, &num128[1]);
423 copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
424 ia64_ldf8(22, &num128[0]);
425 ia64_ldf8(23, &num128[1]);
427 copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
428 ia64_ldf8(24, &num128[0]);
429 ia64_ldf8(25, &num128[1]);
431 copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
432 ia64_ldf8(26, &num128[0]);
433 ia64_ldf8(27, &num128[1]);
435 copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
436 ia64_ldf8(28, &num128[0]);
437 ia64_ldf8(29, &num128[1]);
439 copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
440 ia64_ldf8(30, &num128[0]);
441 ia64_ldf8(31, &num128[1]);
446 sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
448 if (handler + 1 <= 2)
449 /* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
450 sa->sa.sa_handler = (__sighandler_t) A((int) handler);
452 sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
456 __ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
458 extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
459 sigset_t oldset, set;
461 scr->scratch_unat = 0; /* avoid leaking kernel bits to user level */
462 memset(&set, 0, sizeof(set));
464 memcpy(&set.sig, &sset->sig, sigsetsize);
466 sigdelsetmask(&set, ~_BLOCKABLE);
468 spin_lock_irq(¤t->sighand->siglock);
470 oldset = current->blocked;
471 current->blocked = set;
474 spin_unlock_irq(¤t->sighand->siglock);
477 * The return below usually returns to the signal handler. We need to pre-set the
478 * correct error code here to ensure that the right values get saved in sigcontext
483 current->state = TASK_INTERRUPTIBLE;
485 if (ia64_do_signal(&oldset, scr, 1))
491 ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
495 if (sigsetsize > sizeof(compat_sigset_t))
498 if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
501 return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
505 ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
507 return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
511 sys32_signal (int sig, unsigned int handler)
513 struct k_sigaction new_sa, old_sa;
516 sigact_set_handler(&new_sa, handler, 0);
517 new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
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);