Commit | Line | Data |
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3dd681d9 WD |
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 | ||
3dd681d9 WD |
21 | #include <linux/compat.h> |
22 | #include <linux/signal.h> | |
23 | #include <linux/syscalls.h> | |
24 | #include <linux/ratelimit.h> | |
25 | ||
9141300a | 26 | #include <asm/esr.h> |
3dd681d9 WD |
27 | #include <asm/fpsimd.h> |
28 | #include <asm/signal32.h> | |
29 | #include <asm/uaccess.h> | |
f3d447a9 | 30 | #include <asm/unistd32.h> |
3dd681d9 | 31 | |
3dd681d9 WD |
32 | struct compat_sigcontext { |
33 | /* We always set these two fields to 0 */ | |
34 | compat_ulong_t trap_no; | |
35 | compat_ulong_t error_code; | |
36 | ||
37 | compat_ulong_t oldmask; | |
38 | compat_ulong_t arm_r0; | |
39 | compat_ulong_t arm_r1; | |
40 | compat_ulong_t arm_r2; | |
41 | compat_ulong_t arm_r3; | |
42 | compat_ulong_t arm_r4; | |
43 | compat_ulong_t arm_r5; | |
44 | compat_ulong_t arm_r6; | |
45 | compat_ulong_t arm_r7; | |
46 | compat_ulong_t arm_r8; | |
47 | compat_ulong_t arm_r9; | |
48 | compat_ulong_t arm_r10; | |
49 | compat_ulong_t arm_fp; | |
50 | compat_ulong_t arm_ip; | |
51 | compat_ulong_t arm_sp; | |
52 | compat_ulong_t arm_lr; | |
53 | compat_ulong_t arm_pc; | |
54 | compat_ulong_t arm_cpsr; | |
55 | compat_ulong_t fault_address; | |
56 | }; | |
57 | ||
58 | struct compat_ucontext { | |
59 | compat_ulong_t uc_flags; | |
c0e01d5d | 60 | compat_uptr_t uc_link; |
3dd681d9 WD |
61 | compat_stack_t uc_stack; |
62 | struct compat_sigcontext uc_mcontext; | |
63 | compat_sigset_t uc_sigmask; | |
64 | int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))]; | |
65 | compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8))); | |
66 | }; | |
67 | ||
68 | struct compat_vfp_sigframe { | |
69 | compat_ulong_t magic; | |
70 | compat_ulong_t size; | |
71 | struct compat_user_vfp { | |
72 | compat_u64 fpregs[32]; | |
73 | compat_ulong_t fpscr; | |
74 | } ufp; | |
75 | struct compat_user_vfp_exc { | |
76 | compat_ulong_t fpexc; | |
77 | compat_ulong_t fpinst; | |
78 | compat_ulong_t fpinst2; | |
79 | } ufp_exc; | |
80 | } __attribute__((__aligned__(8))); | |
81 | ||
82 | #define VFP_MAGIC 0x56465001 | |
83 | #define VFP_STORAGE_SIZE sizeof(struct compat_vfp_sigframe) | |
84 | ||
9141300a CM |
85 | #define FSR_WRITE_SHIFT (11) |
86 | ||
3dd681d9 WD |
87 | struct compat_aux_sigframe { |
88 | struct compat_vfp_sigframe vfp; | |
89 | ||
90 | /* Something that isn't a valid magic number for any coprocessor. */ | |
91 | unsigned long end_magic; | |
92 | } __attribute__((__aligned__(8))); | |
93 | ||
94 | struct compat_sigframe { | |
95 | struct compat_ucontext uc; | |
96 | compat_ulong_t retcode[2]; | |
97 | }; | |
98 | ||
99 | struct compat_rt_sigframe { | |
100 | struct compat_siginfo info; | |
101 | struct compat_sigframe sig; | |
102 | }; | |
103 | ||
104 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
105 | ||
3dd681d9 WD |
106 | static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set) |
107 | { | |
108 | compat_sigset_t cset; | |
109 | ||
110 | cset.sig[0] = set->sig[0] & 0xffffffffull; | |
111 | cset.sig[1] = set->sig[0] >> 32; | |
112 | ||
113 | return copy_to_user(uset, &cset, sizeof(*uset)); | |
114 | } | |
115 | ||
116 | static inline int get_sigset_t(sigset_t *set, | |
117 | const compat_sigset_t __user *uset) | |
118 | { | |
119 | compat_sigset_t s32; | |
120 | ||
121 | if (copy_from_user(&s32, uset, sizeof(*uset))) | |
122 | return -EFAULT; | |
123 | ||
124 | set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
125 | return 0; | |
126 | } | |
127 | ||
ce395960 | 128 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from) |
3dd681d9 WD |
129 | { |
130 | int err; | |
131 | ||
132 | if (!access_ok(VERIFY_WRITE, to, sizeof(*to))) | |
133 | return -EFAULT; | |
134 | ||
135 | /* If you change siginfo_t structure, please be sure | |
136 | * this code is fixed accordingly. | |
137 | * It should never copy any pad contained in the structure | |
138 | * to avoid security leaks, but must copy the generic | |
139 | * 3 ints plus the relevant union member. | |
140 | * This routine must convert siginfo from 64bit to 32bit as well | |
141 | * at the same time. | |
142 | */ | |
143 | err = __put_user(from->si_signo, &to->si_signo); | |
144 | err |= __put_user(from->si_errno, &to->si_errno); | |
145 | err |= __put_user((short)from->si_code, &to->si_code); | |
146 | if (from->si_code < 0) | |
147 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, | |
148 | SI_PAD_SIZE); | |
149 | else switch (from->si_code & __SI_MASK) { | |
150 | case __SI_KILL: | |
151 | err |= __put_user(from->si_pid, &to->si_pid); | |
152 | err |= __put_user(from->si_uid, &to->si_uid); | |
153 | break; | |
154 | case __SI_TIMER: | |
155 | err |= __put_user(from->si_tid, &to->si_tid); | |
156 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
157 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, | |
158 | &to->si_ptr); | |
159 | break; | |
160 | case __SI_POLL: | |
161 | err |= __put_user(from->si_band, &to->si_band); | |
162 | err |= __put_user(from->si_fd, &to->si_fd); | |
163 | break; | |
164 | case __SI_FAULT: | |
165 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr, | |
166 | &to->si_addr); | |
167 | #ifdef BUS_MCEERR_AO | |
168 | /* | |
169 | * Other callers might not initialize the si_lsb field, | |
170 | * so check explicitely for the right codes here. | |
171 | */ | |
172 | if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO) | |
173 | err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); | |
174 | #endif | |
175 | break; | |
176 | case __SI_CHLD: | |
177 | err |= __put_user(from->si_pid, &to->si_pid); | |
178 | err |= __put_user(from->si_uid, &to->si_uid); | |
179 | err |= __put_user(from->si_status, &to->si_status); | |
180 | err |= __put_user(from->si_utime, &to->si_utime); | |
181 | err |= __put_user(from->si_stime, &to->si_stime); | |
182 | break; | |
183 | case __SI_RT: /* This is not generated by the kernel as of now. */ | |
184 | case __SI_MESGQ: /* But this is */ | |
185 | err |= __put_user(from->si_pid, &to->si_pid); | |
186 | err |= __put_user(from->si_uid, &to->si_uid); | |
187 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr); | |
188 | break; | |
189 | default: /* this is just in case for now ... */ | |
190 | err |= __put_user(from->si_pid, &to->si_pid); | |
191 | err |= __put_user(from->si_uid, &to->si_uid); | |
192 | break; | |
193 | } | |
194 | return err; | |
195 | } | |
196 | ||
197 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
198 | { | |
199 | memset(to, 0, sizeof *to); | |
200 | ||
201 | if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) || | |
202 | copy_from_user(to->_sifields._pad, | |
203 | from->_sifields._pad, SI_PAD_SIZE)) | |
204 | return -EFAULT; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | /* | |
210 | * VFP save/restore code. | |
211 | */ | |
212 | static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame) | |
213 | { | |
214 | struct fpsimd_state *fpsimd = ¤t->thread.fpsimd_state; | |
215 | compat_ulong_t magic = VFP_MAGIC; | |
216 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
217 | compat_ulong_t fpscr, fpexc; | |
218 | int err = 0; | |
219 | ||
220 | /* | |
221 | * Save the hardware registers to the fpsimd_state structure. | |
222 | * Note that this also saves V16-31, which aren't visible | |
223 | * in AArch32. | |
224 | */ | |
c51f9269 | 225 | fpsimd_preserve_current_state(); |
3dd681d9 WD |
226 | |
227 | /* Place structure header on the stack */ | |
228 | __put_user_error(magic, &frame->magic, err); | |
229 | __put_user_error(size, &frame->size, err); | |
230 | ||
231 | /* | |
232 | * Now copy the FP registers. Since the registers are packed, | |
233 | * we can copy the prefix we want (V0-V15) as it is. | |
234 | * FIXME: Won't work if big endian. | |
235 | */ | |
236 | err |= __copy_to_user(&frame->ufp.fpregs, fpsimd->vregs, | |
237 | sizeof(frame->ufp.fpregs)); | |
238 | ||
239 | /* Create an AArch32 fpscr from the fpsr and the fpcr. */ | |
240 | fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) | | |
241 | (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK); | |
242 | __put_user_error(fpscr, &frame->ufp.fpscr, err); | |
243 | ||
244 | /* | |
245 | * The exception register aren't available so we fake up a | |
246 | * basic FPEXC and zero everything else. | |
247 | */ | |
248 | fpexc = (1 << 30); | |
249 | __put_user_error(fpexc, &frame->ufp_exc.fpexc, err); | |
250 | __put_user_error(0, &frame->ufp_exc.fpinst, err); | |
251 | __put_user_error(0, &frame->ufp_exc.fpinst2, err); | |
252 | ||
253 | return err ? -EFAULT : 0; | |
254 | } | |
255 | ||
256 | static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame) | |
257 | { | |
258 | struct fpsimd_state fpsimd; | |
259 | compat_ulong_t magic = VFP_MAGIC; | |
260 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
261 | compat_ulong_t fpscr; | |
262 | int err = 0; | |
263 | ||
264 | __get_user_error(magic, &frame->magic, err); | |
265 | __get_user_error(size, &frame->size, err); | |
266 | ||
267 | if (err) | |
268 | return -EFAULT; | |
269 | if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE) | |
270 | return -EINVAL; | |
271 | ||
272 | /* | |
273 | * Copy the FP registers into the start of the fpsimd_state. | |
274 | * FIXME: Won't work if big endian. | |
275 | */ | |
276 | err |= __copy_from_user(fpsimd.vregs, frame->ufp.fpregs, | |
277 | sizeof(frame->ufp.fpregs)); | |
278 | ||
279 | /* Extract the fpsr and the fpcr from the fpscr */ | |
280 | __get_user_error(fpscr, &frame->ufp.fpscr, err); | |
281 | fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK; | |
282 | fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK; | |
283 | ||
284 | /* | |
285 | * We don't need to touch the exception register, so | |
286 | * reload the hardware state. | |
287 | */ | |
c51f9269 AB |
288 | if (!err) |
289 | fpsimd_update_current_state(&fpsimd); | |
3dd681d9 WD |
290 | |
291 | return err ? -EFAULT : 0; | |
292 | } | |
293 | ||
3dd681d9 WD |
294 | static int compat_restore_sigframe(struct pt_regs *regs, |
295 | struct compat_sigframe __user *sf) | |
296 | { | |
297 | int err; | |
298 | sigset_t set; | |
299 | struct compat_aux_sigframe __user *aux; | |
300 | ||
301 | err = get_sigset_t(&set, &sf->uc.uc_sigmask); | |
302 | if (err == 0) { | |
303 | sigdelsetmask(&set, ~_BLOCKABLE); | |
304 | set_current_blocked(&set); | |
305 | } | |
306 | ||
307 | __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
308 | __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
309 | __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
310 | __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
311 | __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
312 | __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
313 | __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
314 | __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
315 | __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
316 | __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
317 | __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
318 | __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
319 | __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
320 | __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
321 | __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
322 | __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
323 | __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
324 | ||
325 | /* | |
326 | * Avoid compat_sys_sigreturn() restarting. | |
327 | */ | |
328 | regs->syscallno = ~0UL; | |
329 | ||
330 | err |= !valid_user_regs(®s->user_regs); | |
331 | ||
332 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
333 | if (err == 0) | |
334 | err |= compat_restore_vfp_context(&aux->vfp); | |
335 | ||
336 | return err; | |
337 | } | |
338 | ||
339 | asmlinkage int compat_sys_sigreturn(struct pt_regs *regs) | |
340 | { | |
341 | struct compat_sigframe __user *frame; | |
342 | ||
343 | /* Always make any pending restarted system calls return -EINTR */ | |
344 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
345 | ||
346 | /* | |
347 | * Since we stacked the signal on a 64-bit boundary, | |
348 | * then 'sp' should be word aligned here. If it's | |
349 | * not, then the user is trying to mess with us. | |
350 | */ | |
351 | if (regs->compat_sp & 7) | |
352 | goto badframe; | |
353 | ||
354 | frame = (struct compat_sigframe __user *)regs->compat_sp; | |
355 | ||
356 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
357 | goto badframe; | |
358 | ||
359 | if (compat_restore_sigframe(regs, frame)) | |
360 | goto badframe; | |
361 | ||
362 | return regs->regs[0]; | |
363 | ||
364 | badframe: | |
365 | if (show_unhandled_signals) | |
366 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
367 | current->comm, task_pid_nr(current), __func__, | |
368 | regs->pc, regs->sp); | |
369 | force_sig(SIGSEGV, current); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs) | |
374 | { | |
375 | struct compat_rt_sigframe __user *frame; | |
376 | ||
377 | /* Always make any pending restarted system calls return -EINTR */ | |
378 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
379 | ||
380 | /* | |
381 | * Since we stacked the signal on a 64-bit boundary, | |
382 | * then 'sp' should be word aligned here. If it's | |
383 | * not, then the user is trying to mess with us. | |
384 | */ | |
385 | if (regs->compat_sp & 7) | |
386 | goto badframe; | |
387 | ||
388 | frame = (struct compat_rt_sigframe __user *)regs->compat_sp; | |
389 | ||
390 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
391 | goto badframe; | |
392 | ||
393 | if (compat_restore_sigframe(regs, &frame->sig)) | |
394 | goto badframe; | |
395 | ||
207bdae4 | 396 | if (compat_restore_altstack(&frame->sig.uc.uc_stack)) |
3dd681d9 WD |
397 | goto badframe; |
398 | ||
399 | return regs->regs[0]; | |
400 | ||
401 | badframe: | |
402 | if (show_unhandled_signals) | |
403 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
404 | current->comm, task_pid_nr(current), __func__, | |
405 | regs->pc, regs->sp); | |
406 | force_sig(SIGSEGV, current); | |
407 | return 0; | |
408 | } | |
409 | ||
88a24cff WD |
410 | static void __user *compat_get_sigframe(struct k_sigaction *ka, |
411 | struct pt_regs *regs, | |
412 | int framesize) | |
3dd681d9 WD |
413 | { |
414 | compat_ulong_t sp = regs->compat_sp; | |
415 | void __user *frame; | |
416 | ||
417 | /* | |
418 | * This is the X/Open sanctioned signal stack switching. | |
419 | */ | |
420 | if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) | |
421 | sp = current->sas_ss_sp + current->sas_ss_size; | |
422 | ||
423 | /* | |
424 | * ATPCS B01 mandates 8-byte alignment | |
425 | */ | |
426 | frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7)); | |
427 | ||
428 | /* | |
429 | * Check that we can actually write to the signal frame. | |
430 | */ | |
431 | if (!access_ok(VERIFY_WRITE, frame, framesize)) | |
432 | frame = NULL; | |
433 | ||
434 | return frame; | |
435 | } | |
436 | ||
060a18c7 WD |
437 | static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, |
438 | compat_ulong_t __user *rc, void __user *frame, | |
439 | int usig) | |
3dd681d9 WD |
440 | { |
441 | compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler); | |
442 | compat_ulong_t retcode; | |
443 | compat_ulong_t spsr = regs->pstate & ~PSR_f; | |
444 | int thumb; | |
445 | ||
446 | /* Check if the handler is written for ARM or Thumb */ | |
447 | thumb = handler & 1; | |
448 | ||
aa62c209 | 449 | if (thumb) |
3dd681d9 | 450 | spsr |= COMPAT_PSR_T_BIT; |
aa62c209 | 451 | else |
3dd681d9 | 452 | spsr &= ~COMPAT_PSR_T_BIT; |
aa62c209 P |
453 | |
454 | /* The IT state must be cleared for both ARM and Thumb-2 */ | |
455 | spsr &= ~COMPAT_PSR_IT_MASK; | |
3dd681d9 WD |
456 | |
457 | if (ka->sa.sa_flags & SA_RESTORER) { | |
458 | retcode = ptr_to_compat(ka->sa.sa_restorer); | |
459 | } else { | |
460 | /* Set up sigreturn pointer */ | |
461 | unsigned int idx = thumb << 1; | |
462 | ||
463 | if (ka->sa.sa_flags & SA_SIGINFO) | |
464 | idx += 3; | |
465 | ||
466 | retcode = AARCH32_VECTORS_BASE + | |
467 | AARCH32_KERN_SIGRET_CODE_OFFSET + | |
468 | (idx << 2) + thumb; | |
469 | } | |
470 | ||
471 | regs->regs[0] = usig; | |
472 | regs->compat_sp = ptr_to_compat(frame); | |
473 | regs->compat_lr = retcode; | |
474 | regs->pc = handler; | |
475 | regs->pstate = spsr; | |
3dd681d9 WD |
476 | } |
477 | ||
478 | static int compat_setup_sigframe(struct compat_sigframe __user *sf, | |
479 | struct pt_regs *regs, sigset_t *set) | |
480 | { | |
481 | struct compat_aux_sigframe __user *aux; | |
482 | int err = 0; | |
483 | ||
484 | __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
485 | __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
486 | __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
487 | __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
488 | __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
489 | __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
490 | __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
491 | __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
492 | __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
493 | __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
494 | __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
495 | __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
496 | __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
497 | __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
498 | __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
499 | __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
500 | __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
501 | ||
502 | __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err); | |
9141300a CM |
503 | /* set the compat FSR WnR */ |
504 | __put_user_error(!!(current->thread.fault_code & ESR_EL1_WRITE) << | |
505 | FSR_WRITE_SHIFT, &sf->uc.uc_mcontext.error_code, err); | |
3dd681d9 WD |
506 | __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err); |
507 | __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); | |
508 | ||
509 | err |= put_sigset_t(&sf->uc.uc_sigmask, set); | |
510 | ||
511 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
512 | ||
513 | if (err == 0) | |
514 | err |= compat_preserve_vfp_context(&aux->vfp); | |
515 | __put_user_error(0, &aux->end_magic, err); | |
516 | ||
517 | return err; | |
518 | } | |
519 | ||
520 | /* | |
521 | * 32-bit signal handling routines called from signal.c | |
522 | */ | |
523 | int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info, | |
524 | sigset_t *set, struct pt_regs *regs) | |
525 | { | |
526 | struct compat_rt_sigframe __user *frame; | |
3dd681d9 WD |
527 | int err = 0; |
528 | ||
529 | frame = compat_get_sigframe(ka, regs, sizeof(*frame)); | |
530 | ||
531 | if (!frame) | |
532 | return 1; | |
533 | ||
534 | err |= copy_siginfo_to_user32(&frame->info, info); | |
535 | ||
536 | __put_user_error(0, &frame->sig.uc.uc_flags, err); | |
c0e01d5d | 537 | __put_user_error(0, &frame->sig.uc.uc_link, err); |
3dd681d9 | 538 | |
207bdae4 | 539 | err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp); |
3dd681d9 WD |
540 | |
541 | err |= compat_setup_sigframe(&frame->sig, regs, set); | |
3dd681d9 WD |
542 | |
543 | if (err == 0) { | |
060a18c7 | 544 | compat_setup_return(regs, ka, frame->sig.retcode, frame, usig); |
3dd681d9 WD |
545 | regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info; |
546 | regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc; | |
547 | } | |
548 | ||
549 | return err; | |
550 | } | |
551 | ||
552 | int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, | |
553 | struct pt_regs *regs) | |
554 | { | |
555 | struct compat_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 | __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err); | |
564 | ||
565 | err |= compat_setup_sigframe(frame, regs, set); | |
566 | if (err == 0) | |
060a18c7 | 567 | compat_setup_return(regs, ka, frame->retcode, frame, usig); |
3dd681d9 WD |
568 | |
569 | return err; | |
570 | } | |
571 | ||
3dd681d9 WD |
572 | void compat_setup_restart_syscall(struct pt_regs *regs) |
573 | { | |
4ed27ecf | 574 | regs->regs[7] = __NR_compat_restart_syscall; |
3dd681d9 | 575 | } |