]>
git.proxmox.com Git - mirror_ubuntu-kernels.git/blob - arch/ia64/kernel/signal.c
2 * Architecture-specific signal handling support.
4 * Copyright (C) 1999-2004 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
7 * Derived from i386 and Alpha versions.
10 #include <linux/config.h>
11 #include <linux/errno.h>
12 #include <linux/kernel.h>
14 #include <linux/ptrace.h>
15 #include <linux/sched.h>
16 #include <linux/signal.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/tty.h>
21 #include <linux/binfmts.h>
22 #include <linux/unistd.h>
23 #include <linux/wait.h>
26 #include <asm/intrinsics.h>
27 #include <asm/uaccess.h>
29 #include <asm/sigcontext.h>
34 #define STACK_ALIGN 16 /* minimal alignment for stack pointer */
35 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
38 # define PUT_SIGSET(k,u) __copy_to_user((u)->sig, (k)->sig, sizeof(sigset_t))
39 # define GET_SIGSET(k,u) __copy_from_user((k)->sig, (u)->sig, sizeof(sigset_t))
41 # define PUT_SIGSET(k,u) __put_user((k)->sig[0], &(u)->sig[0])
42 # define GET_SIGSET(k,u) __get_user((k)->sig[0], &(u)->sig[0])
46 ia64_rt_sigsuspend (sigset_t __user
*uset
, size_t sigsetsize
, struct sigscratch
*scr
)
50 /* XXX: Don't preclude handling different sized sigset_t's. */
51 if (sigsetsize
!= sizeof(sigset_t
))
54 if (!access_ok(VERIFY_READ
, uset
, sigsetsize
))
57 if (GET_SIGSET(&set
, uset
))
60 sigdelsetmask(&set
, ~_BLOCKABLE
);
62 spin_lock_irq(¤t
->sighand
->siglock
);
64 oldset
= current
->blocked
;
65 current
->blocked
= set
;
68 spin_unlock_irq(¤t
->sighand
->siglock
);
71 * The return below usually returns to the signal handler. We need to
72 * pre-set the correct error code here to ensure that the right values
73 * get saved in sigcontext by ia64_do_signal.
79 current
->state
= TASK_INTERRUPTIBLE
;
81 if (ia64_do_signal(&oldset
, scr
, 1))
87 sys_sigaltstack (const stack_t __user
*uss
, stack_t __user
*uoss
, long arg2
,
88 long arg3
, long arg4
, long arg5
, long arg6
, long arg7
,
91 return do_sigaltstack(uss
, uoss
, regs
.r12
);
95 restore_sigcontext (struct sigcontext __user
*sc
, struct sigscratch
*scr
)
97 unsigned long ip
, flags
, nat
, um
, cfm
, rsc
;
100 /* Always make any pending restarted system calls return -EINTR */
101 current_thread_info()->restart_block
.fn
= do_no_restart_syscall
;
103 /* restore scratch that always needs gets updated during signal delivery: */
104 err
= __get_user(flags
, &sc
->sc_flags
);
105 err
|= __get_user(nat
, &sc
->sc_nat
);
106 err
|= __get_user(ip
, &sc
->sc_ip
); /* instruction pointer */
107 err
|= __get_user(cfm
, &sc
->sc_cfm
);
108 err
|= __get_user(um
, &sc
->sc_um
); /* user mask */
109 err
|= __get_user(rsc
, &sc
->sc_ar_rsc
);
110 err
|= __get_user(scr
->pt
.ar_unat
, &sc
->sc_ar_unat
);
111 err
|= __get_user(scr
->pt
.ar_fpsr
, &sc
->sc_ar_fpsr
);
112 err
|= __get_user(scr
->pt
.ar_pfs
, &sc
->sc_ar_pfs
);
113 err
|= __get_user(scr
->pt
.pr
, &sc
->sc_pr
); /* predicates */
114 err
|= __get_user(scr
->pt
.b0
, &sc
->sc_br
[0]); /* b0 (rp) */
115 err
|= __get_user(scr
->pt
.b6
, &sc
->sc_br
[6]); /* b6 */
116 err
|= __copy_from_user(&scr
->pt
.r1
, &sc
->sc_gr
[1], 8); /* r1 */
117 err
|= __copy_from_user(&scr
->pt
.r8
, &sc
->sc_gr
[8], 4*8); /* r8-r11 */
118 err
|= __copy_from_user(&scr
->pt
.r12
, &sc
->sc_gr
[12], 2*8); /* r12-r13 */
119 err
|= __copy_from_user(&scr
->pt
.r15
, &sc
->sc_gr
[15], 8); /* r15 */
121 scr
->pt
.cr_ifs
= cfm
| (1UL << 63);
122 scr
->pt
.ar_rsc
= rsc
| (3 << 2); /* force PL3 */
124 /* establish new instruction pointer: */
125 scr
->pt
.cr_iip
= ip
& ~0x3UL
;
126 ia64_psr(&scr
->pt
)->ri
= ip
& 0x3;
127 scr
->pt
.cr_ipsr
= (scr
->pt
.cr_ipsr
& ~IA64_PSR_UM
) | (um
& IA64_PSR_UM
);
129 scr
->scratch_unat
= ia64_put_scratch_nat_bits(&scr
->pt
, nat
);
131 if (!(flags
& IA64_SC_FLAG_IN_SYSCALL
)) {
132 /* Restore most scratch-state only when not in syscall. */
133 err
|= __get_user(scr
->pt
.ar_ccv
, &sc
->sc_ar_ccv
); /* ar.ccv */
134 err
|= __get_user(scr
->pt
.b7
, &sc
->sc_br
[7]); /* b7 */
135 err
|= __get_user(scr
->pt
.r14
, &sc
->sc_gr
[14]); /* r14 */
136 err
|= __copy_from_user(&scr
->pt
.ar_csd
, &sc
->sc_ar25
, 2*8); /* ar.csd & ar.ssd */
137 err
|= __copy_from_user(&scr
->pt
.r2
, &sc
->sc_gr
[2], 2*8); /* r2-r3 */
138 err
|= __copy_from_user(&scr
->pt
.r16
, &sc
->sc_gr
[16], 16*8); /* r16-r31 */
141 if ((flags
& IA64_SC_FLAG_FPH_VALID
) != 0) {
142 struct ia64_psr
*psr
= ia64_psr(&scr
->pt
);
144 __copy_from_user(current
->thread
.fph
, &sc
->sc_fr
[32], 96*16);
145 psr
->mfh
= 0; /* drop signal handler's fph contents... */
148 ia64_drop_fpu(current
);
150 /* We already own the local fph, otherwise psr->dfh wouldn't be 0. */
151 __ia64_load_fpu(current
->thread
.fph
);
152 ia64_set_local_fpu_owner(current
);
160 copy_siginfo_to_user (siginfo_t __user
*to
, siginfo_t
*from
)
162 if (!access_ok(VERIFY_WRITE
, to
, sizeof(siginfo_t
)))
164 if (from
->si_code
< 0) {
165 if (__copy_to_user(to
, from
, sizeof(siginfo_t
)))
172 * If you change siginfo_t structure, please be sure this code is fixed
173 * accordingly. It should never copy any pad contained in the structure
174 * to avoid security leaks, but must copy the generic 3 ints plus the
175 * relevant union member.
177 err
= __put_user(from
->si_signo
, &to
->si_signo
);
178 err
|= __put_user(from
->si_errno
, &to
->si_errno
);
179 err
|= __put_user((short)from
->si_code
, &to
->si_code
);
180 switch (from
->si_code
>> 16) {
181 case __SI_FAULT
>> 16:
182 err
|= __put_user(from
->si_flags
, &to
->si_flags
);
183 err
|= __put_user(from
->si_isr
, &to
->si_isr
);
184 case __SI_POLL
>> 16:
185 err
|= __put_user(from
->si_addr
, &to
->si_addr
);
186 err
|= __put_user(from
->si_imm
, &to
->si_imm
);
188 case __SI_TIMER
>> 16:
189 err
|= __put_user(from
->si_tid
, &to
->si_tid
);
190 err
|= __put_user(from
->si_overrun
, &to
->si_overrun
);
191 err
|= __put_user(from
->si_ptr
, &to
->si_ptr
);
193 case __SI_RT
>> 16: /* Not generated by the kernel as of now. */
194 case __SI_MESGQ
>> 16:
195 err
|= __put_user(from
->si_uid
, &to
->si_uid
);
196 err
|= __put_user(from
->si_pid
, &to
->si_pid
);
197 err
|= __put_user(from
->si_ptr
, &to
->si_ptr
);
199 case __SI_CHLD
>> 16:
200 err
|= __put_user(from
->si_utime
, &to
->si_utime
);
201 err
|= __put_user(from
->si_stime
, &to
->si_stime
);
202 err
|= __put_user(from
->si_status
, &to
->si_status
);
204 err
|= __put_user(from
->si_uid
, &to
->si_uid
);
205 err
|= __put_user(from
->si_pid
, &to
->si_pid
);
213 ia64_rt_sigreturn (struct sigscratch
*scr
)
215 extern char ia64_strace_leave_kernel
, ia64_leave_kernel
;
216 struct sigcontext __user
*sc
;
221 sc
= &((struct sigframe __user
*) (scr
->pt
.r12
+ 16))->sc
;
224 * When we return to the previously executing context, r8 and r10 have already
225 * been setup the way we want them. Indeed, if the signal wasn't delivered while
226 * in a system call, we must not touch r8 or r10 as otherwise user-level state
227 * could be corrupted.
229 retval
= (long) &ia64_leave_kernel
;
230 if (test_thread_flag(TIF_SYSCALL_TRACE
)
231 || test_thread_flag(TIF_SYSCALL_AUDIT
))
233 * strace expects to be notified after sigreturn returns even though the
234 * context to which we return may not be in the middle of a syscall.
235 * Thus, the return-value that strace displays for sigreturn is
238 retval
= (long) &ia64_strace_leave_kernel
;
240 if (!access_ok(VERIFY_READ
, sc
, sizeof(*sc
)))
243 if (GET_SIGSET(&set
, &sc
->sc_mask
))
246 sigdelsetmask(&set
, ~_BLOCKABLE
);
248 spin_lock_irq(¤t
->sighand
->siglock
);
250 current
->blocked
= set
;
253 spin_unlock_irq(¤t
->sighand
->siglock
);
255 if (restore_sigcontext(sc
, scr
))
259 printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
260 current
->comm
, current
->pid
, scr
->pt
.r12
, scr
->pt
.cr_iip
);
263 * It is more difficult to avoid calling this function than to
264 * call it and ignore errors.
266 do_sigaltstack(&sc
->sc_stack
, NULL
, scr
->pt
.r12
);
270 si
.si_signo
= SIGSEGV
;
272 si
.si_code
= SI_KERNEL
;
273 si
.si_pid
= current
->pid
;
274 si
.si_uid
= current
->uid
;
276 force_sig_info(SIGSEGV
, &si
, current
);
281 * This does just the minimum required setup of sigcontext.
282 * Specifically, it only installs data that is either not knowable at
283 * the user-level or that gets modified before execution in the
284 * trampoline starts. Everything else is done at the user-level.
287 setup_sigcontext (struct sigcontext __user
*sc
, sigset_t
*mask
, struct sigscratch
*scr
)
289 unsigned long flags
= 0, ifs
, cfm
, nat
;
292 ifs
= scr
->pt
.cr_ifs
;
294 if (on_sig_stack((unsigned long) sc
))
295 flags
|= IA64_SC_FLAG_ONSTACK
;
296 if ((ifs
& (1UL << 63)) == 0)
297 /* if cr_ifs doesn't have the valid bit set, we got here through a syscall */
298 flags
|= IA64_SC_FLAG_IN_SYSCALL
;
299 cfm
= ifs
& ((1UL << 38) - 1);
300 ia64_flush_fph(current
);
301 if ((current
->thread
.flags
& IA64_THREAD_FPH_VALID
)) {
302 flags
|= IA64_SC_FLAG_FPH_VALID
;
303 __copy_to_user(&sc
->sc_fr
[32], current
->thread
.fph
, 96*16);
306 nat
= ia64_get_scratch_nat_bits(&scr
->pt
, scr
->scratch_unat
);
308 err
= __put_user(flags
, &sc
->sc_flags
);
309 err
|= __put_user(nat
, &sc
->sc_nat
);
310 err
|= PUT_SIGSET(mask
, &sc
->sc_mask
);
311 err
|= __put_user(cfm
, &sc
->sc_cfm
);
312 err
|= __put_user(scr
->pt
.cr_ipsr
& IA64_PSR_UM
, &sc
->sc_um
);
313 err
|= __put_user(scr
->pt
.ar_rsc
, &sc
->sc_ar_rsc
);
314 err
|= __put_user(scr
->pt
.ar_unat
, &sc
->sc_ar_unat
); /* ar.unat */
315 err
|= __put_user(scr
->pt
.ar_fpsr
, &sc
->sc_ar_fpsr
); /* ar.fpsr */
316 err
|= __put_user(scr
->pt
.ar_pfs
, &sc
->sc_ar_pfs
);
317 err
|= __put_user(scr
->pt
.pr
, &sc
->sc_pr
); /* predicates */
318 err
|= __put_user(scr
->pt
.b0
, &sc
->sc_br
[0]); /* b0 (rp) */
319 err
|= __put_user(scr
->pt
.b6
, &sc
->sc_br
[6]); /* b6 */
320 err
|= __copy_to_user(&sc
->sc_gr
[1], &scr
->pt
.r1
, 8); /* r1 */
321 err
|= __copy_to_user(&sc
->sc_gr
[8], &scr
->pt
.r8
, 4*8); /* r8-r11 */
322 err
|= __copy_to_user(&sc
->sc_gr
[12], &scr
->pt
.r12
, 2*8); /* r12-r13 */
323 err
|= __copy_to_user(&sc
->sc_gr
[15], &scr
->pt
.r15
, 8); /* r15 */
324 err
|= __put_user(scr
->pt
.cr_iip
+ ia64_psr(&scr
->pt
)->ri
, &sc
->sc_ip
);
326 if (flags
& IA64_SC_FLAG_IN_SYSCALL
) {
327 /* Clear scratch registers if the signal interrupted a system call. */
328 err
|= __put_user(0, &sc
->sc_ar_ccv
); /* ar.ccv */
329 err
|= __put_user(0, &sc
->sc_br
[7]); /* b7 */
330 err
|= __put_user(0, &sc
->sc_gr
[14]); /* r14 */
331 err
|= __clear_user(&sc
->sc_ar25
, 2*8); /* ar.csd & ar.ssd */
332 err
|= __clear_user(&sc
->sc_gr
[2], 2*8); /* r2-r3 */
333 err
|= __clear_user(&sc
->sc_gr
[16], 16*8); /* r16-r31 */
335 /* Copy scratch regs to sigcontext if the signal didn't interrupt a syscall. */
336 err
|= __put_user(scr
->pt
.ar_ccv
, &sc
->sc_ar_ccv
); /* ar.ccv */
337 err
|= __put_user(scr
->pt
.b7
, &sc
->sc_br
[7]); /* b7 */
338 err
|= __put_user(scr
->pt
.r14
, &sc
->sc_gr
[14]); /* r14 */
339 err
|= __copy_to_user(&sc
->sc_ar25
, &scr
->pt
.ar_csd
, 2*8); /* ar.csd & ar.ssd */
340 err
|= __copy_to_user(&sc
->sc_gr
[2], &scr
->pt
.r2
, 2*8); /* r2-r3 */
341 err
|= __copy_to_user(&sc
->sc_gr
[16], &scr
->pt
.r16
, 16*8); /* r16-r31 */
347 * Check whether the register-backing store is already on the signal stack.
350 rbs_on_sig_stack (unsigned long bsp
)
352 return (bsp
- current
->sas_ss_sp
< current
->sas_ss_size
);
356 force_sigsegv_info (int sig
, void __user
*addr
)
361 if (sig
== SIGSEGV
) {
363 * Acquiring siglock around the sa_handler-update is almost
364 * certainly overkill, but this isn't a
365 * performance-critical path and I'd rather play it safe
366 * here than having to debug a nasty race if and when
367 * something changes in kernel/signal.c that would make it
368 * no longer safe to modify sa_handler without holding the
371 spin_lock_irqsave(¤t
->sighand
->siglock
, flags
);
372 current
->sighand
->action
[sig
- 1].sa
.sa_handler
= SIG_DFL
;
373 spin_unlock_irqrestore(¤t
->sighand
->siglock
, flags
);
375 si
.si_signo
= SIGSEGV
;
377 si
.si_code
= SI_KERNEL
;
378 si
.si_pid
= current
->pid
;
379 si
.si_uid
= current
->uid
;
381 force_sig_info(SIGSEGV
, &si
, current
);
386 setup_frame (int sig
, struct k_sigaction
*ka
, siginfo_t
*info
, sigset_t
*set
,
387 struct sigscratch
*scr
)
389 extern char __kernel_sigtramp
[];
390 unsigned long tramp_addr
, new_rbs
= 0, new_sp
;
391 struct sigframe __user
*frame
;
394 new_sp
= scr
->pt
.r12
;
395 tramp_addr
= (unsigned long) __kernel_sigtramp
;
396 if ((ka
->sa
.sa_flags
& SA_ONSTACK
) && sas_ss_flags(new_sp
) == 0) {
397 new_sp
= current
->sas_ss_sp
+ current
->sas_ss_size
;
399 * We need to check for the register stack being on the signal stack
400 * separately, because it's switched separately (memory stack is switched
401 * in the kernel, register stack is switched in the signal trampoline).
403 if (!rbs_on_sig_stack(scr
->pt
.ar_bspstore
))
404 new_rbs
= (current
->sas_ss_sp
+ sizeof(long) - 1) & ~(sizeof(long) - 1);
406 frame
= (void __user
*) ((new_sp
- sizeof(*frame
)) & -STACK_ALIGN
);
408 if (!access_ok(VERIFY_WRITE
, frame
, sizeof(*frame
)))
409 return force_sigsegv_info(sig
, frame
);
411 err
= __put_user(sig
, &frame
->arg0
);
412 err
|= __put_user(&frame
->info
, &frame
->arg1
);
413 err
|= __put_user(&frame
->sc
, &frame
->arg2
);
414 err
|= __put_user(new_rbs
, &frame
->sc
.sc_rbs_base
);
415 err
|= __put_user(0, &frame
->sc
.sc_loadrs
); /* initialize to zero */
416 err
|= __put_user(ka
->sa
.sa_handler
, &frame
->handler
);
418 err
|= copy_siginfo_to_user(&frame
->info
, info
);
420 err
|= __put_user(current
->sas_ss_sp
, &frame
->sc
.sc_stack
.ss_sp
);
421 err
|= __put_user(current
->sas_ss_size
, &frame
->sc
.sc_stack
.ss_size
);
422 err
|= __put_user(sas_ss_flags(scr
->pt
.r12
), &frame
->sc
.sc_stack
.ss_flags
);
423 err
|= setup_sigcontext(&frame
->sc
, set
, scr
);
426 return force_sigsegv_info(sig
, frame
);
428 scr
->pt
.r12
= (unsigned long) frame
- 16; /* new stack pointer */
429 scr
->pt
.ar_fpsr
= FPSR_DEFAULT
; /* reset fpsr for signal handler */
430 scr
->pt
.cr_iip
= tramp_addr
;
431 ia64_psr(&scr
->pt
)->ri
= 0; /* start executing in first slot */
432 ia64_psr(&scr
->pt
)->be
= 0; /* force little-endian byte-order */
434 * Force the interruption function mask to zero. This has no effect when a
435 * system-call got interrupted by a signal (since, in that case, scr->pt_cr_ifs is
436 * ignored), but it has the desirable effect of making it possible to deliver a
437 * signal with an incomplete register frame (which happens when a mandatory RSE
438 * load faults). Furthermore, it has no negative effect on the getting the user's
439 * dirty partition preserved, because that's governed by scr->pt.loadrs.
441 scr
->pt
.cr_ifs
= (1UL << 63);
444 * Note: this affects only the NaT bits of the scratch regs (the ones saved in
445 * pt_regs), which is exactly what we want.
447 scr
->scratch_unat
= 0; /* ensure NaT bits of r12 is clear */
450 printk("SIG deliver (%s:%d): sig=%d sp=%lx ip=%lx handler=%p\n",
451 current
->comm
, current
->pid
, sig
, scr
->pt
.r12
, frame
->sc
.sc_ip
, frame
->handler
);
457 handle_signal (unsigned long sig
, struct k_sigaction
*ka
, siginfo_t
*info
, sigset_t
*oldset
,
458 struct sigscratch
*scr
)
460 if (IS_IA32_PROCESS(&scr
->pt
)) {
461 /* send signal to IA-32 process */
462 if (!ia32_setup_frame1(sig
, ka
, info
, oldset
, &scr
->pt
))
465 /* send signal to IA-64 process */
466 if (!setup_frame(sig
, ka
, info
, oldset
, scr
))
469 spin_lock_irq(¤t
->sighand
->siglock
);
470 sigorsets(¤t
->blocked
, ¤t
->blocked
, &ka
->sa
.sa_mask
);
471 if (!(ka
->sa
.sa_flags
& SA_NODEFER
))
472 sigaddset(¤t
->blocked
, sig
);
474 spin_unlock_irq(¤t
->sighand
->siglock
);
479 * Note that `init' is a special process: it doesn't get signals it doesn't want to
480 * handle. Thus you cannot kill init even with a SIGKILL even by mistake.
483 ia64_do_signal (sigset_t
*oldset
, struct sigscratch
*scr
, long in_syscall
)
485 struct k_sigaction ka
;
487 long restart
= in_syscall
;
488 long errno
= scr
->pt
.r8
;
489 # define ERR_CODE(c) (IS_IA32_PROCESS(&scr->pt) ? -(c) : (c))
492 * In the ia64_leave_kernel code path, we want the common case to go fast, which
493 * is why we may in certain cases get here from kernel mode. Just return without
494 * doing anything if so.
496 if (!user_mode(&scr
->pt
))
500 oldset
= ¤t
->blocked
;
503 * This only loops in the rare cases of handle_signal() failing, in which case we
504 * need to push through a forced SIGSEGV.
507 int signr
= get_signal_to_deliver(&info
, &ka
, &scr
->pt
, NULL
);
510 * get_signal_to_deliver() may have run a debugger (via notify_parent())
511 * and the debugger may have modified the state (e.g., to arrange for an
512 * inferior call), thus it's important to check for restarting _after_
513 * get_signal_to_deliver().
515 if (IS_IA32_PROCESS(&scr
->pt
)) {
522 } else if ((long) scr
->pt
.r10
!= -1)
524 * A system calls has to be restarted only if one of the error codes
525 * ERESTARTNOHAND, ERESTARTSYS, or ERESTARTNOINTR is returned. If r10
526 * isn't -1 then r8 doesn't hold an error code and we don't need to
527 * restart the syscall, so we can clear the "restart" flag here.
534 if (unlikely(restart
)) {
536 case ERESTART_RESTARTBLOCK
:
538 scr
->pt
.r8
= ERR_CODE(EINTR
);
539 /* note: scr->pt.r10 is already -1 */
543 if ((ka
.sa
.sa_flags
& SA_RESTART
) == 0) {
544 scr
->pt
.r8
= ERR_CODE(EINTR
);
545 /* note: scr->pt.r10 is already -1 */
549 if (IS_IA32_PROCESS(&scr
->pt
)) {
550 scr
->pt
.r8
= scr
->pt
.r1
;
553 ia64_decrement_ip(&scr
->pt
);
554 restart
= 0; /* don't restart twice if handle_signal() fails... */
559 * Whee! Actually deliver the signal. If the delivery failed, we need to
560 * continue to iterate in this loop so we can deliver the SIGSEGV...
562 if (handle_signal(signr
, &ka
, &info
, oldset
, scr
))
566 /* Did we come from a system call? */
568 /* Restart the system call - no handlers present */
569 if (errno
== ERESTARTNOHAND
|| errno
== ERESTARTSYS
|| errno
== ERESTARTNOINTR
570 || errno
== ERESTART_RESTARTBLOCK
)
572 if (IS_IA32_PROCESS(&scr
->pt
)) {
573 scr
->pt
.r8
= scr
->pt
.r1
;
575 if (errno
== ERESTART_RESTARTBLOCK
)
576 scr
->pt
.r8
= 0; /* x86 version of __NR_restart_syscall */
579 * Note: the syscall number is in r15 which is saved in
580 * pt_regs so all we need to do here is adjust ip so that
581 * the "break" instruction gets re-executed.
583 ia64_decrement_ip(&scr
->pt
);
584 if (errno
== ERESTART_RESTARTBLOCK
)
585 scr
->pt
.r15
= __NR_restart_syscall
;