1 /* 2 * arch/s390/kernel/compat_signal.c 3 * 4 * Copyright (C) IBM Corp. 2000,2006 5 * Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) 6 * Gerhard Tonn (ton@de.ibm.com) 7 * 8 * Copyright (C) 1991, 1992 Linus Torvalds 9 * 10 * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson 11 */ 12 13 #include <linux/compat.h> 14 #include <linux/sched.h> 15 #include <linux/mm.h> 16 #include <linux/smp.h> 17 #include <linux/kernel.h> 18 #include <linux/signal.h> 19 #include <linux/errno.h> 20 #include <linux/wait.h> 21 #include <linux/ptrace.h> 22 #include <linux/unistd.h> 23 #include <linux/stddef.h> 24 #include <linux/tty.h> 25 #include <linux/personality.h> 26 #include <linux/binfmts.h> 27 #include <asm/ucontext.h> 28 #include <asm/uaccess.h> 29 #include <asm/lowcore.h> 30 #include "compat_linux.h" 31 #include "compat_ptrace.h" 32 #include "entry.h" 33 34 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) 35 36 typedef struct 37 { 38 __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 39 struct sigcontext32 sc; 40 _sigregs32 sregs; 41 int signo; 42 __u32 gprs_high[NUM_GPRS]; 43 __u8 retcode[S390_SYSCALL_SIZE]; 44 } sigframe32; 45 46 typedef struct 47 { 48 __u8 callee_used_stack[__SIGNAL_FRAMESIZE32]; 49 __u8 retcode[S390_SYSCALL_SIZE]; 50 compat_siginfo_t info; 51 struct ucontext32 uc; 52 __u32 gprs_high[NUM_GPRS]; 53 } rt_sigframe32; 54 55 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) 56 { 57 int err; 58 59 if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t))) 60 return -EFAULT; 61 62 /* If you change siginfo_t structure, please be sure 63 this code is fixed accordingly. 64 It should never copy any pad contained in the structure 65 to avoid security leaks, but must copy the generic 66 3 ints plus the relevant union member. 67 This routine must convert siginfo from 64bit to 32bit as well 68 at the same time. */ 69 err = __put_user(from->si_signo, &to->si_signo); 70 err |= __put_user(from->si_errno, &to->si_errno); 71 err |= __put_user((short)from->si_code, &to->si_code); 72 if (from->si_code < 0) 73 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 74 else { 75 switch (from->si_code >> 16) { 76 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 77 case __SI_MESGQ >> 16: 78 err |= __put_user(from->si_int, &to->si_int); 79 /* fallthrough */ 80 case __SI_KILL >> 16: 81 err |= __put_user(from->si_pid, &to->si_pid); 82 err |= __put_user(from->si_uid, &to->si_uid); 83 break; 84 case __SI_CHLD >> 16: 85 err |= __put_user(from->si_pid, &to->si_pid); 86 err |= __put_user(from->si_uid, &to->si_uid); 87 err |= __put_user(from->si_utime, &to->si_utime); 88 err |= __put_user(from->si_stime, &to->si_stime); 89 err |= __put_user(from->si_status, &to->si_status); 90 break; 91 case __SI_FAULT >> 16: 92 err |= __put_user((unsigned long) from->si_addr, 93 &to->si_addr); 94 break; 95 case __SI_POLL >> 16: 96 err |= __put_user(from->si_band, &to->si_band); 97 err |= __put_user(from->si_fd, &to->si_fd); 98 break; 99 case __SI_TIMER >> 16: 100 err |= __put_user(from->si_tid, &to->si_tid); 101 err |= __put_user(from->si_overrun, &to->si_overrun); 102 err |= __put_user(from->si_int, &to->si_int); 103 break; 104 default: 105 break; 106 } 107 } 108 return err; 109 } 110 111 int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) 112 { 113 int err; 114 u32 tmp; 115 116 if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t))) 117 return -EFAULT; 118 119 err = __get_user(to->si_signo, &from->si_signo); 120 err |= __get_user(to->si_errno, &from->si_errno); 121 err |= __get_user(to->si_code, &from->si_code); 122 123 if (to->si_code < 0) 124 err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); 125 else { 126 switch (to->si_code >> 16) { 127 case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ 128 case __SI_MESGQ >> 16: 129 err |= __get_user(to->si_int, &from->si_int); 130 /* fallthrough */ 131 case __SI_KILL >> 16: 132 err |= __get_user(to->si_pid, &from->si_pid); 133 err |= __get_user(to->si_uid, &from->si_uid); 134 break; 135 case __SI_CHLD >> 16: 136 err |= __get_user(to->si_pid, &from->si_pid); 137 err |= __get_user(to->si_uid, &from->si_uid); 138 err |= __get_user(to->si_utime, &from->si_utime); 139 err |= __get_user(to->si_stime, &from->si_stime); 140 err |= __get_user(to->si_status, &from->si_status); 141 break; 142 case __SI_FAULT >> 16: 143 err |= __get_user(tmp, &from->si_addr); 144 to->si_addr = (void __user *)(u64) (tmp & PSW32_ADDR_INSN); 145 break; 146 case __SI_POLL >> 16: 147 err |= __get_user(to->si_band, &from->si_band); 148 err |= __get_user(to->si_fd, &from->si_fd); 149 break; 150 case __SI_TIMER >> 16: 151 err |= __get_user(to->si_tid, &from->si_tid); 152 err |= __get_user(to->si_overrun, &from->si_overrun); 153 err |= __get_user(to->si_int, &from->si_int); 154 break; 155 default: 156 break; 157 } 158 } 159 return err; 160 } 161 162 asmlinkage long 163 sys32_sigaction(int sig, const struct old_sigaction32 __user *act, 164 struct old_sigaction32 __user *oact) 165 { 166 struct k_sigaction new_ka, old_ka; 167 unsigned long sa_handler, sa_restorer; 168 int ret; 169 170 if (act) { 171 compat_old_sigset_t mask; 172 if (!access_ok(VERIFY_READ, act, sizeof(*act)) || 173 __get_user(sa_handler, &act->sa_handler) || 174 __get_user(sa_restorer, &act->sa_restorer) || 175 __get_user(new_ka.sa.sa_flags, &act->sa_flags) || 176 __get_user(mask, &act->sa_mask)) 177 return -EFAULT; 178 new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 179 new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer; 180 siginitset(&new_ka.sa.sa_mask, mask); 181 } 182 183 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 184 185 if (!ret && oact) { 186 sa_handler = (unsigned long) old_ka.sa.sa_handler; 187 sa_restorer = (unsigned long) old_ka.sa.sa_restorer; 188 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || 189 __put_user(sa_handler, &oact->sa_handler) || 190 __put_user(sa_restorer, &oact->sa_restorer) || 191 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || 192 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) 193 return -EFAULT; 194 } 195 196 return ret; 197 } 198 199 asmlinkage long 200 sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, 201 struct sigaction32 __user *oact, size_t sigsetsize) 202 { 203 struct k_sigaction new_ka, old_ka; 204 unsigned long sa_handler; 205 int ret; 206 compat_sigset_t set32; 207 208 /* XXX: Don't preclude handling different sized sigset_t's. */ 209 if (sigsetsize != sizeof(compat_sigset_t)) 210 return -EINVAL; 211 212 if (act) { 213 ret = get_user(sa_handler, &act->sa_handler); 214 ret |= __copy_from_user(&set32, &act->sa_mask, 215 sizeof(compat_sigset_t)); 216 switch (_NSIG_WORDS) { 217 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] 218 | (((long)set32.sig[7]) << 32); 219 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] 220 | (((long)set32.sig[5]) << 32); 221 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] 222 | (((long)set32.sig[3]) << 32); 223 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] 224 | (((long)set32.sig[1]) << 32); 225 } 226 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 227 228 if (ret) 229 return -EFAULT; 230 new_ka.sa.sa_handler = (__sighandler_t) sa_handler; 231 } 232 233 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 234 235 if (!ret && oact) { 236 switch (_NSIG_WORDS) { 237 case 4: 238 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); 239 set32.sig[6] = old_ka.sa.sa_mask.sig[3]; 240 case 3: 241 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); 242 set32.sig[4] = old_ka.sa.sa_mask.sig[2]; 243 case 2: 244 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); 245 set32.sig[2] = old_ka.sa.sa_mask.sig[1]; 246 case 1: 247 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); 248 set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 249 } 250 ret = put_user((unsigned long)old_ka.sa.sa_handler, &oact->sa_handler); 251 ret |= __copy_to_user(&oact->sa_mask, &set32, 252 sizeof(compat_sigset_t)); 253 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 254 } 255 256 return ret; 257 } 258 259 asmlinkage long 260 sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss) 261 { 262 struct pt_regs *regs = task_pt_regs(current); 263 stack_t kss, koss; 264 unsigned long ss_sp; 265 int ret, err = 0; 266 mm_segment_t old_fs = get_fs(); 267 268 if (uss) { 269 if (!access_ok(VERIFY_READ, uss, sizeof(*uss))) 270 return -EFAULT; 271 err |= __get_user(ss_sp, &uss->ss_sp); 272 err |= __get_user(kss.ss_size, &uss->ss_size); 273 err |= __get_user(kss.ss_flags, &uss->ss_flags); 274 if (err) 275 return -EFAULT; 276 kss.ss_sp = (void __user *) ss_sp; 277 } 278 279 set_fs (KERNEL_DS); 280 ret = do_sigaltstack((stack_t __force __user *) (uss ? &kss : NULL), 281 (stack_t __force __user *) (uoss ? &koss : NULL), 282 regs->gprs[15]); 283 set_fs (old_fs); 284 285 if (!ret && uoss) { 286 if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))) 287 return -EFAULT; 288 ss_sp = (unsigned long) koss.ss_sp; 289 err |= __put_user(ss_sp, &uoss->ss_sp); 290 err |= __put_user(koss.ss_size, &uoss->ss_size); 291 err |= __put_user(koss.ss_flags, &uoss->ss_flags); 292 if (err) 293 return -EFAULT; 294 } 295 return ret; 296 } 297 298 static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) 299 { 300 _s390_regs_common32 regs32; 301 int err, i; 302 303 regs32.psw.mask = PSW32_MASK_MERGE(psw32_user_bits, 304 (__u32)(regs->psw.mask >> 32)); 305 regs32.psw.addr = PSW32_ADDR_AMODE31 | (__u32) regs->psw.addr; 306 for (i = 0; i < NUM_GPRS; i++) 307 regs32.gprs[i] = (__u32) regs->gprs[i]; 308 save_access_regs(current->thread.acrs); 309 memcpy(regs32.acrs, current->thread.acrs, sizeof(regs32.acrs)); 310 err = __copy_to_user(&sregs->regs, ®s32, sizeof(regs32)); 311 if (err) 312 return err; 313 save_fp_regs(¤t->thread.fp_regs); 314 /* s390_fp_regs and _s390_fp_regs32 are the same ! */ 315 return __copy_to_user(&sregs->fpregs, ¤t->thread.fp_regs, 316 sizeof(_s390_fp_regs32)); 317 } 318 319 static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) 320 { 321 _s390_regs_common32 regs32; 322 int err, i; 323 324 /* Alwys make any pending restarted system call return -EINTR */ 325 current_thread_info()->restart_block.fn = do_no_restart_syscall; 326 327 err = __copy_from_user(®s32, &sregs->regs, sizeof(regs32)); 328 if (err) 329 return err; 330 regs->psw.mask = PSW_MASK_MERGE(regs->psw.mask, 331 (__u64)regs32.psw.mask << 32); 332 regs->psw.addr = (__u64)(regs32.psw.addr & PSW32_ADDR_INSN); 333 for (i = 0; i < NUM_GPRS; i++) 334 regs->gprs[i] = (__u64) regs32.gprs[i]; 335 memcpy(current->thread.acrs, regs32.acrs, sizeof(current->thread.acrs)); 336 restore_access_regs(current->thread.acrs); 337 338 err = __copy_from_user(¤t->thread.fp_regs, &sregs->fpregs, 339 sizeof(_s390_fp_regs32)); 340 current->thread.fp_regs.fpc &= FPC_VALID_MASK; 341 if (err) 342 return err; 343 344 restore_fp_regs(¤t->thread.fp_regs); 345 regs->svcnr = 0; /* disable syscall checks */ 346 return 0; 347 } 348 349 static int save_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 350 { 351 __u32 gprs_high[NUM_GPRS]; 352 int i; 353 354 for (i = 0; i < NUM_GPRS; i++) 355 gprs_high[i] = regs->gprs[i] >> 32; 356 357 return __copy_to_user(uregs, &gprs_high, sizeof(gprs_high)); 358 } 359 360 static int restore_sigregs_gprs_high(struct pt_regs *regs, __u32 __user *uregs) 361 { 362 __u32 gprs_high[NUM_GPRS]; 363 int err, i; 364 365 err = __copy_from_user(&gprs_high, uregs, sizeof(gprs_high)); 366 if (err) 367 return err; 368 for (i = 0; i < NUM_GPRS; i++) 369 *(__u32 *)®s->gprs[i] = gprs_high[i]; 370 return 0; 371 } 372 373 asmlinkage long sys32_sigreturn(void) 374 { 375 struct pt_regs *regs = task_pt_regs(current); 376 sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15]; 377 sigset_t set; 378 379 if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 380 goto badframe; 381 if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) 382 goto badframe; 383 sigdelsetmask(&set, ~_BLOCKABLE); 384 set_current_blocked(&set); 385 if (restore_sigregs32(regs, &frame->sregs)) 386 goto badframe; 387 if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 388 goto badframe; 389 return regs->gprs[2]; 390 badframe: 391 force_sig(SIGSEGV, current); 392 return 0; 393 } 394 395 asmlinkage long sys32_rt_sigreturn(void) 396 { 397 struct pt_regs *regs = task_pt_regs(current); 398 rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15]; 399 sigset_t set; 400 stack_t st; 401 __u32 ss_sp; 402 int err; 403 mm_segment_t old_fs = get_fs(); 404 405 if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) 406 goto badframe; 407 if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) 408 goto badframe; 409 sigdelsetmask(&set, ~_BLOCKABLE); 410 set_current_blocked(&set); 411 if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) 412 goto badframe; 413 if (restore_sigregs_gprs_high(regs, frame->gprs_high)) 414 goto badframe; 415 err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp); 416 st.ss_sp = compat_ptr(ss_sp); 417 err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size); 418 err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags); 419 if (err) 420 goto badframe; 421 set_fs (KERNEL_DS); 422 do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]); 423 set_fs (old_fs); 424 return regs->gprs[2]; 425 badframe: 426 force_sig(SIGSEGV, current); 427 return 0; 428 } 429 430 /* 431 * Set up a signal frame. 432 */ 433 434 435 /* 436 * Determine which stack to use.. 437 */ 438 static inline void __user * 439 get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size) 440 { 441 unsigned long sp; 442 443 /* Default to using normal stack */ 444 sp = (unsigned long) A(regs->gprs[15]); 445 446 /* Overflow on alternate signal stack gives SIGSEGV. */ 447 if (on_sig_stack(sp) && !on_sig_stack((sp - frame_size) & -8UL)) 448 return (void __user *) -1UL; 449 450 /* This is the X/Open sanctioned signal stack switching. */ 451 if (ka->sa.sa_flags & SA_ONSTACK) { 452 if (! sas_ss_flags(sp)) 453 sp = current->sas_ss_sp + current->sas_ss_size; 454 } 455 456 /* This is the legacy signal stack switching. */ 457 else if (!user_mode(regs) && 458 !(ka->sa.sa_flags & SA_RESTORER) && 459 ka->sa.sa_restorer) { 460 sp = (unsigned long) ka->sa.sa_restorer; 461 } 462 463 return (void __user *)((sp - frame_size) & -8ul); 464 } 465 466 static inline int map_signal(int sig) 467 { 468 if (current_thread_info()->exec_domain 469 && current_thread_info()->exec_domain->signal_invmap 470 && sig < 32) 471 return current_thread_info()->exec_domain->signal_invmap[sig]; 472 else 473 return sig; 474 } 475 476 static int setup_frame32(int sig, struct k_sigaction *ka, 477 sigset_t *set, struct pt_regs * regs) 478 { 479 sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32)); 480 if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32))) 481 goto give_sigsegv; 482 483 if (frame == (void __user *) -1UL) 484 goto give_sigsegv; 485 486 if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32)) 487 goto give_sigsegv; 488 489 if (save_sigregs32(regs, &frame->sregs)) 490 goto give_sigsegv; 491 if (save_sigregs_gprs_high(regs, frame->gprs_high)) 492 goto give_sigsegv; 493 if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs)) 494 goto give_sigsegv; 495 496 /* Set up to return from userspace. If provided, use a stub 497 already in userspace. */ 498 if (ka->sa.sa_flags & SA_RESTORER) { 499 regs->gprs[14] = (__u64) ka->sa.sa_restorer; 500 } else { 501 regs->gprs[14] = (__u64) frame->retcode; 502 if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, 503 (u16 __user *)(frame->retcode))) 504 goto give_sigsegv; 505 } 506 507 /* Set up backchain. */ 508 if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 509 goto give_sigsegv; 510 511 /* Set up registers for signal handler */ 512 regs->gprs[15] = (__u64) frame; 513 regs->psw.addr = (__u64) ka->sa.sa_handler; 514 515 regs->gprs[2] = map_signal(sig); 516 regs->gprs[3] = (__u64) &frame->sc; 517 518 /* We forgot to include these in the sigcontext. 519 To avoid breaking binary compatibility, they are passed as args. */ 520 regs->gprs[4] = current->thread.trap_no; 521 regs->gprs[5] = current->thread.prot_addr; 522 523 /* Place signal number on stack to allow backtrace from handler. */ 524 if (__put_user(regs->gprs[2], (int __user *) &frame->signo)) 525 goto give_sigsegv; 526 return 0; 527 528 give_sigsegv: 529 force_sigsegv(sig, current); 530 return -EFAULT; 531 } 532 533 static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 534 sigset_t *set, struct pt_regs * regs) 535 { 536 int err = 0; 537 rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32)); 538 if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32))) 539 goto give_sigsegv; 540 541 if (frame == (void __user *) -1UL) 542 goto give_sigsegv; 543 544 if (copy_siginfo_to_user32(&frame->info, info)) 545 goto give_sigsegv; 546 547 /* Create the ucontext. */ 548 err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags); 549 err |= __put_user(0, &frame->uc.uc_link); 550 err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); 551 err |= __put_user(sas_ss_flags(regs->gprs[15]), 552 &frame->uc.uc_stack.ss_flags); 553 err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); 554 err |= save_sigregs32(regs, &frame->uc.uc_mcontext); 555 err |= save_sigregs_gprs_high(regs, frame->gprs_high); 556 err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); 557 if (err) 558 goto give_sigsegv; 559 560 /* Set up to return from userspace. If provided, use a stub 561 already in userspace. */ 562 if (ka->sa.sa_flags & SA_RESTORER) { 563 regs->gprs[14] = (__u64) ka->sa.sa_restorer; 564 } else { 565 regs->gprs[14] = (__u64) frame->retcode; 566 err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, 567 (u16 __user *)(frame->retcode)); 568 } 569 570 /* Set up backchain. */ 571 if (__put_user(regs->gprs[15], (unsigned int __user *) frame)) 572 goto give_sigsegv; 573 574 /* Set up registers for signal handler */ 575 regs->gprs[15] = (__u64) frame; 576 regs->psw.addr = (__u64) ka->sa.sa_handler; 577 578 regs->gprs[2] = map_signal(sig); 579 regs->gprs[3] = (__u64) &frame->info; 580 regs->gprs[4] = (__u64) &frame->uc; 581 return 0; 582 583 give_sigsegv: 584 force_sigsegv(sig, current); 585 return -EFAULT; 586 } 587 588 /* 589 * OK, we're invoking a handler 590 */ 591 592 int handle_signal32(unsigned long sig, struct k_sigaction *ka, 593 siginfo_t *info, sigset_t *oldset, struct pt_regs *regs) 594 { 595 sigset_t blocked; 596 int ret; 597 598 /* Set up the stack frame */ 599 if (ka->sa.sa_flags & SA_SIGINFO) 600 ret = setup_rt_frame32(sig, ka, info, oldset, regs); 601 else 602 ret = setup_frame32(sig, ka, oldset, regs); 603 if (ret) 604 return ret; 605 sigorsets(&blocked, ¤t->blocked, &ka->sa.sa_mask); 606 if (!(ka->sa.sa_flags & SA_NODEFER)) 607 sigaddset(&blocked, sig); 608 set_current_blocked(&blocked); 609 return 0; 610 } 611 612