2 * Based on arch/arm/kernel/signal.c
4 * Copyright (C) 1995-2009 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 * Modified by Will Deacon <will.deacon@arm.com>
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.
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.
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/>.
21 #define __SYSCALL_COMPAT
23 #include <linux/compat.h>
24 #include <linux/signal.h>
25 #include <linux/syscalls.h>
26 #include <linux/ratelimit.h>
28 #include <asm/fpsimd.h>
29 #include <asm/signal32.h>
30 #include <asm/uaccess.h>
31 #include <asm/unistd.h>
33 typedef struct compat_siginfo {
39 /* The padding is the same size as AArch64. */
40 int _pad[SI_PAD_SIZE];
44 compat_pid_t _pid; /* sender's pid */
45 __compat_uid32_t _uid; /* sender's uid */
50 compat_timer_t _tid; /* timer id */
51 int _overrun; /* overrun count */
52 compat_sigval_t _sigval; /* same as below */
53 int _sys_private; /* not to be passed to user */
56 /* POSIX.1b signals */
58 compat_pid_t _pid; /* sender's pid */
59 __compat_uid32_t _uid; /* sender's uid */
60 compat_sigval_t _sigval;
65 compat_pid_t _pid; /* which child */
66 __compat_uid32_t _uid; /* sender's uid */
67 int _status; /* exit code */
68 compat_clock_t _utime;
69 compat_clock_t _stime;
72 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
74 compat_uptr_t _addr; /* faulting insn/memory ref. */
75 short _addr_lsb; /* LSB of the reported address */
80 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
86 struct compat_sigaction {
87 compat_uptr_t sa_handler;
88 compat_ulong_t sa_flags;
89 compat_uptr_t sa_restorer;
90 compat_sigset_t sa_mask;
93 struct compat_old_sigaction {
94 compat_uptr_t sa_handler;
95 compat_old_sigset_t sa_mask;
96 compat_ulong_t sa_flags;
97 compat_uptr_t sa_restorer;
100 typedef struct compat_sigaltstack {
103 compat_size_t ss_size;
106 struct compat_sigcontext {
107 /* We always set these two fields to 0 */
108 compat_ulong_t trap_no;
109 compat_ulong_t error_code;
111 compat_ulong_t oldmask;
112 compat_ulong_t arm_r0;
113 compat_ulong_t arm_r1;
114 compat_ulong_t arm_r2;
115 compat_ulong_t arm_r3;
116 compat_ulong_t arm_r4;
117 compat_ulong_t arm_r5;
118 compat_ulong_t arm_r6;
119 compat_ulong_t arm_r7;
120 compat_ulong_t arm_r8;
121 compat_ulong_t arm_r9;
122 compat_ulong_t arm_r10;
123 compat_ulong_t arm_fp;
124 compat_ulong_t arm_ip;
125 compat_ulong_t arm_sp;
126 compat_ulong_t arm_lr;
127 compat_ulong_t arm_pc;
128 compat_ulong_t arm_cpsr;
129 compat_ulong_t fault_address;
132 struct compat_ucontext {
133 compat_ulong_t uc_flags;
134 struct compat_ucontext *uc_link;
135 compat_stack_t uc_stack;
136 struct compat_sigcontext uc_mcontext;
137 compat_sigset_t uc_sigmask;
138 int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))];
139 compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8)));
142 struct compat_vfp_sigframe {
143 compat_ulong_t magic;
145 struct compat_user_vfp {
146 compat_u64 fpregs[32];
147 compat_ulong_t fpscr;
149 struct compat_user_vfp_exc {
150 compat_ulong_t fpexc;
151 compat_ulong_t fpinst;
152 compat_ulong_t fpinst2;
154 } __attribute__((__aligned__(8)));
156 #define VFP_MAGIC 0x56465001
157 #define VFP_STORAGE_SIZE sizeof(struct compat_vfp_sigframe)
159 struct compat_aux_sigframe {
160 struct compat_vfp_sigframe vfp;
162 /* Something that isn't a valid magic number for any coprocessor. */
163 unsigned long end_magic;
164 } __attribute__((__aligned__(8)));
166 struct compat_sigframe {
167 struct compat_ucontext uc;
168 compat_ulong_t retcode[2];
171 struct compat_rt_sigframe {
172 struct compat_siginfo info;
173 struct compat_sigframe sig;
176 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
179 * For ARM syscalls, the syscall number has to be loaded into r7.
180 * We do not support an OABI userspace.
182 #define MOV_R7_NR_SIGRETURN (0xe3a07000 | __NR_sigreturn)
183 #define SVC_SYS_SIGRETURN (0xef000000 | __NR_sigreturn)
184 #define MOV_R7_NR_RT_SIGRETURN (0xe3a07000 | __NR_rt_sigreturn)
185 #define SVC_SYS_RT_SIGRETURN (0xef000000 | __NR_rt_sigreturn)
188 * For Thumb syscalls, we also pass the syscall number via r7. We therefore
189 * need two 16-bit instructions.
191 #define SVC_THUMB_SIGRETURN (((0xdf00 | __NR_sigreturn) << 16) | \
192 0x2700 | __NR_sigreturn)
193 #define SVC_THUMB_RT_SIGRETURN (((0xdf00 | __NR_rt_sigreturn) << 16) | \
194 0x2700 | __NR_rt_sigreturn)
196 const compat_ulong_t aarch32_sigret_code[6] = {
198 * AArch32 sigreturn code.
199 * We don't construct an OABI SWI - instead we just set the imm24 field
200 * to the EABI syscall number so that we create a sane disassembly.
202 MOV_R7_NR_SIGRETURN, SVC_SYS_SIGRETURN, SVC_THUMB_SIGRETURN,
203 MOV_R7_NR_RT_SIGRETURN, SVC_SYS_RT_SIGRETURN, SVC_THUMB_RT_SIGRETURN,
206 static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
208 compat_sigset_t cset;
210 cset.sig[0] = set->sig[0] & 0xffffffffull;
211 cset.sig[1] = set->sig[0] >> 32;
213 return copy_to_user(uset, &cset, sizeof(*uset));
216 static inline int get_sigset_t(sigset_t *set,
217 const compat_sigset_t __user *uset)
221 if (copy_from_user(&s32, uset, sizeof(*uset)))
224 set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
228 int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
232 if (!access_ok(VERIFY_WRITE, to, sizeof(*to)))
235 /* If you change siginfo_t structure, please be sure
236 * this code is fixed accordingly.
237 * It should never copy any pad contained in the structure
238 * to avoid security leaks, but must copy the generic
239 * 3 ints plus the relevant union member.
240 * This routine must convert siginfo from 64bit to 32bit as well
243 err = __put_user(from->si_signo, &to->si_signo);
244 err |= __put_user(from->si_errno, &to->si_errno);
245 err |= __put_user((short)from->si_code, &to->si_code);
246 if (from->si_code < 0)
247 err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad,
249 else switch (from->si_code & __SI_MASK) {
251 err |= __put_user(from->si_pid, &to->si_pid);
252 err |= __put_user(from->si_uid, &to->si_uid);
255 err |= __put_user(from->si_tid, &to->si_tid);
256 err |= __put_user(from->si_overrun, &to->si_overrun);
257 err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr,
261 err |= __put_user(from->si_band, &to->si_band);
262 err |= __put_user(from->si_fd, &to->si_fd);
265 err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr,
269 * Other callers might not initialize the si_lsb field,
270 * so check explicitely for the right codes here.
272 if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)
273 err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
277 err |= __put_user(from->si_pid, &to->si_pid);
278 err |= __put_user(from->si_uid, &to->si_uid);
279 err |= __put_user(from->si_status, &to->si_status);
280 err |= __put_user(from->si_utime, &to->si_utime);
281 err |= __put_user(from->si_stime, &to->si_stime);
283 case __SI_RT: /* This is not generated by the kernel as of now. */
284 case __SI_MESGQ: /* But this is */
285 err |= __put_user(from->si_pid, &to->si_pid);
286 err |= __put_user(from->si_uid, &to->si_uid);
287 err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr);
289 default: /* this is just in case for now ... */
290 err |= __put_user(from->si_pid, &to->si_pid);
291 err |= __put_user(from->si_uid, &to->si_uid);
297 int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
299 memset(to, 0, sizeof *to);
301 if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) ||
302 copy_from_user(to->_sifields._pad,
303 from->_sifields._pad, SI_PAD_SIZE))
310 * VFP save/restore code.
312 static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame)
314 struct fpsimd_state *fpsimd = ¤t->thread.fpsimd_state;
315 compat_ulong_t magic = VFP_MAGIC;
316 compat_ulong_t size = VFP_STORAGE_SIZE;
317 compat_ulong_t fpscr, fpexc;
321 * Save the hardware registers to the fpsimd_state structure.
322 * Note that this also saves V16-31, which aren't visible
325 fpsimd_save_state(fpsimd);
327 /* Place structure header on the stack */
328 __put_user_error(magic, &frame->magic, err);
329 __put_user_error(size, &frame->size, err);
332 * Now copy the FP registers. Since the registers are packed,
333 * we can copy the prefix we want (V0-V15) as it is.
334 * FIXME: Won't work if big endian.
336 err |= __copy_to_user(&frame->ufp.fpregs, fpsimd->vregs,
337 sizeof(frame->ufp.fpregs));
339 /* Create an AArch32 fpscr from the fpsr and the fpcr. */
340 fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) |
341 (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK);
342 __put_user_error(fpscr, &frame->ufp.fpscr, err);
345 * The exception register aren't available so we fake up a
346 * basic FPEXC and zero everything else.
349 __put_user_error(fpexc, &frame->ufp_exc.fpexc, err);
350 __put_user_error(0, &frame->ufp_exc.fpinst, err);
351 __put_user_error(0, &frame->ufp_exc.fpinst2, err);
353 return err ? -EFAULT : 0;
356 static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
358 struct fpsimd_state fpsimd;
359 compat_ulong_t magic = VFP_MAGIC;
360 compat_ulong_t size = VFP_STORAGE_SIZE;
361 compat_ulong_t fpscr;
364 __get_user_error(magic, &frame->magic, err);
365 __get_user_error(size, &frame->size, err);
369 if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
373 * Copy the FP registers into the start of the fpsimd_state.
374 * FIXME: Won't work if big endian.
376 err |= __copy_from_user(fpsimd.vregs, frame->ufp.fpregs,
377 sizeof(frame->ufp.fpregs));
379 /* Extract the fpsr and the fpcr from the fpscr */
380 __get_user_error(fpscr, &frame->ufp.fpscr, err);
381 fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK;
382 fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK;
385 * We don't need to touch the exception register, so
386 * reload the hardware state.
390 fpsimd_load_state(&fpsimd);
394 return err ? -EFAULT : 0;
398 * atomically swap in the new signal mask, and wait for a signal.
400 asmlinkage int compat_sys_sigsuspend(int restart, compat_ulong_t oldmask,
401 compat_old_sigset_t mask)
405 siginitset(¤t->blocked, mask);
406 return sigsuspend(&blocked);
409 asmlinkage int compat_sys_sigaction(int sig,
410 const struct compat_old_sigaction __user *act,
411 struct compat_old_sigaction __user *oact)
413 struct k_sigaction new_ka, old_ka;
415 compat_old_sigset_t mask;
416 compat_uptr_t handler, restorer;
419 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
420 __get_user(handler, &act->sa_handler) ||
421 __get_user(restorer, &act->sa_restorer) ||
422 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
423 __get_user(mask, &act->sa_mask))
426 new_ka.sa.sa_handler = compat_ptr(handler);
427 new_ka.sa.sa_restorer = compat_ptr(restorer);
428 siginitset(&new_ka.sa.sa_mask, mask);
431 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
434 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
435 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
436 &oact->sa_handler) ||
437 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
438 &oact->sa_restorer) ||
439 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
440 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
447 asmlinkage int compat_sys_rt_sigaction(int sig,
448 const struct compat_sigaction __user *act,
449 struct compat_sigaction __user *oact,
450 compat_size_t sigsetsize)
452 struct k_sigaction new_ka, old_ka;
455 /* XXX: Don't preclude handling different sized sigset_t's. */
456 if (sigsetsize != sizeof(compat_sigset_t))
460 compat_uptr_t handler, restorer;
462 ret = get_user(handler, &act->sa_handler);
463 new_ka.sa.sa_handler = compat_ptr(handler);
464 ret |= get_user(restorer, &act->sa_restorer);
465 new_ka.sa.sa_restorer = compat_ptr(restorer);
466 ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
467 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
472 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
474 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
475 ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
476 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
481 int compat_do_sigaltstack(compat_uptr_t compat_uss, compat_uptr_t compat_uoss,
484 compat_stack_t __user *newstack = compat_ptr(compat_uss);
485 compat_stack_t __user *oldstack = compat_ptr(compat_uoss);
491 /* Marshall the compat new stack into a stack_t */
493 if (get_user(ss_sp, &newstack->ss_sp) ||
494 __get_user(uss.ss_flags, &newstack->ss_flags) ||
495 __get_user(uss.ss_size, &newstack->ss_size))
497 uss.ss_sp = compat_ptr(ss_sp);
502 /* The __user pointer casts are valid because of the set_fs() */
503 ret = do_sigaltstack(
504 newstack ? (stack_t __user *) &uss : NULL,
505 oldstack ? (stack_t __user *) &uoss : NULL,
509 /* Convert the old stack_t into a compat stack. */
510 if (!ret && oldstack &&
511 (put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
512 __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
513 __put_user(uoss.ss_size, &oldstack->ss_size)))
518 static int compat_restore_sigframe(struct pt_regs *regs,
519 struct compat_sigframe __user *sf)
523 struct compat_aux_sigframe __user *aux;
525 err = get_sigset_t(&set, &sf->uc.uc_sigmask);
527 sigdelsetmask(&set, ~_BLOCKABLE);
528 set_current_blocked(&set);
531 __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
532 __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
533 __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
534 __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
535 __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
536 __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
537 __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
538 __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
539 __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
540 __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
541 __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
542 __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
543 __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
544 __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
545 __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
546 __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
547 __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
550 * Avoid compat_sys_sigreturn() restarting.
552 regs->syscallno = ~0UL;
554 err |= !valid_user_regs(®s->user_regs);
556 aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
558 err |= compat_restore_vfp_context(&aux->vfp);
563 asmlinkage int compat_sys_sigreturn(struct pt_regs *regs)
565 struct compat_sigframe __user *frame;
567 /* Always make any pending restarted system calls return -EINTR */
568 current_thread_info()->restart_block.fn = do_no_restart_syscall;
571 * Since we stacked the signal on a 64-bit boundary,
572 * then 'sp' should be word aligned here. If it's
573 * not, then the user is trying to mess with us.
575 if (regs->compat_sp & 7)
578 frame = (struct compat_sigframe __user *)regs->compat_sp;
580 if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
583 if (compat_restore_sigframe(regs, frame))
586 return regs->regs[0];
589 if (show_unhandled_signals)
590 pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
591 current->comm, task_pid_nr(current), __func__,
593 force_sig(SIGSEGV, current);
597 asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs)
599 struct compat_rt_sigframe __user *frame;
601 /* Always make any pending restarted system calls return -EINTR */
602 current_thread_info()->restart_block.fn = do_no_restart_syscall;
605 * Since we stacked the signal on a 64-bit boundary,
606 * then 'sp' should be word aligned here. If it's
607 * not, then the user is trying to mess with us.
609 if (regs->compat_sp & 7)
612 frame = (struct compat_rt_sigframe __user *)regs->compat_sp;
614 if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
617 if (compat_restore_sigframe(regs, &frame->sig))
620 if (compat_do_sigaltstack(ptr_to_compat(&frame->sig.uc.uc_stack),
621 ptr_to_compat((void __user *)NULL),
622 regs->compat_sp) == -EFAULT)
625 return regs->regs[0];
628 if (show_unhandled_signals)
629 pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
630 current->comm, task_pid_nr(current), __func__,
632 force_sig(SIGSEGV, current);
636 static inline void __user *compat_get_sigframe(struct k_sigaction *ka,
637 struct pt_regs *regs,
640 compat_ulong_t sp = regs->compat_sp;
644 * This is the X/Open sanctioned signal stack switching.
646 if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
647 sp = current->sas_ss_sp + current->sas_ss_size;
650 * ATPCS B01 mandates 8-byte alignment
652 frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7));
655 * Check that we can actually write to the signal frame.
657 if (!access_ok(VERIFY_WRITE, frame, framesize))
663 static int compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka,
664 compat_ulong_t __user *rc, void __user *frame,
667 compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler);
668 compat_ulong_t retcode;
669 compat_ulong_t spsr = regs->pstate & ~PSR_f;
672 /* Check if the handler is written for ARM or Thumb */
676 spsr |= COMPAT_PSR_T_BIT;
677 spsr &= ~COMPAT_PSR_IT_MASK;
679 spsr &= ~COMPAT_PSR_T_BIT;
682 if (ka->sa.sa_flags & SA_RESTORER) {
683 retcode = ptr_to_compat(ka->sa.sa_restorer);
685 /* Set up sigreturn pointer */
686 unsigned int idx = thumb << 1;
688 if (ka->sa.sa_flags & SA_SIGINFO)
691 retcode = AARCH32_VECTORS_BASE +
692 AARCH32_KERN_SIGRET_CODE_OFFSET +
696 regs->regs[0] = usig;
697 regs->compat_sp = ptr_to_compat(frame);
698 regs->compat_lr = retcode;
705 static int compat_setup_sigframe(struct compat_sigframe __user *sf,
706 struct pt_regs *regs, sigset_t *set)
708 struct compat_aux_sigframe __user *aux;
711 __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
712 __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
713 __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
714 __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
715 __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
716 __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
717 __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
718 __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
719 __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
720 __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
721 __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
722 __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
723 __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
724 __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
725 __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
726 __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
727 __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
729 __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err);
730 __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.error_code, err);
731 __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err);
732 __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
734 err |= put_sigset_t(&sf->uc.uc_sigmask, set);
736 aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
739 err |= compat_preserve_vfp_context(&aux->vfp);
740 __put_user_error(0, &aux->end_magic, err);
746 * 32-bit signal handling routines called from signal.c
748 int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
749 sigset_t *set, struct pt_regs *regs)
751 struct compat_rt_sigframe __user *frame;
752 compat_stack_t stack;
755 frame = compat_get_sigframe(ka, regs, sizeof(*frame));
760 err |= copy_siginfo_to_user32(&frame->info, info);
762 __put_user_error(0, &frame->sig.uc.uc_flags, err);
763 __put_user_error(NULL, &frame->sig.uc.uc_link, err);
765 memset(&stack, 0, sizeof(stack));
766 stack.ss_sp = (compat_uptr_t)current->sas_ss_sp;
767 stack.ss_flags = sas_ss_flags(regs->compat_sp);
768 stack.ss_size = current->sas_ss_size;
769 err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
771 err |= compat_setup_sigframe(&frame->sig, regs, set);
773 err = compat_setup_return(regs, ka, frame->sig.retcode, frame,
777 regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info;
778 regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc;
784 int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
785 struct pt_regs *regs)
787 struct compat_sigframe __user *frame;
790 frame = compat_get_sigframe(ka, regs, sizeof(*frame));
795 __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
797 err |= compat_setup_sigframe(frame, regs, set);
799 err = compat_setup_return(regs, ka, frame->retcode, frame, usig);
805 * RT signals don't have generic compat wrappers.
806 * See arch/powerpc/kernel/signal_32.c
808 asmlinkage int compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
809 compat_sigset_t __user *oset,
810 compat_size_t sigsetsize)
815 mm_segment_t old_fs = get_fs();
818 if (get_sigset_t(&s, set))
823 /* This is valid because of the set_fs() */
824 up = (sigset_t __user *) &s;
825 ret = sys_rt_sigprocmask(how, set ? up : NULL, oset ? up : NULL,
831 if (put_sigset_t(oset, &s))
837 asmlinkage int compat_sys_rt_sigpending(compat_sigset_t __user *set,
838 compat_size_t sigsetsize)
842 mm_segment_t old_fs = get_fs();
845 /* The __user pointer cast is valid because of the set_fs() */
846 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
849 if (put_sigset_t(set, &s))
855 asmlinkage int compat_sys_rt_sigqueueinfo(int pid, int sig,
856 compat_siginfo_t __user *uinfo)
860 mm_segment_t old_fs = get_fs();
862 ret = copy_siginfo_from_user32(&info, uinfo);
867 /* The __user pointer cast is valid because of the set_fs() */
868 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
873 void compat_setup_restart_syscall(struct pt_regs *regs)
875 regs->regs[7] = __NR_restart_syscall;