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Merge tag 'v3.10.71' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm64 / kernel / signal32.c
1 /*
2 * Based on arch/arm/kernel/signal.c
3 *
4 * Copyright (C) 1995-2009 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 * Modified by Will Deacon <will.deacon@arm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <linux/compat.h>
22 #include <linux/signal.h>
23 #include <linux/syscalls.h>
24 #include <linux/ratelimit.h>
25
26 #include <asm/fpsimd.h>
27 #include <asm/signal32.h>
28 #include <asm/uaccess.h>
29 #include <asm/unistd.h>
30
31 struct compat_sigcontext {
32 /* We always set these two fields to 0 */
33 compat_ulong_t trap_no;
34 compat_ulong_t error_code;
35
36 compat_ulong_t oldmask;
37 compat_ulong_t arm_r0;
38 compat_ulong_t arm_r1;
39 compat_ulong_t arm_r2;
40 compat_ulong_t arm_r3;
41 compat_ulong_t arm_r4;
42 compat_ulong_t arm_r5;
43 compat_ulong_t arm_r6;
44 compat_ulong_t arm_r7;
45 compat_ulong_t arm_r8;
46 compat_ulong_t arm_r9;
47 compat_ulong_t arm_r10;
48 compat_ulong_t arm_fp;
49 compat_ulong_t arm_ip;
50 compat_ulong_t arm_sp;
51 compat_ulong_t arm_lr;
52 compat_ulong_t arm_pc;
53 compat_ulong_t arm_cpsr;
54 compat_ulong_t fault_address;
55 };
56
57 struct compat_ucontext {
58 compat_ulong_t uc_flags;
59 compat_uptr_t uc_link;
60 compat_stack_t uc_stack;
61 struct compat_sigcontext uc_mcontext;
62 compat_sigset_t uc_sigmask;
63 int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))];
64 compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8)));
65 };
66
67 struct compat_vfp_sigframe {
68 compat_ulong_t magic;
69 compat_ulong_t size;
70 struct compat_user_vfp {
71 compat_u64 fpregs[32];
72 compat_ulong_t fpscr;
73 } ufp;
74 struct compat_user_vfp_exc {
75 compat_ulong_t fpexc;
76 compat_ulong_t fpinst;
77 compat_ulong_t fpinst2;
78 } ufp_exc;
79 } __attribute__((__aligned__(8)));
80
81 #define VFP_MAGIC 0x56465001
82 #define VFP_STORAGE_SIZE sizeof(struct compat_vfp_sigframe)
83
84 struct compat_aux_sigframe {
85 struct compat_vfp_sigframe vfp;
86
87 /* Something that isn't a valid magic number for any coprocessor. */
88 unsigned long end_magic;
89 } __attribute__((__aligned__(8)));
90
91 struct compat_sigframe {
92 struct compat_ucontext uc;
93 compat_ulong_t retcode[2];
94 };
95
96 struct compat_rt_sigframe {
97 struct compat_siginfo info;
98 struct compat_sigframe sig;
99 };
100
101 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
102
103 /*
104 * For ARM syscalls, the syscall number has to be loaded into r7.
105 * We do not support an OABI userspace.
106 */
107 #define MOV_R7_NR_SIGRETURN (0xe3a07000 | __NR_compat_sigreturn)
108 #define SVC_SYS_SIGRETURN (0xef000000 | __NR_compat_sigreturn)
109 #define MOV_R7_NR_RT_SIGRETURN (0xe3a07000 | __NR_compat_rt_sigreturn)
110 #define SVC_SYS_RT_SIGRETURN (0xef000000 | __NR_compat_rt_sigreturn)
111
112 /*
113 * For Thumb syscalls, we also pass the syscall number via r7. We therefore
114 * need two 16-bit instructions.
115 */
116 #define SVC_THUMB_SIGRETURN (((0xdf00 | __NR_compat_sigreturn) << 16) | \
117 0x2700 | __NR_compat_sigreturn)
118 #define SVC_THUMB_RT_SIGRETURN (((0xdf00 | __NR_compat_rt_sigreturn) << 16) | \
119 0x2700 | __NR_compat_rt_sigreturn)
120
121 const compat_ulong_t aarch32_sigret_code[6] = {
122 /*
123 * AArch32 sigreturn code.
124 * We don't construct an OABI SWI - instead we just set the imm24 field
125 * to the EABI syscall number so that we create a sane disassembly.
126 */
127 MOV_R7_NR_SIGRETURN, SVC_SYS_SIGRETURN, SVC_THUMB_SIGRETURN,
128 MOV_R7_NR_RT_SIGRETURN, SVC_SYS_RT_SIGRETURN, SVC_THUMB_RT_SIGRETURN,
129 };
130
131 static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
132 {
133 compat_sigset_t cset;
134
135 cset.sig[0] = set->sig[0] & 0xffffffffull;
136 cset.sig[1] = set->sig[0] >> 32;
137
138 return copy_to_user(uset, &cset, sizeof(*uset));
139 }
140
141 static inline int get_sigset_t(sigset_t *set,
142 const compat_sigset_t __user *uset)
143 {
144 compat_sigset_t s32;
145
146 if (copy_from_user(&s32, uset, sizeof(*uset)))
147 return -EFAULT;
148
149 set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
150 return 0;
151 }
152
153 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
154 {
155 int err;
156
157 if (!access_ok(VERIFY_WRITE, to, sizeof(*to)))
158 return -EFAULT;
159
160 /* If you change siginfo_t structure, please be sure
161 * this code is fixed accordingly.
162 * It should never copy any pad contained in the structure
163 * to avoid security leaks, but must copy the generic
164 * 3 ints plus the relevant union member.
165 * This routine must convert siginfo from 64bit to 32bit as well
166 * at the same time.
167 */
168 err = __put_user(from->si_signo, &to->si_signo);
169 err |= __put_user(from->si_errno, &to->si_errno);
170 err |= __put_user((short)from->si_code, &to->si_code);
171 if (from->si_code < 0)
172 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad,
173 SI_PAD_SIZE);
174 else switch (from->si_code & __SI_MASK) {
175 case __SI_KILL:
176 err |= __put_user(from->si_pid, &to->si_pid);
177 err |= __put_user(from->si_uid, &to->si_uid);
178 break;
179 case __SI_TIMER:
180 err |= __put_user(from->si_tid, &to->si_tid);
181 err |= __put_user(from->si_overrun, &to->si_overrun);
182 err |= __put_user(from->si_int, &to->si_int);
183 break;
184 case __SI_POLL:
185 err |= __put_user(from->si_band, &to->si_band);
186 err |= __put_user(from->si_fd, &to->si_fd);
187 break;
188 case __SI_FAULT:
189 err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr,
190 &to->si_addr);
191 #ifdef BUS_MCEERR_AO
192 /*
193 * Other callers might not initialize the si_lsb field,
194 * so check explicitely for the right codes here.
195 */
196 if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)
197 err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
198 #endif
199 break;
200 case __SI_CHLD:
201 err |= __put_user(from->si_pid, &to->si_pid);
202 err |= __put_user(from->si_uid, &to->si_uid);
203 err |= __put_user(from->si_status, &to->si_status);
204 err |= __put_user(from->si_utime, &to->si_utime);
205 err |= __put_user(from->si_stime, &to->si_stime);
206 break;
207 case __SI_RT: /* This is not generated by the kernel as of now. */
208 case __SI_MESGQ: /* But this is */
209 err |= __put_user(from->si_pid, &to->si_pid);
210 err |= __put_user(from->si_uid, &to->si_uid);
211 err |= __put_user(from->si_int, &to->si_int);
212 break;
213 #ifdef __ARCH_SIGSYS
214 case __SI_SYS:
215 err |= __put_user((compat_uptr_t)(unsigned long)
216 from->si_call_addr, &to->si_call_addr);
217 err |= __put_user(from->si_syscall, &to->si_syscall);
218 err |= __put_user(from->si_arch, &to->si_arch);
219 break;
220 #endif
221 default: /* this is just in case for now ... */
222 err |= __put_user(from->si_pid, &to->si_pid);
223 err |= __put_user(from->si_uid, &to->si_uid);
224 break;
225 }
226 return err;
227 }
228
229 int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
230 {
231 memset(to, 0, sizeof *to);
232
233 if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) ||
234 copy_from_user(to->_sifields._pad,
235 from->_sifields._pad, SI_PAD_SIZE))
236 return -EFAULT;
237
238 return 0;
239 }
240
241 /*
242 * VFP save/restore code.
243 */
244 static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame)
245 {
246 struct fpsimd_state *fpsimd = &current->thread.fpsimd_state;
247 compat_ulong_t magic = VFP_MAGIC;
248 compat_ulong_t size = VFP_STORAGE_SIZE;
249 compat_ulong_t fpscr, fpexc;
250 int err = 0;
251
252 /*
253 * Save the hardware registers to the fpsimd_state structure.
254 * Note that this also saves V16-31, which aren't visible
255 * in AArch32.
256 */
257 fpsimd_preserve_current_state();
258
259 /* Place structure header on the stack */
260 __put_user_error(magic, &frame->magic, err);
261 __put_user_error(size, &frame->size, err);
262
263 /*
264 * Now copy the FP registers. Since the registers are packed,
265 * we can copy the prefix we want (V0-V15) as it is.
266 * FIXME: Won't work if big endian.
267 */
268 err |= __copy_to_user(&frame->ufp.fpregs, fpsimd->vregs,
269 sizeof(frame->ufp.fpregs));
270
271 /* Create an AArch32 fpscr from the fpsr and the fpcr. */
272 fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) |
273 (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK);
274 __put_user_error(fpscr, &frame->ufp.fpscr, err);
275
276 /*
277 * The exception register aren't available so we fake up a
278 * basic FPEXC and zero everything else.
279 */
280 fpexc = (1 << 30);
281 __put_user_error(fpexc, &frame->ufp_exc.fpexc, err);
282 __put_user_error(0, &frame->ufp_exc.fpinst, err);
283 __put_user_error(0, &frame->ufp_exc.fpinst2, err);
284
285 return err ? -EFAULT : 0;
286 }
287
288 static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
289 {
290 struct fpsimd_state fpsimd;
291 compat_ulong_t magic = VFP_MAGIC;
292 compat_ulong_t size = VFP_STORAGE_SIZE;
293 compat_ulong_t fpscr;
294 int err = 0;
295
296 __get_user_error(magic, &frame->magic, err);
297 __get_user_error(size, &frame->size, err);
298
299 if (err)
300 return -EFAULT;
301 if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
302 return -EINVAL;
303
304 /*
305 * Copy the FP registers into the start of the fpsimd_state.
306 * FIXME: Won't work if big endian.
307 */
308 err |= __copy_from_user(fpsimd.vregs, frame->ufp.fpregs,
309 sizeof(frame->ufp.fpregs));
310
311 /* Extract the fpsr and the fpcr from the fpscr */
312 __get_user_error(fpscr, &frame->ufp.fpscr, err);
313 fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK;
314 fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK;
315
316 /*
317 * We don't need to touch the exception register, so
318 * reload the hardware state.
319 */
320 if (!err)
321 fpsimd_update_current_state(&fpsimd);
322
323 return err ? -EFAULT : 0;
324 }
325
326 static int compat_restore_sigframe(struct pt_regs *regs,
327 struct compat_sigframe __user *sf)
328 {
329 int err;
330 sigset_t set;
331 struct compat_aux_sigframe __user *aux;
332
333 err = get_sigset_t(&set, &sf->uc.uc_sigmask);
334 if (err == 0) {
335 sigdelsetmask(&set, ~_BLOCKABLE);
336 set_current_blocked(&set);
337 }
338
339 __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
340 __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
341 __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
342 __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
343 __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
344 __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
345 __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
346 __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
347 __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
348 __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
349 __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
350 __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
351 __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
352 __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
353 __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
354 __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
355 __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
356
357 /*
358 * Avoid compat_sys_sigreturn() restarting.
359 */
360 regs->syscallno = ~0UL;
361
362 err |= !valid_user_regs(&regs->user_regs);
363
364 aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
365 if (err == 0)
366 err |= compat_restore_vfp_context(&aux->vfp);
367
368 return err;
369 }
370
371 asmlinkage int compat_sys_sigreturn(struct pt_regs *regs)
372 {
373 struct compat_sigframe __user *frame;
374
375 /* Always make any pending restarted system calls return -EINTR */
376 current_thread_info()->restart_block.fn = do_no_restart_syscall;
377
378 /*
379 * Since we stacked the signal on a 64-bit boundary,
380 * then 'sp' should be word aligned here. If it's
381 * not, then the user is trying to mess with us.
382 */
383 if (regs->compat_sp & 7)
384 goto badframe;
385
386 frame = (struct compat_sigframe __user *)regs->compat_sp;
387
388 if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
389 goto badframe;
390
391 if (compat_restore_sigframe(regs, frame))
392 goto badframe;
393
394 return regs->regs[0];
395
396 badframe:
397 if (show_unhandled_signals)
398 pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
399 current->comm, task_pid_nr(current), __func__,
400 regs->pc, regs->sp);
401 force_sig(SIGSEGV, current);
402 return 0;
403 }
404
405 asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs)
406 {
407 struct compat_rt_sigframe __user *frame;
408
409 /* Always make any pending restarted system calls return -EINTR */
410 current_thread_info()->restart_block.fn = do_no_restart_syscall;
411
412 /*
413 * Since we stacked the signal on a 64-bit boundary,
414 * then 'sp' should be word aligned here. If it's
415 * not, then the user is trying to mess with us.
416 */
417 if (regs->compat_sp & 7)
418 goto badframe;
419
420 frame = (struct compat_rt_sigframe __user *)regs->compat_sp;
421
422 if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
423 goto badframe;
424
425 if (compat_restore_sigframe(regs, &frame->sig))
426 goto badframe;
427
428 if (compat_restore_altstack(&frame->sig.uc.uc_stack))
429 goto badframe;
430
431 return regs->regs[0];
432
433 badframe:
434 if (show_unhandled_signals)
435 pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
436 current->comm, task_pid_nr(current), __func__,
437 regs->pc, regs->sp);
438 force_sig(SIGSEGV, current);
439 return 0;
440 }
441
442 static void __user *compat_get_sigframe(struct k_sigaction *ka,
443 struct pt_regs *regs,
444 int framesize)
445 {
446 compat_ulong_t sp = regs->compat_sp;
447 void __user *frame;
448
449 /*
450 * This is the X/Open sanctioned signal stack switching.
451 */
452 if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
453 sp = current->sas_ss_sp + current->sas_ss_size;
454
455 /*
456 * ATPCS B01 mandates 8-byte alignment
457 */
458 frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7));
459
460 /*
461 * Check that we can actually write to the signal frame.
462 */
463 if (!access_ok(VERIFY_WRITE, frame, framesize))
464 frame = NULL;
465
466 return frame;
467 }
468
469 static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka,
470 compat_ulong_t __user *rc, void __user *frame,
471 int usig)
472 {
473 compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler);
474 compat_ulong_t retcode;
475 compat_ulong_t spsr = regs->pstate & ~PSR_f;
476 int thumb;
477
478 /* Check if the handler is written for ARM or Thumb */
479 thumb = handler & 1;
480
481 if (thumb) {
482 spsr |= COMPAT_PSR_T_BIT;
483 spsr &= ~COMPAT_PSR_IT_MASK;
484 } else {
485 spsr &= ~COMPAT_PSR_T_BIT;
486 }
487
488 if (ka->sa.sa_flags & SA_RESTORER) {
489 retcode = ptr_to_compat(ka->sa.sa_restorer);
490 } else {
491 /* Set up sigreturn pointer */
492 unsigned int idx = thumb << 1;
493
494 if (ka->sa.sa_flags & SA_SIGINFO)
495 idx += 3;
496
497 retcode = AARCH32_VECTORS_BASE +
498 AARCH32_KERN_SIGRET_CODE_OFFSET +
499 (idx << 2) + thumb;
500 }
501
502 regs->regs[0] = usig;
503 regs->compat_sp = ptr_to_compat(frame);
504 regs->compat_lr = retcode;
505 regs->pc = handler;
506 regs->pstate = spsr;
507 }
508
509 static int compat_setup_sigframe(struct compat_sigframe __user *sf,
510 struct pt_regs *regs, sigset_t *set)
511 {
512 struct compat_aux_sigframe __user *aux;
513 int err = 0;
514
515 __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
516 __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
517 __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
518 __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
519 __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
520 __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
521 __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
522 __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
523 __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
524 __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
525 __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
526 __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
527 __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
528 __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
529 __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
530 __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
531 __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
532
533 __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err);
534 __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.error_code, err);
535 __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err);
536 __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
537
538 err |= put_sigset_t(&sf->uc.uc_sigmask, set);
539
540 aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
541
542 if (err == 0)
543 err |= compat_preserve_vfp_context(&aux->vfp);
544 __put_user_error(0, &aux->end_magic, err);
545
546 return err;
547 }
548
549 /*
550 * 32-bit signal handling routines called from signal.c
551 */
552 int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
553 sigset_t *set, struct pt_regs *regs)
554 {
555 struct compat_rt_sigframe __user *frame;
556 int err = 0;
557
558 frame = compat_get_sigframe(ka, regs, sizeof(*frame));
559
560 if (!frame)
561 return 1;
562
563 err |= copy_siginfo_to_user32(&frame->info, info);
564
565 __put_user_error(0, &frame->sig.uc.uc_flags, err);
566 __put_user_error(0, &frame->sig.uc.uc_link, err);
567
568 err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp);
569
570 err |= compat_setup_sigframe(&frame->sig, regs, set);
571
572 if (err == 0) {
573 compat_setup_return(regs, ka, frame->sig.retcode, frame, usig);
574 regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info;
575 regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc;
576 }
577
578 return err;
579 }
580
581 int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
582 struct pt_regs *regs)
583 {
584 struct compat_sigframe __user *frame;
585 int err = 0;
586
587 frame = compat_get_sigframe(ka, regs, sizeof(*frame));
588
589 if (!frame)
590 return 1;
591
592 __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
593
594 err |= compat_setup_sigframe(frame, regs, set);
595 if (err == 0)
596 compat_setup_return(regs, ka, frame->retcode, frame, usig);
597
598 return err;
599 }
600
601 void compat_setup_restart_syscall(struct pt_regs *regs)
602 {
603 regs->regs[7] = __NR_compat_restart_syscall;
604 }
kernel source for telekom puls (alcatel/mediatek)