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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 | ||
26 | #include <asm/fpsimd.h> | |
27 | #include <asm/signal32.h> | |
28 | #include <asm/uaccess.h> | |
6fa3eb70 | 29 | #include <asm/unistd.h> |
3dd681d9 | 30 | |
3dd681d9 WD |
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; | |
c0e01d5d | 59 | compat_uptr_t uc_link; |
3dd681d9 WD |
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 | */ | |
4ed27ecf CM |
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) | |
3dd681d9 WD |
111 | |
112 | /* | |
113 | * For Thumb syscalls, we also pass the syscall number via r7. We therefore | |
114 | * need two 16-bit instructions. | |
115 | */ | |
4ed27ecf CM |
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) | |
3dd681d9 WD |
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((compat_uptr_t)(unsigned long)from->si_ptr, | |
183 | &to->si_ptr); | |
184 | break; | |
185 | case __SI_POLL: | |
186 | err |= __put_user(from->si_band, &to->si_band); | |
187 | err |= __put_user(from->si_fd, &to->si_fd); | |
188 | break; | |
189 | case __SI_FAULT: | |
190 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr, | |
191 | &to->si_addr); | |
192 | #ifdef BUS_MCEERR_AO | |
193 | /* | |
194 | * Other callers might not initialize the si_lsb field, | |
195 | * so check explicitely for the right codes here. | |
196 | */ | |
197 | if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO) | |
198 | err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); | |
199 | #endif | |
200 | break; | |
201 | case __SI_CHLD: | |
202 | err |= __put_user(from->si_pid, &to->si_pid); | |
203 | err |= __put_user(from->si_uid, &to->si_uid); | |
204 | err |= __put_user(from->si_status, &to->si_status); | |
205 | err |= __put_user(from->si_utime, &to->si_utime); | |
206 | err |= __put_user(from->si_stime, &to->si_stime); | |
207 | break; | |
208 | case __SI_RT: /* This is not generated by the kernel as of now. */ | |
209 | case __SI_MESGQ: /* But this is */ | |
210 | err |= __put_user(from->si_pid, &to->si_pid); | |
211 | err |= __put_user(from->si_uid, &to->si_uid); | |
212 | err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr); | |
213 | break; | |
6fa3eb70 S |
214 | #ifdef __ARCH_SIGSYS |
215 | case __SI_SYS: | |
216 | err |= __put_user((compat_uptr_t)(unsigned long) | |
217 | from->si_call_addr, &to->si_call_addr); | |
218 | err |= __put_user(from->si_syscall, &to->si_syscall); | |
219 | err |= __put_user(from->si_arch, &to->si_arch); | |
220 | break; | |
221 | #endif | |
3dd681d9 WD |
222 | default: /* this is just in case for now ... */ |
223 | err |= __put_user(from->si_pid, &to->si_pid); | |
224 | err |= __put_user(from->si_uid, &to->si_uid); | |
225 | break; | |
226 | } | |
227 | return err; | |
228 | } | |
229 | ||
230 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
231 | { | |
232 | memset(to, 0, sizeof *to); | |
233 | ||
234 | if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) || | |
235 | copy_from_user(to->_sifields._pad, | |
236 | from->_sifields._pad, SI_PAD_SIZE)) | |
237 | return -EFAULT; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | /* | |
243 | * VFP save/restore code. | |
244 | */ | |
245 | static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame) | |
246 | { | |
247 | struct fpsimd_state *fpsimd = ¤t->thread.fpsimd_state; | |
248 | compat_ulong_t magic = VFP_MAGIC; | |
249 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
250 | compat_ulong_t fpscr, fpexc; | |
251 | int err = 0; | |
252 | ||
253 | /* | |
254 | * Save the hardware registers to the fpsimd_state structure. | |
255 | * Note that this also saves V16-31, which aren't visible | |
256 | * in AArch32. | |
257 | */ | |
6fa3eb70 | 258 | fpsimd_preserve_current_state(); |
3dd681d9 WD |
259 | |
260 | /* Place structure header on the stack */ | |
261 | __put_user_error(magic, &frame->magic, err); | |
262 | __put_user_error(size, &frame->size, err); | |
263 | ||
264 | /* | |
265 | * Now copy the FP registers. Since the registers are packed, | |
266 | * we can copy the prefix we want (V0-V15) as it is. | |
267 | * FIXME: Won't work if big endian. | |
268 | */ | |
269 | err |= __copy_to_user(&frame->ufp.fpregs, fpsimd->vregs, | |
270 | sizeof(frame->ufp.fpregs)); | |
271 | ||
272 | /* Create an AArch32 fpscr from the fpsr and the fpcr. */ | |
273 | fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) | | |
274 | (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK); | |
275 | __put_user_error(fpscr, &frame->ufp.fpscr, err); | |
276 | ||
277 | /* | |
278 | * The exception register aren't available so we fake up a | |
279 | * basic FPEXC and zero everything else. | |
280 | */ | |
281 | fpexc = (1 << 30); | |
282 | __put_user_error(fpexc, &frame->ufp_exc.fpexc, err); | |
283 | __put_user_error(0, &frame->ufp_exc.fpinst, err); | |
284 | __put_user_error(0, &frame->ufp_exc.fpinst2, err); | |
285 | ||
286 | return err ? -EFAULT : 0; | |
287 | } | |
288 | ||
289 | static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame) | |
290 | { | |
291 | struct fpsimd_state fpsimd; | |
292 | compat_ulong_t magic = VFP_MAGIC; | |
293 | compat_ulong_t size = VFP_STORAGE_SIZE; | |
294 | compat_ulong_t fpscr; | |
295 | int err = 0; | |
296 | ||
297 | __get_user_error(magic, &frame->magic, err); | |
298 | __get_user_error(size, &frame->size, err); | |
299 | ||
300 | if (err) | |
301 | return -EFAULT; | |
302 | if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE) | |
303 | return -EINVAL; | |
304 | ||
305 | /* | |
306 | * Copy the FP registers into the start of the fpsimd_state. | |
307 | * FIXME: Won't work if big endian. | |
308 | */ | |
309 | err |= __copy_from_user(fpsimd.vregs, frame->ufp.fpregs, | |
310 | sizeof(frame->ufp.fpregs)); | |
311 | ||
312 | /* Extract the fpsr and the fpcr from the fpscr */ | |
313 | __get_user_error(fpscr, &frame->ufp.fpscr, err); | |
314 | fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK; | |
315 | fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK; | |
316 | ||
317 | /* | |
318 | * We don't need to touch the exception register, so | |
319 | * reload the hardware state. | |
320 | */ | |
6fa3eb70 S |
321 | if (!err) |
322 | fpsimd_update_current_state(&fpsimd); | |
3dd681d9 WD |
323 | |
324 | return err ? -EFAULT : 0; | |
325 | } | |
326 | ||
3dd681d9 WD |
327 | static int compat_restore_sigframe(struct pt_regs *regs, |
328 | struct compat_sigframe __user *sf) | |
329 | { | |
330 | int err; | |
331 | sigset_t set; | |
332 | struct compat_aux_sigframe __user *aux; | |
333 | ||
334 | err = get_sigset_t(&set, &sf->uc.uc_sigmask); | |
335 | if (err == 0) { | |
336 | sigdelsetmask(&set, ~_BLOCKABLE); | |
337 | set_current_blocked(&set); | |
338 | } | |
339 | ||
340 | __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
341 | __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
342 | __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
343 | __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
344 | __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
345 | __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
346 | __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
347 | __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
348 | __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
349 | __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
350 | __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
351 | __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
352 | __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
353 | __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
354 | __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
355 | __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
356 | __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
357 | ||
358 | /* | |
359 | * Avoid compat_sys_sigreturn() restarting. | |
360 | */ | |
361 | regs->syscallno = ~0UL; | |
362 | ||
363 | err |= !valid_user_regs(®s->user_regs); | |
364 | ||
365 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
366 | if (err == 0) | |
367 | err |= compat_restore_vfp_context(&aux->vfp); | |
368 | ||
369 | return err; | |
370 | } | |
371 | ||
372 | asmlinkage int compat_sys_sigreturn(struct pt_regs *regs) | |
373 | { | |
374 | struct compat_sigframe __user *frame; | |
375 | ||
376 | /* Always make any pending restarted system calls return -EINTR */ | |
377 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
378 | ||
379 | /* | |
380 | * Since we stacked the signal on a 64-bit boundary, | |
381 | * then 'sp' should be word aligned here. If it's | |
382 | * not, then the user is trying to mess with us. | |
383 | */ | |
384 | if (regs->compat_sp & 7) | |
385 | goto badframe; | |
386 | ||
387 | frame = (struct compat_sigframe __user *)regs->compat_sp; | |
388 | ||
389 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
390 | goto badframe; | |
391 | ||
392 | if (compat_restore_sigframe(regs, frame)) | |
393 | goto badframe; | |
394 | ||
395 | return regs->regs[0]; | |
396 | ||
397 | badframe: | |
398 | if (show_unhandled_signals) | |
399 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
400 | current->comm, task_pid_nr(current), __func__, | |
401 | regs->pc, regs->sp); | |
402 | force_sig(SIGSEGV, current); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs) | |
407 | { | |
408 | struct compat_rt_sigframe __user *frame; | |
409 | ||
410 | /* Always make any pending restarted system calls return -EINTR */ | |
411 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
412 | ||
413 | /* | |
414 | * Since we stacked the signal on a 64-bit boundary, | |
415 | * then 'sp' should be word aligned here. If it's | |
416 | * not, then the user is trying to mess with us. | |
417 | */ | |
418 | if (regs->compat_sp & 7) | |
419 | goto badframe; | |
420 | ||
421 | frame = (struct compat_rt_sigframe __user *)regs->compat_sp; | |
422 | ||
423 | if (!access_ok(VERIFY_READ, frame, sizeof (*frame))) | |
424 | goto badframe; | |
425 | ||
426 | if (compat_restore_sigframe(regs, &frame->sig)) | |
427 | goto badframe; | |
428 | ||
207bdae4 | 429 | if (compat_restore_altstack(&frame->sig.uc.uc_stack)) |
3dd681d9 WD |
430 | goto badframe; |
431 | ||
432 | return regs->regs[0]; | |
433 | ||
434 | badframe: | |
435 | if (show_unhandled_signals) | |
436 | pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n", | |
437 | current->comm, task_pid_nr(current), __func__, | |
438 | regs->pc, regs->sp); | |
439 | force_sig(SIGSEGV, current); | |
440 | return 0; | |
441 | } | |
442 | ||
88a24cff WD |
443 | static void __user *compat_get_sigframe(struct k_sigaction *ka, |
444 | struct pt_regs *regs, | |
445 | int framesize) | |
3dd681d9 WD |
446 | { |
447 | compat_ulong_t sp = regs->compat_sp; | |
448 | void __user *frame; | |
449 | ||
450 | /* | |
451 | * This is the X/Open sanctioned signal stack switching. | |
452 | */ | |
453 | if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) | |
454 | sp = current->sas_ss_sp + current->sas_ss_size; | |
455 | ||
456 | /* | |
457 | * ATPCS B01 mandates 8-byte alignment | |
458 | */ | |
459 | frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7)); | |
460 | ||
461 | /* | |
462 | * Check that we can actually write to the signal frame. | |
463 | */ | |
464 | if (!access_ok(VERIFY_WRITE, frame, framesize)) | |
465 | frame = NULL; | |
466 | ||
467 | return frame; | |
468 | } | |
469 | ||
060a18c7 WD |
470 | static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, |
471 | compat_ulong_t __user *rc, void __user *frame, | |
472 | int usig) | |
3dd681d9 WD |
473 | { |
474 | compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler); | |
475 | compat_ulong_t retcode; | |
476 | compat_ulong_t spsr = regs->pstate & ~PSR_f; | |
477 | int thumb; | |
478 | ||
479 | /* Check if the handler is written for ARM or Thumb */ | |
480 | thumb = handler & 1; | |
481 | ||
482 | if (thumb) { | |
483 | spsr |= COMPAT_PSR_T_BIT; | |
484 | spsr &= ~COMPAT_PSR_IT_MASK; | |
485 | } else { | |
486 | spsr &= ~COMPAT_PSR_T_BIT; | |
487 | } | |
488 | ||
489 | if (ka->sa.sa_flags & SA_RESTORER) { | |
490 | retcode = ptr_to_compat(ka->sa.sa_restorer); | |
491 | } else { | |
492 | /* Set up sigreturn pointer */ | |
493 | unsigned int idx = thumb << 1; | |
494 | ||
495 | if (ka->sa.sa_flags & SA_SIGINFO) | |
496 | idx += 3; | |
497 | ||
498 | retcode = AARCH32_VECTORS_BASE + | |
499 | AARCH32_KERN_SIGRET_CODE_OFFSET + | |
500 | (idx << 2) + thumb; | |
501 | } | |
502 | ||
503 | regs->regs[0] = usig; | |
504 | regs->compat_sp = ptr_to_compat(frame); | |
505 | regs->compat_lr = retcode; | |
506 | regs->pc = handler; | |
507 | regs->pstate = spsr; | |
3dd681d9 WD |
508 | } |
509 | ||
510 | static int compat_setup_sigframe(struct compat_sigframe __user *sf, | |
511 | struct pt_regs *regs, sigset_t *set) | |
512 | { | |
513 | struct compat_aux_sigframe __user *aux; | |
514 | int err = 0; | |
515 | ||
516 | __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err); | |
517 | __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err); | |
518 | __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err); | |
519 | __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err); | |
520 | __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err); | |
521 | __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err); | |
522 | __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err); | |
523 | __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err); | |
524 | __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err); | |
525 | __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err); | |
526 | __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err); | |
527 | __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err); | |
528 | __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err); | |
529 | __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err); | |
530 | __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err); | |
531 | __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err); | |
532 | __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err); | |
533 | ||
534 | __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err); | |
535 | __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.error_code, err); | |
536 | __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err); | |
537 | __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); | |
538 | ||
539 | err |= put_sigset_t(&sf->uc.uc_sigmask, set); | |
540 | ||
541 | aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace; | |
542 | ||
543 | if (err == 0) | |
544 | err |= compat_preserve_vfp_context(&aux->vfp); | |
545 | __put_user_error(0, &aux->end_magic, err); | |
546 | ||
547 | return err; | |
548 | } | |
549 | ||
550 | /* | |
551 | * 32-bit signal handling routines called from signal.c | |
552 | */ | |
553 | int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info, | |
554 | sigset_t *set, struct pt_regs *regs) | |
555 | { | |
556 | struct compat_rt_sigframe __user *frame; | |
3dd681d9 WD |
557 | int err = 0; |
558 | ||
559 | frame = compat_get_sigframe(ka, regs, sizeof(*frame)); | |
560 | ||
561 | if (!frame) | |
562 | return 1; | |
563 | ||
564 | err |= copy_siginfo_to_user32(&frame->info, info); | |
565 | ||
566 | __put_user_error(0, &frame->sig.uc.uc_flags, err); | |
c0e01d5d | 567 | __put_user_error(0, &frame->sig.uc.uc_link, err); |
3dd681d9 | 568 | |
207bdae4 | 569 | err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp); |
3dd681d9 WD |
570 | |
571 | err |= compat_setup_sigframe(&frame->sig, regs, set); | |
3dd681d9 WD |
572 | |
573 | if (err == 0) { | |
060a18c7 | 574 | compat_setup_return(regs, ka, frame->sig.retcode, frame, usig); |
3dd681d9 WD |
575 | regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info; |
576 | regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc; | |
577 | } | |
578 | ||
579 | return err; | |
580 | } | |
581 | ||
582 | int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, | |
583 | struct pt_regs *regs) | |
584 | { | |
585 | struct compat_sigframe __user *frame; | |
586 | int err = 0; | |
587 | ||
588 | frame = compat_get_sigframe(ka, regs, sizeof(*frame)); | |
589 | ||
590 | if (!frame) | |
591 | return 1; | |
592 | ||
593 | __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err); | |
594 | ||
595 | err |= compat_setup_sigframe(frame, regs, set); | |
596 | if (err == 0) | |
060a18c7 | 597 | compat_setup_return(regs, ka, frame->retcode, frame, usig); |
3dd681d9 WD |
598 | |
599 | return err; | |
600 | } | |
601 | ||
3dd681d9 WD |
602 | void compat_setup_restart_syscall(struct pt_regs *regs) |
603 | { | |
4ed27ecf | 604 | regs->regs[7] = __NR_compat_restart_syscall; |
3dd681d9 | 605 | } |